Three-eye connecting rod and transmission mechanism

Abstract

The invention relates to the field of transmission mechanisms of embroidery machines, and discloses a three-eye connecting rod and a transmission mechanism, the three-eye connecting rod comprises a rod body (10), the rod body (10) is provided with a first hole (1), a second hole (2) and a third hole (3), the second hole (2) is located between the first hole (1) and the third hole (3), and the second hole (2) is provided with a first shaft (6) or provided with a first locking groove (4) for locking the first shaft (6); or / and the hole III (3) is provided with a shaft II (7) or is provided with a locking groove II (5) for locking the shaft II (7); the transmission mechanism part adopts the mode that an integrated bearing structure is matched with a clamping structure for transmission, and the whole device has the advantages of being stable and reliable in transmission, free of clamping stagnation, long in service life, low in noise and the like.

Description

Technical Field

[0001] The invention relates to the field of embroidery machine transmission mechanisms, in particular to a three-eye connecting rod and a transmission mechanism. Background Art

[0002] In the prior art, the needle bar cam and the thread take-up rod driving cam mechanism in the embroidery machine head are set as eccentric cams. For example, the applicant's prior Chinese patent application CN201410109821.9 discloses a computer embroidery machine needle bar cam mechanism with a balancing device. The cam structure is connected to the three-eye connecting rod through an axis, and the three-eye connecting rod drives the driver to reciprocate at high speed through a small connecting rod, commonly known as a four-piece assembly. For example, Chinese patent 202321860069.2 discloses the above technical solution, but this technical solution has the following disadvantages: due to the swinging motion, it is necessary that one section of the connecting shaft can be relatively rotated to fix the other end. The existing solution designs the shaft and the bearing as one body and then sets it on the three-eye connecting rod, which has the following disadvantages, and the assembly cumulative error between the cam connecting rod, the three-eye connecting rod, the small connecting rod and the driver is large, and the fixing structure adopts screw top labor or other fixing structures, which has the disadvantages of difficulty in installation. Summary of the invention

[0003] The present invention aims at the shortcomings of the prior art and provides a three-eye connecting rod and a transmission mechanism.

[0004] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0005] A three-eye connecting rod and a transmission mechanism include a rod body, on which are arranged holes one, two and three, wherein hole three is used to be located between hole one and hole three with hole two, and hole two is provided with shaft one or locking groove one for locking shaft one; or / and hole three is provided with shaft two or locking groove two for locking shaft two.

[0006] Preferably, the locking groove 1 and the hole 2 form a notch structure, the locking groove 1 is connected to the hole 2, and the deformation of the locking groove 1 under force can drive the inner diameter of the hole 2 to change.

[0007] Preferably, the locking groove 1 is provided on the side wall of the rod body and communicates with the hole 2, and the locking groove 1 passes through the end surfaces at both ends of the hole 2.

[0008] Preferably, the rod body includes a fixing boss 1, a locking groove 1 is provided on the side of the fixing boss 1, a fixing hole 1 is provided on the fixing boss 1, and the fixing hole 1 passes through the locking groove 1.

[0009] Preferably, the fixing hole 1 passes through the upper end surface and the lower end surface of the fixing boss 1.

[0010] Preferably, the annular surface on the outer side of shaft one is provided with groove one, the inner wall of hole two is provided with groove two, and rollers and a retaining frame are provided between groove one and groove two.

[0011] Preferably, the locking groove 2 and the hole 3 form a notch structure, the locking groove 2 is connected to the hole 3, and the deformation of the locking groove 2 can drive the inner diameter of the hole 3 to change.

[0012] Preferably, the rod body includes a second fixing boss, a second locking groove is provided on a side surface of the second fixing boss, a second fixing hole is provided on the second fixing boss, and the second fixing hole passes through the second locking groove.

[0013] Preferably, the second fixing hole passes through the upper end surface and the lower end surface of the second fixing boss.

[0014] Preferably, the outer annular surface of shaft two is provided with groove three, the inner wall of hole three is provided with groove four, and rollers and a retaining frame are provided between groove three and groove four.

