Automatic tightening equipment for pump cover bolt

Abstract

The utility model discloses automatic tightening equipment for pump cover bolts, and relates to the technical field of oil pump assembly. The top of the workbench assembly is provided with an aluminum profile protection frame; the conveying track is arranged at the bottom of the aluminum profile protection frame; the tray jacking mechanism is used for bearing workpieces and driving the workpieces to move up and down, and the tray jacking mechanism is movably arranged on the conveying track; the six-axis tightening mechanism is arranged on the inner side of the aluminum profile protection frame and used for automatically tightening the six sets of pump cover bolts on the tray jacking mechanism, and the six-axis tightening mechanism comprises a supporting rack arranged on the inner side of the aluminum profile protection frame; the first lifting table is arranged on the supporting table frame in a liftable mode, six sets of tightening driving mechanisms are arranged on the first lifting table, and the six sets of tightening driving mechanisms move along with lifting of the first lifting table; and the second lifting table is arranged on the supporting rack in a liftable mode, and six sets of tightening operation ends are arranged on the lower surface of the second lifting table and used for bolt feeding and tightening.

Description

Technical Field

[0001] The utility model relates to the technical field of oil pump assembly, in particular to automatic tightening equipment for pump cover bolts. Background Art

[0002] The oil pump cover is assembled by bolts. Bolts are a widely used detachable fixed connection with the advantages of simple structure, reliable connection, and easy assembly and disassembly. Bolt connections are widely used in various large and heavy electromechanical equipment.

[0003] In traditional mechanical assembly operations, the manual bolt tightening operation has been transitioned to mechanical assembly, and has been largely replaced by automated equipment. At present, the bolts on large instruments and equipment are mostly installed by pneumatic equipment, or workers use pneumatic equipment to install them. The equipment mainly uses screw tightening equipment to complete it manually, which has low productivity and poor safety. At the same time, similar equipment can only tighten one bolt at a time, which is difficult to meet the requirements of modern industrial development. In order to improve production efficiency, it is necessary to design automatic tightening equipment for pump cover bolts. Utility Model Content

[0004] The utility model aims to solve the above problems and provide an automatic tightening device for pump cover bolts.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The pump cover bolt automatic tightening device of the utility model comprises:

[0007] A workbench assembly, with an aluminum profile protection frame on the top;

[0008] A conveying track, which is arranged at the bottom of the aluminum profile protection frame;

[0009] A tray lifting mechanism, which is used to carry the workpiece and drive the workpiece to move up and down, and the tray lifting mechanism can be movably arranged on the conveying track; and

[0010] A six-axis tightening mechanism is arranged inside the aluminum profile protection frame to automatically tighten six groups of pump cover bolts on the tray lifting mechanism. The six-axis tightening mechanism includes:

[0011] A support frame is arranged inside the aluminum profile protection frame.

[0012] A first lifting platform, which is movably disposed on the support frame, and six sets of tightening drive mechanisms are disposed on the first lifting platform, and the six sets of tightening drive mechanisms move up and down along with the first lifting platform; and

[0013] A second lifting platform is liftably arranged on the supporting platform. Six groups of tightening operating ends are arranged on the lower surface of the second lifting platform for loading and tightening bolts. The six groups of tightening driving mechanisms are arranged in one-to-one correspondence with the six groups of tightening operating ends. A transmission mechanism is arranged between the tightening driving mechanism and the corresponding tightening operating end.

[0014] Furthermore, the pallet lifting mechanism includes a bottom pallet, which is arranged on the conveying track and moves along the conveying track, a top pallet is arranged above the bottom pallet, a lifting guide column is arranged between the top pallet and the bottom pallet, and a first cylinder is arranged at the center position of the bottom pallet, and the telescopic end of the first cylinder is connected to the center position of the bottom of the top pallet.

[0015] Furthermore, positioning pins are provided on the bottom tray to assist in positioning the workpiece.

