Rotating speed measuring device, axle assembly and vehicle

Abstract

The invention relates to the technical field of vehicles, and particularly discloses a rotating speed measuring device, an axle assembly and a vehicle, the rotating speed measuring device comprises a shell, an input piece, an intermediate gear, an output piece, a support assembly and a sensor, the shell is provided with an adjusting piece, the input piece is used for being connected with a to-be-measured shaft, and the intermediate gear is meshed with the input piece; the output part is used for being meshed with the intermediate gear and rotationally connected to the shell, the support assembly comprises at least two supports, the input part and the output part are rotationally connected to the two supports respectively, and the intermediate gear is rotationally connected with the two supports at the same time. An angle is formed between the center connecting line of the intermediate gear and the input part and the center connecting line of the intermediate gear and the output part, and the adjusting part is used for increasing the included angle between the center connecting line of the intermediate gear and the input part and the center connecting line of the intermediate gear and the output part, so that the intermediate gear is more tightly attached to the input part and the output part, and gear backlash is eliminated; signal interruption is avoided, and speed taking precision is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and particularly relates to a rotational speed measuring device, an axle assembly, and a vehicle. Background Art

[0002] Currently, the measurement of the rotational speed of a vehicle half shaft is usually obtained from the rotational speed measured by the wheel side ABS or calculated from the output rotational speed of the engine. However, under special working conditions, such as slipping or locking, the rotational speed measured by the above measurement method has a large deviation from the actual rotational speed of the half shaft, which is not conducive to the refined control of the vehicle.

[0003] In response to this, a speed measuring device is provided in the prior art. This device is directly connected to the half shaft to directly measure the actual rotational speed of the half shaft. However, it is found in the use process that during the process of switching between forward and reverse gears and different forward gears, due to the existence of tooth side clearance, the signal is frequently interrupted when using this speed measuring device for speed measurement, seriously affecting the speed acquisition accuracy. Summary of the Invention

[0004] The purpose of the present invention is to provide a rotational speed measuring device, an axle assembly, and a vehicle to solve the problem of frequent signal interruption during the measurement process of existing speed measuring devices.

[0005] The present invention provides a rotational speed measuring device, including:

[0006] A housing provided with an adjusting member;

[0007] An input member for connecting to the shaft to be measured;

[0008] An intermediate gear meshing with the input member;

[0009] An output member for meshing with the intermediate gear, and the output member is rotatably connected to the housing;

[0010] A bracket assembly including at least two brackets. The input member and the output member are respectively rotatably connected to the two brackets. The intermediate gear is simultaneously rotatably connected to the two brackets. The line connecting the centers of the intermediate gear and the input member and the line connecting the centers of the intermediate gear and the output member are arranged at an angle. The adjusting member is used to increase the angle between the line connecting the centers of the intermediate gear and the input member and the line connecting the centers of the intermediate gear and the output member;

[0011] A sensor for measuring the rotational speed of the output member.

[0012] As a preferred technical solution of the rotational speed measuring device, the bracket assembly includes a first bracket and a second bracket. The output member is rotatably connected to the first bracket, and the input member is rotatably connected to the second bracket. The first bracket is provided with a first connecting portion, and the second bracket is provided with a second connecting portion. The intermediate gear is rotatably connected to both the first connecting portion and the second connecting portion. The adjusting member is used to rotate the first bracket relative to the housing.

[0013] As a preferred technical solution of the rotational speed measuring device, the first bracket is provided with an adjusting arm, and the adjusting member abuts against the adjusting arm.

[0014] As a preferred technical solution of the rotational speed measuring device, the extending direction of the adjusting arm is perpendicular to the direction of the line connecting the centers of the intermediate gear and the input member.

[0015] As a preferred technical solution of the rotational speed measuring device, the adjusting member is an adjusting bolt, and the adjusting bolt is threadedly connected to the housing.

[0016] As a preferred technical solution of the rotational speed measuring device, the adjusting member includes an adjusting bolt and an elastic member. The adjusting bolt is threadedly connected to the housing, and both ends of the elastic member abut against the adjusting bolt and one of the brackets respectively.

[0017] A positioning member is further provided on the housing. A steel ball is provided at the lower end of the positioning member. The first bracket is provided with a positioning groove for accommodating the steel ball along its circumferential direction, and the steel ball can roll in the positioning groove.

[0018] As a preferred technical solution of the rotational speed measuring device, the output member is a gear shaft, and the sensor is a rotational speed sensor. The gear shaft can drive the input shaft of the rotational speed sensor to rotate.

[0019] The present invention provides an axle assembly, which includes an axle housing, a half shaft and the rotational speed measuring device of any of the above solutions. The housing is fixedly connected to the axle housing, and the input member is spline-connected to the half shaft.

