Modular separable transmission mechanism housing and worm and worm gear assembly structure

Abstract

The present invention discloses a modular separable transmission mechanism housing and a worm and worm gear assembly structure. The transmission mechanism housing includes: a housing module, an end cover, and a bearing support module; the housing module is used to accommodate a worm and a worm gear; the end cover is connected to the housing module and is used to connect to the vehicle; the bearing support module is connected to the housing module and is used to install bearings. The worm and worm gear assembly structure includes the above-mentioned transmission mechanism housing. By separately arranging the end cover and the bearing support module for connecting to the vehicle relative to the housing module that accommodates the worm and the worm gear, the transmission mechanism housing realizes that only the end cover and the bearing seat support module need to be changed during the assembly of different vehicles, without the need to redesign the entire housing, facilitating vehicle assembly and reducing production costs.

Description

[0001] This application claims the priority of Chinese Patent Applications 201921212066.1 and 201921212612.1 with the filing date of July 30, 2019. This application incorporates the entire texts of the above-mentioned Chinese patent applications by reference. Technical Field

[0002] The present invention relates to the technical field of automotive steering systems, and particularly to a modular separable transmission mechanism housing and a worm and worm gear assembly structure. Background Art

[0003] In the current column-type electric power steering design, the housing design is mainly used to internally support the worm and worm gear transmission mechanism, and externally connect to the vehicle steering column bracket and the motor. However, due to the influence of the vehicle interface dimensions, different housings need to be designed for different designs, resulting in a generally complex structure of the housing and poor versatility. The small end of the worm on the outer housing directly adopts a closed / semi-closed structure, which is not conducive to the assembly of the pre-tightening structure to a certain extent.

[0004] Moreover, due to reasons such as manufacturing tolerances and installation errors of parts, problems such as excessive frictional torque or excessive free clearance exist, ultimately resulting in excessive rotational frictional torque, which affects the steering feel, or knocking noise of the worm and worm gear when driving on a bad road. Current solutions include the bracket bearing solution, adding a separate compression spring at one end of the worm, etc., but all have many disadvantages, such as: tolerance accumulation caused by too many parts, insufficient robustness; too high requirements for the processing technology of parts, resulting in too high costs; too high requirements for the processing accuracy of parts, resulting in unstable quality, etc.

[0005] Therefore, it is very necessary to design a simple structure that can better adjust the worm and worm gear assembly structure. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the above-mentioned defects of the prior art and provide a modular separable transmission mechanism housing and a worm and worm gear assembly structure.

[0007] The present invention solves the above technical problems through the following technical solutions:

[0008] A modular separable transmission mechanism housing, which includes: a housing module, an end cover, and a bearing support module;

[0009] The housing module is used to accommodate a worm and a worm gear;

[0010] The end cover is connected to the housing module and is used to connect to the vehicle;

[0011] The bearing support module is connected to the housing module and is used to install bearings.

[0012] Preferably, the end cover is used to be fixed to the cross beam of the whole vehicle.

[0013] Preferably, the housing module includes a worm wheel housing and a worm housing, and the worm wheel housing and the worm housing are connected to each other and communicate with each other;

[0014] Wherein, the end cover is connected to the worm wheel housing, and the bearing support module is connected to the worm housing.

[0015] Preferably, the housing module further includes a connecting steering column bracket housing;

[0016] Wherein, one end of the worm housing is fixed to the connecting steering column bracket housing, and the bearing support module is fixed to the other end of the worm housing.

[0017] Preferably, an installation through hole is formed in the end cover, and a metal ring is press-fitted in the installation through hole with interference, and a fastening member penetrates through the metal ring to fix the end cover on the surface of the worm wheel housing.

[0018] Preferably, the end cover is a "C"-shaped member and is arranged around the installation hole of the worm wheel housing.

[0019] Preferably, the bearing support module includes an annular frame and a connecting portion arranged outside the frame, and the bearing support module is fixed to the worm housing through the connecting portion.

[0020] Preferably, the inner hole of the frame is a square hole or a circular hole.

