Automobile steering system worm processing fixing tool

Abstract

The utility model relates to worm processing technical field, concretely is a kind of automobile steering system worm processing fixed tool, including processing seat, the upside of processing seat is provided with two groups of clamping assembly that can slide oppositely, clamping assembly includes mounting plate, hydraulic cylinder, connecting block, positioning sleeve, positioning rod, clamping rod, transmission rod and clamping block, clamping block is provided with two groups, the middle position of the opposite side of two groups of clamping block is fixedly connected with abutment plate, the upper and lower sides of abutment plate are all provided with wedge-shaped block that can be adjusted up and down;Through two groups of clamping assembly, it can be synchronous opposite sliding on the surface of processing seat, the distance between two groups of clamping assembly is adjusted, so as to adapt to different length worm, simultaneously by the two groups of wedge-shaped block on the surface of clamping block opposite sliding, the distance between two groups of wedge-shaped block is adjusted, and then different diameter worm can be adapted, different diameter worm can be realized six point fixed, improve the stability of different diameter worm clamping.

Description

Technical Field

[0001] This utility model relates to the field of worm gear processing technology, specifically to a fixing fixture for processing worm gears in automotive steering systems. Background Technology

[0002] As a key transmission component in automotive steering systems, the machining accuracy of the worm gear directly affects the transmission efficiency and service life of the steering system. CN222588303U discloses a worm gear machining positioning device, including a main board; an auxiliary positioning device mounted on the main board; clamping mechanisms mounted on the frame of the moving bracket; guide plates rotatably mounted on the top of each clamping block via pins; an adjustment groove on the top of each clamping block; a moving block sleeved on the outer surface of the worm gear cross-section; a push rod fixedly connected to the top of each moving block; a sliding block disposed inside the convex groove; the top of the push rod connected to the sliding block; a fixing plate fixedly connected to the bottom of each clamping block; a limit rod slidably mounted inside the sliding hole; and a rubber sleeve sleeved on the outer surface of the limit rod cross-section. Through the auxiliary positioning device, the worm gear is initially limited, facilitating subsequent positioning and clamping operations and improving the efficiency of worm gear clamping and positioning.

[0003] The device uses a clamping mechanism to drive clamping blocks on both sides to clamp and fix the end of the worm. However, in actual use, since the size of the clamping blocks is fixed, it cannot effectively fix the end of the worm when clamping worms of different diameters, which makes the worm prone to shaking and affects the machining accuracy.

[0004] Therefore, it is necessary to invent a fixing fixture for machining the worm gear of an automotive steering system to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a fixing fixture for machining worm gears in automotive steering systems, in order to solve the problem that when clamping worm gears of different diameters, it is impossible to effectively fix the end of the worm gear, which makes the worm gear prone to shaking and affects the machining accuracy.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a worm gear machining and fixing fixture for an automotive steering system, comprising a machining base, wherein two sets of opposing sliding clamping assemblies are provided on the upper side of the machining base, the clamping assembly comprising a mounting plate, a hydraulic cylinder, a connecting block, a positioning sleeve, a positioning rod, a clamping rod, a transmission rod, and a clamping block, wherein two sets of clamping blocks are provided, and an abutment plate is fixedly connected to the middle position of the opposite side of each of the two sets of clamping blocks, and wedge blocks that can be adjusted up and down are provided on the upper and lower sides of the abutment plate.

[0007] By adopting the above technical solution, the two sets of clamping components can slide synchronously against each other on the surface of the machining base, and the distance between the two sets of clamping components can be adjusted to accommodate worms of different lengths. At the same time, by sliding the two sets of wedge blocks on the surface of the clamping block against each other, the distance between the two sets of wedge blocks can be adjusted, thereby accommodating worms of different diameters. Six-point fixation can be achieved for worms of different diameters, improving the stability of clamping worms of different diameters.

[0008] Optionally, the hydraulic cylinder is fixedly installed on the side of the mounting plate, and connecting blocks are fixedly connected to both the front and rear sides of the mounting plate. An inclined positioning sleeve is fixedly connected to the end of each of the two sets of connecting blocks away from the mounting plate, and a positioning rod is slidably connected inside the two sets of positioning sleeves.

[0009] By adopting the above technical solution, the positioning rod slides inside the positioning sleeve. During the sliding process, one end of the two sets of positioning rods moves closer to or further away from each other.

[0010] Optionally, clamping rods are fixedly connected to the adjacent ends of the two sets of positioning rods, and clamping blocks are fixedly connected to the ends of the two sets of clamping rods away from the positioning rods, respectively. An inclined support block is fixedly connected between the clamping block and the clamping rod.

