Running-in equipment and meshing and holding mechanism thereof

Abstract

The utility model discloses running-in equipment and a meshing holding mechanism thereof, and relates to the technical field of running-in equipment, the running-in equipment comprises a worm gear, a wheel shaft, a clamping assembly, a driving piece and a magnetic powder brake, one end of the wheel shaft is coaxially connected with the worm gear, the other end of the wheel shaft is provided with wheel teeth, the wheel teeth are meshed with the clamping assembly, the output end of the driving piece is connected with the clamping assembly, and the magnetic powder brake is arranged on the driving piece. And the magnetic powder brake is connected with the driving piece. After the worm gear and the worm are meshed in place, the worm gear drives the wheel shaft to rotate, the driving piece drives the meshing and holding assembly to move towards the wheel shaft and is meshed and held with the wheel teeth in the wheel shaft rotating process, the driving piece is connected with the magnetic powder brake through the coupler, the magnetic powder brake provides loads for the wheel shaft, and therefore the requirement for full running-in of the worm gear and the worm before assembly is met.

Description

Technical Field

[0001] The utility model relates to the technical field of running-in equipment, in particular to running-in equipment and a meshing and clamping mechanism thereof. Background Art

[0002] At present, during the mass production of automotive rack and pinion electric power steering (P / DP-EPS), the worm gear pair in the transmission subassembly must be run-in during assembly. During the run-in, the run-in motor drives the worm through the coupling, and the magnetic powder brake provides a load to the output end of the worm shaft for loading and running-in. In the existing solution, the magnetic powder brake is directly loaded on the worm shaft, which requires the worm shaft to have a long smooth section. When the smooth section of the worm shaft is short, the magnetic powder brake will not be able to load, and thus cannot be applied to any size of worm shaft. Utility Model Content

[0003] 1. Technical problems to be solved by the utility model

[0004] In view of the above technical problems, the utility model provides a running-in device and an engaging and clamping mechanism thereof, which can be applicable to axles of any size.

[0005] 2. Technical solution

[0006] To solve the above problems, the technical solution provided by the utility model is: an engaging and clamping mechanism, including a worm gear, a wheel axle, a clamping assembly, a driving member and a magnetic powder brake, one end of the wheel axle is coaxially connected to the worm gear, and the other end of the wheel axle is provided with gear teeth, the gear teeth are engaged with the clamping assembly, the output end of the driving member is connected to the clamping assembly, and the magnetic powder brake is connected to the driving member.

[0007] Optionally, the clamping assembly includes a limiting frame and a rack installed inside the limiting frame, the limiting frame is provided with a through hole for the wheel axle to pass through, the outer wall of the limiting frame is provided with a limiting protrusion, the telescopic end of the driving member is connected to a guide plate, the inner wall of the guide plate is provided with a groove that slides with the limiting protrusion, and the limiting protrusion and the groove are both inclined so that when the driving member drives the guide plate to rise, the guide plate pushes the rack to engage with the wheel axle.

[0008] Optionally, a protective cover is provided on the outer periphery of the limiting enclosure, and the protective cover is provided with a through slot for the guide plate to pass through, and the worm gear, axle, protective cover, driving member and magnetic powder brake are all on the same axis.

[0009] Optionally, a first shell is sleeved on the outer periphery of the protective cover, and a first bearing is provided between the protective cover and the first shell.

[0010] Optionally, the worm gear is sleeved with a second shell, the second shell includes a wheel shell and a rod shell, the wheel shell is provided with a first cavity and a second cavity connected to the first cavity, the worm gear is located in the first cavity, the inner peripheral wall of the second cavity is provided with an annular groove, the outer peripheral wall of the wheel axle is sleeved with a second bearing, the second bearing is installed in the annular groove, and the rod shell is used to place the worm.

[0011] Optionally, the second shell is detachably connected to the first shell.

[0012] Optionally, the first cavity is covered with a cover, and the cover is detachably connected to the wheel housing.

[0013] The utility model also discloses a running-in device, comprising a worm and the above-mentioned meshing and clamping mechanism, wherein the worm is meshed with a worm wheel.

[0014] 3. Beneficial effects

[0015] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0016] The meshing and clamping mechanism proposed in the embodiment of the present application, after the worm wheel and the worm are meshed in place, the worm wheel drives the wheel shaft to rotate, the driving member drives the meshing and clamping assembly to move toward the wheel shaft, and meshes and clamps with the gear teeth during the rotation of the wheel shaft. The driving member is connected to the magnetic powder brake through a coupling, and the magnetic powder brake provides a load for the wheel shaft to meet the requirement of sufficient running-in of the worm wheel before assembly. Since the wheel shaft is provided with gear teeth, the meshing and clamping mechanism in this embodiment can be applied to wheel shafts of any size. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the load applied to the worm gear shaft by a magnetic powder brake in conventional technology.

