Gear welding positioning fixture

Abstract

The present invention discloses a gear welding positioning fixture, which includes a workbench, the top of which is equipped with a second base plate along its length in a sliding guide, either end of which is fixedly connected to a connecting plate in the vertical direction, the top of which is movably connected to a first base plate, and the first and second base plates are both equipped with inner and outer clamping parts of the same specifications for clamping the gear workpiece, the outer and inner clamping parts are concentrically arranged and located on the periphery of the inner clamping part, and when the outer clamping part moves upward in the vertical direction relative to the inner clamping part, the gear workpiece can be separated from the inner clamping part and enter into the outer clamping part. The gear workpiece to be welded in the present invention can be mechanically transferred between two welding fixtures, and the clamping position can be switched according to the welding requirements of the gear workpiece, which can ensure that all areas on the gear workpiece can be welded and make the welding positioning fixture flexible and convenient to use.

Description

Technical Field

[0001] The invention relates to the technical field of gear welding, and in particular to a gear welding positioning fixture. Background Art

[0002] Gears require welding technology whether in the production and processing stage or when they are repaired. After searching, it was found that in the prior art, when welding and positioning gears, an annular pressure plate is usually installed on the positioning seat. The personnel put the gear on the positioning seat and press the gear with the annular pressure plate, or apply pressure to the outer ring or inner ring of the gear through at least two clamping blocks moving radially to achieve the clamping purpose. This clamping method can only meet the needs of local welding of gears. When there are many parts of the gear that need to be welded, the clamping blocks or pressure plates will cover the welding parts, so the gears need to be reinstalled and clamped so that the shielded parts of the gears can be welded. The gears need to be preheated before welding, and heat will also be generated during the welding process, which will increase the temperature of the gears. Reinstalling the positioning gears requires the help of external clamping equipment, which is more troublesome to operate. Moreover, after long-term use, gears may experience wear on the outer teeth, wear on the inner ring leading to gear eccentricity, or other wear conditions. When the outer teeth are worn, it is best to clamp the inner ring of the gear for welding repair. When the inner ring is severely worn, it is necessary to clamp the outer ring of the gear for welding repair. However, the welding positioning fixtures in the prior art are only applicable to a limited number of situations and cannot select an appropriate clamping solution based on the actual wear condition of the gear. In other words, the existing positioning fixtures cannot meet the requirements of gear welding in terms of flexibility. In view of this, the present invention proposes a gear welding positioning fixture. Summary of the Invention

[0003] In order to solve the technical problems existing in the above-mentioned prior art, the present invention provides a gear welding positioning fixture.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a gear welding positioning fixture, comprising a workbench, the top of the workbench is equipped with a second base plate in a sliding guide along its length direction, either end of the second base plate is fixedly connected to a connecting plate in a vertical direction, and the top of the connecting plate is movably connected to the first base plate, and the first base plate and the second base plate are both installed with inner clamping members and outer clamping members of the same specifications for clamping the gear workpiece, the outer clamping member and the inner clamping member are concentrically arranged and located on the periphery of the inner clamping member, wherein the outer clamping member can move axially relative to the inner clamping member to switch the clamping position of the gear workpiece, and when the outer clamping member moves upward in the vertical direction relative to the inner clamping member, the gear workpiece can be detached from the inner clamping member and enter into the outer clamping member; the inner clamping member or the outer clamping member on the first base plate removes the gear workpiece from the inner clamping member or the outer clamping member on the second base plate through a flipping movement and flips the bottom surface of the gear workpiece upward.

[0005] Preferably, the top of the workbench is integrally formed with two side panels along its width direction, and the two side panels are distributed on both sides of the second base plate, and the connecting plate is provided with a first limit slide groove in the vertical direction toward both sides of the side plate, and the bottom of the first base plate is fixedly connected with a limit block adapted for the first limit slide groove, and the limit block is embedded in the corresponding first limit slide groove to maintain a sliding connection with it; the first base plate is fixedly connected with a sleeve at a position near its bottom on both sides of the side plate, and the interior of the first base plate is formed with a receiving groove concentric with and connected to the sleeve along its width direction, and a sliding column is slidably installed in the interior of the receiving groove along its axial direction, and the sliding column can pass through the sleeve and extend to its outside; a follow-up slide groove and an arc limit groove are formed on the opposite side of the two side plates, wherein the sleeve portion extends into the arc limit groove and is slidably connected with it, and the angle of the arc limit groove is 90°. The cam is secured to the interior of the sliding plate and is adapted to engage the guide rails of the second base plate when the cam is engaged with the guide rails, and the cams are secured to the interior of the sliding plate when the cams are engaged.