[0020] The present invention provides a vehicle, which includes the rotational speed measuring device of any of the above solutions or the axle assembly of the above solution.

[0021] The beneficial effects of the present invention are as follows:

[0022] The present invention provides a rotational speed measuring device. By providing an adjusting member on the housing to adjust the bracket assembly, one of the brackets is rotated relative to the housing to increase the angle of the line connecting the centers of the input member, the intermediate gear and the output member. Since the axes of the input member and the output member are relatively fixed, the intermediate gear can be more closely attached to the input member and the output member, eliminating the backlash, avoiding signal interruption, and improving the speed measurement accuracy.

[0023] The present invention provides an axle assembly. By providing the rotational speed measuring device of the present invention, the speed taking accuracy of the half shaft is improved.

[0024] The present invention provides a vehicle. By providing the rotational speed measuring device or the axle assembly of the present invention, the interruption of the speed taking signal is avoided, the speed taking accuracy is improved, and it is more beneficial to control the whole vehicle. Description of the Drawings

[0025] Figure 1 It is a schematic structural view of the rotational speed measuring device in an embodiment of the present invention;

[0026] Figure 2 It is a schematic internal structural view of the rotational speed measuring device in an embodiment of the present invention;

[0027] Figure 3 It is a schematic structural view of the rotational speed measuring device with the outer shell removed in an embodiment of the present invention;

[0028] Figure 4 It is a side view of the rotational speed measuring device with the outer shell removed in an embodiment of the present invention;

[0029] Figure 5 It is a front view of the rotational speed measuring device with the outer shell removed in an embodiment of the present invention.

[0030] In the figure:

[0031] 1. Outer shell; 11. Positioning member; 111. Steel ball; 12. Adjusting member; 13. Elastic member; 2. Gear shaft; 3. First bracket; 31. Positioning groove; 32. Adjusting arm; 33. First connecting portion; 4. Intermediate gear; 5. Input member; 51. Internal spline; 6. Second bracket; 61. Second connecting portion; 7. Sensor. Detailed Embodiment

[0032] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0033] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the first feature has a lower horizontal height than the second feature.

[0034] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected" and "coupled" should be construed in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0036] In the prior art, the speed measurement device is directly connected to the measured shaft and measures the speed through a mechanical structure, thereby ensuring the authenticity of the measured speed. However, in the actual use process, the speed measurement signal of the speed measurement device in the prior art is frequently interrupted, seriously affecting the speed measurement accuracy of the measured shaft.

[0037] In view of this, the present embodiment provides a speed measurement device that can ensure the authenticity of the measured speed and avoid signal interruption at the same time.

[0038] Such as Figures 1 - 5As shown, this embodiment provides a rotational speed measuring device, which is used to measure the rotational speed of rotating components such as the half shaft or the main shaft of rotating equipment. In this embodiment, the rotational speed measuring device is preferably applied to the axle assembly of a vehicle. Specifically, it can be a driving axle or a driven axle. The rotational speed measuring device includes a housing 1, an input member 5, an intermediate gear 4, an output member, a bracket assembly, and a sensor 7. The housing 1 is provided with an adjusting member 12. The input member 5 is used to connect with the shaft to be measured. The output member is used to mesh with the intermediate gear 4. The output member is rotatably connected to the housing 1. The sensor 7 is used to measure the rotational speed of the output member. The bracket assembly includes at least two brackets. The input member 5 and the output member are respectively rotatably connected to the brackets. The intermediate gear 4 is rotatably connected to both brackets at the same time. The included angle between the line connecting the centers of the intermediate gear 4 and the input member 5 and the line connecting the centers of the intermediate gear 4 and the output member is set at an angle, that is, the axes of the input member 5, the intermediate gear 4, and the output member are not coplanar. The adjusting member 12 is used to increase the included angle between the line connecting the centers of the intermediate gear 4 and the input member 5 and the line connecting the centers of the intermediate gear 4 and the output member. The housing 1 is used to be fixedly connected to the axle housing of the axle assembly, and an opening is provided at the corresponding position of the axle housing of the axle assembly to facilitate the connection between the input member 5 and the half shaft. The rotational speed measuring device of this embodiment adjusts the bracket assembly on the housing 1, so that one of the brackets rotates relative to the housing 1 to increase the angle of the line connecting the centers of the input member 5, the intermediate gear 4, and the output member. Since the axes of the input member 5 and the output member are relatively fixed, as the angle of the line connecting the centers of the intermediate gear 4 increases, it moves towards the line connecting the centers of the input member 5 and the output member, so that the intermediate gear 4 is more closely attached to the input member 5 and the output member, eliminating the backlash and avoiding signal interruption, and improving the speed measurement accuracy.

