Speed reducer for electric power steering device

Abstract

The utility model provides a speed reducer for an electric power steering device, which belongs to the field of speed reducers and comprises a speed reducer shell, a speed reducing main body is arranged in the speed reducer shell, and the top of the speed reducer shell is connected with the bottom of a prime motor shell through a connecting component. The fixing ring and the butt joint ring are clamped in a sliding mode, the multiple inserting grooves correspond to the multiple butt joint clamping blocks, the fixing ring is rotated to enable the multiple butt joint clamping blocks to be clamped with the multiple clamping grooves, and primary fixing of the speed reducer shell and the prime motor shell is achieved; and the moving ring drives a plurality of inserting blocks to sequentially penetrate through a plurality of penetrating grooves and inserting grooves to limit and fix a plurality of butt-joint clamping blocks, drives a plurality of clamping rods to be clamped with a plurality of clamping holes, extrudes a plurality of springs and pushing blocks in the clamping rods, and is matched with a plurality of limiting blocks to be clamped with a plurality of limiting grooves, so that stable connection of joints is ensured.

Description

Technical Field

[0001] The utility model relates to the field of speed reducers, in particular to a speed reducer for an electric power steering device. Background Art

[0002] The reducer plays the role of matching the speed and transmitting torque between the prime mover and the working machine or the actuator. It is widely used in modern machinery. The reducer is a relatively precise machine. The purpose of using it is to reduce the speed and increase the torque. After searching, the application number CN202123381314.5 disclosed a reducer for an electric steering device, which records that it includes a reducer housing, a prime mover housing is provided on one side of the reducer housing, and a plurality of fixed plates are fixed on the side of the reducer housing close to the prime mover housing. A plurality of side plates are fixed on the outside of the prime mover housing, and a first slide groove is provided in the middle of one side of the plurality of fixed plates, and the side plates slide in cooperation with the corresponding first slide groove. The inside of the slide groove and the inside of the side plate are provided with a first slot, the inside of the fixed plate is provided with a second slide groove, and the inside of the second slide groove is slidably connected to a fixed block. Through the setting of the fixed block, the side plate and the first slot, the handle is held to move the moving rod, and when the moving rod moves, the fixed block is driven to move, so that the fixed block is embedded in the inside of the first slot, so that the fixed block fixes the side plate. This fixing method does not require the aid of external tools, but the above description still has the following defects in actual use: the device is not easy to install and disassemble during use, and the surface of the connection lacks a protective structure. Therefore, it is necessary to design a practical and safe reducer for the electric power steering device. Utility Model Content

[0003] The purpose of the present utility model is to provide a speed reducer for an electric power steering device to solve the problems raised by the above background technology.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: a reducer for an electric power steering device, comprising a reducer housing, a reduction body being provided inside the reducer housing, the top of the reducer housing being mounted and connected to the bottom of a prime mover housing via a connecting assembly, and a protective limit assembly being provided on the side of the top of the reducer housing;

[0005] A connecting assembly, the connecting assembly comprising a fixing ring mounted on the top of the reducer housing, a plurality of slots being provided on the edge of the inner wall of the fixing ring, a plurality of slots being provided on one side of the inner walls of the slots, the inner wall of the fixing ring being engaged with the surface of a docking ring provided on the bottom of the prime mover housing, the inner walls of the plurality of slots being interlaced with the plurality of docking blocks on the surface of the docking ring, the surfaces of the plurality of docking blocks being engaged with the inner walls of the plurality of slots;

[0006] The protective limit assembly includes several limit rods installed on the top side of the reducer housing, the surfaces of several of the limit rods are covered with protective covers, the tops of several of the limit rods are provided with adjustment knobs, the surface of the protective cover is provided with an annular groove, the inner wall of the annular groove is provided with several protective steel bars, and the inner wall of the protective cover is slidably engaged with the surface of the fixing ring.

[0007] As a preferred solution of the present invention: a fixed plate is provided on the side of the top of the docking ring, and a plurality of through grooves are opened on the side of the fixed plate. The inner walls of the plurality of through grooves are interlaced and connected with the plurality of plug-in blocks provided at the bottom of the movable ring, and the surfaces of the bottom ends of the plurality of plug-in blocks are snap-fitted and connected with the inner walls of the plurality of slots.

[0008] As a preferred solution of the present invention: a plurality of limiting grooves are provided on the edge of the top of the movable ring, and the inner walls of the plurality of limiting grooves are engaged with a plurality of limiting blocks provided on the edge of the inner wall of the protective cover.

[0009] As a preferred solution of the present invention: a plurality of clamping rods are provided at the bottom of the movable ring, the surfaces of a plurality of the clamping rods are clamped and connected with a plurality of clamping holes provided at the top of the fixed plate, the bottoms of the inner walls of a plurality of the clamping holes are fixedly connected with the push blocks through springs, and the tops of a plurality of the push blocks are in contact with the bottoms of a plurality of the clamping rods.

