TWI704981B - Ratchet wrench - Google Patents

Abstract

The present invention is a ratchet wrench, including a head. The head is built-in with a ratchet, a forward detent group, a reverse detent group, and a reversing element. By switching the reversing element, the forward detent group and the reverse detent The movable group abuts against the ratchet wheel. When the ratchet wheel is rotated, the detent blocks contained in the detent group against the ratchet wheel alternately bite the ratchet wheel to reduce the necessary swing angle of the ratchet wrench.

Description

Ratchet wrench

The invention is a ratchet wrench, which is used for reciprocatingly pulling a locking screw.

Ratchet wrenches can be roughly divided into the form of a ratchet wheel with an opening, such as Taiwan Patent I647072, or a form where the ratchet wheel has a sleeve connecting part to connect the sleeve, such as Taiwan Patent M576088. The more the number of teeth of the ratchet, the smaller the necessary swing angle of the wrench, which is conducive to the construction of narrow areas. However, the number of teeth that can be set in a ratchet is limited by the size of the ratchet. The common number of teeth is mostly 72 teeth, and the necessary swing angle of a wrench is 5 degrees. With the development of science and technology, the smaller and smaller the items, the more various appliances are installed. Increasing squeeze, there is an increasing demand for ratchet wrenches with a smaller swing angle. If you want to reduce the swing angle, you must continue to increase the number of teeth. However, increasing the number of teeth without changing the size of the ratchet will reduce the gear teeth. Therefore, if the size of the ratchet is increased, the wrench cannot be constructed in a narrow space. How to further reduce the necessary swing angle of the ratchet wrench without changing the size of the ratchet and the number of teeth is a problem that needs to be solved.

The structure of the invention can further reduce the necessary swing angle of the ratchet wrench without changing the size of the ratchet wheel and without increasing the number of gear teeth.

In order to achieve the above objectives and effects, the present invention provides a ratchet wrench, which includes: a body, the opposite ends of which are respectively a head and a handle, the head has an accommodating groove, and the accommodating groove further penetrates a wheel shaft Perforation and a reversing perforation; a ratchet wheel, the ratchet wheel has a wheel portion, the ratchet wheel is pivoted on the axle of the head, the wheel portion is located inside the accommodating groove, the circumferential side ring of the wheel portion is provided with a plurality of gear teeth; A forward detent group, which is located in the accommodating groove and assembled with the accommodating groove, the forward detent group includes a first detent block and a second detent block, the first detent block One end is set in the accommodating groove and the other end has a plurality of first teeth corresponding to the plurality of gear teeth, the second detent block is set at one end of the accommodating groove and the other end has a plurality of second teeth corresponding to the plurality of gear teeth To bite the teeth, the first and second detent blocks respectively and the groove wall of the corresponding accommodating groove each spring against a positive elastic member; a reverse detent group, which is located in the accommodating groove and Pivotly connected to the accommodating slot, the reverse detent assembly includes a third detent block and a fourth detent block. One end of the third detent block is set in the accommodating groove and the other end has a corresponding plurality A plurality of third teeth of the gear teeth, one end of the fourth detent block is assembled in the accommodating groove and the other end has a plurality of fourth teeth corresponding to the plurality of teeth, the third detent block and the fourth detent There is a reverse elastic member that springs between the movable block and the wall of the corresponding accommodating groove; and a reversing member having a rod and a handle connected to each other, and the reversing member is pivoted by the rod In the reversing perforation, the rod is located between the forward and reverse actuation sets, and the handle is exposed outside the head. Pull the handle to drive the rod to control the forward direction One of the detent group and the reverse detent group abuts against the ratchet, and the other is pressed by the lever and there is a gap between the ratchet, so that when the ratchet rotates forward and backward, the plural first The bite teeth and the plurality of second bite teeth alternately mesh with the corresponding gear teeth, and the plurality of third bite teeth and the plurality of fourth bite teeth alternately mesh with the corresponding gear teeth.

