Torque sensor

Abstract

The utility model discloses a torque sensor, and belongs to the technical field of sensors. The device mainly comprises a shell, an elastic body, a bearing, a flange base and flange plates, the elastic body is arranged in the shell, and the flange plates are arranged at two ends of the elastic body and used for connecting driving equipment and testing equipment. The nominal torque range of the torque sensor is 0.005 Nm to 20 Nm, the selectable precision grade reaches 0.1% of the full scale, the sensor with the torque smaller than or equal to 2 Nm is provided with a mechanical overload protection structure, the torque sensor has the advantages of being short in axial length, high in torsional rigidity, reliable, durable, easy and convenient to operate and install and the like, and a special version can be provided according to requirements.

Description

Technical Field

[0001] This application relates to the field of sensor technology, specifically a torque sensor. Background Technology

[0002] Torque sensors are used in research and development to measure the output torque values ​​of various engines, motors, etc., and their applications are very wide.

[0003] With the development of society and the increasing demands in all aspects, the accuracy requirements of torque sensors have also greatly increased. As a key device for measuring rotational torque, the accuracy of torque sensors directly affects the performance and reliability of the entire system. Usually, the accuracy of torque sensors is calibrated before leaving the factory. Pre-shipment calibration can ensure that the sensor meets the predetermined accuracy requirements during the manufacturing process, thereby providing accurate measurement data in practical applications.

[0004] In the field of industrial measurement, accurate torque measurement is crucial. However, existing torque sensors have some problems in practical applications, such as: some sensors have insufficient measurement accuracy and cannot meet the requirements of high-precision measurement; some sensors are easily damaged when encountering overload conditions and lack effective overload protection structures; some sensors have unreasonable structural designs, resulting in complex installation and long axial length, which is not convenient for use in space-constrained situations; in addition, some sensors have poor temperature adaptability and unstable measurement accuracy under different temperature environments.

[0005] Therefore, it is necessary to provide a torque sensor to solve the above problems.

[0006] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Summary of the Invention

[0007] Based on the aforementioned problems in the existing technology, the problem to be solved by this application is to provide a torque sensor that addresses the issues of insufficient accuracy, lack of overload protection, and complex installation in existing solutions.

[0008] The technical solution adopted by this application to solve its technical problem is: a torque sensor, comprising:

[0009] shell;

[0010] An elastomer disposed inside the housing;

[0011] A bearing, which is mounted at one end of the elastomer;

[0012] A flange base is installed at one end of the elastomer and connected to the housing;

[0013] An overload protection pin is installed between the housing and the elastomer;

[0014] A test base, which is mounted at the other end of the flange base;

[0015] M six-core square flange connector, which is installed on the outside of the housing.

[0016] Furthermore, the outer shell is made of aluminum alloy and is integrally formed. The bottom end of the outer shell is provided with bolt mounting holes, and the outer diameter of the bolt mounting holes is smaller than the outer diameter of the flange base flange.

[0017] Furthermore, one end of the elastomer is provided with the bearing, and the outer end of the bearing is fixed with a snap ring.

[0018] Furthermore, the flange base and the housing are connected by bolts and positioned by pins.

[0019] Furthermore, the overload protection pin is provided between the outer shell and the elastomer, and a fixing bolt mounting hole is provided between the outer shell and the overload protection pin.

[0020] Furthermore, a fixing bolt mounting hole is provided between the flange base and the elastomer.

[0021] Furthermore, the test base and the flange base are connected by bolts and positioned by pins.

[0022] Furthermore, a fixing bolt mounting hole is provided between the M six-core square flange socket and the outer shell.

[0023] Furthermore, a dustproof mechanism is fixedly provided on the outer casing, the dustproof mechanism comprising:

[0024] A housing, which is mounted on the outer shell at the position of the M six-core square flange insert;

[0025] A receiving slot is formed inside the housing, the size of which matches the size of the M six-core square flange insert.

[0026] A hole is provided at the upper end of the housing, and the size of the hole matches the size of the M six-core square flange insert.

[0027] A through hole is provided on one side of the housing;

[0028] A baffle is slidably disposed inside the through hole, and the size of the baffle matches the size of the hole.

