Gearbox

Abstract

The gearbox comprises a shell, a wire harness and a first fixing piece, the inner wall of the shell is provided with a convex rib, the first fixing piece is arranged on the convex rib, the first fixing piece is provided with a clamping groove, and the wire harness is connected with the first fixing piece in a clamped mode through the clamping groove and used for limiting the wire harness and reducing occupation of the inner space of the shell. The possibility of interference caused by contact between the wire harness and other parts is reduced, and the safety of the gearbox is improved.

Description

Technical Field

[0001] This application relates to the technical field of new energy vehicle drive systems, and specifically relates to a transmission. Background Art

[0002] The transmission is an important component of new energy vehicles, mainly used to reduce the speed, increase the torque, reduce energy loss, and improve the energy utilization efficiency of the entire drive system. Different components are arranged inside the transmission, and different components are connected by wire harnesses to transmit electrical signals. Due to the narrow internal space of the transmission, the wire harness is prone to interference contact with other components, posing a safety risk. Utility Model Content

[0003] In view of this, this application provides a transmission to facilitate solving the problem that the wire harness is prone to interference and has low safety in the prior art.

[0004] This application provides a transmission, which includes a housing, a wire harness, and a first fixing member;

[0005] The inner wall of the housing has convex ribs, the first fixing member is arranged on the convex ribs, the first fixing member has a card slot, and the wire harness is clamped with the first fixing member through the card slot.

[0006] In a possible implementation manner, the first fixing member includes two limiting parts, the limiting parts are arranged on the convex ribs, and the card slot is formed between the two limiting parts.

[0007] In a possible implementation manner, one end of the limiting part that is not connected to the convex rib has a guiding part, and the guiding part is arc-shaped.

[0008] In a possible implementation manner, the card slot has an installation opening, the size of the installation opening is smaller than the diameter of the wire harness, and the inner wall of the card slot is an arc surface for fitting with the wire harness.

[0009] In a possible implementation manner, the transmission includes a second fixing member, the second fixing member is arranged at a position on the inner wall of the housing where no convex rib is provided, the second fixing member includes a base and a hoop, the hoop is installed on the base, and the wire harness passes through the hoop.

[0010] In a possible implementation manner, the hoop is in a ring-shaped strip form.

[0011] In a possible implementation manner, the base includes an installation hole, and the hoop passes through the installation hole.

[0012] In a possible implementation, the gearbox includes a resolver and a connector. The resolver is installed inside the housing, and the connector is installed outside the housing. The resolver is connected to the connector through the wire harness.

[0013] In a possible implementation, the resolver includes a winding, and the second fixing member is located at one end of the wire harness close to the winding.

[0014] In a possible implementation, the gearbox includes at least two of the second fixing members, and the second fixing members and the first fixing members are arranged at intervals.

[0015] An embodiment of the present application provides a gearbox, which includes a housing, a wire harness, and a first fixing member. The inner wall of the housing has a rib, and the first fixing member is arranged on the rib. The first fixing member has a card slot, and the wire harness is clamped to the first fixing member through the card slot to limit the wire harness, reduce the possibility of interference between the wire harness and other components, and improve the safety of the gearbox. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 Schematic diagram of the internal structure of a gearbox provided by an embodiment of the present application;

[0018] Figure 2 Schematic diagram of the installation structure of a resolver provided by an embodiment of the present application;

[0019] Figure 3 Cross-sectional view of a first fixing member provided by an embodiment of the present application;

[0020] Figure 4 For Figure 1 Cross-sectional view taken along A-A in ;

[0021] Figure 5 For Figure 4 Partial enlarged view of I in.

