Servo spin riveting machine

Abstract

The embodiment of the utility model discloses a servo spin riveting machine which comprises a cylinder barrel, a first driving device installed at the rear end of the cylinder barrel, a first bearing seat installed at the rear end of the cylinder barrel, a first bearing installed at the first bearing seat, a lead screw installed at the first bearing, one end of the lead screw connected with the first driving device, a lead screw nut installed on the outer side of the lead screw, and a head portion of a pressing shaft connected with the lead screw nut. A base is installed at the tail end of a cylinder barrel, a pressing shaft penetrates through the base, the bottom of the pressing shaft is connected with a lower flange, an eccentric shaft, an eccentric gear, an inner gear ring and a ball bowl are installed on the lower flange, one end of a spline shaft is installed on the eccentric shaft, the other end of the spline shaft is located in a lead screw, the eccentric gear is meshed with the inner gear ring, and the rear end of the eccentric gear is connected with the eccentric shaft. The front end of the eccentric gear is connected with the riveting seat, the rear end of the riveting seat is connected with the ball bowl, and the riveting rod is installed at the front end of the riveting seat. According to the rotary riveting machine, the length of the whole rotary riveting machine is shortened, the installation space is reduced, friction and noise in the riveting process are small, and the riveting quality can be better controlled.

Description

Technical Field

[0001] This utility model relates to the field of riveting equipment technology, specifically to a servo riveting machine. Background Technology

[0002] Current riveting equipment, such as riveting machines, connect two products together with rivets and are widely used in industries such as automobile manufacturing. Current riveting machines use screw drives to move a pressure shaft along a cylinder, which in turn moves the rivet at its front end to achieve riveting. However, the existing pressure shaft rotates during movement. To drive this rotation, a motor is currently installed at the end of the cylinder, which then drives the pressure shaft via a belt drive. This results in a relatively long riveting machine, requiring a large riveting space, and making the overall structure less compact. Furthermore, the riveting process generates significant friction and noise, and the riveting effect is not ideal. Utility Model Content

[0003] This invention provides a servo riveting machine that overcomes the shortcomings of existing servo riveting machines.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] The servo riveting machine includes a cylinder, a drive unit mounted at the rear end of the cylinder, a bearing housing mounted at the rear end of the cylinder, a bearing mounted at one point on the bearing housing, a lead screw mounted at one point on the bearing, one end of the lead screw connected to the drive unit, a lead screw nut mounted on the outside of the lead screw, the head of the pressure shaft connected to the lead screw nut, a base mounted at the end of the cylinder, the pressure shaft passing through the base, the bottom of the pressure shaft connected to a lower flange, an eccentric shaft, an eccentric gear, an internal gear ring, and a ball joint mounted at the lower flange, one end of a splined shaft mounted at the eccentric shaft, the other end of the splined shaft located inside the lead screw, the eccentric gear meshing with the internal gear ring, the rear end of the eccentric gear connected to the eccentric shaft, the front end of the eccentric gear connected to a riveting seat, the rear end of the riveting seat connected to a ball joint, a rivet rod mounted at the front end of the riveting seat, and a protective sleeve between the lower flange and the base.

[0006] Preferably, an inner ring of the spline shaft is installed on the spline shaft, and an outer ring of the spline shaft is installed on the outside of the inner ring of the spline shaft via steel balls. A spline shaft mounting plate is installed on the outer ring of the spline shaft. The spline shaft mounting plate passes through the pressure shaft and is connected to the base. A driven wheel is installed on the inner ring of the spline shaft. The driven wheel is connected to the driving wheel via a timing belt. The driving wheel is installed at the second drive device.

[0007] Preferably, a front sleeve is installed at the front end of the lower flange, the rivet passes through the front sleeve, a return spring is sleeved on the rivet seat, and the front end of the return spring is installed inside the front sleeve.

[0008] Preferably, a drive mounting plate is installed at the end of the cylinder, a drive device 2 is installed on one part of the drive mounting plate, the drive device 2 is a motor, a dust cover 1 is installed on the outside of the drive mounting plate 1, and the other side of the dust cover 1 is located at the base.

[0009] Preferably, an oiler mounting bracket is installed on the dust cover, an oiler is installed on the oiler mounting bracket, an oil pipe is connected to the oiler, and the other end of the oil pipe is connected to the lower flange.

[0010] Preferably, the pressure shaft has two parallel through slots, the timing belt passes through the two through slots, and the spline shaft mounting plate passes through one of the through slots.

[0011] Preferably, the drive unit includes a motor and a reducer. The motor is connected to the reducer, the reducer is connected to the reducer flange, a coupling is installed inside the reducer flange, the output end of the reducer is connected to the coupling, and the lead screw is connected to the coupling.

