Signal device of resistance type force torque sensor

Abstract

The utility model provides a signal device of a resistance type force and torque sensor, and relates to the field of force and torque sensors. The sensor comprises a shaft seat, a strain gauge, a sensor stator and a sensor rotor, a plurality of elastic pieces are arranged between the sensor rotor and the sensor stator, the shaft seat is fixed with the sensor stator through a connecting rod, the strain gauge is fixed on the sensor stator and the connecting rod, and an anti-fatigue assembly is arranged on the elastic pieces. The method has the effect of reducing fatigue loss.

Description

Technical Field

[0001] The present application relates to the field of force and torque sensors, and in particular to a signal device of a resistive force and torque sensor. Background Art

[0002] Resistive force-torque sensors are used to measure torque. Their operating principle is based on the resistor strain effect; when subjected to torque, the strain gauge deforms, changing its resistance. They are widely used in various mechanical devices, such as automobiles and industrial machinery, to monitor torque changes in real time to ensure proper operation and safety.

[0003] At present, in the relevant technology, the elastic torque sensor disclosed in the Chinese patent with the authorization publication number CN105606279B is composed of a sensor outer ring, several elastomers, a sensor inner ring, an inner ring strain gauge, a connecting beam, a connecting beam strain gauge and a central base; wherein the elastomers are evenly distributed along the circumference, and the two ends are respectively connected to the sensor outer ring and the sensor inner ring; each elastomer is composed of two symmetrical elastomer units; connecting beams are evenly arranged between the sensor inner ring and the central base; the surface of each connecting beam is pasted with a connecting beam strain gauge; the upper and lower surfaces of the sensor inner ring are pasted with an inner ring strain gauge; the flexible torque sensor of this application has a certain filtering effect on the impact of the outer elastomer itself, so the short-term impact force acting on the internal torque sensor will also be greatly reduced.

[0004] However, after long-term use, the elastomer will suffer from severe fatigue loss, that is, the service life of the elastomer will be greatly reduced, which may easily lead to the inability to monitor torque. Utility Model Content

[0005] In order to improve the problems existing in the above-mentioned technology, the present application provides a signal device of a resistive force torque sensor.

[0006] The present application provides a signal device for a resistive force and torque sensor, which adopts the following technical solution:

[0007] A signal device for a resistive force and torque sensor includes: a shaft seat, a strain gauge, a sensor stator and a sensor mover, a plurality of elastic parts are arranged between the sensor mover and the sensor stator, the shaft seat is fixed to the sensor stator via a connecting rod, the strain gauge is fixed to the sensor stator and the connecting rod, and an anti-fatigue component is provided on the elastic part.

[0008] By adopting the above technical solution, the anti-fatigue component can maintain the elastic part to reduce the fatigue loss of the elastic part, thereby extending the service life of the elastic part; and can improve the stability of the torque transmitted by the elastic part.

[0009] Optionally, the anti-fatigue component includes: an application part and a control part, the application part includes: a close-fitting cotton and a metal column, the metal column is fixed on the elastic part, the close-fitting cotton is fixed between the elastic part and the metal column, an oil cavity is opened on the metal column, an oil outlet hole is opened through the inner wall of the oil cavity, and the control part is arranged in the oil outlet hole.

[0010] By adopting the above technical solution, the phase-adhering sponge can absorb the lubricating oil discharged from the oil outlet, and continuously spread it to the entire phase-adhering sponge to be applied to the elastic part, thereby maintaining the elastic part.

[0011] Optionally, the control part includes: a mesh plate, a blocking rod, a blocking plate and a reset spring, the mesh plate is fixed in the oil outlet hole, the blocking plate is arranged in the oil outlet hole, and a blocking hole is opened through the blocking plate, one end of the blocking rod is fixed to the mesh plate, and the other end is arranged in the blocking hole, and the reset spring is fixed between the mesh plate and the blocking plate.

