CN201198123Y - Anti-sway directional hand bit - Google Patents

Abstract

The anti-swing directional manual screwdriver belongs to the manual tool. The existing technology has defects such as loud noise when used, easy swaying of the working rod, short service life, and poor repairability. The utility model installs the working rod on the handle through a bearing. On the top, there is a torque transmission part between the torque receiving part of the working rod and the torque application part of the handle, and the state change of the torque transmission part is realized by the orientation conversion part; thereby realizing the conversion work while preventing swinging and shaking; its structure Simple, easy to assemble, not prone to failure; strong integrity.

Description

Anti-sway directional hand bit

technical field

The utility model belongs to hand tools, in particular to an anti-sway directional hand screwdriver.

Background technique

Manual screwdriver is a kind of manual tool that holds the handle by hand and rotates to drive the working rod to apply torque to the corresponding parts. Screwdriver (also called screwdriver) is a representative example. Traditional manual screwdriver The tool is to fix the working rod and the handle together. When using it, such as tightening or loosening a screw with a screwdriver, since the hand holding the handle can only rotate a small angle, when it is necessary to continuously adjust a part When turning, it is necessary to stop and let the hand turn an angle in the opposite direction. Sometimes the hand-held screwdriver is temporarily withdrawn from the part to achieve the opposite direction. In this way, the screwdriver needs to be aligned with the part again, sometimes with the other hand It assists the hand holding the handle to release the handle to realize the reverse rotation. Obviously, these two methods are inconvenient and affect the working efficiency.

In order to overcome the above deficiencies, a directional hand screwdriver was born as needed. The "orientation" function of this manual screwdriver is to rotate the handle in one direction so that the handle rotates with the working rod to apply torque to the part, and rotate the handle in the other direction. The seasonal handle rotates relative to the working rod to position the working rod on the part, so the handle can be held by hand to rotate back and forth continuously without stopping, so as to achieve the purpose of quickly tightening or loosening the part. Further, this action is reversible. U.S. Patent No. 4,485,699 discloses such a directional manual screwdriver, which is provided with an inner chamber on the handle, and the working rod is axially positioned in the inner chamber to limit the working rod from coming out of the inner chamber, and at the same time on the working rod There are two cylindrical clutch sections with a larger diameter separated by a neutral section with a smaller diameter. In addition, two clutches with opposite acting directions and sleeved on the neutral section and a clutch section are placed in the inner cavity. A push button pushes the clutch to slide in the inner cavity, so that when one clutch cooperates with one clutch section, the other clutch is in the position corresponding to the neutral section, and the "orientation" function is realized through the position conversion of this clutch; it has been verified by analysis and practice , the above-mentioned directional manual screwdriver has the following defects:

1. At least two shiftable clutches are required to realize the "orientation" function, and two clutch sections and one neutral section are set on the working rod, which has a complex structure;

2. In order to ensure that the clutch can slide in the inner cavity, the reliability of the combination of the clutch and the handle is lost, so the torque it bears is difficult to meet the requirements;

3. When the two clutches slide and shift in the inner cavity, their movement is between the clutch section and the neutral section with different diameters, and the reliability is poor. In severe cases, the roller may lose the cooperation with the clutch section;

4, the handle of the scheme of this patent is made of two parts, after assembling the working rod, the clutch and the push button, the two parts that constitute the handle are welded together, so the repairability of the tool when it breaks down is poor.

In addition, China's utility model patent No. ZL01243225.3 (notification number CN2492345Y) discloses a "screwdriver" technical solution, "the inner cavity of the tubular handle fixes the main shaft through a pair of bearings, and there is a pair of positive and negative ratchets in the middle of the main shaft. The wall is located at the tooth top of the ratchet and has an opening. The opening is hinged with a reversing plate with positive and negative pawls along the axial direction of the handle, and the blade is coaxially connected with the main shaft. When this screwdriver is used, any external ratchet mechanism can be used on the blade body. When the knife edge is still inserted in the groove of the nail cap, the working hand is rotated in the opposite direction to reset. Compared with ordinary screwdrivers, the steps of disengaging and aligning the blade and the groove on the nail cap are omitted in one fell swoop. , so the use of this screwdriver is quite time-saving, and the work efficiency is high." Also after analysis and practice verification, the above-mentioned directional manual screwdriver has the following defects:

1. Although a pair of bearings are used to fix the main shaft, the knife body needs to be inserted into the fixing hole of the main shaft when in use, so even if the main shaft does not swing, it is difficult to ensure that the knife body swings relative to the main shaft, which affects the use;

2. There is an opening on the handle wall at the tooth top of the ratchet, and the reversing plate with positive and negative pawls is hinged at the opening along the axial direction of the handle. Such a structure leads to poor integrity of the handle, which is not conducive to holding by hand, and , the opening of the handle wall at the tooth top of the ratchet is open, and some debris and dust are easy to enter the inner cavity of the handle, affecting the cooperation between the forward and reverse pawls and the forward and reverse ratchets, and affecting the flexible rotation of the main shaft;

3. This patent achieves orientation by setting forward and reverse pawls and forward and reverse pawls, which has a complex structure and inaccurate cooperation.

