CN2709090Y - Quick belt changer for band saws - Google Patents

Abstract

A band saw machine with quick band-changing device is prepared as setting a shaft base unit with a pivot component for connecting flywheel to shaft, setting a propping unit at top end of pivot component, setting a handle component at external of machine body, setting a cam component in coaxial linkage with handle component in machine body and a push-press component driven by cam component, setting lower end of push-press component to contact with propping unit of pivot component, using only one hand to pull handle component to control flywheel to be positioned at position of tensioned or loosened band saw easily.

Description

Quick belt changer for band saws

【Technical field】

The utility model relates to a band saw machine, in particular to a quick band changing device for the band saw machine.

【Background technique】

Referring to Fig. 1, a general band saw machine mainly has an upper flywheel 2, a lower flywheel 3 and an idler flywheel 4 inside a body 1, and a saw band 5 is wound around these flywheels 2, 3, 4, and the body 1 is provided with a motor 6 which can drive the lower flywheel 3. A working disk 7 is horizontally arranged in the center of the body 1. The saw band 5 can pass through the center of the working disk 7. A workpiece (not shown in the figure) can be provided on the working disk 7. ) is placed, and the workpiece can be pushed to the saw band 5 to start sawing. Since the saw band 5 will affect the sawing efficiency due to wear and passivation after being used for a period of time, the saw band 5 should be replaced regularly. In order to improve work efficiency, a band saw machine is usually equipped with a band changing device 10 to facilitate the band changing operation.

Referring to Fig. 2, generally the belt changing device 10 is arranged above the inside of the machine body 1, which includes a fixed seat 11 formed inside the machine body 1, a pivot member 12 slidingly arranged in the fixed seat 11, a screw connection A locking nut 13 at the upper end of the pivot member 12, a set of springs 14 arranged above the pivot member 12, and a locking member 15 elastically provided at the side of the pivot member 12, the pivot member 12 extends laterally. A shaft 121 is provided to fix the upper flywheel 2 so that the upper flywheel 2 can move up and down along with the pivot member 12. There is a base plate 111 above the fixing seat 11, and the pivot member 12 has a long rod 122 to move upward. Extending through the base plate 111, the pivot member 12 is provided with a wedge block 123 below the base plate 111. The latching piece 15 is pivotally connected to the body 1, and the wedge can be aligned by the elastic force of a torsion spring (not shown). The surface of the block 123 is in elastic contact, the lower end of the spring 14 resists the base plate 111, and the upper end springs against the locking nut 13, so that the entire pivot member 12 has an upward resilience force, so that the pivot member 12 can drive the upper The flywheel 2 moves upwards to tighten the saw band 5. When the user wants to replace the saw band 5, he only needs to press down on the locking nut 13, and the entire pivot member 12 can move downward, and the locking member 15 will automatically lock the saw band 5. Into the top surface of the wedge block 123 to form a clamp, thereby positioning the upper flywheel 2 and keeping it in the downward position, the saw band 5 is no longer supported by the upper flywheel 2 and is in a relaxed state, and the user can now adjust the saw band 5 Change action.

The above-mentioned belt changing device 10 can indeed achieve the general function of changing belts, but there is still room for improvement in use. When changing belts, the user needs to press down on the lock nut 13, and the lock nut 13 It is arranged at the top of the body 1. For users who are not tall enough, it is quite inconvenient to reach out and press down on the lock nut 13, and this position is not easy to apply force, especially the lock nut 13 is subject to The spring 14 has a strong upward elastic force, and the user has to press hard to overcome the elastic force, which is inconvenient to operate.

【Content of utility model】

The purpose of the utility model is to provide a quick band changing device for a band saw machine which can quickly and conveniently change the saw band.

