Assembly fixture device for shaft

Abstract

The invention relates to the technical field of machinery, and discloses an assembly fixture device for a shaft, which comprises a flange mounting plate, a clamping plate, a clamping plate, a clamping plate, a clamping plate and a clamping plate, and is characterized in that the flange mounting plate is fixedly connected with a mechanical arm flange head at the tail end of a mechanical arm; a base frame is fixedly connected to the flange mounting disc, a plurality of reference mounting holes are formed in the base frame at intervals, and the upper reference mounting hole and the lower reference mounting hole form a mounting hole group; the two main arms are assembled on the base frame in a bilateral symmetry mode and fixed to one of the mounting hole sets through bolts, and a sliding groove is formed in the end, away from the base frame, of each main arm. A main air pipe connector is externally connected with an air pump through a pipeline, a disc type rubber air bag is inflated through the air pump, deflation is conducted through a micro electromagnetic valve, and clamping and clamping releasing of a shaft are achieved through contraction and expansion of the disc type rubber air bag and interval adjustment of inflatable chucks; and compared with an existing electric mechanical clamp, the risk that the outer surface of the shaft is scratched is reduced, and the anti-skid performance after clamping is higher.

Description

Technical Field

[0001] This invention relates to the field of mechanical technology, and in particular to a shaft assembly fixture device. Background Technology

[0002] During the assembly of the shaft, a robotic arm replaces manual labor to pick up the shaft and move it to the designated position for assembly. The existing robotic arm gripping parts are all electric grippers. Due to the large weight of the shaft, a high-power electric gripper is required. This increases the weight of the robotic arm end and increases the energy consumption of the robotic arm. In addition, the hard-on gripping of the shaft by the electric gripper can easily cause scratches on the outer surface of the shaft. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a shaft assembly fixture device to overcome the problems mentioned above.

[0004] The technical problem solved by this invention is achieved through the following technical solution: A shaft assembly fixture device, comprising: The flange mounting plate is fixedly connected to the robotic arm flange head at the end of the robotic arm by bolts; The base frame is fixedly connected to the flange mounting plate. The base frame has several reference mounting holes spaced apart, and two reference mounting holes at the top and bottom form a mounting hole group. Two main arms are symmetrically mounted on the base frame and fixed to one of the mounting hole groups by bolts. The end of the main arm away from the base frame is provided with a sliding groove. An auxiliary arm is located in the middle of the base frame, and the auxiliary arm is provided with a sliding groove; An inflatable chuck includes a slider slidably disposed within the groove and three pneumatic chuck wheels rotatably mounted at both ends of the slider. The three pneumatic chuck wheels have a clamping state and a non-clamping state and satisfy the following conditions: Clamping state: The center distance between the two pneumatic clamping wheels on the main arm minus the diameter of the pneumatic clamping wheel is smaller than the diameter of the clamped shaft, and the distance from the center of the pneumatic clamping wheel on the auxiliary arm to the line connecting the centers of the other two pneumatic clamping wheels minus the radius of the pneumatic clamping wheel is greater than the radius of the clamped shaft. Non-clamping state: The center distance between the two pneumatic clamping wheels on the main arm minus the diameter of the pneumatic clamping wheels is greater than the diameter of the clamped shaft; The air supply route is used to inflate the air clamp wheel.

[0005] In one embodiment, the main boom includes a boom head with two through holes and a boom rod integrally formed with the boom head, the slide groove being disposed at the end of the boom rod, and the boom head being fixed to the reference mounting hole by bolts.

[0006] In one embodiment, the air clamp wheel includes a rubber airbag base wheel rotatably mounted on the slider and a disc-shaped rubber airbag fitted in the annular recess of the rubber airbag base wheel. The disc-shaped rubber airbag increases in size after being inflated through the air supply route, and the axial elastic modulus of the disc-shaped rubber airbag is greater than its axial elastic modulus.

[0007] In one embodiment, a push plate extending beyond the axial length of the pneumatic clamping wheel is fixed at the end of the arm. After the disc-shaped rubber airbag is inflated, it contacts the push plate on one side. Under the action of the reaction force, the disc-shaped rubber airbag on the arm will move closer to the disc-shaped rubber airbag on the auxiliary arm to achieve a tightening clamping effect. At the same time, the radius of the disc-shaped rubber airbag increases after it is inflated, which clamps the shaft being clamped.

[0008] In one embodiment, a spring is further included, which is assembled in the groove of the inflatable chuck and the auxiliary arm. The two ends of the spring mounted on the arm are respectively fixed on the arm and the slider and push the slider toward the push plate. The two ends of the spring mounted on the auxiliary arm are respectively fixed on the auxiliary arm and the corresponding slider and push the slider to the initial position.

