TWI774431B - Compound Nut Wrench - Google Patents

Abstract

A composite nut wrench includes a handle and a latching head, the latching head has a base, a first latching part, and a second latching part, the base has a first contact surface and a second abutting surface, the first latching portion is protruding on the first abutting surface, and has a plurality of first latching blocks, each first latching block has a first inclined surface, and the second latching portion protrudes It is arranged on the second contact surface and has a second latching block, the second latching block has a second inclined surface, and the latching head has a first latching part and a second latching part with different latching forms , to improve the convenience of use.

Description

Compound Nut Wrench

The present invention relates to a nut wrench, in particular to a compound nut wrench suitable for connecting to a nut of a cutter bar.

The existing wrench is mainly used to turn the nut to lock or remove the nut. When the existing wrench is used to remove the nut connected to the tool shank, the tool shank can be connected to different types of tools, such as drills, milling cutters. , chamfering knives, etc. When the cutter head of the cutter connected to the cutter bar is too large, it will block the existing socket-type wrench, so that the socket-type existing wrench cannot be socketed on the nut, and must be replaced with another type. Only the existing wrench can disassemble or lock the nut connected to the cutter shank.

In addition, there are many kinds of nuts, one of which is used to connect to the shank. The outer periphery of the nut is concave with a plurality of grooves, and each groove has a groove slope, and the groove slope is away from the end face of the nut. The end edge extends obliquely inward toward the end face. Due to the influence of the inclined surface of the groove of the nut, the existing wrench cannot be firmly clamped in the groove of the nut, so that the existing wrench cannot rotate the nut. In the process of removing the cap, it is easy to separate from the screw cap, and needs to be improved.

In view of this, the main purpose of the present invention is to provide a composite nut wrench, which has two different styles of latches, and is suitable for disassembling or locking a nut with a grooved slope.

The composite nut wrench of the present invention comprises: a handle; and a latching head, the latching head is formed at one end of the handle, and the latching head includes a central axis; a base, the base is C-shaped around the central axis, and has a first abutting surface and a second abutting surface respectively located on opposite sides; a first latching part, the first latching part is protruding from the The first abutting surface of the base includes a first surrounding part, the first surrounding part is C-shaped and protrudes from the first abutting surface of the base, the first surrounding part has a first opening; and a plurality of a first locking block, the first locking blocks are protrudingly disposed on the inner side of the first surrounding part, and are arranged at intervals in a ring shape, each first locking block has a first inclined surface, and the first inclined surface is located away from the One side of the first surrounding portion gradually approaches the first surrounding portion from the first abutting surface of the base toward the direction away from the first abutting surface; and a second locking portion, the second locking portion is protruding on the second abutting surface of the base, and includes a second surrounding portion, the second surrounding portion is C-shaped and protruding on the second abutting surface of the base, the second surrounding portion has a second opening; and a second latching block, the second latching block protrudes from the inner side of the second surrounding portion and is adjacent to an edge of the second opening, the second latching block has a second inclined surface, the second inclined surface is located away from One side of the second surrounding portion gradually approaches the second surrounding portion from the second abutting surface of the base toward the direction away from the second abutting surface.

Utilize the above-mentioned technical features, the composite nut wrench of the present invention has the following efficacy gains:

1. Since the latching head forms the first latching part and the second latching part with different latching forms, the user can choose to use the first latching part or the second latching part according to the style of the tool connected to the tool bar Remove or lock the nut to improve the convenience of use.

2. Each first latching block has a first inclined surface, and the second latching block has a second inclined surface, which is suitable for a nut with a groove inclined surface, and can lift each first latching block and the second latching surface. The locking stability and the locking strength of the locking block and the groove of the nut.

10: Grip

20: Card head

21: Base

211: The first contact

212: The second contact

23: The first latch

231: First Surrounding Department

232: First Opening

233: The first locking block

234: First Bevel

25: The second latch

251: Second Surrounding Department

252: Second Opening

253: The second locking block

254: Second Bevel

255: Support block

50: Nut

52: Groove

522: Groove Bevel

A: Center axis

D1: Vertical length

D2: Straight line distance

D3: Straight line distance

θ 1: included angle

θ 2: included angle

FIG. 1 is a three-dimensional appearance view of a preferred embodiment of the present invention.