[0022] Description of the reference numerals:

[0023] 1 - Housing;

[0024] 11 - Rib;

[0025] 2 - Wire harness;

[0026] 3 - First fixing member;

[0027] 31 - Card slot;

[0028] 311 - Installation opening;

[0029] 32 - Limiting portion;

[0030] 321 - Guide portion;

[0031] 4 - Second fixing member;

[0032] 41 - Base;

[0033] 411 - Installation hole;

[0034] 42 - Hoop;

[0035] 5 - Resolver;

[0036] 51 - Winding;

[0037] 6 - Connector;

[0038] 7 - Motor. Detailed implementation manners

[0039] In order to better understand the technical solutions of the present application, the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0040] It should be clear that the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0041] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms of "a", "the" and "said" used in the embodiments of the present application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0042] It should be understood that the term " / and / " used herein is only a description of the associated relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0043] Such as Figure 1 And Figure 2As shown in the figure, the present application provides a transmission, which is an important component in a vehicle. The transmission includes a housing 1, which is used to support and protect the parts inside the transmission. Inside the housing 1, there is a wire harness 2 provided for electrical connection of various components or for connection between internal components and external parts. The housing 1 is a component with a relatively large weight in the entire electric drive system. Under the condition of meeting the strength, the housing 1 should be as light as possible. Therefore, the wall thickness of the housing 1 needs to balance strength and mass. In order to improve the strength of the housing 1 of the existing transmission, rib 11 is usually provided on the housing 1 as a reinforcing rib to improve the structural strength of the housing 1. However, the rib 11 protrudes relative to the inner wall surface of the housing 1, so it will occupy the internal space of the housing 1. When the wire harness 2 is arranged in the existing transmission, the rib 11 will block the wire harness 2, and the wire harness 2 must be arranged across the rib 11, making the wire harness 2 easy to contact other components inside the transmission, resulting in safety problems in the drive system.

[0044] As Figure 3 shown in the figure, the transmission provided by the embodiment of the present application includes a first fixing member 3. The first fixing member 3 is arranged on the rib 11, and the first fixing member 3 has a card slot 31. The wire harness 2 is limited to the first fixing member 3 by being clamped with the card slot 31, thereby reducing the possibility of the wire harness 2 displacing and contacting other components inside the transmission, and improving the safety of the transmission. The position where the first fixing member 3 is arranged on the rib 11 can better fix the wire harness 2 and prevent the wire harness 2 from loosening or displacing after being lifted by the rib 11. Further, the first fixing member 3 can be integrally arranged with the rib 11, and a part of the bottom structure of the first fixing member 3 can be shared with the rib 11, so as to reduce the volume of the first fixing member 3 and the occupation of the internal space of the housing 1, which is beneficial to the arrangement and layout of the components inside the housing 1. The card slot 31 is used to clamp with the wire harness 2 and can limit and fix the wire harness 2. The first fixing member 3 can be arranged at the positions of different ribs 11 on the path of the wire harness 2 to fix the wire harness 2 from different positions, improve the installation stability of the wire harness 2, and reduce the possibility of the wire harness 2 detaching from the first fixing member 3. And the whole wire harness 2 can be attached to the inner wall of the housing 1, reducing the possibility of the wire harness 2 contacting other components and improving the safety of the transmission.

[0045] The shape of the card slot 31 can be set according to the cross-sectional shape of the wire harness 2. For example, usually the cross-section of the wire harness 2 is circular or oval, or the wire harness 2 is composed of a bundle of multiple independent wires. The inner wall of the card slot 31 can also be correspondingly set as an arc surface to fit the outer surface of the wire harness 2. The diameter of the inner wall of the card slot 31 should be equivalent to the diameter of the wire harness 2, so that the wire harness 2 can be stably installed inside the card slot 31, reducing the possibility of the wire harness 2 shaking relative to the first fixing member 3, and the card slot 31 will not overly compress the wire harness 2 and cause it to malfunction.

[0046] As Figure 3 shown, in a possible implementation, the first fixing member 3 includes two limiting portions 32 which are disposed on the rib 11, and a clamping groove 31 is formed between the two limiting portions 32.

