Drilling and positioning device for drive axle thrust rod bracket

Abstract

The drilling and positioning device of the driving axle thrust rod bracket comprises: a base; a plate-shaped positioning seat, on which a mounting hole is arranged, a positioning pin is inserted in the mounting hole and matches with the inner wall clearance of the mounting hole, and a positioning part is formed at each end of the positioning pin, and a matching part which is annular and protrudes outward is arranged at the outer periphery of the positioning part, and the projection of the outer contour of the matching part on the axial section of the positioning pin is an arc protruding outward from the middle part, and a limiting component for preventing the positioning pin from falling off from the two ends of the mounting hole is also arranged on the positioning seat; two support seats respectively located on both sides of the positioning seat, the support seats are fixed on the base and the tops thereof form a supporting plane; two clamping components respectively located on both sides of the positioning seat, the clamping components include clamping claws; and a driving unit for driving the clamping claws to move. The present invention improves the drilling accuracy of the thrust rod bracket and the efficiency of clamping the thrust rod bracket.

Description

Technical Field

[0001] The invention relates to the technical field of processing vehicle parts, and in particular to a drilling and positioning device for a driving axle thrust rod bracket. Background Art

[0002] The upper thrust rod bracket and the lower thrust rod bracket are important parts of the drive axle assembly. In order to meet the requirements of vehicle assembly, the upper and lower thrust rod brackets usually need to be drilled after processing and forming. In order to improve the accuracy of drilling, a special positioning fixture is usually required to clamp and fix them when drilling holes in the upper thrust rod bracket and the lower thrust rod bracket. The existing positioning fixtures all use fixed positioning pins and supporting planes to position the thrust rod bracket. Specifically, the positioning pins are inserted into the holes on the thrust rod bracket, and then a supporting plane is used to support a surface on the thrust rod bracket that is parallel to the central axis of the hole. In theory, this positioning method can ensure the accuracy of drilling, but in fact, due to certain processing errors in the thrust rod bracket, this structure is difficult to adapt to the processing errors of the thrust rod bracket, which results in the surface of the thrust rod bracket and the supporting surface cannot be completely abutted together after clamping, which ultimately affects the accuracy of drilling and makes it difficult for the thrust rod bracket to meet the requirements of vehicle assembly. Summary of the invention

[0003] In view of the deficiencies in the prior art, an object of the present invention is to provide a drilling positioning device for a drive axle thrust rod bracket, which can improve the drilling accuracy of the thrust rod bracket.

[0004] To achieve the above object, the present invention adopts the following technical solution:

[0005] The drilling and positioning device of the drive axle thrust rod bracket includes:

[0006] Base;

[0007] A positioning seat fixed on the base, the positioning seat is plate-shaped and includes two opposite side walls. The positioning seat is provided with a mounting hole extending from one side wall to the other side wall. A positioning pin is inserted into the mounting hole and matches the inner wall clearance of the mounting hole. The two ends of the positioning pin respectively form a positioning portion protruding from the two side walls. The outer periphery of the positioning portion is provided with a matching portion that is annular and protrudes outward. The projection of the outer contour of the matching portion on the axial section of the positioning pin is an arc with the middle portion protruding outward. The positioning seat is also provided with a limit assembly for preventing the positioning pin from falling off from the two ends of the mounting hole.

[0008] Two support seats are respectively located on both sides of the positioning seat, the support seats are fixed on the base and the tops of the support seats form a support plane;

[0009] Two clamping assemblies are respectively located on both sides of the positioning seat, and the clamping assemblies include clamping claws;

[0010] The driving unit is used for driving the clamping claw to move toward the side wall of the positioning seat to clamp the thrust rod bracket, and driving the clamping claw to move away from the side wall of the positioning seat to release the thrust rod bracket.

[0011] The limit assembly includes a movable rod and a limit pin. The movable rod is movably connected to the positioning seat from top to bottom. The extension direction of the movable rod is perpendicular to the axial direction of the positioning pin, and the lower end of the movable rod is connected to the positioning pin. The movable rod is provided with a limit groove extending along its length direction. The limit pin is fixed on the positioning seat and its inner end is slidably connected to the limit groove.

[0012] The limiting assembly also includes an elastic element, which is arranged between the movable rod and the positioning seat and is used to provide an elastic stress for pushing the movable rod downward.

