Special tool for machining small inclined hole in hollow piston rod of shock absorber

Abstract

The utility model discloses a special tool for processing a small inclined hole of a hollow piston rod of a shock absorber, which comprises a base horizontally arranged; one end of the guide rail bottom plate is connected with the base, and an included angle is formed between the guide rail bottom plate and the base; the air cylinder fixing plate is fixed at the other end of the guide rail bottom plate; a through hole is formed in the air cylinder fixing plate; the air cylinder comprises an air cylinder body and a piston rod; the cylinder body is fixedly connected to the cylinder fixing plate; the guide rail is arranged on the guide rail bottom plate in the axial direction of the air cylinder; the sliding block is connected to the guide rail in a matched mode; the free end of the piston rod penetrates through the through hole to be connected with the sliding block. The positioning plate is fixedly connected to the guide rail bottom plate; one end of the positioning column is fixedly connected with the positioning plate; the tensioning positioning sleeve is arranged at the other end of the positioning column in a sleeving manner; the two ends of the reset spring are connected with the tensioning positioning sleeve and the positioning column respectively.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile shock absorbers, and particularly relates to a special tool for machining small oblique holes of hollow piston rods of shock absorbers. Background Art

[0002] At present, whether it is CNC machining or manual machining, most of them use universal tooling for clamping. This clamping method cannot effectively perform free-degree positioning, and the drill bit has a small diameter and poor rigidity. It is very easy to cause the drill bit to break due to unstable positioning during the processing process. Frequent replacement of drill bits brings great challenges to the production cycle and process quality, and cannot meet the needs of mass production.

[0003] Small holes are a technical difficulty in all hole processing, and there are problems such as large quantity and volatile quality. At the same time, the difficulty of processing small holes increases with the decrease of diameter. There are great problems in processing efficiency and quality stability, and an efficient and fast positioning method is urgently needed to solve it. Utility Model Content

[0004] The utility model aims to solve the defects of the current processing technology of small holes in the hollow piston rod of the shock absorber, and provides a special tool for processing small oblique holes in the hollow piston rod of the shock absorber, which has a simple structure and enables the hollow piston rod of the shock absorber to be clamped quickly and positioned accurately.

[0005] The technical solution provided by the utility model is:

[0006] A special tool for processing a small oblique hole of a hollow piston rod of a shock absorber, comprising:

[0007] a base, which is arranged horizontally;

[0008] A guide rail bottom plate, which is a rectangular parallelepiped plate, one end of which is connected to the base, and an angle is formed between the guide rail bottom plate and the base;

[0009] A cylinder fixing plate, which is fixedly connected to the other end of the guide rail bottom plate; the cylinder fixing plate is provided with a through hole;

[0010] The cylinder comprises: a cylinder body and a piston rod; the cylinder body is fixedly connected to the cylinder fixing plate;

[0011] A guide rail, which is arranged on the guide rail bottom plate along the axial direction of the cylinder;

[0012] A slider, which is matched and connected to the guide rail;

[0013] Wherein, the free end of the piston rod passes through the through hole and is connected to the slider; the movement of the piston rod causes the slider to slide along the guide rail;

[0014] A positioning plate, which is fixedly connected to the guide rail bottom plate;

[0015] A positioning column, one end of which is fixedly connected to the positioning plate;

[0016] A tensioning positioning sleeve, which is sleeved on the other end of the positioning column;

[0017] A return spring, which is arranged in the tensioning and positioning sleeve, and the two ends of the return spring are respectively connected to the tensioning and positioning sleeve and the end of the positioning column;

[0018] Wherein, a groove is arranged on the top of the sliding block, the small diameter end of the workpiece to be processed is placed in the groove, and the large diameter end faces the tensioning and positioning sleeve and is coaxially arranged with the tensioning and positioning sleeve.

[0019] Preferably, the base is in the shape of a cuboid; four corners of the base are provided with mounting holes so that the base can be mounted on a workbench.

[0020] Preferably, the angle between the guide rail bottom plate and the base is 30°.