[0012] By adopting the above technical solution, when the metal column is deformed, the lubricating oil in the oil chamber is squeezed into the oil outlet hole, and the lubricating oil will squeeze the blocking plate to make the blocking plate move away from the mesh plate, that is, the blocking rod is detached from the blocking hole, so that the lubricating oil can flow through the blocking hole to the adjacent cotton, so that the adjacent cotton can absorb the lubricating oil and apply it.

[0013] Optionally, a connecting component is provided between the elastic member and the sensor stator and the sensor mover, and the connecting component includes: a connecting plate and a connecting spring. Connecting holes are provided on the sensor stator and the sensor mover. The connecting plate is provided in the connecting hole and fixedly connected to the elastic member. The connecting spring is fixed between the connecting plate and the bottom of the connecting hole.

[0014] By adopting the above technical solution, when the elastic part is subjected to torque impact force, the connecting plate can move in the connecting hole and pull the connecting spring, that is, the connecting spring can be deformed to absorb the torque impact force, thereby reducing the fatigue loss of the elastic part.

[0015] Optionally, the connecting assembly further includes: a connecting hook and a connecting ring, the connecting hook is fixed on the connecting plate, the connecting ring is fixed on the elastic member, and the connecting ring is hung on the connecting hook.

[0016] By adopting the above technical solution, after the elastic member cannot be used, the connecting ring can be removed from the connecting hook, and the elastic member can be separated from the sensor stator and the sensor mover, so that the elastic member can be replaced.

[0017] Optionally, the control unit further includes: a sealing sleeve, which is fixedly mounted on the blocking plate.

[0018] By adopting the above technical solution, the sealing sleeve is used to improve the sealing between the blocking plate and the inner wall of the oil outlet hole.

[0019] Optionally, the connecting assembly further includes: a limit block, a limit groove is provided on the inner wall of the connecting hole, the limit block is slidably disposed in the limit groove, and the limit block is fixedly connected to the connecting plate.

[0020] By adopting the above technical solution, the limiting block can prevent the connecting plate from completely sliding out of the connecting hole.

[0021] Optionally, the anti-fatigue component also includes: a pressing part, the pressing part includes: a pressing rod, a pressing plate and a pressing spring, a pressing hole is opened on the metal column, the pressing plate is arranged in the oil chamber, one end of the pressing rod is arranged in the pressing hole, and the other end is fixed to the pressing plate, the pressing spring is sleeved on the pressing rod and one end is fixed to the pressing rod, and the other end is fixed to the bottom of the pressing hole.

[0022] By adopting the above technical solution, if the deformation force is not enough to squeeze the lubricating oil, the staff can press the pressing rod, and the pressing plate will squeeze the lubricating oil, thereby ensuring that the lubricating oil can flow to the adjacent cotton.

[0023] Optionally, the pressing portion further includes: a rubber sleeve, and the rubber sleeve is fixedly mounted on the pressing plate.

[0024] By adopting the above technical solution, the rubber sleeve is used to improve the sealing between the pressing plate and the inner wall of the oil chamber.

[0025] In summary, this application has at least one of the following beneficial effects:

[0026] 1. Anti-fatigue components can maintain and service elastic parts to reduce fatigue loss of elastic parts, thereby extending the service life of elastic parts; and can improve the stability of torque transmitted by elastic parts.

[0027] 2. The phase-adhering sponge can absorb the lubricating oil from the oil outlet and continuously spread it to the entire phase-adhering sponge to be applied to the elastic part, thereby maintaining the elastic part.

[0028] 3. When the elastic member cannot be used, the connecting ring can be removed from the connecting hook to separate the elastic member from the sensor stator and the sensor mover, so that the elastic member can be replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a structural diagram according to an embodiment of the present application;

[0030] Figure 2 yes Figure 1 A schematic top view of

[0031] Figure 3 It is along Figure 2 A schematic cross-sectional view taken along the cutting line AA in FIG.

[0032] Figure 4 yes Figure 3 A schematic partial enlarged view of part B;

[0033] Figure 5 yes Figure 3 A schematic partial enlarged view of section C;

[0034] Figure 6 It is along Figure 2 A schematic cross-sectional view taken along the cutting line DD in FIG.

[0035] Figure 7 yes Figure 6 Schematic partial enlarged view of part E.

