Full-automatic flat-handle acupuncture needle assembly machine

Abstract

The utility model relates to the field of automatic assembling machines, in particular to a full-automatic flat handle acupuncture needle assembling machine which comprises a machine base, a tube feeding station, a needle threading station, a drawing station, a cutting station and a blanking station are arranged on the surface of the machine base, and the stations are connected through a conveying platform. The conveying platform drives the bourdon tube to enter a tube feeding station, a needle threading station, a drawing station, a cutting station and a blanking station in sequence, a tube body feeding assembly is arranged in the tube feeding station, a needle feeding assembly and a needle threading assembly are arranged in the needle threading station, a first wave pressing mold and a second wave pressing mold are arranged in the drawing station, and a cutting assembly is arranged in the cutting station. A punching die is arranged in the cutting station, and a finished product platform is arranged in the blanking station, so that full-process automation of acupuncture needle production is realized, the problem of quality fluctuation of manual assembly is solved, the production efficiency is remarkably improved, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to automatic assembly machine field, especially full -automatic flat handle acupuncture needle assembly machine. BACKGROUND

[0002] As an important component of traditional Chinese medicine therapy, acupuncture, the manufacturing process of acupuncture needle, its core medical instrument, directly affects the clinical treatment effect. The traditional acupuncture needle is composed of a needle body and a needle holding device. With the development of modern acupuncture instruments, spring tube type acupuncture needles with elastic buffer function have become mainstream products due to their stable operation and easy control of penetration depth.

[0003] The flat handle acupuncture needle is assembled by a stainless steel needle body and a spiral spring tube. The front end of the needle body needs to be formed into a sharp needle tip through a special process, and the tail end is formed into a wave pattern through a wave pressing process and is clamped with the inner wall of the spring tube. The spring tube plays the role of fixing the needle body and providing elastic support.

[0004] In the existing production process, key processes such as needle body insertion, wave pressing forming, and needle tip forming mainly rely on manual operation. The operator needs to manually complete more than ten processes such as spring tube feeding, needle body insertion, drawing positioning, wave stamping, and needle tip cutting. There are quality defects such as low assembly efficiency, poor product consistency, uneven gap between the needle body and the spring tube, large wave forming size deviation, and unstable sharpness of the tip, which seriously restrict the production capacity improvement and product standardization process. INVENTION CONTENTS

[0005] In order to overcome the deficiencies of the prior art, the full-automatic flat handle acupuncture needle assembly machine can effectively solve the technical problems of low efficiency and unstable quality caused by manual assembly.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] The full-automatic flat handle acupuncture needle assembly machine comprises a machine base, a pipe feeding station, a needle insertion station, a drawing station, a cutting station, and a material falling station are arranged on the surface of the machine base, the stations are connected through a conveying platform, the conveying platform comprises a material carrying plate, a lifting cylinder, a sliding base, and a driving source, the lifting cylinder is vertically installed on the surface of the sliding base, the sliding base is installed on the surface of the machine base, the driving source is in transmission connection with the sliding base, the material carrying plate is connected with the extension rod of the lifting cylinder, the driving source can drive the sliding base to translate, and the sliding base drives the sliding base to move between the stations;

[0008] The pipe body feeding assembly is arranged in the pipe feeding station, and the pipe body feeding assembly comprises a vibrating disc, a transfer platform and a feeding clamp jaw. The transfer platform is connected with the vibrating disc. The surface of the transfer platform is provided with a pipe groove. The spring pipe is moved to the pipe groove through the vibrating disc. The feeding clamp jaw is located above the transfer platform and corresponds to the pipe groove. The feeding clamp jaw can be lifted relative to the transfer platform, and the feeding clamp jaw can be translated between the transfer platform and the loading plate.