[0047] The two limiting portions 32 are spaced apart. The limiting portions 32 are used for clamping the wire harness 2 and are snap-connected to the wire harness 2. The shape of the through hole for setting the limiting portion 32 can set the size and shape of the clamping groove 31. The two limiting portions 32 can be inclined in a direction close to each other, so that the inner wall of the clamping groove 31 can better fit the wire harness 2. The outer wall of the end of the limiting portion 32 connected to the rib 11 can be set as an arc surface, so that the transition between the limiting portion 32 and the rib 11 is smoother. When multiple wire harnesses 2 or other components are arranged inside the gearbox, other components or wire harnesses 2 will not be stuck by the limiting portion 32. The limiting portion 32 has a certain elasticity. When the wire harness 2 is installed, the limiting portion 32 can deform to facilitate the snap connection between the wire harness 2 and the clamping groove 31.

[0048] As Figure 3 shown, in a possible implementation, the end of the limiting portion 32 not connected to the rib 11 has a guiding portion 321, and the guiding portion 321 is arc-shaped.

[0049] When the wire harness 2 is snap-connected to the clamping groove 31, the wire harness 2 needs to extend into the inside of the clamping groove 31 between the two limiting portions 32 to achieve the snap connection. The guiding portion 321 can contact the clamping groove 31 during the process of the wire harness 2 extending into the inside of the clamping groove 31. Since the guiding portion 321 is arc-shaped, it is convenient for the wire harness 2 to slide along the guiding portion 321 and smoothly enter the inside of the clamping groove 31. The guiding portion 321 can also be set as an inclined surface or other curved surface shapes, as long as the guiding portion 321 can play a guiding function during the installation of the wire harness 2. The shape of the guiding portion 321 is not specifically limited herein.

[0050] As Figure 3 shown, in a possible implementation, the clamping groove 31 has an installation opening 311, the size of the installation opening 311 is smaller than the diameter of the wire harness 2, and the inner wall of the clamping groove 31 is an arc surface for fitting with the wire harness 2.

[0051] The installation opening 311 facilitates the clamping connection between the wire harness 2 and the first fixing member 3. The wire harness 2 can enter the card slot 31 through the installation opening 311. The size of the installation opening 311 should be adapted to the size of the wire harness 2. Specifically, the width dimension of the installation opening 311 should be slightly smaller than the maximum cross-sectional width of the wire harness 2. Generally, the wire harness 2 has a certain elasticity and allows a certain deformation. Therefore, when the wire harness 2 abuts against the limiting portion 32 during the installation process, the wire harness 2 can deform to a certain extent and enter into the card slot 31. When the wire harness 2 is installed in the card slot 31, the wire harness 2 can restore its own deformation. Since the size of the installation opening 311 is slightly smaller than the cross-sectional width dimension of the wire harness 2, when the wire harness 2 is installed in the card slot 31, it is not easy for the wire harness 2 to be separated from the first fixing member 3 under external force, which improves the stability of the installation and fixation of the wire harness 2.

[0052] As Figure 4 shown, in a possible implementation manner, the transmission includes a second fixing member 4. The second fixing member 4 is arranged at a position on the inner wall of the housing 1 where there are no ribs 11. The second fixing member 4 includes a base 41 and a hoop 42. The hoop 42 is installed on the base 41, and the wire harness 2 passes through the hoop 42.

[0053] When the wire harness 2 is arranged in the housing 1, since it needs to cross over the ribs 11, the wire harness 2 is pushed up by the ribs 11 and is in a position relatively far from the inner wall of the housing 1. The second fixing member 4 is arranged at a position without ribs 11, so the position of the second fixing member 4 is more closely attached to the inner wall of the housing 1 relative to the first fixing member 3. The second fixing member 4 is provided with a base 41. The base 41 is used to support and connect the hoop 42. The base 41 can raise the position of the hoop 42 so that the position of the hoop 42 can match the wire harness 2, thereby preventing the hoop 42 from being too close to the inner wall of the housing 1, which may cause the hoop 42 to pull the wire harness 2 when fixing the wire harness 2. The height dimension of the base 41 can be set according to the overall height of the ribs 11 and the first fixing member 3, so that the part of the wire harness 2 connected to the first fixing member 3 and the part of the wire harness 2 connected to the second connecting member can maintain a relatively consistent height.

