A torque angle sensor that is easy to assemble

Abstract

The utility model discloses a torque angle sensor which is easy to assemble, and relates to the technical field of angle sensors. The utility model comprises a shell, an upper rotor assembly, a magnetic gear, and a PCB board group. The top of the shell is connected with a gear cover, the bottom of the shell is connected with a back cover, the upper rotor assembly is an integrated injection molded part, and the injection molded part comprises a rotor sleeve, a target wheel, an integrated gear, a group of rotor buckles, a group of limiting walls, and a bushing. The magnetic gear is transmission-connected with the upper rotor assembly, the lower end of the integrated gear sequentially penetrates the PCB board group and the back cover, and the lower wall of the rotor buckle and the upper wall of the limiting wall form a limiting ring groove. The device realizes simplified assembly and multi-directional limiting of the rotor on the sensor, and enhances the stability of the sensor during operation.

Description

Technical Field

[0001] The utility model relates to the technical field of angle sensors, in particular to a torque angle sensor which is easy to assemble. Background Art

[0002] Existing torque angle sensors mostly use a gear transmission solution, using a large gear to drive the magnetic gear to rotate so that the sensing chip can output a signal, and the target wheel on the upper rotor also needs to record the angle, so the two need to be combined together, and the two are combined into one using a welding process, which increases the assembly process and is time-consuming and labor-intensive. Therefore, the existing torque angle sensors have complex assembly relationships, and in order to constrain movement, the sensor structure is complex, not compact enough, and has many assembly processes and defects. Utility Model Content

[0003] The purpose of the utility model is to provide a torque angle sensor that is easy to assemble in view of the existing technical defects, so as to solve the problems raised in the above background technology.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions: a torque angle sensor that is easy to assemble, comprising a shell, an upper rotor assembly, a magnetic gear, and a PCB board group. The top of the shell is connected to a gear cover, and the bottom of the shell is connected to a back cover. The upper rotor assembly is arranged inside the shell. The upper rotor assembly is an integral injection molded part, and the injection molded part includes a rotor sleeve, a target wheel, an integrated gear, a group of rotor buckles, a group of limiting walls, and a bushing. The magnetic gear is transmission-connected to the upper rotor assembly, and the lower end of the integrated gear sequentially penetrates the PCB board group and the back cover. The lower wall of the rotor buckle and the upper wall of the limiting wall form a limiting ring groove.

[0005] The utility model further describes that a first mounting groove and a second mounting groove are provided on the surface of the shell, a shell block is fixed to the inner wall of the first mounting groove, and a part of the shell block facing inward is located inside the limiting ring groove.

[0006] The utility model further describes that a rear cover convex wall is fixed on the side of the rear cover facing the upper rotor assembly, the top of the rear cover convex wall is located below the bushing, and the rear cover convex wall is surrounded by the outside of the lower end of the integrated gear, and a certain distance is reserved between the rear cover convex wall and the bushing.

[0007] The utility model further illustrates that the rear cover convex wall and the limiting wall have different diameters.

[0008] The utility model further describes that the bushing is fixedly connected to the outer wall of the integrated gear located above the PCB board group, a group of the rotor buckles and the limiting walls are respectively fixed to the upper surface of the bushing located outside the integrated gear, and the rotor buckles and the limiting walls are distributed in a ring-shaped staggered manner.

[0009] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0010] The upper rotor assembly adopts an integrated structure. After the rear cover, PCB board group and upper rotor assembly are assembled, the housing is sleeved on the upper rotor assembly, and the magnetic gear is meshed and assembled. Finally, the gear cover is sleeved on the upper rotor assembly and the magnetic gear, so that the sensor can be easily assembled and a certain amount of assembly time can be saved.

