Steering device for underground carry-scraper

Abstract

The steering device for the underground carry-scraper comprises a connecting base, a rotating shaft and a bearing assembly, and the two ends of the rotating shaft are connected with a steering pump and a steering wheel correspondingly; the connecting seats are used for mounting rotating shafts; a lubricating cavity for storing lubricating oil is formed between the bearing assembly and the connecting seat; the bearing assembly is provided with an oil inlet communicated with the lubricating cavity. According to the steering device for the underground carry-scraper, the rotating shaft is sleeved with the bearing assembly, the lubricating cavity is formed between the bearing assembly and the connecting base, and lubricating oil can be contained in the lubricating cavity, so that the position between the rotating shaft and the bearing assembly is lubricated, the abradability of the rotating shaft and the bearing assembly is reduced, and the service life of the steering device is prolonged; moreover, the bearing assembly is provided with the oil inlet, and the oil inlet is communicated with the lubricating cavity, so that the lubricating oil can be injected into the lubricating cavity through the oil inlet, and the lubricating oil can be conveniently added.

Description

Technical Field

[0001] This application relates to the field of underground scraper technology, and more specifically to a steering device for an underground scraper. Background Technology

[0002] An underground loader is a piece of equipment designed for underground engineering projects such as mines and tunnels. It can be used for underground mining, tunnel construction, or other underground engineering projects, and has the functions of loading, transporting, and unloading. An underground loader consists of a front frame and a rear frame, which are connected by a steering mechanism. The steering wheel is connected to a steering pump through the steering mechanism, thereby controlling the vehicle's steering and allowing the front and rear frames to rotate relative to each other within a certain angle range.

[0003] In the steering device of the existing underground loader, there is a connecting seat and a rotating shaft. The connecting seat contains two bearings, and the rotating shaft is located between the two bearings. One end of the rotating shaft that extends out of the connecting seat is connected to the steering pump, and the other end is connected to the steering wheel. The end face of the connecting seat near the steering pump is a flange end face, and there is a transition component between the connecting seat and the steering pump. The flange end face of the connecting seat, the transition component, and the steering pump are connected by bolts, thereby connecting the connecting seat, the steering pump, and the transition component into one unit.

[0004] However, in this type of steering device, the connecting seat is designed as a cylindrical structure with openings at both ends that are much larger than the shaft. The shaft passes directly through the connecting seat, resulting in a non-sealed connection between the connecting seat and the shaft. Consequently, lubricating oil cannot be effectively stored in the connecting seat, leading to greater wear between the shaft and the bearing during rotation and significantly reducing the service life of the steering device.

[0005] Therefore, there is room for further improvement in the steering mechanisms of existing underground loader technologies. Utility Model Content

[0006] In view of this, and in response to the technical problem of easy wear of the steering device of the underground loader in the prior art, this application provides a steering device for an underground loader, which has a sealed space in the steering device. The sealed space can store lubricating oil to lubricate the shaft and bearing, reduce the wear of the shaft and bearing, and improve the service life of the steering device.

[0007] This application provides a steering device for an underground loader, comprising:

[0008] The pivot shaft is connected at both ends to the steering pump and the steering wheel, respectively.

[0009] Connecting bracket, used to mount the rotating shaft;

[0010] The bearing assembly is fitted onto the rotating shaft, forming a lubrication cavity for storing lubricating oil between itself and the connecting seat;

[0011] The bearing assembly is provided with an oil inlet that communicates with the lubrication chamber.

[0012] Compared with the prior art, the steering device for underground loaders of this application is provided with a bearing assembly, which is sleeved on the shaft. A lubrication cavity is formed between the bearing assembly and the connecting seat. The lubrication cavity can hold lubricating oil to lubricate the shaft and the bearing assembly, thereby reducing the wear of the shaft and the bearing assembly and improving the service life of the steering device. In addition, the bearing assembly is provided with an oil inlet, which is connected to the lubrication cavity, so that lubricating oil can be injected into the lubrication cavity through the oil inlet for convenient addition of lubricating oil.

[0013] Preferably, the connecting seat includes a first connecting plate and a second connecting plate, wherein the first connecting plate and the second connecting plate are arranged parallel to each other at intervals.

[0014] The bearing assembly is connected to the first connecting plate, and the second connecting plate is connected to the steering pump.