In this embodiment, the ratchet wheel has a sleeve connecting part as an example. The first to second figures show a ratchet wrench, which includes a body 1 whose opposite ends are a head 2 and a handle 3, respectively. The head 2 has an accommodating groove 21, the accommodating groove 21 further penetrates an axle hole 225 and a reversing hole 226; a ratchet 4, the ratchet 4 has a wheel portion 41, the ratchet 4 is pivoted on the head 2 The wheel shaft is perforated 225, the wheel portion 41 is located inside the accommodating groove 21, the circumferential side of the wheel portion 41 is provided with a plurality of gear teeth 52; a positive detent group 5, which is located in the accommodating groove 21 and assembled In the accommodating slot 21, the forward detent assembly 5 includes a first detent 51 and a second detent 52. One end of the first detent 51 is arranged in the accommodating slot 21 and the other end There is a plurality of first teeth 511 corresponding to the plurality of gear teeth 42. The second detent block 52 is provided with the accommodating groove 21 at one end and has a plurality of second teeth 522 corresponding to the plurality of gear teeth 42 at the other end. A detent block 51 and the second detent block 52 respectively spring against the wall of the corresponding accommodating groove 21 with a positive elastic member 53; a reverse detent assembly 6 located in the accommodating groove 21 And pivotally connected to the accommodating slot 21, the reverse detent assembly 6 includes a third detent block 61 and a fourth detent block 62, one end of the third detent block 61 is set in the accommodating slot 21 The other end has a plurality of third teeth 611 corresponding to the plurality of gear teeth 42. One end of the fourth detent block 62 is assembled in the accommodating groove 21 and the other end has a plurality of fourth teeth corresponding to the plurality of gear teeth 42 622. The third and fourth detent blocks 61 and 62 respectively and the groove wall of the corresponding accommodating groove 21 each spring against a reverse elastic member 63; and a reversing member 7 having mutually connected A rod portion 71 and a handle portion 72, the reversing member 7 is pivoted to the reversing through hole 226 with the rod portion 71, and the rod portion 71 is located between the forward detent assembly 5 and the reverse detent assembly 6 At the same time, the handle 72 is exposed outside the head 2, and pull the handle 72 to drive the rod 71 to control one of the forward detent group 5 and the reverse detent group 6 to abut against the ratchet 4, and the other is due to the gap between the rod 71 and the ratchet wheel 4, so that when the ratchet wheel 4 rotates forward and backward, the plurality of first teeth 511 and the plurality of second teeth 511 correspond to The gear teeth 42 alternately bite, and the plurality of third bite teeth 611 and the plurality of fourth bite teeth 622 alternately bite with the corresponding gear teeth 42 respectively.

When the forward detent group 5 abuts the ratchet wheel 4 and there is a gap between the reverse detent group 6 and the ratchet wheel 4, the ratchet wheel 4 cannot rotate in the reverse direction. At this time, the ratchet wheel 4 is rotated in the forward direction. The detent group 5 is moved by the corresponding gear teeth 42, the plural first bite teeth 511 and the plural second bite teeth 522 alternately engage with the corresponding gear teeth 42, respectively, the reverse detent group abuts the ratchet wheel 4 and When there is a gap between the forward detent group 5 and the ratchet wheel 4, the ratchet wheel 4 cannot rotate forward. At this time, the ratchet wheel 4 is rotated in the reverse direction, and the reverse detent group 6 is moved by the corresponding gear teeth 42, and the The plurality of third bite teeth 611 and the plurality of fourth bite teeth 622 alternately engage with the corresponding gear teeth 42 respectively. The situation in which the forward detent group 5 abuts against the ratchet wheel 4 and operates can be illustrated in conjunction with the third and fourth figures. When the plural first bite teeth 511 are engaged with the corresponding gear teeth 42, the plural second bite teeth 522 are partially attached to the corresponding gear teeth 42, and when the plural second bite teeth 522 are engaged with the corresponding gear teeth 42, the plural first teeth The 511 part is attached to the corresponding tooth 42, which makes the rotation process of the ratchet 4 more stable. The operation mode of the reverse detent group 6 is the mirror image of the forward detent group 5. With this structure, the necessary swing angle of the ratchet wrench is halved For example, the number of teeth 42 in this embodiment is seventy-two teeth, and the necessary swing angle is 2.5 degrees, which is only half of the conventional structure, and the forward detent group 5 and the reverse detent group 6 are each responsible The structure of the ratchet wheel 4 is one of the steering mechanism, and its product life is longer than that of the conventional ratchet wrench relying solely on a set of actuators and the ratchet wheel.