[0021] Preferably, the positioning column is composed of a first truncated cone and a first cylinder axially connected; the lower surface of the first cylinder is connected to the positioning plate.

[0022] Preferably, one end of the tensioning and positioning sleeve is a second hollow truncated cone with a notch, and the other end is tensioning teeth with evenly distributed protrusions, and the tensioning teeth are arranged along the circumference of the tensioning and positioning sleeve; one end of the tensioning and positioning sleeve with the tensioning teeth is coaxially sleeved outside the first truncated cone.

[0023] Preferably, the positioning plate is vertically arranged to the guide rail bottom plate; the positioning plate and the base are supported and fixed by two triangular support plates arranged in parallel.

[0024] Preferably, the middle portion of the guide rail bottom plate is fixedly connected to the base via an inclined support plate; and one end of the inclined support plate connected to the guide rail bottom plate is an inclined surface.

[0025] Preferably, it also includes: a spring positioning column, which is composed of a second cylinder and a third cylinder axially connected; the second cylinder is arranged on the outside of the tensioning positioning sleeve, the third cylinder is arranged between the tensioning positioning sleeve and the first cone, and the reset spring is wound around the third cylinder.

[0026] The beneficial effects of the utility model are as follows: the special tooling for processing the small oblique hole of the hollow piston rod of the shock absorber provided by the utility model has a simple structure and enables the hollow piston rod of the shock absorber to be clamped quickly and positioned accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The utility model is a schematic diagram of the overall structure of a special tool for machining a small inclined hole in a hollow piston rod of a shock absorber.

[0028] Figure 2 This is a schematic diagram of the positioning column structure of the utility model.

[0029] Figure 3 This is a schematic diagram of the connection structure between the tensioning and positioning sleeve and the positioning column described in the utility model.

[0030] Figure 4 It is a schematic diagram of processing the fine inclined hole of the hollow piston rod of the shock absorber described in the utility model.

