TWM616661U - Torque output mechanism of torque wrench - Google Patents

Abstract

A torque output mechanism of a torque wrench has an opening in the center of the top of the body, and a gasket is installed at the bottom. The upper teeth are fixed under the opening of the body, the center has a through hole corresponding to the opening of the body, and the bottom has a plurality of teeth, and the included angle of each tooth is 10°~90°. There is a fixing hole in the center of the top end of the drive shaft, and a limiting column is installed in the bolt. The bolt passes through the upper tooth through hole and is screwed into the fixing hole of the drive shaft and abuts against the limiting column at the same time, so that the upper tooth and the drive shaft can be mutually free The combination of rotation. The upper end wall of the drive shaft has a plurality of first guide rails arranged in a straight direction, and the lower end has a driving part. The lower teeth are sleeved on the drive shaft and have a plurality of teeth that mesh with the upper teeth, and the inner wall surface of the lower teeth has a plurality of second guide rails arranged in a straight direction corresponding to the first guide rail, and a baffle is installed at the lower end. The left side of the tooth top of each tooth of the upper tooth and the right side of the tooth top of each tooth of the lower tooth are respectively chamfered. The balls are installed between the first guide rail and the second guide rail so that the lower teeth can move up and down relative to the drive shaft. The elastic element is sleeved on the outside of the drive shaft, and the top end of the elastic element abuts against the lower teeth, and the bottom end of the elastic element abuts against the gasket. The pressure ring is screwed to the bottom of the body.

Description

Torque output mechanism of torque wrench

The present invention relates to a torque wrench, and particularly relates to a torque output mechanism of a torque wrench.

Modern objects are fixed to each other with various screws and nuts. When users use wrenches and sockets to fix screws and nuts, they need to judge whether they are locked or not based on their own feelings in the early days. However, the locking between different materials or the torque that screws of different materials can withstand are not the same. When the user's judgment is wrong, it is often easy to cause the lock to collapse due to too much stress, or it is not confirmed. Lock tightly.

Therefore, a torque wrench that can set the torque value has been developed. The traditional acoustic torque wrench uses the mechanism that the torque is greater than the compression spring and then releases to achieve the torque value setting. At the moment of release, although there is a sound of knocking on the inner wall of the body, the user should stop applying force immediately, otherwise the torque will continue to be applied. On the screw lock object; however, even if the user immediately stops turning and applying force when he hears the sound, there will still be a time gap, and it is impossible to know the torque value applied during this period. In addition, the traditional acoustic wrench can only be applied manually, and cannot be driven by pneumatic or electric power.

For example, in the Taiwan Invention Patent No. I645944 Patent "Torque Wrench", the tripping mechanism includes a linkage piece and two rolling elements, which are respectively connected to the linkage piece by a transmission rod and a pusher assembly. The two ends form a linkage mechanism. The two rolling elements are pivoted on the ejector assembly and roll against the inner wall of the sleeve. When the applied force reaches the preset torque value, the percussion part of the transmission rod will strike the inner wall of the sleeve, and then move through the linkage The sheet drives the pusher assembly to move backward to squeeze the elastic piece.

Therefore, one aspect of the present invention is to provide a torque adjustment mechanism for a torque wrench that can accurately control the torque and automatically trip. Utilizing the design of ball bearing between the lower tooth and the drive shaft, after reaching the preset torque value, the lower tooth jumps out and engages with the upper tooth, and the frictional force when moving up and down relative to the drive shaft approaches zero, and the upper tooth can be moved up and down. The meshing force between the tooth and the lower tooth is directly converted into the torque value to achieve the accuracy of the torque setting, and the torque applied to the screw lock is automatically tripped. In addition, the torque adjustment mechanism of the torque wrench of the present invention can be driven by pneumatic or electric power in addition to manual force to achieve the purpose of automated production.

According to an embodiment of the present invention, a torque output mechanism of a torque wrench includes a body, an upper tooth, a drive shaft, a bolt, a lower tooth, a plurality of balls, an elastic element, and a pressure ring. The longitudinal section of the main body is ㄇ-shaped, the top center of the main body has an opening, and the bottom end is equipped with a gasket. The upper teeth are fixed under the opening of the body. The center of the upper teeth has a through hole and the bottom has a plurality of teeth. The through holes correspond to the opening of the body. The angle of each tooth is 10°~90°, and the The left side of the tooth top has a chamfer. A fixing hole is arranged in the center of the top end of the drive shaft, a limiting post is installed in the fixing hole, and the upper end wall of the drive shaft has a plurality of first guide rails arranged in a straight direction, and the lower end has a driving part. The bolt penetrates the through hole of the upper tooth and is screw-locked in the fixing hole of the drive shaft and abuts against the limit post in the fixing hole to connect the drive shaft and the upper tooth in a mutually freely rotatable combination. The lower teeth are sleeved on the drive shaft and have a plurality of teeth meshing with the upper teeth, and the right side of the tooth top of each of the lower teeth has a chamfer, and the inner wall of the lower teeth has a straight The arranged plural second guide rails are used to correspond to the first guide rail of the drive shaft, and a baffle is installed at the lower end of the second guide rail. The ball is installed between the first guide rail and the second guide rail, so that the lower teeth can move up and down relative to the drive shaft. The elastic element is sleeved on the outside of the drive shaft, and the top end of the elastic element abuts against the lower teeth, and the bottom end of the elastic element abuts against the gasket, and is screw-locked to the bottom of the body with a pressure ring.

