CN211364049U

CN211364049U - Automatic assembly machine for pencil holder counter weight

Info

Publication number: CN211364049U
Application number: CN201921635479.0U
Authority: CN
Inventors: 赵春香
Original assignee: Zhejiang Meijiada Stationery Co ltd
Current assignee: Zhejiang Meijiada Stationery Co ltd
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2020-08-28
Anticipated expiration: 2029-09-27

Abstract

The utility model provides a penholder balancing weight automatic assembly machine, its includes the base, the support frame, the mounting panel to and feed tray, still include the pay-off piece, balancing weight installation mechanism, and control mechanism. The balancing weight mounting mechanism comprises a material taking unit and a balancing weight mounting unit. The material taking unit comprises a guiding device, a conducting device, a first air cylinder, a connecting rod and a pneumatic clamp. The guide device comprises a guide plate and a guide groove. The transmission device comprises a rotating shaft, a gear, a rack, a transmission plate, a transmission rod and a rotating piece. The counterweight block mounting unit comprises a positioning block and a counterweight block pushing cylinder. The locating piece includes the locating piece main part, the mounting groove. The balancing weight pushing cylinder comprises a pushing cylinder body and a pushing rod. The control mechanism comprises a first control device and a second control device. The automatic assembly machine for the penholder balancing weight improves the quality of the penholder mounting balancing weight, lightens the workload of workers, reduces the cost and improves the production efficiency.

Description

Automatic assembly machine for pencil holder counter weight

Technical Field

The utility model belongs to the technical field of the assembly machine, especially a penholder balancing weight automatic assembly machine.

Background

The pen is a big invention of human beings, and is a tool for writing or drawing. At present, in order to facilitate writing, a producer installs a balancing weight on a penholder, so that the hand feeling of a user when the pen is used is enhanced, and the pen is smooth when writing.

In the past, the assembly work of installing the balancing weight in the pen holder is performed manually, the working efficiency is extremely low, large-scale production cannot be formed, and the labor cost is high. And install the balancing weight in the pen-holder through the manual work, the balancing weight is uneven in the position of pen-holder for some pens of installing the balancing weight can't reach predetermined effect.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a can improve pen-holder balancing weight automatic assembly machine of machining precision to satisfy the industrial demand.

The utility model provides a pen-holder balancing weight automatic assembly machine, its includes a base, two settings are in support frame on the base, a fixed connection is two mounting panel on the support frame, and a feed tray, still include a connection and be in the pay-off piece on the feed tray, a setting is in balancing weight installation mechanism on the base, and a setting is in control mechanism on the balancing weight installation mechanism. The balancing weight installation mechanism comprises a material taking unit and a balancing weight installation unit, wherein the material taking unit is arranged on the installation plate and used for clamping the balancing weight, and the balancing weight installation unit is arranged on the base. The material taking unit comprises a guide device arranged on the mounting plate, a first air cylinder connected with the guide device, a connecting rod fixedly connected to the guide device, and a pneumatic clamp arranged at one end of the base, wherein the connecting rod is close to the base. The guide device comprises a guide plate arranged on the mounting plate and a guide groove arranged on the guide plate. The transmission device comprises a rotating shaft penetrating through the mounting plate, a gear fixedly connected to one end, close to the first air cylinder, of the rotating shaft, a rack arranged on one side of the gear and connected with the first air cylinder, a transmission plate fixedly connected to one end, close to the guide device, of the rotating shaft, a transmission rod fixedly connected to the transmission plate and connected to the connecting rod, and a rotating part arranged at one end of the transmission rod and accommodated in the guide groove. The counterweight block mounting unit comprises a positioning block and a counterweight block pushing cylinder arranged at one end of the positioning block. The positioning block comprises a positioning block main body and a mounting groove arranged on the positioning block main body. The counterweight block pushing cylinder comprises a pushing cylinder main body and a pushing rod which is arranged on the pushing cylinder main body and accommodated in the mounting groove. The control mechanism comprises a first control device arranged on the first air cylinder and a second control device arranged on the counterweight block pushing air cylinder.

Further, the automatic assembly machine for the penholder counterweight block further comprises a detection mechanism arranged on one side of the counterweight block installation mechanism, the detection mechanism comprises a touch rod and a detection main body arranged at one end of the touch rod, the detection main body is a diameter measuring sensor, and the feeding piece, the counterweight block installation mechanism and the detection mechanism are sequentially arranged.