[0016] Further, a linear guide is arranged on the support frame in a vertical direction, a first lifting block and a second lifting block are arranged on the linear guide, the first lifting block and the second lifting block slide on the linear guide, the first lifting block is located above the second lifting block, the first lifting platform is arranged on the first lifting block and moves up and down with the first lifting block, and the second lifting platform is arranged on the second lifting block and moves up and down with the second lifting block;

[0017] A second cylinder is arranged on the top of the support frame, and a telescopic end of the second cylinder is connected to the first lifting platform;

[0018] A connecting rod is connected to the lower surface of the first lifting platform, the lower end of the connecting rod passes through the second lifting platform and moves relative to the second lifting platform, and a limiter is arranged below the second lifting platform to prevent the connecting rod from escaping upward from the second lifting platform, and a rectangular coil spring is sleeved on the connecting rod, and the rectangular coil spring is compressed between the upper end of the connecting rod and the second lifting platform;

[0019] A buffer is arranged on the supporting frame and below the second lifting platform.

[0020] Furthermore, the tightening drive mechanism includes an electric wrench, an output end of the electric wrench is connected to a pneumatic rod, the pneumatic rod extends downward through the first lifting platform, and the pneumatic rod is rotatably connected to the first lifting platform via a bearing.

[0021] Furthermore, the tightening operation end includes:

[0022] The duckbill body is a hollow structure with a vertical through hole, one side of the duckbill body has a channel for the bolt to enter and a screw guide extending outward;

[0023] An external fixed tube, which is connected to the upper end of the duckbill body, and the upper end of the external fixed tube is fixedly connected to the lower surface of the second lifting platform;

[0024] A guide sleeve, the upper end of which is sleeved on the lower end of the duckbill body and is connected to the vertical through hole of the duckbill body;

[0025] a wrench, which is disposed in the vertical through hole of the duckbill body and moves axially and rotates radially in the vertical through hole, and the wrench is used to tighten the bolt; and

[0026] The clamping claws are arranged in two groups on both sides of the duckbill body.

[0027] Furthermore, the middle part of the clamp is hinged to the outside of the duckbill body and the lower end extends into the inside of the duckbill body. The lower ends of the two groups of clamps extending into the inside of the duckbill body form a positioning groove for a positioning bolt to straighten the bolt to a vertical state.

[0028] Furthermore, the transmission mechanism comprises:

[0029] a pneumatic extension rod coaxially connected to the lower end of the pneumatic rod, the pneumatic extension rod extending downward to below the second lifting platform and coaxially connected to the upper end of the wrench; and

[0030] An oil-free bushing is vertically arranged on the second lifting platform and is connected to the external fixing tube. The pneumatic extension rod is passed through the oil-free bushing to extend downward to the bottom of the second lifting platform. The pneumatic extension rod performs radial rotation and axial movement in the oil-free bushing.

[0031] Furthermore, an operation panel is provided on the front side of the aluminum profile protection frame.

[0032] Furthermore, the six groups of tightening operation ends are arranged in one-to-one correspondence with the positions of tightening bolts on the pump cover.

[0033] In the above technical solution, the pump cover bolt automatic tightening device provided by the utility model has the following features:

[0034] Beneficial effects:

[0035] The bolt tightening operation of this equipment is completed automatically, and the six-axis tightening mechanism can simultaneously complete the tightening of six bolts, which eliminates manual operation, improves safety, and greatly improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0037] Figure 1 A schematic diagram of the structure of the automatic tightening device for pump cover bolts provided by an embodiment of the utility model;

[0038] Figure 2 A front view of the automatic tightening device for pump cover bolts provided by an embodiment of the utility model;

[0039] Figure 3 A top view of the automatic tightening device for pump cover bolts provided by an embodiment of the utility model;

[0040] Figure 4 A schematic diagram of the structure of a six-axis tightening mechanism of an automatic tightening device for pump cover bolts provided by an embodiment of the utility model;

[0041] Figure 5 A side view of a six-axis tightening mechanism of an automatic tightening device for pump cover bolts provided by an embodiment of the utility model;

[0042] Figure 6 A structural schematic diagram of a tray lifting mechanism of an automatic pump cover bolt tightening device provided by an embodiment of the utility model;

[0043] Figure 7 A structural schematic diagram of a tightening operation end of a pump cover bolt automatic tightening device provided by an embodiment of the utility model;

