阅读说明：本技术 一种曲腕机的后拖轮驱动结构 (Rear tug driving structure of wrist bending machine ) 是由 毛建荣 于 2020-05-15 设计创作，主要内容包括：本发明提供了一种曲腕机的后拖轮驱动结构,属于缝纫设备技术领域。它解决了现有曲腕机的后拖轮驱动结构组成复杂,使用成本高,以及后拖轮驱动结构和曲腕机的其它结构不能同步运行等技术问题。曲腕机包括上轴和驱动电机,本后拖轮驱动结构包括安装架、拖布轮组件、拖布皮带以及偏心连杆,上轴的一侧设有仅能够单向转动的驱动轴,驱动轴上套设有驱动曲柄且驱动曲柄与驱动轴之间通过单向轴承一相连接,偏心连杆的外端与驱动曲柄的外端通过曲柄销相铰接；驱动轴的一端与拖布轮组件相连接且能够带动套设在拖布轮组件上的拖布皮带运转。本发明中的后拖轮驱动结构组成简单,降低了使用成本,且实现了后拖轮驱动结构和曲腕机上的其它结构同步运行。(The invention provides a rear tug driving structure of a wrist bending machine, and belongs to the technical field of sewing equipment. The rear tug driving structure solves the technical problems that the rear tug driving structure of the existing bent wrist machine is complex in composition and high in use cost, and other structures of the rear tug driving structure and the bent wrist machine cannot run synchronously. The wrist bending machine comprises an upper shaft and a driving motor, the rear tug driving structure comprises an installation frame, a mop wheel assembly, a mop belt and an eccentric connecting rod, a driving shaft which can only rotate in a single direction is arranged on one side of the upper shaft, a driving crank is sleeved on the driving shaft and connected with the driving shaft through a one-way bearing I, and the outer end of the eccentric connecting rod is hinged with the outer end of the driving crank through a crank pin; one end of the driving shaft is connected with the mop wheel component and can drive a mop belt sleeved on the mop wheel component to run. The rear tug driving structure is simple in composition, the use cost is reduced, and the synchronous operation of the rear tug driving structure and other structures on the wrist bending machine is realized.)

1. The rear tug driving structure of the wrist bending machine comprises an upper shaft (1) and a driving motor (2) for driving the upper shaft (1) to rotate, and is characterized in that the rear tug driving structure comprises an installation frame (3), a mop wheel assembly (4) arranged on the installation frame (3), a mop belt (5) sleeved on the mop wheel assembly (4) and an eccentric connecting rod (6) sleeved on the upper shaft (1), a driving shaft (7) only capable of rotating in one direction is arranged on one side of the upper shaft (1), a driving crank (8) is sleeved on the driving shaft (7), the driving crank (8) is connected with the driving shaft (7) through a first one-way bearing (9), and the outer end of the eccentric connecting rod (6) is hinged with the outer end of the driving crank (8) through a crank pin (10); one end of the driving shaft (7) is connected with the mop cloth wheel component (4) and can drive the mop cloth belt (5) sleeved on the mop cloth wheel component (4) to run.

2. The rear tug driving structure of the wrist bending machine according to claim 1, wherein a stop cam (11) is eccentrically sleeved on the upper shaft (1), an adjusting cam (12) is eccentrically sleeved at one end of the stop cam (11), the inner end of the eccentric connecting rod (6) is sleeved on the outer peripheral surface of one end of the stop cam (11) and is circumferentially and fixedly connected with the outer peripheral surface of the one end of the stop cam (11); the other end peripheral face of locking cam (11) has ring gear (11a), adjust cam (12) orientation mounting groove (12a) have been seted up on the side of ring gear (11a), sliding fit is equipped with locking plate (13) in mounting groove (12a), the one end of locking plate (13) have with ring gear (11a) engaged with rack (13 a).