The utility model provides a fast band changing device for a band saw machine. The band saw machine has a machine body, two flywheels whose shafts are arranged at the upper and lower positions inside the machine body, and a saw band wound around the two flywheels. The belt changing device is characterized in that: comprising

A shaft seat unit, which has a pivot member arranged inside the body and can move up and down, a locking member locked on the upper end of the pivot member, and an elastic locking member to provide the pivot member with upward resilience A component, the front of the pivot member is provided with a shaft for the upper flywheel to be pivotally connected to, and its back has a stop at the top edge; and

A control unit has a handle with a shaft outside the body, a cam inside the body that coaxially moves with the handle, and a pusher that is slid inside the body and can be driven by the cam. The outer periphery of the cam member has a long diameter portion and a short diameter portion. The upper end of the pushing member is in abutting contact with the above-mentioned part of the cam member, and the lower end is abutted against the resisting portion of the pivot member.

The quick belt changing device for a band saw machine is characterized in that the pushing member has a flange, and the flange is hooked against a spring that keeps the pushing member in contact with the outer periphery of the cam member.

The quick band changing device for the band saw machine is characterized in that: the side circumference of the handle has a first marking part and a second marking part, the first and second marking parts are respectively the In the relaxed position, the outer circumference of the handle is just aligned with the angular position of the operator's eyes.

The quick belt changing device of the band saw machine of the utility model has a shaft seat unit and a control unit. The locking part and a resilient locking part provide an elastic element with an upward elastic force for the pivot part. The front side of the pivot part is provided with a shaft for the upper flywheel to be pivotally connected to. The control unit has a handle set at a predetermined position outside the machine body, a cam set inside the machine body and coaxially interlocking with the handle, and a slidably set inside the machine body that can be driven by the cam. The push piece has a long diameter portion and a short diameter portion on the outer periphery of the cam piece. The upper end of the push piece can be in contact with the above-mentioned part of the cam piece, and the lower end can be pushed against the stop portion of the pivot piece to form a linkage. .

The effect of the utility model is to provide the user with the ability to control the flywheel to move up and down at the side of the body, so as to achieve the effects of quick belt change and convenient operation.

【Description of drawings】

The following is a detailed description of the quick belt changing device of the band saw machine of the present invention through the best embodiment and the accompanying drawings. In the accompanying drawings:

Figure 1 is a combination diagram of a general band saw machine, illustrating that a belt changing device is provided inside the machine body to control the displacement of the upper flywheel;

Fig. 2 is the combination diagram of above-mentioned band saw machine band changing device;

Fig. 3 is an exploded perspective view of a preferred embodiment of the quick belt changing device of the band saw machine of the present invention, illustrating that the utility model includes a shaft seat unit and a control unit, and the shaft seat unit has a pivot member for the upper flywheel as Axial linkage, the control unit has a handle and a cam for coaxial linkage;

Fig. 4 is a combined plan view of the above-mentioned preferred embodiment, illustrating that the cam part of the control unit is in contact with a push part through a short diameter part, and the pivot part and the upper flywheel spring and move up, so that the saw band is in a tensioned state;

Fig. 5 is a sectional view along line 5-5 of Fig. 4;

Fig. 6 is an appearance view of the back of the body of the above-mentioned preferred embodiment, illustrating that the handle of the control unit is turned to the right position, and the angle is just enough to make the first marking part face the front of the body for the user to view;

Fig. 7 is an action diagram of the above-mentioned preferred embodiment, illustrating that the cam part of the control unit is in contact with the pushing part through the long diameter part, and the pushing part drives the pivot part and the upper flywheel to move down, so that the saw band is in a relaxed state;

Figure 8 is a cross-sectional view along line 8-8 of Figure 7; and

9 is an appearance view of the back of the body of the above-mentioned preferred embodiment, illustrating that the handle of the control unit is turned to the left position, and the angle is just enough to make the second marking part face the front of the body for users to view.

【Detailed ways】

The foregoing and other technical contents, features and effects of the present invention will be clearly understood in the following detailed description of a preferred embodiment with reference to the drawings.

