Floating mandrel clamp

Abstract

The utility model relates to the technical field of automatic machining, in particular to a floating mandrel clamp. According to the floating clamping device for the half axle gear, after the half axle gear is positioned through the positioning tooth die, the pull rod assembly drives the expansion sleeve and the expansion block to move relatively, the expansion sleeve clamps the half axle gear on the expansion sleeve after expanding, and therefore floating clamping of the half axle gear is completed; the outer circle and the end face of the half axle gear can be machined, jumping of the outer circle after machining is guaranteed, and the precision is higher; compared with a traditional fixed type, the position can be adjusted in a floating mode, and a workpiece can be clamped more stably and reliably.

Description

Technical Field

[0001] The utility model relates to the technical field of automated processing, and relates to a floating mandrel clamp. Background Art

[0002] The half-axle gear is an important part in the automobile differential. The structural feature of this part is that one side is a bevel gear with an axial through hole in the middle. The net weight of this part is less than 300 grams. Due to the small size and complex structure of the automobile half-axle gear, and the lack of necessary clamping reference, the metal cutting processing is difficult, the processing efficiency is low, and the processing quality is unstable. The existing technology uses a tooth mold clamp to match the half-axle gear to mesh and position, to process the outer circle of the half-axle gear, and then process the end face of the half-axle gear after the outer circle processing is completed. The half-axle gear needs two circulation clamping to complete the processing of its end face and outer circle. Not only is the processing efficiency low, but the positioning reference is not unified after multiple circulation clamping. It is difficult to achieve the design requirements for processing accuracy, making it difficult to control the processing quality. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a floating mandrel fixture which can process the outer circle and end face of a half-axle gear, ensure the runout of the outer circle after processing, have higher precision and can float and adjust the position.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model to solve its technical problems is:

[0005] A floating mandrel fixture, comprising:

[0006] ontology;

[0007] A positioning tooth die is arranged on the processing end of the body, and the positioning tooth die is used to position the half-shaft gear;

[0008] A clamping assembly is arranged on the processing end of the body, and the clamping assembly includes an expansion sleeve and a tightening block. The tightening block is arranged on the body, the expansion sleeve is sleeved on the tightening block, and the expansion sleeve is passed through the half-shaft gear;

[0009] The pull rod assembly is arranged on the main body, the clamping assembly is drivingly connected to the pull rod assembly, and the pull rod assembly drives the expansion sleeve and the tensioning block to move relative to each other so as to clamp the half-axle gear on the expansion sleeve.

[0010] In one embodiment of the utility model, a mounting seat is provided on the main body, a mounting groove matching the positioning tooth mold is provided on the mounting seat, a plurality of threaded holes are evenly provided on the side wall of the mounting groove, bolts are provided on the threaded holes, and the ends of the bolts abut against the outer side surfaces of the positioning tooth mold.

[0011] In one embodiment of the utility model, the tensioning block includes a fixed block and a pressure ring, a mounting platform is provided on the main body, the fixed block is fixedly connected to the mounting platform via the pressure ring, a tensioning rod is provided on the fixed block, and the tensioning rod is passed through the tensioning hole of the expansion sleeve.

[0012] In one embodiment of the utility model, the tensioning rod has a conical structure, the outer wall of the tensioning rod is provided with a tensioning slope, the inner side surface of the tensioning hole is provided with a guide slope matching the tensioning slope, the tensioning slope is connected to the guide slope, and the taper of the tensioning hole is greater than the taper of the tensioning rod.

[0013] In one embodiment of the utility model, the clamping assembly also includes a rivet rod, which is passed through the expansion sleeve. The tension block and the main body are provided with guide holes. The rivet rod passes through the guide hole and is connected to the pull rod assembly. The pull rod assembly drives the rivet rod to drive the expansion sleeve to move on the tension block to clamp the half-shaft gear.