[0013] The positioning seat is provided with a guide hole extending downward from its top end to the mounting hole, the movable rod is connected in the guide hole, the elastic element is a set of springs arranged outside the movable rod, the top end of the spring abuts against the positioning seat, and the bottom end abuts against the lower end of the movable rod.

[0014] The clamping assembly also includes a mounting seat installed on the base and slidable along the length direction of the base. The clamping claw is fixedly connected to the top of the mounting seat. The driving unit is used to drive the two mounting seats to move towards the positioning seat at the same time, or to move away from the positioning seat at the same time.

[0015] The driving unit comprises a first cylinder and two levers, the middle of the lever is hinged on the base, the tops of the two levers are respectively clamped on two mounting seats, and the first cylinder is used to drive the bottoms of the two levers to swing.

[0016] The driving unit also includes two sliders that can slide along the length direction of the base, and a movable block located between the two sliders. The first cylinder is used to drive the movable block to move along the width direction of the base. A first inclined surface is formed on both sides of the movable block, and the angles between the two first inclined surfaces and the width direction of the base are equal. A second inclined surface is respectively arranged on the two sliders, and the two second inclined surfaces are respectively attached to the two first inclined surfaces, and the bottoms of the two levers are respectively clamped on the two sliders.

[0017] One of the first inclined surface and the second inclined surface is provided with a slide groove with a dovetail-shaped cross section, and the other is provided with a boss which is slidably embedded in the slide groove and has the same cross-sectional shape as the slide groove.

[0018] The driving unit comprises two second cylinders, and the piston rods of the two second cylinders are respectively connected to the two mounting seats.

[0019] The support seat comprises two support parts distributed on both sides of the base, and the clamping claw is located between the two support parts on the same side of the positioning seat.

[0020] The beneficial effects of the present invention are:

[0021] In the present invention, since the matching portion of the positioning pin that matches the hole on the thrust rod bracket is arc-shaped, the inner wall line of the hole on the thrust rod bracket contacts and matches, so that the thrust rod bracket can be adaptively supported by the support surface on the top of the support seat, and ensure that the drilling portion on the thrust rod bracket has a high degree of fit with the support surface, thereby improving the drilling accuracy of the thrust rod bracket. At the same time, the positioning pin can float up and down, so that the positioning pin can be matched with the thrust rod bracket more quickly, and the efficiency of clamping the thrust rod bracket is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 for Figure 1 Magnified view at A in the middle;

[0024] Figure 3 for Figure 1 B-direction view;

[0025] Figure 4 for Figure 1 C-direction view;

[0026] Figure 5 It is a schematic diagram of the working state of the present invention. DETAILED DESCRIPTION

[0027] Below, in conjunction with the accompanying drawings and specific embodiments, the present invention is further described:

[0028] like Figure 1 , 2As shown in Figures 3 and 4, a drilling and positioning device for a driving axle thrust rod bracket of the present invention comprises a base 10, a positioning seat 20, two support seats 40, two clamping assemblies and a driving unit. The base 10 is the installation base part of the entire positioning device. The positioning seat 20 is fixed in the middle of the length direction of the base 10 (the X direction in the figure). The positioning seat 20 is plate-shaped and comprises two opposite side walls. A mounting hole 201 is arranged on the positioning seat. The extension direction of the mounting hole 201 is consistent with the length direction of the base 10, and the mounting hole 201 extends from one side wall of the positioning seat 20 to the other side wall. A positioning pin 21 is penetrated inside the mounting hole 201. The positioning pin 21 comprises a middle section 211 and two positioning portions 212 respectively located at both ends of the middle section 211. The length of the middle section 211 is equivalent to the depth of the mounting hole 201, and it is completely placed in the mounting hole 201. Inside the hole 201, two positioning parts 212 extend from the two ends of the mounting hole 201 and protrude from the two side walls of the positioning seat 20 respectively. The outer diameter of the middle section 211 is smaller than the inner diameter of the mounting hole 201, so that the positioning pin 21 is clearance-matched with the inner wall of the mounting hole 201, that is, the positioning pin 21 has a smaller swing amplitude relative to the positioning seat 20, and an annular and outwardly protruding matching part 213 is provided on the outer periphery of each positioning part 212. The projection of the matching part 213 on the axial cross-section of any positioning pin is an arc-shaped protruding outward from the middle part, that is, the matching part 213 is a rotating body structure with the central axis of the positioning pin 21 as the axis. In addition, a limit assembly is also provided on the positioning seat 20, which is used to limit the freedom of axial movement of the positioning pin 21 in the mounting hole 201 to prevent the positioning pin 21 from falling off from the two ends of the mounting hole 201. The two support seats 40 are fixed on the base and are respectively located on both sides of the positioning seat 20, and the top of each support seat 40 forms a support surface 41. The two clamping assemblies are respectively located on both sides of the positioning seat 20, and the clamping assemblies include clamping jaws 31. The driving unit is used to drive the clamping jaws 31 to move. Specifically, under the drive of the driving unit, the clamping jaws 31 can be close to the side wall of the positioning seat 20 to clamp the thrust rod bracket 90. Under the drive of the driving unit, the clamping jaws 31 can move in a direction away from the positioning seat 20 to loosen the thrust rod bracket 90. The driving unit is a power output unit, which drives the two clamping jaws 31 to move toward the positioning seat 20 at the same time or move in a direction away from the positioning seat 20 at the same time. The driving unit can also be two independent power output units, which respectively drive the two clamping jaws 31 to move at the same time.