[0009] The needle feeding assembly and the needle penetrating assembly are arranged in the needle penetrating station. The needle feeding assembly comprises a storage plate, a needle feeding plate and a feeding cylinder. The surface of the storage plate is provided with a needle storage groove. The needle feeding plate is located at the bottom surface of the needle storage groove and is provided with a needle feeding groove. The needle feeding groove can only accommodate a single needle body. The feeding cylinder is connected with the needle feeding plate and can drive the needle feeding plate to rise in the needle storage groove. The needle penetrating assembly comprises a needle pushing plate and a needle pushing track. The needle pushing plate is connected with the sliding table of the needle pushing track. The needle pushing track can drive the needle pushing plate to approach the needle feeding plate. The needle pushing plate can push the needle body in the needle feeding groove to penetrate into the spring pipe in the loading plate in the needle penetrating station.

[0010] The first wave pressing die and the second wave pressing die are arranged in the drawing station. The first wave pressing die and the second wave pressing die press waves on both ends of the needle body respectively. The first wave pressing die is installed on the surface of the machine base through the push-pull cylinder. The push-pull cylinder can drive the first wave pressing die to pull the needle body.

[0011] The punching die is arranged in the cutting station. The punching die is used for cutting the front end wave of the needle body punched out in the drawing station, so that a sharp needle head is formed at the front end of the needle body.

[0012] The finished product platform is arranged in the blanking station. The finished product platform is connected with the conveying platform. The finished product platform is provided with an avoiding opening facing the loading plate and aligned with the loading plate. The loading plate can be moved into the avoiding opening through the sliding base.

[0013] Further, the transfer platform is provided with a pipe aligning plate at one end away from the vibrating disc. The material aligning plate is located on the side of the loading plate away from the needle feeding assembly. The material aligning plate is provided with a needle body slot at one end close to the loading plate. The material aligning plate is connected with the machine base through the translation cylinder. The needle aligning plate is located on the side of the loading plate away from the punching die and corresponds to the punching die.

[0014] Further, the loading plate is provided with a material pressing strip above. The material pressing strip is connected with the machine base through the guide rod and the guide sleeve. The material pressing strip can move along the guide sleeve axis. The outer side of the guide rod is provided with an elastic element. The elastic element can continuously provide a downward pressure to the material pressing strip.

[0015] Further, a guide assembly is arranged between the needle feeding assembly and the conveying platform, the guide assembly comprises a fixed plate and a movable plate, the movable plate is capable of lifting relative to the fixed plate, and the movable plate and the fixed plate are both provided with a guide slot at opposite ends, and the guide slots combine to form a guide opening after the movable plate and the fixed plate are closed.

[0016] Further, the punching die comprises an upper die plate, a lower die plate and a cutting tool, the cutting tool is arranged at one end of the upper die plate and the lower die plate opposite to each other, and the surface of the lower die plate is provided with a waste groove, the waste groove is located at one end of the cutting tool away from the conveying platform.

[0017] Further, the surface of the material carrying plate is provided with a plurality of equidistantly arranged positioning grooves for carrying the spring tubes in each station.

[0018] Further, the sliding base comprises a movable seat, a sliding rail and a sliding block, the sliding rail is fixedly installed on the surface of the machine base, the movable seat is connected with the sliding rail through the sliding block, and the bottom end of the lifting cylinder is installed on the surface of the movable seat.

[0019] Further, the driving source comprises a driving motor, two synchronous wheels and a synchronous belt, the two synchronous wheels are arranged, the driving motor is in transmission connection with any one of the two synchronous wheels, the two synchronous wheels are connected through the synchronous belt, the sliding base is connected with the synchronous belt through a synchronous block, and the synchronous block is arranged on the synchronous teeth engaged with the synchronous belt.

[0020] Compared with the prior art, the acupuncture needle production full-process automation is realized, the spring tubes are sequentially fed into the pipe feeding station, the needle feeding station, the drawing station, the cutting station and the material falling station by the conveying platform, the pipe body feeding assembly adopts the vibration disc directional arrangement and the jaw precise positioning technology, the automatic spring tube feeding is realized, the needle feeding and needle threading assembly ensures the single needle precise pipe threading through the needle feeding slot limiting and the needle pushing plate, the second wave pressing die presses the wave lines matched with the spring tubes at the tail of the needle body, the first wave pressing die presses the wave lines facilitating the needle body drawing, the first wave pressing die pulls the needle body rear end into the spring tube by the pushing and pulling cylinder, the punching die cuts the wave lines facilitating the needle body drawing, the front end of the needle body forms a sharp needle head, and finally the finished product is moved to the finished product platform through the material carrying plate to complete the discharging. The quality fluctuation problem of manual assembly is solved, the production efficiency is significantly improved, and the production cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structural schematic view of the utility model;

