An assembly quality detection and disassembly device for a car steering engine servo cover

Abstract

The utility model relates to a steering system technical field, concretely is a kind of assembly quality detection and disassembly device for automobile steering machine servo cover.The assembly quality detection and disassembly device for automobile steering machine servo cover is characterized by: the lower part of workbench skeleton is equipped with workbench face, workbench backboard is equipped on the workbench skeleton located at the rear side of workbench face, and the bottom of workbench skeleton is respectively connected with workbench foot;Servo unit sealing clamping mechanism is equipped on workbench face, air pressure adjusting mechanism is equipped on the workbench backboard located at the rear side of servo unit sealing clamping mechanism, and servo unit sealing clamping mechanism and air pressure adjusting mechanism are connected by air pipe;Start switch is equipped on the workbench face located at the front side of servo unit sealing clamping mechanism, and start switch protection cover is equipped on start switch.Compared with prior art, adjusting each component, the device can be applied to different types of products, improve the versatility of the invention, reduce cost.

Description

Technical Field

[0001] This utility model relates to the field of steering system technology, specifically to an assembly quality inspection and disassembly device for the servo cover of an automotive steering gear. Background Technology

[0002] The servo unit is a crucial component of the automotive steering system. Connected to the motor unit on one end and the steering system body on the other, it contains a worm gear reduction mechanism that transmits motor torque to the steering system, reducing speed and increasing torque to provide power steering assistance. Because the steering system is located low on the vehicle chassis, it operates in relatively harsh environments, frequently encountering rainy or flooded roads, thus requiring high levels of sealing.

[0003] The servo unit consists of components such as a worm gear, worm shaft, servo housing, servo cover, sealing ring, and gears. The worm shaft end of the servo unit connects to the motor, and the gear end connects to the steering gear body. High sealing performance is required at both ends. During the servo unit assembly process, installing the servo cover is the last step. The servo cover and servo housing are interference-fitted and sealed by a sealing ring. The installation quality directly affects the steering gear's sealing performance, thus impacting its function and lifespan. The servo cover and servo housing have different installation designs. The servo cover has four evenly distributed circumferential locking feet, while the servo housing has locking foot grooves. Due to structural reasons, these grooves are not closed loops. To ensure that each locking foot on the servo cover can engage with the groove on the housing, the servo cover must be installed at a specific angle to the housing. If the installation angle is off, the locking feet on the servo cover may break. Alternatively, the servo cover may not have circumferential locking feet, and there is no angle requirement for its installation to the housing. The press-fit force-bearing surface of the servo cover is a flat plane near its edge. To ensure even force distribution on the four retaining feet during press-fitting and to prevent breakage, the servo cover must be pressed vertically into the housing. Similarly, to prevent the sealing ring from cutting during press-fitting, the servo cover must also be pressed vertically into the housing. If the retaining feet break, the servo cover risks detaching, and fragments will accelerate the wear of the worm gear, leading to abnormal noise, reduced steering performance, or even steering failure. If the sealing ring is cut, the servo cover's sealing performance deteriorates, increasing the risk of water ingress into the servo unit and accelerating corrosion, similarly resulting in reduced steering performance or even steering failure.

[0004] The installation quality of the servo cover directly affects the sealing performance of the servo unit, thus impacting the performance and lifespan of the steering gear. Therefore, its assembly process requires strict adherence to specifications. Because the servo cover and servo housing fit tightly after press-fitting, it's difficult to visually detect broken retaining feet, making it challenging to inspect the press-fitting quality of the servo cover. Existing inspection methods include the immersion method, which involves placing the servo housing in water and observing for air bubbles around the servo cover. This method only checks for sealing and cannot detect broken retaining feet. Another method is X-ray detection, which uses X-rays to inspect the fit between the servo cover and servo housing. This method only checks the fit of the retaining feet and cannot detect the sealing performance of the servo cover. Furthermore, if disassembly, analysis, or rework of the servo unit is required, the servo cover's design and interference fit with the servo housing make disassembly difficult. Summary of the Invention

[0005] To overcome the shortcomings of the prior art, this utility model provides an assembly quality inspection and disassembly device for automotive steering gear servo covers. The device has a simple structure, low cost, and strong versatility, and meets the requirements for assembly quality inspection and disassembly of steering gear servo covers.