[0011] The rotor clip, limiting wall and rear cover convex wall are used to achieve radial and axial limiting of the upper rotor assembly, effectively avoiding the risk of the axial limiting of the rotor clip falling off. In addition, the rear cover convex wall and the limiting wall have different diameters, which can effectively prevent the upper rotor assembly from moving and improve operational stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the overall structure of the utility model after the gear cover and the plug cover are hidden;

[0015] Figure 3 It is an exploded schematic diagram of the overall structure of the utility model;

[0016] Figure 4 It is a schematic diagram of the structure of the upper rotor assembly of the utility model;

[0017] Figure 5 This is a schematic diagram of the top view of the upper rotor assembly of the utility model;

[0018] Figure 6 This utility model Figure 4 A schematic diagram of the cross-sectional structure of;

[0019] Figure 7 This utility model Figure 6 A schematic diagram of the enlarged structure of region A;

[0020] Figure 8 This is a schematic diagram of the housing structure of the utility model when viewed from above;

[0021] Fig. 9 This is a schematic diagram of the combined structure of the back cover and PCB board assembly of the utility model;

[0022] In the figure: 1. shell; 11. first connecting member; 12. second connecting member; 2. back cover; 21. rear cover convex wall; 3. upper rotor assembly; 31. rotor sleeve; 32. integrated gear; 33. rotor buckle; 34. limiting wall; 35. bushing; 36. reinforcing rib; 4. gear cover; 5. connector assembly; 6. magnetic gear; 7. shell block; 8. anti-rotation pin; 9. PCB board assembly; 91. first connecting slot; 92. second connecting slot. DETAILED DESCRIPTION

[0023] The following is a further non-limiting detailed description of the technical solution of the utility model in conjunction with the preferred embodiments and the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1 The utility model provides a technical solution: a torque angle sensor that is easy to assemble, including a shell 1, a gear cover 4 is connected to the top of the shell 1, and a back cover 2 is connected to the bottom of the shell 1. The shell 1, the gear cover 4, and the back cover 2 are assembled to form an outer cover structure of the sensor. A connector assembly 5 is connected to one side of the side wall of the shell 1. The connector assembly 5 includes a plug cover integrally formed with the shell 1 and a plug connector matched with the plug cover, which is used to complete the signal connection between the sensor and external components. An anti-rotation pin 8 is fixedly connected to one side of the upper surface of the shell 1, wherein the anti-rotation pin 8 is simple to manufacture and assemble, and can be tightly matched with the installation environment through elastic force, thereby realizing the non-rotatability of the shell 1. An upper rotor assembly 3 is also arranged inside the shell 1, and the upper rotor assembly 3 is an integral injection molded part, thereby simplifying the assembly process.

[0025] Specifically, refer to Figure 2 The upper rotor assembly 3 is connected to the magnetic gear 6 through gear meshing transmission. When the upper rotor assembly 3 rotates, the magnetic gear 6 is driven to rotate, so that the sensing chip receives the signal. The sensing chip is a conventional structure setting of the sensor and is not described here. In the figure, the upper rotor assembly 3 and the upper half of the magnetic gear 6 are protruded from the top of the housing 1 and are located inside the gear cover 4;

[0026] refer to Figure 3A first mounting groove and a second mounting groove are provided on the surface of the shell 1. The first mounting groove is used to pass through and place the upper rotor assembly 3, and the second mounting groove is used to place the magnetic gear 6. A shell block 7 arranged in a ring shape is fixed to the inner wall of the first mounting groove to realize the subsequent limiting function.

[0027] refer to Figure 4 - Figure 7 , the injection molded part includes a rotor sleeve, a target wheel, an integrated gear 32, a set of rotor buckles 33, a set of limiting walls 34, and a bushing 35;

[0028] The bushing 35 includes an inner ring, a group of target wheels are evenly distributed in a ring shape, the inner ring is fixed to the outer wall of the integrated gear 32, one end of the target wheel is embedded in the outer part of the inner ring, and the height of the inner ring is higher than the target wheel;

[0029] The outer wall of the rotor sleeve 31 is fixed to the inner wall of the integrated gear 32. The lower end of the integrated gear 32 is cylindrical, that is, there is no gear on the outside. The lower end of the integrated gear 32 is connected with the PCB board group 9 through the lower end. The lower end of the integrated gear 32 located below the PCB board group 9 is connected with the rear cover 2 through the lower end to ensure that the upper rotor assembly 3 does not interfere with the connection stability of the PCB board group 9 and the rear cover 2 during operation.