[0022] Figure 2 It is a structural schematic view of the conveying platform in the utility model;

[0023] Figure 3 It is a structural schematic view of the pipe body feeding assembly in the utility model

[0024] Figure 4 It is the structure schematic view of the needle feeding assembly in the utility model;

[0025] Figure 5 It is the structure schematic view of the guiding assembly in the utility model;

[0026] Figure 6 It is the structure schematic view of the needle threading assembly in the utility model;

[0027] Figure 7 It is the structure schematic view of the first wave pressing mould and the second wave pressing mould in the utility model;

[0028] Figure 8 It is the structure schematic view of the punching die in the utility model;

[0029] Figure 9 It is the structure schematic view of the finished product platform in the utility model;

[0030] Marked number in drawing: 1-machine base, 2-transportation platform, 201-charge plate, 202-lifting cylinder, 203-movable seat, 204-slideway, 205-slideway block, 206-driving motor, 207-synchronous wheel, 208-synchronous belt, 209-synchronous block, 3-tube body loading assembly, 301-vibrating disc, 302-transfer platform, 303-loading clamp jaw, 4-needle feeding assembly, 401-charge plate, 402-needle feeding plate, 403-loading cylinder, 404-fixed plate, 405-movable plate, 406-guiding groove, 5-needle threading assembly, 501-needle pushing plate, 502-needle pushing track, 6-first wave pressing mould, 7-second wave pressing mould, 8-punching die, 801-upper die plate, 802-lower die plate, 803-cutting tool, 804-waste groove, 9-finished product platform, 901-avoidance opening, 10-pushing and pulling cylinder. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0032] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model. Figures 1-9 The full-automatic flat handle acupuncture needle assembling machine of the utility model will be described in detail as follows:

[0033] The full-automatic flat handle acupuncture needle assembly machine comprises a base 1, the surface of the base 1 is provided with a pipe feeding station, a needle threading station, a drawing station, a cutting station and a blanking station, the stations are connected through a conveying platform 2, the conveying platform 2 comprises a material loading plate 201, a lifting cylinder 202, a sliding base and a driving source, the lifting cylinder 202 is vertically installed on the surface of the sliding base, the sliding base is installed on the surface of the base 1, the driving source is in transmission connection with the sliding base, the material loading plate 201 is connected with the telescopic rod of the lifting cylinder 202, the driving source can drive the sliding base to translate, the sliding base drives the sliding base to move between the stations, the surface of the material loading plate 201 is provided with a plurality of equidistantly arranged positioning grooves, the positioning grooves are used for bearing the spring tubes in each station, the sliding base comprises a movable seat 203, a sliding rail 204 and a sliding block 205, the sliding rail 204 is fixedly installed on the surface of the base 1, the movable seat 203 is connected with the sliding rail 204 through the sliding block 205, and the bottom end of the lifting cylinder 202 is installed on the surface of the movable seat 203. The driving source comprises a driving motor 206, two synchronous wheels 207 and a synchronous belt 208, the two synchronous wheels 207 are provided, the driving motor 206 is in transmission connection with any one of the two synchronous wheels 207, the two synchronous wheels 207 are connected through the synchronous belt 208, the sliding base is connected with the synchronous belt 208 through a synchronous block 209, the synchronous block 209 is provided in the synchronous tooth that is engaged with the synchronous belt 208, the sliding rail 204 guarantees the straightness of horizontal movement, and the transmission of the synchronous belt 208 eliminates the displacement cumulative error caused by the gear gap. The engagement structure of the synchronous tooth and the synchronous block 209 realizes instantaneous response when the material loading plate 201 starts and stops.