Referring to Fig. 3 and Fig. 4, under a preferred embodiment of the quick belt changing device of the band saw machine of the present invention, the band saw machine 20 has a body 21 and two shafts respectively arranged at the upper and lower positions inside the body 21. Flywheel 22 and a saw band 23 wound around the second flywheel 22, the upper part of the body 21 has a chute seat 211, a plurality of threaded columns 212 protrude around the chute seat 211, and the lower cover plate 24 is surrounded by The threaded screws 241 can be locked and fixed on the threaded columns 212. The lower cover plate 24 has a long hole 242 in the center and is hollowed out. The body 21 has a receiving seat 213 above the chute seat 211. The receiving seat 213 has a spring groove 214 at the center, and several screw posts 215 protrude around the receiving seat 213. An upper cover plate 25 penetrates several screws 251 and is fixed on the screw posts 215. The top edge of the upper cover plate 25 is concavely bent with a retaining portion 252, and the center of the retaining portion 252 has a perforation 253. The inner wall of the body 21 is located above the receiving seat 213 and is pierced with a shaft hole 216. The technology of the utility model The focus is on the quick belt change device, which mainly includes a shaft seat unit 30 and a control unit 40, and then the shapes and combinations of the above-mentioned components will be described in detail later.

Referring to Fig. 5 at the same time, the shaft seat unit 30 has a pivot member 31 that is slidably arranged in the chute seat 211 of the body 21 and can move up and down, a locking member 32 locked on the upper end of the pivot member 31, and a The spring-locking part 32 provides the pivot part 31 with an elastic element 33 with an upward elastic force. The front side of the pivot part 31 is provided with a shaft 311, and the shaft 311 passes through the long hole 242 of the lower cover plate 24 to Connect with the upper flywheel 22 so that the upper flywheel 22 and the pivot member 31 can be displaced synchronously. The back of the pivot member 31 has a stopper 312 at the top edge, and a long rod 313 extends above the pivot member 31. The long rod 313 passes through the perforation 253 of the upper cover plate 25 upwards and protrudes outside the body 21. There is a knob 321 above the locking member 32 for hand rotation, and its lower end is screwed to the upper end of the long rod 313. The elastic The element 33 is a compression spring, which is sleeved on the long rod 313, and the lower end resists the stopper 252 of the upper cover plate 25, and the upper end springs against the locking member 32 to provide the entire pivot member 31 with an upward resilience force. And the size of the elastic restoring force can be adjusted by screwing the locking member 32 .

Referring to Fig. 6 at the same time, the control unit 40 has a handle member 41 that is arranged at a predetermined position outside the body 21, a cam member 42 that is coaxially interlocked with the handle member 41 inside the body 21, and a slider. The pushing member 43 which is set in the accommodation seat 213 of the machine body 21 and can be driven by the cam member 42, the handle member 41 protrudes inwardly, and a shaft part 411 can be inserted into the shaft hole 216, and one side of the outer circumference protrudes There is a handle 412 that can be turned by the user's hand. In addition, there is a first marking part 413 and a second marking part 414 at a predetermined position. The first and second marking parts 413, 414 are a kind of user Figures that are easy to understand and identify, wherein the first marking part 413 expresses the pattern of the saw band 23 in the tensioned position, and the second marking part 414 expresses the pattern of the saw band 23 in the relaxed position. The outer circumference of the cam member 42 has a long The diameter portion 421 and a short diameter portion 422 have a bolt hole 423 in the center, and the bolt hole 423 can be used for the shaft portion 411 of the handle member 41 to be fitted and bolted, and the cam member 42 is inserted into a set screw 44 to fix the handle member 41. Connect, so that the handle part 41 can drive the cam part 42 to rotate, the push part 43 can move up and down in the accommodating seat 213, and its upper end has an arc-shaped arc guide edge 431, and the arc guide edge 431 can be connected with the cam The above-mentioned long diameter part 421 or short diameter part 422 of the part 42 is used for abutting contact, and the lower end of the pushing part 43 has a rectangular actuating end 432, which can be abutted against the abutment of the pivot part 31. On the stop portion 312, a flange 433 is punched and recessed on the back of the push piece 43, and the flange 433 can be hooked by a spring 45. The spring 45 is just placed in the spring groove 214 and can bounce against the push piece. 43 is kept in contact with the outer periphery of the cam member 42 .

