Electric steering pump

Abstract

The utility model discloses an electric steering pump which comprises a motor and a hydraulic oil pump. A first mounting part is arranged at the first end of the motor, a second mounting part is arranged at the second end of the hydraulic oil pump, the second mounting part is connected with the first mounting part, a via hole is formed in the first mounting part, a first oil seal is arranged in the via hole, a storage space is formed between the first oil seal and the second mounting part, and a lubricating part is arranged in the storage space; and a pump shaft of the hydraulic oil pump penetrates through the second mounting part and is connected with the motor shaft in the storage space. Thus, the lubricating part is arranged in the storage space between the first mounting part and the second mounting part, the joint of the motor shaft and the pump shaft is cooled and lubricated through the lubricating part, the service life of the electric steering pump is prolonged, meanwhile, the first oil seal is arranged in the first mounting part, substances of the lubricating part can be prevented from leaking into the motor from the storage space, and the service life of the electric steering pump is prolonged. Internal devices of the motor are protected, and the service life and safety of the motor are improved.

Description

Technical Field

[0001] The invention relates to the technical field of motor pumps, and in particular to an electric steering pump. Background Art

[0002] The power source of the steering system of new energy commercial vehicles currently in use is an electric steering pump. The drive between the hydraulic oil pump and the motor is rigidly connected, and the motor shaft of the motor is connected to the inside of the body, driving the pump shaft of the hydraulic oil pump to rotate. There is no long-term lubrication structure between the motor shaft and the pump shaft. The product will wear out after a period of use. When the working surface of the motor shaft is worn out, it will cause the electric steering pump assembly product to fail, which poses a great threat to vehicle safety. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides an electric steering pump.

[0004] The utility model provides an electric steering pump, which comprises a motor and a hydraulic oil pump;

[0005] A first mounting portion is provided at a first end of the motor, a second mounting portion is provided at a second end of the hydraulic oil pump, and the second mounting portion is connected to the first mounting portion;

[0006] A through hole is provided inside the first mounting portion, a first oil seal is provided in the through hole, a storage space is formed between the first oil seal and the second mounting portion, and a lubrication portion is provided in the storage space;

[0007] One end of the motor shaft of the motor passes through the through hole and the first oil seal and is arranged in the storage space. The pump shaft of the hydraulic oil pump passes through the second mounting portion and is connected to the motor shaft in the storage space.

[0008] In some embodiments of the present disclosure, a mounting groove is provided in the second mounting portion, a second oil seal is provided in the mounting groove, and the storage space is provided between the first oil seal and the second oil seal.

[0009] In some embodiments of the present disclosure, a fixing groove is further provided in one end of the first mounting portion close to the hydraulic oil pump, and the fixing groove is communicated with the through hole;

[0010] A fixing boss is provided at one end of the second mounting portion close to the motor, and the fixing boss is plugged into the fixing groove.

[0011] In some embodiments of the present disclosure, the cross-sectional diameter of the via hole is smaller than the cross-sectional diameter of the fixing boss, the cross-sectional diameter of the via hole is larger than the cross-sectional diameter of the mounting groove, and the storage space is entirely located within the via hole.

[0012] In some embodiments of the present disclosure, the outer ring of the second mounting portion is provided with a connecting portion, the connecting portion is provided with a first fixing hole, the first mounting portion is provided with a second fixing hole adapted to the first fixing hole, and the first fixing hole and the second fixing hole are fixedly connected by bolts.

[0013] In some embodiments of the present disclosure, the end face of the fixing boss fits with the bottom of the fixing groove, the outer side wall of the fixing boss fits with the inner side wall of the fixing groove, and the end face of the connecting portion abuts with the end face of the first mounting portion.

[0014] In some embodiments of the present disclosure, a sealing groove is provided at a connection point between the first mounting portion and the connecting portion along an outer side wall of the first mounting portion, and a first sealing ring is provided in the sealing groove.

[0015] In some embodiments of the present disclosure, a spline hole is provided on the first end of the motor shaft, an external spline matching the spline hole is provided on the first end of the pump shaft, and the external spline of the pump shaft is connected to the spline hole, or,

[0016] An external spline is arranged on the first end of the motor shaft, a spline hole matching the external spline is arranged on the first end of the pump shaft, and the external spline of the motor shaft is connected to the spline hole.