The outer circumference of the rod portion 71 has a positive abutment surface 711, a negative abutment surface 712, and a pressure surface 713. One of the forward detent group 5 and the reverse detent group 6 is pressed by the There is a gap between the surface 713 and the ratchet wheel 4. When the plurality of first bite teeth 511 engage with the corresponding gear teeth 42, the first detent block 51 abuts against the positive abutment surface 711, and the plurality of When the second bite tooth 522 is engaged with the corresponding gear tooth 42, the second detent block 52 abuts against the positive abutment surface 711, so that when the ratchet wheel 4 is rotated forward, the first detent block 51 and the second The detent block 52 abuts against the positive abutment surface 711 alternately. When the plurality of third bite teeth 611 engage with the corresponding gear teeth 42, the third detent block 61 abuts against the opposite abutment surface 712, When the fourth bite teeth 622 engage with the corresponding gear teeth 42, the fourth detent block 62 abuts against the anti-abutment surface 712, so that when the ratchet wheel 4 is rotated in the reverse direction, the third detent block 61 and the fourth The detent block 62 alternately abuts on the anti-abutment surface 712. The operation of the forward detent group 5 is shown in Figures 3 and 4. The operation mode of the reverse detent group 6 is the mirror image of the forward detent group 5. , The structure of each abutment surface enables the bite teeth of each detent group to engage with the gear teeth 42 to provide the detent group to resist and achieve a more stable occlusion.

A structure with a pivot position for each switch set is provided. As shown in the second, third, and seventh figures, the groove wall 22 of the accommodating groove 21 includes a ring wall portion 221 and a side wall portion 224, and the ring wall portion 221 surrounds the The wheel 41, the forward detent assembly 5, and the reverse detent assembly 6, the axle through hole 225 and the reversing through hole 226 are located on the side wall 224, and the ring wall 221 is recessed with two long grooves 222 at intervals, each The long groove 222 defines a center A, and each center A extends toward the edges of the two side grooves of the corresponding long groove 222 with an imaginary line B and an imaginary line C. The imaginary line B and the imaginary line C and the inner wall of the corresponding long groove 222 have a A fan shape with a central angle D, the central angle D is greater than 180 degrees, the first and second detent blocks 51 and 52 are pivotally connected to one of the long grooves 222 at one end, the third and fourth detent blocks 61 and One end of the detent block 62 is pivotally connected to the other long groove. This structure makes the detent blocks easy to install and not easy to fall off.

A structure with a pivoting position for each switch set is provided. As shown in the fifth figure, the groove wall 22 of the accommodating groove 21 includes a ring wall portion 221 and a side wall portion 224. The ring wall portion 221 surrounds the wheel portion 41, The forward detent assembly 5 and the reverse detent assembly 6, the axle hole 225 and the reversing hole 226 are located on the side wall portion 224, and the side wall portion 224 has a first slotted shaft hole 227 and a second slotted shaft Hole 228, and another cover 8 is disposed in the slot of the accommodating groove 21. The cover 8 has a first cover shaft hole 81 and a second cover shaft hole 82 facing one side of the accommodating groove 21, The first detent block 51 is pivotally connected to the first cover shaft hole 81, the second detent block 52 is pivotally connected to the first slot shaft hole 227, and the third detent block 61 is pivotally connected to the second cover A shaft hole 82, the fourth detent block 62 is pivotally connected to the second slotted shaft hole 228.

One type of each elastic member is provided. As shown in the second figure, the ring wall portion 221 corresponds to the forward detent assembly 5 with a first retaining groove 2211, and the annular wall portion 221 corresponds to the reverse detent assembly 6 The part has a second clamping groove 2212, and each positive elastic member 53 is in a spiral shape and connected to each other at one end to form a first connecting group part 54 which is clamped in the first groove 2211, and each The reverse elastic members 63 are in a spiral shape and are connected to each other at one end to form a second connecting portion 64, and the second connecting portion 64 is clamped in the second groove 2212.