[0006] Preferably, the two accommodating grooves extend along the thickness direction of the first substrate to communicate with the outside, and the outside of each sliding column is sleeved with a first connecting rod, and the first connecting rod extends along the thickness direction of the first substrate to its outside and is connected to the second connecting rod, and the two second connecting rods extend toward each other to the middle of the first substrate and are hinged to the first hinge rod and the second hinge rod respectively, and the first hinge rod and the second hinge rod are hingedly connected by an axle pin equipped with a torsion spring, and the torsion spring is used to drive the first hinge rod and the second hinge rod to rotate in a direction away from each other, and the interior of the first substrate is provided with an avoidance groove for the first hinge rod and the second hinge rod to rotate between the socket and the inner clamping member, and the socket and the avoidance groove are connected by a U-shaped groove, and the top of the limiting plug plate is fixedly connected to a pressure column adapted for the U-shaped groove, and the pressure column, the first hinge rod, the second hinge rod and the two second connecting rods and the first connecting rod form a linkage mechanism that drives the sliding column to slide along its axial direction.

[0007] Preferably, the second substrate is integrally formed with guide ribs on both sides facing the side panels, slide rails are set up on both sides of the workbench along its width direction, and the slide rails and the side panels form an integrated component, and a second limiting groove is opened along the length direction of the side facing the side panel and the slide rail, and the second substrate is embedded in the second limiting groove through the guide ribs and is connected to the side panel and the slide rail for sliding guidance.

[0008] Preferably, a rack is installed in the middle of the workbench along its length direction, and a driving gear meshing with the rack is drivenly connected to the edge of the second base plate on the side away from the connecting plate.

[0009] Preferably, the inner clamping member includes a supporting platform arranged on the first substrate or the second substrate, and the top of the supporting platform is concentrically fixedly connected to a guide platform with the same inner diameter as the gear workpiece; the outer clamping member includes a clamping ring adapted to the outer diameter of the gear workpiece, the inner ring of the clamping ring is connected to a support ring with a diameter smaller than the support ring but larger than the supporting platform, and several cylinders are distributed in a ring on the bottom of the clamping ring, and the piston end of the cylinder is supported on the second substrate.

[0010] Preferably, the supporting platform is rotatably connected to the second substrate, and several insertion rods are distributed in a ring on the inner side of the support ring. After the supporting platform and the guide platform form an integrated component, a cavity matching the number of insertion rods is opened inside the component. The cavity is arranged along the axial direction of the inner clamping piece, and the cavity extends along the radial direction of the inner clamping piece to communicate with the outside. Each insertion rod extends into the cavity along the radial direction of the inner clamping piece and is slidably connected thereto. The length of the insertion rod is the same as the radial length of the cavity along the inner clamping piece, and a roller is installed at the end of the piston of each cylinder.

[0011] Preferably, the bottom of the supporting platform extends through the second substrate to its bottom and is fixedly sleeved with a second sprocket. The bottom of the second substrate is also rotatably mounted with a first sprocket. A chain is sleeved between the first sprocket and the second sprocket. A second motor is installed on the top of the second substrate. The motor shaft of the second motor passes downward through the second substrate and is fixedly connected to the center of the first sprocket.

[0012] Compared with the prior art, the present invention provides a gear welding positioning fixture with the following beneficial effects:

[0013] (1) The welding positioning fixture proposed in the present invention has a total of two base plates, and the two base plates are respectively equipped with outer clamping parts and inner clamping parts of the same specifications. The gear workpiece can be fixed by the inner clamping parts or the outer clamping parts according to its wear area and clamping requirements. After the gear workpiece on the second base plate is welded, the first base plate can be moved to the top of the gear workpiece by flipping, and the gear workpiece can be directly grasped on the inner clamping part or the outer clamping part on the first base plate. Then, the first base plate can be rotated 180 degrees in the opposite direction and kept parallel to the second base plate. At this time, the bottom surface of the gear workpiece faces upward, and personnel can perform welding operations on the bottom surface of the gear workpiece, which can ensure that all areas on the gear workpiece can be welded. Moreover, when the gear workpiece is turned over, it is directly transferred from one positioning fixture to another positioning fixture, and there is no need for personnel to re-install and position the gear workpiece through external clamping equipment, thereby avoiding the trouble of personnel operation.