[0015] In this embodiment, by setting two separate connecting plates, which are respectively connected to the steering pump and the steering wheel, it is convenient to install the connecting seat with the steering pump and the steering wheel respectively, while enabling the bearing assembly to form an independent lubrication cavity with the first connecting plate.

[0016] Preferably, the first connecting plate is provided with a connecting disk, the connecting disk being coaxially arranged with the rotating shaft, and the inner diameter of the connecting disk being larger than the outer diameter of the rotating shaft;

[0017] The bearing assembly is provided with a threaded hole, and the connecting plate is provided with a limiting hole. The limiting hole and the threaded hole are coaxially arranged to allow the same connecting piece to be inserted.

[0018] In this embodiment, the connecting disc is provided with a limiting hole, which facilitates connection with the bearing assembly.

[0019] Preferably, the bearing assembly includes a first bearing housing and a second bearing housing, wherein the first bearing housing and the second bearing housing are axially disposed on both sides of the first connecting plate;

[0020] A lubrication cavity is formed between the first bearing housing, the second bearing housing, and the connecting seat.

[0021] In this embodiment, the first bearing housing and the second bearing housing are located on both sides of the connecting disc, thereby forming a sealed lubrication cavity; and the force on the rotating shaft is relatively uniform, ensuring the stability of the rotating shaft.

[0022] Preferably, the bearing assembly includes a mounting part and a connecting part, the mounting part being connected to a first connecting plate, and the connecting part being connected to a rotating shaft;

[0023] The connecting part is equipped with a bearing; the mounting part is equipped with a limiting ring, and the outer wall of the limiting ring is in contact with the inner wall of the connecting plate.

[0024] In this embodiment, a bearing is provided in the connecting part to ensure the rotational stability of the shaft relative to the connecting seat and the bearing assembly; the limiting ring can enhance the connection stability between the first bearing seat, the second bearing seat and the first connecting plate, and prevent the first bearing seat and the second bearing seat from displacing radially.

[0025] Preferably, there is an axial gap between the first bearing housing and the second bearing housing, and a radial gap between the inner wall of the limiting ring and the outer wall of the rotating shaft;

[0026] The axial clearance and radial clearance fit together to form a lubrication cavity.

[0027] In this embodiment, the reasonable setting of the axial clearance and radial clearance allows the lubricating oil to have a accommodating space.

[0028] Preferably, the oil inlet is provided with an oil nozzle, and the lubrication cavity is connected to the outside through the oil nozzle;

[0029] The lubricating oil is in a semi-fluid or fixed form.

[0030] Preferably, the bearing assembly is interference-fitted with the shaft;

[0031] or,

[0032] A sealing assembly is provided between the bearing assembly and the rotating shaft.

[0033] In this embodiment, the bearing assembly can be interference-fitted with the shaft to achieve a seal, or a sealing assembly can be provided between the shaft and the bearing assembly to ensure the airtightness of the lubrication cavity and reduce the loss of lubricating oil in the lubrication cavity.

[0034] Preferably, the second connecting plate is connected to the steering pump by bolts;

[0035] The second connecting plate has a limiting groove on the side facing the steering pump. The limiting groove is recessed in the direction away from the steering pump, and the steering pump is at least partially located in the limiting groove. The limiting groove is used to limit the steering pump.

[0036] In this embodiment, the limiting groove can limit the steering pump, so that the steering pump will not easily deviate, ensuring the connection stability between the steering pump and the second connecting plate, and allowing the steering pump to be installed vertically on the connecting seat.

[0037] Preferably, multiple limiting holes are provided, and the limiting holes are equally spaced on the same circumference;

[0038] The first bearing housing is provided with a first threaded hole, and multiple first threaded holes are equally spaced on the same circumference;

[0039] The second bearing housing is provided with a second threaded hole, and multiple second threaded holes are equally spaced on the same circumference;

[0040] Some of the limiting holes are coaxial with the first threaded hole, and some of the limiting holes are coaxial with the second threaded hole. The axes of the first threaded hole and the second threaded hole are not on the same straight line.