Further, the feeding piece comprises a feeding piece main body, a feeding groove arranged on the feeding piece main body, and two groove-shaped holes respectively arranged on the side wall of the feeding groove.

Further, the counterweight block installation mechanism is arranged between the two support frames, and the movement direction of the counterweight block installation mechanism is the same as the extending direction of the gap between the two support frames.

Furthermore, the counterweight block mounting unit further comprises a first sliding device arranged between the counterweight block mounting unit and the base, the first sliding device comprises a supporting plate arranged on one side of the counterweight block mounting unit, a first guide rail arranged on one side of the supporting plate facing the base, a first sliding block fixedly connected to the base and arranged on the first guide rail, and a second air cylinder arranged on the base and connected with the supporting plate, and the control mechanism further comprises a third control device arranged on the second air cylinder.

Furthermore, get the material unit and still include one and set up on the mounting panel and be in the second slider device of guider one side and one set up the connecting rod is kept away from the stop block subassembly of pneumatic clamp one end, second slider device includes that one sets up second guide rail on the mounting panel, and one sets up second slider on the second guide rail, connecting rod swing joint is in on the second slider.

Furthermore, the limiting block assembly comprises a fixed block fixedly connected to the connecting rod, two limiting blocks arranged on two sides of the fixed block respectively, and two anti-collision rods arranged on the limiting blocks respectively, wherein the outer contour of the fixed block is T-shaped.

Furthermore, the outer contour of the guide groove is inverted U-shaped, and the conduction device further comprises an oval through hole arranged on the transmission plate.

Furthermore, the locating piece still includes two settings and is in the recess of mounting groove both sides, one sets up the locating piece main part is kept away from the baffle of balancing weight top pushing cylinder one end, and one sets up through-hole on the baffle, the center pin of through-hole with the center pin coincidence of mounting groove.

Furthermore, the pneumatic clamp comprises a pneumatic clamp body, two clamping heads symmetrically arranged at one end of the pneumatic clamp body, and an arc-shaped groove arranged on one side of each clamping head, wherein the arc-shaped grooves on the two clamping heads are mutually symmetrical.

Compared with the prior art, the utility model provides a pen-holder balancing weight automatic assembly machine passes through balancing weight installation mechanism installs the balancing weight in the pen-holder. The balancing weight installation mechanism comprises a material taking unit and a balancing weight installation unit, wherein the material taking unit is arranged on the installation plate and used for taking the balancing weight, and the balancing weight installation unit is arranged on the base. The pneumatic clamp of the material taking unit clamps the balancing weight, the first air cylinder drives the conduction device to move, and the conduction device drives the connecting rod and the pneumatic clamp to move between the feeding piece and the balancing weight mounting unit. The material taking unit clamps the balancing weight on the feeding piece on the balancing weight mounting unit. The counterweight block mounting unit comprises a positioning block and a counterweight block pushing cylinder arranged at one end of the positioning block. The pneumatic clamp clamps the balancing weight to the mounting groove of the positioning block, the pushing rod of the balancing weight pushing cylinder is contained in the mounting groove, and the pushing rod moves along the extending direction of the mounting groove so as to push the balancing weight into the pen holder. The automatic assembly machine for the penholder balancing weight improves the quality of the penholder mounting balancing weight, lightens the workload of workers, reduces the cost and improves the production efficiency.

Drawings

Fig. 1 is a schematic view of the front view structure of the automatic assembly machine for pen holder and counterweight blocks provided by the present invention.

Fig. 2 is a rear view structural schematic diagram of the automatic assembling machine for penholder balancing weights in fig. 1.

Fig. 3 is a partially enlarged structural schematic view of the automatic assembly machine for a penholder balancing weight in fig. 2 at a position a.

Fig. 4 is an exploded view of the automatic assembly machine for a shaft weight of fig. 1.

Fig. 5 is a partially enlarged structural schematic diagram of the automatic assembling machine for penholder balancing weights in fig. 4 at a position B.

Fig. 6 is a schematic structural view of a pneumatic clamp in the automatic assembling machine for penholder balancing weights in fig. 1.

Fig. 7 is a schematic structural diagram of a positioning block in the automatic assembling machine for penholder balancing weights in fig. 1.

Detailed Description

Specific examples of the present invention will be described in further detail below. It should be understood that the description herein of embodiments of the invention is not intended to limit the scope of the invention.