[0030] The bushing 35 is fixedly connected to the outer wall of the integrated gear 32 located above the PCB board group 9, and a group of rotor buckles 33 and a group of limiting walls 34 are respectively fixed to the upper surface of the bushing 35 located outside the integrated gear 32, and a group of rotor buckles 33 and a group of limiting walls 34 are distributed in an annular staggered manner. Figure 5 , a set of rotor buckles 33 and a set of limiting walls 34 are each provided with four;

[0031] Specific reference Figure 6 The rotor buckle 33 and the limiting wall 34 form a limiting ring groove through the lower wall and the upper wall of their respective protrusions. By pre-reserving a certain distance, a part of the shell block 7 facing the inner side is located inside the limiting ring groove. The contact surface between the rotor buckle 33 and the shell block 7 is set as an inclined surface inclined downward. The limiting ring groove formed by the lower wall of the rotor buckle 33 and the upper wall of the limiting wall 34 realizes the radial limitation of the upper rotor assembly 3.

[0032] Further, refer to Figure 3 , Figure 6 A rear cover convex wall 21 is fixed on one side of the rear cover 2 facing the upper rotor assembly 3, the top of the rear cover convex wall 21 is located below the bushing 35, and the rear cover convex wall 21 is arranged outside the lower end of the integrated gear 32, and a certain distance is reserved between the rear cover convex wall 21 and the bushing 35, and the rotor buckle 33 is used to limit the upward freedom of the housing block 7;

[0033] By setting the limiting wall 34, the limiting ring groove formed by the rotor buckle 33 and the limiting wall 34 also performs preliminary axial limiting on the upper rotor assembly 3, and evenly distributes the axial force to the rotor buckle 33 and the limiting wall 34, thereby improving the reliability of the upper rotor assembly 3. By setting the rear cover convex wall 21, further axial limiting of the upper rotor assembly 3 is achieved, that is, the limiting wall 34 and the rear cover convex wall 21 achieve multi-stage axial limiting, effectively avoiding the risk of the axial limiting of the rotor buckle 33 falling off. In addition, the rear cover convex wall 21 and the limiting wall 34 have different diameters, which can effectively prevent the upper rotor assembly 3 from moving and improve the operating stability.

[0034] Therefore, by means of radial limitation and axial limitation, movement between the upper rotor assembly 3 and the PCB board assembly 9 can be effectively prevented, thereby improving the accuracy of the sensor.

[0035] refer to Figure 8 , Fig. 9 A group of first connecting members 11 and a group of second connecting members 12 are fixed to the bottom of the shell 1. The PCB board group 9 and the back cover 2 are provided with first connecting grooves 91 and second connecting grooves 92 at positions corresponding to the first connecting members 11 and the second connecting members 12. During assembly, the first connecting member 11 and the second connecting member 12 are directly aligned with the positions of the first connecting grooves 91 and the second connecting grooves 92 respectively, so as to conveniently complete the connection and installation between the shell 1 and the PCB board group 9 and the back cover 2.

[0036] It should be supplemented that a plurality of reinforcing ribs 36 are fixedly connected between the rotor buckle 33 and the integrated gear 32 to strengthen the stable connection between the integrated gear 32 and the limiting wall 34 .