[0041] In this embodiment, by setting the first threaded hole and the second threaded hole to be non-axial, the first bearing seat and the second bearing seat are staggered when connected to the connecting plate, which reduces the number of first threaded holes and the second threaded hole and ensures the structural strength of the first bearing seat and the second bearing seat. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the structure of a steering device for an underground loader provided in an embodiment of this application;

[0043] Figure 2 This is a partial cross-sectional structural schematic diagram of a steering device for an underground loader provided in an embodiment of this application;

[0044] Figure 3 This is a three-dimensional structural diagram of a connector provided in an embodiment of this application.

[0045] Reference numerals: 1. Steering device for underground scraper; 2. Steering wheel; 3. Steering pump;

[0046] 11. Shaft; 12. Connecting seat; 13. Bearing assembly; 14. Oil nozzle; 15. Lubrication chamber;

[0047] 121. First connecting plate; 122. Second connecting plate; 123. Connecting disc; 1221. Limiting groove; 1231. Limiting hole;

[0048] 131. First bearing housing; 132. Second bearing housing; 133. First threaded hole; 134. Second threaded hole; 135. First connecting piece; 136. Second connecting piece; 137. First limiting ring; 138. Second limiting ring. Detailed Implementation

[0049] To enable those skilled in the art to better understand the technical solutions of this disclosure, the following detailed, clear, and complete description of this disclosure is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this disclosure and are not intended to limit it.

[0050] In the description of this application, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0051] Those skilled in the art should understand that in the disclosure of this application, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this application.

[0052] The present application will now be described in further detail with reference to the accompanying drawings, see below. Figures 1 to 3 illustrate.

[0053] This application provides a steering device 1 (hereinafter referred to as steering device 1) for an underground loader. The steering device 1 is disposed between the front and rear frames of the underground loader and is used to assist the front and rear frames in rotating relative to each other within a certain angle.

[0054] like Figure 1 , Figure 2 As shown, the steering device 1 includes a rotating shaft 11, a connecting seat 12, and a bearing assembly 13. The rotating shaft 11 passes through the connecting seat 12, and both ends of the rotating shaft 11 are connected to the steering pump 3 and the steering wheel 2, respectively. The bearing assembly 13 is sleeved on the rotating shaft 11, and the bearing assembly 13 and the connecting seat 12 form a closed lubrication cavity 15. Lubricating oil can be placed in the lubrication cavity 15 to lubricate the rotating shaft 11 and the bearing assembly 13, thereby reducing the wear of the rotating shaft 11 and the bearing assembly 13 and improving the service life of the steering device 1. Furthermore, the bearing assembly 13 is provided with an oil inlet, which communicates with the lubrication cavity 15, so that lubricating oil can be injected into the lubrication cavity 15 through the oil inlet for convenient addition of lubricating oil.

[0055] Among them, such as Figure 1 As shown, an oil inlet 14 is provided at the oil inlet, and the lubrication chamber 15 is connected to the outside through the oil inlet 14, so that the operator can inject lubricating oil into the lubrication chamber 15 through the oil inlet 14, and the oil inlet 14 can be connected to a lubrication device to achieve automatic lubrication.

[0056] In this embodiment, the grease nipple 14 can be a converter connector to facilitate connection to the pipeline of the lubrication device.

[0057] Specifically, such as 1 to Figure 3As shown, the connecting seat 12 includes a first connecting plate 121 and a second connecting plate 122. The first connecting plate 121 and the second connecting plate 122 are arranged parallel to each other along the axial direction. The first connecting plate 121 and the second connecting plate 122 are connected by a vertical plate, which is parallel to the rotating shaft 11. The first connecting plate 121 is located on the side closer to the steering wheel 2, and the second connecting plate 122 is located on the side closer to the connecting plate. One end of the rotating shaft 11 passes through the first connecting plate 121 and is connected to the steering wheel 2, and the other end of the rotating shaft 11 passes through the second connecting plate 122 and is connected to the steering pump 3. The first connecting plate 121 is connected to the bearing assembly 13 and forms a lubrication cavity 15. The second connecting plate 122 is connected to the steering pump 3 by bolts.

[0058] The first connecting plate 121 is provided with an installation port for the rotating shaft 11 to pass through, and the inner diameter of the installation port is larger than the outer diameter of the rotating shaft 11.