[0054] The hoop 42 can be made by bending a strip-shaped or wire-shaped material with elasticity. For example, the two ends of the hoop 42 are connected to each other to form a ring shape, and the tightness of the fixation can be adjusted by adjusting the size of the hoop 42 to adapt to wire harnesses 2 of different sizes.

[0055] As Figure 5 shown, in a possible implementation manner, the hoop 42 is in an annular strip shape.

[0056] The clamp 42 can be made of a flat strip material, and the two ends of the strip material are connected to each other to form a ring. Setting the clamp 42 in a ring-shaped strip form enables it to have a relatively large width, which can increase the contact area between the clamp 42 and the wire harness 2, thereby reducing the pressure of the clamp 42 on the wire harness 2 and improving the stability of fixing the wire harness 2 by the clamp 42.

[0057] As Figure 5 shown, in a possible implementation, the base 41 includes a mounting hole 411, and the clamp 42 passes through the mounting hole 411.

[0058] Setting the mounting hole 411 facilitates the installation of the clamp 42. The clamp 42 can be made of an elastic material. When setting the clamp 42, the clamp 42 can be first passed through the mounting hole 411, and then the two ends of the clamp 42 are connected to each other to form a ring. Further, the wire harness 2 is passed through the clamp 42 to fix the wire harness 2. Or directly when the clamp 42 passes through the mounting hole 411 and is connected, the clamp 42 is wound around the wire harness 2 for fixing. The clamp 42 can adjust the size of the aperture after forming a ring through the connection position at both ends. For example, when the two ends of the clamp 42 are connected, the clamp 42 can form a ring with the largest aperture. When one end of the clamp 42 is connected to a position relative to the middle of the clamp 42, a ring with a relatively smaller aperture will be formed. The clamp 42 can be flexibly set according to actual needs. The two ends of the clamp 42 can be connected by other connectors or connected to each other by means such as bonding, as long as the clamp 42 can be connected and form a ring, and no specific restrictions are made here.

[0059] As Figure 1 and Figure 2 shown, in a possible implementation, the transmission includes a resolver 5 and a plug-in connector 6. The resolver 5 is installed inside the housing 1, and the plug-in connector 6 is installed outside the housing 1. The resolver 5 is connected to the plug-in connector 6 through the wire harness 2.

[0060] The resolver 5 is a device used to monitor the rotor position and speed of the motor 7. The resolver 5 sends the monitored information to the motor 7 controller to achieve more precise control of the motor 7. The connector 6 is used to connect the gearbox to other devices. Inside the housing 1, the resolver 5 is connected to the connector 6 through the wire harness 2. The gearbox includes two resolvers 5. One is the resolver 5 of the power motor, which is located relatively far from the connector 6, and the other is the resolver 5 of the generator, which is located relatively close to the connector 6. The resolver 5 that is relatively far from the connector 6 needs to be provided with a longer wire harness 2 to be connected to the connector 6. In the embodiment of the present application, the first fixing member 3 and the second fixing member 4 are provided to fix and limit the wire harness 2, thereby reducing the possibility of the wire harness 2 displacing inside the housing 1, reducing the risk of interference between the wire harness 2 and other structures, and improving the safety of the transformer.

[0061] As Figure 4 shown, in a possible implementation, the resolver 5 includes a winding 51, and the second fixing member 4 is located at one end of the wire harness 2 close to the winding 51.