[0011] By adopting the above technical solution, during the sliding process of the positioning rod inside the positioning sleeve, it drives the two sets of clamping rods to move closer to each other or separate from each other, thereby driving the two sets of clamping rods to move closer to each other or separate from each other, clamping and fixing the worm gear. The inclined support block is used to improve the stability of the clamping block.

[0012] Optionally, a transmission rod is rotatably connected to the connection between the positioning rod and the clamping block of both sets of positioning rods, and the end of each transmission rod away from the positioning rod is rotatably connected to the piston rod in the hydraulic cylinder.

[0013] By adopting the above technical solution, during the outward pushing of the piston, the two sets of transmission rods drive the two sets of positioning rods and clamping blocks to move closer together to clamp the worm. During the inward retraction of the piston rod, the two sets of transmission rods drive the two sets of positioning rods and clamping blocks to move away from each other to relax the worm.

[0014] Optionally, two sets of linear guide rails are fixedly connected between the inner top wall and the inner bottom wall of the clamping block, and a bidirectional lead screw is provided between the two sets of linear guide rails. The lower end of the bidirectional lead screw is rotatably connected to the inner bottom wall of the clamping block.

[0015] Optionally, a connecting seat is fixedly connected to the upper end of the clamping block, an adjusting knob is rotatably connected to the upper surface of the connecting seat, the adjusting knob is fixedly connected to the upper end of the bidirectional lead screw via a connecting shaft, a ratchet is fixedly connected to the lower surface of the adjusting knob, and a pawl is provided on the upper surface of the connecting seat at the side of the ratchet.

[0016] By adopting the above technical solution, the adjustment knob rotates around the connecting seat, which in turn drives the bidirectional lead screw to rotate inside the clamping block. The ratchet and pawl work together to lock the adjustment knob, preventing the bidirectional lead screw from rotating during the clamping process.

[0017] Optionally, two sets of upper and lower transmission blocks are slidably connected between the two sets of linear guides. The middle parts of the two sets of transmission blocks are respectively threaded to the upper and lower ends of the bidirectional lead screw. Limit blocks are fixedly connected to both ends of the two sets of transmission blocks.

[0018] By adopting the above technical solution, during the rotation of the bidirectional lead screw, it cooperates with the linear guide rail to drive two sets of transmission blocks to slide up and down in opposite directions.

[0019] Optionally, two sets of limiting grooves are provided on the opposite side surface of the two sets of clamping blocks, and the limiting blocks pass through the limiting grooves and are fixedly connected to the wedge blocks.

[0020] By adopting the above technical solution, the two sets of transmission blocks, together with the limiting block, drive the upper and lower sets of wedge blocks to slide in opposite directions, thereby adjusting the distance between them.

[0021] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0022] This invention utilizes two sets of clamping components that can slide synchronously against each other on the surface of the machining base. The distance between the two sets of clamping components can be adjusted to accommodate worms of different lengths. Simultaneously, by sliding two sets of wedge blocks against each other on the surface of the clamping block, the distance between the two sets of wedge blocks can be adjusted to accommodate worms of different diameters. It can achieve six-point fixation for worms of different diameters, thereby improving the stability of clamping worms of different diameters. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the clamping component structure of this utility model;

[0025] Figure 3 This is a schematic diagram of the external structure of the clamping block of this utility model;

[0026] Figure 4 This is a schematic diagram of the internal structure of the clamping block of this utility model;

