Novel lubricating grease self-circulation steering gear pressing block structure

Abstract

The utility model discloses a novel lubricating grease self-circulation steering gear pressing block structure which comprises a pressing block base, a profiled groove used for being pressed on the back of a rack is formed in the pressing block base, a friction plate is arranged in the profiled groove, and an oil storage groove used for storing lubricating grease is formed in the friction plate. And oil storage holes communicated with the oil storage groove are formed in the pressing block base and the friction plate. The novel lubricating grease self-circulation steering gear pressing block is reasonable in structural design, the oil storage holes perpendicular to the axis of the pressing block are formed in the upper end and the lower end of the oil storage groove respectively, lubricating grease is pre-coated in the oil storage groove and the oil storage holes, and the lubricating grease can move up and down in the using process of a steering gear through negative pressure generated by movement of a rack. The rack can be automatically conveyed back and forth in the oil storage groove and the oil storage hole, whole-course lubrication of rack movement is achieved, abrasion of the pressing block and the rack can be reduced, meanwhile, friction noise is reduced, long-term use is stable and reliable, and product performance is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a car steering gear technology field especially a new type of grease self -circulation's steering gear pressure block structure. BACKGROUND

[0002] Gear rack type mechanical steering gear is applied more in the automobile steering system, gear shaft rotation drives rack left and right horizontal movement, thereby pushes / pulls knuckle, makes the wheel steering operation, gear rack meshing pressure block position has lubricating grease to lubricate, the recess for storing grease is provided in the pressure block matching place in the prior art, recess structure is built-in, the problem of grease shortage may appear after long -term use, influences lubrication effect.

[0003] Such as patent CN105667571A discloses a kind of steering gear rack compression structure and the method for measuring meshing gap using pressure block, with: the gear and rack mutually engaged installed in shell;Supporting pressure block of compressing rack, the end of supporting pressure block opposite with rack is face contact arc;Face contact arc's pressing sheet is arranged between supporting pressure block and rack, and the side of pressing sheet contact with rack is equipped with oil groove for storing lubricating medium;Pressure block plug of compressing supporting pressure block, and pressure block plug is connected with shell thread;Spring is arranged between pressure block plug and supporting pressure block, and the other end opposite with face contact arc end of supporting pressure block is equipped with boss;Recess structure is built-in, the problem of grease shortage may appear after long -term use, influences lubrication effect. UTILITY MODEL CONTENTS

[0004] In view of prior art deficiency, the utility model provides a kind of new type of grease self -circulation's steering gear pressure block structure, to reach the purpose of improving lubrication effect, long -term use stable and reliable.

[0005] In order to solve the above technical problems, the technical scheme adopted by the utility model is:

[0006] The new type of grease self -circulation's steering gear pressure block structure, including pressure block base, the profiled groove for being pressed on rack back on the pressure block base, friction plate is equipped in profiled groove, and oil storage groove for storing lubricating grease is equipped on friction plate, and the oil storage hole that is connected with oil storage groove is equipped on the pressure block base and friction plate.

[0007] Further:

[0008] The oil storage hole on the pressure block base and the oil storage hole on the friction plate are aligned and set, to form the oil storage hole structure that is through inside and outside.

[0009] The opening direction of the oil storage hole is perpendicular to the pressure block axis.

[0010] The oil storage groove is a pair of oil storage grooves arranged oppositely, and an oil storage hole is provided for each oil storage groove.

[0011] The back of the friction plate and the profile groove of the pressing block base are matched by the concave-convex positioning structure.

[0012] The oil storage groove is an arc-shaped strip-shaped groove, and the opening direction of the oil storage groove is perpendicular to the rack axial direction.

[0013] The oil storage hole is arranged at the outer end of the oil storage groove.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] The novel grease self-circulating steering gear pressing block structure is reasonable in design, one oil storage hole perpendicular to the pressing block axis is arranged at each of the upper end and the lower end of the oil storage groove, and grease is pre-coated in the oil storage groove and the oil storage hole, with the up-down movement of the rack in the steering gear during use, the grease can be automatically transported back and forth in the oil storage groove and the oil storage hole by the negative pressure generated by the rack movement, the whole process lubrication of the rack movement is realized, the wear of the pressing block and the rack can be reduced, the friction noise is reduced, the long-term use is stable and reliable, and the product performance is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] The content expressed by each drawing of the present specification and the marks in the drawings are briefly described as follows:

[0017] Figure 1 It is a sectional view of the pressing block structure of the utility model.

[0018] Figure 2 It is a schematic view of the pressing block structure of the utility model.

[0019] Figure 3 It is a schematic view of the friction plate of the utility model.

[0020] Figure 4 It is a schematic view of the oil storage groove and the oil storage hole of the utility model.

[0021] Figure 5 It is a top view of the pressing block matching surface of the utility model.

[0022] Figure 6 It is a sectional view along Figure 5 A-A of the utility model.

[0023] In the drawing:

[0024] 1. Pressing block base, 2. Friction plate, 3. O-shaped ring, 4. Oil storage groove, 5. Oil storage hole, 5a. One side oil storage hole, 5b. The other side oil storage hole, 6. Rack. DETAILED DESCRIPTION

[0025] The specific embodiments of the utility model are further described in detail by comparing the drawings and describing the embodiments.

[0026] As Figures 1 to 6 The new grease self-circulating steering gear block structure, including block base 1 and friction plate 2, the block base is used for pressing on the type groove on the back of rack, the friction plate is arranged in the type groove, the friction plate is provided with oil storage groove 4 for storing grease, and the block base and the friction plate are provided with oil storage holes communicated with the oil storage groove.

