Angle torque sensor

Abstract

The present invention relates to the field of sensor technology, and in particular to an angle torque sensor, which includes a housing, an inner rotor assembly and a floating compensation mechanism, wherein an annular inner rotor support portion is provided in the middle of the housing, and a support flange protruding inward is provided on the top of the inner rotor support portion, and the inner rotor assembly includes a base, a sleeve, an upper support and a lower support, the base is rotatably connected to the housing, the sleeve is fixedly mounted on the base, the upper support is fixedly sleeved on the upper part of the sleeve, and the lower support is floatingly sleeved on the middle part of the sleeve, the support flange is located between the upper support and the lower support and forms a conical surface with the upper support and the lower support, and the floating compensation mechanism is installed between the lower support and the housing or the base. The sensor provided by the present invention is easy to manufacture and assemble, can realize automatic centering and simultaneous compensation in radial and vertical directions, has stable and reliable operation and high measurement accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of sensors, and in particular to an angle torque sensor. Background Art

[0002] Angle torque sensor is a precision measuring instrument for measuring various torques, rotation speeds and mechanical powers. It has a wide range of applications, mainly used for: 1. Detection of output torque and power of rotating power equipment such as motors, engines, and internal combustion engines. The inner rotor assembly of the angle torque sensor rotates in the middle of the shell, and the rotating support will produce friction. After long-term friction, the surface of the parts will wear and produce gaps. For the sensor, this gap will seriously affect the accuracy of the sensor and cause many measurement errors. In order to overcome wear, an automatic compensation mechanism is required to allow the sensor to maintain the same accuracy as the new state during use. However, existing angle torque sensors can generally only achieve radial compensation, and cannot achieve simultaneous compensation in the radial and vertical directions, and are not convenient to manufacture and assemble. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an angle torque sensor which is easy to manufacture and assemble, can realize automatic centering and simultaneous compensation in radial and vertical directions, has stable and reliable operation and high measurement accuracy.

[0004] The present invention is achieved through the following technical solutions:

[0005] An angular torque sensor comprises a shell, an inner rotor assembly and a floating compensation mechanism, wherein an annular inner rotor support portion is provided in the middle of the shell, and a support flange protruding inward is provided on the top of the inner rotor support portion, and the inner rotor assembly comprises a base, a sleeve, an upper support and a lower support, wherein the base is rotatably connected to the shell, the sleeve is fixedly mounted on the base, the upper support is fixedly sleeved on the upper part of the sleeve, and the lower support is floatingly sleeved on the middle part of the sleeve, the support flange is located between the upper support and the lower support and forms a conical surface with the upper support and the lower support, and the floating compensation mechanism is installed between the lower support and the shell or the base.

[0006] Optimally, the floating compensation mechanism is a compensation spring, which is fixedly mounted on the base and has a top that abuts against the lower surface of the lower support.

[0007] Optimally, the floating compensation mechanism is a compensation spring, the bottom of which is fixedly mounted on the shell and the top is rotatably connected to the lower surface of the lower support.

[0008] Optimized, the floating compensation mechanism is an elastic compensation ring, which includes a ring body and a plurality of elastic compensation plates evenly arranged along the periphery of the ring body and expanded outwardly, the ring body is fixedly mounted outside the sleeve, and the plurality of elastic compensation plates are against the lower surface of the lower support.

[0009] Furthermore, the base includes an auxiliary support member at the bottom, an auxiliary support convex ring is provided in the middle of the auxiliary support member, a plurality of teeth are evenly provided on the outside of the auxiliary support member, and a shell groove is opened at a position corresponding to the auxiliary support convex ring. The auxiliary support convex ring is located in the shell groove with a gap.

[0010] Optimally, the upper and lower surfaces inside the support flange are inclined surfaces, and the lower surface of the upper support and the upper edge surface of the lower support are provided with inclined surfaces matching the support flange.

[0011] Furthermore, an upper support groove is provided in the middle of the lower surface of the upper support, and two groove inclined surfaces are provided inside the upper support groove. The upper surface of the support flange is provided with two inclined surfaces that form a conical surface with the two groove inclined surfaces.

[0012] Furthermore, an inclined groove is provided on the top of the lower support, an auxiliary bearing component is fixedly mounted on the outer wall of the sleeve, and the auxiliary bearing component is obliquely inserted into the inclined groove.

[0013] Optimally, the sleeve is made of metal material, and the contact surfaces between the upper support and the lower support and the inner rotor support portion are made of metal material.