[0014] (2) When the gear workpiece switches the clamping position, it is first placed on the inner clamping part. When switching is required, the outer clamping part is driven upward to separate the gear workpiece from the inner clamping part and directly enter the outer clamping part. The switching is simple and convenient, and the inner clamping part and the outer clamping part can also keep rotating synchronously, which is convenient for personnel to perform welding operations on the gear workpiece, thereby improving the flexibility of the entire welding positioning fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 This is a schematic diagram of the first angle structure of the entire welding positioning fixture in the embodiment;

[0017] Figure 2 2. A schematic diagram of the second angle structure of the entire welding positioning fixture in the embodiment;

[0018] Figure 3 Schematic diagram of various structures on the connecting plate and the second substrate in the embodiment;

[0019] Figure 4 Schematic diagram of the structure of the bottom of the second substrate in the embodiment;

[0020] Figure 5 Schematic diagram of the installation of the inner clamping member on the second substrate in the embodiment;

[0021] Figure 6 Schematic diagram of the structure of the inner and outer clamping members in the embodiment;

[0022] Figure 7 It is a structural schematic diagram of the workbench in the embodiment;

[0023] Figure 8 Schematic diagram of the structure of the linkage mechanism on the first substrate in the embodiment;

[0024] Figure 9 Schematic diagram of the assembly of the pressure column and the avoidance groove on the first substrate in the embodiment;

[0025] Figure 10 Schematic diagram of the partial structure of the entire welding positioning fixture in the embodiment.

[0026] In the figure: 1, workbench; 2, side plate; 3, slide rail; 4, connecting plate; 5, first base plate; 6, rack; 7, second base plate; 8, gear workpiece; 9, limit support column; 10, driving gear; 11, inner clamping member; 111, bearing platform; 112, guide platform; 12, outer clamping member; 121, clamping ring; 122, support ring; 13, first limit slide groove; 14, guide rib; 15, first motor; 16, rotating plate; 17, limit plug plate; 18, pressure column; 19, first Second motor; 20. Rotating shaft; 21. First sprocket; 22. Second sprocket; 23. Chain; 24. Cavity; 25. Cylinder; 26. Roller; 27. Insert rod; 28. Second limiting groove; 29. ​​Follow-up slide; 30. Arc-shaped limiting groove; 31. Sleeve; 32. Sliding column; 33. First connecting rod; 34. Second connecting rod; 35. First hinged rod; 36. Second hinged rod; 37. Accommodating groove; 38. Socket; 39. Avoidance groove; 40. U-shaped groove; 41. Electromagnetic suction block. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0028] See also Figures 1 to 10 The present embodiment proposes a gear welding positioning fixture, comprising a workbench 1, a second base plate 7 is mounted on the top of the workbench 1 along its length direction, and a connecting plate 4 is fixedly connected to either end of the second base plate 7 along the vertical direction. The top of the connecting plate 4 is movably connected to the first base plate 5. In the initial state, the first base plate 5 is as shown in FIG. Figure 1In the state shown, an inner clamping member 11 and an outer clamping member 12 of the same specifications for clamping the gear workpiece 8 are installed on both the first substrate 5 and the second substrate 7. The outer clamping member 12 and the inner clamping member 11 are arranged concentrically and located on the periphery of the inner clamping member 11. The outer clamping member 12 is used to clamp the outer ring of the gear workpiece 8, and the inner clamping member 11 is used to clamp the inner ring of the gear workpiece 8. The outer clamping member 12 can move axially relative to the inner clamping member 11 to switch the clamping position of the gear workpiece 8. When the outer clamping member 12 moves upward in the vertical direction relative to the inner clamping member 11, the gear workpiece 8 can be disengaged from the inner clamping member 11 and entered into the outer clamping member 12. The inner clamping member 11 or outer clamping member 12 on the first substrate 5 clamps the gear workpiece 8 out of the inner clamping member 11 or outer clamping member 12 on the second substrate 7 through a flipping movement and flips the bottom surface of the gear workpiece 8 upward.