3. The rear tug driving structure of a wrist bending machine according to claim 2, wherein a first needle pitch positioning pin (14) is arranged on the peripheral surface of the stop cam (11), a second needle pitch positioning pin (15) is arranged on the side surface of the adjusting cam (12), and the first needle pitch positioning pin (14) can abut against the second needle pitch positioning pin (15) when the stop cam (11) and the adjusting cam (12) rotate relatively; the outer side of the stop plate (13) is further provided with an adjusting pin (16) which enables the gear ring (11a) and the rack (13a) to be kept meshed, a spring (17) is sleeved on the adjusting pin (16), and the inner end of the adjusting pin (16) is right opposite to the stop plate (13).

4. The rear tug driving structure of the wrist bending machine according to claim 1, 2 or 3, wherein a shaft sleeve (18) is sleeved on the driving shaft (7) and is circumferentially and fixedly connected with the driving shaft, a first one-way bearing (9) is sleeved on the shaft sleeve (18), an inner end of the driving crank (8) is sleeved on the first one-way bearing (9), an annular blocking edge (18a) is arranged on one side of the driving crank (8) on the outer peripheral surface of one end of the shaft sleeve (18), the other end of the shaft sleeve (18) is arranged on the other side of the driving crank (8) and is further sleeved with a blocking ring (19) and is axially and fixedly connected with the blocking ring and the blocking ring.

5. The rear tug driving structure of a wrist bending machine according to claim 4, wherein a left sleeve (21) and a right sleeve (22) are arranged in the machine shell (20), two ends of the driving shaft (7) are respectively inserted into the left sleeve (21) and the right sleeve (22), and one or more one-way bearings II (23) are further arranged between the driving shaft (7) and the left sleeve (21).

6. The rear tug driving structure of a wrist bending machine according to claim 1, wherein an oil supply hole communicated to an internal oil supply channel is formed in the outer peripheral surface of the upper shaft (1), and the oil supply hole faces the driving crank (8).

7. The rear tug driving structure of a wrist bending machine according to claim 1, 2 or 3, wherein the lower end of the mounting frame (3) is provided with a swing connecting rod (24) bent in an arc shape, and the inner end of the swing connecting rod (24) can swing downwards; the mop wheel assembly (4) comprises an upper mop wheel (4a) arranged at the upper end of the mounting rack (3), a middle mop wheel (4b) arranged at the lower end of the mounting rack (3) and a lower mop wheel (4c) arranged at the inner end of the swing connecting rod (24); the mop belt (5) is sleeved on the mop upper wheel (4a), the mop middle wheel (4b) and the mop lower wheel (4 c); one side of the mounting rack (3) is also connected with an auxiliary connecting rod (25), and the end part of the auxiliary connecting rod (25) is provided with a tension wheel (26) which abuts against the outer side of the mop belt (5).

8. The rear tug driving structure of a wrist bending machine according to claim 7, wherein the middle of the swing connecting rod (24) is hinged to the lower end of the mounting frame (3), a downward driving cylinder (27) is arranged on the mounting frame (3), and a piston rod (27a) of the driving cylinder (27) is hinged to the outer end of the swing connecting rod (24).

9. The rear tug driving structure of a wrist bending machine according to claim 8, wherein an axle (28) is provided in the middle of the upper wheel (4a) of the mop, a transmission shaft (29) is provided between the driving shaft (7) and the axle (28), one end of the transmission shaft (29) is connected with the end of the driving shaft (7) through a first universal joint (30), and the other end of the transmission shaft (29) is connected with the end of the axle (28) through a second universal joint (31).

Technical Field

The invention belongs to the technical field of sewing equipment, and relates to a bent wrist machine, in particular to a rear tug driving structure of the bent wrist machine.

Background

The wrist bending machine is a chain stitch machine formed by bending needles and hooking threads, the wrist bending machine with a rear tug in the current market is more and more accepted by users, the types of the rear tug are more and more, the wrist bending machine comprises a rear tug structure represented by brothers and heavy machines, the installation mode is split, and a driving source of the wrist bending machine is a motor or a clutch motor; the simple rear tug structure represented by Jack and Mersen is integrally mounted; the electronic rear tug structure represented by the Ku Kama is split in installation mode, and the three rear tug structures have advantages and disadvantages respectively.