[0029] join Figure 5As shown, when the thrust rod bracket 90 is clamped, the hole 91 on the thrust rod bracket 90 is aligned with the positioning pin 21, so that the positioning portion 212 of the positioning pin 21 is inserted into the hole 91 until the surface of the thrust rod bracket 90 that is opposite to the side wall of the positioning seat 20 abuts against the side wall of the positioning seat 20. In this way, a thrust rod bracket 90 is respectively arranged on both sides of the positioning seat 20, that is, the two thrust rod brackets 90 are clamped and positioned at the same time, and the positioning pin 21 cooperates with the hole 91 to limit the freedom of movement of the thrust rod bracket 90 in the height direction of the base 10 (i.e., the Z direction in the figure) and the width direction of the base 10 (i.e., the Y direction in the figure). However, since the matching portion 213 on the positioning portion 212 is in line contact with the inner wall of the hole 91, after the positioning portion 212 is inserted into the hole 91, the thrust rod bracket 90 can swing up and down relative to the positioning seat 20 within a smaller swing range, and the support at the top of the support seat 40 is supported. The support surface 41 supports the surface 92 on the thrust rod bracket 90 which is parallel to the axis of the hole 91. When the thrust rod bracket 90 can swing up and down within a smaller swing range, it is ensured that the support surface 41 and the surface 92 are well fitted. Finally, the clamping claw 31 is used to press the thrust rod bracket 90 against the positioning seat 20 on the side of the thrust rod bracket 90 away from the positioning seat 20, that is, the clamping claw 31 and the positioning seat 20 are used to clamp the thrust rod bracket 90; because the inner wall of the hole 91 on the thrust rod bracket 90 and the matching portion 213 on the positioning pin 21 are in line contact, the thrust rod bracket 90 can be adaptively swung up and down by a smaller angle, and then the support surface 41 at the top of the support seat 40 is used to support and push the thrust rod bracket 90, that is, the support surface 41 is used to position the thrust rod bracket 90, and when drilling the hole 93 in the thrust rod bracket 90, the drilling part and the support surface 41 are well fitted, thereby improving the drilling accuracy of the hole 93. In addition, when the locating portion 212 of the locating pin 21 is inserted into the hole 91, since the locating pin 21 and the inner wall of the mounting hole 201 are clearance-fitted, the locating pin 21 can move up and down relative to the locating seat 20 in the height direction, that is, the locating portion 212 on the locating pin 21 has a small degree of freedom to move up and down, so that it can better penetrate into the hole 91, thereby improving the efficiency of clamping the thrust rod bracket 90.

[0030] In order to adapt to the shape of the driving axle thrust rod bracket, the support seat 40 may include support parts distributed on both sides of the base 10, and the clamping claw 31 is located between the two support parts on the same side of the positioning seat 20.

