A rack bushing assembly device for a steering gear housing

Abstract

The utility model discloses a kind of automobile steering gear housing rack bushing assembly devices, including machine table, shell positioning mechanism and bushing positioning mechanism are equipped on the machine table, the placement position of the bushing positioning mechanism is with the bushing mounting position in the shell after positioning of the shell positioning mechanism on same translation axis, the upper portion of the machine table is equipped with bushing clamping translation mechanism, the maximum distance of the opposite side after the contraction of the two clamping jaws of the bushing clamping translation mechanism is less than the diameter of bushing mounting mouth, the upper portion of the clamping range of two clamping jaws is equipped with lifting limit resistance rod, and the diameter is less than the diameter of bushing mounting mouth. The utility model can replace manpower to install rack bushing, reduce manpower consumption, effectively improve installation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of steering gear manufacturing technology, specifically to an assembly device for a car steering gear housing rack bushing. Background Technology

[0002] The car steering gear is one of the core components of the vehicle steering system. It is responsible for transmitting the steering torque and angle applied by the driver through the steering wheel to the wheels, thereby achieving vehicle steering control.

[0003] The steering gear housing is the outer shell that protects the internal mechanical structure of the steering gear. For example... Figure 1 As shown, one end of the steering gear housing is provided with a mounting base 14, which has a port 15 and a shaft hole 16 for connecting other components, and the other end is provided with a rack bushing mounting port (referred to as bushing mounting port 17).

[0004] The rack bushing (referred to as bushing 18) is an important component of the steering gear housing. It is a deformable semi-circular plastic part, usually made of nylon, polyoxymethylene (POM) or composite materials, which wraps around the non-tooth side of the rack to support the rack and reduce friction with the housing.

[0005] During the production of automotive steering gear housings, bushing 18 needs to be installed into the bushing mounting opening 17 of the housing. If a pressing tool is used directly for pressing, the rack bushing is easily damaged or even broken. Therefore, manual installation is currently generally used. The operator needs to use tools (such as a small pry bar) to adjust the position of the bushing and gradually squeeze it completely into the mounting opening. The installation speed is slow, the labor consumption is high, and it is not conducive to industrial production. Utility Model Content

[0006] The purpose of this utility model is to provide an assembly device for the rack bushing of an automotive steering gear housing, which can replace manual labor in installing the rack bushing, reduce labor consumption, and effectively improve installation efficiency.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an assembly device for a car steering gear housing rack bushing, comprising a machine base, wherein the machine base is provided with a housing positioning mechanism and a bushing positioning mechanism, wherein the placement position of the bushing positioning mechanism and the bushing installation position inside the housing after positioning by the housing positioning mechanism are on the same translation axis, wherein a bushing clamping and translation mechanism is provided above the machine base, wherein the maximum distance between the opposite sides of the two clamping jaws of the bushing clamping and translation mechanism after retraction is less than the diameter of the bushing installation opening, and a lifting limit stop bar with a diameter smaller than the diameter of the bushing installation opening is provided above the clamping range of the two jaws.

[0008] A further improvement of this utility model is that the housing positioning mechanism includes a port positioning boss and a shaft hole positioning boss disposed on the machine base for cooperating with the port and shaft hole of the housing mounting base, and at least two rotary pressing cylinders, wherein the pressing end of the rotary pressing cylinder can contact the upper end surface of the housing mounting base.

[0009] A further improvement of this utility model is that the bushing positioning mechanism includes a bracket, the top plate of the bracket is provided with a semi-circular slot that mates with the bushing, the semi-circular slot forms a placement position, and a positioning groove that mates with the bushing protrusion is provided on one side of the semi-circular slot.

[0010] A further improvement of this utility model is that the bushing clamping and translation mechanism includes a lateral moving component, a lifting component is provided on the moving end of the lateral moving component, a lifting limit rod and a gripper cylinder are provided on the lifting end of the lifting component, and the gripper is disposed on the working end of the gripper cylinder.

[0011] A further improvement of this utility model is that the gripper is an arc plate, which is connected to the working end of the gripper cylinder by a connector, and the curvature of the arc plate is adapted to the outer diameter of the bushing.

[0012] A further improvement of this utility model is that there is a height difference between the placement position of the bushing positioning mechanism and the bushing installation position inside the housing after the housing positioning mechanism is positioned.

[0013] A further improvement of this utility model is that the lower end face of the lifting limit rod is provided with a truncated cone.

[0014] The beneficial effects of this utility model are as follows:

[0015] This invention, through the cooperation of a housing positioning mechanism, a bushing positioning mechanism, and a bushing clamping and translation mechanism, can replace manual labor in installing rack bushings, reducing labor consumption and effectively improving installation efficiency.