Chinese patent (publication number: CN 203007624U; publication date: 2013-06-19) discloses a tug transmission device of a wrist bending machine, which comprises a shell, wherein two ends of the upper part of the shell are fixedly provided with bearing seats; the two bearing blocks are respectively and movably connected with the two ends of the direct drive shaft through bearings; one end of the direct drive shaft is fixedly provided with a tug synchronizing wheel; the tug synchronizing wheel is connected with the main shaft synchronizing wheel through a synchronous belt; the other end of the direct drive shaft is provided with an adjusting disc; the adjusting plate is provided with an adjusting block, the adjusting plate pressing plate is fixedly connected with the adjusting plate, and the adjusting block is connected with the adjusting plate pressing plate through an adjusting screw; the adjusting disc is axially connected with a bearing outer sleeve, and the bearing outer sleeve is connected with a bearing inner sleeve through a bearing to form a bearing assembly; the bottom of the bearing outer sleeve is connected with the top end of the ball head connecting rod through a nut; the bottom end of the ball head connecting rod is connected with the joint bearing through a nut; the joint bearing is connected with the tug through a shaft pin.

The tug transmission device of the wrist bending machine in the patent document has a complex structure and relatively high use cost; the rear tugboat structure, the material pricking structure and the material feeding structure are driven by different driving sources, and the synchronism is poor; and a lubricating device for the rear tug structure is not arranged, so that the rear tug structure is seriously abraded in the using process.

Disclosure of Invention

The invention provides a rear tug driving structure of a wrist bending machine according to the problems in the prior art, and the technical problems to be solved by the invention are as follows: how to simplify the constitution of back tow boat drive structure, reduce use cost to improve its and bent wrist machine other structures's synchronism.

The purpose of the invention can be realized by the following technical scheme:

a rear tug driving structure of a wrist bending machine comprises an upper shaft and a driving motor for driving the upper shaft to rotate, and is characterized in that the rear tug driving structure comprises an installation frame, a mop wheel assembly arranged on the installation frame, a mop belt sleeved on the mop wheel assembly and an eccentric connecting rod sleeved on the upper shaft, a driving shaft capable of rotating only in one direction is arranged on one side of the upper shaft, a driving crank is sleeved on the driving shaft and connected with the driving shaft through a one-way bearing I, and the outer end of the eccentric connecting rod is hinged with the outer end of the driving crank through a crank pin; one end of the driving shaft is connected with the mop wheel assembly and can drive the mop belt sleeved on the mop wheel assembly to run.

The working principle is as follows: in the working process of the structure, the driving motor drives the upper shaft to rotate for 360 degrees, the eccentric connecting rod sleeved on the upper shaft is connected with the driving crank sleeved on the driving shaft through the crank pin, and therefore the upper shaft drives the driving shaft to rotate; the driving shaft is connected with a mop wheel component arranged on the mounting frame, and the mop wheel belt is sleeved on the mop wheel component, so that the driving shaft drives the mop wheel component and the mop belt to move, the mop wheel belt acts on the cloth to drive the cloth to move, and the purpose of the mop is achieved. The rear tug driving structure is simple in composition and long in service life, and the use cost is reduced; this back tug drive structure and bent wrist machine body design, couple together upper shaft and drive shaft through eccentric connecting rod and drive crank, driving motor can drive upper shaft and drive shaft motion simultaneously, has consequently realized that back tug structure, thorn material mechanism and feeding mechanism are by same driving source drive in the bent wrist machine, have improved the synchronism of each structure of bent wrist machine, have reduced the use degree of difficulty, have improved work efficiency greatly.