[0027] Figure 5 This utility model Figure 4 A schematic diagram of the structure at point A in the diagram.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Machining base; 2. Clamping assembly; 21. Mounting plate; 22. Hydraulic cylinder; 23. Connecting block; 24. Positioning sleeve; 25. Positioning rod; 26. Clamping rod; 27. Transmission rod; 28. Clamping block; 281. Limiting groove; 282. Abutment plate; 283. Wedge block; 284. Two-way lead screw; 285. Linear guide rail; 286. Transmission block; 287. Limiting block; 288. Connecting base; 289. Adjusting knob; 2810. Ratchet; 2811. Pawl; 29. ​​Diagonal brace block. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0031] This utility model provides, for example Figures 1 to 3 The illustrated fixture for machining a worm gear in an automotive steering system includes a machining base 1. Two sets of opposing sliding clamping assemblies 2 are mounted on the upper side of the machining base 1. Each clamping assembly 2 includes a mounting plate 21, a hydraulic cylinder 22, connecting blocks 23, positioning sleeves 24, positioning rods 25, clamping rods 26, a transmission rod 27, and clamping blocks 28. The hydraulic cylinder 22 is fixedly mounted on the side of the mounting plate 21. Connecting blocks 23 are fixedly connected to both the front and rear sides of the mounting plate 21. Inclined positioning sleeves 24 are fixedly connected to the ends of the two sets of connecting blocks 23 facing away from the mounting plate 21. Positioning rods 25 are slidably connected inside the two sets of positioning sleeves 24. Each of the five clamping blocks has a clamping rod 26 fixedly connected to one end of each clamping rod 26. Two sets of clamping blocks 28 are fixedly connected to the ends of the two clamping rods 26 away from the positioning rod 25. An inclined support block 29 is fixedly connected between the clamping block 28 and the clamping rod 26. A transmission rod 27 is rotatably connected to the connection between the two sets of positioning rods 25 and the clamping block 28. The ends of the two sets of transmission rods 27 away from the positioning rod 25 are rotatably connected to the piston rod in the hydraulic cylinder 22. Two sets of clamping blocks 28 are provided. An abutment plate 282 is fixedly connected to the middle of the opposite side of the two sets of clamping blocks 28. An adjustable wedge block 283 is provided on both the upper and lower sides of the abutment plate 282.

[0032] The machining base 1 is equipped with a bidirectional synchronous adjustment mechanism. The two sets of clamping components 2 are driven to slide in opposite directions by the cooperation of a motor and a bidirectional screw, thereby adjusting the distance between the two sets of clamping components 2.

[0033] During the process of fixing the worm gear, the worm gear is placed between the two sets of clamping components 2. At this time, the hydraulic cylinders 22 at both ends are activated, and the piston rods in the hydraulic cylinders 22 push outwards simultaneously. At this time, the two sets of transmission rods 27 drive the two sets of positioning rods 25 to slide inwards synchronously, thereby driving the two sets of clamping rods 26 and the two sets of clamping blocks 28 to slide inwards synchronously, thus clamping and fixing the two ends of the worm gear.

[0034] In addition, when machining worms of different diameters, the two sets of wedge blocks 283 are first slid on the surface of the clamping block 28, and the distance between the two sets of wedge blocks 283 is adjusted so that the upper and lower sets of wedge blocks 283 and the abutment plate 282 are all in contact with the surface of the worm. The two sets of clamping blocks 28 cooperate to keep the end of the worm fixed at six points, effectively improving the stability of the worm during the machining process.

[0035] See Figures 3 to 5 Two sets of linear guide rails 285 are fixedly connected between the inner top wall and inner bottom wall of the clamping block 28. A bidirectional lead screw 284 is provided between the two sets of linear guide rails 285. The lower end of the bidirectional lead screw 284 is rotatably connected to the inner bottom wall of the clamping block 28. A connecting seat 288 is fixedly connected to the upper end of the clamping block 28. An adjusting knob 289 is rotatably connected to the upper surface of the connecting seat 288. The adjusting knob 289 is fixedly connected to the upper end of the bidirectional lead screw 284 through a connecting shaft. A ratchet 28 is fixedly connected to the lower surface of the adjusting knob 289. 10. A pawl 2811 is provided on the upper surface of the connecting seat 288 at the side of the ratchet 2810. Two sets of upper and lower transmission blocks 286 are slidably connected between the two sets of linear guide rails 285. The middle part of the two sets of transmission blocks 286 is threaded to the upper and lower ends of the bidirectional lead screw 284, respectively. Limiting blocks 287 are fixedly connected to both ends of the two sets of transmission blocks 286. Two sets of limiting grooves 281 are opened on the opposite side surface of the two sets of clamping blocks 28. The limiting blocks 287 pass through the limiting grooves 281 and are fixedly connected to the wedge blocks 283.

[0036] Specifically, during the adjustment of the wedge block 283, the bidirectional lead screw 284 is rotated by rotating the adjustment knob 289. The bidirectional lead screw 284 cooperates with the two sets of linear guide rails 285 to drive the two sets of transmission blocks 286 to slide synchronously in opposite directions. At this time, the transmission blocks 286 cooperate with the limit block 287 to adjust the position of the two sets of wedge blocks 283.

[0037] When the adjusting knob 289 is turned clockwise, the pawl 2811 will lock the ratchet 2810 in the opposite direction. At this time, the ratchet 2810 cannot rotate, and the pawl 2811 needs to be turned outward. At this time, the adjusting knob 289 will drive the bidirectional lead screw 284 to rotate clockwise, which will in turn drive the two sets of transmission blocks 286 to slide and separate in opposite directions, thereby increasing the distance between the two sets of wedge blocks 283.