[0015] The present invention also includes a transmission mechanism, which includes a three-eye connecting rod, a cam connecting rod and a small connecting rod, the cam connecting rod and the three-eye connecting rod are connected through shaft one, the three-eye connecting rod and the small connecting rod are connected through shaft two, the three-eye connecting rod or / and the three-eye three-connecting rod can rotate relative to shaft one, and the three-eye connecting rod or / and the small connecting rod can rotate relative to shaft two;

[0016] One end of shaft one is used as the inner ring of the bearing, and groove one is provided on the outer circumferential side surface thereof; the inner wall of the hole corresponding to the shaft one is used as the outer ring of the bearing, and groove two is provided on the inner wall thereof; groove one and groove two form the roller channel of the bearing; one end of shaft one forms an integrated bearing structure through groove one, groove two and the rollers in the roller channel; the other end of shaft one is clamped with the cam connecting rod or the three-eye connecting rod through a clamping structure;

[0017] One end of shaft two is used as the inner ring of the bearing, and groove three is opened on its outer circumferential side surface; the inner wall of the hole installed corresponding to it is used as the outer ring of the bearing, and groove four is opened on its inner wall; groove three and groove four form the roller channel of the bearing; one end of shaft two forms an integrated bearing structure through groove three, groove four and the roller in the roller channel; the other end of shaft two is clamped with a three-eye connecting rod or a small connecting rod through a clamping structure.

[0018] Preferably, the three-eye connecting rod comprises hole one, hole two and hole three, hole two is connected to shaft one, hole three is connected to shaft two, the small connecting rod comprises hole four connected to shaft two, and the cam connecting rod comprises hole five connected to shaft one;

[0019] The clamping structure includes a locking mouth for clamping axis one or axis two, the locking mouth for clamping axis one is opened at the edge of hole two or hole five, and the locking mouth for clamping axis two is opened at the edge of hole three or hole four; the locking mouth extends to the outside to form an opening structure, and the clamping structure also includes a locking piece and a fixing hole arranged on the rod body, the fixing hole crosses the locking mouth, the locking piece is installed in the fixing hole and connects the upper and lower parts of the locking mouth and applies a force, the deformation of the locking mouth drives the change of the aperture of the hole connected to the locking mouth, thereby realizing clamping or unclamping of the hole.

[0020] Preferably, it also includes a fixing boss integrally formed with the cam connecting rod 21 or the small connecting rod or the three-eye connecting rod, and the locking opening and the fixing hole are provided on the fixing boss.

[0021] Preferably, one end of shaft one is connected to hole two to form an integrated bearing structure with hole two, and the other end of shaft one is installed in hole five and fixedly connected to the cam connecting rod through a clamping structure provided at hole five; one end of shaft two is connected to hole three to form an integrated bearing structure with hole three, and the other end of shaft two is installed in hole four and fixedly connected to the small connecting rod through a clamping mechanism provided at hole four.

[0022] Preferably, a driver is also included, and a hole six is ​​provided on the small connecting rod, and shaft three is installed in hole six. Shaft three and hole six form an integrated bearing structure, and the other end of shaft three is fixedly connected to the driver.

[0023] As a preferred embodiment, a bearing structure is integrated in hole 1, and a groove for placing bearing rollers is provided on the inner wall of hole 1. The inner wall of hole 1 is used as the outer ring of the bearing, and the groove on the inner wall of hole 1 is a double groove; the integrated bearing structure is a double groove roller bearing structure

[0024] Compared with the prior art, this solution has the following advantages: an integrated transmission mechanism is realized through the overall design of a three-eye connecting rod, a small connecting rod and a cam connecting rod, and the assembly between them is simple and has high precision. It can adapt to high-speed transmission, has a low failure rate, a long service life, and low noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the three-eye connecting rod.

[0026] Figure 2 It is a schematic diagram of the structure of the three-eye connecting rod.

[0027] Figure 3 It is a structural diagram of a three-eye connecting rod.

[0028] Figure 4 It is a structural diagram of a three-eye connecting rod.

[0029] Figure 5 yes Figure 1 Schematic diagram of the internal structure.

[0030] Figure 6 yes Figure 1 Schematic diagram of the rod structure.

[0031] Figure 7 Figure 1 Schematic diagram of the structure of central axis one.

[0032] Figure 8 Figure 1 Schematic diagram of the structure of central axis one.

[0033] Fig. 9 It is a schematic diagram of the transmission mechanism.

[0034] Fig.10 It is a schematic diagram of the transmission mechanism.

[0035] Fig.11 yes Figure 8 , Fig. 9 Schematic diagram of the structure of the three-eye connecting rod.