[0009] In one embodiment, the slider is hollow and symmetrically equipped with dynamic sealing bearings inside. The rubber airbag base wheel shaft is assembled with the dynamic sealing bearings. An air pipe is provided inside the rubber airbag base wheel shaft, which communicates with the inner cavity of the slider and has an air nozzle at the other end. The inflation port of the disc-type rubber airbag is fixedly connected to the air nozzle.

[0010] In one embodiment, a miniature solenoid valve communicating with its inner cavity is also fixed on the slider. When the clamp is released, the miniature solenoid valve opens, and air is quickly discharged under the indirect pressure of the spring and the elastic recovery of the disc-shaped rubber airbag, and the inflatable clamp is reset.

[0011] In one embodiment, the air supply route includes a rubber air tube communicating with the inner cavity of the slider, a main air tube connector fixed on the base frame, and a three-part pipe connector connected to the main air tube connector. The three-part pipe connector communicates with three of the rubber air tubes respectively to form an air supply route to the slider. Specifically, the auxiliary arm and the arm rod are provided with cavities for assembling the rubber air tubes. The rubber air tubes are flexible and have sufficient length allowance for the normal movement of the inflatable clamp. The main air tube connector is connected to an external air pump through a pipeline. The air pump inflates the disc-shaped rubber airbag and deflates it through the micro solenoid valve.

[0012] The advantages and positive effects of this invention are as follows: the main air pipe connector is connected to an external air pump through the pipeline, the air pump inflates the disc-shaped rubber airbag, and the air is released through the micro solenoid valve. The clamping and releasing of the shaft is achieved by utilizing the contraction and expansion of the disc-shaped rubber airbag and the spacing adjustment of the inflatable clamp. Compared with existing electromechanical clamps, it is lighter, reduces the risk of scratching the outer surface of the shaft, and has higher anti-slip properties after clamping. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 This is a schematic diagram of the application structure of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention; Figure 3 This is an enlarged structural schematic diagram of the slider 26, the rubber airbag base wheel 28, and the miniature solenoid valve 31 in this invention; Figure 4 yes Figure 3 A front view structural diagram (sectioned by slider 26); Figure 5 This is a schematic diagram of the structure of the present invention in its non-clamping state; Figure 6 This is a schematic diagram of the structure of the present invention in the clamping state.

[0015] The markings in the attached diagram are described as follows: 10. Transport line; 11. Robotic arm; 12. Shaft assembler; 13. Robotic arm flange; 14. Flange mounting plate; 15. Pneumatic clamp wheel; 16. Base frame; 17. Reference mounting hole; 18. Main air pipe connector; 19. Arm head; 20. Arm rod; 21. Push plate; 22. Inflatable chuck; 23. Main arm; 24. Auxiliary arm; 25. Spring; 26. Slider; 27. Rubber air pipe; 28. Rubber air bladder base wheel; 29. ​​Air nozzle; 30. Dynamic seal bearing; 31. Miniature solenoid valve; 32. Disc-type rubber air bladder. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention. The embodiments of the invention are further described in detail below with reference to the accompanying drawings: like Figure 1-6 As shown, the shaft assembly fixture device of the present invention includes: Transport line 10 is used to transport the shafts to be assembled; Robotic arm 11 is used to pick up the shaft from the transport line 10 and move it to a designated position for subsequent assembly; Shaft assembler 12 performs press fitting on the shaft; the above is existing technology and will not be described in detail. It also includes a flange mounting plate 14, which is fixedly connected to the robotic arm flange head 13 at the end of the robotic arm 11 by bolts; The base frame 16 is fixedly connected to the flange mounting plate 14. The base frame 16 has several reference mounting holes 17 spaced apart. The upper and lower reference mounting holes 17 form a mounting hole group, which can be connected by bolts or welding. Two main arms 23 are symmetrically mounted on the base frame 16 and fixed to one of the mounting hole groups by bolts. The end of the main arm 23 away from the base frame 16 is provided with a sliding groove. An auxiliary arm 24 is disposed in the middle of the base frame 16, and the auxiliary arm 24 is provided with a sliding groove; The inflatable chuck 22 includes a slider 26 slidably disposed in the groove and air clamping wheels 15 rotatably mounted at both ends of the slider 26. The three air clamping wheels 15 have a clamping state and a non-clamping state and satisfy the following conditions: Clamping state: The center distance between the two pneumatic clamping wheels 15 on the main arm 23 minus the diameter of the pneumatic clamping wheel 15 is less than the diameter of the clamped shaft, and the distance from the center of the pneumatic clamping wheel 15 on the auxiliary arm 24 to the line connecting the centers of the other two pneumatic clamping wheels 15 minus the radius of the pneumatic clamping wheel 15 is greater than the radius of the clamped shaft. Non-clamping state: The center distance between the two pneumatic clamping wheels 15 located on the main arm 23 minus the diameter of the pneumatic clamping wheel 15 is greater than the diameter of the clamped shaft; The air supply route is used to inflate the air clamp wheel 15.