[0010] As a preferred solution of the present invention: gripping handles are provided on both sides of the top of the movable ring.

[0011] As a preferred solution of the present invention: a plurality of through holes are opened on the top of the protective cover, and the inner walls of the plurality of through holes are interlaced and connected with the surfaces of the plurality of limiting rods.

[0012] As a preferred solution of the present invention: a plurality of mounting holes are opened on the side of the top of the reducer housing, and the inner walls of the plurality of mounting holes are threadedly connected to the bottom ends of the plurality of limiting rods.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] (1) By sliding the inner wall of the fixing ring and the surface of the docking ring together, the inner walls of the plurality of slots are aligned with the plurality of docking blocks, and then the fixing ring is rotated so that the plurality of docking blocks are engaged with the inner walls of the plurality of slots, the fixed plate and the fixing ring are fixed in a limited position, and the reducer housing and the prime mover housing are initially fixed. The moving ring drives the plurality of plug-in blocks to pass through the plurality of through slots and slots in sequence, thereby limiting and fixing the plurality of docking blocks, and drives the plurality of clamping rods at the bottom to engage with the plurality of clamping holes at the top of the fixing plate, squeezing the plurality of springs and push blocks inside thereof, and engaging the plurality of limiting blocks with the plurality of limiting slots, thereby ensuring the connection stability of the connection. When replacement is required, the elasticity of the plurality of springs is used to assist in the disassembly structure.

[0015] (2) By connecting a plurality of limit rods with a plurality of mounting holes on the top of the reducer housing, the protective cover is placed on the surface of the plurality of limit rods, the plurality of limit blocks on the inner wall of the protective cover are engaged with the plurality of limit grooves on the side of the fixed plate, and the structure of the connection is limited and engaged with a plurality of adjustment knobs. The protective cover cooperates with the plurality of protective steel bars on the inner wall of the annular groove to protect the structure of the connection, thereby improving the protection of the connection between the reducer housing and the prime mover housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 This is one of the structural diagrams of the present utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the connection assembly of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the protective limit assembly of the utility model.

[0020] In the figure: 1. Reducer housing; 11. Prime mover housing; 12. Docking ring; 13. Docking block; 14. Fixing plate; 15. Through slot; 16. Moving ring; 17. Insert block; 18. Limiting slot; 19. Connecting rod; 110. Connecting hole; 111. Spring; 112. Push block; 113. Handle; 114. Mounting hole.

[0021] 2. Connecting assembly; 21. Fixing ring; 22. Slot; 23. Card slot;

[0022] 3. Protective limit assembly; 31. Limit rod; 32. Protective cover; 33. Adjustment knob; 34. Annular groove; 35. Protective steel bar; 36. Limit block; 37. Through hole. DETAILED DESCRIPTION

[0023] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0024] See also Figure 1 - Figure 4 A speed reducer for an electric power steering device includes a speed reducer housing 1, a speed reducer body is provided inside the speed reducer housing 1, the top of the speed reducer housing 1 is connected to the bottom of the prime mover housing 11 through a connecting component 2, and a protective limit component 3 is provided on the side of the top of the speed reducer housing 1;

[0025] See also Figure 3 , connecting component 2, the connecting component 2 includes a fixed ring 21 installed on the top of the reducer housing 1, and a plurality of slots 22 are provided on the edge of the inner wall of the fixed ring 21. A card slot 23 is provided on one side of the inner wall of the plurality of slots 22. The inner wall of the fixed ring 21 is engaged with the surface of the docking ring 12 provided at the bottom of the prime mover housing 11, and the inner walls of the plurality of slots 22 are interlaced with the plurality of docking blocks 13 on the surface of the docking ring 12. The surfaces of the plurality of docking blocks 13 are engaged with the inner walls of the plurality of card slots 23.

[0026] When in use, the inner wall of the fixing ring 21 is slidably engaged with the surface of the docking ring 12, and the inner walls of the several slots 22 are aligned with the several docking blocks 13. Then, the fixing ring 21 is rotated so that the several docking blocks 13 are engaged with the inner walls of the several slots 23, completing the limit fixation of the fixing plate 14 and the fixing ring 21, and realizing the preliminary fixation of the reducer housing 1 and the prime mover housing 11. The moving ring 16 drives the several inserting blocks 17 to pass through the several through slots 15 and the slots 22 in turn, thereby limiting and fixing the several docking blocks 13, and driving the several clamping rods 19 at the bottom to engage with the several clamping holes 110 at the top of the fixing plate 14, squeezing the several springs 111 and the pushing block 112 inside it, cooperating with the several limit blocks 36 to engage with the several limit slots 18, thereby ensuring the stability of the connection at the connection. When replacement is required, the elasticity of the several springs 111 is cooperated to provide assistance for the disassembly structure.