[0059] Based on the above embodiments, the connection structure between the first connecting plate 121 and the bearing assembly 13 will be further described; for example... Figures 1 to 3 As shown, the bearing assembly 13 includes two bearing seats, which are coaxially arranged with the first connecting plate 121 and the rotating shaft 11. The two bearing seats are respectively arranged on both sides of the first connecting plate 121 along the axial direction. Each bearing seat includes a mounting part and a connecting part, which are radially connected to the mounting part. The mounting part is connected to the first connecting plate 121, and the connecting part is connected to the rotating shaft 11. A bearing is provided in the connecting part and is sleeved on the rotating shaft 11 so that the rotating shaft 11 can rotate relative to the first connecting plate 121 and the bearing assembly 13. The mounting part is connected to the first connecting plate 121 by bolts to achieve axial positioning of the bearing assembly 13 and the first connecting plate 121.

[0060] The mounting section includes a limiting ring and a mounting ring. The mounting ring is arranged parallel to the radial direction and is attached to and connected to the end face of the first connecting plate 121 to achieve axial limiting connection between the bearing housing and the first connecting plate 121. The limiting ring is located on the side of the mounting ring facing the first connecting plate 121 and extends axially. The limiting ring acts on the inner side of the first connecting plate 121, and the outer wall of the limiting ring is attached to the inner wall of the connecting plate 123, thereby limiting the bearing housing within the mounting opening of the first connecting plate 121 to achieve radial limiting between the bearing housing and the first connecting plate 121. This prevents the bearing housing and the first connecting plate 121 from easily undergoing radial displacement, ensuring the connection stability between the bearing assembly 13 and the first connecting plate 121, and further ensuring the connection stability between the rotating shaft 11 and the connecting seat 12.

[0061] Furthermore, such as Figure 2As shown, the two bearing housings are a first bearing housing 131 and a second bearing housing 132, respectively. The first bearing housing 131 is located on the side of the first connecting plate 121 near the steering wheel 2, and the second bearing housing 132 is located on the side of the second connecting plate 122 near the steering pump 3; wherein, as... Figure 2 As shown, there is an axial gap between the first bearing housing 131 and the second bearing housing 132. The first bearing housing 131 is provided with a first limiting ring 137, and the second bearing housing 132 is provided with a second limiting ring 138. The first limiting ring 137 and the second limiting ring 138 are coaxially arranged and have the same inner and outer diameters. The inner diameter of the first limiting ring 137 is larger than the outer diameter of the rotating shaft 11, so that there is a radial gap between the inner wall of the first limiting ring 137 and the outer wall of the rotating shaft 11. The inner diameter of the second limiting ring 138 is larger than the outer diameter of the rotating shaft 11, so that there is a radial gap between the inner wall of the second limiting ring 138 and the outer wall of the rotating shaft 11. The radial gap and the axial gap together form a lubrication cavity 15. Lubricating oil is disposed in the lubrication cavity 15, which can lubricate the rotating shaft 11 and the bearing and reduce wear.

[0062] To reduce the probability of lubricating oil loss in the lubrication cavity 15, a semi-fluid or solid lubricating material, such as glycerin, is selected as the lubricating oil. This type of lubricating material has a high viscosity, is not easy to flow, can form a thick protective layer on the shaft 11 and bearing wall, and has good adhesion, making it not easy to lose. This reduces the probability of lubricating oil loss from the lubrication cavity 15 and provides long-term lubrication protection for the shaft 11.

[0063] Furthermore, the bearing assembly 13 and the rotating shaft 11 are fitted with an interference fit, which makes the bearing inner cylinder fit tightly with the rotating shaft 11, reducing the probability of lubricating oil leakage from the connection between the rotating shaft 11 and the bearing; this structure, combined with semi-fluid or solid lubricating grease, further reduces the probability of lubricating oil leakage from the lubrication cavity 15.

[0064] In another optional embodiment, a sealing assembly is provided between the bearing assembly 13 and the rotating shaft 11. The sealing assembly includes two sealing rings, which are fitted onto the rotating shaft 11. The two sealing rings act on the first bearing seat 131 and the second bearing seat 132 located at the ends of the lubrication cavity 15. Furthermore, a limiting sleeve can be provided between the two sealing rings. The limiting sleeve is fitted onto the rotating shaft 11, and its two ends act on the two sealing rings respectively to axially limit the sealing rings, so that the sealing rings will not easily displace, ensuring the stability of the sealing rings, thereby ensuring the sealing performance at the connection between the bearing assembly 13 and the rotating shaft 11. Combined with semi-fluid or solid lubricating grease, the probability of lubricating oil loss in the lubrication cavity 15 is further reduced.