[0044] Figure 8 A schematic diagram of a clamping jaw positioning bolt at a tightening operation end of an automatic tightening device for pump cover bolts provided by an embodiment of the utility model;

[0045] Fig. 9 A schematic diagram of bolt feeding at the tightening operation end of the automatic tightening device for pump cover bolts provided by an embodiment of the utility model;

[0046] Fig.10 A schematic diagram of the structure of the clamping jaws at the tightening operation end of the automatic tightening device for pump cover bolts provided by an embodiment of the utility model;

[0047] Fig.11 A side view of two sets of jaws at the tightening operation end of the automatic tightening device for pump cover bolts provided in an embodiment of the utility model.

[0048] Description of reference numerals:

[0049] 1. Workbench assembly; 2. Aluminum profile protection frame; 3. Conveyor track; 4. Support frame; 5. First lifting platform; 6. Second lifting platform; 7. Bottom tray; 8. Top tray; 9. Lifting guide column; 10. First cylinder; 11. Locating pin; 12. Linear guide; 13. First lifting block; 14. Second lifting block; 15. Second cylinder; 16. Connecting rod; 17. Rectangular coil spring; 18. Buffer; 19. Electric wrench; 20. Pneumatic rod; 21. Duckbill body; 22. External fixing tube; 23. Guide sleeve; 24. Wrench head; 25. Gripper; 26. Pneumatic extension rod; 27. Oil-free bushing; 28. Operation panel. DETAILED DESCRIPTION

[0050] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0051] See also Figure 1-11 , automatic tightening equipment for pump cover bolts, including:

[0052] A workbench assembly 1, on the top of which an aluminum profile protection frame 2 is arranged, the workbench assembly 1 serves as a supporting structure to support the aluminum profile protection frame 2, and the structural components of the equipment are assembled through the aluminum profile protection frame 2;

[0053] A conveying track 3, which is arranged at the bottom of the aluminum profile protection frame 2 and arranged horizontally, is used to convey the workpiece to be processed;

[0054] A pallet lifting mechanism, which is used to carry the workpiece and drive the workpiece to move up and down. The pallet lifting mechanism can be movably arranged on the conveying track 3 to realize the delivery of the workpiece, and after the workpiece is delivered to the right place, the pallet lifting mechanism is used to lift the workpiece to the assembly position for subsequent bolt tightening operation; and

[0055] The six-axis tightening mechanism is arranged inside the aluminum profile protection frame 2 to automatically tighten the six sets of pump cover bolts on the tray lifting mechanism. The six-axis tightening mechanism includes:

[0056] The support frame 4 is arranged inside the aluminum profile protection frame 2

[0057] A first lifting platform 5 is escalably disposed on the support frame 4, and six sets of tightening drive mechanisms are disposed on the first lifting platform 5, and the six sets of tightening drive mechanisms move up and down with the first lifting platform 5; and

[0058] The second lifting platform 6 is liftably arranged on the supporting platform 4. Six groups of tightening operating ends are arranged on the lower surface of the second lifting platform 6 for loading and tightening bolts. The six groups of tightening driving mechanisms are arranged one by one with the six groups of tightening operating ends. A transmission mechanism is arranged between the tightening driving mechanism and the corresponding tightening operating end, so that the tightening driving mechanism drives the tightening operating end under the drive of the transmission mechanism to realize the bolt tightening operation.

[0059] Specifically, the first lifting platform 5 and the second lifting platform 6 are used to drive the six sets of tightening drive mechanisms and the six sets of tightening operating ends to move up and down, and in the step where the bolts need to be tightened, the six sets of tightening drive mechanisms and the six sets of tightening operating ends are lowered to the tooling position to tighten the bolts.

[0060] Furthermore, the pallet lifting mechanism includes a bottom pallet 7, which is arranged on the conveying track 3 and moves along the conveying track 3, a top pallet 8 is arranged above the bottom pallet 7, a lifting guide column 9 is arranged between the top pallet 8 and the bottom pallet 7, and a first cylinder 10 is arranged at the center position of the bottom pallet 7, and the telescopic end of the first cylinder 10 is connected to the center position of the bottom of the top pallet 8.