[0027] See also Figure 4, the protective limit assembly 3, the protective limit assembly 3 includes several limit rods 31 installed on the top side of the reducer housing 1, the surfaces of several limit rods 31 are covered with protective covers 32, the tops of several limit rods 31 are provided with adjusting knobs 33, the surface of the protective cover 32 is provided with an annular groove 34, the inner wall of the annular groove 34 is provided with several protective steel bars 35, the inner wall of the protective cover 32 is slidably engaged with the surface of the fixing ring 21.

[0028] During specific use: several limit rods 31 are connected to several mounting holes 114 on the top of the reducer housing 1, and the protective cover 32 is sleeved on the surface of the several limit rods 31. Several limit blocks 36 on the inner wall of the protective cover 32 are engaged with several limit grooves 18 on the side of the fixed plate 14, and several adjusting knobs 33 are used to limit and engage the structure of the connection. The protective cover 32 cooperates with several protective steel bars 35 on the inner wall of the annular groove 34 to protect the structure of the connection, thereby improving the protection of the connection between the reducer housing 1 and the prime mover housing 11.

[0029] See also Figure 3 A fixed plate 14 is provided on the side of the top of the docking ring 12, and a plurality of through grooves 15 are opened on the side of the fixed plate 14. The inner walls of the plurality of through grooves 15 are connected with the plurality of plug-in blocks 17 provided at the bottom of the movable ring 16, and the surfaces of the bottom ends of the plurality of plug-in blocks 17 are engaged with the inner walls of the plurality of slots 22.

[0030] During specific use, the movable ring 16 drives the plurality of inserting blocks 17 to pass through the plurality of through slots 15 and the slots 22 in sequence, thereby limiting and fixing the plurality of docking card blocks 13 .

[0031] See also Figure 3 The edge of the top of the movable ring 16 is provided with a plurality of limiting grooves 18 , and the inner walls of the plurality of limiting grooves 18 are engaged with a plurality of limiting blocks 36 provided on the inner wall edge of the protective cover 32 .

[0032] During specific use, the plurality of limiting blocks 36 on the inner wall of the protective cover 32 engage with the plurality of limiting grooves 18 on the side of the fixing plate 14 , and cooperate with the plurality of adjusting knobs 33 to limit and engage the structure of the connection.

[0033] See also Figure 3 A plurality of clamping rods 19 are provided at the bottom of the movable ring 16. The surfaces of the plurality of clamping rods 19 are clamped and connected with a plurality of clamping holes 110 opened at the top of the fixed plate 14. The bottoms of the inner walls of the plurality of clamping holes 110 are fixedly connected with the push blocks 112 through springs 111, and the tops of the plurality of push blocks 112 are in contact with the bottoms of the plurality of clamping rods 19.

[0034] During specific use: the moving ring 16 drives several plug-in blocks 17 to pass through several through slots 15 and slots 22 in turn, thereby limiting and fixing several docking blocks 13, and driving several clamping rods 19 at the bottom to engage with several clamping holes 110 on the top of the fixed plate 14, squeezing several springs 111 and push blocks 112 inside thereof, and cooperating with several limiting blocks 36 to engage with several limiting slots 18, thereby ensuring the stability of the connection at the connection. When replacement is required, the elasticity of several springs 111 provides auxiliary function for the disassembly structure.

[0035] See also Figure 3 , gripping handles 113 are provided on both sides of the top of the moving ring 16 .

[0036] During specific use, the two gripping handles 113 on both sides of the top of the moving ring 16 facilitate the disassembly and installation of the device structure.

[0037] See also Figure 4 A plurality of through holes 37 are formed on the top of the protective cover 32 , and the inner walls of the plurality of through holes 37 are interlaced with the surfaces of the plurality of limiting rods 31 .

[0038] During specific use, the inner walls of the plurality of through holes 37 on the top of the protective cover 32 are interlaced and connected with the surfaces of the plurality of limiting rods 31 , thereby facilitating the installation and removal of the protective cover 32 .

[0039] See also Figure 3 A plurality of mounting holes 114 are opened on the side of the top of the reducer housing 1 , and the inner walls of the plurality of mounting holes 114 are threadedly connected to the bottom ends of the plurality of limiting rods 31 .

[0040] During specific use, the bottom ends of the plurality of limiting rods 31 are threadedly connected to the inner walls of the plurality of mounting holes 114 , thereby facilitating installation and removal of the limiting rods 31 from the reducer housing 1 .