[0021] A worm and worm wheel assembly structure, which includes: a worm wheel, a worm, and the modular separable transmission mechanism housing as described above, and the worm wheel and the worm are installed in the housing module.

[0022] Preferably, the worm and worm wheel assembly structure further includes a pre-tightening structure, and the pre-tightening structure is installed in the bearing support module.

[0023] Preferably, the pre-tightening structure is installed at the small end of the worm.

[0024] Preferably, the pre-tightening structure includes: a bearing bushing and a bearing installed in the bearing bushing.

[0025] Preferably, the bearing bushing includes a bushing body and a buffer member fixed to the bushing body.

[0026] Preferably, the buffer member includes: a top elastic pad fixed to the top surface of the bearing bushing and side elastic pads fixed to the two side surfaces of the bearing bushing.

[0027] Preferably, the buffer further includes a spring piece, and the spring piece is disposed between the bushing body and the bearing support module.

[0028] Preferably, the spring piece includes a fixed portion and an extending portion. The extending portion extends outward from two opposite sides of the fixed portion. The fixed portion is fixed to the top surface of the bushing body, and the extending portion extends obliquely downward from the fixed portion.

[0029] Preferably, the fixed portion is a flat plate-like structure.

[0030] Preferably, the spring piece includes a fixed portion and an extending portion. The extending portion extends outward from two opposite sides of the fixed portion and abuts against the bushing body, and the fixed portion is fixed to the bearing support module.

[0031] Preferably, one end of the extending portion away from the fixed portion is bent inward to form a bent portion, and the bent portion abuts against both sides of the bushing body.

[0032] Preferably, the fixed portion is a C-shaped clip portion, and the C-shaped clip portion clamps the bearing support module.

[0033] Preferably, a contact protrusion is provided at one end of the extending portion away from the fixed portion.

[0034] Preferably, a pendulum bearing is installed at the large end of the worm.

[0035] A modular separable transmission mechanism housing includes: a housing module, a plastic end cover, and a bearing support module; the housing module includes a worm wheel housing, a worm housing, and a connecting steering column bracket housing. The worm housing is fixed above the worm wheel housing, and one end of the worm housing is fixed to the connecting steering column bracket housing. The worm housing is in communication with the worm wheel housing and the connecting steering column bracket housing. An installation through hole is provided on the plastic end cover, and a metal ring is press-fitted with interference inside the installation through hole. A self-tapping screw passes through the metal ring to fix the plastic end cover on the surface of the worm wheel housing. The other end of the worm housing is fixed with the bearing support module by screws.

[0036] Preferably, the inner hole of the bearing support module is a square hole or a circular hole.

[0037] A worm gear and worm assembly structure includes: a worm gear, a worm, a pre-tightening structure, and a housing. The housing is a separable housing, which includes a worm gear housing, a worm housing, a connecting bracket housing, a plastic end cover, and a bearing support module. The worm housing is fixed above the worm gear housing. One end of the worm housing is fixed to the connecting bracket housing. The worm housing is in communication with the worm gear housing and the connecting bracket housing. The plastic end cover is fixedly installed on the worm gear housing. The other end of the worm housing is connected to the bearing support module by screws. The worm gear is installed in the worm gear housing, and the worm is installed in the worm housing. The worm gear and the worm are meshed with each other. The connecting bracket housing is connected to the steering column bracket. A pre-tightening structure is provided at one end of the worm, and a pendulum bearing is sleeved on the other end of the worm.

[0038] Preferably, an installation through hole is provided on the plastic end cover, and a metal ring is press-fitted with interference inside the installation through hole. A self-tapping screw passes through the metal ring to fix the plastic end cover on the surface of the worm gear housing.

[0039] Preferably, the pre-tightening structure includes a bearing and a bearing bushing;

[0040] The bearing is sleeved on the worm, and the bearing bushing is sleeved on the bearing. The bearing bushing includes a housing, a rubber pad, and a spring piece. The rubber pad is divided into a top rubber pad and a side rubber pad. The top rubber pad is injection-molded on the top of the housing, and the side rubber pads are injection-molded on both sides of the housing. The spring piece is installed on the housing.