[0012] Preferably, a pressure sensor is installed between the reducer flange and the cylinder.

[0013] Preferably, a pressure sensor is installed at the front end of the lower flange, an adapter sleeve is installed at the front end of the pressure sensor, the pressure sensor is located between the ball cup and the internal gear ring, the front sheath is installed at the front end of the adapter sleeve, one end of the oil pipe is connected to the adapter sleeve, and the ball cup is located inside the adapter sleeve.

[0014] Preferably, the drive device includes a motor and a reducer. The reducer is mounted on a flange plate, and a dust cover is mounted on the front end of the flange plate. A drive wheel is mounted on the output end of the reducer. The drive wheel and the driven wheel are connected by a synchronous belt. The driven wheel is mounted on a connecting shaft. The connecting shaft is connected to a lead screw through a coupling. The connecting shaft passes through the flange plate. One end of the flange plate is mounted on the upper flange, and the upper flange is mounted on the cylinder.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] The design of the eccentric shaft, eccentric gear, and ball joint reduces friction and noise during the riveting process, allowing for better control of the final riveting quality and resulting in a more aesthetically pleasing rivet head shape. The structure driving the rivet rotation has been improved by incorporating a spline shaft, which optimizes the installation position of the second drive unit, shortens the overall length of the riveting machine, and reduces the required installation space. The motor driving the spline shaft is fixed and does not move up and down with the pressure shaft, thus reducing the motor's inertia and improving its control performance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of an embodiment of the present invention.

[0018] Figure 2This is a cross-sectional view of an embodiment of the present invention.

[0019] Figure 3 yes Figure 2 Enlarged diagram of point A in the middle.

[0020] Figure 4 This is a schematic diagram of the rivet part in one embodiment of this utility model.

[0021] Figure 5 This is a cross-sectional view of another embodiment of the present invention.

[0022] Figure 6 This is a schematic diagram of the rivet rod in another embodiment of this utility model.

[0023] Figure 7 This is a schematic diagram of another embodiment of the present invention.

[0024] Figure 8 This is a cross-sectional view of another embodiment of this utility model.

[0025] Figure 9 This is a schematic diagram of the connection between the spline shaft and the inner ring of the spline shaft in another embodiment of this utility model.

[0026] Figure 10 This is a schematic diagram of the final embodiment of this utility model. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] As shown in the figure, this utility model discloses a servo riveting machine, including a cylinder 1, a drive device 1 installed at the rear end of the cylinder 1, a bearing seat 2 installed at the rear end of the cylinder 1, a bearing 3 installed at the bearing seat 2, a lead screw 4 installed at the bearing 3, one end of the lead screw 4 connected to the drive device 1, a lead screw nut 5 installed on the outside of the lead screw 4, the head of a pressure shaft 6 connected to the lead screw nut 5, a base 7 installed at the end of the cylinder 1, the pressure shaft 6 passing through the base 7, the bottom of the pressure shaft 6 connected to a lower flange 8, an eccentric shaft 9, an eccentric gear 10, an internal gear ring 11 and a ball cup 12 installed at the lower flange 8, one end of a spline shaft 13 installed at the eccentric shaft 9, the other end of the spline shaft 13 located inside the lead screw 4, the hollow diameter of the lead screw 4 being larger than that of the spline shaft 13 to avoid the spline shaft 13. The eccentric gear 10 meshes with the internal gear ring 11. The rear end of the eccentric gear 10 is connected to the eccentric shaft 9, and the front end of the eccentric gear 10 is connected to the riveting seat 14. The rear end of the riveting seat 14 is connected to the ball cup 12, and the front end of the riveting seat 14 is fitted with a rivet 15. A protective sleeve 16 is provided between the lower flange 8 and the base 7. The protective sleeve 16 serves to protect the base 7.

[0029] When the drive device is working, it drives the lead screw 4 to rotate, which in turn drives the lead screw nut 5 to move linearly. The lead screw nut 5 drives the pressure shaft 6 to move linearly, and the pressure shaft 6 drives the lower flange 8 to move. Then, it drives the eccentric gear 10, ball cup 12, riveting seat 14 and rivet 15 to move linearly, thereby pushing and pressing the rivet.

[0030] Through the design of the eccentric shaft 9 and the eccentric gear 10, the eccentric gear 10 drives the riveting seat 14 to rotate, which in turn drives the rivet 15 to rotate, while the riveting seat 14 rotates along the ball joint 12. This ensures that the center point of the contact end face between the rivet shank and the rivet remains stationary relative to the machine spindle, while the rivet end face other than the center point oscillates accordingly with the rivet shank's movement. Friction and noise during the riveting process are also reduced. This embodiment allows for better control of the final riveting quality, and the rivet head shape is also more aesthetically pleasing.