[0017] In some embodiments of the present disclosure, a baffle is provided in the through hole, the first oil seal is arranged on the side of the baffle close to the hydraulic oil pump, a bearing is provided on the side of the baffle away from the hydraulic oil pump, and the motor shaft is connected to the first mounting portion through the bearing.

[0018] In some embodiments of the present disclosure, an annular stopper is provided on the motor shaft, and the bearing is arranged between the annular stopper and the baffle.

[0019] The electric steering pump provided by the utility model has at least the following advantages:

[0020] The electric steering pump provided by the utility model connects the first mounting part of the motor with the second mounting part of the hydraulic oil pump to form a storage space between the first mounting part and the second mounting part, and a lubrication part is arranged in the storage space, and the connection between the motor shaft of the motor and the pump shaft of the hydraulic oil pump can be cooled and lubricated by the lubrication part, so as to effectively solve the wear problem of the connection between the motor and the hydraulic oil pump, extend the service life of the electric steering pump, and make the operation of the electric steering pump more stable; at the same time, a first oil seal is arranged in the first mounting part, and the first oil seal can prevent the material of the lubrication part from leaking from the storage space to the inside of the motor, so as to protect the internal components of the motor, reduce the maintenance cost due to motor damage, and improve the service life and safety of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 A schematic diagram of the three-dimensional structure of an electric steering pump provided by an exemplary embodiment of the utility model;

[0023] Figure 2 A schematic cross-sectional structure diagram of an electric steering pump provided by an exemplary embodiment of the utility model;

[0024] Figure 3 A schematic cross-sectional structure diagram of a motor provided by an exemplary embodiment of the utility model;

[0025] Figure 4 The present invention is a schematic cross-sectional structural diagram of a hydraulic oil pump provided by an exemplary embodiment of the present invention.

[0026] The following are marked in the accompanying drawings:

[0027] 1. Motor; 11. First mounting portion; 111. Baffle; 112. First oil seal; 113. Storage space; 114. Fixing groove; 115. Second fixing hole; 116. First sealing ring; 12. Motor shaft; 121. Annular baffle; 122. Spline hole; 13. Bearing;

[0028] 2. Hydraulic oil pump; 21. Second mounting portion; 211. Second oil seal; 212. Fixed boss; 213. Connecting portion; 214. Bolt; 22. Pump shaft; 221. External spline. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the protection scope of the utility model.

[0030] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0031] The existing new energy commercial vehicle steering system power source uses an electric hydraulic oil pump. The steering motor drives the traditional hydraulic oil pump to provide a hydraulic power source for the steering system. The drive between the hydraulic oil pump and the motor is rigidly connected. One end of the motor shaft of the motor is connected to the inside of the body, and the other end of the motor shaft drives the iron connecting block to drive the pump shaft of the hydraulic oil pump to rotate. There is no long-term lubrication structure between the motor shaft and the connecting block, and between the connecting block and the pump shaft. The product will wear out after a period of use. When the working surface of the motor shaft is worn out, it will cause the electric steering pump assembly product to fail, posing a great threat to vehicle safety.

[0032] Combine the following Figure 1-Figure 4 The embodiments of the present utility model are further described.

[0033] In order to solve the above technical problems, Figure 1 and Figure 2 As shown, an exemplary embodiment of the present utility model provides an electric steering pump, which includes a motor 1 and a hydraulic oil pump 2 .

[0034] The first end of the motor 1 is provided with a first mounting portion 11, and the second end of the hydraulic oil pump 2 is provided with a second mounting portion 21, and the second mounting portion 21 is connected to the first mounting portion 11. Figure 1 and Figure 2 In the figure, the pump body structure on the left is the motor 1, and the pump body structure on the right is the hydraulic oil pump 2, wherein the first mounting portion 11 and the second mounting portion 21 can be connected by means of bolts 214 or the like. A through hole is provided inside the first mounting portion 11, and a first oil seal 112 is provided inside the through hole. It can be understood that the first oil seal 112 is sleeved on the motor shaft 12 of the motor 1. A storage space 113 is formed between the first oil seal 112 and the second mounting portion 21, and a lubrication portion is provided in the storage space 113, wherein the substance in the lubrication portion can be lubricating oil, or the oil in the hydraulic oil pump 2 can be directly flowed into the storage space 113, thereby lubricating the connection between the motor shaft 12 and the pump shaft 22; one end of the motor shaft 12 of the motor 1 is arranged in the storage space 113 through the through hole and the first oil seal 112, and the pump shaft 22 of the hydraulic oil pump 2 passes through the second mounting portion 21 and is connected to the motor shaft 12 in the storage space 113.