[0041] Preferably, the spring piece includes a middle part and two wings. The two wings are respectively fixed on both sides of the middle part by transition areas. The middle part is a planar rectangle, and the two wings are downwardly inclined strips. Concave spring pieces are respectively fixed at the free ends of the two wings.

[0042] Preferably, the middle part of the spring piece is fixed on the raised platform of the housing by the top rubber pad.

[0043] Preferably, the spring piece is composed of a C-shaped clip part and two wing hypotenuses. The outer edge of the upper piece of the C-shaped clip part is upturned to form an upturned piece. The two ends of the lower piece of the C-shaped clip part are respectively connected to the tops of the two wing hypotenuses. The bottom ends of the two wing hypotenuses are bent inward to form a bent part.

[0044] Preferably, the C-shaped clip part of the spring piece is inlaid and fixed on the worm housing, and the bent part is in close fit with the housing, so that the C-shaped clip part is suspended and fixed above the top rubber pad.

[0045] Preferably, the top rubber pad is circular, and the side rubber pad is "concave" shaped.

[0046] Preferably, the spring piece is a leaf spring.

[0047] Preferably, the inner hole of the bearing support module is a square hole or a circular hole.

[0048] The positive and progressive effects of the present invention are as follows: By separately providing an end cover and a bearing support module for connecting to the whole vehicle relative to the housing module that houses the worm gear and the worm, when assembling different whole vehicles, only the end cover and the bearing seat support module need to be changed, and there is no need to redesign the entire housing, which facilitates the assembly of the whole vehicle and reduces the production cost.

[0049] Compared with the prior art, in the assembly of different whole vehicles, only the plastic end cover and the bearing seat support module need to be changed, and there is no need to redesign the entire housing, which facilitates the assembly of the whole vehicle and reduces the production cost.

[0050] Compared with the prior art, the present invention adjusts the pre-tightening device from the large end of the worm to the small end of the worm, and redesigns the bearing bushing of the pre-tightening device, which greatly reduces the requirements for the processing technology of parts. The elastic coefficient of the leaf spring is also more convenient to control, so that the pre-tightening effect of the worm gear and worm can be better adjusted, the frictional torque can be reduced, and the risk of meshing noise of the worm gear and worm under various working conditions can be reduced. The split worm gear and worm housing facilitates the assembly of the whole vehicle. When assembling different whole vehicles, only the plastic end cover and the bearing seat support module need to be changed, and there is no need to redesign the entire housing, reducing the production cost. Brief Description of the Drawings

[0051] Figure 1 It is a three-dimensional structural schematic diagram of the transmission mechanism housing according to Embodiment 1 of the present invention.

[0052] Figure 2 It is an exploded structural schematic diagram of the transmission mechanism housing according to Embodiment 1 of the present invention.

[0053] Figure 3 It is Figure 1 a cross-sectional structural schematic diagram at A of

[0054] Figure 4 It is Figure 1 a cross-sectional structural schematic diagram at B of

[0055] Figure 5 It is a structural schematic diagram of the worm gear and worm assembly structure according to Embodiment 2 of the present invention.

[0056] Figure 6 It is another structural schematic diagram of the worm gear and worm assembly structure according to Embodiment 2 of the present invention.

[0057] Figure 7 Schematic three-dimensional structure diagram of a bearing bush according to Embodiment 2 of the present invention.

[0058] Figure 8 is Figure 7 Schematic three-dimensional structure diagram of the spring piece in

[0059] Figure 9 Graph showing the relationship between the compression amount and force of the spring piece according to Embodiment 2 of the present invention.

[0060] Figure 10 Schematic three-dimensional structure diagram of a bearing bush according to Embodiment 3 of the present invention.

[0061] Figure 11 is Figure 10 Schematic three-dimensional structure diagram of the spring piece in Detailed implementation manners

[0062] The present invention will be further described below in conjunction with the accompanying drawings by way of embodiments, but the present invention is not limited to the scope of the described embodiments.