One type of elastic element is provided. As shown in the third and sixth figures, the ring wall portion 221 corresponding to the forward detent assembly 5 has a first retaining groove 2211, and the ring wall portion 221 corresponds to the reverse detent movement. The group 6 has a second clamping groove 2212, and each positive elastic member 53 is in the form of an elastic sheet and connected to each other at one end to form a first group part 54 which is clamped in the first clamping groove 2211 Each of the reverse elastic members 63 is in the form of elastic pieces and is connected to each other at one end to form a second connecting group portion 64, and the second connecting group portion 64 is locked in the second groove 2212.

One type of bite is provided, wherein the first bite 511 and the second bite 522 are misaligned with each other, and the third bite 611 and the fourth bite 622 are misaligned to make the first bite When the 511 and the second bite 522 or the third bite 611 and the fourth bite 622 alternately engage the corresponding gear teeth 42, the alternation can be smoother.

1: body 2: head 21: holding tank 22: groove wall 221: Ring Wall 2211: first card slot 2212: second card slot 222: Long Ditch 224: side wall 225: Axle perforation 226: Reversing perforation 227: first slot shaft hole 228: second slot shaft hole 3: Handle 4: ratchet 41: Wheel 42: gear teeth 5: Positive control group 51: The first moving block 511: first bite 52: The second moving block 522: second bite 53: Positive elastic part 54: First company group department 6: Reverse control group 61: The third moving block 611: third bite 62: The fourth moving block 622: The fourth bite 63: reverse elastic 64: The second company team 7: Reversing piece 71: pole 711: positive contact surface 712: anti-abutment surface 713: pressure surface 72: handle 8: cover 81: first cover shaft hole 82: second cover shaft hole A: Center of circle B: imaginary line C: hypothetical D: central angle

The first figure is a perspective view of the present invention. The second figure is an exploded view of the present invention. The third figure is a schematic diagram of the first bite teeth engaging the corresponding teeth of the present invention. The fourth figure is a schematic diagram of the second bite teeth engaging the corresponding gear teeth of the present invention. The fifth figure is a schematic diagram of another embodiment of the groove wall. The sixth figure is a schematic diagram of another embodiment of the forward elastic member and the reverse elastic member. The seventh figure is a partial enlarged view of the third figure.

1: body

2: head

21: holding tank

22: groove wall

221: Ring Wall

2211: first card slot

2212: second card slot

222: Long Ditch

224: side wall

225: Axle perforation

226: Reversing perforation

3: Handle

4: ratchet

41: Wheel

42: gear teeth

5: Positive control group

51: The first moving block

511: first bite

52: The second moving block

522: second bite

53: Positive elastic part

54: First company group department

6: Reverse control group

61: The third moving block

611: third bite

62: The fourth moving block

622: The fourth bite

63: reverse elastic

64: The second company team

7: Reversing piece

71: pole

72: handle

8: cover

Claims (6)