In the rear tug driving structure of the wrist bending machine, a stop cam is eccentrically sleeved on the upper shaft, an adjusting cam is eccentrically sleeved at one end of the stop cam, the inner end of the eccentric connecting rod is sleeved on the outer peripheral surface of one end of the stop cam, and the inner end of the eccentric connecting rod and the outer peripheral surface are circumferentially and fixedly connected; the other end peripheral face of the stop cam is provided with a gear ring, the adjusting cam faces the side face of the gear ring, a mounting groove is formed in the side face of the gear ring, a stop plate is embedded in the mounting groove in a sliding mode, and one end of the stop plate is provided with a rack meshed with the gear ring. The adjustment cam, the stop cam and the stopper cooperate to adjust the amount of oscillation of the eccentric link, thereby adjusting the amount of oscillation of the drive shaft.

In the rear tug driving structure of the wrist bending machine, a first needle pitch positioning pin is arranged on the peripheral surface of the stop cam, a second needle pitch positioning pin is arranged on the side surface of the adjusting cam, and the first needle pitch positioning pin can abut against the second needle pitch positioning pin when the stop cam and the adjusting cam rotate relatively; the outer side of the stop plate is also provided with an adjusting pin which enables the gear ring and the rack to be kept meshed, a spring is sleeved on the adjusting pin, and the inner end of the adjusting pin is opposite to the stop plate. The first positioning pin and the second positioning pin are used for fixing the adjusting cam and the stopping cam, and the adjusting pin is used for adjusting the eccentric amount of the adjusting cam and the stopping cam, so that the swinging amount of the eccentric connecting rod is adjusted.

Alternatively, the adjustment pin may be mounted above the housing.

In the rear tug driving structure of the above-mentioned wrist bending machine, the sleeve is equipped with the axle sleeve on the driving shaft and both sides link firmly in the circumference, one-way bearing is established by one set on the axle sleeve, the cover is established in the inner of drive crank one on the one-way bearing, lie in on the one end outer peripheral face of axle sleeve one side of drive crank has the annular and keeps off the edge, the other end of axle sleeve is located the opposite side of drive crank still is equipped with retaining ring and both axial links firmly. The annular retaining edge and the retaining ring on the shaft sleeve are used for fixing the position of the driving crank, and the one-way bearing I is used for limiting the driving shaft to rotate only in one direction.

In the rear tug driving structure of the wrist bending machine, a left sleeve and a right sleeve are arranged in the shell, two ends of the driving shaft are respectively inserted into the left sleeve and the right sleeve, and one or more one-way bearings II are further arranged between the driving shaft and the left sleeve. The left sleeve and the right sleeve are used for fixing the position of the driving shaft, and the one-way bearing II is matched with the one-way bearing I to limit the driving shaft to rotate towards one direction only.

Specifically, the first one-way bearing and the second one-way bearing have the same rotation direction and can be both one-way ball bearings.

Alternatively, the first one-way bearing and the second one-way bearing can be designed by pressure angle self-locking instead.

In the rear tug driving structure of the wrist bending machine, an oil supply hole communicated to an oil supply channel inside the upper shaft is formed in the outer peripheral surface of the upper shaft, and the oil supply hole faces the driving crank. Oil is sprayed from the oil supply hole to lubricate the driving crank.

Alternatively, the lubrication of the parts may be changed to wet lubrication.

In the rear tug driving structure of the wrist bending machine, the lower end of the mounting frame is provided with an arc-shaped bent swinging connecting rod, and the inner end of the swinging connecting rod can swing downwards; the mop wheel assembly comprises an upper mop wheel arranged at the upper end of the mounting rack, a middle mop wheel arranged at the lower end of the mounting rack and a lower mop wheel arranged at the inner end of the swinging connecting rod; the mop belt is sleeved on the mop upper wheel, the mop middle wheel and the mop lower wheel; one side of the mounting rack is also connected with an auxiliary connecting rod, and the end part of the auxiliary connecting rod is provided with a tension wheel which is abutted against the outer side of the mop belt. The mop upper wheel drives the whole mop wheel assembly to move through a mop belt, and the auxiliary connecting rod acts on the tensioning wheel to adjust the tensioning force of the mop belt and facilitate the mop.