[0063] Embodiment 1

[0064] Refer to Figures 1-4 , this embodiment provides a modular separable transmission mechanism housing, which includes a housing module, a plastic end cover, and a bearing support module. The housing module 4 includes a worm housing 4-1, a worm gear housing 4-2, and a connecting steering column bracket housing 4-3. The worm gear housing 4-2 is fixed above the worm housing 4-1, and one end of the worm gear housing 4-2 is fixed to the connecting steering column bracket housing 4-3. The worm gear housing 4-2 is in communication with the worm housing 4-1 and the connecting steering column bracket housing 4-3. The plastic end cover 3 is provided with an installation through hole, and a metal ring 2 is press-fitted with interference inside the installation through hole. A self-tapping screw 1 passes through the metal ring 2 to fix the plastic end cover 3 on the surface of the worm housing 4-1. The other end of the worm gear housing 4-2 is fixed with a bearing support module 5 by a screw 6.

[0065] In this embodiment, the inner hole of the bearing support module 5 is an adjustable hole, that is, the shape of the inner hole can be adjusted by replacing the bearing support module, and can be a square hole, a circular hole, etc. The shape of the inner hole of the bearing support module 5 can be selected and adjusted according to the adopted bearing to facilitate the support and fixation of the bearing. In this embodiment, the material of the end cover is plastic, but alternatively, the end cover can also be made of other available existing materials, such as metal or alloy, etc.

[0066] In a specific implementation, first, the metal ring 2 is press-fitted with the plastic end cap 3 to achieve an interference fit, and then three self-tapping screws 1 are used to fix the plastic end cap 3 to the housing body 4. The press-fitted metal ring 2 is mainly used to bear the tightening torque of the self-tapping screws 1 and protect the plastic end cap 3. Those skilled in the art should understand that other fastening members can also be used to replace the self-tapping screws. For example, by providing internal threads in the metal ring 2, ordinary bolts or screws can be used to fix the plastic end cap. As Figure 2 shown, the plastic end cap 3 is a "C"-shaped member and is arranged around the mounting hole of the worm housing. This mounting hole is used for the connection and installation of the worm gear with an external structure.

[0067] See Figures 3-4 , the transmission mechanism housing of this embodiment does not require specially machining threaded holes on the housing body 4, and by using different plastic end cap 3 designs to meet different vehicle interface dimensions, the housing body 4 can remain unchanged and be applied to multiple projects. The plastic end cap 3 is used to connect with the vehicle, specifically fixed to the crossbeam of the vehicle.

[0068] The bearing support module 5 is fixed to the housing body 4 by three or four screws 6. In this way, without changing the external structure of the housing, according to the adopted bearings, the inner hole shape of the bearing support module 5 can be selected and adjusted, so that the internally assembled bearings can obtain different-direction preloading forces to constrain the worm and worm gear transmission mechanism.

[0069] As Figure 2 shown, the bearing support module 5 includes an annular frame 51 and a connecting portion 52 provided on the outside of the frame. The bearing support module 5 is fixed to the worm housing 4-2 through the connecting portion 52. The connecting portion 52 is provided with a connecting hole, and the screw 6 passes through this connecting hole to install the bearing support module 5 on the worm housing 4-2.

[0070] The transmission mechanism housing of this embodiment adopts a modular design. Different vehicle models can be matched with different plastic end caps and bearing seat support modules, while the housing body part remains unchanged, greatly reducing design variants, lowering labor costs and parts procurement costs, with flexible design for convenient management. Since the housing body part remains unchanged, it can be applied to multiple projects, greatly reducing the development cycle and shortening the project cycle; changing the entire complex housing design to a modular housing composed of several small parts currently can simplify the mold design of suppliers, greatly reduce the housing manufacturing difficulty, greatly improve the product qualification rate, and improve the quality stability and robustness; the detachable bearing seat support module can provide different preloading forces for the bearings by changing the support design structure and is beneficial to the assembly of the bearing seat.