[0036] Fig.12 yes Figure 8 , Fig. 9 Schematic diagram of the structure of small and medium connecting rods.

[0037] Fig.13 It is a schematic diagram of the structure of the small connecting rod of Example 11.

[0038] The technical names of the accompanying drawings are: 1-hole one, 2-hole two, 3-hole three, 4-locking groove one, 5-locking groove two, 6-shaft one, 7-shaft two, 8-fixing boss one, 9-fixing boss two, 10-rod body, 11-fixing hole one, 12-fixing hole two, 13-roller, 14-retaining frame, 15-groove one, 16-groove two, 17-groove three, 18-groove four, 20-three-eye connecting rod, 21-cam connecting rod, 22-small connecting rod, 23-integrated bearing structure, 24-clamping structure, 25-locking mouth, 26-hole four, 27-hole five, 28-hole six, 29-locking piece, 31-shaft three, 32-fixing hole, 34-driver. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0040] Example 1

[0041] A three-eye connecting rod and a transmission mechanism include a rod body 10, on which a hole 1, a hole 2 and a hole 3 are provided, wherein the hole 3 3 is used to be located between the hole 1 1 and the hole 3 together with the hole 2, and the hole 2 2 is provided with a shaft 1 6 or a locking groove 1 4 for locking the shaft 1 6; or / and the hole 3 3 is provided with a shaft 2 7 or a locking groove 2 5 for locking the shaft 2 7, wherein the axes of the hole 1 1, the hole 2 2 and the hole 3 3 are parallel to each other. The hole 1 is located at the lower end and is used to connect with the body of the high-speed machine head. The rod body 10 can swing around the hole 1, and the hole 2 in the middle is connected to the cam mechanism. The specific connection method of the hole 2 and the cam structure is through the shaft 1 6. This scheme provides two ways to connect the shaft 1 and the hole 2. One is a split type, the shaft 1 is inserted into the hole 2 and then the hole 2 and the shaft 1 are locked and fixed through the locking groove; the other way is that the shaft 1 and the hole 2 are first axially fixed, and the shaft 1 is installed in the hole 2, and is specifically connected through the bearing structure; similarly, the connection method of the shaft 2 7 and the hole 3 is the same as the connection method of the shaft 1 6 and the hole 2. The following will be described separately according to different forms.

[0042] In this embodiment, the shaft 1 6 and the rod body 10 are two independent parts; the hole 2 is provided with a locking groove structure to fix the shaft 1 6. Specifically, the locking groove 1 4 and the hole 2 form a notch structure, the locking groove 1 4 is connected with the hole 2, and the deformation of the locking groove 1 4 under force can drive the inner diameter of the hole 2 2 to change; that is, the locking groove is led outward from the inner wall of the hole 2, and when the upper and lower parts of the locking groove are locked under force, the rod body 10 of the upper and lower parts of the locking groove will deform toward the middle of the locking groove, thereby driving the inner diameter of the hole 2 2 to shrink, and realizing the clamping function of the shaft 1 6 in the hole 2.

[0043] Specifically, the locking groove 1 4 is provided on the side wall of the rod body 10 and communicated with the hole 2 2 . The locking groove 1 4 passes through the end faces at both ends of the hole 2 . The end faces at both ends are the planes where the openings at the axial ends of the hole 2 2 are located.

[0044] In order to facilitate the fixing operation, the rod body 10 includes a fixing boss 8, a locking groove 4 is provided on the side of the fixing boss 8, and a fixing hole 11 is provided on the fixing boss 8, and the fixing hole 11 penetrates the locking groove 4. The fixing boss 8 is located on one side of the hole 2, and the fixing hole 11 is used to install a locking screw or a bolt. The locking screw or the locking bolt can pull the fixing boss 8 parts on both sides of the locking groove 4 closer, thereby reducing the locking groove 4 and then reducing the inner diameter of the hole 2 to achieve the clamping of the shaft 6 installed in the hole 2. The fixing hole 11 can be a threaded hole or a light hole. The fixing hole 11 is located on both sides of the locking hole 1, and the fixing hole 11 part on one side must be a through hole, and the fixing hole 11 part on the other side is a blind hole or a through hole. When the part is a blind hole, the fixing hole 11 is selected as a threaded hole, and at least the blind hole part is a threaded hole, so that the screw can be inserted from the through hole part to the blind hole part for fixing.