FIG. 2 is another three-dimensional appearance view of the preferred embodiment of the present invention.

3 is a front cross-sectional view of the preferred embodiment of the present invention.

4 is a side cross-sectional view of the preferred embodiment of the present invention.

FIG. 5 is a schematic three-dimensional appearance view of the use of the second locking portion according to the preferred embodiment of the present invention.

FIG. 6 is a schematic exploded perspective view of the use of the second locking portion according to the preferred embodiment of the present invention.

FIG. 7 is a schematic top sectional view of the use of the second locking portion according to the preferred embodiment of the present invention.

FIG. 8 is a schematic front cross-sectional view of the second latching portion in use according to the preferred embodiment of the present invention.

FIG. 9 is a schematic three-dimensional appearance view of the use of the first locking portion according to the preferred embodiment of the present invention.

FIG. 10 is a schematic exploded perspective view of the use of the first locking portion according to the preferred embodiment of the present invention.

FIG. 11 is a schematic top sectional view of the use of the first locking portion according to the preferred embodiment of the present invention.

FIG. 12 is a schematic side cross-sectional view of the first latching portion in use according to the preferred embodiment of the present invention.

Please refer to FIG. 1 to FIG. 4 , a preferred embodiment of the composite nut wrench of the present invention includes a handle 10 and a latching head 20 , and the latching head 20 is formed at one end of the handle 10 .

The latching head 20 includes a central axis A, a base portion 21 , a first latching portion 23 , and a second latching portion 25 . The base portion 21 is C-shaped around the central axis A, and is formed at one end of the handle 10 . The base portion 21 has a first abutting surface 211 and a second abutting surface 212 on opposite sides, respectively. The catch portion 23 is protruded from the first abutment surface 211 of the base portion 21 , and the second catch portion 25 is protruded from the second abutment surface 212 of the base portion 21 .

The first locking portion 23 includes a first surrounding portion 231 and a plurality of first locking blocks 233 . The first surrounding portion 231 is C-shaped around the central axis A and protrudes from the first portion of the base portion 21 . On the contact surface 211, the first surrounding portion 231 has a first opening 232, the radian of the first surrounding portion 231 is greater than 4 π/3 and less than 2 π, and the first locking blocks 233 are protruded from the first surrounding Each of the first locking pieces 233 has a first inclined surface 234 , the first inclined surface 234 is located on the side away from the first surrounding portion 231 and extends from the first inclined surface 234 of the base portion 21 An abutting surface 211 is inclined toward the first surrounding portion 231 in a direction away from the first abutting surface 211 . In this preferred embodiment, the first latching portion 23 has five first latches arranged at equal angular intervals. For the block 233, please refer to FIG. 4, the angle θ1 between the first inclined surface 234 of each first locking block 233 and the central axis A is 20 degrees to 40 degrees, preferably 30 degrees.

Please refer to FIG. 1 to FIG. 4 , the second locking portion 25 includes a second surrounding portion 251 and a second locking block 253 . The second surrounding portion 251 surrounds the central axis A and is protruded from the base portion 21 . The second contact surface 212, the second surrounding portion 251 has a second opening 252, the second opening 252 of the second surrounding portion 251 is larger than the first opening 232 of the first surrounding portion 231, the second surrounding portion 251 The radian is less than 10 π/9, and the inner diameter of the second surrounding portion 251 is larger than the inner diameter of the first surrounding portion 231 .

The second locking block 253 protrudes from the inner side of the second surrounding portion 251 and is adjacent to an edge of the second opening 252 , the second locking block 253 has a second inclined surface 254 , and the second inclined surface 254 is located away from One side of the second surrounding portion 251 is inclined to approach the second surrounding portion 251 from the second abutting surface 212 of the base portion 21 toward the direction away from the second abutting surface 212 , please refer to FIG. 3 , the second locking latch The included angle θ 2 between the second inclined surface 254 of the block 253 and the central axis A is 20 degrees to 40 degrees, preferably 30 degrees.