[0071] Embodiment 2

[0072] See Figures 5-9, this embodiment provides a worm and worm gear assembly structure, including: a worm gear, a worm, a pre-tightening structure, and a housing. The housing (housing module) is a separable housing, including a worm gear housing 1, a worm housing 2, a connecting bracket housing 3, a plastic end cap 4, and a bearing support module 5. The worm housing 2 is fixed above the worm gear housing 1. One end of the worm housing 2 is fixed to the connecting bracket housing 3. The worm housing 2 is in communication with the worm gear housing 1 and the connecting bracket housing 3. The plastic end cap 4 is installed and fixed on the worm gear housing 1. The other end of the worm housing 2 is connected to the bearing support module 5 by screws. The worm gear 6 is installed in the worm gear housing 1, and the worm 7 is installed in the worm housing 2. The worm gear 6 and the worm 7 are meshed with each other. The connecting bracket housing 3 is connected to the steering column bracket. A pre-tightening structure is provided at one end of the worm 7, and a pendulum bearing 8 is sleeved at the other end of the worm 7.

[0073] In this embodiment, an installation through hole is provided on the plastic end cap 4, and a metal ring 9 is press-fitted with interference inside the installation through hole. The self-tapping screw passes through the metal ring 9 to fix the plastic end cap 4 on the surface of the worm gear housing 1.

[0074] In this embodiment, the pre-tightening structure includes a bearing 10 and a bearing bushing 11. The bearing 10 is sleeved on the worm 7, and the bearing bushing 11 is sleeved on the bearing 10. The bearing bushing 11 includes a housing (bushing body) 11-1, a rubber pad, and a spring piece 11-2. The rubber pad is divided into a top rubber pad 11-3 and a side rubber pad 11-4. The top rubber pad 11-3 is injection-molded on the top of the housing 11-1, and the side rubber pad 11-4 is injection-molded on both sides of the housing 11-1. The spring piece 11-2 is installed on the housing 11-1. Both the rubber pad and the spring piece are buffer members for buffering. In this embodiment, a rubber pad is used, but alternatively, elastic pads made of other alternative materials can also be used to achieve buffering at the top and both sides of the bearing bushing. The spring piece is provided between the housing 11-1 and the bearing support module 5.

[0075] Figure 7 Schematically shows the bearing bushing of this embodiment. Among them, as Figure 7 and 8 shown, the spring piece 11-2 includes an intermediate part 11-2-1a (fixed part) and two wings 11-2-2a (extended parts). The two wings 11-2-2a are respectively fixed on both sides of the intermediate part 11-2-1a by a transition area. The intermediate part 11-2-1a is a planar rectangle, and the two wings 11-2-2a are downwardly inclined strips. Concave spring pieces 11-2-3a are respectively fixed at the free ends of the two wings 11-2-2a. The concave spring piece forms a protrusion (contact protrusion) on the surface facing the housing 11-1 through the concave. Through this protrusion, the contact area between the concave spring piece 11-2-3a and the housing can be reduced, thereby reducing the friction between them and facilitating the sliding of the concave spring piece 11-2-3a relative to the housing.

[0076] In this pre-tightening structure, the middle part 11-2-1a of the spring piece 11-2 is fixed on the raised platform by the top rubber pad 11-3. Specifically, the middle part 11-2-1a of the spring piece 11-2 is provided with a hole, and through the cooperation of the top rubber pad 11-3 and this hole, the spring piece 11-2 is fixed relative to the top rubber pad 11-3.

[0077] In this embodiment, the top rubber pad 11-3 is circular, and the side rubber pad 11-4 is in a "concave" shape. When the worm swings significantly left and right, the protrusions at both ends of the side rubber pad first contact the housing. Due to the small contact area and low stiffness, it provides the first-step buffering for the worm. When the worm continues to swing, finally, the large area of the middle part of the side rubber pad presses against the housing, providing buffering with a larger stiffness. Thus, the noise risk of the worm knocking against the housing is reduced in two steps, and at the same time, it also provides a hard limit point for the worm swing.