[0034] A pressing strip is arranged above the material loading plate 201, the pressing strip is connected with the base 1 through a guide rod and a guide sleeve, the pressing strip can move along the axis of the guide sleeve, an elastic element is arranged outside the guide rod, the elastic element can continuously provide a pressing force to the pressing strip, the pressing strip and the elastic element constitute a constant pressure mechanism, a flexible pressing force is continuously applied in the movement process of the material loading plate 201, the displacement risk of the spring tube caused by vibration or inertia is eliminated, and the deformation of the pipe body caused by rigid clamping is avoided. The linear sliding design of the guide rod and the guide sleeve ensures that the pressing force is uniformly distributed, and the stability of multi-station machining is improved.

[0035] A pipe body feeding assembly 3 is arranged in the pipe feeding station, the pipe body feeding assembly 3 comprises a vibrating disc 301, a transfer platform 302 and a feeding clamp jaw 303, the transfer platform 302 is in butt joint with the vibrating disc 301, the surface of the transfer platform 302 is provided with a pipe groove, the spring tube is moved into the pipe groove through the vibrating disc 301, the feeding clamp jaw 303 is located above the transfer platform 302 and corresponds to the pipe groove, the feeding clamp jaw 303 can be lifted relative to the transfer platform 302, and the feeding clamp jaw 303 can translate between the transfer platform 302 and the material loading plate 201.

[0036] The needle threading station is provided with a needle feeding assembly 4 and a needle threading assembly 5. The needle feeding assembly 4 comprises a storage plate 401, a needle feeding plate 402 and a feeding cylinder 403. The surface of the storage plate 401 is provided with a needle storage groove. The needle feeding plate 402 is located at the bottom surface of the needle storage groove and is provided with a needle feeding groove. The needle feeding groove can only accommodate a single needle body. The feeding cylinder 403 is connected with the needle feeding plate 402 and can drive the needle feeding plate 402 to rise in the needle storage groove. The needle threading assembly 5 comprises a needle pushing plate 501 and a needle pushing track 502. The needle pushing plate 501 is connected with the sliding table of the needle pushing track 502. The needle pushing track 502 can drive the needle pushing plate 501 to approach the needle feeding plate 402. The needle pushing plate 501 can push the needle body in the needle feeding groove to penetrate into the spring tube of the carrier plate 201 located in the needle threading station. A guide assembly is arranged between the needle feeding assembly 4 and the conveying platform 2. The guide assembly comprises a fixed plate 404 and a movable plate 405. The movable plate 405 can be lifted relative to the fixed plate 404. The movable plate 405 and the fixed plate 404 are both provided with a guide groove 406 at the opposite end. The guide grooves 406 are combined to form a guide opening after the movable plate 405 and the fixed plate 404 are combined. The movable plate 405 and the fixed plate 404 form a lifting type guide assembly. Before the needle is threaded, the guide opening matching the diameter of the needle body is formed by combining the movable plate 405 and the fixed plate 404, so as to forcibly correct the coincidence degree of the axis of the needle body and the center line of the spring tube, solve the problem of flexion jamming when the slender needle body penetrates, and greatly improve the success rate of needle threading.

[0037] The drawing station is provided with a first wave pressing die 6 and a second wave pressing die 7. The first wave pressing die 6 and the second wave pressing die 7 press waves on both ends of the needle body, respectively. The first wave pressing die 6 is installed on the surface of the machine base 1 through a push-pull cylinder 10. The push-pull cylinder 10 can drive the first wave pressing die 6 to pull the needle body.

[0038] The cutting station is provided with a punching die 8. The punching die 8 is used for cutting the front end wave of the needle body punched out in the drawing station, so as to form a sharp needle head at the front end of the needle body. The punching die 8 comprises an upper die plate 801, a lower die plate 802 and a cutting tool 803. The cutting tool 803 is arranged at the opposite end of the upper die plate 801 and the lower die plate 802. The surface of the lower die plate 802 is provided with a waste groove 804. The waste groove 804 is located at the end of the cutting tool 803 away from the conveying platform 2. The lower die plate 802 of the punching die 8 is integrated with the waste groove 804. After the cutting tool 803 completes the needle tip forming, the front end wave waste directly slides along the inclined waste groove 804 to the waste collecting box, avoiding the waste accumulation to interfere with the subsequent processing.

