Steering gear combination structure

Abstract

The utility model provides a steering gear combination structure and belongs to the technical field of steering gears. A steering gear combination structure comprises a steering gear shell, a gear shaft is installed in the steering gear shell, the bottom of the gear shaft is sleeved with a spacer bush assembly, and a needle bearing is arranged on the peripheral side of the spacer bush assembly; the spacer bush assembly comprises a first spacer bush and a second spacer bush, the first spacer bush abuts against the needle bearing, the second spacer bush is arranged on the gear shaft in a sleeved mode, the gear shaft can drive the bearing to generate large heat when the gear shaft rotates, paraffin in the deformation cavity is heated to expand, and the paraffin in the deformation cavity is heated to expand. On one hand, the gear shaft can be extruded through the expanded deformation cavity, the friction force between the second spacer bush and the gear shaft is increased, the second spacer bush and the gear shaft are matched more tightly, on the other hand, the cavity body of the storage cavity can be extruded through the expanded deformation cavity, lubricating oil in the storage cavity can be extruded out of the oil outlet hole, and the effect of lubricating the bearing is achieved.

Description

Technical Field

[0001] The utility model belongs to the field of steering gears, and in particular relates to a steering gear combination structure. Background Art

[0002] The gear shaft is a key component in the steering gear. Generally, the gear shaft is assembled with a deep groove ball bearing or a needle roller bearing to obtain rotational support. When in service, the inner roller of the needle roller bearing and the outer circle of the gear shaft repeatedly rotate in contact. The surface of the gear shaft mating point must be smooth and free of defects such as dents, so as to avoid loose fit, abnormal noise and other undesirable conditions caused by wear of the needle roller bearing roller, so that the needle roller bearing has a longer durability.

[0003] When installing needle roller bearings, due to the interference fit between the needle roller bearings and the gear shaft, installation methods such as hammering are required, which causes installation difficulties and installation damage. In addition, the lubricating oil inside the bearing is applied once. After long-term use, the needle rollers will cause quality problems such as wear and abnormal noise. Utility Model Content

[0004] The utility model aims at the deficiencies of the prior art and provides a steering gear combination structure.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme: a steering gear gear combination structure, including a steering gear housing, a gear shaft is installed in the steering gear housing, and is characterized in that: a spacer sleeve assembly is sleeved on the bottom of the gear shaft, and a needle bearing is provided on the outer peripheral side of the spacer sleeve assembly; the spacer sleeve assembly includes a first spacer sleeve and a second spacer sleeve, wherein the first spacer sleeve is abutted against the needle bearing, and the second spacer sleeve is sleeved on the gear shaft.

[0006] Optionally, a deformation cavity is provided inside the second spacer, and the deformation cavity is filled with paraffin. The material of the second spacer may be one of resin and rubber.

[0007] Optionally, a storage cavity is provided inside the first spacer, a plurality of oil outlet holes are provided on one end surface of the first spacer away from the second spacer, an oil filling port is provided on one end surface of the first spacer, a sealing bolt is connected to the inner thread of the oil filling port, and the oil filling port is connected to the storage cavity.

[0008] Optionally, the needle roller bearing comprises a bearing housing, and a retaining frame inside the bearing housing is equipped with at least two needle rollers.

[0009] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0010] 1. Due to the setting of the spacer assembly, the bearing can be driven to generate greater heat when the gear shaft rotates, causing the paraffin in the deformation cavity to expand due to the heat. On the one hand, the gear shaft can be squeezed through the expanded deformation cavity, increasing the friction between the second spacer and the gear shaft, making the two fit more closely. On the other hand, the cavity of the storage cavity can be squeezed through the expanded deformation cavity, and the lubricating oil in the storage cavity can be squeezed out from the oil outlet hole, thereby achieving the effect of lubricating the bearing.

[0011] 2. The second spacer, which is relatively soft, can be easily installed on the gear shaft, thus effectively avoiding damage to the gear shaft and bearing during installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the front view of the utility model.

[0013] Figure 2 For this utility model Figure 1 Enlarged view of point A in the middle.