[0078] In this embodiment, the spring piece 11-2 is a leaf spring, and the relationship between its elastic force and displacement (compression amount or deformation amount) is shown in Figure 9 , different from the elastic force and displacement curves of other springs, when the compression displacement reaches a certain value, the compression stiffness will become smaller, as shown by the solid line in Figure 9 . This can ensure that within a large displacement range, the spring pre-tightening force is basically stable. During the assembly process, due to various cumulative tolerances, when the spring is assembled in place, the compression amount fluctuates greatly. If a general spring pre-tightening is used, the provided pre-tightening force will also fluctuate greatly and cannot well reach the preset pressing force, as shown by the dotted line in Figure 9 . Here, through this shaped spring, when the assembly tolerance is very large, the pre-tightening force can also be maintained within a predetermined range.

[0079] In this embodiment, the inner hole of the bearing support module 5 is an adjustable hole, which can be an inner hole with complex shapes such as a square hole or a circular hole.

[0080] In specific implementation, first, the metal ring is press-fitted with the plastic end cover for interference fit, and then 3 self-tapping screws are used to fix the plastic end cover and the worm housing. The press-fitted metal ring is mainly used to bear the tightening torque of the self-tapping screws and protect the plastic end cover.

[0081] Refer to Figures 5-9 , the worm of this embodiment does not need to specifically machine threaded holes on the housing, and by using different plastic end cover designs to meet different vehicle interface dimensions, the housing body can remain unchanged and be applied to multiple projects.

[0082] The bearing support module is fixed to the shell body 4 by 3 or 4 screws, so that the shell can adjust the inner hole shape of the bearing support module according to the adopted bearing without changing the external structure, so that the internally assembled bearing can obtain preload force in different directions to constrain the worm gear and worm transmission mechanism.

[0083] The shell of this embodiment adopts a modular design. Different car models can be matched with different plastic end covers and bearing seat support modules, while the main body of the shell remains unchanged, which greatly reduces design variations, reduces labor costs and parts procurement costs, and has a flexible design that facilitates management. Since the main body of the shell remains unchanged, it can be applied to multiple projects, greatly reducing the development cycle and shortening the project cycle; changing the entire complex shell design to a modular shell composed of several small parts can simplify the supplier's mold design, greatly reduce the difficulty of shell manufacturing, greatly improve the product qualification rate, and improve quality stability and robustness; the detachable bearing seat support module can provide different preload forces for the bearing by changing the design structure of the support, and is conducive to the assembly of the bearing seat.

[0084] The pendulum bearing in this embodiment has a large radial clearance, and the inner ring raceway adopts a special arc transition. When the worm gear is meshing, the pendulum bearing will effectively guide the worm to swing at a certain angle on its axis relative to the housing.

[0085] When installing the preload structure of this embodiment, the bearing bushing is completely inserted into the outer ring of the bearing at the small end of the worm, and then installed into the housing together. When the worm swings, the bearing bushing swings with it. When the worm swings left and right, the side rubber pads and spring sheets limit and buffer the movement; when the worm swings up and down, the upper end of the spring sheet supports the housing, and the two ends press on the housing, deforming under force, providing damping, and limiting its movement away from the worm wheel. In this embodiment, adjusting the preload device from the large end of the worm to the small end of the worm can achieve a better preload effect on the worm gear. A pendulum bearing is installed at the large end of the worm.

[0086] Example 3

[0087] This embodiment provides a worm gear assembly structure, which is substantially the same as the worm gear assembly structure of embodiment 2, except that:

[0088] like Figures 10-11 As shown, the spring sheet 11-2 of this embodiment is composed of a C-shaped clamp portion 11-2-1b (fixed portion) and two wing bevels 11-2-2b (extended portions), the outer edge of the upper sheet of the C-shaped clamp portion 11-2-1b is upwardly tilted to form a bend sheet 11-2-3b, the two ends of the lower sheet of the C-shaped clamp portion 11-2-1b are respectively connected to the top ends of the two wing bevels 11-2-2b, and the bottom ends of the two wing bevels 11-2-2b are bent inward to form a bent portion 11-2-4b.

[0089] In this embodiment, the C-shaped clamping portion 11-2-1b of the spring piece 11-2 is inlaid and fixed on the outer shell, and the bending portion 11-2-4b is in close fit with the housing 11-1, so that the C-shaped clamping portion 11-2-1b is suspended and fixed above the top rubber pad 11-3.