[0038] When the adjusting knob 289 is turned counterclockwise, the pawl 2811 returns to the direction of the ratchet 2810. At this time, the adjusting knob 289 can be turned directly, which in turn drives the bidirectional lead screw 284 to rotate counterclockwise, which in turn drives the two sets of transmission blocks 286 to slide closer to each other, thereby reducing the distance between the two sets of wedge blocks 283.

[0039] The working principle of this utility model is as follows: Two sets of clamping components 2 can slide synchronously in opposite directions on the surface of the processing base 1, and the distance between the two sets of clamping components 2 can be adjusted to accommodate worms of different lengths. At the same time, by sliding two sets of wedge blocks 283 on the surface of the clamping block 28 in opposite directions, the distance between the two sets of wedge blocks 283 can be adjusted, thereby accommodating worms of different diameters. Six-point fixation can be achieved for worms of different diameters, improving the stability of clamping worms of different diameters.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A fixture for machining a worm gear in an automotive steering system, comprising a machining base (1), characterized in that: The upper side of the processing base (1) is provided with two sets of opposing sliding clamping assemblies (2). The clamping assembly (2) includes a mounting plate (21), a hydraulic cylinder (22), a connecting block (23), a positioning sleeve (24), a positioning rod (25), a clamping rod (26), a transmission rod (27), and a clamping block (28). There are two sets of clamping blocks (28). Abutment plates (282) are fixedly connected to the middle position of the opposite side of the two sets of clamping blocks (28). The upper and lower sides of the abutment plates (282) are provided with wedge blocks (283) that can be adjusted up and down.

2. The worm gear machining and fixing fixture for an automotive steering system according to claim 1, characterized in that: The hydraulic cylinder (22) is fixedly installed on the side of the mounting plate (21). Connecting blocks (23) are fixedly connected to both the front and rear sides of the mounting plate (21). An inclined positioning sleeve (24) is fixedly connected to one end of each of the two sets of connecting blocks (23) away from the mounting plate (21). A positioning rod (25) is slidably connected inside the two sets of positioning sleeves (24).

3. The worm gear machining and fixing fixture for an automotive steering system according to claim 2, characterized in that: The two sets of positioning rods (25) are fixedly connected to a clamping rod (26) at one end that is close to each other. The two sets of clamping blocks (28) are fixedly connected to the ends of the two sets of clamping rods (26) that are away from the positioning rods (25). An inclined support block (29) is fixedly connected between the clamping block (28) and the clamping rod (26).

4. The worm gear machining and fixing fixture for an automotive steering system according to claim 1, characterized in that: Both sets of positioning rods (25) are rotatably connected to the clamping block (28) with transmission rods (27), and the ends of the two sets of transmission rods (27) away from the positioning rods (25) are rotatably connected to the piston rod in the hydraulic cylinder (22).

5. The worm gear machining and fixing fixture for an automotive steering system according to claim 1, characterized in that: Two sets of linear guides (285) are fixedly connected between the inner top wall and the inner bottom wall of the clamping block (28), and a bidirectional lead screw (284) is provided between the two sets of linear guides (285). The lower end of the bidirectional lead screw (284) is rotatably connected to the inner bottom wall of the clamping block (28).

6. The worm gear machining and fixing fixture for an automotive steering system according to claim 5, characterized in that: The upper end of the clamping block (28) is fixedly connected to a connecting seat (288), and the upper surface of the connecting seat (288) is rotatably connected to an adjusting knob (289). The adjusting knob (289) is fixedly connected to the upper end of the bidirectional lead screw (284) through a connecting shaft. The lower surface of the adjusting knob (289) is fixedly connected to a ratchet (2810), and a pawl (2811) is provided on the upper surface of the connecting seat (288) at the side of the ratchet (2810).

7. The worm gear machining and fixing fixture for an automotive steering system according to claim 5, characterized in that: Two sets of upper and lower transmission blocks (286) are slidably connected between the two sets of linear guides (285). The middle part of the two sets of transmission blocks (286) is threadedly connected to the upper and lower ends of the bidirectional lead screw (284). Limit blocks (287) are fixedly connected to both ends of the two sets of transmission blocks (286).

8. The worm gear machining and fixing fixture for an automotive steering system according to claim 7, characterized in that: Two sets of limiting grooves (281) are provided on the opposite side surface of the two sets of clamping blocks (28), and the limiting block (287) passes through the limiting groove (281) and is fixedly connected to the wedge block (283).

Images