Preferably, the second latching portion 25 includes a support block 255 , the support block 255 is protruded from the inner side of the second surrounding portion 251 and is adjacent to the edge of the second opening 252 away from the second latching block 253 . .

Please refer to FIGS. 5 , 6 , 9 , and 10 , both the first latching portion 23 and the second latching portion 25 of the latching head 20 can be used to disassemble a nut 50 connected to the cutter bar. The cap 50 has a plurality of annular The grooves 52 are arranged at intervals, and each groove 52 includes a groove inclined surface 522, and the groove inclined surface 522 is inclined inwardly from the end edge away from the end surface of the nut 50 toward the end surface.

Please refer to FIG. 5 to FIG. 8 , when using the second latching portion 25 , the second latching portion 25 faces the nut 50 , and then the second latching block 253 is inserted into one of the nut 50 . The groove 52, the support block 255 abuts against the outer circumference of the nut 50, the second abutting surface 212 of the base 21 abuts against the end surface of the nut 50, and exerts force on the handle 10 to drive the nut 50 relative to As the cutter bar rotates, the nut 50 is locked or removed.

Since the second latching portion 25 only has a second latching block 253, when a tool with a larger cutting head, such as a chamfering cutter, is connected to the shank, the second latching portion 25 can be laterally approached to the nut After 50, the second locking block 253 is then locked in the groove 52 of the nut 50 to improve the convenience of use; because the second locking block 253 has the second inclined surface 254, the second The shape and size of the latching block 253 are matched with the shape and size of each groove 52 of the nut 50, so that the second latching block 253 can penetrate into the corresponding groove 52 to increase the second latching block The clamping area of 253 and the groove 52 increases the clamping strength.

Preferably, as shown in FIG. 8 , the linear distance D2 between the end surface of the second locking block 253 and the second abutting surface 212 of the base 21 is greater than or equal to 0.5 times the groove 52 of the nut 50 . The vertical length D1 prevents the second locking block 253 from being locked with the groove 52 from being too small, so that the second locking block 253 can be locked in the groove 52 more stably.

Please refer to FIG. 9 to FIG. 12 , when using the first latching portion 23 , the first latching portion 23 faces the nut 50 , and the first latching portion 23 is sleeved on the nut 50 , the The first locking blocks 233 are respectively inserted into the grooves 52 of the nut 50 , the first abutting surface 211 of the base 21 abuts against the end surface of the nut 50 , and applies force to the handle 10 to drive the nut The nut 50 is rotated relative to the cutter bar to lock or remove the nut 50 .

Since the first latching portion 23 has a plurality of first latching blocks 233, when a tool with a small cutting head angle, such as a drill bit, is connected to the shank, the latching head 20 can be directly and vertically sleeved on the nut 50, and let The first latching blocks 233 are respectively latched to the grooves 52 of the nut 50 to increase the latching strength and allow the user to easily rotate the nut 50 with force; since each of the first latching blocks 233 has The first inclined surface 234 makes the shape and size of the first locking block 233 match the shape and size of the groove 52 of the nut 50 , so that each first locking block 233 can penetrate into the corresponding recess. The groove 52 is formed, and the clamping area of each first clamping block 233 and the corresponding groove 52 is increased to improve the clamping strength.

Preferably, as shown in FIG. 12 , the linear distance D3 between the end surface of each first locking block 233 and the first abutting surface 211 of the base 21 is greater than or equal to 0.5 times the groove 52 of the nut 50 . The vertical length D1, in this preferred embodiment, the linear distance D3 between the end surface of each first locking block 233 and the first contact surface 211 of the base 21 is greater than or equal to 2/3 times the nut 50 The vertical length D1 of the groove 52 is increased, and the length of each first locking block 233 into the corresponding groove 52 is increased.