[0031] The above-mentioned limiting assembly includes a movable rod 22 and a limiting pin 24. The movable rod 22 is movably connected to the positioning seat 20 from top to bottom, and its extension direction is consistent with the height direction of the base 10, that is, the extension direction of the movable rod 22 is perpendicular to the axial direction of the positioning pin 21, and the lower end of the movable rod 22 is connected to the positioning pin 21; in addition, a limiting groove 221 extending along the length direction is also provided on the movable rod 22, the limiting pin 24 is fixed on the positioning seat 20, and the inner end of the limiting pin 24 is slidably connected to the limiting groove 221, and the limiting pin 24 can slide in the limiting groove 221, that is, the range of up and down movement of the movable rod 22 is limited by the cooperation of the limiting pin 24 and the limiting groove 221, and then the range of up and down movement of the positioning pin 21 is limited. The limit assembly also includes a spring 23, which is arranged between the movable rod 22 and the positioning seat 20, and is used to provide an elastic stress to push the movable rod 22 downward. Specifically, a guide hole extending downward from the top surface of the positioning seat 20 is provided, and the guide hole extends to the middle of the above-mentioned mounting hole 201. The movable rod 22 is inserted into the guide hole, and the guide hole is used to guide the movable rod 22 to move up and down. The spring 23 is sleeved on the outside of the movable rod 22, and its lower end abuts against the lower end of the movable rod 22, and the upper end abuts against the positioning seat 20. The spring 23 always pushes the movable rod 22 to apply a downward elastic stress, so that the positioning pin 21 forms an elastic floating structure. When it cooperates with the thrust rod bracket 90, the positioning pin 21 can float up and down, and can be reset in time when the thrust rod bracket 90 is separated. In other embodiments, the above-mentioned spring 23 can also be replaced by other elastic elements, such as elastic rubber blocks.

[0032] The above-mentioned clamping assembly also includes a mounting seat 30, which is mounted on the base 10 and can slide along the length direction of the base 10, and the clamping claw 31 is fixed to the top of the mounting seat 30. The driving unit is used to drive the mounting seats 30 of the two clamping assemblies to move toward the positioning seat 20 at the same time, or to move away from the positioning seat 20 at the same time. Specifically, the driving unit includes a cylinder 50 and two levers 12. The middle parts of the two levers 12 are hinged on the base 10, and the tops of the two levers 12 are respectively clamped on the two At the bottom of the mounting seat 30, the cylinder 50 is used to drive the bottom of the two levers 12 to swing, and the lever 12 is pivotally connected to the base 10, so that the lever 12 forms a lever structure. The cylinder 50 drives the bottoms of the two levers 12 to swing inward at the same time, and the tops of the two levers 12 respectively drive the two mounting seats 30 to move away from the positioning seat 20. When the cylinder 50 drives the bottoms of the two levers 12 to swing outward at the same time, the mounting seat 30 is driven by the tops of the two levers 12 and simultaneously moves closer to the positioning seat 20. The driving unit also includes two sliders 11 and a movable block 51. The two sliders 11 are both mounted on the base 10 and can slide along the length direction of the base 10. The movable block 51 is located between the two sliders 11 and connected to the telescopic rod of the cylinder 50. The movable block 51 is driven by the cylinder 50 to move along the width direction of the base 10. The movable block 51 is configured as a V-shaped structure, with a first inclined surface formed on both sides thereof. The angles between the two first inclined surfaces and the width direction of the base 10 are equal. The sides of the two sliders 11 facing the movable block 51 are both configured as a second inclined surface. The second inclined surfaces on the two sliders 11 are respectively attached to the first inclined surfaces on both sides of the movable block 51. On the inclined surface, the bottoms of the two levers 12 are respectively clamped on the two sliders 11; a slide groove 111 is provided on the first inclined surface, and a boss 511 is provided on the second inclined surface, wherein the cross-sections of the slide groove 111 and the boss 511 are both dovetail-shaped, and the boss 511 is clamped in the slide groove 111. When the movable block 51 moves along the width direction of the base 10, the two sliders 11 can be pushed outward at the same time through the cooperation of the first inclined surface and the second inclined surface, or the two sliders 11 can be pulled inward at the same time through the boss 511, and then the two sliders 11 move toward each other at the same speed, or move in the direction away from each other, and then drive the two levers 12 to swing at the same time.

[0033] In other embodiments, the driving unit may include two cylinders, the piston rods of the two cylinders are respectively connected to the two mounting seats 30, and the two cylinders are started simultaneously, thereby driving the two mounting seats 30 to move toward each other at the same speed, or to move away from each other.

