Intermediate axle assembly and vehicle

Abstract

The utility model provides an intermediate axle assembly and a vehicle, and the intermediate axle assembly comprises an axle housing; the transmission assembly is connected with the axle housing, the transmission assembly comprises a driving bevel gear, a driving cylindrical gear and a synchronizer, and the driving bevel gear is connected with the driving cylindrical gear through the synchronizer; the electric actuating mechanism is connected with the axle housing, the electric actuating mechanism is provided with a motor and a shifting fork, and the motor drives the shifting fork to drive the synchronizer to move in the axis direction of the driving bevel gear, so that the driving cylindrical gear and the driving bevel gear are connected and disconnected. According to the scheme, the motor drives the shifting fork to drive the synchronizer to move, compared with air cylinder driving, the response of the motor is rapid, no air channel waiting time exists, and the gear shifting clamping stagnation phenomenon is avoided.

Description

Technical Field

[0001] The utility model relates to the field of vehicles, and in particular to a mid-bridge assembly and a vehicle. Background Art

[0002] At present, the shift actuator of the mid-axle assembly includes a cylinder, a shift fork and a shift fork shaft. The cylinder drives the shift fork shaft to extend and retract to drive the shift fork to move left and right. The pneumatic drive mode has a slow shift response. When shifting frequently, it is easy to switch to another mode before one mode is switched, causing the switch to be stuck, which is not conducive to driving safety.

[0003] With respect to the above-mentioned technical problem of slow gear shift response, no effective solution has been proposed yet. Utility Model Content

[0004] The main purpose of the utility model is to provide a mid-bridge assembly and a vehicle to solve the technical problem of slow shift response of a shift actuator.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a central axle assembly is provided, including: a bridge housing; a transmission component, the transmission component is connected to the bridge housing, the transmission component includes a driving bevel gear, a driving cylindrical gear and a synchronizer, the driving bevel gear is connected to the driving cylindrical gear through the synchronizer; an electric actuator, the electric actuator is connected to the bridge housing, the electric actuator has a motor and a shift fork, the motor drives the shift fork to drive the synchronizer to move along the axial direction of the driving bevel gear, so that the driving cylindrical gear and the driving bevel gear are engaged and disconnected.

[0006] Furthermore, the intermediate bridge assembly also includes: a displacement sensor, which is connected to the motor signal, and the displacement sensor is used to collect the position signal of the shift fork, and the motor drives the shift fork to move according to the position signal.

[0007] Furthermore, the displacement sensor is connected to the motor, and the displacement sensor is arranged opposite to the shift fork along the moving direction of the shift fork.

[0008] Furthermore, the electric actuator also includes: a fork shaft, which is movably arranged relative to the bridge housing, the fork shaft is connected to the fork, and at least part of the fork shaft is provided with transmission teeth; a driving gear, the driving gear is connected to the driving shaft of the motor, the driving gear is meshed with the transmission teeth to drive the fork shaft to move along the axial direction of the active bevel gear.

[0009] Furthermore, the transmission assembly and the electric actuator are both connected to the bridge housing through a support seat, and a receiving cavity is formed between the support seat and the bridge housing. The transmission assembly and the fork shaft are both located in the receiving cavity, and the fork shaft is slidably connected to the support seat.

[0010] Furthermore, the driving bevel gear has a gear shaft, the driving cylindrical gear is sleeved on the outer wall of the gear shaft, and the driving cylindrical gear is rotatably arranged relative to the gear shaft.

[0011] Furthermore, the synchronizer includes: a gear seat, which is sleeved on the outer wall of the gear shaft; a movable gear sleeve, which is sleeved on the outer wall of the gear seat, and the movable gear sleeve is slidably arranged relative to the gear seat along the axial direction of the active bevel gear; an engaging gear sleeve is provided at one end of the active cylindrical gear close to the synchronizer, and the shift fork moves along the axial direction of the active bevel gear to engage and disconnect the movable gear sleeve with the engaging gear sleeve.

[0012] Furthermore, the middle axle assembly also includes: a differential, which is located in the axle housing and meshes with the active bevel gear; and a front wheel hub mechanism, which is located at both ends of the axle housing and meshes with the differential.

[0013] Furthermore, the displacement sensor is a photoelectric sensor or an optical fiber sensor.