[0036] In the figure: 1. shaft seat; 2. sensor mover; 21. elastic member; 22. connecting hole; 23. limiting groove; 3. sensor stator; 31. connecting rod; 4. strain gauge; 5. smearing part; 51. sticking cotton; 52. metal column; 521. oil chamber; 522. oil outlet hole; 523. pressing hole; 6. control part; 61. mesh plate; 62. blocking rod; 63. blocking plate; 631. blocking hole; 64. reset spring; 65. sealing sleeve; 7. connecting assembly; 71. connecting plate; 72. connecting spring; 73. connecting hook; 74. connecting ring; 75. limiting block; 8. pressing part; 81. pressing rod; 82. pressing plate; 83. pressing spring; 84. rubber sleeve. DETAILED DESCRIPTION

[0037] The present application provides a signal device of a resistive force torque sensor.

[0038] See also Figure 1 A signal device for a resistive force-torque sensor includes a shaft base 1, a strain gauge 4, a sensor stator 3, and a sensor mover 2. Multiple elastic members 21 are disposed between the sensor mover 2 and the sensor stator 3. The shaft base 1 is fixedly connected to the sensor stator 3 via multiple connecting rods 31. The sensor mover 2 has mounting holes for connection to a mounting ring, to which a sleeve is fixedly attached. The sleeve fixing sleeve is equipped with a gear (the mounting ring, sleeve, and gear are not shown). When the sensor mover 2 rotates, the elastic member 21 deforms and transmits torque to the sensor stator 3.

[0039] See also Figure 1The strain gauge 4 is fixed to the sensor stator 3 and the connecting rod 31. When the sensor stator 3 and the connecting rod 31 are deformed, the strain gauge 4 also deforms. This deformation of the strain gauge produces a change in resistance. This tiny resistance change is converted into a voltage or current ratio by a measuring bridge. After signal amplification, it is converted into the component's strain value for display. In the embodiment of the present application, the elastic member 21 can be made of metal or a spring.

[0040] See also Figure 2 and Figure 3 Furthermore, an anti-fatigue component is provided on the elastic member 21, which can maintain the elastic member 21 to reduce the fatigue loss of the elastic member 21, thereby extending the service life of the elastic member 21; and can improve the stability of the torque transmitted by the elastic member 21.

[0041] See also Figure 4 and Figure 5 The anti-fatigue component includes: an application part 5, a control part 6 and a pressing part 8.

[0042] See also Figure 4 The smearing portion 5 includes: a sticky cotton 51 and a metal column 52. The metal column 52 is integrally formed and fixed on the elastic member 21, and an oil chamber 521 for storing lubricating oil is provided on the metal column 52. In the embodiment of the present application, the oil chamber 521 can not only store the lubricating oil, but also the oil chamber 521 can become a shrinkage pile during the deformation process, so that the elastic member 21 is not easy to expand outward, thereby reducing the fatigue loss of the elastic member 21; an oil outlet hole 522 is provided through the inner wall of the oil chamber 521. In the embodiment of the present application, an oil filling pipe (not shown in the figure) connected to the oil chamber 521 can also be provided to fill the oil chamber 521 with lubricating oil.

[0043] See also Figure 4 The sponge 51 is fixed between the elastic member 21 and the metal column 52. The sponge 51 can absorb the lubricating oil from the oil outlet 522 and continuously spread it to the entire sponge 51 to be applied to the elastic member 21, thereby maintaining the elastic member 21.

[0044] See also Figure 4 The control unit 6 includes a mesh plate 61, a blocking rod 62, a blocking plate 63, and a return spring 64. The mesh plate 61 is fixed in the oil outlet hole 522. The blocking plate 63 is disposed in the oil outlet hole 522 and is located on the side of the mesh plate 61 away from the oil chamber 521. A blocking hole 631 is formed through the blocking plate 63. One end of the blocking rod 62 is fixedly connected to the mesh plate 61, and the other end is disposed in the blocking hole 631. The blocking rod 62 is used to block and seal the blocking hole 631.