In the rear tug driving structure of the bent wrist machine, the middle of the swing connecting rod is hinged to the lower end of the mounting frame, a downward driving air cylinder is arranged on the mounting frame, and a piston rod of the driving air cylinder is hinged to the outer end of the swing connecting rod. The cylinder acts on the swing connecting rod, and the position of the lower mop wheel can be changed under the action of the swing connecting rod.

In the rear tug driving structure of the bent wrist machine, the middle part of the upper wheel of the mop is provided with a wheel shaft, a transmission shaft is arranged between the driving shaft and the wheel shaft, one end of the transmission shaft is connected with the end part of the driving shaft through a first universal joint, and the other end of the transmission shaft is connected with the end part of the wheel shaft through a second universal joint. The first universal joint and the second universal joint movably connect the driving shaft, the wheel shaft and the driving shaft, thereby conveniently transmitting the motion of the driving shaft to the mop wheel assembly

Compared with the prior art, the invention has the following advantages:

1. this back tow boat drive structure of bent wrist machine adopts back tow boat drive structure and bent wrist machine an organic whole to set up, simple structure, and use cost is lower relatively.

2. The rear tugboat structure, the material pricking structure and the material feeding structure of the wrist bending machine are driven by the same driving source, and synchronous operation is achieved.

3. The rear tug driving structure of the wrist bending machine realizes automatic lubrication of the rear tug driving structure by arranging the oil supply hole for oil injection;

4. this back tow boat drive structure of bent wrist machine makes things convenient for the operator to adjust the oscillating quantity of eccentric connecting rod through setting up the adjusting pin that faces the operator.

Drawings

Fig. 1 is a schematic view of the installation and use structure of the rear tug driving structure.

Fig. 2 is a schematic perspective view of the rear tug driving structure.

Fig. 3 is a schematic diagram I of a partial explosion structure of the rear tug driving structure.

Fig. 4 is a schematic diagram of a partial explosion structure of the rear tug driving structure.

Fig. 5 is a partial perspective view of the rear tug driving structure.

In the figure, 1, an upper shaft; 2. a drive motor; 3. a mounting frame; 4. a mop wheel assembly; 4a, a mop cloth upper wheel; 4b, a mop middle wheel; 4c, a mop lower wheel; 5. a mop belt; 6. an eccentric link; 7. a drive shaft; 8. a drive crank; 9. a one-way bearing I; 10. a crank pin; 11. a stop gear; 11a, a gear ring; 12. an adjustment cam; 12a, a mounting groove; 13. a stopper plate; 13a, a rack; 14. a first positioning pin; 15. a second positioning pin; 16. an adjustment pin; 17. a spring; 18. a shaft sleeve; 18a, an annular blocking edge; 19. a retainer ring; 20. a housing; 21. a left sleeve; 22. a right sleeve; 23. a one-way bearing II; 24. a swing link; 25. an auxiliary link; 26. a tension wheel; 27. a driving cylinder; 27a, a piston rod; 28. a wheel axle; 29. a drive shaft; 30. a first universal joint; 31. and a second universal joint.

Detailed Description

The following is a specific embodiment of the present invention and is further described with reference to the accompanying drawings, but the present invention is not limited to the following embodiment.