[0014] According to another aspect of the utility model, a vehicle is provided. The vehicle includes a middle bridge assembly, and the middle bridge assembly is the middle bridge assembly mentioned above.

[0015] The technical solution of the utility model is applied, and the middle axle assembly includes an axle housing, a transmission assembly and an electric actuator. The electric actuator drives the synchronizer to move through the motor-driven fork to achieve the engagement and disconnection of the active cylindrical gear and the active bevel gear. In the above solution, compared with the cylinder drive, the motor responds quickly, there is no waiting time for the air path, and the gear shifting jamming phenomenon is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 A schematic structural diagram of an embodiment of a middle axle assembly according to the utility model is shown;

[0018] Figure 2 The schematic diagram of the structure of the shift fork shaft in the utility model is shown;

[0019] Figure 3 The schematic diagram shows the positional relationship between the motor and the displacement sensor in the utility model.

[0020] The above drawings include the following reference numerals:

[0021] 1. Bridge housing;

[0022] 2. Driving bevel gear;

[0023] 3. Driving cylindrical gear;

[0024] 31. Engagement gear sleeve;

[0025] 4. Synchronizer;

[0026] 41. Gear seat; 42. Moving gear sleeve;

[0027] 5. Displacement sensor;

[0028] 6. Electric actuator;

[0029] 61. Motor; 62. Shift fork shaft; 621. Transmission tooth; 63. Shift fork; 64. Drive gear;

[0030] 7. First bearing;

[0031] 8. Second bearing;

[0032] 9. Differential;

[0033] 10. Support seat;

[0034] 110. Driven cylindrical gear. DETAILED DESCRIPTION

[0035] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0036] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0037] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0038] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of the layers and regions may be enlarged, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0039] Combination Figures 1 to 3 As shown, according to a specific embodiment of the present application, a mid-bridge assembly is provided.

[0040] Specifically, the middle axle assembly includes an axle housing 1, a transmission assembly and an electric actuator 6. The transmission assembly is connected to the axle housing 1, and the transmission assembly includes a driving bevel gear 2, a driving cylindrical gear 3 and a synchronizer 4, and the driving bevel gear 2 is connected to the driving cylindrical gear 3 through the synchronizer 4; the electric actuator 6, the electric actuator 6 is connected to the axle housing 1, and the electric actuator 6 has a motor 61 and a shift fork 63, and the motor 61 drives the shift fork 63 to drive the synchronizer 4 to move along the axial direction of the driving bevel gear 2, so that the driving cylindrical gear 3 and the driving bevel gear 2 are engaged and disconnected.

[0041] In the embodiment of the present application, the middle axle assembly includes an axle housing 1, a transmission assembly and an electric actuator 6. The electric actuator 6 drives the fork 63 through the motor 61 to drive the synchronizer 4 to move, so as to achieve the engagement and disconnection of the active cylindrical gear 3 and the active bevel gear 2. In the above scheme, compared with the cylinder drive, the motor 61 responds quickly, there is no air path waiting time, and the gear shifting jamming phenomenon is avoided.

[0042] In an exemplary embodiment of the present application, the intermediate axle assembly further includes a displacement sensor 5, which is connected to the motor 61 by signal. The displacement sensor 5 is used to collect the position signal of the shift fork 63, and the motor 61 drives the shift fork 63 to move according to the position signal. In the embodiment of the present application, the displacement sensor 5 collects the position signal of the shift fork 63 to know whether the shifting action of the whole vehicle is completed, so as to avoid the shift fork 63 from continuing to move after the shifting is completed, thereby causing wear of the shift fork 63 and the moving gear sleeve 42.

[0043] Specifically, a controller is integrated on the motor 61, and the controller is used to control the direction and start and stop of the motor 61. The displacement sensor 5 is connected to the controller signal. The controller controls the direction and start and stop of the motor 61 according to the position signal of the fork 63 to achieve timely response of the motor 61.

[0044] The displacement sensor 5 may be connected to the electric actuator 6 , or may be connected to the bridge housing 1 or the support seat 10 , as long as the position signal of the shift fork 63 can be collected.