According to an embodiment of the present invention, the torque output mechanism of the torque wrench further includes an upper driving part fixed at the top of the body.

According to another embodiment of the present invention, the upper driving part and the main body are integrally formed.

According to another embodiment of the present invention, a plurality of steel balls are installed between the gasket and the pressure ring.

According to still another embodiment of the present invention, the outer surface of the body is provided with a grip portion.

According to another embodiment of the present invention, the torque output mechanism of the torque wrench further includes a first oil seal, a second oil seal, and a third oil seal, and the body is filled with a proper amount of lubricating liquid. The first oil seal is arranged between the top end of the upper tooth and the opening of the body; the second oil seal is arranged between the pressure ring and the drive shaft; the third oil seal is arranged between the pressure ring and the body.

According to still another embodiment of the present invention, in the torque output mechanism of the torque wrench described above, the right side of the tooth top of each tooth of the upper tooth and the left side of the tooth top of each tooth of the lower tooth are respectively chamfered.

According to another embodiment of the present invention, the torque output mechanism of the torque wrench described above further includes a shock-absorbing washer installed on the upper end of the second guide rail of the lower tooth.

According to another embodiment of the present invention, a torque output mechanism of a torque wrench includes a body, an upper tooth, a drive shaft, a bolt, a lower tooth, a plurality of balls, an elastic element, and a pressure ring. The center of the top end of the main body is provided with a sleeve hole, and the bottom end is provided with a gasket. The upper teeth are fixed under the socket hole of the body, The upper tooth has a through hole in the center and a plurality of teeth on the bottom. The through hole corresponds to the socket hole of the body. The included angle of each tooth is 10°~90°, and the left side of the tooth top of each tooth has a chamfer. A fixing hole is arranged in the center of the top end of the drive shaft, a limiting post is installed in the fixing hole, and the upper end wall of the drive shaft has a plurality of first guide rails arranged in a straight direction, and the lower end has a driving part. The bolt penetrates the through hole of the upper tooth and is screw-locked to the fixed hole of the drive shaft, and at the same time abuts against the limiting post in the fixed hole, so that the drive shaft and the upper tooth can be combined freely with each other. The lower teeth are sleeved on the drive shaft and have a plurality of teeth meshing with the upper teeth, and the right side of the tooth top of each of the lower teeth has a chamfer, and the inner wall of the lower teeth has a plurality of second guide rails arranged in a straight direction. The first guide rail corresponding to the drive shaft is provided with a baffle at the lower end of the second guide rail. The ball is installed between the first guide rail and the second guide rail, so that the lower teeth can move up and down relative to the drive shaft. The elastic element is sleeved on the outside of the drive shaft, and the top end of the elastic element abuts against the lower teeth, and the bottom end of the elastic element abuts against the gasket, and is screw-locked to the bottom of the body with a pressure ring.

According to an embodiment of the present invention, a plurality of steel balls are installed between the gasket and the pressure ring.

According to another embodiment of the present invention, the torque output mechanism of the torque wrench further includes a first oil seal, a second oil seal, and a third oil seal, and the body is filled with a proper amount of lubricating liquid. The first oil package is arranged between the top end of the upper tooth and the sleeve hole of the body; the second oil package is arranged between the pressure ring and the drive shaft; the third oil package is arranged between the pressure ring and the body.

According to another embodiment of the present invention, in the torque output mechanism of the torque wrench described above, the right side of the tooth top of each tooth of the upper tooth and the left side of the tooth top of each tooth of the lower tooth are respectively chamfered.

According to still another embodiment of the present invention, the torque output mechanism of the torque wrench described above further includes a shock-absorbing washer installed on the upper end of the second guide rail of the lower tooth.

According to another embodiment of the present invention, a torque output mechanism package of a torque wrench Contains a body, a torque scale ring, upper teeth, drive shaft, bolts, lower teeth, balls, first elastic element, pressure ring, torque adjustment ring, and fixed components. The top end of the main body is provided with a sleeve hole, and the lower end surface of the main body is provided with a plurality of threads. The torque scale ring is sleeved outside the upper end of the body and fixed with a nut. The upper teeth are fixed under the socket holes in the body. The upper teeth have a through hole in the center and a plurality of teeth at the bottom. The through holes correspond to the socket holes of the body. The angle of each tooth is 10°~90°, and each A tooth has a chamfer on the left side of the top of the tooth. There is a fixing hole in the center of the top end of the drive shaft, a limiting column is installed in the fixing hole, and the upper end wall of the drive shaft has a plurality of first guide rails arranged in a straight direction, the lower end has a driving part, and the outer wall of the driving part fixes the positioning element. The bolt passes through the through hole of the upper tooth and is screw-locked to the fixed hole of the drive shaft, and at the same time abuts against the limit post in the fixed hole, so that the drive shaft and the upper tooth can be combined freely with each other. The lower teeth are sleeved on the drive shaft and have a plurality of teeth meshing with the upper teeth, and the right side of the tooth top of each of the lower teeth has a chamfer, and the inner wall of the lower teeth has a plurality of second guide rails arranged in a straight direction. The first guide rail corresponding to the drive shaft is provided with a baffle at the lower end of the second guide rail. The ball is installed between the first guide rail and the second guide rail, so that the lower teeth can move up and down relative to the drive shaft. The first elastic element is sleeved on the outside of the drive shaft and abuts against the lower teeth. The pressure ring is sleeved on the lower end of the drive shaft and abuts against the lower end of the first elastic element. The inner wall surface of the torque adjusting ring is threaded, and the bottom of the body is screwed with the body, and the inner bottom of the torsion adjusting ring abuts against the lower end of the pressure ring, whereby the torque adjusting ring rotates with respect to the body to move up and down and compress the first elastic element through the pressure ring , The side of the torque adjusting ring has a fixing hole. The fixing component is installed in the fixing hole of the torque adjusting ring to fix the torque adjusting ring and the body.