The technical problem to be solved and the technical task proposed by the utility model are to overcome the poor accuracy, small transmission torque, short service life and poor repairability of the working rod due to the easy swing of the working rod when used in the prior art; Shaking makes the length of the working rod shorter than the ordinary torque, making the use range of the product smaller and other defects. An anti-swing directional manual screwdriver is provided. For this reason, the utility model adopts the following technical solutions:

Anti-sway directional hand bit, characterized by including:

a handle having a torque applying portion and an axial bore in which two separate bearing seats are disposed;

A working rod, its front section has a working head (its working head can be integrated with the working rod, or it can be separated and exchanged), and its rear section extends into the inner hole of the handle and is arranged in the said handle by two The bearing support on the bearing seat is also provided with a torque receiving part on its rear section;

an orientation switch controllably disposed on said handle and positionable in at least two positions;

The torque transmitting part is interposed between the torque applying part on the handle and the torque receiving part on the working rod and is controlled by the orientation conversion part, and its state is switched as the position of the orientation conversion part changes.

In the above technical solution, first, the bearing is used to install and position the working rod in the inner hole of the handle to realize the centering of the working rod, so as to prevent the working rod from swinging and shaking when rotating; secondly, the state of the torque transmission part is made change in order to transmit torque in the opposite direction for directional function. Its structure is simple, its action is flexible and reliable, it is easy to assemble and disassemble for maintenance, and it has a long service life.

As a further improvement and supplement to the above technical solution, the utility model also includes the following additional technical features:

first:

A mold cavity is provided in the inner hole of the handle, and the torque applying part is formed on the inner surface of the mold cavity at least two pairs of oppositely arranged first wedge-shaped surfaces and second wedge-shaped surfaces uniformly distributed in the circumferential direction, each forming a free accommodation area at the intersection of the first wedge surface and the second wedge surface;

The torque receiving part is a cylindrical section arranged on the working rod corresponding to the first wedge-shaped surface and the second wedge-shaped surface of the cavity;

The orientation conversion part is a cage, which is sleeved on the working rod and is located at the front end of the handle to cover the cavity. It has the same logarithm as the first wedge-shaped surface and the second wedge-shaped surface and a through stopper surrounding the cylindrical section of the working rod;

The torque transmitting member is a needle roller having the same logarithm as that of the first wedge surface and the second wedge surface. The position conversion of the cage is respectively bounded between the first wedge-shaped surface and the cylindrical section of the working rod and between the second wedge-shaped surface and the cylindrical section of the working rod.

This implementation method selects the needle roller as the component that transmits the torque applied to the handle to the working rod. It acts in a rotating manner during work, with flexible rotation, low noise, and a quiet effect; and the transposition of the needle roller is realized through the cage. , so that the working rod can achieve the function of "orientation" in two directions (clockwise and counterclockwise). Reach the purpose of the utility model thus.

More specifically:

The handle includes a body and a sleeve-like part fixedly connected with the body, and the cavity is formed on the sleeve-like part. Such a structure is easy to select materials with appropriate hardness and rigidity to set up the cavity, and at the same time ensures that the handle of the body has good gripability, taking into account the technical requirements of the two aspects.

The first wedge-shaped surface and the second wedge-shaped surface are curved surfaces and/or planes. Such a structure is beneficial to squeeze the needle roller between the wedge surface and the cylindrical section of the working rod to achieve reliable torque transmission.

The retainer and the handle are respectively provided with a limit groove and a limit protrusion which cooperate with each other. This structure limits the rotation range of the cage and has strong operability.

The retainer and the handle are respectively provided with positioning grooves and positioning pins that cooperate with each other, and the positioning pins are supported by springs. This structure can position the cage at the corresponding working position, enhancing operability.

The cage includes a knob cover covering the mold cavity and a shift block fixed with the knob cover, and the transparent limiting part is arranged on the shift block. This structure facilitates processing and manufacturing, and facilitates setting the positioning grooves and/or positioning pins relatively concealed, so as to maintain the integrity of the tool.

The retainer has a locating surface, and the working rod is provided with a shoulder that abuts against the locating surface and exerts force from the retainer into the handle. Such a structure realizes the positioning of the cage through the working rod, prevents the cage from leaving the working position, and makes the hand tool of the utility model easy to assemble.