[0039] The blanking station is provided with a finished product platform 9. The finished product platform 9 is connected with the conveying platform 2. The finished product platform 9 is provided with an avoiding opening 901 facing the carrier plate 201 and aligned with the carrier plate 201. The carrier plate 201 can be moved into the avoiding opening 901 through a sliding base.

[0040] The transfer platform 302 is provided with a pipe aligning plate away from one end of the vibration disc 301, a material aligning plate is arranged in the needle inserting station, a needle aligning plate is arranged in the cutting station, the material aligning plate is located on the side of the material loading plate 201 away from the needle feeding assembly 4, the needle aligning plate is located on the side of the material loading plate 201 away from the punching die 8, the needle aligning plate is corresponded to the punching die 8, the pipe aligning plate, the material aligning plate and the needle aligning plate are controlled by the translational cylinder, the axial alignment of the spring tube in the transfer platform 302, the radial positioning of the needle body in the needle inserting station and the accurate tool alignment of the needle tip in the cutting station are realized. The structure effectively eliminates the assembly gap deviation of the needle body and the spring tube, prevents the needle insertion deflection or the cutting misplacement, and guarantees the consistency of the needle tip forming angle.

[0041] Working process: the vibration disc 301 transports the spring tube to the transfer platform 302, the spring tube in the pipe groove is clamped by the loading clamp 303 and moved to the positioning groove of the material loading plate 201, the material loading plate 201 is lifted by the lifting cylinder 202, the driving motor 206 is started to drive the movable seat 203 to translate the material loading plate 201, the spring tube is moved to the needle inserting station, the material loading plate 201 is lowered by the lifting cylinder 202, the spring tube is aligned with the needle body, the needle body in the needle storage groove falls into the needle feeding groove, the needle body is aligned with the guide opening by lifting the needle feeding plate 402, the needle body is pushed through the needle body into the spring tube by the needle pushing plate 501, the material loading plate 201 is lifted again and moves the spring tube after needle insertion to the drawing station, the second wave pressing die 7 presses the wave part at the tail of the needle body, the first wave pressing die 6 presses the wave part at the head of the needle body, the first wave pressing die 6 moves backward, the wave part at the tail of the needle body is drawn into the spring tube through the wave part at the head of the needle body, the material loading plate 201 moves the spring tube to the cutting station, the wave part at the head of the needle body is cut off by the punching die 8, and finally the material loading plate 201 moves the product to the finished product platform 9.

[0042] It is apparent for those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, and the present application can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the foregoing embodiments should be considered as exemplary and not limiting, and the scope of the present application is defined by the appended claims rather than the foregoing description, and all changes falling within the meaning and range of equivalents of the elements of the claims are intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims to which they are involved.

Claims

1. A full-automatic flat handle acupuncture needle assembling machine, comprising a machine base, characterized in that: The surface of the base is provided with a pipe feeding station, a needle penetrating station, a drawing station, a cutting station and a blanking station, the stations are connected through a conveying platform, the conveying platform comprises a loading plate, a lifting cylinder, a sliding base and a driving source, the lifting cylinder is vertically installed on the surface of the sliding base, the sliding base is installed on the surface of the base, the driving source is in transmission connection with the sliding base, the loading plate is connected with the telescopic rod of the lifting cylinder, and the driving source can drive the sliding base to translate, and the sliding base drives the sliding base to move between the stations; A pipe body feeding assembly is arranged in the pipe feeding station, the pipe body feeding assembly comprises a vibrating disc, a transfer platform and a feeding clamp jaw, the transfer platform is in butt joint with the vibrating disc, the surface of the transfer platform is provided with a pipe groove, a spring pipe is moved into the pipe groove through the vibrating disc, the feeding clamp jaw is located above the transfer platform and corresponds to the pipe groove, the feeding clamp jaw can be lifted relative to the transfer platform, and the feeding clamp jaw can translate between the transfer platform and the loading plate; A needle feeding assembly and a needle penetrating assembly are arranged in the needle penetrating station, the needle feeding assembly comprises a storage plate, a needle feeding plate and a feeding cylinder, the surface of the storage plate is provided with a needle storage groove, the needle feeding plate is located on the bottom surface of the needle storage groove and is provided with a needle feeding groove, the needle feeding groove can accommodate only a single needle body, and the feeding cylinder is connected with the needle feeding plate and can drive the needle feeding plate to rise in the needle storage groove, the needle penetrating assembly comprises a needle pushing plate and a needle pushing track, the needle pushing plate is connected with the sliding table of the needle pushing track, and the needle pushing track can drive the needle pushing plate to approach the needle feeding plate, and the needle pushing plate can drive the needle body in the needle feeding groove to penetrate into the spring pipe in the loading plate in the needle penetrating station; First and second wave pressing dies are arranged in the drawing station, the first and second wave pressing dies press waves on two ends of the needle body respectively, the first wave pressing die is installed on the surface of the base through a push-pull cylinder, and the push-pull cylinder can drive the first wave pressing die to draw the needle body; A punching die is arranged in the cutting station, the punching die is used for cutting the front end wave of the needle body punched out in the drawing station, so that a sharp needle head is formed at the front end of the needle body; A finished product platform is arranged in the blanking station, the finished product platform is in butt joint with the conveying platform, the finished product platform is provided with an avoiding opening facing the loading plate and aligned with the loading plate, and the loading plate can move into the avoiding opening through the sliding base.