[0014] In one embodiment of the utility model, the rivet rod includes a rod body and a support plate, a pressure plate is provided on one end of the rod body, a rotating hole is provided on the pressure plate, the support plate is provided on the rod body, and the support plate and the pressure plate are arranged opposite to each other, a support ring groove is provided between the support plate and the pressure plate, the expansion sleeve is clamped on the support ring groove, and a threaded surface is provided on the other end of the rod body.

[0015] In one embodiment of the utility model, the pull rod assembly includes a pull rod, a piston rod is arranged on the pull rod, a movable hole is opened on the main body, the piston rod is passed through the movable hole, an end cover is arranged on the movable hole, and the pull rod is passed through the guide hole of the end cover, so that the piston rod cannot be detached from the movable hole.

[0016] In an embodiment of the present utility model, the depth of the movable hole is the same as the thickness of the piston rod, and a movable groove is provided on the end cover, and the piston rod is slidably arranged on the movable groove.

[0017] In one embodiment of the utility model, the positioning tooth mold includes a positioning cylinder, the positioning cylinder is fixedly connected to the body by a fixing bolt, the positioning cylinder is sleeved on the clamping assembly, and a limiting tooth is arranged on the edge of the positioning cylinder.

[0018] In an embodiment of the utility model, a guide rod is provided on the movable hole, a guide hole matching the guide rod is provided on the piston rod, and the guide rod is inserted into the guide hole.

[0019] Beneficial effects of the utility model:

[0020] After the utility model positions the half-shaft gear by means of the positioning tooth die, the pull rod assembly drives the expansion sleeve and the tensioning block to move relative to each other, and the expansion sleeve is expanded to clamp the half-shaft gear thereon, thereby completing the floating clamping of the half-shaft gear. The positioning tooth die and the floating expansion sleeve are used to clamp the workpiece, and the outer circle and end face of the half-shaft gear can be processed, thereby ensuring the runout of the outer circle after processing and having higher precision. Compared with the traditional fixed type, the position can be adjusted in a floating manner, and the workpiece can be clamped more stably and reliably. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of a floating mandrel fixture of the utility model.

[0022] Figure 2 It is a three-dimensional schematic diagram of the utility model.

[0023] Explanation of the numbers in the figure: 1. Main body; 11. Limiting groove; 12. Connecting flange; 2. Mounting seat; 21. Bolt; 22. Positioning tooth die; 23. Limiting tooth; 3. Axle gear; 4. Expansion sleeve; 41. Tightening hole; 42. Tensioning rod; 43. Fixing block; 44. Pressing ring; 5. Pull rod; 51. Piston rod; 52. Movable hole; 53. End cover; 54. Movable groove; 55. Guide rod; 6. Pull pin rod; 61. Pressure plate; 62. Support plate. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0025] Reference Figure 1-2 As shown, a floating mandrel fixture comprises:

[0026] A body 1 is provided with a limiting groove 11, and a connecting flange 12 is provided on the limiting groove 11;

[0027] A positioning tooth mold 22 is provided on the processing end of the body 1, and the positioning tooth mold 22 is used to position the side gear 3;

[0028] A clamping assembly is arranged on the processing end of the body 1, and the clamping assembly includes an expansion sleeve 4 and a tightening block. The tightening block is arranged on the body 1, the expansion sleeve 4 is sleeved on the tightening block, and the expansion sleeve 4 is inserted on the half-shaft gear 3;

[0029] The pull rod 5 assembly is arranged on the main body 1 , and the clamping assembly is drivingly connected to the pull rod 5 assembly. The pull rod 5 assembly drives the expansion sleeve 4 and the tensioning block to move relative to each other so as to clamp the half-shaft gear 3 on the expansion sleeve 4 .

[0030] After the utility model positions the half-shaft gear 3 by the positioning tooth die 22, the pull rod 5 assembly drives the expansion sleeve 4 and the tensioning block to move relative to each other. After the expansion sleeve 4 expands, it clamps the half-shaft gear 3 thereon, thereby completing the floating clamping of the half-shaft gear 3. The positioning tooth die 22 and the floating expansion sleeve 4 are used to clamp the workpiece, and the outer circle and end face of the half-shaft gear 3 can be processed, which ensures the runout of the outer circle after processing and has higher precision. Compared with the traditional fixed type, the position can be adjusted in a floating manner, and the workpiece can be clamped more stably and reliably.