The working rod passes through the cage and two bearings in sequence and is connected with a nut to realize positioning. The structure is easy to assemble.

Secondly:

The torque applying portion is at least a pair of oppositely disposed first force application surfaces and second force application surfaces formed inside the handle;

The torque receiving part is a ratchet arranged on the working rod;

The orientation conversion part is a dial, which is located inside the handle corresponding to the first force application surface and the second force application surface;

The torque transmission member is a ratchet placed between the first force application surface and the ratchet wheel and between the second force application surface and the ratchet wheel, and the ratchet is supported by a A holding space is formed inside the handle to hold the springs on the first force application surface and the ratchet, the second force application surface and the ratchet.

This implementation method selects the needle roller as the torque transmission part, and transmits the torque applied to the handle to the working rod, which is reliable in work, strong in torque bearing capacity, flexible in rotation and long in service life; easy to change the state; The change of state is simple and easy, so that the working rod can realize the function of "orientation" in two directions relative to each other.

More specifically:

The ratchet is in the shape of a gear, and the ratchet is provided with ratchets that can be matched with the ratchet; the first force application surface and the second force application surface are the distances between each part on the above and the center of the ratchet wheel For flat or curved surfaces that change from small to large, corresponding slopes are provided on the dial and pawl. When this structure changes the position of the ratchet, it can make the ratchet slide along the first force application surface or the second force application surface and stay away from the ratchet so as not to transmit torque, or close to the ratchet to realize the gap between the force application surface and the ratchet. Torque transmission between.

The handle includes a body and a sleeve-shaped part fixedly connected with the body, and the first force-applying surface and the second force-applying surface are formed on the sleeve-shaped part. Such a structure is easy to choose materials with appropriate hardness and rigidity to set up the first force application surface and the second force application surface, and at the same time ensures that the handle of the body has good gripability, taking into account the technical requirements of both strength and grip performance.

The working rod passes through the knob cover, the sleeve-like part and two bearings in sequence and is connected with a nut to realize positioning. Easy to assemble.

The shift column is arranged on a knob cover, and the knob cover and the handle are respectively provided with positioning pins and positioning grooves that cooperate with each other, and the positioning pins are supported by springs.

The tail end of the handle is connected with a detachable tail cap that blocks the inner hole. In this way, the inner hole is sealed to avoid the entry of sundries and dust, while ensuring the integrity of the handle.

The beneficial effects of the utility model are:

1. The working rod is installed and positioned in the inner hole of the handle by the bearing to realize the centering of the working rod, preventing the working rod from swaying when rotating, which can improve the accuracy of work and reduce misoperation;

2. Since the sway of the working rod is reduced during rotation, the length of the working rod can be as long as that of the ordinary screwdriver, which expands the scope of use of the directional screwdriver;

3. Use needle roller or pawl as the torque transmission part, and the movement is flexible during work;

4. The transposition of the torque transmission part is realized through the cage or the dial column, so that the working rod can be relatively "oriented" in at least two directions;

5. Constrain the needle roller or pawl as a torque transmission part inside the handle, while achieving flexible transposition, ensure that the needle roller or pawl is in a reasonable working position, and is not prone to failure;

6. When changing the position, it can be realized by rotating the cage or the dial column at a small angle, and there is no change in the appearance of the tool, and the integrity of the tool is good;

7. The length-to-diameter ratio (that is, the ratio of length to diameter) of the needle roller is large, and it is evenly distributed around the cylindrical section of the working rod in the circumferential direction, so its movement is stable and the transmission torque is uniform;

8. When the needle roller is used as the torque transmission member, there is no resistance to idling (that is, to rotate in the direction opposite to the direction of the torque transmission), and almost no torque is transmitted, so it can effectively prevent the operated parts such as screws from rotating with the working rod.

9. The cage set on the working rod can assist the bearing to center the working rod and prevent the working rod from swaying;

10. Strong operability, easy assembly, not easy to break down, easy to repair; long service life.

Description of drawings

Fig. 1 is a schematic outline of an embodiment of the utility model.

Figure 2 is a schematic structural view of the working rod of the present invention.

Fig. 3 is a cross-sectional view taken along line K-K of Fig. 1 .

Fig. 4a is a schematic diagram of a state of the A-A section in Fig. 1 .

Fig. 4b is a schematic diagram of another state of the A-A section in Fig. 1 .

Fig. 5a is a schematic diagram of a state of the B-B section in Fig. 1 .

Fig. 5b is a schematic diagram of another state of the B-B section in Fig. 1 .

Fig. 6a is a schematic diagram of the appearance of the knob cover of the present invention.