As shown in fig. 1 to 7, it is a schematic structural diagram of the automatic assembly machine for pen holder and weight block provided by the present invention. The automatic assembly machine for the penholder counterweight block comprises a base 1, two support frames 2 arranged on the base 1, a mounting plate 3 fixedly connected to the two support frames 2, a feeding disc (not shown), a feeding piece 10 connected to the feeding disc 4, a counterweight block mounting mechanism 20 arranged on the base 1, a control mechanism 30 arranged on the counterweight block mounting mechanism 20, and a detection mechanism 40 arranged on one side of the counterweight block mounting mechanism 20. The automatic assembling machine for penholder counter weight further comprises other functional modules, such as an assembling component, an electrical connecting component and the like, which are well known to those skilled in the art, and will not be described in detail herein.

The base 1 is used for mounting the supporting frame 2 and the counterweight block mounting mechanism 20, and is used for connecting other devices, which is a prior art and will not be described herein,

support frame 2 sets up on the base 1, mounting panel 3 sets up on two support frames 2, and following material unit 21 that gets sets up on the mounting panel 3 support frame 2 and under mounting panel 3's the support, support following material unit 21 that gets to get the material with following material unit 21. The support frame 2 and the mounting plate 3 are both a prior art, and are not described herein again.

The feeding tray (not shown) is used for orderly conveying the balancing weights (not shown) to the feeding member 10, which is a prior art and will not be described herein.

The feeding member 10 comprises a feeding member body 11, a feeding groove 12 arranged on the feeding member body 11, and two groove-shaped holes 13 respectively arranged on the side walls of the feeding groove 12. The balancing weight is accommodated in the feeding groove 12. The clump weights are sequentially conveyed in the feeding groove 12. When the weight block is transferred to the position where the feeding member 10 is provided with the groove-shaped hole 13, the side wall of the feeding member main body 11 does not block the weight block any more, so that the pneumatic clamp 215 described below clamps the weight block.

The counterweight block mounting mechanism 20 comprises a material taking unit 21 which is arranged on the mounting plate 3 and used for clamping the counterweight block, a counterweight block mounting unit 22 arranged on the base 1, and a first sliding device 23 arranged between the counterweight block mounting unit 22 and the base 1. The material taking unit 21 picks up the counter weight block on the feeding member 10 and places the counter weight block on the counter weight block mounting unit 22. Clump weight installation mechanism 20 sets up two between the support frame 2, clump weight installation mechanism 20 direction of motion and two the extending direction in clearance is the same between the support frame 2, in order to prevent support frame 2 hinders clump weight installation mechanism 20 removes.

The material taking unit 21 comprises a guide device 211 arranged on the mounting plate 3, a guide device 212 arranged on the mounting plate 3, a first air cylinder 213 connected with the guide device 212, a connecting rod 214 fixedly connected with the guide device 212, a pneumatic clamp 215 arranged at one end of the connecting rod 214 close to the base 1, a second slide block device 216 arranged on the mounting plate 3 and at one side of the guide device 211, and a limiting component 217 arranged at one end of the connecting rod 214 far away from the pneumatic clamp 215.

The guide 211 includes a guide plate 2111 provided on the mounting plate 3, and a guide groove 2112 provided on the guide plate 2111. The conducting device 212 is partially accommodated in the guiding slot 2112, and under the driving of the first cylinder 213, the conducting device 212 reciprocates along the guiding slot 2112. The guiding groove 2112 has an inverted U-shaped outer contour, which will be described in detail in conjunction with the conduction device 212.

The transmission device 212 includes a rotating shaft 2121 passing through the mounting plate 3, a gear 2122 fixedly connected to an end of the rotating shaft 2121 close to the first cylinder 213, a rack 2123 disposed at one side of the gear 2122 and connected to the first cylinder 213, a driving plate 2124 fixedly connected to an end of the rotating shaft 2121 close to the guiding device 211, a driving rod 2125 disposed on the driving plate 2124 and connected to the connecting rod 214, a rotating member 2126 disposed at one end of the driving rod 2125 and received in the guiding groove 2112, and an oval through hole 2127 disposed on the driving plate 2124. The gear 2122 and the driving plate 2124 are respectively disposed at two ends of the rotating shaft 2121. One end of the rotating member 2126 is connected to the transmission plate 2124, the rotating member 2126 is accommodated in the guide groove 2112, the rack 2123 is connected to the first cylinder 213, the rack 2123 reciprocates under the driving of the first cylinder 213, and the rack 2123 drives the gear 2122 to rotate in a reciprocating manner, so as to drive the rotating shaft 2121, the transmission plate 2124, and the rotating member 2126 to rotate in a reciprocating manner, and the rotating member 2126 moves along the guide groove 2115. The elliptical through hole 2127 accommodates the rotational element 2126, and when the driving plate 2124 drives the rotational element 2126 to rotate, the rotational element 2126 can move in the elliptical through hole 2127, so that the rotational element 212 can move along the guiding groove 2112, and the moving contour becomes an inverted "U" shape. One end of the U-shape extends toward the feeding member 10, and the other end faces the weight block mounting unit 22, so that the pneumatic clamp 215 can clamp the weight block accommodated in the feeding member 10 and place the weight block in the mounting groove 2212.