According to an embodiment of the present invention, the torque output mechanism of the torque wrench further includes a second elastic element sleeved outside the first elastic element, and the upper end of the second elastic element abuts against the lower teeth, and the lower end of the second elastic element abuts于压环。 In the pressure ring.

According to another embodiment of the present invention, the torque output mechanism of the above-mentioned torque wrench further includes Contains a first oil seal, a second oil seal and a third oil seal, and the inside of the body is filled with a proper amount of lubricating liquid. The first oil package is arranged between the upper teeth and the sleeve hole of the body; the second oil package is arranged between the pressure ring and the drive shaft; the third oil package is arranged between the pressure ring and the body.

According to another embodiment of the present invention, the above-mentioned fixing assembly includes a hollow column, a copper sleeve, and an adjusting ring fixing screw. The hollow column is welded to the fixing hole on the side of the torque adjusting ring. The copper sleeve has a plurality of threads, which are installed in the hollow column and occlude the threads of the body. The adjusting ring fixing screw is screwed into the hollow column and against the copper sleeve to fix the torque adjusting ring and the body.

According to another embodiment of the present invention, the torque output mechanism of the torque wrench further includes a gasket and a plurality of steel balls. The gasket is installed on the inner side of the bottom of the torque adjusting ring and defines a space with the pressure ring, and the plural steel balls are installed in the space defined by the pressure ring and the gasket.

According to still another embodiment of the present invention, in the torque output mechanism of the torque wrench described above, the right side of the tooth top of each tooth of the upper tooth and the left side of the tooth top of each tooth of the lower tooth are respectively chamfered.

According to another embodiment of the present invention, the torque output mechanism of the torque wrench described above further includes a shock-absorbing washer installed on the upper end of the second guide rail of the lower tooth.

100: Torque output mechanism of torque wrench

102: The first oil seal

104: second oil seal

106: third oil seal

107: Gasket

108: Steel Ball

110: body

112: socket hole

114: Thread

120: Torque scale ring

122: lock firmware

130: upper teeth

132: Through hole

134: Tooth

140: drive shaft

141: fixed hole

142: The first rail

143: Limiting Column

144: Drive

145: Bolt

146: Positioning components

150: lower teeth

152: Teeth

154: second rail

156: Block

158: Damping gasket

160: ball

170: first elastic element

172: second elastic element

180: pressure ring

190: Torque adjustment ring

192: Thread

194: bottom

196: fixed hole

200: fixed components

202: Hollow column

204: Copper sleeve

205: thread

206: Adjusting ring fixing screw

300: Torque output mechanism of torque wrench

302: first oil seal

304: second oil seal

306: third oil seal

310: body

312: open

314: Gasket

316: Grip

320: upper teeth

322: Through hole

330: drive shaft

331: fixed hole

332: first rail

333: Limit Column

334: Drive

335: Bolt

340: lower teeth

344: second rail

346: Block

348: Damping Gasket

350: ball

360: elastic element

370: Pressure Ring

372: Steel Ball

400: Torque output mechanism of torque wrench

402: first oil seal

404: second oil seal

406: third oil seal

410: body

420: upper teeth

430: drive shaft

440: lower teeth

450: ball

460: elastic element

470: Pressure Ring

480: Upper drive section

482: socket hole

A-A: Sectional line

To make the above and other objectives, features, advantages and embodiments of the present invention more obvious and understandable, the description of the accompanying drawings is as follows:

Figure 1 is a perspective view showing the appearance of a torque output mechanism of a torque wrench according to an embodiment of the present invention;

Figure 2A is a longitudinal sectional view of the torque output mechanism of the torque wrench shown in Figure 1;

Figure 2B is a longitudinal sectional view of the torque output mechanism of the torque wrench according to another embodiment of the present invention;

Figure 3 is a side view of the upper teeth of the torque output mechanism of the torque wrench shown in Figure 2A;

Figure 4 is a cross-sectional view of the torque output mechanism of the torque wrench in Figure 2A along the section line A-A;

Figure 5 is a three-dimensional schematic diagram of the upper teeth, lower teeth and drive shaft of the torque output mechanism of the torque wrench shown in Figure 2A;

Figure 6 is a sectional view of the fixed components of the torque output mechanism of the torque wrench shown in Figure 2A;

Figure 7 is a longitudinal sectional view of a torque output mechanism of a torque wrench according to another embodiment of the present invention; and

Figure 8 is a longitudinal sectional view of a torque output mechanism of a torque wrench according to yet another embodiment of the present invention.

Please refer to FIG. 1 and FIG. 2A, which are respectively an external perspective view and a longitudinal sectional view of a torque output mechanism 100 of a torque wrench according to an embodiment of the present invention. The torque output mechanism 100 of the torque wrench includes a body 110, a torque scale ring 120, an upper tooth 130, a drive shaft 140, a lower tooth 150, a ball 160, a first elastic element 170, a pressure ring 180, a torque adjustment ring 190, and a fixing assembly 200 . In the following, the relationship between the components of the torque output mechanism 100 of the torque wrench of the present invention will be described first. In addition, "first", "second" and similar words used in the specification of the present model and the scope of the patent application do not indicate any order, quantity or importance, but are only used to distinguish different elements.