[0031] In one embodiment of the utility model, a mounting seat 2 is provided on the main body 1, and a mounting groove matching the positioning tooth mold 22 is provided on the mounting seat 2. A plurality of threaded holes are evenly provided on the side wall of the mounting groove, and bolts 21 are provided on the threaded holes. The end of the bolt 21 abuts against the outer side surface of the positioning tooth mold 22.

[0032] Specifically, tightening the bolt 21 so that the end of the bolt 21 is pressed against the outer side surface of the positioning tooth mold 22 can effectively realize the rapid positioning of the positioning tooth mold 22, and has the technical advantages of simple structure and reliable operation.

[0033] In one embodiment of the utility model, the tensioning block includes a fixing block 43 and a pressure ring 44, a mounting platform is provided on the main body 1, the fixing block 43 is fixedly connected to the mounting platform through the pressure ring 44, a tensioning rod 42 is provided on the fixing block 43, and the tensioning rod 42 is passed through the tensioning hole 41 of the expansion sleeve 4.

[0034] In one embodiment of the utility model, the tensioning rod 42 has a conical structure, the outer wall of the tensioning rod 42 is provided with a tensioning slope, the inner side surface of the tensioning hole 41 is provided with a guide slope matching the tensioning slope, the tensioning slope is connected to the guide slope, and the taper of the tensioning hole 41 is greater than the taper of the tensioning rod 42.

[0035] Specifically, the taper of the tightening hole 41 is greater than or equal to the taper of the tensioning rod 42, so that the tensioning rod 42 can fully tighten the expansion sleeve 4, ensuring high positioning accuracy, large and firm effective expansion, and ensuring the connection stability between the half-shaft gear 3 and the expansion sleeve 4.

[0036] In one embodiment of the utility model, the clamping assembly also includes a rivet rod 6, which is passed through the expansion sleeve 4. The tensioning block and the main body 1 are provided with guide holes. The rivet rod 6 passes through the guide holes and is connected to the pull rod 5 assembly. The pull rod 5 assembly drives the rivet rod 6 to drive the expansion sleeve 4 to move on the tensioning block to clamp the half-shaft gear 3.

[0037] Specifically, the expansion sleeve 4 is inserted into the through hole of the half-shaft gear 3, and the processing equipment pulls the pull rod 5 to mobilize the pull pin rod 6 to move toward the tensioning rod 42, so that the tensioning bevel is connected to the guide bevel. After the expansion sleeve 4 expands, it clamps the half-shaft gear 3 thereon, thereby completing the floating clamping of the half-shaft gear 3, ensuring the runout of the outer circle after processing, and having higher precision.

[0038] In one embodiment of the utility model, the rivet rod 6 includes a rod body and a support plate 62, a pressure plate 61 is provided on one end of the rod body, a rotating hole is provided on the pressure plate 61, the support plate 62 is provided on the rod body, and the support plate 62 is arranged opposite to the pressure plate 61, a support ring groove is provided between the support plate 62 and the pressure plate 61, the setting of the support ring groove can make the expansion sleeve 4 float on the through hole of the half-shaft gear 3, clamp the half-shaft gear 3 in the optimal position, the expansion sleeve 4 is clamped on the support ring groove, and the other end of the rod body is provided with a threaded surface.

[0039] Specifically, after the processing is completed, the processing equipment pushes the pull rod 5 to mobilize the rivet rod 6 to move in the direction away from the tensioning rod 42. The support plate 62 on the rod body pushes the expansion sleeve 4 and the tensioning rod 42 away, so that the half-shaft gear 3 is disengaged from the expansion sleeve 4. The support plate 62 can facilitate the rapid separation of the expansion sleeve 4 and the tensioning rod 42. The rotating hole can be a hexagonal hole or the like for bolts 21, so that the threaded surface of the rivet rod 6 can be screwed together with the threaded hole of the piston rod 51 using a bolt wrench 21.