[0062] In the drive system of a new energy vehicle, a resolver 5 is provided, which can detect the speed of the motor 7, so that the DC electrical energy provided by the battery pack can be converted into AC electrical energy suitable for use by the motor through the resolver 5, thereby driving the motor to achieve the power output of the vehicle. In order to reduce the axial dimension of the gearbox, the resolver 5 is arranged on the motor shaft, and the stator in the motor 7 covers the resolver 5. The wire harness 2 of the resolver 5 needs to pass through the stator of the motor 7 and be connected to the motor controller to transmit the identified speed information to the motor controller. There are multiple windings 51 on the motor stator, and the windings 51 are connected to the power supply to form an electromagnetic field in the stator. Therefore, there is a high-voltage current on the windings 51, and it is necessary to avoid direct contact between the wire harness 2 and the windings 51. The windings 51 protrude towards the housing 1, and the distance between the windings 51 and the wire harness 2 is relatively close. In the embodiment of the present application, the second fixing member 4 is arranged at one end of the wire harness 2 close to the rotor, which is used to fix the position of the wire harness 2 more accurately, reduce the possibility of the wire harness 2 contacting the windings 51, and improve the safety of the transformer.

[0063] As Figure 2 shown, in a possible implementation, the gearbox includes at least two second fixing members 4, and the second fixing members 4 and the first fixing member 3 are arranged at intervals.

[0064] In the embodiment of the present application, a plurality of first fixing members 3 and a plurality of second fixing members 4 are provided to fix the wire harness 2 from different positions, thereby reducing the possibility of interference contact between the wire harness 2 and other structures, and improving the safety of the gearbox. The positions of the first fixing member 3 and the second fixing member 4 can be reasonably set according to the position of the rib 11, and the numbers of the first fixing member 3 and the fourth fixing member 4 can be set according to actual needs, and no specific limitation is made here.

[0065] The embodiment of the present application provides a gearbox, which includes a housing 1, a wire harness 2 and a first fixing member 3. The inner wall of the housing 1 has a rib 11. The first fixing member 3 is disposed on the rib 11. The first fixing member 3 has a card slot 31, and the wire harness 2 is clamped with the first fixing member 3 through the card slot 31, so as to limit the wire harness 2, reduce the occupation of the internal space of the housing 1, reduce the possibility of interference caused by contact between the wire harness 2 and other components, and improve the safety of the gearbox.

[0066] The structure, features and effects of the present application have been described in detail based on the embodiments shown in the drawings. The above is only the preferred embodiment of the present application, but the present application is not limited to the scope shown in the drawings. Any changes made according to the concept of the present application, or equivalent embodiments modified into equivalent changes, still within the spirit covered by the specification and the drawings, shall be within the protection scope of the present application.

Claims

1. A gearbox, characterized in that: The gearbox includes a housing, a wiring harness and a first fixing member; The inner wall of the housing has a convex rib, the first fixing member is arranged on the convex rib, the first fixing member has a clamping groove, and the wiring harness is clamped with the first fixing member through the clamping groove.

2. The gearbox according to claim 1, characterized in that: The first fixing member includes two limiting parts, the limiting parts are arranged on the convex rib, and the clamping groove is formed between the two limiting parts.

3. The gearbox according to claim 2, characterized in that: The end of the limiting portion that is not connected to the convex rib has a guiding portion, and the guiding portion is arc-shaped.

4. The gearbox according to claim 1, characterized in that: The card slot has an installation opening, the size of which is smaller than the diameter of the wire harness, and the inner wall of the card slot is a curved surface for fitting with the wire harness.

5. The gearbox according to any one of claims 1 to 4, characterized in that: The gearbox includes a second fixing member, which is arranged at a position on the inner wall of the shell where the rib is not arranged, and the second fixing member includes a base and a clamp, the clamp is installed on the base, and the wiring harness passes through the clamp.

6. The gearbox according to claim 5, characterized in that: The clamp is in the form of an annular belt.

7. The gearbox according to claim 5, characterized in that: The base comprises a mounting hole, and the clamp passes through the mounting hole.

8. The gearbox according to claim 5, characterized in that: The gearbox comprises a rotary transformer and a connector. The rotary transformer is installed inside the housing, and the connector is installed outside the housing. The rotary transformer is connected to the connector via the wiring harness.

9. The gearbox according to claim 8, characterized in that: The rotary transformer includes a winding, and the second fixing member is located at an end of the wiring harness close to the winding.

10. The gearbox according to claim 5, characterized in that: The gearbox includes at least two second fixing members, and the second fixing members are spaced apart from the first fixing members.

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