[0061] Furthermore, positioning pins 11 are provided on the bottom tray 7 to assist in positioning the workpiece.

[0062] Specifically, the workpiece is placed on the bottom tray 7 and positioned by the positioning pins 11. The top tray 8 is lifted up by the drive of the first cylinder 10 to lift the workpiece to the assembly station. During this process, the lifting guide column 9 plays a role in guiding the lifting of the top tray 8.

[0063] Further, a linear guide rail 12 is arranged on the support frame 4 in the vertical direction, a first lifting block 13 and a second lifting block 14 are arranged on the linear guide rail 12, the first lifting block 13 and the second lifting block 14 slide on the linear guide rail 12, the first lifting block 13 is located above the second lifting block 14, the first lifting platform 5 is arranged on the first lifting block 13 and moves up and down with the first lifting block 13, and the second lifting platform 6 is arranged on the second lifting block 14 and moves up and down with the second lifting block 14;

[0064] A second cylinder 15 is provided on the top of the support frame 4, and a telescopic end of the second cylinder 15 is connected to the first lifting platform 5;

[0065] The lower surface of the first lifting platform 5 is connected with a connecting rod 16, the lower end of the connecting rod 16 passes through the second lifting platform 6 and moves relative to the second lifting platform 6, and the lower end of the connecting rod 16 is located below the second lifting platform 6. A limiter is provided to prevent the connecting rod 16 from escaping from the second lifting platform 6 upwards, and a rectangular coil spring 17 is sleeved on the connecting rod 16, and the rectangular coil spring 17 is compressed between the upper end of the connecting rod 16 and the second lifting platform 6;

[0066] A buffer 18 is disposed on the support frame 4 and below the second lifting platform 6 .

[0067] Specifically, when the second cylinder 15 pushes the first lifting platform 5 to move downward, the first lifting platform 5 drives the connecting rod 16 to move downward, and compresses the rectangular coil spring 17, so that the second lifting platform 6 then moves downward. After descending to a specified height, the second lifting platform 6 stops through the buffer 18. In this process, the tightening drive mechanism and the tightening operation end are coordinated. After the bolts are tightened, the first lifting platform 5 is pulled back to the initial position by the second cylinder 15, and the second lifting platform 6 is pulled back to the initial position at the same time under the action of the connecting rod 16 and its limiter.

[0068] Furthermore, the tightening drive mechanism includes an electric wrench 19, an output end of the electric wrench 19 is connected to a pneumatic rod 20, the pneumatic rod 20 extends downward through the first lifting platform 5, and the pneumatic rod 20 is rotatably connected to the first lifting platform 5 via a bearing.

[0069] Further, the tightening operation end includes:

[0070] The duckbill body 21 is a hollow structure with a vertical through hole. One side of the duckbill body 21 has a channel for the bolt to enter and a screw guide extending outward;

[0071] An external fixed tube 22, which is connected to the upper end of the duckbill body 21, and the upper end of the external fixed tube 22 is fixedly connected to the lower surface of the second lifting platform 6;

[0072] A guide sleeve 23, the upper end of which is sleeved on the lower end of the duckbill body 21 and communicated with the vertical through hole of the duckbill body 21;

[0073] a wrench 24, which is disposed in the vertical through hole of the duckbill body 21 and moves axially and rotates radially in the vertical through hole, and the wrench 24 is used to tighten the bolt; and

[0074] The clamping claws 25 are arranged in two groups on both sides of the duckbill body 21 .

[0075] Furthermore, the middle part of the clamping claw 25 is hinged to the outside of the duckbill body 21, and the lower end part extends into the duckbill body 21. The lower ends of the two groups of clamping claws 25 extending into the duckbill body 21 form a positioning groove for the positioning bolt to straighten the bolt to a vertical state.