[0040] In one embodiment of the utility model, the pull rod 5 assembly includes a pull rod 5, a piston rod 51 is provided on the pull rod 5, a movable hole 52 is opened on the main body 1, the piston rod 51 is passed through the movable hole 52, an end cover 53 is provided on the movable hole 52, and the pull rod 5 is passed through the guide hole of the end cover 53, so that the piston rod 51 cannot be detached from the movable hole 52.

[0041] Specifically, the processing equipment pulls the pull rod 5 to move the pull nail rod 6 toward the tensioning rod 42, so as to quickly clamp the half-shaft gear 3 on the expansion sleeve 4, which can improve the coaxiality accuracy of the workpiece half-shaft gear 3 and facilitate automated production.

[0042] In an embodiment of the present invention, the depth of the movable hole 52 is the same as the thickness of the piston rod 51 , and a movable groove 54 is formed on the end cover 53 , and the piston rod 51 is slidably disposed on the movable groove 54 .

[0043] Specifically, the piston rod 51 reciprocates in the space between the movable groove 54 and the movable space. By replacing the end cover 53 of different specifications, the depth of the movable groove 54 is changed, thereby quickly changing the maximum stroke of the piston rod 51. The structure is simple, the positioning is accurate, and the effect is good.

[0044] In one embodiment of the utility model, the positioning tooth mold 22 includes a positioning cylinder, which is fixedly connected to the body 1 by fixing bolts, and is sleeved on the clamping assembly. A limiting tooth 23 is provided on the edge of the positioning cylinder.

[0045] Specifically, a suitable positioning tooth mold 22 is selected according to the different specifications of the half-shaft gear 3, the positioning cylinder is fixed in the installation groove by the fixing bolts, and the tooth surface of the half-shaft gear 3 is clamped on the limiting tooth 23 of the positioning cylinder. The force is evenly applied and the positioning effect is good, so that the half-shaft gear 3 will not loosen during processing.

[0046] In an embodiment of the present utility model, a guide rod 55 is provided on the movable hole 52, a guide hole matching the guide rod 55 is provided on the piston rod 51, and the guide rod 55 passes through the guide hole.

[0047] Specifically, the guide rod 55 is passed through the guide hole, so that the guide rod 55 can limit the movement direction of the piston rod 51 on the movable hole 52, avoiding radial rotation of the piston rod 51, thereby improving the operation stability of the entire pull rod 5 and the rivet rod 6.

[0048] Usage process

[0049] According to the different specifications of the half-axle gear 3, a suitable positioning tooth mold 22 is selected, the positioning cylinder is fixed in the installation groove by the fixing bolt, and the bolt 21 is tightened so that the end of the bolt 21 is pressed against the outer side surface of the positioning tooth mold 22, which can effectively realize the rapid positioning of the positioning tooth mold 22, and has the technical advantages of simple structure and reliable operation. After the floating mandrel fixture is connected to the processing equipment, the tooth surface of the half-axle gear 3 is clamped on the limiting tooth 23 of the positioning cylinder, and the expansion sleeve 4 is inserted into the through hole of the half-axle gear 3, and the processing is completed. The equipment pulls the pull rod 5 to mobilize the rivet rod 6 to move toward the tensioning rod 42, so that the tensioning bevel is connected to the guide bevel. After the expansion sleeve 4 expands, it clamps the half-shaft gear 3 thereon, thereby completing the floating clamping of the half-shaft gear 3, ensuring the runout of the outer circle after processing, with higher precision. After processing is completed, the processing equipment pushes the pull rod 5 to mobilize the rivet rod 6 to move away from the tensioning rod 42, and the support plate 62 on the rod body pushes the expansion sleeve 4 and the tensioning rod 42 away, so that the half-shaft gear 3 is separated from the expansion sleeve 4.