Fig. 6b is a cross-sectional view along line C-C of Fig. 6a.

Fig. 7a is a schematic diagram of the appearance of the sleeve-shaped component of the present invention.

Fig. 7b is a left side view of Fig. 7a.

Fig. 7c is a D-D cross-sectional view of Fig. 7b.

Fig. 7d is a cross-sectional view along E-E direction of Fig. 7c.

Fig. 8a is a schematic diagram of the appearance of the shifting block of the present invention.

Figure 8b is a left side view of Figure 8a.

Figure 8c is a right side view of Figure 8a.

Fig. 8d is a top view of Fig. 8a.

Fig. 8e is a cross-sectional view along the line G-G of Fig. 8d.

Fig. 9 is a structural schematic diagram of the tail cap of the present invention.

Fig. 10 is a structural schematic diagram of the handle of the present utility model.

Fig. 11 is a schematic axial sectional view of another embodiment of the present invention.

Fig. 12 is a schematic cross-sectional view taken along the line P-P in Fig. 11 .

FIG. 13 is a schematic cross-sectional view taken along the Q-Q direction of FIG. 11 .

FIG. 14 is a schematic cross-sectional view along R-R direction of FIG. 11 .

FIG. 15 is a schematic diagram of the state when the manual screwdriver with the structure shown in FIG. 11 rotates counterclockwise to apply torque to the part.

Fig. 16 is a schematic diagram of the state when the manual screwdriver with the structure shown in Fig. 11 rotates clockwise to apply torque to the part.

In the picture:

1 - handle,

11—ontology,

12—sleeve-like parts,

                               

     1C/1D—Bearing seat,

                             

                                               

                                       

                                   

                               

                                             

                                             

                                                   

                                                     

                                       

                                         

2—working rod,

2A—working head,

  2B/2C—Installation Department,

2D—cylindrical segment,

2E—external thread,

2F—shaft shoulder,

2G—Ratchet,

  2H- replaceable working head;

3—cage,

31—knob cover,

                                   

                             

                                    

                               

32—shift block,

                             

                         

                         

                              

                               

                           

                               

34—Retaining ring for holes,

35—Positioning marbles,

36—support spring,

37—column, 37A/37B—slope;

4—needle;

5—tail cover;

6—lock nut;

7A/7B—bearing;

8A—the first ratchet, 8A1—the inclined plane, 8B—the second ratchet, 8B1—the second inclined plane;

9A/9B—spring.

Detailed ways

Embodiment one

The anti-sway directional manual screwdriver shown in Figures 1, 3, 4a, 4b, 5a, and 5b is assembled from handle 1, working rod 2, cage 3, needle roller 4, and tail cover 5. As a preferred embodiment of the present utility model, the following describes the concept of the present utility model by describing the structure of each component and its assembly relationship and mutual action cooperation:

As shown in Figure 10, the handle has an inner hole 1A in the axial direction, and two separate bearing seats 1C, 1D and a cavity 1B are arranged in the inner hole 1A; specifically, the handle 1 includes a body 11 and A sleeve-like part 12 fixed together with the body 11 (the specific structure of the sleeve-like part 12 is shown in Fig. It is directly injection molded together with the body 11 in the mold, or the sleeve part 12 can be pressed into the body 11 after the body injection molding; the cavity 1B is formed on the sleeve part 12, and the cavity 1B has three pairs of opposite The first wedge-shaped surface 1E and the second wedge-shaped surface 1F that are arranged and uniformly distributed in the circumferential direction are used as torque application parts (the reverse setting is that the first wedge-shaped surface 1E and the second wedge-shaped surface 1F are connected with the cylindrical section of the working rod mentioned below The space formed between 1D is in the opposite direction from small to large, that is, one is clockwise and the other is counterclockwise), and the intersection of each pair of first wedge-shaped surfaces 1E and second wedge-shaped surfaces 1F forms a free accommodation area 1G , the existence of the free accommodation area 1G provides accommodation space for the position change of the needle roller 4. In order to ensure that the sleeve-shaped component 12 and the body 11 are reliably fixed and withstand a large enough torque, the contact part of the sleeve-shaped component 12 and the body 11 is set to be non-circular shape (see FIG. 7d); further, a limiting groove 1H and two positioning grooves 1J, 1K are provided on the inner side wall of the end of the sleeve-like component 12 (see FIG. 7b);

Working rod as shown in Figure 2, it is a long rod, has working head 2A at its front end, and this working head 2A can directly process the end of working rod to form, also can install replaceable working head, work There are two mounting parts 2B, 2C and a cylindrical section 2D as a torque receiving part on the rear section of the rod. There is an external thread 2E at the rear end of the working rod 2, and a shaft shoulder 2F is formed at the lower end of the cylindrical section 2D. In specific cases, the diameter of the cylindrical section 2D can be equal to or different from the diameter of the front section of the working rod;

