A torsion and pressure dual sensor and its assembling method

Abstract

The application relates to the technical field of sensors, in particular to a torsion and pressure dual-purpose sensor and an assembling method thereof. A connecting shaft is arranged inside a first shell along the axial direction of the first shell. A strain bridge is fixedly arranged on the outer wall of the connecting shaft. One end of a load shaft is embeddedly connected with the connecting shaft and is engaged with the connecting shaft through the tooth pattern of the load shaft end. A limiting sleeve ring is arranged on the end of the load shaft close to the connecting shaft. A first pressure sensing assembly for detecting the pressure of the limiting sleeve ring is arranged on the outer wall of the load shaft away from the connecting shaft. The first pressure sensing assembly and a second pressure sensing assembly facilitate effective detection of the longitudinal pressure at multiple positions in the sensor. The strain bridge is electrically connected with the outside through a slip ring structure, facilitating detection of the torsion received by the connecting shaft during rotation, facilitating simultaneous torsion and pressure detection of the sensor, and improving the application scenarios of the sensor.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sensors, in particular to a torsion and pressure dual-purpose sensor and an assembling method thereof. BACKGROUND

[0002] A sensor is a detection device that can sense the information of a measured quantity and convert the sensed information into an electrical signal or other required form of information output according to a certain rule, to meet the requirements of information transmission and processing.

[0003] The current sensor can only measure torsion or axial pressure, and other external devices need to be added when synchronous measurement of torsion or axial pressure is required, resulting in excessive cost investment of the sensor. In addition, the current sensor is not easy to assemble and install, and has a large error in actual use, which is not convenient for actual use of the sensor.

[0004] In view of the problems exposed in the use of the current sensor, it is necessary to optimize and improve the current sensor. SUMMARY

[0005] To solve the above technical problems, the present application provides a torsion and pressure dual-purpose sensor and an assembling method thereof, which has the characteristics of facilitating the sensor to detect torsion and pressure simultaneously.

[0006] To achieve the above purpose, the present application provides the following technical scheme: a torsion and pressure dual-purpose sensor, comprising a first shell and a sealing end cover fixedly arranged at both ends of the first shell, a coupling shaft arranged inside the first shell along the axial direction of the first shell, a strain bridge fixedly arranged on the outer wall of the coupling shaft, a second input ring arranged on the outer wall of the coupling shaft on both sides of the strain bridge, a first input ring arranged on the outer side of each of the two second input rings, a first output ring fixedly arranged on the inner wall of the first shell and matched with the outer wall of the second input ring, and a second output ring arranged on the inner wall of the first shell and matched with the outer wall of the first input ring.

[0007] A load shaft is arranged through one of the sealing end covers, one end of the load shaft is embeddedly connected with the coupling shaft and engaged with the coupling shaft through the thread on the end of the load shaft, a limiting sleeve ring is arranged on the end of the load shaft close to the coupling shaft, a first pressure sensing assembly for detecting the pressure of the limiting sleeve ring is arranged on the outer wall of the load shaft away from the coupling shaft, a second pressure sensing assembly is arranged on the end of the coupling shaft away from the load shaft and inside the first shell, and the second pressure sensing assembly is attached to the end of the coupling shaft and detects the pressure of the coupling shaft.

[0008] As a preferred technical scheme of the torsion and pressure dual-purpose sensor, the side wall of the first input ring towards the second output ring and the side wall of the second input ring towards the first output ring are uniformly provided with receiving grooves, and elastic sheets are embedded in the receiving grooves.

[0009] As a preferred technical scheme of the torsion and pressure dual-purpose sensor, the diameters of the first input ring and the second input ring are sequentially reduced along the direction towards the second pressure sensing assembly.

[0010] As a preferred technical scheme of the torsion and pressure dual-purpose sensor, a reinforcing ring is filled between the first output ring and the second output ring, and a structural reinforcing ring is arranged on the side wall of the first input ring and the second input ring away from the second pressure sensing assembly.