[0045] Example 2

[0046] The difference between this embodiment and embodiment 1 is that a fixing hole 11 penetrates and is fixed on the upper end surface and the lower end surface of the boss 1, that is, the fixing hole 11 is a through hole structure penetrating a part of the boss on both sides of the locking groove 14, and the fixing hole 11 is a threaded hole or a smooth hole.

[0047] Example 3

[0048] The difference between this embodiment and the first embodiment is that the structure of the locking groove 4 is replaced by the integrated structure of the shaft 1 6 and the second hole 2; the annular surface outside the shaft 1 6 is provided with a groove 15, the inner wall of the second hole 2 is provided with a groove 2 16, and the roller 13 and the retainer 14 are provided between the groove 15 and the groove 2 16. The groove 15 and the groove 2 16 form a complete raceway of the bearing roller 13, and cooperate with the roller 13, the retainer 14 and other parts required for the bearing to form a complete bearing structure.

[0049] Example 4

[0050] This embodiment further defines the bearing structure on the basis of the embodiment 3. The groove 1 15 and the groove 2 16 are both double groove structures. The bearing structure formed by the shaft 1 6 and the hole 2 2 and its inner wall is a double groove ball bearing structure.

[0051] Example 5

[0052] This embodiment further defines the structure of hole 3, which can be matched with the structure of hole 2 2 in any of the above embodiments; wherein the locking groove 2 5 and hole 3 3 form a notch structure, the locking groove 2 5 is connected with hole 3 3, and the deformation of the locking groove 2 5 can drive the change of the inner diameter of hole 3 3. The structural connection relationship between hole 2 2 and locking groove 1 4 is consistent with the function.

[0053] The locking groove 25 is opened on the side wall of the rod body 10 and is connected with the hole 3. The locking groove passes through the end faces of both ends of the hole 3. The rod body 10 includes a fixing boss 29. The locking groove 25 is opened on the side of the fixing boss 29. The fixing boss 29 is provided with a fixing hole 22. The fixing hole 22 passes through the locking groove 25.

[0054] Example 6

[0055] The second fixing hole 12 is further defined on the basis of the fifth embodiment. The second fixing hole 12 passes through the upper end surface and the lower end surface of the second fixing boss 9. The structure design of the second fixing hole 12 is similar to that of the first locking groove 4 and the second hole 2, and the first fixing hole 11.

[0056] Example 7

[0057] This embodiment further defines the structure of hole three 3, which can be matched with the structure of hole two 2 in any of embodiments 1-4; the outer annular surface of shaft two 7 is provided with groove three 17, the inner wall of hole three 3 is provided with groove four 18, and rollers 13 and retainers 14 are provided between groove three 17 and groove four 18. That is, this embodiment discloses a method of integrally connecting shaft two 7 and hole three 3 by designing a bearing structure, and this structure is the same as the connection method of shaft one 6 and hole two 2 in embodiments 3 and 4.

[0058] Example 8

[0059] A double-groove ball bearing is integrated in hole 1, and the outer ring raceway of the double-groove ball bearing is a groove opened on the inner wall of hole 1. This structure is applicable to the three-eye connecting rod structure of all the above embodiments.

[0060] Example 9

[0061] This scheme also includes a transmission mechanism, which includes a three-eye connecting rod 20, a cam connecting rod 21 and a small connecting rod 22. The cam connecting rod 21 is connected to the three-eye connecting rod 20 through the shaft 1 6, and the three-eye connecting rod 20 is connected to the small connecting rod 22 through the shaft 2 7. The three-eye connecting rod 20 or / and the three-eye three-link rod can rotate relative to the shaft 1 6, and the three-eye connecting rod 20 or / and the small connecting rod 22 can rotate relative to the shaft 2 7; wherein the structural design of the three-eye connecting rod 20 can select any one of the above embodiments, but correspondingly, the other ends of the shaft 1 6 and the shaft 2 7 should be modified accordingly. The overall design idea of ​​the transmission mechanism is as follows:

[0062] One end of the shaft 16 is used as the inner ring of the bearing and a groove 15 is provided on its outer circumferential side surface, and the inner wall of the hole corresponding to the shaft 16 is used as the outer ring of the bearing and a groove 2 is provided on its inner wall. The groove 15 and the groove 2 16 form a roller channel of the bearing. One end of the shaft 16 forms an integrated bearing structure 23 through the groove 15, the groove 2 16 and the rollers in the roller channel; the other end of the shaft 16 is clamped with the cam connecting rod 21 or the three-eye connecting rod 20 through the clamping structure 24;

[0063] One end of shaft 2 7 is used as the inner ring of the bearing, and groove 3 17 is opened on its outer circumferential side surface; the inner wall of the hole installed corresponding to it is used as the outer ring of the bearing, and groove 4 18 is opened on its inner wall. Groove 3 17 and groove 4 18 form the roller channel of the bearing. One end of shaft 2 7 forms an integrated bearing structure 23 through groove 3 17, groove 4 18 and the rollers in the roller channel; the other end of shaft 2 7 is clamped with the three-eye connecting rod 20 or the small connecting rod 22 through the clamping structure 24.

[0064] That is, in this solution, the shaft is always integrated on the connecting rod, which is different from the solution of the prior art in which the shaft and bearing are designed as one body, the shaft and bearing are installed in combination and then installed in the corresponding hole. In this solution, one end of shaft 1 6 and shaft 2 7 always forms an integrated structure with the bearing and the connecting rod, that is, the shaft is the inner ring of the bearing, and the connecting rod is the outer ring of the bearing, and then cooperates with other necessary components to form the bearing to form a whole, saving the accumulated errors caused by the traditional assembly of shaft and bearing, and assembly of bearing and hole. This design can save a lot of assembly time, and has higher precision and longer service life.

[0065] The three-eye connecting rod 20 includes a hole 1, a hole 2 and a hole 3, the hole 2 is connected to the shaft 6, the hole 3 is connected to the shaft 7, the small connecting rod 22 includes a hole 4 26 connected to the shaft 7, and the cam connecting rod 21 includes a hole 5 27 connected to the shaft 6;

[0066] The clamping structure 24 includes a locking mouth 25 for clamping shaft one 6 or shaft two 7. The locking mouth 25 for clamping shaft one 6 is opened at the edge of hole two 2 or hole five 27, and the locking mouth 25 for clamping shaft two 7 is opened at the edge of hole three 3 or hole four 26; the locking mouth 25 extends to the outside to form an opening structure. The clamping structure 24 also includes a locking piece 29 and a fixing hole 32 arranged on the rod body. The fixing hole 32 crosses the locking mouth 25. The locking piece 29 is installed in the fixing hole 32 and connects the upper and lower parts of the locking mouth 25 and applies a force. The deformation of the locking mouth 25 drives the change of the aperture of the hole connected to the locking mouth 25, thereby realizing the clamping or unclamping of the hole.

[0067] Its clamping structure 24 has the same structural design as the locking groove and the fixing hole 32 in the above-mentioned embodiment. The locking mouth 25 is the above-mentioned locking groove, and its number and position are designed according to the position of the integrated bearing structure 23 of shaft one 6 and shaft two 7, so as to always ensure that one end of shaft one 6 and shaft two 7 is the integrated bearing structure 23 formed with the connecting rod, and the other end is clamped and fixed with the other connecting rod through the clamping structure 24.

[0068] Specifically, it also includes a fixed boss integrally formed with the cam connecting rod 21 or the small connecting rod 22 or the three-eye connecting rod 20, and the locking opening 25 and the fixing hole 32 are provided on the fixed boss. This is the same as the design concept of the fixed boss of the three-eye connecting rod 20 in the above embodiment.

[0069] In this embodiment, shaft one 6 is connected to one end of hole two 2 to form an integrated bearing structure 23 with hole two 2, and the other end of shaft one 6 is installed in hole five 27 and fixedly connected to the cam connecting rod 21 through the clamping structure 24 provided at hole five 27; shaft two 7 is connected to one end of hole three 3 to form an integrated bearing structure 23 with hole three 3, and the other end of shaft two 7 is installed in hole four 26 and fixedly connected to the small connecting rod 22 through the clamping mechanism provided at hole four 26.

[0070] The drive 34 is also included, and the small connecting rod 22 is also provided with a hole 6 28, in which the shaft 31 is installed, and the shaft 31 and the hole 6 28 form an integrated bearing structure 23, and the other end of the shaft 31 is fixedly connected to the drive 34. The integrated bearing structure 23 formed by the shaft 1 6, the shaft 2 7 and the shaft 3 31 is a double groove ball bearing structure.