[0027] The oil storage hole on the block base 1 and the oil storage hole on the friction plate are arranged in alignment, forming an inner and outer through oil storage hole structure, facilitating the increase of grease. An oil storage hole 5 perpendicular to the block axis is formed at the upper and lower ends of the oil storage groove, and the oil storage groove and the oil storage hole are pre-coated with grease. With the up and down movement of the rack in the use process of the steering gear, the grease can be automatically transported back and forth in the oil storage groove and the oil storage hole by the negative pressure generated by the movement of the rack, realizing the whole process lubrication of the rack movement, reducing the wear of the block and the rack, and reducing the friction noise. Long-term use is stable and reliable, and the product performance is improved.

[0028] The back of the friction plate and the type groove of the block base are matched by concave-convex positioning structure; preferably, the back of the friction plate is provided with a positioning boss, and the type groove of the block base is provided with a positioning groove matched with the positioning boss, and the structure is stable and reliable.

[0029] The opening direction of the oil storage hole is perpendicular to the block axis, the oil storage groove is an arc-shaped strip groove, and the opening direction of the oil storage groove is perpendicular to the rack axial direction.

[0030] The oil storage groove 4 is a pair of relatively arranged oil storage grooves, each of which is provided with an oil storage hole 5, and the two oil storage holes are a one-side oil storage hole 5a and another-side oil storage hole 5b, and the oil storage holes are arranged at the outer ends of the oil storage grooves, and the structure is compact.

[0031] The utility model preferably provides a specific example:

[0032] The new grease self-circulating steering gear block structure, including block base 1, friction plate 2 and O-shaped ring 3;The block base is sintered by powder metallurgy material and is treated by vacuum oil immersion, so that the wear of the block and the steering gear shell can be reduced;The friction plate is sintered by PTEF and cold-rolled steel plate, and a concave oil storage groove is arranged on the friction surface;An oil storage hole perpendicular to the block axis is formed at the upper and lower ends of the oil storage groove;The oil storage groove and the oil storage hole are pre-coated with grease, and with the up and down movement of the rack in the use process of the steering gear, the grease can be automatically transported back and forth in the oil storage groove and the oil storage hole by the negative pressure generated by the movement of the rack, realizing the whole process lubrication of the rack movement, reducing the wear of the block and the rack;The structure has effective wear-resistant effect, reduces friction noise, prolongs product life, and improves product performance.

[0033] Two "U" type grooves are processed on the side surface of the pressing block base, two O-rings are installed in the "U" type grooves, a friction plate positioning boss is arranged on the back of the friction plate, the friction plate is fixed on the base through the positioning boss, a concave oil storage groove is arranged on the friction surface, the oil storage groove is perpendicular to the rack axis, and an oil storage hole perpendicular to the pressing block axis is formed at the upper end and the lower end of the oil storage groove respectively. Through the arrangement of the oil storage groove and the oil storage hole, additional lubricating grease can be provided when the rack slides, and the lubricating grease can be automatically transported in and out of the oil storage groove and the oil storage hole by the negative pressure generated by the rack movement, so that full-range lubrication of the rack movement is realized; at the same time, the impact of the pressing block on the shell can be effectively reduced and the product performance can be improved by using the powder metallurgy base and adding a set of O-rings.

[0034] A concave oil storage groove and two oil storage holes are arranged on the friction surface, the oil storage groove is perpendicular to the rack axis, the oil storage holes are perpendicular to the pressing block axis, the assembly is pre-coated with lubricating grease, additional lubricating grease can be provided when the rack slides, the wear of the rack and the pressing block can be effectively reduced, and the impact of the pressing block on the shell can be effectively reduced by using the powder metallurgy base and adding O-rings, so that the structure has effective wear resistance and low noise effect, and the product life is improved.

[0035] The above is only a description of the preferred embodiments of the present application, and the above technical features can be arbitrarily combined to form a plurality of embodiment schemes of the present application.

[0036] The above is only an exemplary description of the present application combined with the drawings, and obviously the specific implementation of the present application is not limited by the above manner, as long as various non-essential improvements are made by using the concept and technical scheme of the present application, or the concept and technical scheme of the present application is directly applied to other occasions without improvement, all of which are within the protection scope of the present application.

Claims

1. A new type of grease self-circulating steering gear block structure, comprising a block base, a type groove on the block base for pressing on the back of a rack, a friction plate provided in the type groove, and an oil storage groove provided on the friction plate for storing grease, characterized in that: The pressing block base and the friction plate are provided with oil storage holes which are communicated with the oil storage grooves.

2. The new grease self-circulating diverter pad structure of claim 1, wherein: The oil storage holes on the pressing block base and the friction plate are arranged in alignment to form an oil storage hole structure which is internally and externally through.

3. The new grease self-circulating diverter pad structure of claim 1, wherein: The oil storage holes are arranged in a direction perpendicular to the pressing block axis.

4. The new grease self-circulating diverter pad structure of claim 1, wherein: The oil storage grooves are oppositely arranged in pairs, and each of the oil storage grooves is provided with an oil storage hole.

5. The new grease self-circulating diverter pad structure of claim 1, wherein: The back of the friction plate and the profile groove of the pressing block base are matched and arranged through concave-convex positioning structures.

6. A new type of grease self-circulating diverter pad structure as claimed in claim 4, characterized in that: The oil storage grooves are arc-shaped strip grooves, and the oil storage grooves are arranged in a direction perpendicular to the rack shaft axis.

7. A new type of grease self-circulating diverter pad structure as claimed in claim 4, characterized in that: The oil storage holes are arranged at the outer ends of the oil storage grooves.

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