[0011] As a preferred technical scheme of the torsion and pressure dual-purpose sensor, the first pressure sensing assembly comprises a base and an end seat arranged in close contact with the base, a through groove is uniformly arranged in the end seat, a pressure transmission column is embedded in the through groove, a ball is arranged on the side of the pressure transmission column inside the through groove towards the limiting sleeve, a pressure detection sheet is sealingly arranged on the side of the pressure transmission column inside the through groove away from the ball, and conductive oil is sealingly filled between the pressure detection sheet and the pressure transmission column.

[0012] As a preferred technical scheme of the torsion and pressure dual-purpose sensor, a rubber ring is uniformly arranged on the outer wall of the pressure transmission column, and the end of the pressure transmission column towards the ball is in a spherical surface structure.

[0013] As a preferred technical scheme of the torsion and pressure dual-purpose sensor, the first pressure sensing assembly further comprises a support pad, a pressure spring and a connecting seat, the support pad is arranged on the side wall of the base away from the end seat, the pressure spring is uniformly arranged in the support pad, the connecting seat is arranged on the side wall of the support pad away from the base, and the connecting seat is embedded in the sealing end cover.

[0014] As a preferred technical scheme of the torsion and pressure dual-purpose sensor, the second pressure sensing assembly is identical in structure to the first pressure sensing assembly, and the second pressure sensing assembly and the first pressure sensing assembly are symmetrically arranged.

[0015] As a preferred technical scheme of the torsion and pressure dual-purpose sensor, an outer shell is arranged on the outer wall of the first shell, a power supply is uniformly arranged in the inner part of the outer shell, and an auxiliary end cover is fixedly arranged on one end of the outer shell through screwing.

[0016] As a preferred technical scheme of the assembling method of the torsion and pressure dual-purpose sensor, the load shaft is connected with any sealing end cover through interference fit, so that one end of the load shaft reaches the inner part of the first shell.

[0017] The first pressure sensing assembly is sleeved on the outer wall of the load shaft at the end of the coupling shaft, and the limiting sleeve is sleeved on the end of the load shaft through interference fit, so that the two ends of the first pressure sensing assembly are in contact with the sealing end cover and the side wall of the limiting sleeve respectively;

[0018] The strain bridge is bonded on the side wall of the coupling shaft, the first input ring and the second input ring are sleeved on the side wall of the load shaft and located on both sides of the strain bridge, the input end of the strain bridge is connected with the first input ring, and the output end of the strain bridge is connected with the second input ring;

[0019] The coupling shaft with the first input ring and the second input ring is inserted into the first shell, so that the first input ring is in contact with the second output ring, and the second input ring is in contact with the first output ring;

[0020] The sealing end cover with the load shaft is connected with the first shell, one end of the load shaft is embeddedly connected with the coupling shaft, the load shaft and the coupling shaft are connected through the tooth meshing, the load shaft pushes the coupling shaft to further displace towards the other end of the first shell, so that the other end of the coupling shaft is in contact with the second pressure sensing assembly.

[0021] Compared with the prior art, the beneficial effects of the present application are:

[0022] 1、The first pressure sensing assembly and the second pressure sensing assembly are additionally arranged in the torsion and pressure dual-purpose sensor, the first pressure sensing assembly is used for detecting the longitudinal pressure generated in the rotation process of the load shaft, the second pressure sensing assembly is used for detecting the longitudinal pressure generated in the rotation process of the coupling shaft, the longitudinal pressure at multiple positions in the sensor is conveniently and effectively detected, the strain bridge is additionally arranged on the side wall of the coupling shaft, the strain bridge is electrically connected with the outside through the slip ring structure, the torsion received by the coupling shaft in the rotation process is conveniently detected, the sensor can simultaneously detect the torsion and the pressure, and the application scene of the sensor is improved.

[0023] 2、The elastic sheets are additionally arranged on the inner walls of the first output ring and the second output ring, the contact effect of the first input ring and the second input ring is further improved through the elastic force of the elastic sheets, the contact part is prevented from being disconnected due to continuous friction in the rotation process of the coupling shaft, and the data stability of the torsion detection is further improved.

