Assembly fixture for servo shell end cover of automobile steering engine

Abstract

The utility model relates to the technical field of machinery, in particular to an assembly fixture for a servo shell end cover of an automobile steering engine, which comprises an upper plate, a guide post, a bottom plate, a pressure head seat, a tightening sleeve, a pressure head, a clamp and a shell seat, a vertical guide rail is mounted on each of two sides of the top of the bottom plate, and the upper plate is connected with the guide rails in a sliding manner; a pressure head seat is mounted in the center of the top of the upper plate, a pressure head at the bottom of the pressure head seat penetrates through the upper plate, a tightening sleeve sleeves the outer side of the lower part of the pressure head, the contact surface of the pressure head and the tightening sleeve is a conical surface, a plurality of avoiding grooves are formed in the outer surface of the pressure head, one end of each avoiding groove is communicated with a notch in the bottom of the pressure head, and the other end of each avoiding groove extends above the conical surface; a shell base is installed in the center of the top of the bottom plate. Compared with the prior art, the assembling requirement of the servo shell end cover of the automobile steering engine is met, the assembling precision is high, the quality is good, the universality is high, model changing is convenient, and the assembling efficiency of the servo shell end cover of the steering engine is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of machinery, in particular to an assembly fixture for a servo housing end cover of an automobile steering gear. Background Art

[0002] See also Figure 1 The servo unit 101 is a key component of the vehicle's steering gear. One end is connected to the motor unit 102, and the other end is connected to the steering gear itself. The servo unit 101 contains a worm gear reduction mechanism that transmits motor torque to the steering gear, reducing speed and increasing torque, providing power to the steering gear.

[0003] See also Figure 2 When assembling the servo unit 101, first install the worm 1011 into the servo housing 1012, then install the worm gear 1013 into the servo housing 1012, and finally press the end cover into the servo housing. Figure 3 When the end cover 1014 is pressed into the servo housing, the housing force-bearing surface 1015 is the bottom plane, and the end cover force-bearing surface 1016 is the bottom small plane. Figure 4 As shown, the end cover needs to be pressed into the servo housing in the vertical direction. Since the end cover is a plastic part and the servo housing is a metal part, in order to avoid the end cover from breaking and being installed improperly, the centering requirements of the press-fitting process are high.

[0004] The end cap seals the servo unit, and its assembly quality directly impacts the sealing of the steering gear, thereby affecting its performance and service life. Press-fitting the end cap places high demands on the bearing surface and direction. During the prototype development phase, with a wide variety of products and tight development cycles, specialized equipment is required for end cap assembly. This results in long manufacturing cycles, high costs, poor interoperability across multiple products, and high tooling changeover costs.

[0005] Therefore, it is necessary to design an assembly fixture for the servo housing end cover of the automobile steering gear, which has low cost and strong versatility and meets the assembly requirements for the servo housing end cover of the steering gear. Summary of the Invention

[0006] The purpose of the utility model is to overcome the deficiencies of the prior art and provide an assembly fixture for a servo housing end cover of an automobile steering gear, which has low cost and high versatility and meets the assembly requirements for the servo housing end cover of the steering gear.

[0007] In order to achieve the above-mentioned purpose, the utility model is an assembly fixture for the servo housing end cover of an automobile steering gear, comprising an upper plate, a guide column, a bottom plate, a pressure head seat, a tightening sleeve, a pressure head, a clamping pliers, and a housing seat. A vertically arranged guide rail is respectively installed on both sides of the top of the bottom plate, the guide rail passes through the upper plate, and the upper plate is slidably connected to the guide rail. A pressure head seat is installed at the top center of the upper plate, and the pressure head at the bottom of the pressure head seat passes through the upper plate. A tightening sleeve is provided on the lower outer side of the pressure head. The contact surface between the pressure head and the tightening sleeve is a conical surface. A plurality of avoidance grooves are provided on the outer surface of the pressure head. One end of the avoidance groove is connected to the notch at the bottom of the pressure head, and the other end of the avoidance groove extends to the top of the conical surface. A housing seat is installed at the top center of the bottom plate. A boss matching the inner ring of the bottom plane of the servo housing is provided in the center of the housing seat. A clamping pliers is respectively installed on both sides of the housing seat.