As shown in Figure 2A, the top of the body 110 has a socket hole 112 for socketing the driving head of the wrench, such as a manual ratchet wrench, a pneumatic or electric screwdriver. The outer surface of the body 110 has a plurality of threads 114 near the lower end portion. The torque scale ring 120 is sleeved on the outer surface of the main body 110 without the thread 114 and is fixed by the fastener 122.

Figure 3 is a side view of the upper teeth of the torque output mechanism of the torque wrench shown in Figure 2A. Please refer to Figure 2A and Figure 3 at the same time. The upper tooth 130 is fixed under the socket hole 112 in the body 110, wherein the upper tooth 130 has a through hole 132 in the center and a plurality of teeth 134 at the bottom. The through hole 132 corresponds to the socket hole 112 of the body 110. Furthermore, each tooth 134 of the upper tooth 130 has an included angle A.

Figure 4 is a cross-sectional view of the torque output mechanism of the torque wrench in Figure 2A along the section line A-A. Please refer to Figure 2A and Figure 4 at the same time. There is a fixing hole 141 in the center of the top end of the drive shaft 140. The fixing hole 141 is equipped with a limiting post 143. The upper wall of the drive shaft 140 has a plurality of first guide rails 142 arranged in a straight direction. The lower end has a driving part 144 for connecting the driven parts. . The bolt 145 passes through the through hole 132 of the upper tooth 130 and is screw-locked to the fixing hole 141 of the drive shaft 140, and at the same time abuts against the limit post 143 in the fixing hole 141, so that the drive shaft 140 and the upper tooth 130 can rotate freely with each other The combination. According to an embodiment of the present invention, the driving portion 144 is a protruding connecting block (as shown in Figure 2B, which is a longitudinal sectional view of a torque output mechanism of a torque wrench according to another embodiment of the present invention) or a hexagonal concave hole, As shown in Figure 2A, it is used to connect driven parts, such as ordinary sockets or hexagonal screwdriver bits (Screwdriver Bits). In addition, a setting element 146 is installed on the outer wall of the driving portion 144 at the lower end of the driving shaft 140 to prevent the torque adjusting ring 190 from falling off.

Figure 5 is a perspective view of the upper teeth, lower teeth and drive shaft of the torque output mechanism of the torque wrench shown in Figure 2A. Please refer to Figure 2A, Figure 3, Figure 4 and Figure 5 at the same time. The lower teeth 150 are sleeved on the drive shaft 140 and have a plurality of teeth 152 that mesh with the upper teeth 130. In detail, The lower teeth 150 mesh with the plural teeth 134 of the upper teeth 130 by the plural teeth 152, as shown in FIG. In addition, the left side of the top of each tooth 134 of the upper tooth 130 and the right side of the top of each tooth 152 of the lower tooth 150 have chamfers 135 and 153 respectively, so that when the predetermined torque is reached, the lower tooth 150 can Smoothly escapes the meshing with the upper teeth 130. Or, as in an embodiment of the present invention, both sides of the tooth top of each tooth 134 of the upper tooth 130 and both sides of the tooth top of each tooth 152 of the lower tooth 150 have chamfers 135 and 153 respectively, as shown in the third As shown in Figure and Figure 5.

At the same time, the inner wall surface of the lower tooth 150 has a plurality of second guide rails 154 arranged in a straight direction to correspond to the first guide rail 142 of the drive shaft 140. The ball 160 is installed between the first guide rail 142 and the second guide rail 154, so that the lower teeth 150 can move up and down relative to the drive shaft 140. With the design of the first guide rail 142, the second guide rail 154, and the balls 160, the friction force between the lower teeth 150 and the driving shaft 140 approaches zero when the lower teeth 150 move up and down relative to the driving shaft 140. A stopper 156 is installed on the lower end of the second guide rail 154 to stop the ball 160, and a shock-absorbing pad 158 is installed on the upper end of the second guide rail 154 of the lower teeth 150 to reduce the lower end of the second guide rail 154 Vibration and wear when the teeth 150 and the upper teeth 130 are separated from each other.

Please refer to Figure 2A. The first elastic element 170 is sleeved on the outside of the driving shaft 140 and abuts against the lower teeth 150. The pressure ring 180 is sleeved on the lower end of the drive shaft 140 and abuts against the lower end of the first elastic element 170. According to another embodiment of the present invention, the torque output mechanism 100 of the torque wrench further includes a second elastic element 172, which is sleeved outside the first elastic element 170, and the upper end of the second elastic element 172 abuts the lower teeth 150, and the second elastic element 172 abuts against the lower teeth 150. The lower ends of the two elastic elements 172 abut against the pressure ring 180.

The inner wall of the torque adjustment ring 190 has a plurality of threads 192, which are screwed from the bottom of the body 110 to the plurality of threads 114 of the body 110, and the inner bottom 194 of the torque adjustment ring 190 abuts against the lower end of the pressure ring 180, whereby the torque adjustment ring 190 is relative to the body 110 rotation up and down displacement and through the top pressure The force ring 180 compresses the first elastic element 170 and the second elastic element 172. In addition, the side of the torque adjustment ring 190 has a fixing hole 196 for installing the fixing assembly 200 to fix the torque adjustment ring 190 and the body 110.