[0018] Figure 2 A schematic diagram of the engagement and clamping mechanism proposed in an embodiment of the utility model.

[0019] Figure 3 An exploded view of the engagement and clamping mechanism proposed in an embodiment of the utility model.

[0020] Figure 4 A schematic diagram of a clamping assembly of the meshing clamping mechanism proposed in an embodiment of the utility model.

[0021] Figure 5 A schematic diagram of the second shell of the engagement and clamping mechanism proposed in an embodiment of the utility model.

[0022] The marks in the drawings are: 1, worm gear; 2, wheel shaft; 21, smooth section; 22, gear teeth; 3, clamping assembly; 31, limit bracket; 311, limit convex block; 32, rack; 33, protective cover; 331, through groove; 4, driving member; 41, guide plate; 411, groove; 5, magnetic powder brake; 6, first housing; 7, first bearing; 8, second housing; 81, wheel housing; 811, first cavity; 812, second cavity; 813, ring groove; 82, rod housing; 9, second bearing; DETAILED DESCRIPTION

[0023] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings and embodiments.

[0024] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It should also be noted that, for the convenience of description, only the parts related to the utility model are shown in the accompanying drawings. The words "first", "second", etc. described in the present utility model are set for the convenience of describing the technical solution of the present utility model, and have no specific limiting effect. They are all general references and do not constitute a limiting effect on the technical solution of the present utility model. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments in the present application can be combined with each other. In the description of the present utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present utility model 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 cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood 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 a direct connection or an indirect connection through an intermediate medium, or it can be a connection between the insides of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. Multiple technical solutions in the same embodiment, and multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions that do not have contradictions or conflicts, all of which are within the scope of protection required by the present utility model.

[0025] Example 1

[0026] Combined with Figure 2 and3 The meshing and clamping mechanism of this embodiment includes a worm wheel 1, a wheel shaft 2, a clamping assembly 3, a driving member 4 and a magnetic powder brake 5. One end of the wheel shaft 2 is coaxially connected to the worm wheel 1, and the other end of the wheel shaft 2 is provided with a gear 22, and the gear 22 is meshed with the clamping assembly 3. The output end of the driving member 4 is connected to the clamping assembly 3, and the magnetic powder brake 5 is connected to the driving member 4. After the worm wheel 1 is meshed with the worm, the worm wheel 1 drives the wheel shaft 2 to rotate, and the driving member 4 drives the meshing and clamping assembly to move toward the wheel shaft 2. During the rotation of the wheel shaft 2, the driving member 4 is connected to the magnetic powder brake 5 through a coupling, and the magnetic powder brake 5 provides a load for the wheel shaft 2, so as to meet the requirement of sufficient running-in of the worm wheel 1 and the worm before assembly. Since the wheel shaft 2 is provided with a gear 22, the meshing and clamping mechanism in this embodiment can be applied to the wheel shaft 2 of any size. The driving member 4 can be a cylinder or a hydraulic cylinder.

[0027] Example 2

[0028] Combined with Figure 3 and 4 Compared with the technical solution of Example 1, the meshing and clamping mechanism of this embodiment can be improved as follows: the clamping assembly 3 includes a limiting frame 31 and a rack 32 installed inside the limiting frame 31, the limiting frame 31 is provided with a through hole for the wheel axle 2 to pass through, the outer wall of the limiting frame 31 is provided with a limiting protrusion 311, the telescopic end of the driving member 4 is connected to a guide plate 41, the inner wall of the guide plate 41 is provided with a groove 411 that slidably cooperates with the limiting protrusion 311, and the limiting protrusion 311 and the groove 411 are both inclined so that when the driving member 4 drives the guide plate 41 to rise, the guide plate 41 pushes the rack 32 to engage with the wheel axle 2. The telescopic end of the driving member 4 drives the guide plate 41 to rise. Since the groove 411 and the limiting protrusion 311 are in an inclined sliding fit, during the rising process of the guide plate 41, the groove 411 pushes the limiting protrusion 311 to move horizontally, and then pushes the limiting frame 31 to move horizontally, so that the rack 32 is engaged with the wheel axle 2, which facilitates the magnetic powder brake 5 to apply load to the wheel axle 2 through the rack 32.

[0029] Example 3

[0030] Combined with Figure 3 Compared with the technical solutions of embodiment 1 or 2, the meshing and clamping mechanism of this embodiment can be improved as follows: the outer periphery of the limiting enclosure 31 is provided with a protective cover 33, and the protective cover 33 is provided with a through slot 331 for the guide plate 41 to pass through, and the worm wheel 1, the wheel shaft 2, the protective cover 33, the driving member 4, and the magnetic powder brake 5 are all on the same axis. The magnetic powder brake 5 drives the guide plate 41 to rotate through the driving member 4, and the guide plate 41 drives the limiting enclosure 31 and the protective cover 33 to rotate. At the same time, the limiting enclosure 31 drives the rack 32 to rotate, thereby applying a load to the worm wheel 1 and the worm, and the protective cover protects the clamping assembly 3 inside.