[0008] The notch matches the inner rib of the end cover.

[0009] The taper of the conical surface is 4°, and the weight of the tightening sleeve is 390g.

[0010] The pressure head seat and the upper plate are connected by pressure head seat bolts, and the pressure head and the pressure head seat are connected by pressure head bolts.

[0011] The guide rail and the base plate are connected by a guide rail seat, which is fixed to the base plate by a guide rail seat bolt. The lower end of the guide rail is inserted into the guide rail seat. The guide rail and the upper plate are connected by a sliding sleeve, which is arranged outside the guide rail and is fixed to the upper plate by a sliding sleeve bolt.

[0012] A limiting piece is installed on the upper end of the guide rail, and the limiting piece is fixed to the guide rail by using limiting piece bolts.

[0013] The bottom plate is provided with two positioning pins, which are inserted into the corresponding positioning holes of the shell seat, and the shell seat is fixed to the bottom plate by using shell seat bolts.

[0014] Two clamping clamp seats are arranged on the bottom plate, and the clamping clamps are fixed on the clamping clamp seats by clamping clamp bolts.

[0015] The upper plate is connected to the press.

[0016] Compared with the prior art, the utility model meets the assembly requirements of the servo housing end cover of the automobile steering gear, has high assembly precision, good quality, strong versatility, and convenient replacement, thereby improving the assembly efficiency of the servo housing end cover of the steering gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of a car steering gear.

[0018] Figure 2 The diagram below shows the assembly process of the servo unit.

[0019] Figure 3 Schematic diagram of the assembly process of the end cover.

[0020] Figure 4 Schematic diagram of the structure of the end cover.

[0021] Figure 5 It is a structural diagram of the present utility model.

[0022] Figure 6 This is an exploded view of the pressure head and the tightening sleeve of the utility model.

[0023] Figure 7 This is a schematic diagram of the tightening sleeve of the utility model moving upward.

[0024] Figure 8 This is a schematic diagram of the tightening sleeve of the utility model moving downward.

[0025] Figure 9 This is a schematic diagram of the positioning pin of the utility model.

[0026] Figure 10 This is a schematic diagram of the cooperation between the housing seat of the utility model and the bottom plane of the servo housing.

[0027] Figure 11 This is a diagram of the usage state of the utility model. DETAILED DESCRIPTION

[0028] The present invention will now be further described with reference to the accompanying drawings.

[0029] See also Figure 5 The utility model is an assembly fixture for the servo housing end cover of an automobile steering gear, comprising an upper plate, a guide column, a bottom plate, a pressure head seat, a tightening sleeve, a pressure head, a clamping pliers, and a housing seat. A vertical guide rail 6 is installed on both sides of the top of the bottom plate 9. The guide rail 6 passes through the upper plate 5, and the upper plate 5 is slidably connected to the guide rail 6. A pressure head seat 12 is installed at the top center of the upper plate 5. The pressure head 14 at the bottom of the pressure head seat 12 passes through the upper plate 5. A tightening sleeve 13 is provided on the outer side of the lower part of the pressure head 14. The contact surface between the pressure head 14 and the tightening sleeve 13 is a conical surface 131. A plurality of avoidance grooves 141 are provided on the outer surface of the pressure head 14. One end of the avoidance groove 141 is connected to the notch 142 at the bottom of the pressure head 14, and the notch 142 matches the inner rib 1017 of the end cover. The other end of the avoidance groove 141 extends to above the conical surface 131. A shell seat 19 is installed in the top center of the base plate 9. A boss 191 is provided in the center of the shell seat 19 to match the inner circle of the bottom plane of the servo shell 1012. A clamping clamp 15 is installed on both sides of the shell seat 19.