[0045] See also Figure 4The return spring 64 is fixed between the mesh plate 61 and the blocking plate 63. When the metal column 52 is deformed, the lubricating oil in the oil chamber 521 is squeezed into the oil outlet hole 522. The lubricating oil will squeeze the blocking plate 63 to make the blocking plate 63 move away from the mesh plate 61, that is, the blocking rod 62 is separated from the blocking hole 631, so that the lubricating oil can flow through the blocking hole 631 to the adjacent cotton 51, so that the adjacent cotton 51 can absorb the lubricating oil and apply it.

[0046] See also Figure 4 Furthermore, the control unit 6 also includes: a sealing sleeve 65, which is fixedly mounted on the peripheral wall of the blocking plate 63, and the sealing sleeve 65 is used to improve the sealing between the blocking plate 63 and the inner wall of the oil outlet hole 522; and the sealing sleeve 65 is also mounted on the blocking rod 62 according to the shape of the blocking rod 62 to improve the sealing between the blocking rod 62 and the inner wall of the blocking hole 631.

[0047] See also Figure 5 The pressing portion 8 includes a pressing rod 81, a pressing plate 82, and a pressing spring 83. A pressing hole 523 is defined in the top wall of the metal column 52, and the pressing plate 82 is disposed within the oil chamber 521. One end of the pressing rod 81 is disposed within the pressing hole 523, while the other end extends through the oil chamber 521 and is fixedly connected to the pressing plate 82.

[0048] See also Figure 5 The pressing spring 83 is sleeved on one end of the pressing rod 81 located in the pressing hole 523, and one end of the pressing spring 83 is fixed to the pressing rod 81 and the other end is fixed to the bottom of the pressing hole 523. The pressing spring 83 is used to reset the pressing rod 81; if the deformation force is not enough to squeeze the lubricating oil, the staff can press the pressing rod 81. At this time, the pressing plate 82 will squeeze the lubricating oil, thereby ensuring that the lubricating oil can flow to the adjacent cotton 51.

[0049] See also Figure 5 Furthermore, the pressing portion 8 also includes: a rubber sleeve 84, which is fixedly sleeved on the peripheral wall of the pressing plate 82, and the rubber sleeve 84 is used to improve the sealing between the pressing plate 82 and the inner wall of the oil chamber 521.

[0050] See also Figure 6 and Figure 7Furthermore, a connecting assembly 7 is provided between the elastic member 21 and both the sensor mover 2 and the sensor stator 3. The connecting assembly 7 includes a connecting plate 71 and a connecting spring 72. A connecting hole 22 is provided on the side of the sensor mover 2 and the sensor stator 3 near the elastic member 21. The connecting plate 71 is disposed within the connecting hole 22 and is connected to the elastic member 21. The connecting spring 72 is fixed between the side of the connecting plate 71 facing away from the elastic member 21 and the bottom of the connecting hole 22. When the elastic member 21 is subjected to a torque impact force, the connecting plate 71 can move within the connecting hole 22 and pull the connecting spring 72. That is, the connecting spring 72 can deform to absorb the torque impact force, thereby reducing fatigue loss of the elastic member 21.

[0051] See also Figure 7 Furthermore, the connecting component 7 also includes: a limit block 75, a limit groove 23 is opened on the inner wall of the connecting hole 22, the limit block 75 is slidably set in the limit groove 23 and slides along the length direction of the limit groove 23, the limit block 75 is fixedly connected to the connecting plate 71, and the limit block 75 can prevent the connecting plate 71 from completely sliding out of the connecting hole 22.

[0052] See also Figure 7 Furthermore, the connecting component 7 also includes: a connecting hook 73 and a connecting ring 74. The connecting hook 73 is fixed to the side of the connecting plate 71 away from the connecting spring 72; the connecting ring 74 is fixed to the side of the elastic member 21 close to the connecting plate 71, and the connecting ring 74 is hung on the connecting hook 73. After the elastic member 21 cannot be used, the connecting ring 74 can be removed from the connecting hook 73, and the elastic member 21 can be separated from the sensor stator 3 and the sensor mover 2, so that the elastic member 21 can be replaced.