[0029] When the above scheme is implemented, the gear workpiece 8 to be welded is first placed on the second substrate 7, and the inner clamping member 11 or the outer clamping member 12 is selected to clamp and fix the gear workpiece 8 according to the wear condition of the gear workpiece 8. Since the position where the inner clamping member 11 or the outer clamping member 12 clamps the gear workpiece 8 and the bottom surface of the gear workpiece 8 are blocked, welding cannot be implemented in this area of ​​the gear workpiece 8, so the gear workpiece 8 needs to be turned over. When turning over, the first substrate 5 is flipped relative to the connecting plate 4 until it is flipped to the top of the gear workpiece 8. It should be noted that the inner clamping member 11 and the outer clamping member 12 in this application both use electromagnetic adsorption to fix the gear workpiece 8. When the gear workpiece 8 is placed on the second substrate 7 for welding, the inner clamping member 11 and the outer clamping member 12 on the second substrate 7 are in working condition. After the first substrate 5 is flipped to the top of the gear workpiece 8, the inner clamping member 11 on the first substrate 5 is also nested. Inside the gear workpiece 8, the inner clamping piece 11 on the first substrate 5 works to generate magnetic force, while the inner clamping piece 11 on the second substrate 7 loses power and loses magnetic force. The inner clamping piece 11 on the first substrate 5 adsorbs the gear workpiece 8, and then the gear workpiece 8 can be grabbed from the second substrate 7 by rotating the first substrate 5 in the opposite direction. At this time, the second substrate 7 is driven by external force to slide along the length direction of the workbench 1, thereby driving the first substrate 5 to continue to flip until the first substrate 5 is flipped to be parallel to the second substrate 7. At this time, the bottom surface of the gear workpiece 8 is facing up, and personnel can perform welding operations on the area blocked by the gear workpiece 8. The gear workpiece 8 is flipped in the above manner to ensure that all areas on it can be welded, and when the gear workpiece 8 is turned over, it is directly transferred from one positioning fixture to another positioning fixture. There is no need for personnel to re-install and position the gear workpiece 8 through external clamping equipment, thereby avoiding the trouble of personnel operation.

[0030] like Figure 3As shown, the top of the workbench 1 is integrally formed with two side panels 2 along its width direction. The two side panels 2 are distributed on both sides of the second base plate 7. The connecting plate 4 is provided with first limiting grooves 13 along the vertical direction toward both sides of the side panels 2. The bottom of the first base plate 5 is fixedly connected with a limiting block adapted to the first limiting groove 13, and the limiting block is embedded in the corresponding first limiting groove 13 to maintain a sliding connection therewith. When the first base plate 5 is rotated to a certain tilt angle relative to the connecting plate 4, the first base plate 5 can slide along the height direction of the connecting plate 4 through the limiting block and the first limiting groove 13. Figure 8 and Figure 9 As shown, the first base plate 5 is fixedly connected to the sleeve 31 at the position near the bottom of the two sides of the side plate 2. The interior of the first base plate 5 is formed with a receiving groove 37 along its width direction, which is concentric with and connected to the sleeve 31. The interior of the receiving groove 37 is slidably installed with a sliding post 32 along its axial direction. The sliding post 32 can pass through the sleeve 31 and extend to the outside. Figure 10 As shown, a follower groove 29 and an arc-shaped limit groove 30 are formed on the opposite side of the two side plates 2, wherein the sleeve 31 partially extends into the arc-shaped limit groove 30 and is slidably connected thereto, the angle of the arc-shaped limit groove 30 is 90°, the follower groove 29 is obliquely distributed along the sliding direction of the second base plate 7, and the groove depth of the follower groove 29 is greater than the arc-shaped limit groove 30, and the sleeve 31 passes through the sliding column 32 and can extend into the follower groove 29 and be slidably connected thereto.

[0031] like Figure 4 and Figure 8 、 Figure 9 As shown, the connecting plate 4 is rotatably installed with a rotating shaft 20 on one side of the inner clamping member 11, and a rotating plate 16 is sleeved on the outside of the rotating shaft 20. The rotating plate 16 is driven to rotate by the first motor 15. The middle part of the rotating plate 16 is integrally formed with a limiting plug plate 17 on one side of the first substrate 5. A socket 38 corresponding to the rotation path of the limiting plug plate 17 is provided on the end surface of the first substrate 5. When the rotating plate 16 rotates counterclockwise to a vertical state, the limiting plug plate 17 can be inserted into the socket 38. Electromagnetic suction blocks 41 are installed on both sides of the limiting plug plate 17. When the first substrate 5 is flipped, the first motor 15 drives the rotating plate 16 to rotate counterclockwise. The first base plate 5 is rotated to the right of the gear workpiece 8, and the bottom of the first base plate 5 is supported by the two limit support columns 9 on the second base plate 7. During the clockwise flipping of the first base plate 5, the sleeves 31 on both sides thereof always slide in the arc-shaped limit groove 30.