[0065] like Figure 2 , Figure 3As shown, the first connecting plate 121 is provided with a connecting disk 123, which is disposed in the mounting opening of the first connecting plate 121. The connecting disk 123 has a disc-shaped structure, and the outer wall of the connecting disk 123 is tightly fitted with the inner wall of the first connecting plate 121. The connecting disk 123 is coaxially arranged with the rotating shaft 11, and the inner diameter of the connecting disk 123 is larger than the outer diameter of the rotating shaft 11. The bearing assembly 13 is connected to the connecting disk 123, and the axial thickness of the connecting disk 123 is greater than the axial thickness of the first connecting plate 121, thereby increasing the structural strength of the connecting disk 123.

[0066] The connecting plate 123 is provided with limiting holes 1231. Multiple limiting holes 1231 are provided and penetrate the connecting plate 123 axially. Multiple limiting holes 1231 are equally spaced on the same circumference. The bearing assembly 13 is provided with threaded holes. The limiting holes 1231 and the threaded holes are coaxially arranged to allow the same connecting piece to be inserted, so as to realize the connection between the connecting plate 123 and the bearing assembly 13.

[0067] Specifically, such as Figure 2 As shown, the first bearing housing 131 is provided with a first threaded hole 133, and there are multiple first threaded holes 133, which are equidistantly arranged on the same circumference; the second bearing housing 132 is provided with a second threaded hole 134, and there are multiple second threaded holes 134, which are equidistantly arranged on the same circumference; wherein, the total number of first threaded holes 133 and second threaded holes 134 is equal to the number of limiting holes 1231;

[0068] like Figure 2 As shown, a portion of the limiting hole 1231 is coaxially arranged with the first threaded hole 133, that is, the first threaded hole 133 and a portion of the limiting hole 1231 are aligned, so that the first connecting member 135 can be inserted, thereby realizing the connection between the first bearing seat 131 and the connecting plate 123; a portion of the limiting hole 1231 is coaxially arranged with the second threaded hole 134, that is, the second threaded hole 134 and a portion of the limiting hole 1231 are aligned, so that the second connecting member 136 can be inserted, thereby realizing the connection between the second bearing seat 132 and the connecting plate 123; and the first threaded hole 133 and the second threaded hole The axes of 134 are not on the same straight line. The first threaded hole 133 and the second threaded hole 134 are staggered so that each limiting hole 1231 only mates with one threaded hole, so that the first bearing housing 131 and the second bearing housing 132 are indirectly connected through the connecting plate 123. This can reduce the number of threaded holes on the first bearing housing 131 and the second bearing housing 132, and ensure the structural strength of the first bearing housing 131 and the second bearing housing 132, while also ensuring the stable connection between the bearing assembly 13 and the connecting plate 123.

[0069] Based on any of the above embodiments, the connection structure between the second connecting plate 122 and the steering pump 3 will be further described; such as Figures 1 to 3 As shown, the second connecting plate 122 has multiple threaded holes, and the steering pump 3 has corresponding threaded holes, so that the second connecting plate 122 and the steering pump 3 are connected by bolts. The second connecting plate 122 also has a mounting port for the rotating shaft 11 to pass through.

[0070] Furthermore, such as Figure 2 As shown, the second connecting plate 122 has a limiting groove 1221 on the side facing the steering pump 3. The limiting groove 1221 is located at the bottom of the second connecting plate 122 and is recessed in the direction away from the steering pump 3. The top of the steering pump 3 is tightly fitted with the bottom of the second connecting plate 122 so that the steering pump 3 is at least partially located in the limiting groove 1221. The limiting groove 1221 is used to limit the steering pump 3 so that the steering pump 3 will not easily deviate, ensuring the connection stability between the steering pump 3 and the second connecting plate 122, so that the steering pump 3 can be vertically installed on the connecting seat 12, ensuring the transmission stability of the steering pump 3 to the rotating shaft 11, thereby ensuring the stable operation of the steering device 1.