[0014] Beneficial effects of the present invention

[0015] The angle torque sensor protected by the present invention has the following advantages:

[0016] 1. Simple structure, easy to manufacture and assemble.

[0017] 2. The support flange forms a conical surface with the upper support and the lower support, which ensures automatic centering in terms of structure. Moreover, during the long-term wear process, the conical surface remains a conical surface after uniform wear, thereby always maintaining good centering of the overall structure, reducing the accuracy deviation after wear and solving the misalignment problem.

[0018] 3. The structure is equipped with a floating compensation mechanism, which can lift the lower support and give it an upward preload, so that the support flange can achieve a good gapless contact with the upper and lower supports, and the inner rotor assembly can run smoothly. When wear occurs, the floating compensation mechanism can automatically compensate for the wear and ensure that the support flange and the upper and lower supports always achieve a good conical surface fit, thereby ensuring the smooth operation and measurement accuracy.

[0019] 4. By cooperating with the conical surface formed between the support flange and the upper support and the lower support, and cooperating with the elastic compensation mechanism, both radial compensation and vertical compensation can be achieved.

[0020] 5. The inclined surface of the structural design allows the friction dust to fall to the lower area, so that the friction dust can quickly leave the friction surface without affecting the relative operation of the contact surface. Moreover, the product is upside down and has the same inclined surface, which is convenient for dust to fall. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention;

[0022] Figure 2 This is one of the schematic diagrams of the floating compensation mechanism;

[0023] Figure 3 This is the second schematic diagram of the floating compensation mechanism;

[0024] Figure 4 This is the third schematic diagram of the floating compensation mechanism;

[0025] Figure 5 This is the fourth schematic diagram of the floating compensation mechanism;

[0026] Figure 6 This is the fifth schematic diagram of the floating compensation mechanism;

[0027] Figure 7 It is a schematic diagram of the structure of the elastic compensation ring;

[0028] Figure 8 This is a schematic diagram of the assembly structure of the inner rotor assembly;

[0029] In the figure, 1. housing, 2. lower support, 3. upper support, 4. sleeve, 5. base, 6. floating compensation mechanism, 7. auxiliary support, 8. inner rotor support, 9. support flange, 10. compensation spring, 11. upper support groove, 12. housing groove, 13. auxiliary support convex ring, 14. bearing, 15. inclined groove, 16. auxiliary bearing member, 17. ring body, 18. elastic compensation sheet, 19. elastic compensation ring, 20. teeth. DETAILED DESCRIPTION

[0030] An angular torque sensor comprises a shell 1, an inner rotor assembly and a floating compensation mechanism 6. An annular inner rotor support portion 8 is provided in the middle of the shell, and an inwardly protruding support flange 9 is provided on the top of the inner rotor support portion. The support flange and the shell can be integrally formed to facilitate manufacturing and assembly.

[0031] The inner rotor assembly includes a base 5, a sleeve 4, an upper support 3 and a lower support 2. The base is rotatably connected to the shell, and the sleeve is fixedly installed on the base. The sleeve and the base can be welded or integrally injection molded. The upper support is fixedly sleeved on the upper part of the sleeve. The two can be integrally injection molded or fixed by clamping or other methods.

[0032] The lower support is floatingly mounted in the middle of the sleeve, and the support flange is located between the upper support and the lower support and forms a conical surface with the upper support and the lower support, which can realize automatic centering of the structure, and in the long-term wear process, the conical surface remains a conical surface after uniform wear, which is equivalent to a conical bearing fit, always keeping the overall structure well centered, reducing the accuracy deviation after wear, and realizing smooth rotation of the inner rotor assembly relative to the housing.

[0033] The floating compensation mechanism is installed between the lower support and the housing or base, which can lift the lower support and give the lower support an upward preload. There can be multiple floating compensation mechanisms, which are arranged along the periphery of the sleeve, so that a good gapless contact can be achieved between the support flange and the upper and lower supports, and the inner rotor assembly can be operated smoothly. When wear occurs, the floating compensation mechanism can automatically compensate for the wear amount, ensuring that good conical surface friction is always achieved, thereby ensuring the smoothness of operation and measurement accuracy.

[0034] And through the cooperation of the floating compensation mechanism and the conical surface, the inner rotor assembly can realize both radial compensation and vertical compensation at the same time, further ensuring good gapless contact between the support flange and the upper support and the lower support, realizing the smooth rotation of the inner rotor assembly relative to the housing, and ensuring the measurement accuracy of the angle torque sensor.