The above is an overview of the shape of each component and the combined space of the quick belt changing device of the band saw machine of the present invention. Then, the belt changing action of the present invention and the expected effect are stated as follows:

Referring to Fig. 7, Fig. 8, and Fig. 9, when the user wants to replace the saw band 23, firstly, the handle 41 is turned counterclockwise to the left position, and the angle at which the handle 41 is turned is just Let the second marking part 414 be directly facing the height position of the user's eyes, so that the user can clearly distinguish that the saw band 23 is in a relaxed state, and the handle 41 will drive the cam 42 to rotate, and the cam 42 will The long-diameter portion 421 protrudes against the push piece 43, and the push piece 43 is pressed down again to drive the pivot piece 31 to move downward, and the entire upper flywheel 22 is positioned at the pressed position, and the saw band 23 is no longer supported by the upper flywheel 22. And in a loose shape, the user can smoothly perform the belt changing operation.

Referring again to Fig. 4, Fig. 5, and Fig. 6, after the saw band 23 is replaced with a new one, to return the saw band 23 to the tensioned state, the user pushes and turns the handle 41 to the right side in a clockwise direction. , the handle member 41 drives the cam member 42 to rotate so that the short diameter portion 422 contacts the push member 43, and the push member 43 no longer presses down on the pivot member 31. At this time, the angle after the handle member 41 rotates is just to let the first marking part 413 is directly facing the height position of the user's eyes, so that the user can clearly distinguish that the saw band 23 is in a tensioned state, and the pivot member 31 is moved upward due to the elastic force of the elastic element 33, and the entire upper flywheel 22 can go up and this saw band 23 is done tight.

To sum up, the quick belt changing device of the band saw machine of the present invention is mainly to solve the problem of changing bands of the general band saw machine. The technical means used in the present invention is to allow the user to easily A control unit 40 is provided at the control position, and the control unit 40 is provided with a handle 41 outside the body 21, and a cam 42 which is interlocked with the handle 41 is arranged inside the body 21, and the user only needs to turn the handle With the action of piece 41, the cam piece 42 can be driven to control the flywheel 22 inside the body 21 to move up and down, so that the saw band 23 is in a tight or loose state. Therefore, the operation of the belt changing operation of the utility model is simple. It can be operated and is very convenient to use, and the height of the handle 41 is set at a position that is convenient for the user to move by hand, so the operation is quite easy and labor-saving, and the belt changing operation can be completed quickly and efficiently. In addition, the handle 41 The outer periphery has a first marking part 413 and a second marking part 414, and the user standing in front of the machine body 21 can identify the current position of the saw band 23 at a glance, so that the utility model has the indication effect of clearly identifying the working position of the belt changing.

Claims (3)

1. the quick band-exchange device of a band sawing machine, this band sawing machine have a body, two respectively axle be located at the flywheel and the saw band of a winding on two flywheels at internal body upper-lower position place, this quick band-exchange device is characterised in that: comprise

One axle bed unit, having one is arranged on internal body pivot member movable up and down, an interlocking closure and the butted closure in the pivot member upper end and provides pivot member to have the upwards flexible member of spring-go power, this pivot member front is stretched and is provided with an axostylus axostyle and keeps supplying flywheel and be coupling, and its back side has a stop section at upper edge; And

One control module, having a handle member, that is located at engine body exterior is arranged on internal body and handle member and makes the cam member and of coaxial interlock and be slidingly installed in internal body and can be subjected to the thrust piece that cam member drives, this cam member periphery has a length-diameter part and a minor axis portion, this thrust piece upper end contacts as contact with the above-mentioned position of this cam member, and the lower end is contact pivot member stop section then.

2. the quick band-exchange device of band sawing machine as claimed in claim 1, it is characterized in that: this thrust piece has a flange, and this flange hook supports and is provided with a spring that thrust piece and cam member periphery are kept in touch.

3. the quick band-exchange device of band sawing machine as claimed in claim 1, it is characterized in that: this handle member side week locates to have one first sign portion and one second sign portion, first, second sign portion be respectively saw band under stretching/slack position state, the handle member periphery just is aligned with operator's eye and sees the angle position look.

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