[0032] When the gear workpiece 8 is transferred from the second substrate 7 to the first substrate 5, the first substrate 5 needs to be flipped 180° in the opposite direction so that the bottom surface of the gear workpiece 8 faces upward. Therefore, after the inner clamping member 11 or the outer clamping member 12 on the first substrate 5 clamps the gear workpiece 8, the first motor 15 is started to drive the rotating plate 16 and the first substrate 5 to rotate 90° counterclockwise to return to the initial position, and the electromagnetic suction block 41 stops working. Then the first motor 15 drives the rotating plate 16 to rotate clockwise by a certain angle, so that the limit plug 17 rotates out of the socket 38. When the limit plug 17 slips out of the socket 38, the linkage mechanism drives the sliding column 32 to extend into the follower slide 29. At this time, the entire first substrate 5 has a tendency to slide downward relative to the connecting plate 4 under the action of its own gravity. However, it is stopped by the arc-shaped limit groove 30 and the follower slide 29. At this time, the second substrate 7 is driven to slide on the workbench 1. While the first substrate 5 and the second substrate 7 slide forward, the follower slide 29 The following slide 29 is used to move downward along the height direction of the connecting plate 4. Since the depth of the following slide 29 is greater than the arc-shaped limiting groove 30, and the sliding column 32 extends in the following slide 29, when the sleeve 31 and the sliding column 32 slide along the following slide 29 to the intersection of the following slide 29 and the arc-shaped limiting groove 30, the two will not separate from the following slide 29 and enter the arc-shaped limiting groove 30, but will always slide downward along the following slide 29. As the first base plate 5 and the second base plate 7 slide forward, The limit blocks on both sides of the first substrate 5 slide in the first limit slots 13 on both sides of the connecting plate 4. When the limit blocks slide to the bottom of the first limit slots 13, the first substrate 5 and the second substrate 7 continue to slide. Then, the first substrate 5 will rotate relative to the connecting plate 4 under the action of the follow-up slots 29 until the sliding columns 32 on both sides of the first substrate 5 slide to the bottom of the follow-up slots 29. At this time, the entire first substrate 5 rotates to be parallel to the second substrate 7, and the bottom surface of the entire gear workpiece 8 will eventually face upward.

[0033] On the basis of the above scheme, the two receiving grooves 37 in this example are extended along the thickness direction of the first substrate 5 to communicate with the outside, and the outside of each sliding column 32 is sleeved with a first connecting rod 33, which is extended along the thickness direction of the first substrate 5 to its outside and then connected to the second connecting rod 34. The two second connecting rods 34 extend toward each other to the middle of the first substrate 5 and are respectively hinged to a first hinge rod 35 and a second hinge rod 36. The first hinge rod 35 and the second hinge rod 36 are hingedly connected by a shaft pin equipped with a torsion spring, and the torsion spring is used to drive the first hinge rod 3 5 and the second hinged rod 36 rotate in a direction away from each other. An avoidance groove 39 is provided inside the first base plate 5 between the socket 38 and the inner clamping member 11 for the first hinged rod 35 and the second hinged rod 36 to rotate. The socket 38 and the avoidance groove 39 are connected by a U-shaped groove 40. The top of the limiting plug plate 17 is fixedly connected to a pressure column 18 adapted to the U-shaped groove 40. The pressure column 18, the first hinged rod 35, the second hinged rod 36 and the two second connecting rods 34 and the first connecting rod 33 form a linkage mechanism that drives the sliding column 32 to slide along its axial direction. When the rotating plate 16 rotates counterclockwise, the limiting plug plate 17 enters the socket 38, the pressure column 18 moves in the direction of the U-shaped groove 40, and applies a force to the first hinge rod 35 and the second hinge rod 36, so that the first hinge rod 35 and the second hinge rod 36 rotate toward each other, thereby driving the two second connecting rods 34 to move toward each other, and the two sliding columns 32 disengage from the follower slide groove 29. When the limiting plug plate 17 enters the socket 38, the pressure column 18 also enters the U-shaped groove 40, and the first hinge rod 35 and the second hinge rod 36 move toward the first base plate 5 during rotation, and the avoidance groove 39 provided can prevent the first base plate 5 from affecting the rotation of the first hinge rod 35 and the second hinge rod 36. When the limiting plug plate 17 disengages from the socket 38, the first hinge rod 35 and the second hinge rod 36 return to their original positions under the action of the torsion spring, thereby causing the two sliding columns 32 to re-extend into the follower slide groove 29.

[0034] like Figure 3 As shown, the second base plate 7 is integrally formed with guide ribs 14 on both sides of the side plate 2, and the workbench 1 is provided with slide rails 3 on both sides along its width direction, and the slide rails 3 and the side plate 2 form an integral component, as shown in FIG. Figure 7 As shown, a second limiting groove 28 is provided along the length direction of the side panel 2 and the slide rail 3 facing each other, and the second base plate 7 is embedded in the second limiting groove 28 through the guide rib 14 and is slidably guided and connected to the side panel 2 and the slide rail 3.