[0039] Further, the bracket assembly includes a first bracket 3 and a second bracket 6. The first bracket 3 is provided with a through hole capable of cooperating with the output member, and the output member is rotatably connected to the first bracket 3 through the through hole of the first bracket 3. The second bracket 6 is provided with a through hole capable of cooperating with the input member 5, and the input member 5 is rotatably connected to the second bracket 6 through the through hole of the second bracket 6. A part of the input member 5 along the axial direction is provided with a toothed structure and is used for meshing with the intermediate gear 4, and another part is provided with a smooth shaft structure and is used for rotatably connecting with the through hole of the second bracket 6, and is axially limited by a clamp to prevent it from coming out. In addition, the first bracket 3 is further provided with a first connecting portion 33, and the second bracket 6 is provided with a second connecting portion 61. The intermediate gear 4 is rotatably connected to both the first connecting portion 33 and the second connecting portion 61. Specifically, the axle of the intermediate gear 4 is rotatably connected to both the first connecting portion 33 and the second connecting portion 61. The adjusting member 12 is used to rotate the first bracket 3 relative to the housing 1. The input member 5 is rotatably connected to the housing 1, that is, supported by the housing 1, and the output member is connected to the half shaft. Thus, the relative position relationship between the input member 5 and the output member cannot be changed. By rotating the first bracket 3 relative to the housing 1 through the adjusting member 12, the axle of the intermediate gear 4 moves, thereby changing the relative position relationship between the intermediate gear 4 and the input member 5 and the output member, reducing the center distance between the intermediate gear 4 and the input member 5 and the output member respectively, so as to eliminate the backlash.

[0040] Specifically, the first bracket 3 is provided with an adjusting arm 32, and the adjusting member 12 abuts against the adjusting arm 32. By providing the adjusting arm 32 for the adjusting member 12 to abut against, the first bracket 3 is rotated relative to the housing 1, reducing the volume of the first bracket 3, which is beneficial to improving the lightweight. Please refer to Figure 2 and Figure 3 As shown in

[0041] During the process of the adjusting member 12 adjusting the first bracket 3 through the adjusting arm 32, the first bracket 3 rotates around the axis of the output member. The extending direction of the adjusting arm 32 is perpendicular to the direction of the line connecting the centers of the intermediate gear 4 and the input member 5. Thus, a relatively small external force output by the adjusting member 12 to the adjusting arm 32 can achieve the adjustment. In this embodiment, the adjusting member 12 is a combination of an adjusting bolt and an elastic member 13. The adjusting bolt is threadedly connected to the housing 1. The two ends of the elastic member 13 respectively abut against the adjusting bolt and the adjusting arm 32. The elastic member 13 is preferably a helical spring. A stepped hole is provided on the adjusting arm 32 for accommodating and supporting the helical spring, and the adjusting bolt is provided with a stepped structure for abutting against the upper end of the helical spring, and the lower end of the adjusting bolt passes through the bolt spring for guiding and supporting. When adjusting the first bracket 3, screw in the adjusting bolt, and the stepped structure of the adjusting bolt compresses the helical spring. The elastic acting force of the helical spring acts on the adjusting arm 32, causing the first bracket 3 to rotate around the axis of the output member and driving the intermediate gear 4 to eliminate the backlash with the input member 5 and the output member. For Figure 2 andFigure 3 From this perspective, the rotation direction of the first bracket 3 is clockwise; for Figure 5 this perspective, the rotation direction of the first bracket 3 is counterclockwise.

[0042] In other embodiments, the adjusting member 12 can also be only set as an adjusting bolt, which is threadedly connected to the housing 1, and the lower end directly abuts against the adjusting arm 32, and the adjustment of the first bracket 3 can also be achieved.

[0043] Furthermore, a positioning member 11 is also provided on the housing 1, and a steel ball 111 is provided at the lower end of the positioning member 11. The first bracket 3 is provided with a positioning groove 31 for accommodating the steel ball 111 along its axial direction. The shape of the positioning groove 31 matches the shape of the steel ball 111, and the steel ball 111 can roll in the positioning groove 31. The axial limit of the first bracket 3 is achieved by setting the steel ball 111. At the same time, the steel ball 111 can roll in the positioning groove 31 to avoid resistance when adjusting the first bracket 3.

[0044] Optionally, the output member is a gear shaft 2. The intermediate gear 4 meshes with the part of the gear shaft 2 provided with gears. The optical axis part of the gear shaft 2 is rotationally connected to the first bracket 3. The sensor 7 is a rotational speed sensor, preferably a mechanical rotational speed sensor. The gear shaft 2 is drivingly connected to the rotational speed sensor to avoid distortion of the rotational speed signal caused by interference from the external environment. The specific structure of the rotational speed sensor and the connection method with the gear shaft 2 are prior arts in this field and will not be described in detail here.