[0031] In one embodiment of this utility model, a spline shaft inner ring 17 is installed on the spline shaft 13, and a spline shaft outer ring 19 is installed on the outside of the spline shaft inner ring 17 via steel balls 18. A spline shaft mounting plate 20 is installed on the spline shaft outer ring 19. The spline shaft mounting plate 20 passes through the pressure shaft 6 and is connected to the base 7. A driven wheel 21 is installed on the spline shaft inner ring 17. The driven wheel 21 and the driving wheel 22 are connected via a synchronous belt 23. The driving wheel 22 is installed at the second drive device.

[0032] In this embodiment, the outer ring 19 of the spline sleeve can rotate relative to the inner ring 17 of the spline shaft, but cannot move axially relative to it. The inner ring 17 of the spline shaft can move linearly relative to the spline shaft 13, but cannot rotate relative to it.

[0033] In one embodiment of this utility model, a front sleeve 24 is installed at the front end of the lower flange 8, a rivet 15 passes through the front sleeve 24, and a return spring 25 is sleeved on the rivet seat 14, with the front end of the return spring 25 installed inside the front sleeve 24.

[0034] The return spring 25 can achieve reset. For example, when the riveting is finished, the return spring 25 drives the riveting seat 14 and the rivet 15 to retract.

[0035] In one embodiment of this utility model, a drive mounting plate 26 is installed at the end of the cylinder 1, a drive device 27 is installed on the drive mounting plate 26, and a dust cover 28 is installed on the outside of the drive mounting plate 26. The other side of the dust cover 28 is located at the base 7.

[0036] When motor 27 operates, it drives drive wheel 22 to rotate, which in turn drives driven wheel 21 to rotate via synchronous belt 23. Driven wheel 21 drives inner ring 17 of splined shaft to rotate, and inner ring 17 of splined shaft drives splined shaft 13 to rotate, ultimately driving the rivet to rotate and completing the riveting.

[0037] By using the outer ring 19 of the spline sleeve and the inner ring 17 of the spline shaft, the motor 27 can be installed on one side of the cylinder, eliminating the need to install the motor 27 on the bottom of the cylinder. This greatly shortens the length of the riveting machine and reduces the installation time.

[0038] In one embodiment of this utility model, an oiler mounting bracket 29 is installed on the dust cover 28, an oiler 30 is installed on the oiler mounting bracket 29, an oil pipe 31 is connected to the oiler 30, and the other end of the oil pipe 31 is connected to the lower flange 8. To facilitate the installation of the oil pipe 31, a connector 32 is installed on the lower flange 8 in advance, and the oil pipe 31 is connected to the connector 32.

[0039] The lubricator can automatically add oil at specific times or after a specific number of times as needed, reducing downtime losses caused by manual oiling, making maintenance more convenient, more efficient, and extending the service life of parts.

[0040] In one embodiment of this utility model, two parallel through slots 61 are provided at the pressure shaft 6, a timing belt passes through the two through slots 61, and a spline shaft mounting plate 20 passes through one of the through slots 61.

[0041] The slot 61 is used to avoid interference between the pressure shaft 6 and the timing belt 23 and the splined shaft mounting plate 20. The motor 27 is fixed and does not move up and down with the pressure shaft, thereby reducing the motor's inertia and improving its control effect.

[0042] In one embodiment of this utility model, the drive device includes a motor 33 and a reducer 34. The motor 33 is connected to the reducer 34, the reducer 34 is connected to the reducer flange 35, a coupling 36 is installed inside the reducer flange 35, the output end of the reducer 34 is connected to the coupling 36, and the lead screw 4 is connected to the coupling 36.

[0043] This is a direct connection type, meaning that the motor 1 and reducer 34 are directly connected to the cylinder 1. This type is relatively long, but has little lateral space.

[0044] In one embodiment of this utility model, a pressure sensor 37 is installed between the reducer flange 35 and the cylinder 1.

[0045] In another embodiment, such as Figure 5 and Figure 6 A pressure sensor 37 is installed at the front end of the lower flange 8, and an adapter sleeve 38 is installed at the front end of the pressure sensor 37. The pressure sensor 37 is located between the ball cup 12 and the internal gear ring 11. The front sheath 24 is installed at the front end of the adapter sleeve 38. One end of the oil pipe 31 is connected to the adapter sleeve 38, and the ball cup 12 is located inside the adapter sleeve 38.

[0046] In this embodiment, the pressure sensor 37 is placed at the front end of the pressure shaft and directly contacts the ball cup 12, so the measured riveting force is more accurate.