[0016] The bushing positioning mechanism of this invention has its placement position on the same translation axis as the bushing installation position inside the housing after the housing positioning mechanism has been positioned. This simplifies the movement trajectory of the bushing clamping translation mechanism, requiring only lifting and linear movement, eliminating the need for complex rotational alignment and improving installation efficiency.

[0017] The bushing clamping and translation mechanism of this utility model uses two grippers to clamp and move the bushing above the housing. When clamping the bushing, the grippers use radial compression force to cause it to undergo controllable elastic deformation. After deformation, the bushing diameter is dynamically adjusted to the allowable range of the installation opening. Then, it is kept in a compressed state to complete the embedded installation. The installation is achieved by utilizing the deformable characteristics of the bushing, and the installation speed is fast. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the steering gear housing structure in the prior art.

[0019] Figure 2 This is a schematic diagram of a rack and pinion bushing structure in the prior art.

[0020] Figure 3 This is a schematic diagram of the structure of the present invention (the steering gear housing and rack bushing are shown in the figure).

[0021] Figure 4 This is a schematic diagram of the structure of this utility model.

[0022] Figure 5 This is a schematic diagram of the housing positioning mechanism of this utility model.

[0023] Figure 6 This is a schematic diagram of the bushing positioning mechanism of this utility model.

[0024] Figure 7 This is a schematic diagram of the bushing clamping and translation mechanism of this utility model.

[0025] In the diagram, 1-machine base, 2-gripper, 3-lifting limit stop, 4-port positioning boss, 5-shaft hole positioning boss, 6-rotary pressing cylinder, 7-bracket, 8-semi-circular slot, 9-positioning groove, 10-lateral movement assembly, 11-lifting assembly, 12-gripper cylinder, 13-cone, 14-mounting base, 15-port, 16-shaft hole, 17-bulb mounting port, 18-rack bushing, 19-bulb protrusion. Detailed Implementation

[0026] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0027] Example 1: Combination Figures 1-7 It is known that an automotive steering gear housing rack bushing assembly device includes a machine base 1, on which a housing positioning mechanism and a bushing positioning mechanism are provided. The placement position of the bushing positioning mechanism and the bushing installation position inside the housing after positioning by the housing positioning mechanism are on the same translation axis. A bushing clamping and translation mechanism is provided above the machine base 1. The maximum distance between the opposite sides of the two grippers 2 of the bushing clamping and translation mechanism after retraction is less than the diameter of the bushing installation opening. A lifting limit stop bar 3 with a diameter smaller than the diameter of the bushing installation opening is provided above the clamping range of the two grippers 2.

[0028] After the two grippers 2 hold the bushing, they can retract to slightly deform the bushing, making it easier to insert into the bushing mounting opening. Preferably, the diameter of the lifting limit rod 3 is larger than the inner distance between the two ends of the deformed bushing, ensuring that it can both extend into the bushing mounting opening and effectively limit the bushing. Preferably, the lower end face of the lifting limit rod 3 is provided with a truncated cone 13.

[0029] The housing positioning mechanism includes a port positioning boss 4 and a shaft hole positioning boss 5 mounted on the machine base 1 for engaging with the port and shaft hole of the housing mounting seat, and at least two rotary pressing cylinders 6. The pressing end of the rotary pressing cylinder 6 can contact the upper end surface of the housing mounting seat. The rotary pressing cylinder is a conventional cylinder in the prior art capable of rotating the telescopic shaft. A horizontal plate is fixedly provided on the telescopic end of the cylinder, and a pressing block is provided on the horizontal plate that contacts the upper end surface of the housing mounting seat.

[0030] The bushing positioning mechanism includes a bracket 7. The top plate of the bracket 7 is provided with a semi-circular slot 8 that mates with the bushing. The semi-circular slot 8 forms a placement position. A positioning groove 9 that mates with the bushing protrusion is provided on one side of the semi-circular slot 8.

[0031] The bushing clamping and translation mechanism includes a lateral moving component 10. The moving end of the lateral moving component 10 is provided with a lifting component 11. The lifting end of the lifting component 11 is provided with a lifting limit rod 3 and a gripper cylinder 12. The gripper 2 is located on the working end of the gripper cylinder 12.

[0032] The bushing clamping and translation mechanism includes a support frame, and the lateral movement component includes a lateral slide rail mounted on the support frame and a lateral slide block slidably connected to the lateral slide rail. A first driving member is provided on one side of the lateral slide block to drive its movement, and a lifting component is mounted on the lateral slide block.

[0033] The lifting assembly includes a vertical slide rail mounted on a horizontal slide block and a vertical slide block slidably connected to the vertical slide rail. A second driving component is provided on one side of the vertical slide block to drive its movement. A gripper cylinder is mounted on the vertical slide block via a mounting plate. Preferably, both the first and second driving components are telescopic rods.