As shown in fig. 1, 2 and 5, the wrist bending machine comprises an upper shaft 1 and a driving motor 2 for driving the upper shaft 1 to rotate, the rear tug driving structure comprises a mounting frame 3, a cloth pulling wheel assembly 4 arranged on the mounting frame 3, a cloth pulling belt 5 sleeved on the cloth pulling wheel assembly 4 and an eccentric connecting rod 6 sleeved on the upper shaft 1, a driving shaft 7 capable of only rotating in one direction is arranged on one side of the upper shaft 1, a driving crank 8 is sleeved on the driving shaft 7, the driving crank 8 is connected with the driving shaft 7 through a one-way bearing I9, and the outer end of the eccentric connecting rod 6 is hinged with the outer end of the driving crank 8 through a crank pin 10; one end of the driving shaft 7 is connected with the mop wheel component 4 and can drive the mop belt 5 sleeved on the mop wheel component 4 to rotate. The outer peripheral surface of the upper shaft 1 is provided with an oil supply hole communicated to an oil supply channel inside, and the oil supply hole faces the driving crank 8. The outer peripheral surface of the upper shaft 1 is provided with an oil supply hole communicated to an oil supply channel inside, and the oil supply hole faces the driving crank 8. The lower end of the mounting rack 3 is provided with a swinging connecting rod 24 which is bent in an arc shape, and the inner end of the swinging connecting rod 24 can swing downwards; the mop wheel assembly 4 comprises an upper mop wheel 4a arranged at the upper end of the mounting frame 3, a middle mop wheel 4b arranged at the lower end of the mounting frame 3 and a lower mop wheel 4c arranged at the inner end of the swing connecting rod 24; the mop belt 5 is sleeved on the mop upper wheel 4a, the mop middle wheel 4b and the mop lower wheel 4 c; one side of the mounting frame 3 is also connected with an auxiliary connecting rod 25, and the end of the auxiliary connecting rod 25 is provided with a tension wheel 26 abutting against the outer side of the mop belt 5. The middle part of the swing connecting rod 24 is hinged with the lower end of the mounting frame 3, a downward driving cylinder 27 is arranged on the mounting frame 3, and a piston rod 27a of the driving cylinder 27 is hinged with the outer end of the swing connecting rod 24. The middle part of the mop upper wheel 4a is provided with a wheel axle 28, a transmission shaft 29 is arranged between the driving shaft 7 and the wheel axle 28, one end of the transmission shaft 29 is connected with the end part of the driving shaft 7 through a first universal joint 30, and the other end of the transmission shaft 29 is connected with the end part of the wheel axle 28 through a second universal joint 31.

Specifically, the driving motor 2 rotates to drive the upper shaft 1 to rotate, the crank pin 10 connects the eccentric connecting rod 6 on the upper shaft 1 with the driving crank 8 on the driving shaft 7, the upper shaft 1 drives the driving shaft 7 to rotate, the first universal joint 30 and the second universal joint 31 connect the driving shaft 7, the driving shaft 29 and the wheel shaft 28 inserted in the mop upper wheel 4a, the driving shaft 7 drives the mop upper wheel 4a to rotate, the mop upper wheel 4a drives the mop belt 5 to rotate, and the mop belt 5 drives the mop middle wheel 4b and the mop lower wheel 4c connected with the mop upper wheel to rotate. The auxiliary connecting rod 25 is pulled, and a tension wheel 26 connected with the auxiliary connecting rod acts on the mop belt 5 to change the tension force of the mop belt 5. The air cylinder 27 is driven, a piston rod 27a on the air cylinder acts on the swinging connecting rod 24, and the swinging connecting rod 24 changes the position of the lower mop wheel 4c, so that the mop of the mop wheel assembly 4 is convenient. The oil supply hole on the upper shaft 1 sprays oil to parts such as the driving crank 8 and the like for lubricating the parts. The rear tug driving structure and the bent wrist machine are integrally arranged, so that the composition of the rear tug driving structure is simplified, the use cost is greatly reduced, the lubrication is carried out while the work is carried out, and the work efficiency is improved.