Specifically, the torsion adjusting ring 190 rotates up and down relative to the main body 110 and compresses the first elastic element 170 and the second elastic element 172 through the abutting pressure ring 180, so that the first elastic element 170 and the second elastic element 172 generate The pressure provides the meshing force (friction force) between the upper tooth 130 and the lower tooth 150. When the user inputs power through the torque output mechanism of the torque wrench of the present invention, there is friction between the upper teeth 130 and the lower teeth 150 (provided by the compression force of the elastic elements 170 and 172 against the lower teeth 150). ), through the upper teeth 130 meshing with the lower teeth 150 to rotate, and then the lower teeth 150 drive the drive shaft 140 hanging on the upper teeth 130 to rotate, and the torque is transmitted from the driving portion 144 of the drive shaft 140 to the driven part, thereby being driven by rotation Pieces. When the input force (torque) is greater than the meshing force (friction force) between the upper teeth 130 and the lower teeth 150, the upper teeth 130 and the lower teeth 150 will disengage, and the lower teeth 150 will move up and down relative to the drive shaft 140. Drive the drive shaft 140 to rotate. Due to the design of the first guide rail 142, the second guide rail 154 and the ball 160 between the lower tooth 150 and the drive shaft 140 in the torque output mechanism of the torque wrench of the present invention, the friction when the lower tooth 150 moves up and down relative to the drive shaft 140 The force approaches zero, so the input torque when the upper teeth 130 and the lower teeth 150 are disengaged is the set meshing force (friction force) between the upper teeth 130 and the lower teeth 150, in other words, it is the elastic element 170, The 172 resists the pressure of the lower teeth 150, so that the required torque can be accurately calculated and controlled, and the sensitivity can be improved.

In addition, if the pressure provided by the first elastic element 170 and the second elastic element 172 is fixed, the greater the angle A between each tooth 134 of the upper tooth 130, the meshing force (frictional force) between the upper tooth 130 and the lower tooth 150 The smaller the force), the smaller the torque value that can be converted; on the contrary, the smaller the angle A is, the greater the meshing force (friction force) between the upper teeth 130 and the lower teeth 150, that is, the greater the torque value that can be converted . However, when the included angle A is too large, the meshing force between the upper teeth 130 and the lower teeth 150 is extremely weak, or when the included angle A is too small, the meshing force between the upper teeth 130 and the lower teeth 150 is too large, which is not suitable for actual use. Therefore, according to an embodiment of the present invention, the angle A between each tooth 134 and 152 of the upper tooth 130 and the lower tooth 150 is 10°~90°.

According to an embodiment of the present invention, the torque output mechanism 100 of the torque wrench further includes a first oil seal 102, a second oil seal 104, and a third oil seal 106, and the body 110 is filled with a proper amount of lubricating liquid. The first oil seal 102 is installed between the upper teeth 130 and the socket hole 112 of the body 110; the second oil seal 104 is installed between the pressure ring 180 and the drive shaft 140; the third oil seal 106 is located between the pressure ring 180 and the body 110 Between, as shown in Figure 2A. The lubricating liquid achieves the effect of lubrication and heat dissipation.

Furthermore, according to another embodiment of the present invention, the torque output mechanism 100 of the torque wrench further includes a washer 107 and a plurality of steel balls 108. The gasket 107 is installed on the inner side of the bottom of the torque adjusting ring 190 and defines a space with the pressure ring 180. The plural steel balls 108 are installed in the space defined by the pressure ring 180 and the gasket 107, as shown in Figure 2A. Reduce the frictional force between the pressure ring 180 and the torque adjusting ring 190 when they rotate relative to each other.

Fig. 6 is a cross-sectional view of the fixing assembly 200 in the torque output mechanism of the torque wrench shown in Fig. 2A. The fixing assembly 200 includes a hollow column 202, a copper sleeve 204, and an adjusting ring fixing screw 206. The hollow column 202 is welded to the fixing hole 196 on the side of the torque adjusting ring 190. The copper sleeve 204 has a plurality of threads 205, which is installed in the hollow column 202 and occludes the threads 114 of the body 110. The adjusting ring fixing screw 206 is screwed into the hollow column 202 and pressed against the copper sleeve 204 to fix the torque adjusting ring 190 and the body 110.

Specifically, due to the design of the first guide rail 142, the second guide rail 154 and the ball 160 between the lower tooth 150 and the drive shaft 140 in the torque output mechanism of the torque wrench of the present invention, the lower tooth The frictional force between 150 and the drive shaft 140 approaches zero, so the input torque when the upper teeth 130 and the lower teeth 150 are disengaged is the meshing force (frictional force) between the upper teeth 130 and the lower teeth 150, and this engagement The resultant force is the pressure of the elastic elements 170 and 172 against the lower teeth 150. Therefore, when the user rotates the torque adjusting ring 190 to push up against the pressure ring 180 to compress the first elastic element 170 and the second elastic element 172, thereby providing the meshing force between the upper teeth 130 and the lower teeth 150, the ring can be adjusted according to the torque The upper edge of 190 corresponds to the number shown in the torque scale ring 120 to set the required torque value, without considering the friction between the lower tooth 150 and the drive shaft 140 when the upper tooth 130 and the lower tooth 150 are disengaged, thereby Accurately calculate and control the required torque to improve sensitivity. When the user rotates the torque adjusting ring 190 to the required torque value, the adjusting ring fixing screw 206 in the hollow column 202 is tightened to press against the thread 114 of the copper sleeve 204 on the body 110, thereby tightening the torque adjusting ring 190 The relative position with the main body 110 is fixed, and the torque value setting is completed.