The cage 3 is used as an orientation conversion part, and it is a component structure, which includes a knob cover 31, a dial block 32, a retaining ring 34 for a hole, a positioning pin 35, and a support spring 36; the knob cover 31 is shown in Figures 6a and 6b, and its A through hole is provided in the center of the end face 31A to allow the working rod to pass through, the inner wall of the end face 31A is provided with an embedded groove 31B, and the inner surface of the side wall is provided with a ring groove 31C; the shifting block 32 is shown in Figures 8a, 8b, 8c, 8d, and 8e , one end has a boss 32A corresponding to the embedded groove 31B on the inner wall of the end face and a flange 32B corresponding to the annular groove 31C, so this end can be placed in the knob cover 31, so that the boss 32A is inserted into the embedded groove 31B, then place the retaining ring 34 for the hole in the ring groove 31C to block the flange 32B to realize the assembly of the knob cover 31 and the dial block 32, so that when the knob cover 31 is turned, the torque can be transmitted to the dial block 32; further, The main body of the shifting block 32 is composed of three columns 32C uniformly distributed in the circumferential direction, and three transparent stoppers 32D are formed between the three columns 32C, and the ends of the three columns 32C are formed by an end plate 32E The connection is used to maintain the matching relationship between the three and enhance its strength. In addition, a through hole is opened in the center of the end plate, and the inner edge of the through hole is formed as a positioning surface 32F (see Figure 3); Position protrusion 32G and a hole, the positioning pin 35 and the spring 36 are placed in the hole, and the spring 36 is supported on the rear side of the positioning pin 35;

The needle roller 4 is used as a torque transmission member, which is elongated and cylindrical. In this embodiment, there are three, or four or more;

As shown in FIG. 9 , the tail cap 5 is a component connected with the handle 1 .

The components of the above structure can be assembled in the following manner:

Two bearings 7A, 7B (such as radial ball bearings) can be placed on the two bearing seats 1C, 1D respectively, the rear section of the working rod 2 passes through the cage 3, and then the three needle rollers 4 are placed on the The three transparent limit parts 32D are placed into the cavity 1B together with the working rod 2 and the shifting block 32, so that the working rod 2 passes through the two bearings 7A and 7B to expose the external thread 2E, and the two mounting parts 2B and 2C are respectively connected to the two Corresponding to the two bearings 7A and 7B, the limit protrusion 32G is located in the limit groove 1H, the positioning pin is located in a positioning groove 1J or 1K, and the three needle rollers 4 are bounded by the cylindrical section 2D and the first wedge surface 1E or the second wedge surface. Between the surfaces 1F, finally screw the anti-loosening nut 6 on the external thread 2E of the working rod until the shaft shoulder 2F on the working rod 2 touches the above-mentioned positioning surface 32F, thereby realizing the positioning of each component, the nut The tightness of 6 can be judged by the swing and axial movement of the working rod 2 and the gap between the knob cover 31 and the handle 1; finally, the tail cover 5 is connected to the tail end of the handle 1 to seal the inner hole 1A. After the assembly is completed, the cooperation between the various parts is shown in detail in Figures 3, 4a, 4b, 5a, 5b and other figures.

The above-mentioned assembled manual screwdriver can be rotated by hand to change the position of the knob cover 31 relative to the handle 1 between the two positioning grooves 1J and 1K, so as to change the direction of the torque generated by the hand tool of the present invention:

As shown in Figure 4a, at this time, the three needle rollers 4 are respectively bounded between the three first wedge-shaped surfaces 1E and the cylindrical section 2D of the working rod. Then the three needle rollers 4 roll clockwise due to the friction of the first wedge-shaped surface 1E and the cylindrical section 2D (at least the tendency to roll clockwise). Due to the existence of the first wedge-shaped surface, the needle rollers 4 roll in this direction The movement space becomes narrower and narrower, so it is squeezed between the first wedge-shaped surface 1E and the cylindrical section 2D, preventing the working rod from rotating relative to the handle, and prompting the working rod to rotate together with the handle, so that the The torque is transmitted to the working rod through the three needle rollers, and then to the parts (such as screws, nuts), so as to realize the tightening or loosening of the parts. Moreover, the greater the torque that the three needle rollers bear, the greater their ability to transmit torque Conversely, hold the handle 1 and rotate it in the counterclockwise direction shown by the arrow in Figure 5a, and the three needle rollers 4 will roll counterclockwise due to the friction of the first wedge-shaped surface 1E and the cylindrical segment 2D. , also due to the existence of the first wedge-shaped surface, the three needle rollers move toward a wider and wider space, thereby making the handle rotate relative to the working rod; accordingly, it is not necessary to let go or remove the working head of the working rod from the part To evacuate, you only need to continuously turn the handle repeatedly to complete the operation.

