Novel rack supporting block structure of rack-and-pinion steering gear
By introducing rubber shock absorbing sleeves and wear-resistant layers into the rack support block structure of the rack type steering gear, the problem that the traditional rack support block structure cannot effectively slow down impact noise is solved, and better buffering effect and driving comfort are achieved.
Patent Information
- Application Number
- CN202422072256.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-26
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-08-26
AI Technical Summary
The rack support block structure of traditional rack-and-pin steering gear relies only on a simple 'O' type sealing ring to slow down impact noise, which is not effective, resulting in obvious abnormal noise during bumps, affecting the driver's driving comfort.
A new type of rack support block structure of a rack-and-pin type steering gear is adopted, including a rack support block body and a rubber shock absorbing sleeve. The right end of the rack support block body is equipped with a arc groove matching the rack profile, and a layer of wear-resistant layer isolating racks in the arc groove. The rubber shock absorbing sleeve is tightly mounted on the rack support block body, and the left edge exceeds the left end face of the rack support block body and resists the adjustment screw, thereby forming a shock absorption and noise reduction zone that reduces the impact noise of the parts.
By introducing rubber shock absorbing sleeves and wear-resistant layers into the rack support block structure, the cushioning effect is significantly improved, impact noise is reduced, and driver's driving comfort is improved.
Smart Images
Figure CN222663556U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of rack and pinion steering gears, and in particular relates to a novel rack support block structure of a rack and pinion steering gear. Background Art
[0002] When the car is turning or passing through bumpy roads, the rack will be subjected to force, which will drive the rack support block structure to collide with the housing and the adjustment screw plug, generating impact noise. The rack support block structure of the traditional gear rack steering gear consists of a rack support block base and two circles of "O"-shaped sealing rings spaced along the rack support block base. The rack force of current new energy vehicles is increasing day by day. Relying on a simple "O"-shaped sealing ring to reduce the impact noise is not obvious and can no longer meet the design requirements. The abnormal noise phenomenon will be very obvious when the car is changing direction or passing through bumpy roads, which directly affects the driving comfort of the driver. Utility Model Content
[0003] The utility model aims to provide a novel rack support block structure of a gear rack type steering gear, which has a good effect of reducing impact noise and improving driving comfort, and solves the problem that the current rack support block structure only relies on a simple "O"-shaped sealing ring to reduce impact noise, resulting in obvious abnormal noise during bumps, affecting the driving comfort of the driver.
[0004] To this end, the technical solution adopted by the utility model is: a new rack support block structure of a gear rack steering gear, including a rack support block body and a rubber shock-absorbing sleeve, the right end of the rack support block body is provided with an arc groove matching the rack profile, a wear-resistant layer is provided in the groove of the arc groove for isolating the rack, the rubber shock-absorbing sleeve is tightly fitted on the rack support block body, the left end edge of the rubber shock-absorbing sleeve exceeds the left end surface of the rack support block body and abuts against the adjusting screw plug, thereby forming a shock-absorbing and noise-reducing zone between the rack support block body and the housing and the adjusting screw plug to reduce the impact noise of the parts.
[0005] As a preferred embodiment of the above scheme, a spring mounting groove is provided in the center of the left end of the rack support block body, and the spring mounting groove is equipped with a spring. The left end of the spring abuts against the vertical plane of the right end of the adjusting screw plug, thereby effectively avoiding the shaking of the rack support block body, and the design structure is reasonable.
[0006] It is further preferred that the left edge of the rubber shock-absorbing sleeve protrudes from the left end surface of the rack support block body by 0.1mm to 0.5mm, and the size is reasonable to avoid the left edge of the rubber shock-absorbing sleeve protruding too much, resulting in too much internal gap of the parts, easy shaking, and unstable structural installation. The left edge of the rubber shock-absorbing sleeve protrudes too little, which will inevitably cause abnormal noise due to collision of the adjustment screw plug.
[0007] More preferably, the rubber shock-absorbing sleeve is made of NBR material, which has good thermal stability, can maintain its stability at high temperatures, and also has good processing performance and wear resistance, and the material selection is reasonable.
[0008] More preferably, the rubber shock-absorbing sleeve has a hardness of 50A to 90A, which is reasonable and ensures the shock-absorbing and noise-reducing effects.
[0009] Further preferably, a clearance fit is adopted between the rubber shock-absorbing sleeve and the housing, and the clearance value is 0.02 mm to 0.2 mm, thereby increasing a slight movable space and avoiding interference fit affecting the service life of the parts.
[0010] The beneficial effects of the utility model are as follows: compared with the current rack support block structure which only relies on a simple "O"-ring to reduce impact noise, the present solution tightly fits a rubber shock-absorbing sleeve on the rack support block body, and sets a wear-resistant layer between the right end of the rack support block body and the rack, thereby achieving isolation between the right end of the rack support block body and the rack; the left end edge of the rubber shock-absorbing sleeve exceeds the left end face of the rack support block body and abuts against the adjusting screw plug, thereby isolating the circumferential surface and the left end face of the rack support block body, and the rubber shock-absorbing sleeve is tightly fitted around the circumference, effectively increasing the contact area and significantly improving the buffering effect, and isolation, shock absorption and noise reduction measures are provided between the rack support block body and the housing, the adjusting screw plug and the rack, thereby effectively avoiding the occurrence of direct collision between the rack support block body and surrounding components to produce large abnormal noises.