[0034] The lifting limit stop includes a limit cylinder mounted on a vertical slide block. The telescopic end of the limit cylinder points vertically downward and has a stop above the gripping range of the two grippers.

[0035] See Figure 1 The existing steering gear housing has a bushing mounting port 17 at one end. The inner wall of the bushing mounting port 17 has an annular groove for accommodating the rack bushing 18, and the end face of the bushing mounting port 17 has a notch for avoiding the bushing protrusion 19. The notch communicates with the annular groove. When the rack bushing is installed, it is located in the annular groove and the bushing protrusion on it is located in the notch. In use, the bushing is clamped and then passed through the bushing mounting port 17 along the notch, and then the bushing is installed into the annular groove.

[0036] The gripper 2 is an arc plate, which is connected to the working end of the gripper cylinder 12 through a connector. The curvature of the arc plate is adapted to the outer diameter of the bushing.

[0037] Optionally, there is a height difference between the placement position of the bushing positioning mechanism and the bushing installation position inside the housing after the housing positioning mechanism has been positioned.

[0038] The working principle of the automotive steering gear housing rack bushing assembly device provided by the utility model is as follows: In use, the steering gear housing is placed vertically. Positioning is achieved by the port 15 and shaft hole 16 on its mounting base 14 engaging with the port positioning boss 4 and shaft hole positioning boss 5 on the machine tool. Then, the rotary pressing cylinder 6 is activated to clamp and fix the mounting base 14. The bushing is placed into the semi-circular ring slot 8, and positioning is achieved by the bushing protrusion 19 engaging with the positioning groove 9. The bushing clamping and translation mechanism is activated, and the lifting assembly 11 descends, causing the gripper 2 to descend and... The bushing is clamped and then raised to a safe height to avoid interference with the housing. It is then moved horizontally to directly above the bushing mounting opening 17. The clamping jaws 2 then further clamp the bushing, causing it to undergo controllable elastic deformation. After deformation, the bushing diameter is dynamically adjusted to the allowable range of the mounting opening. The clamping jaws 2 then descend and move the bushing to the mounting position within the bushing mounting opening 17. Subsequently, the lifting limit rod 3 descends and contacts the bushing, restricting the upward movement of the bushing. Then, the clamping jaws 2 release and move upward. After losing the clamping restriction of the clamping jaws 2, the bushing returns to its original shape and enters the annular groove of the bushing mounting opening 17, completing its installation.

[0039] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A device for assembling a rack and pinion bushing for an automotive steering gear housing, characterized in that: The machine includes a machine base (1), on which a housing positioning mechanism and a bushing positioning mechanism are provided. The placement position of the bushing positioning mechanism and the bushing installation position inside the housing after positioning by the housing positioning mechanism are on the same translation axis. A bushing clamping translation mechanism is provided above the machine base (1). The maximum distance between the opposite sides of the two jaws (2) of the bushing clamping translation mechanism after retraction is less than the diameter of the bushing installation opening. A lifting limit rod (3) with a diameter smaller than the diameter of the bushing installation opening is provided above the clamping range of the two jaws (2).

2. The automotive steering gear housing rack bushing assembly device according to claim 1, characterized in that: The housing positioning mechanism includes a port positioning boss (4) and a shaft hole positioning boss (5) provided on the machine base (1) for cooperating with the port and shaft hole of the housing mounting seat, and at least two rotary pressing cylinders (6), the pressing end of the rotary pressing cylinders (6) being able to contact the upper end surface of the housing mounting seat.

3. The automotive steering gear housing rack bushing assembly device according to claim 1 or 2, characterized in that: The bushing positioning mechanism includes a bracket (7), and a semi-circular slot (8) that mates with the bushing is provided on the top plate of the bracket (7). The semi-circular slot (8) forms a placement position, and a positioning groove (9) that mates with the bushing protrusion is provided on one side of the semi-circular slot (8).

4. A car steering gear housing rack bushing assembly device according to claim 1 or 2, characterized in that: The bushing clamping and translation mechanism includes a lateral moving component (10), and a lifting component (11) is provided on the moving end of the lateral moving component (10). The lifting component (11) is provided with the lifting limit rod (3) and the gripper cylinder (12) on the lifting end. The gripper (2) is located on the working end of the gripper cylinder (12).

5. The automotive steering gear housing rack bushing assembly device according to claim 4, characterized in that: The gripper (2) is an arc plate, which is connected to the working end of the gripper cylinder (12) by a connector. The arc of the arc plate is adapted to the outer diameter of the bushing.

6. The automotive steering gear housing rack bushing assembly device according to claim 1, characterized in that: There is a height difference between the placement position of the bushing positioning mechanism and the bushing installation position inside the housing after the housing positioning mechanism has been positioned.

7. The automotive steering gear housing rack bushing assembly device according to claim 1, characterized in that: The lower end face of the lifting limit rod (3) is provided with a truncated cone (13).

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