[0035] By adopting such a setting form, a storage space 113 is formed between the first mounting part 11 and the second mounting part 21 by connecting the first mounting part 11 of the motor 1 with the second mounting part 21 of the hydraulic oil pump 2, and a lubrication part is provided in the storage space 113. The connection between the motor shaft 12 of the motor 1 and the pump shaft 22 of the hydraulic oil pump 2 can be cooled and lubricated by the lubrication part, which can effectively solve the wear problem at the connection between the motor 1 and the hydraulic oil pump 2, extend the service life of the electric steering pump, and make the operation of the electric steering pump more stable. At the same time, a first oil seal 112 is provided in the first mounting part 11. The first oil seal 112 can prevent the material of the lubrication part from leaking from the storage space 113 to the inside of the motor 1, thereby protecting the internal components of the motor 1, reducing the maintenance cost due to damage to the motor 1, and improving the service life and safety of the motor 1.

[0036] In some embodiments of the present invention, referring to Figure 1 , Figure 2 and Figure 4 , a mounting groove is provided in the second mounting portion 21, a second oil seal 211 is provided in the mounting groove, and a storage space 113 is provided between the first oil seal 112 and the second oil seal 211, that is, the first oil seal 112 is sleeved on the motor shaft 12, the second oil seal 211 is sleeved on the pump shaft 22, and the connection port between the motor shaft 12 and the pump shaft 22 is located in the storage space 113. With such a setting form, the storage space 113 can be used to store oils such as lubricating oil or hydraulic oil, and lubricate and cool the motor shaft 12 and the pump shaft 22. At the same time, the first oil seal 112 and the second oil seal 211 are provided at both ends of the storage space 113, respectively, so as to prevent the substances in the storage space 113 from leaking into the motor 1 and the hydraulic oil pump 2, and prevent the internal components of the motor 1 and the hydraulic oil pump 2 from being damaged, thereby improving the reliability and stability of the entire motor 1 steering pump, and ensuring the normal operation and service life of the motor 1 and the hydraulic oil pump 2.

[0037] In some embodiments of the present invention, referring to Figure 1 , Figure 2 and Figure 3 The first mounting portion 11 is provided with a fixing groove 114 at one end close to the hydraulic oil pump 2, and the fixing groove 114 is connected to the through hole; the second mounting portion 21 is provided with a fixing boss 212 at one end close to the motor 1, and the fixing boss 212 is plugged into the fixing groove 114, that is, referring to Figure 2The fixed boss 212 is inserted into the fixed groove 114, the outer wall of the fixed boss 212 is fitted with the inner wall of the fixed groove 114, and the end face of the fixed boss 212 is fitted with the bottom of the fixed groove 114. This arrangement can effectively improve the sealing performance between the motor 1 and the hydraulic oil pump 2. The fixed boss 212 is fitted with each surface connected to the fixed groove 114, which can reduce the risk of leakage of the lubrication part in the storage space 113, improve the efficiency of the steering pump of the motor 1, and prevent impurities from entering the storage space 113 and contaminating the lubrication part, thereby improving the reliability and maintainability of the steering pump of the motor 1.

[0038] In some embodiments of the present invention, referring to Figure 2 , Figure 3 and Figure 4 The cross-sectional diameter of the via hole is smaller than the cross-sectional diameter of the fixing boss 212, and the cross-sectional diameter of the via hole is larger than the cross-sectional diameter of the mounting groove, and the storage space 113 is entirely located in the via hole. In this way, the cross-sectional diameter of the via hole is smaller than the cross-sectional diameter of the fixing boss 212, which can ensure that the connection between the fixing boss 212 and the fixing groove 114 is more firm and stable, and is conducive to preventing the fixing boss 212 from entering the via hole.