[0035] The optimized floating compensation mechanism is a compensation spring 10, which is fixedly mounted on the base and the top of the compensation spring is against the lower surface of the lower support. The compensation spring is fixedly mounted on the base. Through the friction between the compensation spring and the lower support, the lower support and the compensation spring can rotate with the sleeve and the base when the angle torque sensor is working, so that the upper support and the lower support and the support flange form a tapered bearing-like fit, and when the fit is worn, due to the restoring force of the compensation spring, the support flange can always achieve good gapless contact with the upper support and the lower support, as shown in the attached figure. Figure 2 , as shown in 3.

[0036] The optimized floating compensation mechanism is a compensation spring, the bottom of which is fixedly mounted on the shell and the top is rotatably connected to the lower surface of the lower support. Specifically, a bearing 14 can be installed between the lower support and the compensation spring, and the tops of multiple compensation springs are against the bottom of the bearing seat. When the angle torque sensor is working, the bottom of the compensation spring is fixedly mounted on the shell and does not move, while the lower support can rotate with the sleeve. When wear occurs at the mating part, due to the restoring force of the compensation spring, the support flange can always achieve good gapless contact with the upper support and the lower support, as shown in the attached figure. Figure 4 ,5,6 as shown.

[0037] The optimized floating compensation mechanism is an elastic compensation ring 19, which includes a ring body 17 and a plurality of elastic compensation sheets 18 evenly arranged along the periphery of the ring body and expanded outwards. Figure 7 As shown in FIG8 , the ring body is fixedly mounted outside the sleeve, and the plurality of elastic compensation sheets abut against the lower surface of the lower support. The plurality of elastic compensation sheets support the lower support so that the lower support rotates with the sleeve. Compared with the spring compensation structure, the structure is simpler, the assembly is more convenient, and the stability of the compensation is further improved.

[0038] Furthermore, the base includes an auxiliary support member 7 at the bottom, an auxiliary support convex ring 13 is provided in the middle of the auxiliary support member, a plurality of teeth 20 are evenly provided on the outside of the auxiliary support member, a shell groove 12 is provided at a position corresponding to the auxiliary support convex ring, the auxiliary support convex ring is located in the shell groove and a gap is left, when the inner rotor assembly rotates, a rotation connection is formed between the shell groove and the auxiliary support convex ring, which is equivalent to a bearing, the auxiliary support convex ring is located in the shell groove and a gap is left so that the auxiliary support member can rotate freely and stably relative to the shell, and when the conical surface between the support flange and the upper support and the lower support is worn, a stable support is formed between the auxiliary support member and the shell to prevent the inner rotor assembly from being eccentric. For details, see the attached Figure 4 ,5,6,8 as shown.

[0039] Optimized, the upper and lower surfaces on the inner side of the support flange are inclined surfaces, and the lower surface of the upper support and the upper edge of the lower support are provided with inclined surfaces that match the support flange. This arrangement forms a conical surface match between the support flange and the upper and lower supports, which is equivalent to a conical bearing, so that the inner rotor assembly can rotate stably and always keep the overall structure well aligned, reducing the accuracy deviation after wear and solving the misalignment problem. And when wear occurs, under the action of the floating compensation mechanism, radial compensation can be achieved, and vertical compensation can also be achieved. For details, please see the attached Figure 2 ,4,6 as shown.

[0040] Furthermore, an upper support groove 11 is provided in the middle of the lower surface of the upper support, and two groove inclined surfaces are provided inside the upper support groove. The upper surface of the support flange is provided with two inclined surfaces, which form a conical surface to match the two groove inclined surfaces. In this way, adding a conical surface to match between the upper support and the support flange can increase the contact area between the upper support and the support flange, further offset the eccentric force on the structure, and improve the impact resistance. For details, see the attached Figure 3 , as shown in Figure 5.

[0041] Furthermore, an inclined groove 15 is provided on the top of the lower support, and an auxiliary bearing member 16 is fixedly installed on the outer wall of the sleeve. The auxiliary bearing member is obliquely inserted into the inclined groove, which is equivalent to adding an additional bearing structure between the sleeve and the lower support, which can reduce the overall gap, better control the accuracy of the system, offset the eccentric force on the structure, and have stronger impact resistance. Figure 6 shown.