[0014] Figure 3 It is a half-section stereoscopic view of the spacer sleeve assembly and the needle roller bearing of the utility model.

[0015] 10. Steering gear housing; 11. Gear shaft; 12. First spacer; 13. Second spacer; 14. Bearing housing; 15. Needle roller; 16. Storage chamber; 17. Deformation chamber; 18. Oil filling port; 19. Sealing bolt; 20. Oil outlet hole. DETAILED DESCRIPTION

[0016] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present invention.

[0017] As shown in Figure 1-3, a steering gear assembly structure includes a steering gear housing 10, a gear shaft 11 is installed in the steering gear housing 10, and is characterized in that: a spacer assembly is sleeved at the bottom of the gear shaft 11, a needle bearing is provided on the outer peripheral side of the spacer assembly, the needle bearing includes a bearing housing 14, and a retainer inside the bearing housing 14 is installed with at least two needle rollers 15;

[0018] The spacer assembly includes a first spacer 12 and a second spacer 13, wherein the first spacer 12 is abutted against the needle bearing, and the second spacer 13 is mounted on the gear shaft 11. A deformation cavity 17 is opened inside the second spacer 13, and the deformation cavity 17 is filled with paraffin. The material of the second spacer 13 can be one of resin and rubber, so that the second spacer 13 is easier to expand and deform.

[0019] A storage chamber 16 is provided inside the first spacer 12, and a plurality of oil outlet holes 20 are provided on one end surface of the first spacer 12 away from the second spacer 13. An oil filling port 18 is provided on one end surface of the first spacer 12, and a sealing bolt 19 is threadedly connected to the oil filling port 18. The oil filling port 18 is connected to the storage chamber 16, and lubricating oil can be added to the storage chamber 16 through the sealing bolt 19 and the oil filling port 18.

[0020] When in use, install the spacer assembly into the needle bearing, replacing the inner ring of the needle bearing, and then fit the whole assembly onto the gear shaft 11. Since the material of the second spacer 13 is relatively soft, it is relatively easy to fit, effectively avoiding damage to the gear shaft 11 and the bearing during installation. When the gear shaft starts to rotate, a large amount of heat will be generated inside it, and the heat will melt the paraffin in the deformation cavity 17, causing the deformation cavity 17 to expand. On the one hand, the expanded deformation cavity 17 can squeeze the gear shaft 11, increase the friction between the second spacer 13 and the gear shaft 11, and make the two fit more closely.

[0021] On the other hand, the expanded deformation cavity 17 can squeeze the cavity of the storage cavity 16, so that the lubricating oil in the storage cavity 16 can be squeezed out from the oil outlet 20 to achieve the effect of lubricating the bearing. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

Claims

1. A steering gear assembly structure, comprising a steering gear housing (10), wherein a gear shaft (11) is installed in the steering gear housing (10), characterized in that: The bottom of the gear shaft (11) is sleeved with a spacer assembly, and the outer peripheral side of the spacer assembly is provided with a needle bearing; The spacer sleeve assembly comprises a first spacer sleeve (12) and a second spacer sleeve (13), wherein the first spacer sleeve (12) is in contact with the needle roller bearing, and the second spacer sleeve (13) is sleeved on the gear shaft (11).

2. The steering gear assembly structure according to claim 1, characterized in that: A deformation cavity (17) is provided inside the second spacer (13), and the deformation cavity (17) is filled with paraffin. The material of the second spacer (13) can be one of resin and rubber.

3. The steering gear assembly structure according to claim 1, characterized in that: A storage chamber (16) is provided inside the first spacer (12); a plurality of oil outlet holes (20) are provided on one end surface of the first spacer (12) away from the second spacer (13); an oil filling port (18) is provided on one end surface of the first spacer (12); a sealing bolt (19) is connected to the internal thread of the oil filling port (18); and the oil filling port (18) is communicated with the storage chamber (16).

4. The steering gear assembly structure according to claim 1, characterized in that: The needle roller bearing comprises a bearing housing (14), and a retaining frame inside the bearing housing (14) is provided with at least two needle rollers (15).

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