[0035] like Figure 2As shown, a rack 6 is installed in the middle of the workbench 1 along its length direction, and a driving gear 10 meshing with the rack 6 is driven and connected to the edge of the second base plate 7 on the side away from the connecting plate 4. In this application, the movement of the second base plate 7 along the length direction of the workbench 1 is achieved by the cooperation of the rack 6 and the driving gear 10. The driving gear 10 is driven to rotate by a power device, and the driving gear 10 meshes with the rack 6 while rotating, thereby driving the second base plate 7 to move linearly along the workbench 1.

[0036] like Figure 5 As shown, the inner clamping member 11 in the present application includes a carrier 111 provided on the first substrate 5 or the second substrate 7. The top of the carrier 111 is concentrically fixedly connected to a guide platform 112 having the same inner diameter as the gear workpiece 8. The guide platform 112 can generate electromagnetic attraction through the controller. When the gear workpiece 8 is placed on the carrier 111, the guide platform 112 is nested into the inner ring of the gear workpiece 8 and the gear workpiece 8 is firmly adsorbed and fixed on the inner clamping member 11 through electromagnetic attraction. The outer clamping member 12 is as shown in FIG. Figure 6 As shown, it includes a clamping ring 121 that is adapted to the outer diameter of the gear workpiece 8. The inner ring of the clamping ring 121 is connected to a support ring 122 whose diameter is smaller than the support ring 122 but larger than the carrier platform 111. Several cylinders 25 are distributed in a ring around the bottom of the clamping ring 121. The piston end of the cylinder 25 is supported on the second base plate 7. When the outer ring of the gear workpiece 8 needs to be clamped, the cylinder 25 is started, and the piston rod of the cylinder 25 is extended to drive the outer clamping part 12 to move upward in the vertical direction. During the upward movement of the outer clamping part 12, the support ring 122 is nested in the outer ring of the gear workpiece 8, and the bottom of the gear workpiece 8 is supported on the support ring 122 and detached from the inner clamping part 11 under the action of the support ring 122. The clamping ring 121 in the outer clamping part 12 can generate electromagnetic attraction through control.

[0037] As a preferred embodiment, the carrier 111 in this example is rotatably connected to the second substrate 7, which can rotate the gear workpiece 8 to facilitate welding operations. Figure 4As shown, the bottom of the supporting platform 111 in the present application extends through the second substrate 7 to its bottom and is fixedly sleeved with a second sprocket 22. The bottom of the second substrate 7 is also rotatably installed with a first sprocket 21. The diameter ratio of the first sprocket 21 and the second sprocket 22 is 1:4. A chain 23 is sleeved between the first sprocket 21 and the second sprocket 22. A second motor 19 is installed on the top of the second substrate 7. The motor shaft of the second motor 19 passes downward through the second substrate 7 and is fixedly connected to the center of the first sprocket 21. The first sprocket 21 is driven to rotate by the second motor 19, and the first sprocket 21 drives the second sprocket 22 to rotate through the chain 23. Since the diameter ratio of the first sprocket 21 and the second sprocket 22 is 1:4, the high-speed rotating first sprocket 21 can be converted into the low-speed rotation of the second sprocket 22. The supporting platform 111 and the second sprocket 22 keep rotating synchronously, thereby realizing the rotation of the inner clamping member 11 and the outer clamping member 12.