[0039] In some embodiments of the present invention, referring to Figure 2 , Figure 3 and Figure 4 The outer circle of the second mounting portion 21 is provided with a connecting portion 213, and a first fixing hole is provided on the connecting portion 213. The first mounting portion 11 is provided with a second fixing hole 115 adapted to the first fixing hole. The first fixing hole and the second fixing hole 115 are fixedly connected by bolts 214.

[0040] The connecting portion 213 is arranged around the outer ring of the second mounting portion 21, and a plurality of first fixing holes may be provided on the connecting portion 213, and the plurality of first fixing holes are arranged along the circumferential direction of the second mounting portion 21. For example, referring to Figure 1 and Figure 4 Two first fixing holes are provided on the connecting portion 213, wherein the two first fixing holes are symmetrically arranged on the left and right sides of the second mounting portion 21. After the fixing boss 212 is inserted into the fixing groove 114, the first fixing hole is connected and fixed with the second fixing hole 115 by bolts 214. In this way, the connection method using the bolts 214 ensures that the connection between the first mounting portion 11 and the second mounting portion 21 is safe and reliable, and can achieve rapid installation and removal between the first mounting portion 11 and the second mounting portion 21, reduce the time and cost of installation and removal, and improve the maintainability and operability of the steering pump of the motor 1.

[0041] In some embodiments of the present invention, referring to Figure 2 , Figure 3 and Figure 4The end face of the fixed boss 212 fits with the bottom of the fixed groove 114, the outer wall of the fixed boss 212 fits with the inner wall of the fixed groove 114, and the end face of the connecting portion 213 abuts against the end face of the first mounting portion 11. In this way, the sealing performance between the motor 1 and the hydraulic oil pump 2 can be effectively improved. The fixed boss 212 and the fixed groove 114 are all fitted together to reduce the risk of leakage of the lubricating part in the storage space 113, improve the efficiency of the steering pump of the motor 1, and prevent impurities from entering the storage space 113 and contaminating the lubricating part, thereby improving the reliability and maintainability of the steering pump of the motor 1.

[0042] In some embodiments of the present invention, referring to Figure 2 , Figure 3 and Figure 4 A sealing groove is provided along the outer wall of the first mounting portion 11 at the connection between the first mounting portion 11 and the connecting portion 213, and a first sealing ring 116 is provided in the sealing groove. In this way, by providing the first sealing ring 116 at the connection between the motor 1 and the hydraulic oil pump 2, the leakage of the lubricating material in the storage space 113 can be effectively prevented. The first sealing ring 116 can fit tightly in the sealing groove, effectively preventing foreign materials from entering the storage space 113, improving the sealing performance of the equipment, and ensuring the normal operation and use effect of the electric steering pump.

[0043] In some embodiments of the present invention, referring to Figure 2 , Figure 3 and Figure 4 , a spline hole 122 is provided on the first end of the motor shaft 12, an external spline 221 matching the spline hole 122 is provided on the first end of the pump shaft 22, and the external spline 221 of the pump shaft 22 is connected to the spline hole 122. In other embodiments, an external spline 221 may be provided on the first end of the motor shaft 12, a spline hole 122 matching the external spline 221 is provided on the first end of the pump shaft 22, and the external spline 221 of the motor shaft 12 is connected to the spline hole 122.

[0044] For example, referring to the figure, a spline hole 122 is provided on the right end of the motor shaft 12, and an external spline 221 matching the spline hole 122 is provided on the left end of the pump shaft 22, and the external spline 221 of the pump shaft 22 is connected to the spline hole 122. Through the close fit between the spline hole 122 and the external spline 221, the connection structure between the motor 1 and the hydraulic oil pump 2 is made more compact, which facilitates the installation and disassembly of the motor shaft 12 and the pump shaft 22, and reduces the time and cost of installation and disassembly.

[0045] In some embodiments of the present invention, referring to Figure 2 , Figure 3 and Figure 4A baffle 111 is provided in the through hole, a first oil seal 112 is provided on the side of the baffle 111 close to the hydraulic oil pump 2, a bearing 13 is provided on the side of the baffle 111 away from the hydraulic oil pump 2, and the motor shaft 12 is connected to the first mounting portion 11 through the bearing 13. The baffle 111 can be provided in a circle around the inner wall of the through hole in the circumferential direction, or a plurality of baffles 111 can be provided at intervals around the inner wall of the through hole in the circumferential direction. In this way, by providing the baffle 111, the first oil seal 112 and the bearing 13 can be prevented from shifting. At the same time, the baffle 111 and the first oil seal 112 can prevent the material in the storage space 113 from entering the bearing 13, thereby protecting the normal operation of the bearing 13 and reducing the wear and maintenance cost of the bearing 13.