[0042] Optimized, the sleeve is made of metal material, and the contact surface between the upper support and the lower support and the inner rotor support part is made of metal material. The upper support and the lower support and the support flange of the inner rotor support part can be made of metal parts as a whole, and the upper support and the sleeve can be fixed by metal welding or clamping. The strength of this structure is much safer than the existing upper support and sleeve on the market, which are both plastic structures. The clamping structure between the two is much safer, and there will be no safety risk accidents of plastic detachment. It is also possible to use metal inserts in the contact parts between the upper support, the lower support and the support flange, so that the contact parts are metal, which is more wear-resistant and prolongs the service life of the angle torque sensor. In addition, during relative motion friction, very little waste chips are generated, and it is very easy to discharge from the conical surface, which will not affect the stable operation of the inner rotor assembly.

[0043] In specific applications, the metal inserts can be integrally injection-molded with the upper support, the lower support and the support flange, respectively, to facilitate manufacturing and assembly and ensure the stability of the overall structure.

[0044] An angle torque sensor protected by the present invention has a PCB board (not shown) installed on the shell at a position corresponding to the multiple teeth of the auxiliary support member. When the angle torque sensor is working, the inner rotor assembly rotates with the detected component, and the multiple teeth outside the auxiliary support member rotate accordingly. The PCB board generates magnetic lines of force and monitors the cutting effect of the inner rotor assembly on the magnetic lines of force and the disturbance of the magnetic field during the rotation process. Then, through signal processing and calculation of multiple chips, the precise angle of rotation of the inner rotor assembly can be known, thereby obtaining the rotation angle and torque value of the detected component.

[0045] Because the angle torque sensor protected by the present invention forms a stable conical surface fit between the support flange and the upper support and the lower support, and cooperates with the floating compensation mechanism, not only can the structure ensure automatic centering, but also the inner rotor assembly can achieve both radial compensation and vertical compensation at the same time, ensuring the smooth rotation of the inner rotor assembly relative to the housing, thereby ensuring the measurement accuracy of the angle torque sensor.

[0046] In summary, the angular torque sensor protected by the present invention is easy to manufacture and assemble, can achieve automatic centering and simultaneous compensation in radial and vertical directions, has stable and reliable operation and high measurement accuracy.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An angle torque sensor, characterized in that: The invention comprises a shell, an inner rotor assembly and a floating compensation mechanism, wherein an annular inner rotor support portion is provided in the middle of the shell, and a support flange protruding inward is provided on the top of the inner rotor support portion, and the inner rotor assembly comprises a base, a sleeve, an upper support and a lower support, wherein the base is rotatably connected to the shell, the sleeve is fixedly mounted on the base, the upper support is fixedly sleeved on the upper part of the sleeve, the lower support is floatingly sleeved on the middle part of the sleeve, the support flange is located between the upper support and the lower support and forms a conical surface with the upper support and the lower support, and the floating The compensation mechanism is installed between the lower support and the shell or the base. The inner upper surface and lower surface of the support flange are inclined surfaces. The lower surface of the upper support and the upper edge surface of the lower support are provided with inclined surfaces matching the support flange. An upper support groove is provided in the middle of the lower surface of the upper support, and two groove inclined surfaces are provided on the inner side of the upper support groove. Two inclined surfaces are provided on the upper surface of the support flange to form a conical surface. An inclined groove is opened at the top of the lower support, and an auxiliary bearing component is fixedly installed on the outer wall of the sleeve, and the auxiliary bearing component is obliquely inserted into the inclined groove.

2. An angle torque sensor according to claim 1, characterized in that: The floating compensation mechanism is a compensation spring, which is fixedly mounted on the base and has a top that abuts against the lower surface of the lower support.

3. The angular torque sensor according to claim 1, characterized in that: The floating compensation mechanism is a compensation spring, the bottom of which is fixedly mounted on the shell and the top of which is rotatably connected to the lower surface of the lower support.

4. The angular torque sensor according to claim 1, characterized in that: The floating compensation mechanism is an elastic compensation ring, which includes a ring body and a plurality of elastic compensation sheets evenly arranged along the periphery of the ring body and spread outward. The ring body is fixedly mounted outside the sleeve, and the plurality of elastic compensation sheets are against the lower surface of the lower support.

5. The angular torque sensor according to claim 1, characterized in that: The base includes an auxiliary support member at the bottom, an auxiliary support convex ring is provided in the middle of the auxiliary support member, a plurality of teeth are evenly provided on the outside of the auxiliary support member, and a shell groove is opened at a position corresponding to the auxiliary support convex ring. The auxiliary support convex ring is located in the shell groove with a gap.

6. The angular torque sensor according to claim 1, characterized in that: The sleeve is made of metal material, and the contact surfaces between the upper support and the lower support and the inner rotor support part are made of metal material.

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