The first cylinder 213 can drive the rack 2123 to reciprocate along the horizontal direction of the mounting plate 3, and the rack 2123 can drive the gear 2122 and the rotating shaft 2121 to rotate during the movement, so that the rotating shaft 2121 drives the driving plate 2124, the driving rod 2125, and the rotating member 2126 to reciprocate along the guiding groove 2112.

The connecting rod 214 is fixedly connected to the driving rod 2125 of the conducting device 212, and during the movement of the driving rod 2125 along the guiding slot 2112, the driving rod 2125 can drive the connecting rod 214 to move together, so as to drive the pneumatic clamp 215 to clamp the weight block accommodated in the feeding member 10 and place the weight block in the mounting slot 2212.

The pneumatic clamp 215 includes a pneumatic clamp body 2151, two clamp heads 2152 symmetrically disposed at one end of the pneumatic clamp body 2151, and an arcuate slot 2153 disposed on one side of the clamp heads 2152. The arc-shaped grooves 2153 of the two chucks 2152 are symmetrical to each other, and when the pneumatic clamp 215 clamps the counterweight, the counterweight is accommodated in the arc-shaped groove 2153 of the chuck 2152, so that the pneumatic clamp 215 clamps the counterweight stably. The pneumatic clamp 215 is disposed at one end of the connecting rod 214 close to the base 1, and the pneumatic clamp 215 is driven by the connecting rod 214 to clamp the weight block on the feeding member 10 to the weight block mounting unit 22. The pneumatic clamp 215 is one prior art.

The second slider assembly 216 includes a second guide 2161 disposed on the mounting plate 3, and a second slider 2162 disposed on the second guide 2161. The connecting rod 214 is inserted into the second slider 2162. During the movement of the connecting rod 214, the connecting rod 214 drives the second slider 2162 to move along the second guide rail 2161, and the connecting rod 214 can move along the extending direction of the connecting rod 214, so that the pneumatic clamp 215 can move along the extending direction of the connecting rod 214.

The stopper assembly 217 includes a fixed block 2171 fixedly coupled to the connecting rod 214, two stoppers 2172 respectively disposed at both sides of the fixed block 2171, and two anti-collision rods 2173 respectively disposed at the stoppers 2172. The limiting assembly 217 is used for limiting the lowest position of the connecting rod 214 in the descending process. The outer profile of the fixed block 2171 is formed in a "T" shape so that both sides of the fixed block 2171 can abut against the impact prevention bar 2173.

The weight block mounting unit 22 includes a positioning block 221, and a weight block pushing cylinder 222 disposed at one end of the positioning block 221.

The positioning block 221 includes a positioning block main body 2211, a mounting groove 2212 disposed on the positioning block main body 2211, two grooves 2213 disposed on two sides of the mounting groove 2212, a baffle 2214 disposed on an end of the positioning block main body 2211 far from the counterweight block pushing cylinder 222, and a through hole 2215 disposed on the baffle 2214. The central axis of the through hole 2215 coincides with the central axis of the mounting groove 2212, so that when the pen holder is inserted into the through hole 2215, the counter weight block pushing cylinder 222 can push the counter weight block into the pen holder. When the pneumatic clamp 215 clamps the weight block in the mounting groove 2212, one end of the pneumatic clamp 215 is received in the groove 2213, so that the pneumatic clamp 215 stably places the weight block in the mounting groove 2212.