[0017] In one embodiment, the main arm 23 includes an arm head 19 with two through holes and an arm rod 20 integrally formed with the arm head 19. The sliding groove is provided at the end of the arm rod 20. The arm head 19 is fixed to the reference mounting hole 17 by bolts. The distance between the two main arms 23 can be adjusted as needed to achieve appropriate adjustment of the clamping range.

[0018] In one embodiment, the air clamp wheel 15 includes a rubber airbag base wheel 28 rotatably mounted on the slider 26 and a disc rubber airbag 32 fitted in the annular recess of the rubber airbag base wheel 28. The disc rubber airbag 32 increases in size after being inflated through the air supply route. The axial elastic modulus of the disc rubber airbag 32 is greater than its axial elastic modulus, and the diameter of the disc rubber airbag 32 increases after inflation.

[0019] In one embodiment, a push plate 21 extending beyond the axial length of the pneumatic clamping wheel 15 is fixedly provided at the end of the arm 20. After the disc-shaped rubber airbag 32 inflates, it contacts the push plate 21 on one side. Under the action of the reaction force, the disc-shaped rubber airbag 32 on the arm 20 moves closer to the disc-shaped rubber airbag 32 on the auxiliary arm 24 to achieve a tightening clamping effect. Simultaneously, the increased radius of the inflated disc-shaped rubber airbag 32 further clamps the shaft being clamped (e.g., ...). Figure 6 It should be noted that although the disc-shaped rubber airbag 32 is a flexible component, the internal air pressure after inflation causes its external dimensions to tend to solidify. It still has high clamping stability under high pressure, and the rubber itself has good anti-slip properties and will not scratch the shaft surface. Compared with the prior art, it has many improvements.

[0020] In one embodiment, to facilitate reset and allow the shaft to disengage from the clamp, a spring 25 is included. The spring 25 is fitted within a groove in the pneumatic chuck 22 and the auxiliary arm 24, wherein... Figure 2 The spring 25 mounted on the arm 20 has its two ends fixed to the arm 20 and the slider 26 respectively, and pushes the slider 26 toward the push plate 21. The spring 25 mounted on the auxiliary arm 24 has its two ends fixed to the auxiliary arm 24 and the corresponding slider 26 respectively, and pushes the slider 26 to the initial position.

[0021] In one embodiment, the slider 26 is hollow and symmetrically equipped with dynamic sealing bearings 30 inside. The rotating shaft of the rubber airbag base wheel 28 is assembled with the dynamic sealing bearings 30. An air tube is provided inside the rotating shaft of the rubber airbag base wheel 28, which communicates with the inner cavity of the slider 26 and has an air nozzle 29 at the other end. The inflation port of the disc rubber airbag 32 is fixedly connected to the air nozzle 29.

[0022] In one embodiment, a miniature solenoid valve 31 communicating with its inner cavity is also fixed on the slider 26. When it is necessary to release the clamp, the miniature solenoid valve 31 opens, and under the indirect pressure of the spring 25 and the elastic recovery of the disc rubber airbag 32, the air is quickly discharged, and the inflatable chuck 22 resets, thereby separating and releasing the shaft from the clamp.

[0023] In one embodiment, the air supply route includes a rubber air tube 27 communicating with the inner cavity of the slider 26, a main air tube connector 18 fixed on the base frame 16, and a three-part pipe connector connected to the main air tube connector 18. The three-part pipe connector communicates with three of the rubber air tubes 27 respectively to form an air supply route to the slider 26. Specifically, the auxiliary arm 24 and the arm 20 are provided with cavities for assembling the rubber air tubes 27. The rubber air tubes 27 are flexible and have sufficient length margin for the inflatable chuck 22 to move normally. The main air tube connector 18 is connected to an external air pump through a pipeline. The air pump inflates the disc-shaped rubber airbag 32 and deflates it through the micro solenoid valve 31. The clamping and releasing of the shaft is achieved by utilizing the contraction and expansion of the disc-shaped rubber airbag 32 and the spacing adjustment of the inflatable chuck 22. Compared with existing electromechanical clamps, it is lighter, reduces the risk of scratching the outer surface of the shaft, and has higher anti-slip performance after clamping.

[0024] It should be emphasized that the embodiments described in this invention are illustrative rather than limiting. Therefore, this invention is not limited to the embodiments described in the specific implementation. Any other implementation methods derived by those skilled in the art based on the technical solutions of this invention also fall within the scope of protection of this invention.