[0031] Figure 5 This is a schematic diagram of the installation structure of the hollow piston rod of the shock absorber described in the utility model. DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0033] like Figure 1As shown, the utility model provides a special tooling for processing small oblique holes of hollow piston rods of shock absorbers, which includes: a base 260, which is in the shape of a rectangular parallelepiped; the base 260 is arranged horizontally; four corners of the base 260 are provided with mounting holes 261, so that the base 260 can be mounted on a workbench; a guide rail bottom plate 220, which is a rectangular parallelepiped plate; one end of the guide rail bottom plate 220 is connected to the base 260 through a positioning plate 230, and there is an angle of 30° between the guide rail bottom plate 220 and the base 260; the middle part of the guide rail bottom plate 220 is fixedly connected to the base 260 through an inclined support plate 250, and one end of the inclined support plate 250 connected to the guide rail bottom plate 220 is an inclined surface, and the inclined support plate 250 supports the guide rail bottom plate 220 and fixes the angle between the guide rail bottom plate 220 and the base 260; a cylinder fixing plate 210, which is a rectangular block; the cylinder fixing plate 210 is fixedly connected to the other end of the guide rail bottom plate 220; a through hole is provided on the cylinder fixing plate 210; a cylinder 110, which comprises: a cylinder body 111 and a piston rod 112; one end of the cylinder body 111 connected to the piston rod 112 is fixedly connected to the cylinder fixing plate 210; the piston rod 112 passes through the through hole; a guide rail 130, which is arranged on the guide rail bottom plate 220 along the axial direction of the cylinder 110; a slider 120, a V-shaped groove is provided on the top; the slider 120 is matched and connected to the guide rail bottom plate 220. The guide rail 130 is provided with a plurality of guide rails 130, wherein the free end of the piston rod 112 passes through the through hole and is connected to the slider 120; the cylinder 110 moves the piston rod 112, thereby causing the slider 120 to slide axially along the guide rail 130; the positioning plate 230 is a rectangular block; the positioning plate 230 is obliquely arranged on the base 260, and the positioning plate 230 is vertically arranged with the guide rail bottom plate 220; one end of the positioning plate 230 is fixedly connected with the base 260 by welding with a rib plate, and the other end is fixedly connected with the base 260 by two triangular support plates 240 arranged in parallel, and the triangular support plates 240 support the positioning plate 230 and fix the angle between the positioning plate 230 and the base 260; ... triangular support plates 240 support the positioning plate 230 and fix the angle between the positioning plate 230 and the base 260; the positioning plate 230 is fixedly connected with the base 260 by welding with a rib plate, and the triangular support plates 240 are fixedly connected with the base 260 by two triangular support plates 240 arranged in parallel, and the triangular support plates 240 support the positioning plate 230 and fix the angle between the positioning plate 230 and the base 260; the positioning plate 230 is fixedly connected with the base 260 The positioning column 150 is composed of a first truncated cone 151 and a first cylindrical body 152 connected axially; the lower surface of the first truncated cone 151 is connected to the upper surface of the first cylindrical body 152, and the lower surface of the first cylindrical body 152 is connected to the positioning plate 230, so that one end of the positioning column 150 is fixed on the positioning plate 230; the outer circle diameter of the lower bottom surface of the first truncated cone 151 is larger than the diameter of the first cylindrical body 152; the tensioning positioning sleeve 140 is sleeved on the other end of the positioning column 150; one end of the tensioning positioning sleeve 140 is a hollow second truncated cone 141 with a notch 143, and the other end is a uniformly distributed protruding tensioning tooth 142, and the tensioning tooth 142 is arranged along the circumference of the tensioning positioning sleeve 140;The end of the tensioning and positioning sleeve 140 with the tensioning teeth 142 is coaxially sleeved on the outside of the first truncated cone 151; the outer diameter of the lower bottom surface of the first truncated cone 151 is the same as the outer diameter of the lower bottom surface of the second truncated cone 141; wherein the small-diameter end rod-shaped structure 311 of the workpiece 310 to be processed is placed in the V-shaped groove, and the large-diameter end cylindrical structure 312 faces the tensioning and positioning sleeve 140 and is coaxially arranged with the tensioning and positioning sleeve 140; the inner diameter of the end of the tensioning and positioning sleeve 140 with the tensioning teeth 142 is larger than the outer diameter of the upper bottom surface of the first truncated cone 151; the cylinder fixing plate 210 and the positioning plate 230 are arranged at both ends of the guide rail bottom plate 220 in parallel, and the width of the cylinder fixing plate 210 is smaller than the width of the positioning plate 230; the reset spring 160 is arranged in the tensioning and positioning sleeve 140, and the two ends of the reset spring 160 are respectively connected to the tensioning and positioning sleeve 140. The tensioning and positioning sleeve 140 is connected to the end of the positioning column 150; one end of the reset spring 160 is connected to the tensioning and positioning sleeve 140, and the other end is connected to the upper bottom surface of the first truncated cone 151. After the tensioning and positioning sleeve 140 and the positioning column 150 are sleeved, the reset spring 160 is arranged between the tensioning and positioning sleeve 140 and the first truncated cone 151; the spring positioning column 170 is composed of a second cylinder 171 and a third cylinder 172 connected axially; the height of the third cylinder 172 is greater than the height of the second cylinder 171, and the diameter of the third cylinder 172 is smaller than the diameter of the second cylinder 171; the second cylinder 171 is arranged outside the tensioning and positioning sleeve 140, and the third cylinder 172 is arranged between the tensioning and positioning sleeve 140 and the first truncated cone 151, and the reset spring 160 is wound around the third cylinder 172. ;

[0034] The connection of the various components in the special tooling for processing the small inclined hole of the hollow piston rod of the shock absorber provided by the utility model can be achieved by bolt connection or welding; the cylinder 110 can also be replaced by an electric cylinder.

[0035] like Figure 2 As shown, a threaded hole 153 is provided at the center of the first truncated cone 151 of the positioning column 150; a thread is provided on the outer surface of the lower end of the third cylinder 172; the first truncated cone 151 and the third cylinder 172 are connected by threads, so that the positioning column 150 is connected and fixed to the spring positioning column 170.