FIG. 7 is a longitudinal view of a torque output mechanism 300 of a torque wrench according to another embodiment of the present invention. The torque output mechanism 300 of the torque wrench includes a main body 310, an upper tooth 320, a driving shaft 330, a lower tooth 340, a plurality of balls 350, an elastic element 360 and a pressure ring 370.

In this embodiment, the longitudinal section of the main body 310 is ㄇ-shaped, the main body 310 has an opening 312 in the center of the top end, and a gasket 314 is installed at the bottom end.

The upper teeth 320 are fixed under the opening 312 of the main body 310. The upper teeth 320 have a through hole 322 in the center and a plurality of teeth on the bottom. The through hole 322 corresponds to the opening 312 of the body 310, and each tooth has an angle It is 10°~90°.

A fixing hole 331 is provided in the center of the top end of the driving shaft 330, and a limiting post 333 is installed in the fixing hole 331. The upper end wall of the driving shaft 330 has a plurality of first guide rails 332 arranged in a straight direction, and the lower end has a driving part 334. The bolt 335 passes through the through hole 322 of the upper tooth 320 and is screw-locked in the fixing hole 331 of the drive shaft 330 and abuts against the limiting post 333 in the fixing hole 331 to make the drive shaft 330 and the upper tooth 320 compatible. The combination of mutual free rotation.

The lower tooth 340 is sleeved on the drive shaft 330 and has a plurality of teeth to mesh with the upper tooth 320. As described in the foregoing embodiment, the left side of the top of each tooth of the upper tooth 320 and each tooth of the lower tooth 340 The right sides of the tooth tops are respectively chamfered, so that when the predetermined torque is reached, the lower teeth 340 can smoothly escape and engage with the upper teeth 320. Alternatively, both sides of the tooth top of each tooth of the upper tooth 320 and both sides of the tooth top of each tooth of the lower tooth 340 have chamfers respectively. Furthermore, the inner wall surface of the lower teeth 340 has a plurality of second guide rails 344 arranged in a straight direction to correspond to the first guide rail 332 of the drive shaft 330, and the second guide rail 344 is provided with a baffle 346 at the lower end and a shock absorber at the upper end. The spacer 348 and the ball 350 are installed between the first guide rail 332 and the second guide rail 344, so that the lower teeth 340 can move up and down relative to the drive shaft 330.

The elastic element 360 is sleeved on the outside of the drive shaft 330, and the top end of the elastic element 360 abuts against the lower teeth 340, the bottom end abuts against the gasket 314, and the pressure ring 370 is screwed to the bottom of the main body 310. According to an embodiment of the present invention, a plurality of steel balls 372 are installed between the gasket 314 and the pressure ring 370 to reduce the frictional force between the gasket 314 and the pressure ring 370 during relative rotation.

Specifically, the pressure ring 370 presses against the washer 314, and then compresses the elastic element 360 to apply a certain meshing force between the lower teeth 340 and the upper teeth 320. When the torque input by the user does not reach the meshing force, the input Torque will drive the drive shaft 330 to rotate through the tightly meshed upper and lower teeth to transmit this torque from the driving portion 334 of the drive shaft 330 to the driven part; when the input torque is greater than the meshing force, the upper teeth 320 and the lower teeth 340 will The disengagement makes the lower teeth 340 slide up and down relative to the drive shaft 330, and cannot drive the drive shaft 330 to rotate. And because of the design of the first guide rail 332, the second guide rail 344 and the balls 350, the friction force between the lower teeth 340 and the drive shaft 330 approaches zero when the lower teeth 340 move up and down, so the input when the upper teeth 320 and the lower teeth 340 are disengaged The torsion force is the meshing force (friction force) between the upper teeth 320 and the lower teeth 340, and this meshing force is the pressure of the elastic element 360 against the lower teeth. Therefore, in In this embodiment, the torque output mechanism 300 of the torque wrench is fixed to the bottom of the main body 310 through the pressure provided by the elastic element 360 and the pressure ring 370 to accurately provide the rated torque.

According to an embodiment of the present invention, the outer surface of the main body 310 is provided with a grip portion 316 for the user to directly hold and turn the torque output mechanism 300 of the torque wrench of the present invention to apply torque to the driven object without additional sockets. The wrench rotates. (In this embodiment, the user can hold it by hand and apply force directly, but whether it can be externally connected is not the key point, so it will not be discussed separately)

According to another embodiment of the present invention, the torque output mechanism 300 of the torque wrench further includes a first oil seal 302, a second oil seal 304, and a third oil seal 306, and the body 310 is filled with an appropriate amount of lubricating liquid. The first oil seal 302 is installed between the top of the upper tooth 320 and the opening 312 of the body 310; the second oil seal 304 is installed between the pressure ring 370 and the drive shaft 330; the third oil seal 306 is a leak-proof tape installed on the pressure ring 370 And the main body 310, as shown in Figure 7. The lubricating liquid achieves the effect of lubrication and heat dissipation.

Figure 8 is a longitudinal sectional view of a torque output mechanism of a torque wrench according to another embodiment of the present invention. The torque output mechanism 400 of the torque wrench includes a main body 410, an upper tooth 420, a driving shaft 430, a lower tooth 440, a plurality of balls 450, an elastic element 460, a pressure ring 470, and an upper driving part 480.