As another working state, the hand-held knob cover 31 is turned clockwise according to the state shown in Figure 4a, and the position of the entire cage 3 can be converted to the state shown in Figure 4b. Toggle to switch from the position shown in Figure 4a to the position shown in Figure 4b through the free accommodation area 1G, at this time the three needle rollers 4 are respectively bounded between the three second wedge-shaped surfaces 1F and the cylindrical section 2D of the working rod; at this time As shown by the arrow in Figure 5b, hold the handle 1 in the counterclockwise direction and rotate it, and the three needle rollers 4 will roll counterclockwise (at least in the counterclockwise direction) due to the friction of the second wedge surface 1F and the cylindrical section 2D. trend), due to the existence of the second wedge-shaped surface, the space for the movement of the needle roller 4 in this direction becomes narrower and narrower, thus being squeezed between the second wedge-shaped surface 1F and the cylindrical section 2D, preventing the working rod from moving relative to the handle Rotate to impel the working rod to rotate together with the handle, so that the torque from the handle can be transmitted to the working rod through three needle rollers, and then to the parts (such as screws, nuts), to realize the tightening or loosening of the parts, and , the greater the torque that the three needle rollers bear, the ability to transmit the torque will also increase; on the contrary, if the handle is rotated by hand in the opposite clockwise direction as shown by the arrow in Figure 5b, the three needle rollers 4 will be affected by the The friction between the second wedge-shaped surface 1F and the cylindrical section 2D produces clockwise rolling. Also due to the existence of the second wedge-shaped surface, the three needle rollers 4 move toward a wider and wider space, thereby making the handle 1 relative to the working rod 2 According to this, you don't need to let go or withdraw the working head of the working rod from the parts, and you only need to continuously turn the handle repeatedly to work continuously.

The above two states of Fig. 5a and 5b are very practical in actual use. Taking the screw as an example, the manual screwdriver of the present utility model can be used to tighten the screw and loosen the screw again; further, the same screw, because The direction of thread can be divided into left-handed and right-handed. Therefore, the manual screwdriver of the present invention is suitable for both left-handed and right-handed. It is only necessary to switch the position of the needle roller by turning the knob cover to be respectively aligned with the first wedge-shaped surface and the second. The two wedge-shaped surfaces can be matched.

Embodiment two

The anti-swing directional manual screwdriver shown in Figures 11, 12, 13, and 14 is assembled from a handle 1, a working rod 2, a knob cover 31, two pawls 8A, 8B, and a tail cover 5. As a preferred embodiment of the present utility model, the following describes the concept of the present utility model by describing the structure of each component and its assembly relationship and mutual action cooperation:

The handle has an inner hole 1A in the axial direction, and two separate bearing seats 1C, 1D are arranged in the inner hole 1A; specifically, the handle 1 includes a body 11 and a sleeve-shaped part 12 fixed with the body 11 , as a specific form of fixing, the sleeve-shaped part 12 can be placed in the mold as an insert and directly injected with the body 11 (see Embodiment 1), and symmetry is formed on the inner surface of the sleeve-shaped part (relative to a sleeve-shaped The first force application surface 1M and the second force application surface 1N of the radial straight line X-X symmetry in the center of the component) are used as torque application parts, and the distance between each part of the first force application surface 1M and the second force application surface 1N and the center of the ratchet is A plane or a curved surface where the distance between small and large becomes large; accommodating spaces 1P1 and 1P2 are provided corresponding to the first force application surface 1M and the second force application surface 1N, and a blind hole is opened on the side wall of the sleeve-like component, and the blind hole A positioning pin 12A is built in the hole, and a spring 12B is supported on the rear side of the pin 12A;

Working rod is a long rod, has working head 2A in its front section, can be set with changeable working head 2H at working head 2A, (this illustration (Fig. 11) is four in one and can also be six in one or eight in one One, etc.) to achieve multi-function. There are two mounting parts 2B, 2C and a gear-shaped ratchet 2D as a torque transmission part on the rear section of the working rod 2, and an external thread 2E is provided at the rear end of the working rod 2;

A through hole is opened in the center of the knob cover 31 so as to pass through the working rod. There are three positioning pits 31D on its side, and a dial 37 extending to the inside of the handle as a directional conversion piece is arranged on its inner end surface. The two sides of the dial 37 are inclined surfaces 37A. , 37B:

The two pawls 8A, 8B are respectively placed in the aforementioned two accommodating spaces 1P1, 1P2 as torque transmission parts, and their one ends are respectively supported by springs 9A, 9B, and their other ends are in contact with the first force application surface 1M and the second force application surface 1M respectively. Inclined surfaces 8A1 and 8B1 are respectively provided on the force application surface 1N. The inclined surfaces 8A1 and 8B1 correspond to the inclined surfaces 37A and 37B on the dial 37, and ratchets are provided on the inner surface thereof;

The tail cap 5 is a component connected with the handle 1 .