[0006] To achieve the above objectives, an assembly quality inspection and disassembly device for automotive steering gear servo covers is designed, comprising a workbench frame, a workbench surface, a workbench back plate, and workbench feet. The device is characterized by: a workbench surface at the lower part of the workbench frame; a workbench back plate on the workbench frame behind the workbench surface; and workbench feet connected to the bottom perimeter of the workbench frame. A servo unit sealing clamping mechanism is provided on the workbench surface; an air pressure regulating mechanism is provided on the workbench back plate behind the servo unit sealing clamping mechanism; the servo unit sealing clamping mechanism and the air pressure regulating mechanism are connected by an air pipe. A start switch is provided on the workbench surface in front of the servo unit sealing clamping mechanism, and a start switch protective cover is provided on the start switch.

[0007] The air pressure regulating mechanism includes an air pressure regulating mechanism connecting block, an air pressure regulating knob, a pressure holding time display, an air pressure display, and an air pressure regulating valve. The back of the air pressure regulating mechanism connecting block is connected to the back plate of the workbench, the front of the air pressure regulating mechanism connecting block is connected to the air pressure regulating valve, the air pressure regulating knob is connected to the top of the air pressure regulating valve, the air pressure display is connected to the front of the air pressure regulating valve, and a pressure holding time display is provided on one side of the air pressure regulating valve.

[0008] The servo unit sealing clamping mechanism includes a servo unit sealing clamping mechanism base, a servo unit pressing device, a servo unit inflatable base, and a servo unit sealing device. The bottom of the servo unit sealing clamping mechanism base is connected to the worktable surface by several bolts. A servo unit inflatable base is provided on the servo unit sealing clamping mechanism base. A servo unit pressing device is provided on the rear side of the servo unit inflatable base. A servo unit sealing device is provided on one side of the servo unit inflatable base.

[0009] The servo unit inflation base is a cylindrical structure with an air inlet on one side and an air outlet at the top center. A servo housing worm end sealing ring is fitted on the outer side of the top of the servo unit inflation base; the air inlet and the air outlet are connected.

[0010] The gas outlet of the pressure regulating valve is connected to one end of the air pipe, and the other end of the air pipe is connected to the air inlet on one side of the servo unit's inflation base.

[0011] The servo unit clamping device includes a servo unit clamping handle, a servo unit clamping handle seat, and a servo unit pressure head. The bottom of the servo unit clamping handle seat is connected to the base of the servo unit sealing clamping mechanism by several bolts. The top of the servo unit clamping handle seat is connected to the fixed end of the servo unit clamping handle, and the movable end of the servo unit clamping handle is connected to the servo unit pressure head.

[0012] The servo unit sealing device includes a servo housing gear end sealing ring, a servo unit gear end clamping handle, a servo unit gear end sealing sleeve, a connecting rod between the gear end clamping handle and the sealing sleeve, a servo unit gear end clamping handle seat, and a position adjustment mechanism seat. The bottom of the position adjustment mechanism seat is connected to the servo unit sealing clamping mechanism base by several bolts. One side of the top of the position adjustment mechanism seat is connected to one end of the servo unit gear end clamping handle seat by a locking bolt. The other end of the servo unit gear end clamping handle seat is connected to the fixed end of the servo unit gear end clamping handle by bolts. The movable end of the servo unit gear end clamping handle is connected to one end of the connecting rod between the gear end clamping handle and the sealing sleeve. The other end of the connecting rod between the gear end clamping handle and the sealing sleeve is connected to the bottom of the servo unit gear end sealing sleeve. The servo housing gear end sealing ring is provided on the inner top ring of the servo unit gear end sealing sleeve.

[0013] The servo unit gear end clamping handle seat is a structure composed of a rectangular panel and a connecting rod. The servo unit gear end clamping handle is connected to the rectangular panel of the servo unit gear end clamping handle seat, and the connecting rod of the servo unit gear end clamping handle seat is connected to the locking bolt.