[0036] like Figure 3As shown, the outer surface of the second truncated cone 141 has a slope, so that the tensioning and positioning sleeve 140 plays a guiding role when entering the inner side of the workpiece 310; the notch 143 of the second truncated cone 141 provides a processing space for processing the workpiece 310 with small inclined holes, so that there is still space after the drill bit passes through the workpiece 310, thereby preventing damage to the drill bit and the special tooling for processing the small inclined holes of the hollow piston rod of the shock absorber.

[0037] The spring positioning column 170 fixes the initial position between the tensioning positioning sleeve 140 and the positioning column 150, and prevents the return spring 160 from bouncing the tensioning positioning sleeve 140 away, thereby fixing the relative position between the return spring 160, the tensioning positioning sleeve 140 and the positioning column 150, and preventing the problem of being unable to reset the initial position of the tensioning positioning sleeve 140 and the positioning column 150 due to the change in the position of the return spring 160.

[0038] The length of the tensioning positioning sleeve 140 and the positioning column 150 after being combined is greater than the length of the large-diameter end cylindrical structure 312, so that the large-diameter end cylindrical structure 312 can be clamped within a certain distance, thereby completing the processing of a small inclined hole.

[0039] like Figure 4 As shown, the workpiece 310 needs to be processed with a small inclined hole at the connection between the small-diameter end rod-shaped structure 311 and the large-diameter end cylinder-shaped structure 312 .

[0040] like Figure 5 As shown, the large diameter end cylindrical structure 312 of the workpiece 310 to be processed is sleeved on the outside of the tensioning and positioning sleeve 140, and the small diameter end rod-shaped structure 311 is placed in the slide groove 120, and the upper bottom surface of the second truncated cone 141 contacts the bottom of the large diameter end cylindrical structure 312; the cylinder 110 starts to work, so that the piston rod 112 is pushed out under the action of the air source pressure, pushing the slider 120 to slide downward along the guide rail 130, thereby pushing the large diameter end cylindrical structure 312 to slide downward. The upper bottom surface of the second truncated cone 141 contacts the bottom of the large-diameter end cylindrical structure 312, so the tensioning tooth 142 at the lower end of the tensioning positioning sleeve 140 moves along the upper bottom surface of the first truncated cone 151 toward the lower bottom surface of the first truncated cone 151, so that the circumference of the tensioning tooth 142 gradually expands; the tensioning tooth 142 contacts the inner wall of the large-diameter end cylindrical structure 312, and after completing the expansion and clamping positioning, the cylinder 110 stops working and enters the pressure-maintaining state to maintain the position of the workpiece 310 being processed.

[0041] After the processing of the fine inclined hole of the workpiece 310 is completed, the cylinder 110 starts to work and shrinks and resets, so that the piston rod 112 drives the slider 120 to move upward along the slide rail 130; under the action of the reset spring 160, the tensioning positioning sleeve 140 moves from the lower bottom surface of the first truncated table 151 to the upper bottom surface of the first truncated table 151, and the tensioning teeth 142 shrink circumferentially to release the tensioned state of the workpiece 310. When the slider 120 and the tensioning positioning sleeve 140 are reset, the workpiece 310 is removed, and the processing of the fine inclined hole is completed.

[0042] The utility model provides a special tooling for processing small oblique holes in the hollow piston rod of the shock absorber, which has a simple structure and enables the shock absorber hollow piston rod 310 to be quickly clamped and accurately positioned. The utility model effectively positions the various degrees of freedom of the shock absorber hollow piston rod 310 through the design of the tensioning and positioning sleeve 140, improves the accuracy of the processing position, and with the cooperation of the built-in reset spring 160 and the cylinder 110, enhances the positioning accuracy while reducing the pinching and bumping of the positioning surface, and avoids the starting position, end position, size and shape and position standard deviation of the small hole after processing. The special tooling for processing small oblique holes in the hollow piston rod of the shock absorber provided by the utility model meets the design requirements of special products, realizes fast clamping, and improves production efficiency. At the same time, because the tooling is designed according to the specified angle, it realizes the control of the special angle of the product and ensures the dimensional accuracy of the product.