[0090] In specific implementation, the structure of the spring piece shown in Embodiment 2 or 3 can be selectively adopted. The structure of the spring piece shown in Embodiment 2 provides a pre-tightening force for left and right swing, while the spring piece shown in Embodiment 3 can not only provide a pre-tightening force for up and down swing, but also provide a pre-tightening force for left and right swing, allowing a certain range of free swing amplitude of the worm, and well restricting the sway of the worm, providing damping. At the same time, the required pre-tightening force can be adjusted by debugging the stiffness of the spring piece to meet the requirements of various worm and worm gear meshes.

[0091] In the description of the present invention, it should be understood that for the convenience of description, the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship or relative positional relationship shown in the drawings, that is, only the orientation or position or relative position of the component and device in the posture shown in the drawings, rather than indicating or implying that the device or element referred to must have the specific orientation, be constructed and operated in the specific orientation at any time and under any circumstances as described in the description of the present invention. Therefore, it cannot be understood as a limitation of the present invention in this regard.

[0092] Although the specific implementation manners of the present invention have been described above, those skilled in the art should understand that this is only an example, and the protection scope of the present invention is defined by the appended claims. Without departing from the principles and essence of the present invention, those skilled in the art can make various changes or modifications to these implementation manners, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A modular separable transmission mechanism housing, characterized in that, it includes: a housing module, an end cover, and a bearing support module; the housing module is used to accommodate a worm gear and a worm; the end cover is detachably connected to the housing module and is used to connect to the whole vehicle; the bearing support module is detachably connected to the housing module and is used to install bearings; the end cover is used to fix to the cross beam of the whole vehicle; the housing module includes a worm gear housing and a worm housing, and the worm gear housing and the worm housing are connected to each other and communicate with each other; wherein, the end cover is connected to the worm gear housing, and the bearing support module is connected to the worm housing; wherein, the end cover is provided with a pin shaft hole for fixing to the cross beam of the whole vehicle.

2. The modular separable transmission mechanism housing according to claim 1, characterized in that, the housing module further includes a connecting steering column bracket housing; wherein, one end of the worm housing is fixed to the connecting steering column bracket housing, and the bearing support module is fixed to the other end of the worm housing.

3. The modular separable transmission mechanism housing according to claim 1, characterized in that, the end cover is provided with a mounting through hole, and a metal ring is press-fitted with interference inside the mounting through hole, and a fastening member passes through the metal ring to fix the end cover on the surface of the worm gear housing.

4. The modular separable transmission mechanism housing according to claim 1, characterized in that, the end cover is a "C"-shaped member and is arranged around the mounting hole of the worm gear housing.

5. The modular separable transmission mechanism housing according to claim 1, characterized in that, the bearing support module includes an annular frame and a connecting portion arranged outside the frame, and the bearing support module is fixed to the worm housing through the connecting portion.

6. The modular separable transmission mechanism housing according to claim 5, characterized in that, the inner hole of the frame is a square hole or a circular hole.

7. A worm gear and worm assembly structure, characterized in that, it includes: a worm gear, a worm, and the modular separable transmission mechanism housing according to any one of claims 1-6, and the worm gear and the worm are installed in the housing module.

8. A modular separable transmission mechanism housing, including: a housing module, a plastic end cover, and a bearing support module; characterized in that the housing module includes a worm gear housing, a worm housing, and a connecting steering column bracket housing, the worm housing is fixed above the worm gear housing, one end of the worm housing is fixed to the connecting steering column bracket housing, and the worm housing is in communication with the worm gear housing and the connecting steering column bracket housing. The plastic end cover is provided with a mounting through hole, and a metal ring is press-fitted with interference inside the mounting through hole, and a self-tapping screw passes through the metal ring to fix the plastic end cover on the surface of the worm gear housing. The other end of the worm housing is fixed with the bearing support module by screws.

9. The modular separable transmission mechanism housing according to claim 8, characterized in that: the inner hole of the bearing support module is a square hole or a circular hole.

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