[0014] The top of the position adjustment mechanism seat is L-shaped, and a locking bolt is connected to one side of the top of the position adjustment mechanism seat. The locking bolt is connected to the connecting rod of the servo unit gear end pressing handle seat.

[0015] Compared with the prior art, this utility model provides an assembly quality inspection and disassembly device for automotive steering gear servo covers. By replacing the servo unit inflation base and the servo unit gear end sealing sleeve, adjusting the position of the servo unit pressure head and the servo unit clamping handle seat, and adjusting the position of the servo unit gear end clamping handle seat and the position adjustment mechanism seat, the device can be applied to different types of products, improving the versatility of the invention and reducing costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the air pressure regulating mechanism in this utility model.

[0018] Figure 3 This is a schematic diagram of the servo unit sealing and clamping mechanism in this utility model.

[0019] Figure 4 This is a schematic diagram showing the connection between the air pressure regulating mechanism and the servo unit sealing clamping mechanism.

[0020] Figure 5 This is a schematic diagram showing the installation of the servo unit clamping device and the servo unit sealing device.

[0021] Figure 6 This is a schematic diagram showing the selection and installation of each component in this utility model.

[0022] Figure 7 This is a schematic diagram of the servo unit clamping state.

[0023] Figure 8 This is a schematic diagram of the servo unit in its sealed state.

[0024] Figure 9 A schematic diagram showing the servo unit in its inflation state. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] like Figures 1 to 4As shown, the lower part of the workbench frame 1 is provided with a workbench surface 6, and a workbench back plate 2 is provided on the workbench frame 1 behind the workbench surface 6. The bottom of the workbench frame 1 is connected to the workbench feet 7. A servo unit sealing clamping mechanism 5 is provided on the workbench surface 6, and an air pressure regulating mechanism 3 is provided on the workbench back plate 2 behind the servo unit sealing clamping mechanism 5. The servo unit sealing clamping mechanism 5 and the air pressure regulating mechanism 3 are connected by an air pipe 4. A start switch 9 is provided on the workbench surface 6 in front of the servo unit sealing clamping mechanism 5, and a start switch protective cover 8 is provided on the start switch 9.

[0027] The air pressure regulating mechanism 3 is connected to the servo unit sealing clamping mechanism 5 through the air pipe 4. The servo unit inflation base 19 is provided with an air inlet 25 and an air outlet 27.

[0028] The air pressure regulating mechanism 3 includes an air pressure regulating mechanism connecting block 21, an air pressure regulating knob, a pressure holding time display, an air pressure display, and an air pressure regulating valve. The back of the air pressure regulating mechanism connecting block 21 is connected to the workbench back plate 2, the front of the air pressure regulating mechanism connecting block 21 is connected to the air pressure regulating valve 18, the top of the air pressure regulating valve 18 is connected to the air pressure regulating knob 10, the front of the air pressure regulating valve 18 is connected to the air pressure display 12, and a pressure holding time display 11 is provided on one side of the air pressure regulating valve 18.

[0029] The pressure holding time display 11 can intuitively display the pressure holding time, suitable for the installation quality requirements and disassembly requirements of different servo cover models. The air pressure adjustment knob 10 can adjust the inflation air pressure, suitable for the installation quality requirements and disassembly requirements of different servo cover models. The air pressure display 12 can intuitively display the air pressure, facilitating air pressure adjustment via the air pressure adjustment knob.

[0030] The servo unit sealing clamping mechanism 5 includes a servo unit sealing clamping mechanism base, a servo unit pressing device, a servo unit inflation base, and a servo unit sealing device. The bottom of the servo unit sealing clamping mechanism base 20 is connected to the worktable surface 6 by several bolts. A servo unit inflation base 19 is provided on the servo unit sealing clamping mechanism base 20. A servo unit pressing device is provided on the rear side of the servo unit inflation base 19. A servo unit sealing device is provided on one side of the servo unit inflation base 19.