[0043] The special tooling for processing the small oblique hole of the hollow piston rod of the shock absorber provided by the utility model can be combined with the automation program and connected with the equipment, so as to reduce the auxiliary time in the production process, improve the output efficiency and quality consistency of the product, reduce the product manufacturing cost and reduce the quality risk.

[0044] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A special tool for processing small inclined holes in the hollow piston rod of a shock absorber, characterized in that: include: a base, which is arranged horizontally; A guide rail bottom plate, which is a rectangular parallelepiped plate, one end of which is connected to the base, and an angle is formed between the guide rail bottom plate and the base; A cylinder fixing plate, which is fixedly connected to the other end of the guide rail bottom plate; the cylinder fixing plate is provided with a through hole; The cylinder comprises: a cylinder body and a piston rod; the cylinder body is fixedly connected to the cylinder fixing plate; A guide rail, which is arranged on the guide rail bottom plate along the axial direction of the cylinder; A slider, which is matched and connected to the guide rail; Wherein, the free end of the piston rod passes through the through hole and is connected to the slider; the movement of the piston rod causes the slider to slide along the guide rail; A positioning plate, which is fixedly connected to the guide rail bottom plate; A positioning column, one end of which is fixedly connected to the positioning plate; A tensioning positioning sleeve, which is sleeved on the other end of the positioning column; A return spring, which is arranged in the tensioning and positioning sleeve, and the two ends of the return spring are respectively connected to the tensioning and positioning sleeve and the end of the positioning column; Wherein, a groove is arranged on the top of the sliding block, the small diameter end of the workpiece to be processed is placed in the groove, and the large diameter end faces the tensioning and positioning sleeve and is coaxially arranged with the tensioning and positioning sleeve.

2. The special tooling for processing small inclined holes in hollow piston rods of shock absorbers according to claim 1 is characterized in that: The base is in the shape of a cuboid; four corners of the base are provided with mounting holes so that the base can be mounted on a workbench.

3. The special tooling for processing small inclined holes in hollow piston rods of shock absorbers according to claim 2 is characterized in that: The included angle between the guide rail bottom plate and the base is 30°.

4. The special tooling for processing small inclined holes in hollow piston rods of shock absorbers according to claim 1 is characterized in that: The positioning column is composed of a first truncated cone and a first cylinder axially connected; the lower surface of the first cylinder is connected to the positioning plate.

5. The special tooling for processing the small inclined hole of the hollow piston rod of the shock absorber according to claim 4 is characterized in that: One end of the tensioning and positioning sleeve is a hollow second truncated cone with a notch, and the other end is tensioning teeth with evenly distributed protrusions, and the tensioning teeth are arranged along the circumference of the tensioning and positioning sleeve; one end of the tensioning and positioning sleeve with the tensioning teeth is coaxially sleeved outside the first truncated cone.

6. The special tooling for processing the small inclined hole of the hollow piston rod of the shock absorber according to claim 2 is characterized in that: The positioning plate is vertically arranged with respect to the guide rail bottom plate; the positioning plate and the base are supported and fixed by two triangular support plates arranged in parallel.

7. The special tooling for processing the small inclined hole of the hollow piston rod of the shock absorber according to claim 2 is characterized in that: The middle part of the guide rail bottom plate is fixedly connected to the base via an inclined support plate; one end of the inclined support plate connected to the guide rail bottom plate is an inclined surface.

8. The special tooling for processing the small inclined hole of the hollow piston rod of the shock absorber according to claim 5 is characterized in that: Also includes: The spring positioning column is composed of a second cylinder and a third cylinder axially connected; the second cylinder is arranged outside the tensioning positioning sleeve, the third cylinder is arranged between the tensioning positioning sleeve and the first truncated cone, and the reset spring is wound on the third cylinder.

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