Preferably, the inner diameter of the first surrounding portion 231 is larger than the outer diameter of the nut 50 by 0.1 mm to 0.3 mm. For example, when the outer diameter of the nut 50 is 20 mm, the first surrounding portion The inner diameter of the 231 is 20.1 mm to 20.3 mm, so as to reduce the gap between the first surrounding portion 231 and the nut 50 and improve the coverage of the first locking portion 23 .

Preferably, the width of each first locking piece 233 (the distance between the opposite edges of the first inclined surface 234 ) is smaller than the width of the groove 52 of the nut 50 by 0.1 mm to 0.15 mm, and the width of each The gap between the first locking block 233 and each groove 52 .

Utilize the above-mentioned technical features, the composite nut wrench of the present invention has the following efficacy gains:

1. Since the latching head 20 forms the first latching part 23 and the second latching part 25 in different forms, the user can choose to use the first latching part 23 or the second latching part 23 or the second latching part according to the style of the tool connected to the tool bar. The detent 25 disassembles or locks the nut 50 to improve the convenience of use.

2. The shapes of each of the first latching blocks 233 and the second latching blocks 253 can be matched with the grooves 52 of the nut 50, and the first latching blocks 233 and the second latching blocks 253 can be lifted up together. The clamping stability and clamping strength of the groove 52 of the nut 50 .

10: Grip

20: Card head

21: Base

211: The first contact

23: The first latch

231: First Surrounding Department

232: First Opening

233: The first locking block

234: First Bevel

25: The second latch

252: Second Opening

Claims (7)

A composite nut wrench, comprising: a handle; and a latching head, the latching head is formed at one end of the handle, the latching head includes a a central axis; a base, the base is C-shaped around the central axis, and has a first abutting surface and a second abutting surface respectively located on opposite sides; a first latching portion, the first latching portion is protruded from the first abutting surface of the base portion, and includes a a first surrounding portion, the first surrounding portion is C-shaped and protrudes from the first abutting surface of the base portion, the first surrounding portion has a first opening; and A plurality of first locking blocks, the first locking blocks are protruded from the inner side of the first surrounding portion, and are arranged in a ring-shaped interval, each first locking block has a first inclined surface, and the first inclined surface is located away from One side of the first surrounding portion gradually approaches the first surrounding portion from the first abutting surface of the base toward the direction away from the first abutting surface; and a second latching portion, the second latching portion is protruded from the second abutting surface of the base portion, and includes a a second surrounding portion, the second surrounding portion is C-shaped and protrudes from the second abutting surface of the base portion, the second surrounding portion has a second opening; and a second latching block, the second latching block is protruded on the inner side of the second surrounding portion and adjacent to an edge of the second opening, the second latching block has a second inclined surface, the second inclined surface is located away from One side of the second surrounding portion gradually approaches the second surrounding portion from the second abutting surface of the base toward the direction away from the second abutting surface. The composite nut wrench of claim 1, wherein the second opening of the second surrounding portion is larger than the first opening of the first surrounding portion. The composite nut wrench as claimed in claim 2, wherein the second latching portion includes a support block, the support block is protruded from the second abutting surface of the base portion, located inside the second surrounding portion and adjacent to the The second opening is away from the edge of the second locking block. The composite nut wrench according to claim 3, wherein the included angle between the first inclined surface of each first locking block and the central axis is 20 degrees to 40 degrees, and the second inclined surface of the second locking block and the central axis are 20 degrees to 40 degrees. The included angle between the central axes is 20 degrees to 40 degrees. The compound nut wrench according to claim 3, wherein the radian of the first surrounding portion is greater than 4π/3 and less than 2π, and the radian of the second surrounding portion is less than 10π/9. The composite nut wrench as claimed in claim 3, wherein the inner diameter of the second surrounding portion is larger than the inner diameter of the first surrounding portion. The composite nut wrench according to any one of claims 1 to 6, wherein the first locking portion comprises five first locking blocks arranged at an angular interval.

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