[0011] In a word, it has the advantages of reducing the impact force from the adjusting screw plug and the housing, reducing abnormal noise, improving the driving comfort of the driver, and having a clever design. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of the installation structure of the utility model.
[0013] Figure 2 It is a structural schematic diagram of the rack support block structure. DETAILED DESCRIPTION
[0014] The present invention will be further described below by way of embodiments and in conjunction with the accompanying drawings:
[0015] Combination Figure 1 — Figure 2 As shown, a novel rack support block structure of a gear rack steering gear is composed of a rack support block body 1 and a rubber shock-absorbing sleeve 2.
[0016] The right end of the rack support block body 1 is provided with an arc groove matching the profile of the rack 3 .
[0017] A wear-resistant layer 11 is provided in the groove of the arc surface groove for isolating the rack 3 .
[0018] A spring placement groove 12 is provided in the center of the left end of the rack support block body 1 .
[0019] The spring placement groove 12 is equipped with a spring 13, and the left end of the spring 13 abuts against the vertical plane of the right end of the adjusting screw plug 4.
[0020] The rubber shock-absorbing sleeve 2 is tightly sleeved on the rack support block body 1 .
[0021] The left edge of the rubber shock-absorbing sleeve 2 exceeds the left end surface of the rack support block body 1 and abuts against the adjusting screw plug 4, thereby forming a shock-absorbing and noise-reducing area between the rack support block body 1 and the housing 5 and the adjusting screw plug 4 to reduce the impact noise of the parts.
[0022] A clearance fit is adopted between the rubber shock-absorbing sleeve 2 and the housing 5, and the clearance value is preferably 0.02 mm to 0.2 mm.
[0023] The left edge of the rubber shock-absorbing sleeve 2 preferably exceeds the left end surface of the rack support block body 1 by 0.1 mm to 0.5 mm.
[0024] The rubber shock-absorbing sleeve 2 is preferably made of NBR material.
[0025] The hardness of the rubber shock-absorbing sleeve 2 is preferably 50A to 90A.
[0026] By wrapping the rubber shock-absorbing sleeve 2 around the outer periphery of the rack support block body 1 , the effect of being integrated with the rack support block body 1 is achieved.
[0027] In this way, a shock-absorbing and noise-reducing area for alleviating impact is formed between the rack support block body 1 and the shell 5, and the rubber shock-absorbing sleeve 2 is circumferentially covered, with a large contact area and good buffering effect, thereby alleviating the impact from the shell 5 to achieve a buffering effect.
[0028] At the same time, the left edge of the rubber shock-absorbing sleeve 2 exceeds the left end surface of the rack support block body 1 to reduce the impact from the adjusting screw plug 4 to achieve a buffering effect.
Claims
1. A new rack support block structure of a gear rack steering gear, characterized in that: The invention comprises a rack support block body (1) and a rubber shock-absorbing sleeve (2), wherein the right end of the rack support block body (1) is provided with an arc surface groove matching the profile of the rack (3), and the groove of the arc surface groove is provided with a wear-resistant layer (11) for isolating the rack (3); the rubber shock-absorbing sleeve (2) is tightly fitted on the rack support block body (1), and the left end edge of the rubber shock-absorbing sleeve (2) exceeds the left end surface of the rack support block body (1) and abuts against the adjusting screw plug (4), thereby forming a shock-absorbing and noise-reducing zone between the rack support block body (1), the housing (5) and the adjusting screw plug (4) to reduce the impact noise of the parts.
2. The rack support block structure of a novel rack and pinion steering gear according to claim 1 is characterized in that: A spring placement groove (12) is provided in the center of the left end of the rack support block body (1), and the spring placement groove (12) is equipped with a spring (13), and the left end of the spring (13) abuts against the vertical plane of the right end of the adjusting screw plug (4).
3. The rack support block structure of a novel gear rack steering gear according to claim 1 is characterized in that: The rubber shock-absorbing sleeve (2) and the housing (5) are clearance-matched, and the clearance value is 0.02 mm to 0.2 mm.
4. The rack support block structure of a novel rack and pinion steering gear according to claim 1 is characterized in that: The left end edge of the rubber shock-absorbing sleeve (2) extends beyond the left end surface of the rack support block body (1) by 0.1 mm to 0.5 mm.
5. The rack support block structure of a novel rack and pinion steering gear according to claim 1 is characterized in that: The rubber shock-absorbing sleeve (2) is made of NBR material.
6. The rack support block structure of a novel rack and pinion steering gear according to claim 1 is characterized in that: The hardness of the rubber shock-absorbing sleeve (2) is 50A-90A.