A ratchet wrench includes: a body, the opposite ends of which are respectively a head and a handle, the head has an accommodating groove, and the accommodating groove further penetrates an axle hole and a reversing hole; a ratchet, The ratchet wheel has a wheel part, the ratchet wheel is pivoted on the wheel shaft of the head, the wheel part is located in the accommodating groove, and the peripheral side ring of the wheel part is provided with a plurality of gear teeth; a positive detent group is located in the The accommodating groove is assembled and connected to the accommodating groove, and the forward detent group includes a first detent block and a second detent block, one end of the first detent block is assembled in the accommodating groove and the other One end has a plurality of first teeth corresponding to a plurality of gear teeth, one end of the second detent block is provided with the accommodating groove, and the other end has a plurality of second teeth corresponding to a plurality of teeth, the first detent block and Each of the second detent blocks and the groove wall of the corresponding accommodating groove has a positive elastic member; a reverse detent group is located in the accommodating groove and is pivotally connected to the accommodating groove. The directional detent assembly includes a third detent block and a fourth detent block. One end of the third detent block is set in the accommodating groove and the other end has a plurality of third teeth corresponding to the plurality of teeth. One end of the fourth detent block is arranged in the accommodating groove and the other end has a plurality of fourth teeth corresponding to the plurality of gear teeth. The third detent block and the fourth detent block respectively correspond to the grooves of the accommodating groove There is a reverse elastic member each springing against the walls; and a reversing member having a rod and a handle connected to each other. The reversing member is pivoted to the reversing through hole by the rod, and the rod is located at Between the forward detent group and the reverse detent group, the handle is exposed outside the head, pull the handle to drive the rod to control the forward detent group and the reverse detent group One of them abuts against the ratchet, and the other has a gap between the rod and the ratchet, so that when the ratchet rotates forward and backward, the plurality of first teeth and the plurality of second teeth are respectively Alternately mesh with the corresponding gear teeth, and the plurality of third bite teeth and the plurality of fourth bite teeth alternately mesh with the corresponding gear teeth; Wherein the outer circumference of the rod portion has a positive abutment surface, a negative abutment surface and a pressure surface. One of the forward and reverse deflection sets is pressed by the pressure surface and There is a gap between the ratchet wheels. When the plurality of first bite teeth engage with the corresponding gear teeth, the first detent block abuts against the positive abutment surface, and when the plurality of second bite teeth engage with the corresponding teeth, The second detent block abuts against the positive abutment surface, so that when the ratchet is rotated forward, the first detent block and the second detent block alternately abut against the positive abutment surface, and the plural third bites When the teeth are engaged with the corresponding gear teeth, the third detent block abuts against the anti-abutment surface, and when the plurality of fourth bite teeth are engaged with the corresponding gear teeth, the fourth detent block abuts against the anti-abutment surface Against the surface, so that when the ratchet wheel is rotated in the reverse direction, the third detent block and the fourth detent block alternately abut on the anti-abutment surface. For the ratchet wrench described in item 1 of the scope of patent application, the groove wall of the accommodating groove includes a ring wall portion and a side wall portion, the ring wall portion surrounds the wheel portion, the forward detent group and the reverse To move the group, the axle hole and the reversing hole are located on the side wall part, the ring wall part is recessed with two long grooves, each long groove defines a circle center A, and each circle center A extends toward the edge of the two sides of the corresponding long groove. An imaginary line B and a imaginary line C. The imaginary line B and the imaginary line C and the inner wall of the corresponding long groove form a fan shape with a central angle D, the central angle D is greater than 180 degrees, the first detent block and the second Two detent blocks are pivotally connected to one of the long grooves at one end, and the third detent block and the fourth detent block are pivoted to the other long groove at one end. For the ratchet wrench described in item 1 of the scope of patent application, the groove wall of the accommodating groove includes a ring wall portion and a side wall portion, the ring wall portion surrounds the wheel portion, the forward detent group and the reverse To move the set, the axle hole and the reversing hole are located on the side wall portion, the side wall portion has a first slotted shaft hole and a second slotted shaft hole, and a cover is arranged on the slot of the accommodating slot , The cover has a first cover shaft hole and a second cover shaft hole on one side of the containing groove, the first detent block is pivoted to the first cover shaft hole, and the second detent block pivots Connected to the first slot shaft hole, the third detent block is pivoted to the second cover shaft hole, and the fourth detent block is pivoted to the second slot shaft hole. For example, the ratchet wrench described in item 2 or item 3 of the scope of the patent application, wherein the ring wall portion corresponding to the forward detent group has a first locking groove, and the ring wall portion corresponds to the reverse detent group The part has a second locking groove, each of the forward elastic members is in a spiral shape and is connected to each other at one end to form a first series part, the first series part is clamped in the first locking groove, and each reverse elastic part is spiral It is connected to each other at one end to form a second connecting group part, and the second connecting group part is clamped in the second clamping groove. For example, the ratchet wrench described in item 2 or item 3 of the scope of the patent application, wherein the ring wall portion corresponding to the forward detent group has a first locking groove, and the ring wall portion corresponds to the reverse detent group The part has a second locking groove, each of the positive elastic pieces is in the form of elastic pieces and is connected to each other at one end to form a first series part, the first series part is clamped in the first groove, and each reverse elastic part is an elastic piece It is connected to each other at one end to form a second connecting group part, and the second connecting group part is clamped in the second clamping groove. In the ratchet wrench as described in item 1 of the scope of patent application, the first plurality of teeth and the second plurality of teeth are misaligned, and the third and fourth teeth are misaligned.

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