[0050] The above-described embodiments are only preferred embodiments for fully illustrating the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or changes made by technicians in the technical field on the basis of the present utility model are all within the protection scope of the present utility model. The protection scope of the present utility model shall be subject to the claims.

Claims

1. A floating mandrel fixture, characterized in that: include: ontology; A positioning tooth die is arranged on the processing end of the body, and the positioning tooth die is used to position the half-shaft gear; A clamping assembly is arranged on the processing end of the body, and the clamping assembly includes an expansion sleeve and a tightening block. The tightening block is arranged on the body, the expansion sleeve is sleeved on the tightening block, and the expansion sleeve is passed through the half-shaft gear; The pull rod assembly is arranged on the main body, the clamping assembly is drivingly connected to the pull rod assembly, and the pull rod assembly drives the expansion sleeve and the tensioning block to move relative to each other so as to clamp the half-axle gear on the expansion sleeve.

2. The floating mandrel fixture according to claim 1, characterized in that: The main body is provided with a mounting seat, the mounting seat is provided with a mounting groove matching the positioning tooth mold, a plurality of threaded holes are evenly arranged on the side wall of the mounting groove, the threaded holes are provided with bolts, and the ends of the bolts abut against the outer side surface of the positioning tooth mold.

3. The floating mandrel fixture according to claim 1, characterized in that: The tensioning block includes a fixed block and a pressure ring. A mounting platform is arranged on the main body. The fixed block is fixedly connected to the mounting platform via the pressure ring. A tensioning rod is arranged on the fixed block. The tensioning rod is passed through the tensioning hole of the expansion sleeve.

4. The floating mandrel fixture according to claim 3, characterized in that: The tensioning rod has a conical structure, the outer wall of the tensioning rod is provided with a tensioning slope, the inner side surface of the tensioning hole is provided with a guide slope matching the tensioning slope, the tensioning slope is connected to the guide slope, and the taper of the tensioning hole is greater than the taper of the tensioning rod.

5. The floating mandrel fixture according to claim 1, characterized in that: The clamping assembly also includes a rivet rod, which is inserted into the expansion sleeve. The tension block and the main body are provided with guide holes. The rivet rod passes through the guide hole and is connected to the pull rod assembly. The pull rod assembly drives the rivet rod to drive the expansion sleeve to move on the tension block to clamp the half-shaft gear.

6. The floating mandrel fixture according to claim 5, characterized in that: The rivet rod includes a rod body and a support plate, a pressure plate is arranged on one end of the rod body, a rotating hole is arranged on the pressure plate, the support plate is arranged on the rod body, and the support plate and the pressure plate are arranged opposite to each other, a support ring groove is arranged between the support plate and the pressure plate, the expansion sleeve is clamped on the support ring groove, and a threaded surface is arranged on the other end of the rod body.

7. The floating mandrel fixture according to claim 1, characterized in that: The pull rod assembly includes a pull rod, a piston rod is arranged on the pull rod, a movable hole is opened on the main body, the piston rod is passed through the movable hole, an end cover is arranged on the movable hole, and the pull rod is passed through the guide hole of the end cover, so that the piston rod cannot be detached from the movable hole.

8. The floating mandrel fixture according to claim 7, characterized in that: The depth of the movable hole is the same as the thickness of the piston rod. The end cover is provided with a movable groove, and the piston rod is slidably arranged on the movable groove.

9. The floating mandrel fixture according to claim 1, characterized in that: The positioning tooth mold comprises a positioning cylinder, the positioning cylinder is fixedly connected to the body through a fixing bolt, the positioning cylinder is sleeved on the clamping assembly, and a limiting tooth is arranged on the edge of the positioning cylinder.

10. The floating mandrel fixture according to claim 7, characterized in that: The movable hole is provided with a guide rod, the piston rod is provided with a guide hole matching the guide rod, and the guide rod is inserted through the guide hole.

Images