[0030] See also Figure 6The pressure head 14 and the two conical surfaces of the tightening sleeve 13 are tightly matched, and the avoidance groove 141 can shrink the diameter of the pressure head 14 to a certain extent. Figure 7 When the tightening sleeve 13 moves upward, the outer diameter of the pressure head 14 is larger, and the end cover 1014 can be easily placed at the bottom of the pressure head 14, and the inner rib 1017 of the end cover is located at the notch 142; Figure 8 When the tightening sleeve 13 moves downward, the outer diameter of the pressing head 14 is reduced, and the pressing head 14 automatically clamps the inner rib 1017 of the end cover to prevent the end cover 1014 from falling during press-fitting.

[0031] The tightening sleeve 13 and the pressure head 14 are specially designed to match the taper of the conical surface 131 and the weight of the tightening sleeve 13. The taper of the conical surface 131 is 4°, and the weight of the tightening sleeve 13 is 390g. The tightening sleeve 13 can use its own weight to enable the pressure head 14 to clamp the inner rib 1017 of the end cover.

[0032] The pressure head seat 12 and the upper plate 5 are connected by a pressure head seat bolt 10, and the pressure head 14 and the pressure head seat 12 are connected by a pressure head bolt 11. They can be easily disassembled and assembled. The pressure head 14 can be disassembled and replaced according to different servo housing end cover models. It has strong versatility and low replacement cost.

[0033] The guide rail 6 is connected to the base plate 9 by a guide rail seat 7, which is fixed to the base plate 9 by a guide rail seat bolt 8. The lower end of the guide rail 6 is inserted into the guide rail seat 7. The guide rail 6 is connected to the upper plate 5 by a sliding sleeve 4, which is mounted on the outside of the guide rail 6 and fixed to the upper plate 5 by a sliding sleeve bolt 3. The double guide rail ensures that the force applied to the end cover is in the vertical direction when it is press-fitted.

[0034] A limit plate 2 is installed at the upper end of the guide rail 6 , and the limit plate 2 is fixed to the guide rail 6 by a limit plate bolt 1 to prevent the sliding sleeve 4 from falling off the guide rail 6 .

[0035] See also Figure 9 Two locating pins 20 are provided on the base plate 9, and the locating pins 20 are inserted into the corresponding locating holes of the housing seat 19. The housing seat 19 is fixed to the base plate 9 with a housing seat bolt 18, which can ensure the centering of the end cover and the servo housing when the end cover is pressed. The housing seat bolt 18 can be easily disassembled and assembled, has strong versatility, and low replacement cost.

[0036] See also Figure 10 The inner circle of the bottom plane of the servo housing 1012 is tightly matched with the outer circle of the boss 191 of the housing seat 19, and the bottom plane of the servo housing 1012 is in contact with the top surface of the housing seat 19, ensuring that the positioning and force surface of the servo housing 1012 meet the requirements.

[0037] Two clamping clamp seats 17 are provided on the base plate 9, and the clamping clamp 15 is fixed on the clamping clamp seat 17 using clamping clamp bolts 16. After the servo housing 1012 is placed on the housing seat 19, the clamping clamp 15 can quickly clamp and release the servo housing 1012, and the operation is convenient.

[0038] The pressure head 14 and the housing seat 19 adopt a standardized design, and can be matched with the corresponding pressure head 14 and housing seat 19 according to different servo units. They are convenient to disassemble, assemble and replace, have strong versatility, low replacement cost, and reduce product trial production cost.

[0039] See also Figure 11 The present invention is in an upright position during use. First, manually move the tightening sleeve 13 upward, insert the end cap 1014 into the press head 14, then loosen the tightening sleeve 13, allowing it to naturally move downward. The press head 14 then automatically clamps the end cap 1014. The servo housing 1012 is placed on the housing seat 19 and secured with the clamp 15. The press is started, the upper plate 5 is connected to the press, and the end cap 1014 is press-fitted onto the servo housing 1012. Once press-fitting is complete, the press is stopped, the clamp is released, and the part is removed.