[0031] Example 4

[0032] Combined with Figure 3 Compared with any one of the technical solutions in Examples 1-3, the meshing and clamping mechanism of this embodiment can be improved as follows: a first shell 6 is sleeved on the outer periphery of the protective cover 33 , and a first bearing 7 is provided between the protective cover and the first shell 6 .

[0033] Example 5

[0034] Combined with Figure 5 Compared with any one of the technical solutions in Examples 1 to 4, the meshing and clamping mechanism of this embodiment can be improved as follows: the outer periphery of the worm wheel 1 is sleeved with a second housing 8, the second housing 8 includes a wheel housing 81 and a rod housing 82, the wheel housing 81 is provided with a first cavity 811 and a second cavity 812 communicating with the first cavity 811, the worm wheel 1 is located in the first cavity 811, the inner peripheral wall of the second cavity 812 is provided with an annular groove 813, the outer peripheral wall of the wheel shaft 2 is sleeved with a second bearing 9, the second bearing 9 is installed in the annular groove 813, and the rod housing 82 is used to place the worm. The inner ring of the second bearing 9 is sleeved on the outer peripheral wall of the wheel shaft 2, and the outer ring of the second bearing 9 is installed in the annular groove 813, so that the wheel shaft 2 is rotatably connected with the wheel housing 81 in the radial direction, and the setting of the annular groove 813 makes the wheel shaft 2 and the wheel housing 81 fixedly connected in the axial direction.

[0035] Example 6

[0036] Combined with Figure 2 Compared with any one of the technical solutions in Examples 1-5, the meshing and clamping mechanism of this embodiment can be improved as follows: the second shell 8 is detachably connected to the first shell 6.

[0037] Example 7

[0038] Combined with Figure 2 Compared with any one of the technical solutions in embodiments 1 to 6, the meshing and clamping mechanism of this embodiment can be improved as follows: the first cavity 811 is covered with a cover, and the cover is detachably connected to the wheel housing 81. The cover protects the worm wheel 1 inside.

[0039] Example 8

[0040] The running-in device of this embodiment comprises a worm and the meshing and clamping mechanism described in any one of the technical solutions of Embodiments 1 to 7, wherein the worm meshes with the worm wheel 1 .

[0041] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A meshing and clamping mechanism, characterized in that: It includes a worm gear, a wheel shaft, a clamping assembly, a driving member and a magnetic powder brake. One end of the wheel shaft is coaxially connected to the worm gear, and the other end of the wheel shaft is provided with gear teeth, which are meshed with the clamping assembly. The output end of the driving member is connected to the clamping assembly, and the magnetic powder brake is connected to the driving member.

2. The meshing and clamping mechanism according to claim 1, characterized in that: The clamping assembly includes a limiting frame and a rack installed inside the limiting frame, the limiting frame is provided with a through hole for the wheel axle to pass through, the outer wall of the limiting frame is provided with a limiting protrusion, the telescopic end of the driving member is connected to a guide plate, the inner wall of the guide plate is provided with a groove that slides with the limiting protrusion, and the limiting protrusion and the groove are both inclined so that when the driving member drives the guide plate to rise, the guide plate pushes the rack to engage with the wheel axle.

3. The meshing and clamping mechanism according to claim 2, characterized in that: A protective cover is arranged on the outer periphery of the position-limiting enclosure, and the protective cover is provided with a through slot for the guide plate to pass through. The worm gear, the wheel shaft, the protective cover, the driving member and the magnetic powder brake are all on the same axis.

4. The meshing and clamping mechanism according to claim 3, characterized in that: A first shell is sleeved on the outer periphery of the protective cover, and a first bearing is arranged between the protective cover and the first shell.

5. The meshing and clamping mechanism according to claim 4, characterized in that: The worm gear is sleeved with a second shell, the second shell includes a wheel shell and a rod shell, the wheel shell is provided with a first cavity and a second cavity connected to the first cavity, the worm gear is located in the first cavity, the inner peripheral wall of the second cavity is provided with an annular groove, the outer peripheral wall of the wheel shaft is sleeved with a second bearing, the second bearing is installed in the annular groove, and the rod shell is used to place the worm.

6. The meshing and clamping mechanism according to claim 5, characterized in that: The second shell is detachably connected to the first shell.

7. The meshing and clamping mechanism according to claim 5, characterized in that: The first cavity is covered with a cover body, and the cover body is detachably connected to the wheel shell.

8. A running-in device, characterized in that: It comprises a worm and the meshing and clamping mechanism according to any one of claims 1 to 7, wherein the worm meshes with the worm wheel.

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