The components of the above structure can be assembled in the following manner:

Two bearings 7A, 7B (such as radial ball bearings) can be placed on two bearing seats 1C, 1D respectively, and the rear section of the working rod 2 passes through the sleeve-shaped part and the two bearings 7A, 7B in turn to expose The external thread 2E and the nut are installed to realize the positioning of the working rod on the handle; then the two pawls 8A, 8B are placed in the two accommodation spaces 1P1, 1P2; At the front end, the setting pin 37 is located between the two pawls 8A, 8B, and the positioning pin 12A is located in a positioning hole 31D (see FIG. 12 ).

The above assembled hand screwdriver can be rotated by hand to change the position of the knob cover 31 relative to the handle 1 between the three positioning pits, so as to change the direction of the torque generated by the hand tool of the present invention:

As shown in Figure 15, it is the state after holding the knob cover 31 relative to the handle and rotating clockwise from the state shown in Figure 12. The pawl 8B fits on the ratchet 2G. At this time, the handle is rotated counterclockwise, and the torque from the handle is transmitted to the second pawl 8B through the second force-applying surface 1N, and the second pawl 8B is then transmitted to the ratchet 2G. , so that the working rod head 2A works; on the contrary, when the handle is rotated clockwise, the counterclockwise torque from the working rod 2 acts on the second pawl 8B through the ratchet 2G, forcing the second pawl 8B to The second force-applying surface 1N slides counterclockwise to disengage from the ratchet 2G. If the rotation continues, the second pawl 8B slides past each ratchet of the ratchet 2G under the support of the spring 9B.

As shown in Figure 16, it is the state after holding the knob cover relative to the handle and rotating counterclockwise from the state shown in Figure 12. At this time, the second ratchet 8B is pushed away from the ratchet 2G by the column, and only the first ratchet 8A fits on the ratchet 2G. At this time, the handle is rotated clockwise, and the torque from the handle is transmitted to the first pawl 8A through the first force-applying surface 1M, and the first pawl is then transmitted to the ratchet 2G to make the work The rod head 2A works; on the contrary, when the handle is rotated counterclockwise, the clockwise torque from the working rod 2 acts on the first pawl 8A through the ratchet 2G, forcing the first pawl 8A to operate in the first position. The force surface 1M slides clockwise to disengage from the ratchet 2G. If the rotation continues, the first pawl 8A slides over each ratchet of the ratchet 2G under the support of the spring.

When the pin is in the position shown in Figure 12, the two pawls work at the same time. At this time, the directional screwdriver is the same as the ordinary screwdriver. The working rod is fixed and loses the "orientation" function, realizing clockwise and/or counterclockwise Work.

Claims (15)