[0038] In order to ensure that the outer clamping member 12 can also rotate, Figure 6 As shown, in this example, a plurality of inserting rods 27 are distributed in a circular manner on the inner side of the support ring 122. After the supporting platform 111 and the guide platform 112 form an integrated component, cavities 24 are opened inside the supporting ring 122 to match the number of the inserting rods 27. Figure 5 As shown, the cavity 24 is arranged along the axial direction of the inner clamping part 11, and the cavity 24 extends radially along the inner clamping part 11 to communicate with the outside, and each insertion rod 27 extends radially along the inner clamping part 11 into the cavity 24 and is slidably connected thereto. When the inner clamping part 11 rotates, the outer clamping part 12 can be driven to rotate together by the insertion rod 27. In order to ensure that the outer clamping part 12 can always remain concentric with the inner clamping part 11, in this example, the length of the insertion rod 27 is set to be the same as the radial length of the cavity 24 along the inner clamping part 11, so that the outer clamping part 12 can be fixed on its periphery relative to the inner clamping part 11. When the cylinder 25 drives the outer clamping part 12 to move in the vertical direction, the insertion rod 27 slides in the vertical direction inside the cavity 24, and a roller 26 is installed at the end of the piston of each cylinder 25. The outer clamping part 12 is rollingly connected to the second substrate 7 through the roller 26, which can reduce the friction between the outer clamping part 12 and the second substrate 7. In addition, since the outer clamping part 12 is in upward movement, when the support ring 122 just contacts the bottom of the gear workpiece 8, the support ring 122 and the supporting platform 111 are at the same height. When the outer clamping part 12 continues to move upward a distance d1 of the height of the guide platform 112, the gear workpiece 8 can be detached from the inner clamping part 11, and after the outer clamping part 12 moves upward a distance d1, the insertion rod 27 on the inner side of the support ring 122 can still be maintained in the cavity 24. Therefore, the insertion rod 27 is as close to its bottom as possible on the inner ring of the support ring 122. In this way, after the gear workpiece 8 is transferred to the outer clamping part 12, it can retain a certain space with the inner clamping part 11, which is convenient for personnel to weld the area on the inner side of the gear workpiece 8 that is blocked by the inner clamping part 11.

[0039] In the description of the present invention, the terms "first," "second," "another," and "yet another" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0040] In the description of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, it can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0041] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and alterations may be made to the embodiments without departing from the spirit and scope of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A gear welding positioning fixture, comprising a workbench (1), characterized in that: The top of the workbench (1) is provided with a second base plate (7) along its longitudinal direction, and either end of the second base plate (7) is fixedly connected to a connecting plate (4) in a vertical direction. The top of the connecting plate (4) is movably connected to the first base plate (5). The first base plate (5) and the second base plate (7) are both provided with an inner clamping member (11) and an outer clamping member (12) of the same specification for clamping the gear workpiece (8). The outer clamping member (12) and the inner clamping member (11) are concentrically arranged and located on the periphery of the inner clamping member (11). The outer clamping member (12) can be relatively fixed to the inner clamping member (11). The inner clamping member (11) moves along its axial direction to switch the clamping position of the gear workpiece (8), and when the outer clamping member (12) moves upward in the vertical direction relative to the inner clamping member (11), the gear workpiece (8) can be separated from the inner clamping member (11) and enter the outer clamping member (12); the inner clamping member (11) or the outer clamping member (12) on the first substrate (5) clamps the gear workpiece (8) out of the inner clamping member (11) or the outer clamping member (12) on the second substrate (7) through a flipping movement and flips the bottom surface of the gear workpiece (8) upward; The top of the workbench (1) is integrally formed with two side panels (2) along its width direction, and the two side panels (2) are distributed on both sides of the second base plate (7). The connecting plate (4) is provided with a first limiting slide groove (13) in the vertical direction on both sides of the side panels (2). The bottom of the first base plate (5) is fixedly connected with a limiting block adapted to the first limiting slide groove (13), and the limiting block is embedded in the corresponding first limiting slide groove (13) to maintain a sliding connection therewith; the first base plate (5) is fixedly connected with a sleeve (31) at a position near the bottom of the first base plate (5) on both sides of the side panels (2). The inside of the plate (5) is formed with a receiving groove (37) along its width direction, which is concentric with and connected to the sleeve (31). A sliding column (32) is installed in the inside of the receiving groove (37) along its axial direction. The sliding column (32) can pass through the sleeve (31) and extend to the outside thereof; the two side plates (2) are formed with a follower slide groove (29) and an arc-shaped limit groove (30) on the side facing each other, wherein the sleeve (31) partially extends into the arc-shaped limit groove (30) and is slidably connected thereto. The angle of the arc-shaped limit groove (30) is 90°, and the follower slide groove (29) is 90° along the sliding direction of the second base plate (7). The connecting plate (4) is rotatably mounted on a side of the inner clamping member (11) and a rotating plate (16) is sleeved on the outside of the rotating plate (20). The middle part of the rotating plate (16) is integrally formed with a limiting plug plate (17) on the side facing the first substrate (5). A socket adapted to the limiting plug plate (17) is provided on the end surface of the first substrate (5) on the rotation path of the limiting plug plate (17). (38), when the rotating plate (16) rotates counterclockwise to a vertical state, the limiting plug plate (17) can be inserted into the socket (38), and electromagnetic suction blocks (41) are installed on both sides of the limiting plug plate (17); when the limiting plug plate (17) is rotated and inserted into the socket (38) by the rotating plate (16), the sliding column (32) is driven by the linkage mechanism to disengage from the follower slide groove (29) and retract into the sleeve (31); when the limiting plug plate (17) slips off from the socket (38), the sliding column (32) is driven by the linkage mechanism to pass through the sleeve (31) and extend into the follower slide groove (29).