[0024] 3、The first pressure sensing assembly and the second pressure sensing assembly are additionally arranged in the sensor, the ball in the first pressure sensing assembly is used for receiving the pressure and transmitting the pressure to the pressure transmission column and the conductive oil, the pressure data is obtained through the pressure detection sheet, and the spherical structure of the ball in the pressure sensing assembly is convenient for reducing the friction influence caused by the rotation of the load shaft, and more stable sensor data is conveniently obtained. BRIEF DESCRIPTION OF DRAWINGS

[0025] For the purpose of making the content of the present application more easily and clearly understood, the present application will be further described in detail below according to specific embodiments and in conjunction with the accompanying drawings.

[0026] Figure 1 is a structural schematic diagram of the present application;

[0027] Figure 2 is a structural schematic diagram of the internal section of the present application;

[0028] Figure 3 is a structural schematic diagram of the internal section of the present application along the A-A line; Figure 2

[0029] Figure 4 is a structural schematic diagram of the internal section of the first pressure sensing assembly in the present application;

[0030] In the figure: 1, first housing; 2, sealing end cover; 3, outer housing; 4, auxiliary end cover; 5, load shaft; 6, limiting collar; 7, first pressure sensing assembly; 71, base; 72, end seat; 73, through slot; 74, pressure detection sheet; 75, pressure transmission column; 76, ball; 77, support pad; 78, pressure spring; 79, connecting seat; 8, power supply; 9, coupling shaft; 10, strain bridge; 11, first input ring; 12, second input ring; 13, first output ring; 14, second output ring; 15, second pressure sensing assembly; 16, receiving groove; 17, elastic sheet. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those of ordinary skill in the art without any creative work, fall within the protection scope of the present application.

[0032] EMBODIMENT

[0033] As Figures 1-4 ​As shown, the torsion and pressure dual-purpose sensor comprises a first shell 1 and a sealing end cover 2 fixed at both ends of the first shell 1, a through hole is further provided in the coaxial position of the sealing end cover 2 and the first shell 1, which is convenient for the screw rod to pass through, and the first shell 1 and the sealing end cover 2 are tightly connected by the screwing and locking of the thread and the screw rod, so as to seal the inside of the sensor. A connecting shaft 9 is arranged in the inside of the first shell 1 along the axial direction of the first shell 1, a strain bridge 10 is fixedly arranged on the outer wall of the connecting shaft 9, a second input ring 12 is arranged on the outer wall of the connecting shaft 9 on both sides of the strain bridge 10, a first input ring 11 is arranged on the outer side of the two second input rings 12, a first output ring 13 matched with the outer wall of the second input ring 12 is fixedly arranged on the inner wall of the first shell 1, and a second output ring 14 matched with the outer wall of the first input ring 11 is arranged on the inner wall of the first shell 1.

[0034] A load shaft 5 is arranged in the sealing end cover 2, one end of the load shaft 5 is embeddedly connected with the connecting shaft 9, and the load shaft 5 is engaged with the connecting shaft 9 through the teeth on the end of the load shaft 5. A limiting sleeve ring 6 is arranged on the end of the load shaft 5 close to the connecting shaft 9, a first pressure sensing assembly 7 for detecting the pressure of the limiting sleeve ring 6 is arranged on the outer wall of the load shaft 5 away from the connecting shaft 9, and a second pressure sensing assembly 15 is arranged on the end of the connecting shaft 9 away from the load shaft 5 in the inside of the first shell 1. The second pressure sensing assembly 15 is attached to the end of the connecting shaft 9 and detects the pressure of the connecting shaft 9.

[0035] The outer wall of the other sealing end cover 2 is provided with a servo motor, the output shaft of the servo motor penetrates the sealing end cover 2, extends into the first shell 1 and is engagedly connected with the connecting shaft 9 to drive the connecting shaft 9.

[0036] Specifically, the side wall of the first input ring 11 facing the second output ring 14 and the side wall of the second input ring 12 facing the first output ring 13 are uniformly provided with receiving grooves 16, and elastic sheets 17 are embedded in the receiving grooves 16. In the embodiment, the outer arc surface of the elastic sheet 17 faces the first input ring 11 and the second input ring 12, which further improves the stability of the electric signal transmission when the side walls of the first output ring 13 and the second output ring 14 are worn.

[0037] Specifically, the diameters of the first input ring 11 and the second input ring 12 gradually decrease along the direction towards the second pressure sensing assembly 15. In the embodiment, this structure is more convenient for the installation and disassembly of the various components in the sensor.