[0046] In some embodiments of the present invention, referring to Figure 2 , Figure 3 and Figure 4 , an annular stopper 121 is provided on the motor shaft 12, and the bearing 13 is arranged between the annular stopper 121 and the baffle 111. For example, referring to the figure, the annular stopper 121 is arranged on the left side of the bearing 13, and the baffle 111 is arranged on the right side of the bearing 13. In this way, the bearing 13 is arranged in the space between the annular stopper 121 and the baffle 111, which can ensure that the bearing 13 will not be displaced or fall off due to external force, ensure that the bearing 13 runs stably on the motor shaft 12, and improve the service life of the bearing 13 and the stability of the motor 1.

[0047] The contents described above can be implemented individually or in combination in various ways, and these variations are all within the protection scope of the present utility model.

[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. An electric power steering pump, characterized in that: The electric steering pump comprises a motor and a hydraulic oil pump; A first mounting portion is provided at a first end of the motor, a second mounting portion is provided at a second end of the hydraulic oil pump, and the second mounting portion is connected to the first mounting portion; A through hole is provided inside the first mounting portion, a first oil seal is provided in the through hole, a storage space is formed between the first oil seal and the second mounting portion, and a lubrication portion is provided in the storage space; One end of the motor shaft of the motor passes through the through hole and the first oil seal and is arranged in the storage space. The pump shaft of the hydraulic oil pump passes through the second mounting portion and is connected to the motor shaft in the storage space.

2. The electric power steering pump according to claim 1, characterized in that: A mounting groove is provided in the second mounting portion, a second oil seal is provided in the mounting groove, and the storage space is provided between the first oil seal and the second oil seal.

3. The electric power steering pump according to claim 2, characterized in that: A fixing groove is further provided in one end of the first mounting portion close to the hydraulic oil pump, and the fixing groove is communicated with the through hole; A fixing boss is provided at one end of the second mounting portion close to the motor, and the fixing boss is plugged into the fixing groove.

4. The electric power steering pump according to claim 3, characterized in that: The cross-sectional diameter of the through hole is smaller than the cross-sectional diameter of the fixing boss, the cross-sectional diameter of the through hole is larger than the cross-sectional diameter of the mounting groove, and the storage space is entirely located in the through hole.

5. The electric power steering pump according to claim 3, characterized in that: The outer ring of the second mounting portion is provided with a connecting portion, the connecting portion is provided with a first fixing hole, the first mounting portion is provided with a second fixing hole matched with the first fixing hole, and the first fixing hole and the second fixing hole are fixedly connected by bolts.

6. The electric power steering pump according to claim 5, characterized in that: The end surface of the fixing boss is in contact with the bottom of the fixing groove, the outer side wall of the fixing boss is in contact with the inner side wall of the fixing groove, and the end surface of the connecting portion is in contact with the end surface of the first mounting portion.

7. The electric power steering pump according to claim 5, characterized in that: A sealing groove is provided at a connection point between the first mounting portion and the connecting portion along an outer side wall of the first mounting portion, and a first sealing ring is provided in the sealing groove.

8. The electric power steering pump according to any one of claims 1 to 7, characterized in that: The first end of the motor shaft is provided with a spline hole, the first end of the pump shaft is provided with an external spline matching the spline hole, and the external spline of the pump shaft is connected to the spline hole, or, An external spline is arranged on the first end of the motor shaft, a spline hole matching the external spline is arranged on the first end of the pump shaft, and the external spline of the motor shaft is connected to the spline hole.

9. The electric power steering pump according to any one of claims 1 to 7, characterized in that: A baffle is provided in the through hole, the first oil seal is arranged on a side of the baffle close to the hydraulic oil pump, a bearing is provided on a side of the baffle away from the hydraulic oil pump, and the motor shaft is connected to the first mounting portion through the bearing.

10. The electric power steering pump according to claim 9, characterized in that: An annular stopper is provided on the motor shaft, and the bearing is arranged between the annular stopper and the baffle.

Images