[0071] A bearing structure is integrated in hole 1, and a groove for placing bearing rollers is provided on the inner wall of hole 1. The inner wall of hole 1 is used as the outer ring of the bearing. The groove on the inner wall of hole 1 is a double groove, and the bearing structure in hole 1 is also a double groove ball bearing structure.

[0072] Example 10

[0073] The difference from Example 9 is that shaft three 31 is a stepped shaft, the end portion of shaft three 31 is shaft segment one 101, the portion close to the main body of the small connecting rod 22 is shaft segment two 102, and shaft segment one 101 is provided with an external thread.

[0074] During assembly, shaft three 31 is inserted into the driver and assembled with the driver, and also includes a locking nut. The locking nut is threadedly connected with shaft section one 101 to connect the small connecting rod to the driver.

Claims

1. A three-eye connecting rod and transmission mechanism, comprising a rod body (10), wherein the rod body (10) is provided with a first hole (1), a second hole (2) and a third hole (3), wherein the second hole (2) is located between the first hole (1) and the third hole (3), and wherein: The second hole (2) is provided with a shaft (6) or a locking groove (4) for locking the first shaft (6); or / and the third hole (3) is provided with a shaft (7) or a locking groove (5) for locking the second shaft (7).

2. The three-eye connecting rod and transmission mechanism according to claim 1, characterized in that: The locking groove 1 (4) and the hole 2 (2) form a notch structure, the locking groove 1 (4) is connected to the hole 2 (2), and the locking groove 1 (4) is deformed by force to drive the inner diameter of the hole 2 (2) to change; the locking groove 1 (4) is arranged on the side wall of the rod body (10) and is connected to the hole 2 (2), and the locking groove 1 (4) passes through the end faces of both ends of the hole 2 (2).

3. The three-eye connecting rod and transmission mechanism according to claim 2, characterized in that: The rod body (10) comprises a fixing boss (8), a locking groove (4) is provided on the side of the fixing boss (8), a fixing hole (11) is provided on the fixing boss (8), and the fixing hole (11) passes through the locking groove (4).

4. The three-eye connecting rod and transmission mechanism according to claim 4, characterized in that: The fixing hole 1 (11) passes through the upper end surface and the lower end surface of the fixing boss 1 (8).

5. The three-eye connecting rod and transmission mechanism according to claim 1, characterized in that: The annular surface outside the shaft one (6) is provided with a groove one (15), the inner wall of the hole two (2) is provided with a groove two (16), and a roller (13) and a retaining frame (14) are provided between the groove one (15) and the groove two (16).

6. The three-eye connecting rod and transmission mechanism according to claim 1, 2, 3, 4 or 5, characterized in that: The locking groove 2 (5) and the hole 3 (3) form a notch structure, the locking groove 2 (5) is connected with the hole 3 (3), and the deformation of the locking groove 2 (5) can drive the inner diameter of the hole 3 (3) to change.

7. The three-eye connecting rod and transmission mechanism according to claim 6, characterized in that: The rod body (10) comprises a second fixing boss (9), a second locking groove (5) is arranged on the side surface of the second fixing boss (9), a second fixing hole (12) is arranged on the second fixing boss (9), and the second fixing hole (12) passes through the second locking groove (5).

8. The three-eye connecting rod and transmission mechanism according to claim 1, 2, 3, 4 or 5, characterized in that: The outer annular surface of shaft two (7) is provided with groove three (17), the inner wall of hole three (3) is provided with groove four (18), and a roller (13) and a retaining frame (14) are provided between groove three (17) and groove four (18).

9. The three-eye connecting rod and transmission mechanism according to claim 1, characterized in that: A double groove ball bearing is integrated in the hole one (1), and the outer ring raceway of the double groove ball bearing is a groove opened on the inner wall of the hole one (1).