[0053] The working principle of the signal device of a resistive force torque sensor of the present application when in use is as follows: the phase-adhering cotton 51 can absorb the lubricating oil discharged from the oil outlet 522, and continuously spread it to the entire phase-adhering cotton 51 to be applied to the elastic part 21, thereby maintaining the elastic part 21.

[0054] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A signal device of a resistive force torque sensor, characterized in that: include: A shaft seat (1), a strain gauge (4), a sensor stator (3) and a sensor mover (2); a plurality of elastic members (21) are provided between the sensor mover (2) and the sensor stator (3); the shaft seat (1) is fixed to the sensor stator (3) via a connecting rod (31); the strain gauge (4) is fixed to the sensor stator (3) and the connecting rod (31); and an anti-fatigue component is provided on the elastic member (21); The anti-fatigue component includes: an application part (5) and a control part (6); the application part (5) includes: a close-fitting sponge (51) and a metal column (52); the metal column (52) is fixed on the elastic part (21); the close-fitting sponge (51) is fixed between the elastic part (21) and the metal column (52); an oil cavity (521) is provided on the metal column (52); an oil outlet hole (522) is provided through the inner wall of the oil cavity (521); and the control part (6) is arranged in the oil outlet hole (522).

2. The signal device of the resistive force torque sensor according to claim 1, characterized in that: The control part (6) comprises: a mesh plate (61), a blocking rod (62), a blocking plate (63) and a return spring (64); the mesh plate (61) is fixed in the oil outlet hole (522); the blocking plate (63) is arranged in the oil outlet hole (522); and a blocking hole (631) is provided through the blocking plate (63); one end of the blocking rod (62) is fixed on the mesh plate (61) and the other end is arranged in the blocking hole (631); and the return spring (64) is fixed between the mesh plate (61) and the blocking plate (63).

3. The signal device of the resistive force torque sensor according to claim 1, characterized in that: A connecting assembly (7) is provided between the elastic member (21), the sensor stator (3) and the sensor mover (2), and the connecting assembly (7) comprises a connecting plate (71) and a connecting spring (72). A connecting hole (22) is provided on the sensor stator (3) and the sensor mover (2). The connecting plate (71) is provided in the connecting hole (22) and is fixedly connected to the elastic member (21). The connecting spring (72) is fixed between the connecting plate (71) and the bottom of the connecting hole (22).

4. The signal device of the resistive force torque sensor according to claim 3, characterized in that: The connecting assembly (7) further comprises: a connecting hook (73) and a connecting ring (74), wherein the connecting hook (73) is fixed on the connecting plate (71), the connecting ring (74) is fixed on the elastic member (21), and the connecting ring (74) is hung on the connecting hook (73).

5. The signal device of the resistive force torque sensor according to claim 2, characterized in that: The control unit (6) further comprises a sealing sleeve (65), wherein the sealing sleeve (65) is fixedly sleeved on the blocking plate (63).

6. The signal device of the resistive force torque sensor according to claim 3, characterized in that: The connecting assembly (7) further comprises a limiting block (75), a limiting groove (23) is provided on the inner wall of the connecting hole (22), the limiting block (75) is slidably arranged in the limiting groove (23), and the limiting block (75) is fixedly connected to the connecting plate (71).

7. The signal device of the resistive force torque sensor according to claim 2, characterized in that: The anti-fatigue component further includes: a pressing portion (8), the pressing portion (8) including: a pressing rod (81), a pressing plate (82) and a pressing spring (83), a pressing hole (523) is provided on the metal column (52), the pressing plate (82) is arranged in the oil chamber (521), one end of the pressing rod (81) is arranged in the pressing hole (523), and the other end is fixed to the pressing plate (82), the pressing spring (83) is sleeved on the pressing rod (81), one end is fixed to the pressing rod (81), and the other end is fixed to the bottom of the pressing hole (523).

8. The signal device of the resistive force torque sensor according to claim 7, characterized in that: The pressing portion (8) further comprises a rubber sleeve (84), wherein the rubber sleeve (84) is fixedly sleeved on the pressing plate (82).

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