[0071] It should be noted that in this application, the first connector 135 and the second connector 136 are configured as screws or bolts; the first threaded hole 133, the second threaded hole 134, and the limiting hole 1231 are all provided with threads.

[0072] It should be noted that the various embodiments of this application can be arbitrarily combined into new embodiments, provided that the solutions do not conflict and the technical solutions can coexist.

[0073] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A steering device for an underground loader, characterized in that, include: The rotating shaft (11) is connected at both ends to the steering pump (3) and the steering wheel (2) respectively; Connecting seat (12) for mounting the rotating shaft (11); The bearing assembly (13) is sleeved on the rotating shaft (11) and forms a lubrication cavity (15) for storing lubricating oil between it and the connecting seat (12); The bearing assembly (13) is provided with an oil inlet that communicates with the lubrication chamber (15).

2. The steering device for an underground loader according to claim 1, characterized in that, The connecting seat (12) includes a first connecting plate (121) and a second connecting plate (122), wherein the first connecting plate (121) and the second connecting plate (122) are arranged parallel to each other at intervals. The bearing assembly (13) is connected to the first connecting plate (121), and the second connecting plate (122) is connected to the steering pump (3).

3. The steering device for an underground loader according to claim 2, characterized in that, The first connecting plate (121) is provided with a connecting disk (123), the connecting disk (123) is coaxially arranged with the rotating shaft (11), and the inner diameter of the connecting disk (123) is larger than the outer diameter of the rotating shaft (11); The bearing assembly (13) is provided with a threaded hole, and the connecting plate (123) is provided with a limiting hole (1231). The limiting hole (1231) and the threaded hole are coaxially arranged to allow the same connecting piece to be inserted.

4. The steering device for an underground loader according to claim 3, characterized in that, The bearing assembly (13) includes a first bearing housing (131) and a second bearing housing (132), and the first bearing housing (131) and the second bearing housing (132) are arranged axially on both sides of the first connecting plate (121); A lubrication cavity (15) is formed between the first bearing housing (131), the second bearing housing (132), and the connecting seat (12).

5. The steering device for an underground loader according to claim 4, characterized in that, The bearing assembly (13) includes a mounting part and a connecting part. The mounting part is connected to the first connecting plate (121), and the connecting part is connected to the rotating shaft (11). The connecting part is provided with a bearing; the mounting part is provided with a limiting ring, and the outer wall of the limiting ring is in contact with the inner wall of the connecting plate (123).

6. The steering device for an underground loader according to claim 5, characterized in that, There is an axial gap between the first bearing housing (131) and the second bearing housing (132), and there is a radial gap between the inner wall of the limiting ring and the outer wall of the rotating shaft (11); The axial clearance and radial clearance are fitted together to form a lubrication cavity (15).

7. The steering device for an underground loader according to claim 1, characterized in that, The oil inlet is provided with an oil nozzle (14), and the lubrication cavity (15) is connected to the outside through the oil nozzle (14); The lubricating oil is in a semi-fluid or fixed form.

8. The steering device for an underground loader according to claim 1, characterized in that, The bearing assembly (13) is interference-fitted with the rotating shaft (11); or, A sealing assembly is provided between the bearing assembly (13) and the rotating shaft (11).

9. The steering device for an underground loader according to claim 2, characterized in that, The second connecting plate (122) is connected to the steering pump (3) by bolts; The second connecting plate (122) is provided with a limiting groove (1221) on the side facing the steering pump (3). The limiting groove (1221) is recessed in the direction away from the steering pump (3). The steering pump (3) is at least partially located in the limiting groove (1221). The limiting groove (1221) is used to limit the steering pump (3).

10. The steering device for an underground loader according to claim 4, characterized in that, Multiple limiting holes (1231) are provided, and the limiting holes (1231) are equally spaced on the same circumference; The first bearing housing (131) is provided with a first threaded hole (133), and a plurality of first threaded holes (133) are equally spaced on the same circumference; The second bearing housing (132) is provided with a second threaded hole (134), and multiple second threaded holes (134) are equally spaced on the same circumference; Among them, some of the limiting holes (1231) are coaxially arranged with the first threaded hole (133), and some of the limiting holes (1231) are coaxially arranged with the second threaded hole (134). The axes of the first threaded hole (133) and the second threaded hole (134) are not on the same straight line.

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