The clump weight pushing cylinder 222 includes a pushing cylinder body 2221 and a pushing rod 2222 disposed on the pushing cylinder body 2221 and received in the mounting groove 2212. The mounting groove 2212 guides the movement direction of the balancing weight and the pushing rod 2222. The pneumatic clamp 215 holds the weight block in the mounting groove 2212, and the pushing rod 2222 reciprocates along the extending direction of the mounting groove 2212 to push the weight block into the pen holder, so that the positions of the weight block in the pen holder are uniform, and the pen holder can achieve a predetermined effect.

The first sliding device 23 includes a supporting plate 231 disposed on one side of the weight block mounting unit 20, a first guide rail 232 disposed on one side of the supporting plate 231 facing the base 1, a first slider 233 fixedly connected to the base 1 and disposed on the first guide rail 232, and a second cylinder 234 disposed on the base 1 and connected to the supporting plate 231. The direction of the first guide rail 232 and the first slider 233 is the same as the extending direction of the second cylinder 234, so that the second cylinder 234 drives the supporting plate 231 to move, thereby driving the weight block mounting unit 20 to move.

The control mechanism 30 includes a first control device 31 provided on the first cylinder 213, a second control device 32 provided on the weight block pushing cylinder 222, and a third control device 33 provided on the second cylinder 234. When the device is used, the third control device 33 controls the second air cylinder 234 to move the counterweight block mounting unit 22 toward the pen holder, the first control device 31 controls the first air cylinder 213 to drive the pneumatic clamp 215 to move, so that the pneumatic clamp 215 clamps the counterweight block in the feeding member 10, the counterweight block is placed in the mounting groove 2212 of the positioning block 221, the second control device 32 controls the counterweight block pushing air cylinder 222 to push the counterweight block, the counterweight block is pushed into the pen holder, and finally, the first control device 31 and the counterweight block pushing air cylinder 222 recover to the initial position.

The detecting mechanism 40 includes a touch lever 41, and a detecting body 42 disposed at one end of the touch lever 41. After the counterweight block is installed in the pen holder by the counterweight block installation mechanism 20, the pen holder is transmitted to the detection mechanism 40, so that the counterweight block is not installed on the pen holder. When the detection mechanism 40 detects that the balancing weight is not installed on the penholder, an alarm is given. In this embodiment, the feeding member 10, the weight block mounting mechanism 20, and the detecting mechanism 40 are sequentially arranged, so as to mount the weight block in the pen holder.

Compared with the prior art, the utility model provides a pen-holder balancing weight automatic assembly machine passes through balancing weight installation mechanism 20 installs the balancing weight in the pen-holder. The counterweight block mounting mechanism 20 comprises a material taking unit 21 which is arranged on the mounting plate 3 and used for clamping the counterweight block, and a counterweight block mounting unit 22 arranged on the base 1. The pneumatic clamp 215 of the material taking unit 21 clamps the counterweight, the first air cylinder 213 drives the conducting device 212 to move, and the conducting device 212 drives the connecting rod 214 and the pneumatic clamp 215 to move between the feeding member 10 and the counterweight mounting unit 22. The material taking unit 21 clamps the weight block on the feeding member 10 on the weight block mounting unit 22. The weight block mounting unit 22 includes a positioning block 221, and a weight block pushing cylinder 222 disposed at one end of the positioning block 221. The pneumatic clamp 215 clamps the weight block into the mounting groove 2212 of the positioning block 221, the pushing rod 2222 of the weight block pushing cylinder 222 is accommodated in the mounting groove 2212, and the pushing rod 2222 moves along the extending direction of the mounting groove 2212 to push the weight block into the pen holder. The automatic assembly machine for the penholder balancing weight improves the quality of the penholder mounting balancing weight, lightens the workload of workers, reduces the cost and improves the production efficiency.

The above description is only for the preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention, and any modification, equivalent replacement or improvement within the spirit of the present invention is encompassed by the claims of the present invention.