[0034] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. Drilling and positioning device for the drive axle thrust rod bracket, It is characterized in that include: Base; A positioning seat fixed on the base, the positioning seat is plate-shaped and includes two opposite side walls. The positioning seat is provided with a mounting hole extending from one side wall to the other side wall. A positioning pin is inserted into the mounting hole and matches the inner wall clearance of the mounting hole. The two ends of the positioning pin respectively form a positioning portion protruding from the two side walls. The outer periphery of the positioning portion is provided with a matching portion that is annular and protrudes outward. The projection of the outer contour of the matching portion on the axial section of the positioning pin is an arc with the middle portion protruding outward. The positioning seat is also provided with a limit assembly for preventing the positioning pin from falling off from the two ends of the mounting hole. Two support seats are respectively located on both sides of the positioning seat, the support seats are fixed on the base and the tops of the support seats form a support plane; Two clamping assemblies are respectively located on both sides of the positioning seat, and the clamping assemblies include clamping claws and a mounting seat mounted on the base and slidable along the length direction of the base; A driving unit, used for driving the clamping claws to move toward the side wall of the positioning seat to clamp the thrust rod bracket, and driving the clamping claws to move away from the side wall of the positioning seat to release the thrust rod bracket; Align the hole on the thrust rod bracket with the locating pin, and insert the locating portion of the locating pin into the hole until the surface of the thrust rod bracket facing the side wall of the locating seat abuts against the side wall of the locating seat.

2. The drilling and positioning device for the drive axle thrust rod bracket according to claim 1, It is characterized in that The limit assembly includes a movable rod and a limit pin. The movable rod is movably connected to the positioning seat from top to bottom. The extension direction of the movable rod is perpendicular to the axial direction of the positioning pin, and the lower end of the movable rod is connected to the positioning pin. The movable rod is provided with a limit groove extending along its length direction. The limit pin is fixed on the positioning seat and its inner end is slidably connected to the limit groove.

3. The drilling and positioning device for the drive axle thrust rod bracket according to claim 2, It is characterized in that The limiting assembly also includes an elastic element, which is arranged between the movable rod and the positioning seat and is used to provide an elastic stress for pushing the movable rod downward.

4. The drilling and positioning device for the drive axle thrust rod bracket according to claim 3, It is characterized in that The positioning seat is provided with a guide hole extending downward from its top end to the mounting hole, the movable rod is connected in the guide hole, the elastic element is a set of springs arranged outside the movable rod, the top end of the spring abuts against the positioning seat, and the bottom end abuts against the lower end of the movable rod.

5. The drilling and positioning device for the drive axle thrust rod bracket according to claim 1, It is characterized in that The driving unit comprises a first cylinder and two levers, the middle of the lever is hinged on the base, the tops of the two levers are respectively clamped on two mounting seats, and the first cylinder is used to drive the bottoms of the two levers to swing.

6. The drilling and positioning device for the drive axle thrust rod bracket according to claim 5, It is characterized in that The driving unit also includes two sliders that can slide along the length direction of the base, and a movable block located between the two sliders. The first cylinder is used to drive the movable block to move along the width direction of the base. A first inclined surface is formed on both sides of the movable block, and the angles between the two first inclined surfaces and the width direction of the base are equal. A second inclined surface is respectively arranged on the two sliders, and the two second inclined surfaces are respectively attached to the two first inclined surfaces, and the bottoms of the two levers are respectively clamped on the two sliders.

7. The drilling and positioning device for the drive axle thrust rod bracket according to claim 6, It is characterized in that One of the first inclined surface and the second inclined surface is provided with a slide groove with a dovetail-shaped cross section, and the other is provided with a boss which is slidably embedded in the slide groove and has the same cross-sectional shape as the slide groove.

8. The drilling and positioning device for the drive axle thrust rod bracket according to claim 1, It is characterized in that The driving unit comprises two second cylinders, and the piston rods of the two second cylinders are respectively connected to the two mounting seats.

9. The drilling and positioning device for the drive axle thrust rod bracket according to claim 1, It is characterized in that The support seat comprises two support parts distributed on both sides of the base, and the clamping claw is located between the two support parts on the same side of the positioning seat.

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