[0040] The utility model meets the assembly requirements of the servo housing end cover of the automobile steering gear, has high assembly precision, good quality, strong versatility, and convenient replacement, thereby improving the assembly efficiency of the servo housing end cover of the steering gear.

Claims

1. An assembly fixture for the servo housing end cover of an automobile steering gear, comprising an upper plate, a guide column, a bottom plate, a pressure head seat, a tightening sleeve, a pressure head, a clamping pliers, and a housing seat, characterized in that: A vertical guide rail (6) is installed on both sides of the top of the bottom plate (9), and the guide rail (6) passes through the upper plate (5). The upper plate (5) is slidably connected to the guide rail (6). A pressure head seat (12) is installed at the center of the top of the upper plate (5). The pressure head (14) at the bottom of the pressure head seat (12) passes through the upper plate (5). The lower outer side of the pressure head (14) is provided with a tightening sleeve (13). The contact surface between the pressure head (14) and the tightening sleeve (13) is a conical surface (131). The outer surface of the pressure head (14) is A plurality of avoidance grooves (141) are provided on the surface, one end of the avoidance groove (141) is connected to the notch (142) at the bottom of the pressure head (14), and the other end of the avoidance groove (141) extends to the top of the conical surface (131). A housing seat (19) is installed at the top center of the bottom plate (9), and a boss (191) matching the inner ring of the bottom plane of the servo housing (1012) is provided at the center of the housing seat (19). A clamping clamp (15) is installed on both sides of the housing seat (19).

2. The assembly fixture for the servo housing end cover of an automobile steering gear according to claim 1, characterized in that: The notch (142) matches the inner rib (1017) of the end cover.

3. The assembly fixture for the servo housing end cover of an automobile steering gear according to claim 1, characterized in that: The taper of the conical surface (131) is 4°, and the weight of the tightening sleeve (13) is 390 g.

4. The assembly fixture for the servo housing end cover of an automobile steering gear according to claim 1, characterized in that: The pressure head seat (12) and the upper plate (5) are connected by a pressure head seat bolt (10), and the pressure head (14) and the pressure head seat (12) are connected by a pressure head bolt (11).

5. The assembly fixture for the servo housing end cover of an automobile steering gear according to claim 1, characterized in that: The guide rail (6) and the base plate (9) are connected by a guide rail seat (7), the guide rail seat (7) is fixed to the base plate (9) by a guide rail seat bolt (8), the lower end of the guide rail (6) is inserted into the guide rail seat (7), the guide rail (6) and the upper plate (5) are connected by a sliding sleeve (4), the sliding sleeve (4) is set outside the guide rail (6), and the sliding sleeve (4) is fixed to the upper plate (5) by a sliding sleeve bolt (3).

6. The assembly fixture for the servo housing end cover of an automobile steering gear according to claim 1, characterized in that: A limiting plate (2) is installed at the upper end of the guide rail (6), and the limiting plate (2) is fixed to the guide rail (6) by using a limiting plate bolt (1).

7. The assembly fixture for the servo housing end cover of an automobile steering gear according to claim 1, characterized in that: The bottom plate (9) is provided with two positioning pins (20), which are inserted into corresponding positioning holes of the housing seat (19). The housing seat (19) is fixed to the bottom plate (9) by housing seat bolts (18).

8. The assembly fixture for the servo housing end cover of an automobile steering gear according to claim 1, characterized in that: Two clamping clamp seats (17) are provided on the base plate (9), and the clamping clamp (15) is fixed to the clamping clamp seat (17) by clamping clamp bolts (16).

9. The assembly fixture for the servo housing end cover of an automobile steering gear according to claim 1, characterized in that: The upper plate (5) is connected to the press.

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