[0076] Specifically, during the descent of the first lifting platform 5 and the second lifting platform 6, the bolts are simultaneously fed into the duckbill body 21 of the tightening operation end through the screw guide tube by automatic nail blowing, and the bolts are simultaneously positioned by two sets of clamps 25 to straighten the bolts to a vertical state. Therefore, after the first lifting platform 5 and the second lifting platform 6 are descended, the bolts will be aligned with the tightening bolt positions on the workpiece, and then the first lifting platform 5 continues to descend, but the second lifting platform 6 does not continue to descend, the rectangular coil spring 17 continues to be compressed, and the electric wrench 19 drives the pneumatic rod 20 to rotate, and drives the wrench head 24 to rotate under the transmission of the transmission mechanism, that is, the process in which the first lifting platform 5 continues to descend but the second lifting platform 6 does not continue to descend belongs to pushing the wrench head 24 to feed, and the wrench head 24 rotates while feeding to complete the purpose of tightening the bolts.

[0077] Furthermore, the transmission mechanism comprises:

[0078] A pneumatic extension rod 26, which is coaxially connected to the lower end of the pneumatic rod 20, and the pneumatic extension rod 26 extends downward to below the second lifting platform 6 and is coaxially connected to the upper end of the wrench head 24; and

[0079] The oil-free bushing 27 is vertically arranged on the second lifting platform 6 and is connected to the external fixed tube 22. The pneumatic extension rod 26 is passed through the oil-free bushing 27 to extend downward to the bottom of the second lifting platform 6. The pneumatic extension rod 26 rotates radially and moves axially in the oil-free bushing 27.

[0080] Specifically, the pneumatic extension rod 26 is in the process of radially rotating and axially moving in the oil-free bushing 27, that is, the process of driving the wrench 24 to feed downward and rotate to tighten the bolt.

[0081] Furthermore, an operation panel 28 is provided on the front side of the aluminum profile protection frame 2. The operation panel 28 can be provided with a display for operation, and the device is programmed and controlled by a PLC control system. Its specific electrical connection and control are common knowledge known to technical personnel in this field and will not be repeated here.

[0082] Furthermore, the six sets of tightening operation ends are arranged in one-to-one correspondence with the positions of the tightening bolts on the pump cover, so that the six sets of tightening operation ends can be raised and lowered synchronously and the tightening operation of the bolts can be performed, thereby improving production efficiency.

[0083] In summary, the bolt tightening operation of this equipment is completed automatically, and the six-axis tightening mechanism can simultaneously complete the tightening of six bolts, which eliminates manual operation, improves safety, and greatly improves production efficiency.

[0084] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. Automatic tightening equipment for pump cover bolts, characterized in that: include: A workbench assembly (1) having an aluminum profile protection frame (2) disposed on the top; A conveying track (3), which is arranged at the bottom of the aluminum profile protection frame (2); A tray lifting mechanism, which is used to carry the workpiece and drive the workpiece to move up and down, and the tray lifting mechanism can be movably arranged on the conveying track (3); and A six-axis tightening mechanism is arranged inside the aluminum profile protection frame (2) to automatically tighten six groups of pump cover bolts on the tray lifting mechanism, and the six-axis tightening mechanism comprises: A support frame (4) is arranged inside the aluminum profile protection frame (2) A first lifting platform (5) is escalably arranged on the support frame (4), and six sets of tightening drive mechanisms are arranged on the first lifting platform (5), and the six sets of tightening drive mechanisms move up and down along with the first lifting platform (5); as well as A second lifting platform (6) is liftably arranged on the supporting platform (4), and six groups of tightening operation ends are arranged on the lower surface of the second lifting platform (6) for loading and tightening bolts. The six groups of tightening driving mechanisms are arranged in a one-to-one correspondence with the six groups of tightening operation ends, and a transmission mechanism is arranged between the tightening driving mechanisms and the corresponding tightening operation ends.

2. The pump cover bolt automatic tightening device according to claim 1 is characterized in that: The pallet lifting mechanism comprises a bottom pallet (7), wherein the bottom pallet (7) is arranged on the conveying track (3) and moves along the conveying track (3), a top pallet (8) is arranged above the bottom pallet (7), a lifting guide column (9) is arranged between the top pallet (8) and the bottom pallet (7), a first cylinder (10) is arranged at the center position of the bottom pallet (7), and a telescopic end of the first cylinder (10) is connected to the center position of the bottom of the top pallet (8).