[0045] Preferably, the displacement sensor 5 is connected to the motor 61, and the displacement sensor 5 is arranged relative to the fork 63 along the moving direction of the fork 63. The displacement sensor 5 is located at the end of the electric actuator 6 away from the bridge housing 1, that is, the displacement sensor 5 is located outside the support seat 10, and the displacement sensor 5 does not occupy the space of other components in the support seat 10. Among them, the displacement sensor 5 is arranged relative to the fork 63 along the moving direction of the fork 63, that is, the displacement sensor 5 can collect the linear displacement of the fork 63 without angle conversion, and the obtained position signal is more accurate.

[0046] In an exemplary embodiment of the present application, the electric actuator 6 further includes a fork shaft 62 and a driving gear 64. The fork shaft 62 is movably arranged relative to the bridge housing 1, the fork shaft 62 is connected to the fork 63, at least part of the fork shaft 62 is provided with a transmission tooth 621, the driving gear 64 is connected to the driving shaft of the motor 61, and the driving gear 64 is meshed with the transmission tooth 621 to drive the fork shaft 62 to move along the axial direction of the active bevel gear 2.

[0047] Furthermore, the transmission assembly and the electric actuator 6 are both connected to the bridge housing 1 through the support seat 10, and a receiving cavity is formed between the support seat 10 and the bridge housing 1. The transmission assembly and the fork shaft 62 are both located in the receiving cavity, and the fork shaft 62 is slidably connected to the support seat 10. Specifically, the support seat 10 is provided with a guide hole, the center line of the guide hole is parallel to the axis of the active bevel gear 2, and the fork shaft 62 is slidably connected to the guide hole. Among them, the two ends of the gear shaft of the active bevel gear 2 are rotatably connected to the support seat 10 through the first bearing 7 respectively, and the first bearing 7 is generally a tapered roller bearing.

[0048] Furthermore, the driving bevel gear 2 has a gear shaft, and the driving cylindrical gear 3 is sleeved on the outer wall of the gear shaft, and the driving cylindrical gear 3 is rotatably arranged relative to the gear shaft. Specifically, the driving cylindrical gear 3 is rotatably connected to the gear shaft through the second bearing 8, wherein the second bearing 8 is a needle bearing.

[0049] Further, the synchronizer 4 includes a gear seat 41 and a movable gear sleeve 42, the gear seat 41 is sleeved on the outer wall of the gear shaft, that is, the gear seat 41 is stationary relative to the gear shaft, and the movable gear sleeve 42 is sleeved on the outer wall of the gear seat 41, and the movable gear sleeve 42 is slidably arranged relative to the gear seat 41 along the axial direction of the active bevel gear 2, and an engaging gear sleeve 31 is provided at one end of the active cylindrical gear 3 close to the synchronizer 4, and the shift fork 63 moves along the axial direction of the active bevel gear 2 to shift the movable gear sleeve 42 to engage and disconnect with the engaging gear sleeve 31, that is, to achieve the engagement and disconnection of the active bevel gear 2 and the active cylindrical gear 3.

[0050] The moving gear sleeve 42 is connected to the engaging gear sleeve 31 via a synchronizing ring.

[0051] Furthermore, the middle axle assembly further includes a differential 9 and a front wheel hub mechanism, wherein the differential 9 is located in the axle housing 1 and meshes with the driving bevel gear 2, and the front wheel hub mechanism is located at both ends of the axle housing 1 and meshes with the differential 9. That is, part of the power of the driving bevel gear 2 is transmitted to the front wheel hub mechanism through the differential 9.

[0052] Furthermore, the middle axle assembly further includes a transmission shaft and a driven cylindrical gear 110. The transmission shaft is used to connect to the rear axle assembly. The driven cylindrical gear 110 is coaxially connected to the transmission shaft, and the driven cylindrical gear 110 is meshed with the driving cylindrical gear 3. That is, part of the power of the driving bevel gear 2 is transmitted to the rear axle via the driving cylindrical gear 3.

[0053] In the above embodiments, the displacement sensor 5 is a photoelectric sensor or an optical fiber sensor.

[0054] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0055] 1. The motor 61 drives the shift fork 63 to drive the synchronizer 4 to move, so as to achieve the engagement and disconnection of the active cylindrical gear 3 and the active bevel gear 2. Compared with the cylinder drive, the motor 61 responds quickly, without air path waiting time, and avoids the shifting jam phenomenon.