2. The fully automatic flat handle acupuncture needle assembly machine according to claim 1, characterized in that: One end of the transfer platform away from the vibrating disc is provided with a pipe aligning plate, a material aligning plate is arranged in the needle penetrating station, and a needle aligning plate is arranged in the cutting station, the material aligning plate is located on the side of the loading plate away from the needle feeding assembly, one end of the material aligning plate close to the loading plate is provided with a needle body slot, the material aligning plate is connected with the base through a translation cylinder, and the needle aligning plate is located on the side of the loading plate away from the punching die and corresponds to the punching die.

3. The fully automatic flat handle acupuncture needle assembly machine according to claim 1, characterized in that: A material pressing strip is arranged above the loading plate, the material pressing strip is connected with the base through a guide rod and a guide sleeve, the material pressing strip can move along the axis of the guide sleeve, an elastic member is arranged on the outside of the guide rod, and the elastic member can continuously provide a downward pressure to the material pressing strip.

4. The fully automatic flat handle acupuncture needle assembly machine according to any one of claims 1-3, characterized in that: A guide assembly is arranged between the needle feeding assembly and the conveying platform, the guide assembly comprises a fixed plate and a movable plate, the movable plate can be lifted relative to the fixed plate, the movable plate and the fixed plate are both provided with guide grooves at the opposite ends, and the guide grooves are combined to form a guide opening after the movable plate and the fixed plate are combined.

5. The fully automatic flat handle acupuncture needle assembly machine according to any one of claims 1-3, characterized in that: The punching die comprises an upper die plate, a lower die plate and a cutting tool, the cutting tool is arranged at the opposite end of the upper die plate and the lower die plate, and the surface of the lower die plate is provided with a waste groove, which is located at the end of the cutting tool away from the conveying platform.

6. The fully automatic flat handle acupuncture needle assembly machine according to any one of claims 1-3, characterized in that: The surface of the carrier plate is provided with a plurality of equidistant positioning grooves for carrying the spring tubes in each station.

7. The fully automatic flat handle acupuncture needle assembly machine according to any one of claims 1-3, characterized in that: The sliding base comprises a movable seat, a sliding rail and a sliding block, the sliding rail is fixedly installed on the surface of the base, the movable seat is connected with the sliding rail through the sliding block, and the bottom end of the lifting cylinder is installed on the surface of the movable seat.

8. The fully automatic flat handle acupuncture needle assembly machine according to any one of claims 1-3, characterized in that: The driving source comprises a driving motor, two synchronous wheels and a synchronous belt, the two synchronous wheels are drivingly connected with any one of the two synchronous wheels, the two synchronous wheels are connected through the synchronous belt, the sliding base is connected with the synchronous belt through a synchronous block, and the synchronous block is arranged on the synchronous teeth engaged with the synchronous belt.

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