Claims

1. A shaft assembly fixture device, characterized in that... include: The flange mounting plate (14) is fixedly connected to the robotic arm flange head (13) at the end of the robotic arm (11) by bolts; The base frame (16) is fixedly connected to the flange mounting plate (14). The base frame (16) has several reference mounting holes (17) spaced apart. The upper and lower reference mounting holes (17) form a mounting hole group. Two main arms (23) are symmetrically mounted on the base frame (16) and fixed to one of the mounting hole groups by bolts. The end of the main arm (23) away from the base frame (16) is provided with a sliding groove. An auxiliary arm (24) is provided in the middle of the base frame (16), and the auxiliary arm (24) is provided with a sliding groove; The inflatable chuck (22) includes a slider (26) slidably disposed in the groove and air chuck wheels (15) rotatably mounted at both ends of the slider (26). The three air chuck wheels (15) have a clamping state and a non-clamping state and satisfy the following conditions: Clamping state: The center distance between the two pneumatic clamping wheels (15) on the main arm (23) minus the diameter of the pneumatic clamping wheel (15) is smaller than the diameter of the clamped shaft, and the distance from the center of the pneumatic clamping wheel (15) on the auxiliary arm (24) to the line connecting the centers of the other two pneumatic clamping wheels (15) minus the radius of the pneumatic clamping wheel (15) is greater than the radius of the clamped shaft; Non-clamping state: The center distance between the two pneumatic clamping wheels (15) located on the main arm (23) minus the diameter of the pneumatic clamping wheel (15) is greater than the diameter of the clamped shaft; The air supply route is used to inflate the air clamp wheel (15).

2. The shaft assembly fixture device according to claim 1, characterized in that: The main arm (23) includes an arm head (19) with two through holes and an arm rod (20) integrally formed with the arm head (19). The slide groove is provided at the end of the arm rod (20), and the arm head (19) is fixed to the reference mounting hole (17) by bolts.

3. The shaft assembly fixture device according to claim 2, characterized in that: The air clamp wheel (15) includes a rubber airbag base wheel (28) rotatably mounted on the slider (26) and a disc rubber airbag (32) fitted in the annular recess of the rubber airbag base wheel (28). The disc rubber airbag (32) increases in size after being inflated through the air supply route. The axial elastic modulus of the disc rubber airbag (32) is greater than its axial elastic modulus.

4. The shaft assembly fixture device according to claim 3, characterized in that: The arm (20) is fixed with a push plate (21) that extends beyond the axial length of the pneumatic clamping wheel (15). After the disc rubber airbag (32) is inflated, it contacts the push plate (21) on one side. Under the action of the reaction force, the disc rubber airbag (32) on the arm (20) will move closer to the disc rubber airbag (32) on the auxiliary arm (24) to achieve a tightening clamping effect. At the same time, after the disc rubber airbag (32) is inflated, its radius increases and it clamps the shaft being clamped.

5. The shaft assembly fixture device according to claim 4, characterized in that: It also includes a spring (25), which is assembled in the groove of the inflatable chuck (22) and the auxiliary arm (24). The two ends of the spring (25) mounted on the arm (20) are respectively fixed on the arm (20) and the slider (26) and push the slider (26) towards the push plate (21). The two ends of the spring (25) mounted on the auxiliary arm (24) are respectively fixed on the auxiliary arm (24) and the corresponding slider (26) and push the slider (26) to the initial position.

6. The shaft assembly fixture device according to claim 5, characterized in that: The slider (26) is hollow and symmetrically equipped with dynamic sealing bearings (30). The rotating shaft of the rubber airbag base wheel (28) is assembled with the dynamic sealing bearings (30). The rotating shaft of the rubber airbag base wheel (28) is provided with an air pipe that communicates with the inner cavity of the slider (26) and has an air nozzle (29) at the other end. The inflation port of the disc rubber airbag (32) is fixedly connected to the air nozzle (29).

7. The shaft assembly fixture device according to claim 6, characterized in that: The slider (26) is also fixedly provided with a miniature solenoid valve (31) communicating with its inner cavity. When the clamp is released, the miniature solenoid valve (31) opens, and under the indirect pressure of the spring (25) and the elastic recovery of the disc rubber airbag (32), the air is quickly discharged, and the inflatable clamp (22) resets.

8. The shaft assembly fixture device according to claim 7, characterized in that: The air supply route includes a rubber air tube (27) communicating with the inner cavity of the slider (26), a main air tube connector (18) fixed on the base frame (16), and a three-part pipe connector connected to the main air tube connector (18). The three-part pipe connector communicates with three rubber air tubes (27) respectively and forms an air supply route to the slider (26). Specifically, the auxiliary arm (24) and the arm rod (20) are provided with cavities for assembling the rubber air tubes (27). The rubber air tubes (27) are flexible and have sufficient length margin for the inflatable clamp (22) to move normally. The main air tube connector (18) is connected to an external air pump through a pipeline. The air pump inflates the disc-shaped rubber airbag (32) and deflates it through the micro solenoid valve (31).

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