[0056] 2. The displacement sensor 5 acquires the position signal of the shift fork 63 to know whether the gear shifting action of the whole vehicle is completed, so as to avoid the shift fork 63 continuing to move after the gear shifting is completed, thereby causing wear of the shift fork 63 and the moving gear sleeve 42.

[0057] According to another specific embodiment of the present utility model, a vehicle is provided. The vehicle includes a middle bridge assembly, and the middle bridge assembly is the middle bridge assembly in the above embodiment.

[0058] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0059] In addition to the above, it should be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of the present utility model.

[0060] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0061] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A mid-bridge assembly, characterized in that: include: Axle housing (1); A transmission assembly, the transmission assembly is connected to the bridge housing (1), the transmission assembly comprises a driving bevel gear (2), a driving cylindrical gear (3) and a synchronizer (4), the driving bevel gear (2) is connected to the driving cylindrical gear (3) via the synchronizer (4); An electric actuator (6) is connected to the bridge housing (1), and comprises a motor (61) and a shift fork (63). The motor (61) drives the shift fork (63) to drive the synchronizer (4) to move along the axial direction of the active bevel gear (2), so that the active cylindrical gear (3) and the active bevel gear (2) are engaged and disconnected.

2. The middle bridge assembly according to claim 1, characterized in that: The intermediate bridge assembly also includes: A displacement sensor (5), the displacement sensor (5) being connected to the motor (61) signal, the displacement sensor (5) being used to collect a position signal of the shift fork (63), and the motor (61) driving the shift fork (63) to move according to the position signal.

3. The middle bridge assembly according to claim 2, characterized in that: The displacement sensor (5) is connected to the motor (61), and the displacement sensor (5) is arranged opposite to the shift fork (63) along the moving direction of the shift fork (63).

4. The middle axle assembly according to claim 1 or 2, characterized in that: The electric actuator (6) further comprises: a shift fork shaft (62), the shift fork shaft (62) being movably arranged relative to the bridge housing (1), the shift fork shaft (62) being connected to the shift fork (63), and at least a portion of the shift fork shaft (62) being provided with a transmission tooth (621); A driving gear (64), the driving gear (64) being connected to the driving shaft of the motor (61), the driving gear (64) being meshed with the transmission tooth (621) to drive the shift fork shaft (62) to move along the axial direction of the active bevel gear (2).

5. The middle bridge assembly according to claim 4, characterized in that: The transmission assembly and the electric actuator (6) are both connected to the bridge housing (1) via a support seat (10); an accommodating cavity is formed between the support seat (10) and the bridge housing (1); the transmission assembly and the fork shaft (62) are both located in the accommodating cavity; and the fork shaft (62) is slidably connected to the support seat (10).

6. The middle axle assembly according to claim 1, characterized in that: The driving bevel gear (2) has a gear shaft, the driving cylindrical gear (3) is sleeved on the outer wall of the gear shaft, and the driving cylindrical gear (3) is rotatably arranged relative to the gear shaft.

7. The middle axle assembly according to claim 6, characterized in that: The synchronizer (4) comprises: A gear seat (41), wherein the gear seat (41) is sleeved on the outer wall of the gear shaft; A movable gear sleeve (42), wherein the movable gear sleeve (42) is sleeved on the outer wall of the gear seat (41), and the movable gear sleeve (42) is slidably arranged relative to the gear seat (41) along the axial direction of the active bevel gear (2); An engaging tooth sleeve (31) is provided at one end of the driving cylindrical gear (3) close to the synchronizer (4), and the shift fork moves along the axial direction of the driving bevel gear (2) to shift the moving tooth sleeve (42) to engage with and disengage from the engaging tooth sleeve (31).

8. The middle bridge assembly according to claim 1, characterized in that: The intermediate bridge assembly also includes: A differential (9), the differential (9) being located in the bridge housing (1), and the differential (9) being meshed with the driving bevel gear (2); A front wheel hub mechanism is located at two ends of the bridge housing (1), and the front wheel hub mechanism is meshed with the differential (9).

9. The middle bridge assembly according to claim 2, characterized in that: The displacement sensor (5) is a photoelectric sensor or an optical fiber sensor.

10. A vehicle, comprising a mid-bridge assembly, characterized in that: The center axle assembly is the center axle assembly according to any one of claims 1-9.

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