[0038] Specifically, the first output ring 13 and the second output ring 14 are filled with a reinforcing ring, the side wall of the first input ring 11 and the second input ring 12 away from the second pressure sensing assembly 15 is provided with a structural reinforcing ring, and the reinforcing ring is used to improve the structural stability of the first output ring 13 and the second output ring 14 in the embodiment, and the structural reinforcing ring is used for positioning during component installation and can further keep the first input ring 11, the second input ring 12, the first output ring 13 and the second output ring 14 in the appropriate positions respectively.

[0039] Specifically, the first pressure sensing assembly 7 includes a base 71 and an end seat 72 arranged in close contact with the base 71, a through groove 73 is uniformly arranged in the end seat 72, a pressure transmission column 75 is arranged in the through groove 73, a ball 76 is arranged on one side of the pressure transmission column 75 inside the through groove 73, a pressure detection sheet 74 is sealingly arranged on the side of the pressure transmission column 75 away from the ball 76, and conductive oil is sealingly filled between the pressure detection sheet 74 and the pressure transmission column 75. In the embodiment, the ball 76 is in contact with the limiting sleeve 6, and the pressure is transmitted to the ball 76 during the rotation of the limiting sleeve 6, and then transmitted to the pressure transmission column 75 through the ball 76, and the conductive oil is pressurized through the pressure transmission column 75, and the pressure detection sheet 74 receives the pressure from the conductive oil and detects the pressure condition.

[0040] Specifically, the outer wall of the pressure transmission column 75 is uniformly provided with a rubber ring, and one end of the pressure transmission column 75 towards the ball 76 is a spherical surface structure. In the embodiment, the spherical surface structure can keep point-to-point contact with the ball 76, further reducing wear and tear and improving detection accuracy.

[0041] Specifically, the first pressure sensing assembly 7 further includes a support pad 77, a pressure spring 78 and a connecting seat 79, the support pad 77 is arranged on the side wall of the base 71 away from the end seat 72, the pressure spring 78 is uniformly arranged in the inside of the support pad 77, and the connecting seat 79 is arranged on the side wall of the support pad 77 away from the base 71 and can be embedded in the sealing end cover 2. In the embodiment, the support pad 77 and the pressure spring 78 are auxiliary components, which can be used by the staff according to the actual situation. The support pad 77 and the pressure spring 78 can reduce the stress of the first pressure sensing assembly 7 and avoid damage to the first pressure sensing assembly 7 due to excessive stress when the load shaft 5 is overloaded.

[0042] Specifically, the second pressure sensing assembly 15 is the same as the first pressure sensing assembly 7 in structure, and the second pressure sensing assembly 15 is symmetrically arranged with the first pressure sensing assembly 7. In the embodiment, the side surface of the second pressure sensing assembly 15 can also be provided with a support pad 77 and a pressure spring 78, and the second pressure sensing assembly 15 is installed in another position of the first housing 1, which is convenient for detecting the pressure condition of the connecting shaft 9.

[0043] Specifically, the outer wall of the first shell 1 is sleeved with an outer shell 3, the inner part of the outer shell 3 is uniformly arranged with a power supply 8, one end of the outer shell 3 is fixedly provided with an auxiliary end cover 4 through threaded rotation, and the power supply 8 in the embodiment can supply power to each power component in the first shell 1, so that each power component can operate well.

[0044] The working principle and use process of the application are as follows: when the application is installed, the load shaft 5 is connected with any sealing end cover 2 through interference fit, so that one end of the load shaft 5 reaches the inside of the first shell 1.

[0045] The first pressure sensing assembly 7 is sleeved on the outer wall of the end of the load shaft 5 towards the coupling shaft 9, and the limiting sleeve ring 6 is sleeved on the end of the load shaft 5 through interference fit, so that the two ends of the first pressure sensing assembly 7 are in contact with the side wall of the sealing end cover 2 and the limiting sleeve ring 6 respectively.