In this embodiment, the structures of the upper teeth 420, the drive shaft 430, the lower teeth 440, the plurality of balls 450, the elastic element 460, and the pressure ring 470 are the same as the foregoing embodiment. The difference is that in this embodiment, the upper driving part 480 is located above the main body 410, and the top end of the upper driving part 480 has a socket hole 482, which can be used to socket the driving head of a general wrench, such as a manual ratchet wrench, a pneumatic or electric screwdriver. According to an embodiment of the present invention, the upper driving portion 480 and the main body 410 are integrally formed. As shown in FIG. 8, the longitudinal section of the main body 410 is U-shaped, and the center of the top end of the main body 410 has a socket hole 482.

The torque output mechanism 400 of the torque wrench further includes a first oil seal 402, a second oil seal 404, and a third oil seal 406, and the body 410 is filled with an appropriate amount of lubricating liquid. The first oil seal 402 is installed between the top end of the upper teeth 420 and the sleeve hole 482 of the upper driving part 480 on the top of the main body 410; the second oil seal 404 is installed between the pressure ring 470 and the drive shaft 430; the third oil seal 406 is a leak stop The tape is installed between the pressure ring 470 and the main body 410, as shown in FIG. 8. The lubricating liquid achieves the effect of lubrication and heat dissipation.

In summary, the torque output mechanism of the new torque wrench utilizes the design of a ball bearing between the lower teeth and the drive shaft, so that after reaching the preset torque value, the lower teeth jump out and engage with the upper teeth and turn up and down relative to the drive shaft. The frictional force during displacement approaches zero, and the meshing force provided by the elastic element between the upper and lower teeth can be directly converted into a torque value to achieve the accuracy of the torque setting and improve the sensitivity. Furthermore, the torque adjustment mechanism of the torque wrench of the present invention can be driven by pneumatic or electric power in addition to manual force application to achieve the purpose of automated production.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone who is familiar with this technique can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection of the present invention The scope shall be subject to the definition of the attached patent application scope.

100: Torque output mechanism of torque wrench

102: The first oil seal

104: second oil seal

106: third oil seal

107: Gasket

108: Steel Ball

110: body

112: socket hole

114: Thread

120: Torque scale ring

122: lock firmware

130: upper teeth

132: Through hole

140: drive shaft

143: Limiting Column

144: Drive

145: Bolt

146: Positioning components

150: lower teeth

156: Block

158: Damping gasket

160: ball

170: first elastic element

172: second elastic element

180: pressure ring

190: Torque adjustment ring

192: Thread

194: bottom

196: fixed hole

200: fixed components

202: Hollow column

A-A: Sectional line

Claims (20)