As shown in fig. 3 and 4, the upper shaft 1 is eccentrically sleeved with a stop cam 11, one end of the stop cam 11 is eccentrically sleeved with an adjusting cam 12, and the inner end of the eccentric connecting rod 6 is sleeved on the outer peripheral surface of one end of the stop cam 11 and is circumferentially and fixedly connected with the outer peripheral surface of the one end of the stop cam 11; the outer peripheral surface of the other end of the stop cam 11 is provided with a gear ring 11a, the side surface of the adjusting cam 12 facing the gear ring 11a is provided with a mounting groove 12a, a stop plate 13 is embedded in the mounting groove 12a in a sliding manner, and one end of the stop plate 13 is provided with a rack 13a meshed with the gear ring 11 a. The circumferential surface of the stop cam 11 is provided with a first needle pitch positioning pin 14, the side surface of the adjusting cam 12 is provided with a second needle pitch positioning pin 15, and the first needle pitch positioning pin 14 can abut against the second needle pitch positioning pin 15 when the stop cam 11 and the adjusting cam 12 rotate relatively; the outer side of the stop plate 13 is also provided with an adjusting pin 16 which keeps the gear ring 11a meshed with the rack 13a, the adjusting pin 16 is sleeved with a spring 17, and the inner end of the adjusting pin 16 is opposite to the stop plate 13. The driving shaft 7 is sleeved with a shaft sleeve 18 and the one-way bearing I9 are circumferentially and fixedly connected, the shaft sleeve 18 is sleeved with the one-way bearing I9, the inner end of the driving crank 8 is sleeved with the one-way bearing I9, an annular blocking edge 18a is arranged on one side, located on the driving crank 8, of the outer peripheral surface of one end of the shaft sleeve 18, the other side, located on the driving crank 8, of the other end of the shaft sleeve 18 is further sleeved with. A left sleeve 21 and a right sleeve 22 are arranged in a shell 20 of the wrist bending machine, two ends of a driving shaft 7 are respectively inserted into the left sleeve 21 and the right sleeve 22, and one or more one-way bearings two 23 are further arranged between the driving shaft 7 and the left sleeve 21.

Specifically, the stop gear 11 is fixedly connected to the upper shaft 1 through a first adjusting cam positioning pin 14, the adjusting cam 12 can rotate relative to the upper shaft 1, the stop plate 13 is sleeved in a mounting groove 12a on the adjusting cam 12, and a rack 13a on the stop plate 13 is meshed with the gear ring 11 on the stop gear 11. During adjustment, the adjusting pin 16 is pressed, the rack 13a on the stop plate 13 is not meshed with the gear ring 11 on the stop gear 11, after the upper shaft 1 is rotated, the eccentric amount of the stop gear 11 and the adjusting cam 12 is changed, namely the eccentric amount between the adjusting cam 12 and the upper shaft 1 is changed, the swinging amount of the eccentric connecting rod 6 is adjusted, the rotating amount of the driving shaft 7 is adjusted, the driving crank 8 is fixed on the driving shaft 7 through the annular retaining edge 18a and the retaining ring 19 on the shaft sleeve 18, and the one-way bearing I9 and the one-way bearing II 23 sleeved on the driving shaft 7 limit the driving shaft 7 to rotate towards only one direction. The synchronous operation of all the structures of the wrist bending machine is realized, and the user can conveniently adjust the swinging amount of the eccentric connecting rod 6.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Although the 1, upper axis is used more herein; 2. a drive motor; 3. a mounting frame; 4. a mop wheel assembly; 4a, a mop cloth upper wheel; 4b, a mop middle wheel; 4c, a mop lower wheel; 5. a mop belt; 6. an eccentric link; 7. a drive shaft; 8. a drive crank; 9. a one-way bearing I; 10. a crank pin; 11. a stop gear; 11a, a gear ring; 12. an adjustment cam; 12a, a mounting groove; 13. a stopper plate; 13a, a rack; 14. a first positioning pin; 15. a second positioning pin; 16. an adjustment pin; 17. a spring; 18. a shaft sleeve; 18a, an annular blocking edge; 19. a retainer ring; 20. a housing; 21. a left sleeve; 22. a right sleeve; 23. a one-way bearing II; 24. a swing link; 25. an auxiliary link; 26. a tension wheel; 27. a driving cylinder; 27a, a piston rod; 28. a wheel axle; 29. a drive shaft; 30. a first universal joint; 31. universal joints, etc., but does not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any one of the additional limitations that fall within the spirit of the present invention.