10. Transmission mechanism, characterized in that: The invention comprises a three-eye connecting rod (20), a cam connecting rod (21) and a small connecting rod (22); the cam connecting rod (21) and the three-eye connecting rod (20) are connected via a first shaft (6); the three-eye connecting rod (20) and the small connecting rod (22) are connected via a second shaft (7); the three-eye connecting rod (20) and / or the three-eye three-connecting rod and the first shaft (6) can rotate relative to each other; the three-eye connecting rod (20) and / or the small connecting rod (22) and the second shaft (7) can rotate relative to each other; One end of the shaft (6) is used as the inner ring of the bearing, and a groove (15) is provided on its outer circumferential side surface; the inner wall of the hole corresponding to the shaft (6) is used as the outer ring of the bearing, and a groove (16) is provided on its inner wall; the groove (15) and the groove (16) form a roller channel of the bearing; one end of the shaft (6) forms an integrated bearing structure (23) through the groove (15), the groove (16) and the rollers in the roller channel; the other end of the shaft (6) is clamped with the cam connecting rod (21) or the three-eye connecting rod (20) through the clamping structure (24); One end of the second shaft (7) is used as the inner ring of the bearing, and a groove three (17) is provided on its outer circumferential side surface; the inner wall of the hole installed corresponding to it is used as the outer ring of the bearing, and a groove four (18) is provided on its inner wall; the groove three (17) and the groove four (18) form a roller channel of the bearing; one end of the second shaft (7) forms an integrated bearing structure (23) through the groove three (17), the groove four (18) and the rollers in the roller channel; the other end of the second shaft (7) is clamped with the three-eye connecting rod (20) or the small connecting rod (22) through the clamping structure (24).

11. The transmission mechanism according to claim 10, characterized in that: The three-eye connecting rod (20) comprises a hole 1 (1), a hole 2 (2) and a hole 3 (3), the hole 2 (2) is connected to the shaft 1 (6), the hole 3 (3) is connected to the shaft 2 (7), the small connecting rod (22) comprises a hole 4 (26) connected to the shaft 2 (7), and the cam connecting rod (21) comprises a hole 5 (27) connected to the shaft 1 (6); The clamping structure (24) comprises a locking opening (25) for clamping shaft one (6) or shaft two (7); the locking opening (25) for clamping shaft one (6) is arranged at the edge of hole two (2) or hole five (27); the locking opening (25) for clamping shaft two (7) is arranged at the edge of hole three (3) or hole four (26); the locking opening (25) extends to the outside to form an open structure; the clamping structure (24) further comprises a locking member (29) and a fixing hole (32) arranged on the rod body; the fixing hole (32) crosses the locking opening (25); the locking member (29) is installed in the fixing hole (32) and connects the upper and lower parts of the locking opening (25) and applies a force; the deformation of the locking opening (25) drives the diameter of the hole connected to the locking opening (25) to change, thereby achieving clamping or unclamping of the hole.

12. The transmission mechanism according to claim 11, characterized in that: It also includes a fixing boss integrally formed with the cam connecting rod 21 or the small connecting rod (22) or the three-eye connecting rod (20), and the locking opening (25) and the fixing hole (32) are arranged on the fixing boss.

13. The transmission mechanism according to claim 11, characterized in that: One end of the shaft (6) is connected to the second hole (2) to form an integrated bearing structure (23) with the second hole (2), and the other end of the shaft (6) is installed in the fifth hole (27) and is fixedly connected to the cam connecting rod (21) through a clamping structure (24) provided at the fifth hole (27); one end of the shaft (7) is connected to the third hole (3) to form an integrated bearing structure (23) with the third hole (3), and the other end of the shaft (7) is installed in the fourth hole (26) and is fixedly connected to the small connecting rod (22) through a clamping mechanism provided at the fourth hole (26).

14. The transmission mechanism according to claim 10, characterized in that: The small connecting rod (22) also includes a sixth hole (28), a third shaft (31) is installed in the sixth hole (28), the third shaft (31) and the sixth hole (28) form an integrated bearing structure (23), and the other end of the third shaft (31) is fixedly connected to the driver (34).

15. The transmission mechanism according to claim 14, characterized in that: The shaft three (31) is a stepped shaft, the end portion of the shaft three (31) is the shaft segment one (101), the portion close to the main body of the small connecting rod (22) is the shaft segment two (102), and the shaft segment one (101) is provided with an external thread.

16. The transmission mechanism according to claim 10, characterized in that: A bearing structure is integrated in the hole one (1); the inner wall of the hole one (1) is provided with a groove for accommodating the bearing roller; the inner wall of the hole one (1) is used as the outer ring of the bearing; the groove on the inner wall of the hole one (1) is a double groove; the integrated bearing structure (23) is a double groove roller bearing structure.

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