1. Anti-swing directional manual screwdriver, characterized by including: A handle (1) having a torque applying portion and an axial bore (1A) inside, in which two separate bearing seats (1C, 1D) are arranged; A working rod (2), its front section has a working head (2A), its rear section extends into the inner hole (1A) of the handle (1) and is placed in the bearing seat (1C, 1D) by two The bearings (7A, 7B) on the upper support are also provided with a torque receiving part on the rear section; an orientation switch controllably disposed on said handle and positionable in at least two positions; The torque transmitting part is interposed between the torque applying part on the handle and the torque receiving part on the working rod and is controlled by the orientation conversion part, and the working state is converted according to the position change of the orientation conversion part. 2. The anti-swing directional manual screwdriver according to claim 1, characterized in that a cavity (1B) is arranged in the inner hole (1A) of the handle (1), and the torque applying part is formed on At least two pairs of first wedge-shaped surfaces (1E) and second wedge-shaped surfaces (1F) arranged in opposite directions and uniformly distributed in the circumferential direction on the inner surface of the cavity (1B), each pair of first wedge-shaped surfaces (1E) and second wedge-shaped surfaces The intersection of (1F) forms a free accommodation area (1G); The torque receiving portion is a cylindrical segment (2D) arranged on the working rod (2) corresponding to the first wedge-shaped surface (1E) and the second wedge-shaped surface (1F) of the cavity (1B); The orientation conversion part is a cage (3), which is sleeved on the working rod (2) and is located at the front end of the handle (1) to cover the cavity (1B). It has the same function as the first The logarithms of the wedge-shaped surface (1E) and the second wedge-shaped surface (1F) are the same and surround the through-limiting portion (3D) of the cylindrical section (2D) of the working rod (2); The torque transmitting member is a needle roller (4) having the same logarithm as that of the first wedge surface (1E) and the second wedge surface (1F), and the needle rollers (4) are placed in the cage ( 3), and the needle roller (4) is respectively bounded by the first wedge-shaped surface (1E) and the working rod along with the position conversion of the cage (3). between the cylindrical sections (2D) and between the second wedge-shaped surface (1F) and the cylindrical section (2D) of the working rod. 3. The anti-swing directional manual screwdriver according to claim 2, characterized in that the handle (1) comprises a body (11) and a sleeve-shaped part (12) fixedly connected to the body (11) , the cavity (1B) is formed on the sleeve-like component (12). 4. The anti-swing directional manual screwdriver according to claim 2 or 3, characterized in that the first wedge-shaped surface (1E) and the second wedge-shaped surface (1F) are curved surfaces and/or planes. 5. The anti-swing directional manual screwdriver according to claim 2, characterized in that the cage (3) and the handle (1) are respectively provided with a limit groove (1H) and a limit protrusion that cooperate with each other (32G). 6. The anti-swing directional manual screwdriver according to claim 2, characterized in that the cage (3) and the handle (1) are respectively provided with positioning slots (1J, 1K) and positioning pins ( 35), and a spring (36) is supported behind the positioning marble (35). 7. The anti-sway directional manual screwdriver according to claim 2, 3, 5 or 6, characterized in that said cage (3) includes a knob cover (31) covering said cavity (1B) And a shifting block (32) fixed together with the knob cover (31), the described penetration limiter (32D) is arranged on the shifting block (32). 8. The anti-sway directional manual screwdriver according to claim 2, characterized in that said cage (3) has a positioning surface (32F), and said working rod (2) is provided with a corresponding A shoulder (2F) that locates the surface (32F) and applies force to said cage (3) into the handle (1). 9. The anti-sway directional manual screwdriver according to claim 8, characterized in that the working rod (2) passes through the cage (3) and two bearings (7A, 7B) in sequence and connects one Nut (6) realizes positioning. 10. The anti-sway directional manual screwdriver according to claim 1, characterized in that the torque applying part is at least a pair of oppositely arranged first force application surfaces (1M) and second force application surfaces formed inside the handle. Two force application surfaces (1N); The torque receiving part is a ratchet (2G) arranged on the working rod (2); The orientation conversion part is a dial (37), which is located inside the handle corresponding to the first force application surface (1M) and the second force application surface (1N); The torque transmitting member is placed between the first force application surface (1M) and the ratchet (2G) and between the second force application surface (1N) and the ratchet (2G) The first ratchet (8A) and the second ratchet (8B), the ratchet is supported on the first force application surface (1M) and the ratchet (2G), the second force application surface (1N ) and the springs (9A, 9B) on the ratchet (2G), forming accommodation spaces (1P1, 1P2) inside the handle. 11. The anti-swing directional manual screwdriver according to claim 10, characterized in that the ratchet (2G) is in the shape of a gear, and the ratchet (8A, 8B) is provided with a The ratchet; the first force application surface (1M) and the second force application surface (1N) are planes or curved surfaces where the distance between the upper parts and the center of the ratchet (2G) changes from small to large, and the Corresponding slopes (8A1, 8B1, 37A, 37B) are provided on the shifting column (37) and ratchets (8A, 8B). 12. The anti-swing directional manual screwdriver according to claim 10, characterized in that the handle (1) comprises a body (11) and a sleeve-shaped part (12) fixedly connected to the body (11) , the first force application surface (1M) and the second force application surface (1N) are formed on the sleeve-like component (12). 13. The anti-swing directional manual screwdriver according to claim 12, characterized in that the working rod (2) passes through the knob cover (31), the sleeve-like component (12) and the two bearings ( 7A, 7B) and connect a nut (6) to achieve positioning. 14. The anti-swing directional manual screwdriver according to claim 10, 11, 12 or 13, characterized in that said dial (37) is set on a knob cover (31), and the knob cover (31) A positioning pin (12A) and a positioning pit (31D) cooperating with each other are respectively arranged on the handle and the handle, and a spring (12B) is supported behind the positioning pin (12A). 15. The anti-swing directional manual screwdriver according to claim 1, characterized in that the tail end of the handle (1) is connected with a detachable tail cap (5) that blocks the inner hole (1A).

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