[0046] The strain bridge 10 is bonded on the side wall of the coupling shaft 9, the first input ring 11 and the second input ring 12 are sleeved on the side wall of the load shaft 5 and located on the two sides of the strain bridge 10, the input end of the strain bridge 10 is connected with the first input ring 11, and the output end of the strain bridge 10 is connected with the second input ring 12.

[0047] The coupling shaft 9 with the first input ring 11 and the second input ring 12 is inserted into the first shell 1, so that the first input ring 11 is in contact with the second output ring 14, and the second input ring 12 is in contact with the first output ring 13.

[0048] The sealing end cover 2 with the load shaft 5 is connected with the first shell 1, one end of the load shaft 5 is embeddedly connected with the coupling shaft 9, and the load shaft 5 and the coupling shaft 9 are connected through tooth meshing, the load shaft 5 drives the coupling shaft 9 to further displace towards the other end of the first shell 1, so that the other end of the coupling shaft 9 is in contact with the second pressure sensing assembly 15.

[0049] The other sealing end cover 2 is provided with a servo motor on the outer wall, the output shaft of the servo motor penetrates the sealing end cover 2, extends into the first shell 1 and is meshingly connected with the coupling shaft 9, drives the coupling shaft 9, and drives the load shaft 5 during the rotation of the coupling shaft 9.

[0050] The coupling shaft 9 in the sensor is a split structure with the load shaft 5, a strain bridge 10 is fixedly arranged on the outer wall of the coupling shaft 9, two groups of first input rings 11 and second input rings 12 are arranged on the two sides of the strain bridge 10, the input end of the strain bridge 10 is connected with the first input ring 11, the output end of the strain bridge 10 is connected with the second input ring 12, the first input ring 11 is in contact with the second output ring 14, the second input ring 12 is in contact with the first output ring 13, so that the strain bridge 10 is kept in electrical connection with the outside world, the receiving grooves 16 are arranged in the first output ring 13 and the second output ring 14, and the elastic sheets 17 are arranged in the receiving grooves 16, so as to further improve the electrical signal transmission stability of the contact area;

[0051] The first pressure sensing assembly 7 arranged on the side wall of the load shaft 5 can detect the pressure of the limiting sleeve ring 6 during the rotation of the load shaft 5, so as to determine the load condition of the load shaft 5 during the operation;

[0052] The second pressure sensing assembly 15 is arranged on the end of the coupling shaft 9 different from the load shaft 5, and can detect the pressure of the coupling shaft 9 during the rotation of the coupling shaft 9, so as to determine the pressure load condition of the end of the coupling shaft 9.

[0053] The above is only the preferred scheme of the present application, and is not as a further limitation of the present application, and various equivalent changes made by using the content of the specification and drawings of the present application are within the protection scope of the present application.

Claims

1. A torsion-compression dual sensor, characterized in that, The utility model provides a kind of sealing end cover (2) and first shell (1) including first shell (1), the sealing end cover (2) is fixedly arranged in the both ends of first shell (1), be provided with coupling shaft (9) along the axial direction of first shell (1) in the inside of first shell (1), the outer wall of coupling shaft (9) is fixedly provided with strain bridge (10), the both sides of strain bridge (10) are provided with second input ring (12) in the outer wall of coupling shaft (9), the outer side of two second input ring (12) is equipped with first input ring (11), the inner wall of first shell (1) is fixedly provided with the first output ring (13) with the outer wall cooperation of second input ring (12), the inner wall of first shell (1) is provided with the second output ring (14) with the outer wall cooperation of first input ring (11); One of the sealing end cover (2) is provided with load shaft (5), one end of the load shaft (5) is embeddedly connected with the coupling shaft (9), and the load shaft (5) is engaged with the coupling shaft (9) through the thread on the end of the load shaft (5), the end of the load shaft (5) close to the coupling shaft (9) is sleeved with a limiting sleeve ring (6), the side of the load shaft (5) away from the coupling shaft (9) is sleeved with a first pressure sensing assembly (7) for detecting the pressure of the limiting sleeve ring (6) on the outer wall of the load shaft (5), the end of the coupling shaft (9) away from the load shaft (5) is provided with a second pressure sensing assembly (15) in the inside of the first shell (1), the second pressure sensing assembly (15) is attached to the end of the coupling shaft (9) and detects the pressure of the coupling shaft (9); The first pressure sensing assembly (7) comprises a base (71) and an end seat (72) attached to the base (71), a through slot (73) is uniformly provided in the end seat (72), a pressure transmission column (75) is embedded in the inside of the through slot (73), a ball (76) is provided on the side of the pressure transmission column (75) facing the limiting sleeve ring (6) in the inside of the through slot (73), a pressure detection sheet (74) is sealingly provided on the side of the pressure transmission column (75) away from the ball (76) in the inside of the through slot (73), and conductive oil is sealingly filled between the pressure detection sheet (74) and the pressure transmission column (75); The outer wall of the pressure transmission column (75) is uniformly sleeved with a rubber ring, and the end of the pressure transmission column (75) facing the ball (76) is in spherical surface structure; The first pressure sensing assembly (7) further comprises a supporting pad (77), a pressure spring (78) and a connecting seat (79), the supporting pad (77) is provided on the side wall of the base (71) away from the end seat (72), the pressure spring (78) is uniformly provided in the inside of the supporting pad (77), and the connecting seat (79) is provided on the side wall of the supporting pad (77) away from the base (71), and the connecting seat (79) can be embedded in the sealing end cover (2).