[0031] The servo unit inflation base 19 has a cylindrical structure. An air inlet 25 is provided on one side of the servo unit inflation base 19, and an air outlet 27 is provided at the center of the top of the servo unit inflation base 19. A servo housing worm end sealing ring 17 is fitted on the outer side of the top of the servo unit inflation base 19. The air inlet 25 and the air outlet 27 are connected.

[0032] The outer diameter of the servo housing worm end sealing ring 17 on the servo unit inflation base 19 is designed according to the inner diameter of the servo unit worm end housing, and can fit tightly with it. When the servo unit is pressed against the servo unit inflation base 19, a good sealing effect is achieved.

[0033] The gas outlet of the air pressure regulating valve 18 is connected to one end of the air pipe 4, and the other end of the air pipe 4 is connected to the air inlet 25 on one side of the servo unit inflation base 19.

[0034] The servo unit clamping device includes a servo unit clamping handle, a servo unit clamping handle seat, and a servo unit clamping head. The bottom of the servo unit clamping handle seat 14 is connected to the servo unit sealing clamping mechanism base 20 by several bolts. The top of the servo unit clamping handle seat 14 is connected to the fixed end of the servo unit clamping handle 13, and the movable end of the servo unit clamping handle 13 is connected to the servo unit clamping head 15.

[0035] The servo unit pressure head 15 is mounted on the servo unit clamping handle 13, and its position can be adjusted up and down and locked. The servo unit clamping handle seat 14 is mounted on the servo unit sealing clamping mechanism base 20, and has a waist-shaped hole at the bottom, which can be adjusted back and forth and locked.

[0036] The servo unit sealing device includes a servo housing gear end sealing ring, a servo unit gear end clamping handle, a servo unit gear end sealing sleeve, a connecting rod between the gear end clamping handle and the sealing sleeve, a servo unit gear end clamping handle seat, and a position adjustment mechanism seat. The bottom of the position adjustment mechanism seat 28 is connected to the servo unit sealing clamping mechanism base 20 by several bolts. One side of the top of the position adjustment mechanism seat 28 is connected to one end of the servo unit gear end clamping handle seat 26 by a locking bolt. The other end of the servo unit gear end clamping handle seat 26 is connected to the fixed end of the servo unit gear end clamping handle 22 by bolts. The movable end of the servo unit gear end clamping handle 22 is connected to one end of the connecting rod 24 between the gear end clamping handle and the sealing sleeve. The other end of the connecting rod 24 between the gear end clamping handle and the sealing sleeve is connected to the bottom of the servo unit gear end sealing sleeve 23. The servo housing gear end sealing ring 16 is provided on the inner top ring of the servo unit gear end sealing sleeve 23.

[0037] The position adjustment mechanism seat 28 is mounted on the servo unit sealing clamping mechanism base 20. It has a waist-shaped hole at the bottom, which can be adjusted back and forth and locked.

[0038] The servo unit gear end sealing sleeve 23 is equipped with a servo housing gear end sealing ring 16. The inner diameter of the servo unit gear end sealing sleeve 23 is designed according to the outer diameter of the servo unit gear end housing, and can fit tightly with it. When the servo unit gear end sealing sleeve 23 presses against the servo unit gear end, a good sealing effect is achieved.

[0039] The servo unit gear end clamping handle seat 26 is a structure composed of a rectangular panel and a connecting rod. The servo unit gear end clamping handle 22 is connected to the rectangular panel of the servo unit gear end clamping handle seat 26, and the connecting rod of the servo unit gear end clamping handle seat 26 is connected to the locking bolt.

[0040] The servo unit gear end sealing sleeve 23 is mounted on the gear end clamping handle and the sealing sleeve connecting rod 24, and can be easily replaced according to different servo unit models. The servo unit inflation base 19 is mounted on the servo unit sealing clamping mechanism base 20, and can be easily replaced according to different servo unit models.

[0041] The top of the position adjustment mechanism seat 28 has an L-shaped structure. A locking bolt is connected to one side of the top of the position adjustment mechanism seat 28. The locking bolt is connected to the connecting rod of the servo unit gear end pressing handle seat 26.

[0042] The servo unit gear end clamping handle seat 26 is locked to the position adjustment mechanism seat 28 by locking bolts, and the position can be adjusted axially and circumferentially and locked.