[0045] The present invention provides an axle assembly, including an axle housing, a half shaft and the rotational speed measuring device in this embodiment. The housing 1 is fixedly connected to the axle housing. The input member 5 is provided with an internal spline 51, and the corresponding position of the half shaft is provided with an external spline. The input member 5 is spline-connected to the half shaft. During assembly, first, the input member 5 is assembled with the second bracket 6, and is placed inside the axle housing through the opening of the axle housing. Then, the half shaft is inserted and spline-connected to the input member 5. The remaining parts of the rotational speed measuring device are assembled with the second bracket 6, and at the same time, the housing 1 is fixedly connected to the axle housing. The positioning member 11 is adjusted to axially limit the first bracket 3. Finally, the adjusting member 12 is operated to make the intermediate gear 4 closely adhere to the gears of the input member 5 and the output member, eliminating the backlash, thereby improving the speed-taking accuracy of the half shaft.

[0046] The present invention provides a vehicle, including the rotational speed measuring device in this embodiment or the axle assembly in this embodiment. The vehicle in this embodiment is preferably a port vehicle, and the axle assembly can be a driving axle or a driven axle of the port vehicle. By setting the rotational speed measuring device in this embodiment or the axle assembly in this embodiment, the interruption of the speed-taking signal is avoided, the speed-taking accuracy is improved, and it is more beneficial to control the whole vehicle.

[0047] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A rotational speed measuring device, characterized in that, Comprising: A housing (1) provided with an adjusting member (12); An input member (5) for connecting with a shaft to be measured; An intermediate gear (4) meshing with the input member (5); An output member meshing with the intermediate gear (4), the output member being rotatably connected to the housing (1); A bracket assembly including at least two brackets, the input member (5) and the output member being respectively rotatably connected to two of the brackets, the intermediate gear (4) being simultaneously rotatably connected to the two brackets, an included angle being provided between a center line connecting the intermediate gear (4) and the input member (5) and a center line connecting the intermediate gear (4) and the output member, the adjusting member (12) being used for increasing the included angle between the center line connecting the intermediate gear (4) and the input member (5) and the center line connecting the intermediate gear (4) and the output member; A sensor (7) for measuring the rotational speed of the output member.

2. The rotational speed measuring device according to claim 1, wherein The bracket assembly includes a first bracket (3) and a second bracket (6), the output member being rotatably connected to the first bracket (3), the input member (5) being rotatably connected to the second bracket (6), the first bracket (3) being provided with a first connecting portion (33), the second bracket (6) being provided with a second connecting portion (61), the intermediate gear (4) being simultaneously rotatably connected to the first connecting portion (33) and the second connecting portion (61), the adjusting member (12) being used for rotating the first bracket (3) relative to the housing (1).

3. The rotational speed measuring device according to claim 2, characterized in that, The first bracket (3) is provided with an adjusting arm (32), and the adjusting member (12) abuts against the adjusting arm (32).

4. The rotational speed measuring device according to claim 3, characterized in that, An extending direction of the adjusting arm (32) is perpendicular to a direction of a center line connecting the intermediate gear (4) and the input member (5).

5. The rotational speed measuring device according to any one of claims 1 to 4, characterized in that, The adjusting member (12) is an adjusting bolt threadedly connected to the housing (1).

6. The rotational speed measuring device according to any one of claims 1-4, characterized in that, The adjusting member (12) includes an adjusting bolt and an elastic member (13), the adjusting bolt being threadedly connected to the housing (1), and two ends of the elastic member (13) respectively abutting against the adjusting bolt and one of the brackets.

7. The rotational speed measuring device according to claim 2, characterized in that A positioning member (11) is further provided on the housing (1), a steel ball (111) is provided at a lower end of the positioning member (11), a positioning groove (31) for accommodating the steel ball (111) is provided on the first bracket (3) along its circumferential direction, and the steel ball (111) can roll in the positioning groove (31).

8. The rotational speed measuring device according to claim 1, wherein The output member is a gear shaft (2), the sensor (7) is a rotational speed sensor, and the gear shaft (2) can drive an input shaft of the rotational speed sensor to rotate.

9. Axle assembly, including axle housing and half shaft, characterized in that, Further comprising the rotational speed measuring device according to any one of claims 1-8, the housing (1) being fixedly connected to a axle housing, and the input member (5) being splined to a half shaft.

10. A vehicle, characterized in that, Comprising the rotational speed measuring device according to any one of claims 1-8 or the axle assembly according to claim 9.

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