2. The torsion and pressure dual sensor according to claim 1, wherein: The side wall of the first input ring (11) facing the second output ring (14) and the side wall of the second input ring (12) facing the first output ring (13) are uniformly provided with a receiving groove (16), and an elastic sheet (17) is embedded in the inside of the receiving groove (16).

3. The torsion and pressure dual sensor of claim 1, wherein: The diameters of the first input ring (11) and the second input ring (12) are successively reduced along the direction towards the second pressure sensing assembly (15).

4. The torsion and pressure dual sensor of claim 1, wherein: A reinforcing ring is filled between the first output ring (13) and the second output ring (14), and a structural reinforcing ring is arranged on the side wall of the first input ring (11) and the second input ring (12) away from the second pressure sensing assembly (15).

5. The torsion and pressure dual sensor of claim 1, wherein: The second pressure sensing assembly (15) is identical in structure to the first pressure sensing assembly (7), and the second pressure sensing assembly (15) is symmetrically arranged with the first pressure sensing assembly (7).

6. The torsion and pressure dual sensor of claim 1, wherein: An outer shell (3) is sleeved on the outer wall of the first shell (1), the inside of the outer shell (3) is uniformly arranged with a power supply (8), and one end of the outer shell (3) is fixedly provided with an auxiliary end cover (4) through threaded engagement.

7. An assembly method for a dual-purpose torsion and compression sensor, characterized in that: The method for assembling the torsion and pressure dual-purpose sensor of claim 1 comprises the following steps: The load shaft (5) is connected with any one of the sealing end covers (2) through interference fit, so that one end of the load shaft (5) reaches the inside of the first shell (1); The first pressure sensing assembly (7) is sleeved on the outer wall of one end of the load shaft (5) towards the coupling shaft (9), and the limiting sleeve ring (6) is sleeved on the end of the load shaft (5) through interference fit, so that the two ends of the first pressure sensing assembly (7) are in contact with the side wall of the sealing end cover (2) and the limiting sleeve ring (6) respectively; The strain bridge (10) is bonded on the side wall of the coupling shaft (9), the first input ring (11) and the second input ring (12) are sleeved on the side wall of the load shaft (5) and located on both sides of the strain bridge (10), the input end of the strain bridge (10) is connected with the first input ring (11), and the output end of the strain bridge (10) is connected with the second input ring (12); The coupling shaft (9) with the first input ring (11) and the second input ring (12) is inserted into the first shell (1), so that the first input ring (11) is in contact with the second output ring (14), and the second input ring (12) is in contact with the first output ring (13); The sealing end cover (2) with the load shaft (5) is connected with the first shell (1), one end of the load shaft (5) is embeddedly connected with the coupling shaft (9), the load shaft (5) and the coupling shaft (9) are connected through tooth engagement, the load shaft (5) pushes the coupling shaft (9) to further displace towards the other end of the first shell (1), so that the other end of the coupling shaft (9) is in contact with the second pressure sensing assembly (15).

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