[0043] The worm gear end of the servo unit is sealed to the servo unit inflation base 19, and the gear end of the servo unit is sealed to the servo unit gear end sleeve 23. The servo unit pressure head 15 presses the servo unit tightly, at which point the servo unit is in a sealed state. When inflation and pressure holding are performed through the air inlet 25, the servo cover tends to come off outward due to the air pressure. The installation and sealing quality of the servo cover can be indirectly detected by setting the air pressure and the pressure holding time. By continuing to adjust the atmospheric pressure, the servo cover can be pushed out of the servo housing, achieving the purpose of disassembly.

[0044] The usage process of this utility model is as follows: 1. For example Figure 6 As shown, select the servo unit gear end sealing sleeve according to the servo unit model and install it on the connecting rod between the gear end clamping handle and the sealing sleeve. Select the servo unit inflation base and install it on the servo unit sealing clamping mechanism base.

[0045] 2. For example Figure 7 As shown, adjust and lock the positions of the servo unit pressure head and servo unit clamping handle seat according to the servo unit model, and adjust and lock the positions of the servo unit gear end clamping handle seat and position adjustment mechanism seat.

[0046] 3. Adjust the air pressure knob to the specified air pressure according to the model and requirements of the servo unit.

[0047] 4. For example Figure 8 As shown, place the servo unit into the main fixture, and operate the servo unit clamping handle and the servo unit gear end clamping handle to clamp and seal the servo unit.

[0048] 5. Turn on the switch to inflate the servo unit and observe the pressure holding time. If the servo cover does not come off or leak air within the specified time, it indicates that the servo cover installation quality is qualified.

[0049] 6. For example Figure 9 As shown, if it is necessary to disassemble the servo cover, increase the air pressure until the servo cover comes off.

[0050] 7. After the operation is complete, turn off the switch and remove the servo housing.

[0051] By replacing the servo unit inflation base and the servo unit gear end sealing sleeve, adjusting the position of the servo unit pressure head and the servo unit clamping handle seat, and adjusting the position of the servo unit gear end clamping handle seat and the position adjustment mechanism seat, this invention can be applied to different types of products, improving its versatility and reducing costs.

[0052] This utility model has a simple structure, convenient operation, simple tooling structure, and convenient product installation and disassembly, which effectively improves the assembly quality inspection and disassembly efficiency of the servo cover.

[0053] This utility model primarily applies for protection of a method and fixture for inspecting and disassembling the assembly quality of the servo cover of an automotive steering gear. Its scope of protection is not limited to the inspection and disassembly of the servo cover of an automotive steering gear; other inspection and disassembly methods and fixtures with similar applications are also within the scope of protection.

Claims

1. An assembly quality inspection and disassembly device for an automotive steering gear servo cover, comprising a workbench frame, a workbench surface, a workbench back plate, and workbench feet, characterized in that: The workbench frame (1) has a workbench surface (6) at the bottom and a workbench back plate (2) on the workbench frame (1) behind the workbench surface (6). The bottom of the workbench frame (1) is connected to the workbench feet (7). The workbench surface (6) has a servo unit sealing clamping mechanism (5). The workbench back plate (2) behind the servo unit sealing clamping mechanism (5) has an air pressure regulating mechanism (3). The servo unit sealing clamping mechanism (5) and the air pressure regulating mechanism (3) are connected by an air pipe (4). The workbench surface (6) in front of the servo unit sealing clamping mechanism (5) has a start switch (9). The start switch (9) has a start switch protective cover (8).

2. The assembly quality inspection and disassembly device for an automotive steering gear servo cover according to claim 1, characterized in that: The air pressure regulating mechanism (3) includes an air pressure regulating mechanism connecting block, an air pressure regulating knob, a pressure holding time display, an air pressure display, and an air pressure regulating valve. The back of the air pressure regulating mechanism connecting block (21) is connected to the back plate (2) of the workbench. The front of the air pressure regulating mechanism connecting block (21) is connected to the air pressure regulating valve (18). The air pressure regulating knob (10) is connected to the top of the air pressure regulating valve (18). The air pressure display (12) is connected to the front of the air pressure regulating valve (18). A pressure holding time display (11) is provided on one side of the air pressure regulating valve (18).