2. The gear welding positioning fixture according to claim 1, characterized in that: The two receiving grooves (37) are extended along the thickness direction of the first substrate (5) to communicate with the outside, and the outside of each sliding column (32) is sleeved with a first connecting rod (33), and the first connecting rod (33) is extended along the thickness direction of the first substrate (5) to the outside thereof and is connected to the second connecting rod (34), and the two second connecting rods (34) are extended toward each other to the middle of the first substrate (5) and are respectively hinged to a first hinge rod (35) and a second hinge rod (36), and the first hinge rod (35) and the second hinge rod (36) are hingedly connected by a shaft pin equipped with a torsion spring, and the torsion spring is used to drive the first hinge rod (35) and the second hinge rod (36) toward When the first hinge rod (35) and the second hinge rod (36) rotate in a direction away from each other, an escape groove (39) is provided between the socket (38) and the inner clamping member (11) inside the first base plate (5), and the socket (38) and the escape groove (39) are connected by a U-shaped groove (40) provided therebetween. A pressure column (18) adapted to the U-shaped groove (40) is fixedly connected to the top of the limiting plug plate (17). The pressure column (18), the first hinge rod (35), the second hinge rod (36), the two second connecting rods (34), and the first connecting rod (33) form a linkage mechanism for driving the sliding column (32) to slide along its axial direction.

3. The gear welding positioning fixture according to claim 1, characterized in that: The second base plate (7) is integrally formed with guide ribs (14) on both sides facing the side plate (2); the workbench (1) is provided with slide rails (3) on both sides along the width direction thereof, and the slide rails (3) and the side plate (2) form an integral component; a second limiting groove (28) is provided on the side facing the side plate (2) and the slide rail (3) along the length direction thereof; the second base plate (7) is embedded in the second limiting groove (28) through the guide ribs (14) and is connected to the side plate (2) and the slide rail (3) in a sliding and guiding manner.

4. The gear welding positioning fixture according to claim 3, characterized in that: A rack (6) is installed in the middle of the workbench (1) along its length direction, and a driving gear (10) meshing with the rack (6) is drivingly connected to the edge of the second base plate (7) on the side away from the connecting plate (4).

5. The gear welding positioning fixture according to claim 1, characterized in that: The inner clamping member (11) includes a supporting platform (111) arranged on the first substrate (5) or the second substrate (7), and the top of the supporting platform (111) is concentrically fixedly connected to a guide platform (112) having the same inner diameter as the gear workpiece (8); the outer clamping member (12) includes a clamping ring (121) adapted to the outer diameter of the gear workpiece (8), the inner ring of the clamping ring (121) is connected to a support ring (122) having a diameter smaller than the clamping ring (121) but larger than the supporting platform (111), and a plurality of cylinders (25) are distributed in an annular manner on the bottom of the clamping ring (121), and the piston ends of the cylinders (25) are supported on the second substrate (7) or the first substrate (5).

6. The gear welding positioning fixture according to claim 5, characterized in that: The supporting platform (111) is rotatably connected to the second substrate (7) or the first substrate (5), and a plurality of plug rods (27) are distributed in an annular manner on the inner side of the support ring (122). After the supporting platform (111) and the guide platform (112) form an integrated component, a cavity (24) matching the number of the plug rods (27) is opened inside the supporting platform (111). The cavity (24) is arranged along the axial direction of the inner clamping member (11), and the cavity (24) extends along the radial direction of the inner clamping member (11) to communicate with the outside. Each plug rod (27) extends along the radial direction of the inner clamping member (11) into the cavity (24) and is slidably connected thereto. The length of the plug rod (27) is the same as the radial length of the cavity (24) along the inner clamping member (11). A roller (26) is installed at the end of the piston of each cylinder (25).

7. The gear welding positioning fixture according to claim 6, characterized in that: The bottom of the carrier platform (111) passes through the second substrate (7) or the first substrate (5) and extends to the bottom thereof, whereupon a second sprocket (22) is fixedly sleeved thereon; a first sprocket (21) is also rotatably mounted on the bottom of the second substrate (7) or the first substrate (5); a chain (23) is sleeved between the first sprocket (21) and the second sprocket (22); a second motor (19) is mounted on the top of the second substrate (7) or the first substrate (5); a motor shaft of the second motor (19) passes downward through the second substrate (7) or the first substrate (5) and is fixedly connected to the center of the first sprocket (21).

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