A torque output mechanism of a torque wrench, including: A body, a longitudinal section of which is in the shape of an ㄇ, the body has an opening in the center of the top end, and a gasket is installed at the bottom end; An upper tooth is fixed below the opening of the body, the upper tooth has a through hole in the center and a plurality of teeth at the bottom, and the through hole corresponds to the opening of the body, wherein the included angle of each tooth is 10° ~90°, and the left side of the tooth top of each tooth has a chamfer; A drive shaft with a fixing hole in the center of the top end, and a limit post is installed in the fixing hole, wherein the upper end wall of the drive shaft has a plurality of first guide rails arranged in a straight direction, and the lower end has a driving part; A bolt penetrates the through hole of the upper tooth and is screw-locked in the fixing hole of the drive shaft and abuts against the limiting post in the fixing hole, so that the drive shaft and the upper tooth can rotate freely with each other The combination The lower tooth is sleeved on the drive shaft and has a plurality of teeth meshing with the upper tooth, and the right side of the tooth top of each of the lower teeth has a chamfer, wherein the inner wall surface of the lower tooth has a straight arrangement The plurality of second guide rails are used to correspond to the first guide rails of the drive shaft, and a baffle is installed at the lower end of the second guide rails; A plurality of balls are installed between the first guide rails and the second guide rails, so that the lower teeth can move up and down relative to the drive shaft; An elastic element sleeved outside the drive shaft, and a top end of the elastic element abuts against the lower tooth, and a bottom end abuts against the gasket; and A pressure ring is screw-locked to the bottom of the body. The torque output mechanism of the torque wrench as described in claim 1, further comprising: an upper driving part fixed at the top of the body. The torque output mechanism of the torque wrench according to claim 2, wherein the upper driving part and the main body are integrally formed. The torque output mechanism of the torque wrench according to claim 1, wherein a plurality of steel balls are installed between the gasket and the pressure ring. The torque output mechanism of the torque wrench according to claim 1, wherein the outer surface of the body is provided with a grip portion. The torque output mechanism of the torque wrench as described in claim 1, further including: A first oil seal installed between the top end of the upper tooth and the opening of the body; A second oil seal installed between the pressure ring and the drive shaft; A third oil seal installed between the pressure ring and the body; and An appropriate amount of lubricating liquid is filled inside the body. The torque output mechanism of the torque wrench according to claim 1, wherein the right side of the tooth top of each tooth of the upper tooth and the left side of the tooth top of each tooth of the lower tooth respectively have a chamfer. The torque output mechanism of the torque wrench as described in claim 1, further including: A shock-absorbing washer is installed on the upper end of the second guide rail of the lower tooth. A torque output mechanism of a torque wrench, including: A body, a longitudinal section of which is in the shape of a ㄇ, the top end has a socket hole for socketing a wrench drive head, and the bottom end of the body is equipped with a gasket; An upper tooth is fixed below the socket hole of the body, the upper tooth has a through hole in the center and a plurality of teeth at the bottom, the through hole corresponds to the socket hole of the body, wherein each tooth The included angle is 10°~90°, and the left side of the tooth top of each tooth has a chamfer; A drive shaft with a fixing hole in the center of the top end, a limiting post is installed in the fixing hole, and the upper end wall of the drive shaft has a plurality of first guide rails arranged in a straight direction, and a driving part is provided at the lower end; A bolt penetrates the through hole of the upper tooth and is screw-locked to the fixing hole of the drive shaft, and at the same time abuts against the limiting post in the fixing hole, so that the drive shaft and the upper tooth can rotate freely with each other The combination The lower tooth is sleeved on the drive shaft and has a plurality of teeth meshing with the upper tooth, and the right side of the tooth top of each of the lower teeth has a chamfer, wherein the inner wall surface of the lower tooth has a straight arrangement The plurality of second guide rails are used to correspond to the first guide rails of the drive shaft, and a baffle is installed at the lower end of the second guide rails; A plurality of balls are installed between the first guide rails and the second guide rails, so that the lower teeth can move up and down relative to the drive shaft; An elastic element sleeved outside the drive shaft, and a top end of the elastic element abuts against the lower tooth, and a bottom end abuts against the gasket; and A pressure ring is screw-locked to the bottom of the body. The torque output mechanism of the torque wrench according to claim 9, wherein a plurality of steel balls are installed between the gasket and the pressure ring. The torque output mechanism of the torque wrench as described in claim 9 further includes: A first oil seal installed between the top end of the upper tooth and the socket hole of the body; A second oil seal installed between the pressure ring and the drive shaft; A third oil seal installed between the pressure ring and the body; and An appropriate amount of lubricating liquid is filled inside the body. The torque output mechanism of the torque wrench according to claim 9, wherein the right side of the tooth top of each tooth of the upper tooth and the left side of the tooth top of each tooth of the lower tooth respectively have a chamfer. The torque output mechanism of the torque wrench as described in claim 9 further includes: A shock-absorbing washer is installed on the upper end of the second guide rail of the lower tooth. A torque output mechanism of a torque wrench, including: A body with a socket hole on the top end, and a plurality of threads on the lower end surface of the body; A torque scale ring is sleeved outside the upper end of the body and fixed with a nut; An upper tooth is fixed below the socket hole in the body, the upper tooth has a through hole in the center and a plurality of teeth at the bottom, and the through hole corresponds to the socket hole of the body, wherein each tooth The included angle is 10°~90°, and the left side of the tooth top of each tooth has a chamfer; A drive shaft with a fixing hole in the center of the top end, a limiting post is installed in the fixing hole, the upper end wall of the drive shaft has a plurality of first guide rails arranged in a straight direction, the lower end has a driving part, and the outer wall of the driving part is fixed Set up a positioning element; A bolt passes through the through hole of the upper tooth and is screw-locked to the fixing hole of the drive shaft, and at the same time abuts against the limiting post in the fixing hole, so that the upper tooth and the drive shaft can be mutually free Rotating combination The lower tooth is sleeved on the drive shaft and has a plurality of teeth meshing with the upper tooth, and the right side of the tooth top of each of the lower teeth has a chamfer, wherein the inner wall surface of the lower tooth has a straight arrangement The plural second guide rails are used to correspond to the first guide rails of the drive shaft, and a baffle is installed at the lower end of the second guide rail; A plurality of balls are installed between the first guide rails and the second guide rails, so that the lower teeth can move up and down relative to the drive shaft; A first elastic element sleeved on the outside of the drive shaft and pressed against the lower tooth; A pressure ring sleeved on the lower end of the drive shaft and pressed against the lower end of the first elastic element; A torsion adjusting ring with a plurality of threads on the inner wall surface, screwed with the body from the bottom of the body, and the inner bottom of the torsion adjusting ring abuts against the lower end of the pressure ring, whereby the torsion adjusting ring rotates up and down relative to the body And compress the first elastic element through the pressure ring, and the side of the torsion adjusting ring has a fixing hole; and A fixing component is installed in the fixing hole of the torque adjusting ring for fixing the torque adjusting ring and the main body. The torque output mechanism of the torque wrench as described in claim 14, further including: A second elastic element is sleeved outside the first elastic element, and the upper end of the second elastic element abuts against the lower tooth, and the lower end of the second elastic element abuts against the pressure ring. The torque output mechanism of the torque wrench as described in claim 14, further including: A first oil seal installed between the upper tooth and the socket hole of the body; A second oil seal installed between the pressure ring and the drive shaft; A third oil seal installed between the pressure ring and the body; and An appropriate amount of lubricating liquid is filled inside the body. The torque output mechanism of a torque wrench according to claim 14, wherein the fixing component includes: A hollow column welded to the fixing hole on the side of the torque adjusting ring; A copper sleeve with a plurality of threads, installed in the hollow column and occluding the threads of the body; and An adjusting ring fixing screw is screw-locked in the hollow column and pressed against the copper sleeve to fix the torque adjusting ring and the body. The torque output mechanism of the torque wrench as described in claim 14, further including: A gasket installed on the inner side of the bottom of the torque adjusting ring and defining a space with the pressure ring; and A plurality of steel balls are installed in the space defined by the pressure ring and the gasket. The torque output mechanism of the torque wrench according to claim 14, wherein the right side of the tooth top of each tooth of the upper tooth and the left side of the tooth top of each tooth of the lower tooth respectively have a chamfer. The torque output mechanism of the torque wrench as described in claim 14, further including: A shock-absorbing washer is installed on the upper end of the second guide rail of the lower tooth.

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