3. The automatic tightening device for pump cover bolts according to claim 2 is characterized in that: The bottom tray (7) is provided with positioning pins (11) for assisting in positioning the workpiece.

4. The pump cover bolt automatic tightening device according to claim 1, characterized in that: A linear guide rail (12) is arranged on the support frame (4) in a vertical direction, a first lifting block (13) and a second lifting block (14) are arranged on the linear guide rail (12), the first lifting block (13) and the second lifting block (14) slide on the linear guide rail (12), the first lifting block (13) is located above the second lifting block (14), the first lifting platform (5) is arranged on the first lifting block (13) and moves up and down with the first lifting block (13), and the second lifting platform (6) is arranged on the second lifting block (14) and moves up and down with the second lifting block (14); A second cylinder (15) is arranged on the top of the support frame (4), and a telescopic end of the second cylinder (15) is connected to the first lifting platform (5); The lower surface of the first lifting platform (5) is connected with a connecting rod (16), the lower end of the connecting rod (16) passes through the second lifting platform (6) and is lifted and lowered relative to the second lifting platform (6), and the lower end of the connecting rod (16) is located below the second lifting platform (6), and a limiting body is provided to prevent the connecting rod (16) from detaching upward from the second lifting platform (6). A rectangular coil spring (17) is sleeved on the connecting rod (16), and the rectangular coil spring (17) is compressed between the upper end of the connecting rod (16) and the second lifting platform (6); A buffer (18) is arranged on the supporting platform (4) and below the second lifting platform (6).

5. The automatic tightening device for pump cover bolts according to claim 4 is characterized in that: The tightening drive mechanism comprises an electric wrench (19), the output end of the electric wrench (19) is connected to a pneumatic rod (20), the pneumatic rod (20) passes through the first lifting platform (5) and extends downward, and the pneumatic rod (20) is rotatably connected to the first lifting platform (5) via a bearing.

6. The automatic tightening device for pump cover bolts according to claim 5, characterized in that: The tightening operation end comprises: The duckbill body (21) is a hollow structure with a vertical through hole. One side of the duckbill body (21) has a channel for the bolt to enter and a screw guide extending outward. An external fixed tube (22) connected to the upper end of the duckbill body (21), the upper end of the external fixed tube (22) being fixedly connected to the lower surface of the second lifting platform (6); A guide sleeve (23), the upper end of which is sleeved on the lower end of the duckbill body (21) and is connected to the vertical through hole of the duckbill body (21); a wrench (24), which is disposed in the vertical through hole of the duckbill body (21) and moves axially and rotates radially in the vertical through hole, and the wrench (24) is used to tighten the bolt; and The clamping claws (25) are arranged in two groups on both sides of the duckbill body (21).

7. The automatic tightening device for pump cover bolts according to claim 6, characterized in that: The middle part of the clamping claw (25) is hinged on the outside of the duckbill body (21), and the lower end part extends into the inside of the duckbill body (21). The lower ends of the two groups of clamping claws (25) extending into the inside of the duckbill body (21) form a positioning groove for a positioning bolt to straighten the bolt to a vertical state.

8. The automatic tightening device for pump cover bolts according to claim 6, characterized in that: The transmission mechanism comprises: a pneumatic extension rod (26) coaxially connected to the lower end of the pneumatic rod (20), the pneumatic extension rod (26) extending downward to below the second lifting platform (6) and coaxially connected to the upper end of the wrench (24); and An oil-free bushing (27), the oil-free bushing (27) is vertically arranged on the second lifting platform (6) and is connected to the external fixing tube (22), the pneumatic extension rod (26) is inserted into the oil-free bushing (27) to extend downward to the bottom of the second lifting platform (6), and the pneumatic extension rod (26) performs radial rotation and axial movement in the oil-free bushing (27).

9. The automatic tightening device for pump cover bolts according to claim 1, characterized in that: An operating panel (28) is provided on the front side of the aluminum profile protection frame (2).

10. The automatic tightening device for pump cover bolts according to any one of claims 1 to 9, characterized in that: The six groups of tightening operation ends are arranged in one-to-one correspondence with the positions of tightening bolts on the pump cover.

Images