Claims

1. The utility model provides a pen-holder balancing weight automatic assembly machine, includes a base, two settings are in support frame on the base, a fixed connection is two mounting panel on the support frame to and a feeding tray, its characterized in that: the automatic assembly machine for the penholder and the balancing weight further comprises a feeding piece connected to the feeding disc, a balancing weight mounting mechanism arranged on the base and a control mechanism arranged on the balancing weight mounting mechanism, wherein the balancing weight mounting mechanism comprises a material taking unit arranged on the mounting plate and used for clamping and taking the balancing weight and a balancing weight mounting unit arranged on the base, the material taking unit comprises a guide device arranged on the mounting plate, a transmission device arranged on the mounting plate, a first air cylinder connected with the transmission device, a connecting rod fixedly connected to the transmission device and a pneumatic clamp arranged at one end, close to the base, of the connecting rod, the guide device comprises a guide plate arranged on the mounting plate, the guide groove is arranged on the guide plate, the conduction device comprises a rotating shaft which is arranged on the mounting plate in a penetrating way, a gear which is fixedly connected with one end, close to the first air cylinder, of the rotating shaft, a rack which is arranged on one side of the gear and connected with the first air cylinder, a transmission plate which is fixedly connected with one end, close to the guide device, of the rotating shaft, a transmission rod which is fixedly connected with the transmission plate and connected with the connecting rod, and a rotating part which is arranged at one end of the transmission rod and accommodated in the guide groove, the counterweight block mounting unit comprises a positioning block and a counterweight block pushing air cylinder which is arranged at one end of the positioning block, the positioning block comprises a positioning block main body and a mounting groove which is arranged on the positioning block main body, and the counterweight block pushing air cylinder comprises a pushing, and the pushing rod is arranged on the pushing cylinder body and is accommodated in the mounting groove, and the control mechanism comprises a first control device arranged on the first cylinder and a second control device arranged on the balancing weight pushing cylinder.

2. The automatic assembling machine for penholder balancing weights as claimed in claim 1, wherein: the automatic assembly machine for the penholder and the balancing weight further comprises a detection mechanism arranged on one side of the balancing weight installation mechanism, the detection mechanism comprises a touch rod and a detection main body arranged at one end of the touch rod, the detection main body is a diameter measuring sensor, and the feeding piece, the balancing weight installation mechanism and the detection mechanism are sequentially arranged.

3. The automatic assembling machine for penholder balancing weights as claimed in claim 1, wherein: the feeding piece comprises a feeding piece main body, a feeding groove arranged on the feeding piece main body and two groove-shaped holes respectively arranged on the side wall of the feeding groove.

4. The automatic assembling machine for penholder balancing weights as claimed in claim 1, wherein: the setting of balancing weight installation mechanism is two between the support frame, balancing weight installation mechanism direction of motion is the same with two the extending direction in clearance between the support frame.

5. The automatic assembling machine for penholder balancing weights as claimed in claim 1, wherein: the counterweight block mounting unit further comprises a first sliding device arranged between the counterweight block mounting unit and the base, the first sliding device comprises a supporting plate arranged on one side of the counterweight block mounting unit, a first guide rail arranged on one side of the base and facing the supporting plate, a first sliding block fixedly connected to the base and arranged on the first guide rail, a second air cylinder arranged on the base and connected with the supporting plate, and a third control device arranged on the second air cylinder.

6. The automatic assembling machine for penholder balancing weights as claimed in claim 1, wherein: get the material unit and still include a setting on the mounting panel and be in the second slider device of guider one side, and one sets up the connecting rod is kept away from the stop block subassembly of pneumatic clamp one end, second slider device includes that one sets up second guide rail on the mounting panel, and one sets up second slider on the second guide rail, connecting rod swing joint be in on the second slider.

7. The automatic assembling machine for penholder balancing weights as claimed in claim 6, wherein: the limiting block assembly comprises a fixed block fixedly connected to the connecting rod, two limiting blocks arranged on two sides of the fixed block respectively, and two anti-collision rods arranged on the limiting blocks respectively, wherein the outer contour of the fixed block is T-shaped.

8. The automatic assembling machine for penholder balancing weights as claimed in claim 1, wherein: the guiding groove is U-shaped with an inverted outline, and the conduction device further comprises an oval through hole arranged on the transmission plate.

9. The automatic assembling machine for penholder balancing weights as claimed in claim 1, wherein: the positioning block further comprises two grooves formed in two sides of the mounting groove, a baffle arranged at one end, far away from the counterweight block pushing cylinder, of the positioning block main body and a through hole arranged on the baffle, and the central axis of the through hole is overlapped with the central axis of the mounting groove.

10. The automatic assembling machine for penholder balancing weights as claimed in claim 1, wherein: the pneumatic clamp comprises a pneumatic clamp body, two clamping heads symmetrically arranged at one end of the pneumatic clamp body, and an arc-shaped groove arranged on one side of each clamping head, wherein the arc-shaped grooves on the two clamping heads are mutually symmetrical.