3. The assembly quality inspection and disassembly device for an automotive steering gear servo cover according to claim 1, characterized in that: The servo unit sealing clamping mechanism (5) includes a servo unit sealing clamping mechanism base, a servo unit pressing device, a servo unit inflation base, and a servo unit sealing device. The bottom of the servo unit sealing clamping mechanism base (20) is connected to the worktable surface (6) by several bolts. A servo unit inflation base (19) is provided on the servo unit sealing clamping mechanism base (20). A servo unit pressing device is provided on the rear side of the servo unit inflation base (19). A servo unit sealing device is provided on one side of the servo unit inflation base (19).

4. The assembly quality inspection and disassembly device for an automotive steering gear servo cover according to claim 3, characterized in that: The servo unit inflation base (19) is a cylindrical structure. An air inlet (25) is provided on one side of the servo unit inflation base (19), and an air outlet (27) is provided at the center of the top of the servo unit inflation base (19). A servo housing worm end sealing ring (17) is fitted on the outer side of the top of the servo unit inflation base (19). The air inlet (25) and the air outlet (27) are connected.

5. The assembly quality inspection and disassembly device for an automotive steering gear servo cover according to claim 2, characterized in that: The gas outlet of the pressure regulating valve (18) is connected to one end of the air pipe (4), and the other end of the air pipe (4) is connected to the air inlet (25) on one side of the servo unit inflation base (19).

6. The assembly quality inspection and disassembly device for an automotive steering gear servo cover according to claim 3, characterized in that: The servo unit clamping device includes a servo unit clamping handle, a servo unit clamping handle seat, and a servo unit clamping head. The bottom of the servo unit clamping handle seat (14) is connected to the servo unit sealing clamping mechanism base (20) by several bolts. The top of the servo unit clamping handle seat (14) is connected to the fixed end of the servo unit clamping handle (13), and the movable end of the servo unit clamping handle (13) is connected to the servo unit clamping head (15).

7. The assembly quality inspection and disassembly device for an automotive steering gear servo cover according to claim 3, characterized in that: The servo unit sealing device includes a servo housing gear end sealing ring, a servo unit gear end clamping handle, a servo unit gear end sealing sleeve, a connecting rod between the gear end clamping handle and the sealing sleeve, a servo unit gear end clamping handle seat, and a position adjustment mechanism seat. The bottom of the position adjustment mechanism seat (28) is connected to the servo unit sealing clamping mechanism base (20) by several bolts. One side of the top of the position adjustment mechanism seat (28) is connected to one end of the servo unit gear end clamping handle seat (26) by a locking bolt. The other end of the servo unit gear end clamping handle seat (26) is connected to the fixed end of the servo unit gear end clamping handle (22) by a bolt. The movable end of the servo unit gear end clamping handle (22) is connected to one end of the connecting rod between the gear end clamping handle and the sealing sleeve (24). The other end of the connecting rod between the gear end clamping handle and the sealing sleeve (24) is connected to the bottom of the servo unit gear end sealing sleeve (23). The servo housing gear end sealing ring (16) is provided on the inner top ring of the servo unit gear end sealing sleeve (23).

8. The assembly quality inspection and disassembly device for an automotive steering gear servo cover according to claim 7, characterized in that: The servo unit gear end clamping handle seat (26) is a structure composed of a rectangular panel and a connecting rod. The servo unit gear end clamping handle (22) is connected to the rectangular panel of the servo unit gear end clamping handle seat (26). The connecting rod of the servo unit gear end clamping handle seat (26) is connected to the locking bolt.

9. The assembly quality inspection and disassembly device for an automotive steering gear servo cover according to claim 7, characterized in that: The top of the position adjustment mechanism seat (28) is an L-shaped structure. A locking bolt is connected to one side of the top of the position adjustment mechanism seat (28). The locking bolt is connected to the connecting rod of the servo unit gear end pressing handle seat (26).

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