[0037] In this embodiment, the one-piece injection molding of the upper rotor assembly 3 is completed in advance, and then the rear cover 2, the PCB board group 9, and the upper rotor assembly 3 are assembled, and then the shell 1 is sleeved on the upper rotor assembly 3, and the shell block 7 is radially and axially limited by the rotor buckle 33, the limiting wall 34 and the rear cover convex wall 21 below, and the first connecting member 11 and the second connecting member 12 are respectively aligned with the positions of the first connecting groove 91 and the second connecting groove 92 for connection, and the simplified assembly of the upper rotor assembly 3 is completed above, and then the magnetic gear 6 is assembled for meshing between gears, and finally the gear cover 4 is sleeved on the upper rotor assembly 3 and the magnetic gear 6 to realize the simple assembly of the sensor.

[0038] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0039] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit them. Although the utility model is described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A torque angle sensor that is easy to assemble, characterized in that: include: A housing (1), wherein the top of the housing (1) is connected to a gear cover (4), and the bottom of the housing (1) is connected to a rear cover (2); An upper rotor assembly (3), the upper rotor assembly (3) being arranged inside the housing (1), the upper rotor assembly (3) being an integral injection-molded part, the injection-molded part comprising a rotor sleeve (31), a target wheel, an integrated gear (32), a set of rotor buckles (33), a set of limiting walls (34), and a bushing (35); A magnetic gear (6), the magnetic gear (6) being drivingly connected to the upper rotor assembly (3); The PCB board group (9) is provided, and the lower end of the integrated gear (32) sequentially penetrates and connects the PCB board group (9) and the rear cover (2).

2. The torque angle sensor that is easy to assemble according to claim 1, characterized in that: The lower wall of the rotor buckle (33) and the upper wall of the limiting wall (34) form a limiting ring groove, the surface of the shell (1) is provided with a first mounting groove and a second mounting groove, and the inner wall of the first mounting groove is fixed with a shell block (7); A portion of the housing block (7) facing inward is located inside the limiting ring groove.

3. A torque angle sensor that is easy to assemble according to claim 2, characterized in that: A rear cover convex wall (21) is fixed to a side of the rear cover (2) facing the upper rotor assembly (3), the top of the rear cover convex wall (21) is located below the bushing (35), and the rear cover convex wall (21) is arranged outside the lower end of the integrated gear (32), and a certain distance is reserved between the rear cover convex wall (21) and the bushing (35).

4. The torque angle sensor that is easy to assemble according to claim 3 is characterized in that: The rear cover convex wall (21) and the limiting wall (34) have different diameters.

5. A torque angle sensor that is easy to assemble according to claim 1 or 3, characterized in that: The bushing (35) is fixedly connected to the outer wall of the integrated gear (32) located above the PCB board group (9); a group of rotor buckles (33) and limiting walls (34) are respectively fixed to the upper surface of the bushing (35) located outside the integrated gear (32); and the rotor buckles (33) and limiting walls (34) are distributed in an annular and staggered manner.

6. The torque angle sensor that is easy to assemble according to claim 1, characterized in that: An anti-rotation pin (8) is fixedly connected to one side of the upper surface of the housing (1).

7. The torque angle sensor that is easy to assemble according to claim 1, characterized in that: The bushing (35) comprises an inner ring, the target wheels are evenly distributed in a ring shape, the inner ring is fixed to the outer wall of the integrated gear (32), one end of the target wheel is embedded in the outside of the inner ring, and the height of the inner ring is higher than the target wheel.

8. The torque angle sensor that is easy to assemble according to claim 1, characterized in that: A group of first connecting members (11) and a group of second connecting members (12) are fixed to the bottom of the housing (1), and a first connecting groove (91) and a second connecting groove (92) are formed on the PCB board group (9) and the back cover (2) at positions corresponding to the first connecting members (11) and the second connecting members (12).

9. The torque angle sensor that is easy to assemble according to claim 1, characterized in that: A plurality of reinforcing ribs (36) are fixedly connected between the rotor buckle (33) and the integrated gear (32).

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