[0047] In one embodiment of this utility model, the drive device includes a motor 33 and a reducer 34. The reducer 34 is mounted on a flange plate 39, and a dust cover 40 is installed at the front end of the flange plate 39. A drive wheel 41 is installed at the output end of the reducer 34. The drive wheel 41 and the driven wheel 42 are connected by a synchronous belt 43. The driven wheel 42 is mounted on a connecting shaft 44, which is connected to a lead screw 4 via a coupling 36. The connecting shaft 44 passes through the flange plate 39, and one end of the flange plate 39 is installed at an upper flange 45, which is installed at the cylinder 1. This embodiment is a bent type, meaning that the motor 33 is parallel to the cylinder 1, resulting in a shorter overall length but a larger lateral space.

[0048] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of this utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A servo riveting machine, characterized in that: The system includes a cylinder barrel, a drive unit mounted at the rear end of the cylinder barrel, a bearing housing mounted at the rear end of the cylinder barrel, a bearing mounted at one point on the bearing housing, a lead screw mounted at one point on the bearing, one end of the lead screw connected to the drive unit, a lead screw nut mounted on the outside of the lead screw, the head of the pressure shaft connected to the lead screw nut, a base mounted at the end of the cylinder barrel, the pressure shaft passing through the base, the bottom of the pressure shaft connected to the lower flange, an eccentric shaft, an eccentric gear, an internal gear ring, and a ball joint mounted at the lower flange, one end of a splined shaft mounted at the eccentric shaft, the other end of the splined shaft located inside the lead screw, the eccentric gear meshing with the internal gear ring, the rear end of the eccentric gear connected to the eccentric shaft, the front end of the eccentric gear connected to a riveting seat, the rear end of the riveting seat connected to the ball joint, a rivet rod mounted at the front end of the riveting seat, and a protective sleeve between the lower flange and the base.

2. The servo riveting machine according to claim 1, characterized in that: The inner ring of the spline shaft is installed on the spline shaft. The outer ring of the spline shaft is installed on the outside of the inner ring of the spline shaft through steel balls. The outer ring of the spline shaft is installed with a spline shaft mounting plate. The spline shaft mounting plate passes through the pressure shaft and is connected to the base. The inner ring of the spline shaft is installed with driven wheel one. Driven wheel one is connected to driving wheel one through a synchronous belt one. Driving wheel one is installed at the second drive device.

3. The servo riveting machine according to claim 1, characterized in that: A front sleeve is installed at the front end of the lower flange, the rivet passes through the front sleeve, and a return spring is fitted on the rivet seat, with the front end of the return spring installed inside the front sleeve.

4. The servo riveting machine according to claim 3, characterized in that: A drive mounting plate is installed at the end of the cylinder. A drive device is installed on one side of the drive mounting plate. The drive device is a motor. A dust cover is installed on the outside of the drive mounting plate. The other side of the dust cover is located at the base.

5. The servo riveting machine according to claim 4, characterized in that: A lubricator mounting bracket is installed on the dust cover, and the lubricator is installed on the lubricator mounting bracket. An oil pipe is connected to the lubricator, and the other end of the oil pipe is connected to the lower flange.

6. The servo riveting machine according to claim 2, characterized in that: The pressure shaft has two parallel through slots. The timing belt passes through both through slots, and the spline shaft mounting plate passes through one of the through slots.

7. The servo riveting machine according to claim 4, characterized in that: The drive unit includes a motor and a reducer. The motor is connected to the reducer, the reducer is connected to the reducer flange, a coupling is installed inside the reducer flange, the output end of the reducer is connected to the coupling, and the lead screw is connected to the coupling.

8. The servo riveting machine according to claim 7, characterized in that: A pressure sensor is installed between the reducer flange and the cylinder.

9. The servo riveting machine according to claim 7, characterized in that: A pressure sensor is installed at the front end of the lower flange, and an adapter sleeve is installed at the front end of the pressure sensor. The pressure sensor is located between the ball cup and the internal gear ring. The front sheath is installed at the front end of the adapter sleeve. One end of the oil pipe is connected to the adapter sleeve, and the ball cup is located inside the adapter sleeve.

10. The servo riveting machine according to claim 1, characterized in that: The drive unit includes a motor and a reducer. The reducer is mounted on a flange plate. A dust cover is mounted on the front end of the flange plate. A drive wheel is mounted on the output end of the reducer. The drive wheel and the driven wheel are connected by a synchronous belt. The driven wheel is mounted on a connecting shaft. The connecting shaft is connected to a lead screw through a coupling. The connecting shaft passes through the flange plate. One end of the flange plate is mounted on the upper flange. The upper flange is mounted on the cylinder.

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