[0041] When in use, the inner wall of the fixing ring 21 is slidably engaged with the surface of the docking ring 12, and the inner walls of the plurality of slots 22 are matched with the plurality of docking blocks 13, and then the fixing ring 21 is rotated so that the plurality of docking blocks 13 are engaged with the inner walls of the plurality of slots 23, completing the limited fixation of the fixing plate 14 and the fixing ring 21, and realizing the preliminary fixation of the reducer housing 1 and the prime mover housing 11, and the moving ring 16 drives the plurality of plug-in blocks 17 to pass through the plurality of through slots 15 and the slots 22 in turn, limiting and fixing the plurality of docking blocks 13, and driving the plurality of clamping rods 19 at the bottom to engage with the plurality of clamping holes 110 at the top of the fixing plate 14, squeezing the plurality of springs 111 and the push block 112 inside it, and cooperating with A number of limit blocks 36 are engaged with a number of limit grooves 18 to ensure the stability of the connection at the connection. When replacement is required, the elasticity of a number of springs 111 provides auxiliary function for the disassembly structure; a number of limit rods 31 are connected to a number of mounting holes 114 on the top of the reducer housing 1, and the protective cover 32 is sleeved on the surface of the number of limit rods 31. The number of limit blocks 36 on the inner wall of the protective cover 32 are engaged with a number of limit grooves 18 on the side of the fixed plate 14, and the structure of the connection is limited and engaged with a number of adjusting knobs 33. The protective cover 32 cooperates with a number of protective steel bars 35 on the inner wall of the annular groove 34 to protect the structure of the connection, thereby improving the protection of the connection between the reducer housing 1 and the prime mover housing 11.

[0042] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A speed reducer for an electric power steering device, characterized in that: The invention comprises a reducer housing (1), wherein a reduction main body is provided inside the reducer housing (1), the top of the reducer housing (1) is connected to the bottom of a prime mover housing (11) via a connecting assembly (2), and a protective limit assembly (3) is provided on the side of the top of the reducer housing (1); A connecting assembly (2), the connecting assembly (2) comprising a fixing ring (21) mounted on the top of the reducer housing (1), a plurality of slots (22) being provided on the edge of the inner wall of the fixing ring (21), a plurality of card slots (23) being provided on one side of the inner wall of the plurality of slots (22), the inner wall of the fixing ring (21) being engaged with the surface of a docking ring (12) provided at the bottom of the prime mover housing (11), the inner walls of the plurality of slots (22) being interlaced with the plurality of docking card blocks (13) on the surface of the docking ring (12), and the surfaces of the plurality of docking card blocks (13) being engaged with the inner walls of the plurality of card slots (23); A protective limit assembly (3) includes a plurality of limit rods (31) mounted on the top side of the reducer housing (1), a protective cover (32) is provided on the surface of the plurality of limit rods (31), an adjustment knob (33) is provided on the top of the plurality of limit rods (31), an annular groove (34) is provided on the surface of the protective cover (32), a plurality of protective steel bars (35) are provided on the inner wall of the annular groove (34), and the inner wall of the protective cover (32) is slidably engaged with the surface of the fixing ring (21).

2. A speed reducer for an electric power steering device according to claim 1, characterized in that: A fixing plate (14) is provided on the side of the top of the docking ring (12), and a plurality of through grooves (15) are provided on the side of the fixing plate (14). The inner walls of the plurality of through grooves (15) are connected to a plurality of plug-in blocks (17) provided on the bottom of the movable ring (16) through insertion, and the surfaces of the bottom ends of the plurality of plug-in blocks (17) are connected to the inner walls of the plurality of slots (22) by snapping.

3. A speed reducer for an electric power steering device according to claim 2, characterized in that: The edge of the top of the movable ring (16) is provided with a plurality of limiting grooves (18), and the inner walls of the plurality of limiting grooves (18) are engaged with a plurality of limiting blocks (36) provided on the inner wall edge of the protective cover (32).

4. A speed reducer for an electric power steering device according to claim 3, characterized in that: The bottom of the movable ring (16) is provided with a plurality of clamping rods (19), the surfaces of the plurality of clamping rods (19) are clamped and connected with a plurality of clamping holes (110) provided on the top of the fixed plate (14), the bottoms of the inner walls of the plurality of clamping holes (110) are fixedly connected with the push blocks (112) through springs (111), and the tops of the plurality of push blocks (112) are in contact with the bottoms of the plurality of clamping rods (19).

5. The speed reducer for an electric power steering device according to claim 3, wherein: Both sides of the top of the movable ring (16) are provided with gripping handles (113).

6. The speed reducer for an electric power steering device according to claim 1, characterized in that: The top of the protective cover (32) is provided with a plurality of through holes (37), and the inner walls of the plurality of through holes (37) are interlaced and connected with the surfaces of the plurality of limiting rods (31).

7. The speed reducer for an electric power steering device according to claim 1, wherein: A plurality of mounting holes (114) are provided on the side of the top of the reducer housing (1), and the inner walls of the plurality of mounting holes (114) are threadedly connected to the bottom ends of the plurality of limiting rods (31).

Images