[0029] A latch is installed at one end of the baffle;

[0030] A locking post, which is installed at one end of the housing;

[0031] A slot is provided on the buckle, and the size of the slot matches the size of the locking post.

[0032] Furthermore, the baffle is positioned directly above the hole, and a sealing ring is provided on the outer side of the baffle.

[0033] The beneficial effects of this application are as follows: The torque sensor provided by this application achieves a wide torque measurement range from 0.005 N·m to 20 N·m through reasonable structural design and parameter configuration, and can select high-precision measurement of 0.1% of full scale; it has a mechanical overload protection structure (when the torque is ≤2 N·m), which improves the durability of the sensor; it has a short axial length and high torsional stiffness, which facilitates installation and ensures stable measurement; the protection level reaches IP50, which is suitable for various working environments; the optional extended temperature range and calibration components meet different application scenarios and high-precision measurement requirements, and solve the problems existing in the prior art.

[0034] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0035] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0036] Figure 1 This is an overall schematic diagram of a torque sensor according to this application;

[0037] Figure 2 This is an exploded view of a torque sensor according to this application;

[0038] Figure 3 for Figure 1 A schematic diagram of A in the middle;

[0039] Figure 4 for Figure 1 A schematic diagram of the dust control mechanism;

[0040] Figure 5 for Figure 1 Explosion diagram of the central dust control mechanism;

[0041] Figure 6 for Figure 4 A schematic diagram of B in the middle;

[0042] The following are the labeling elements in the figure:

[0043] 1. Outer shell; 2. Elastomer; 3. Flange base; 4. Bearing; 5. Overload protection pin; 6. Test base; 7. M12 six-core square flange connector; 8. Dustproof mechanism; 80. Cover; 81. Receiving groove; 82. Hole; 84. Baffle; 85. Through hole; 86. Snap-fit; 87. Locking pin; 88. Slot. Detailed Implementation

[0044] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0045] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0046] like Figures 1-3 As shown, this application provides a torque sensor, which is mainly suitable for precision machinery and compact equipment. The sensor employs a centering boss and flange, with the flange and centering boss integrally machined to reduce connection gaps, improve overall rigidity, and achieve a compact structure. Its axial length is extremely short, reduced by 30%-50% compared to traditional sensors. The specific axial length varies within a certain range (e.g., 30mm-65mm) depending on the nominal torque, enabling compact installation. The high torsional stiffness design, through optimized shaft material (e.g., high-strength alloy) and cross-sectional shape, effectively reduces deformation during torque transmission and extends service life. The weighing sensor includes a housing 1, which is made of 6061 aluminum alloy and integrally machined to address the problems of long axial length, low torsional stiffness, and insufficient measurement accuracy in existing sensors.

[0047] Furthermore, an elastomer 2 is installed inside the outer casing 1. One end of the elastomer 2 is fitted with a flange base 3. Bolt mounting holes and pin positioning holes are located at the lower end of the outer casing 1. The outer diameter of the bolt mounting holes is slightly smaller than the outer diameter of the flange at the upper end of the flange base 3, ensuring a tight fit between the outer casing 1 and the flange base 3. A bearing 4 is added between the outer casing 1 and the elastomer 2, and the bearing is secured with a snap ring on its outer side. The cylindrical shaft of the elastomer 2 and the inner diameter of the bearing 4 must be tightly fitted, as must the inner diameter of the hole on the outer casing 1 and the outer diameter of the bearing 4, to prevent the elastomer 2 from being subjected to lateral and radial forces during testing, ensuring that it is only subjected to torque forces.

[0048] Meanwhile, an overload protection pin 5 is used to cross between the outer shell 1 and the elastomer 2. The overload protection pin 5 is fixed with screws to prevent it from falling off, thereby preventing the elastomer 2 from being overloaded in the torque direction. A test base 6 is connected to the rear end of the flange base 3 and fixed with screws and pins for positioning to facilitate testing.

[0049] An M12 six-pin square flange connector 7 is installed on the outer casing 1. It uses a 6-pin series connector. Pin 1 is connected to the positive (+) terminal of the excitation power supply, Pin 5 is connected to the negative (-) terminal of the excitation power supply, Pin 2 and Pin 4 are the positive and negative terminals of the signal, respectively, and Pin 3 is the shield wire.

[0050] To prevent dust from entering the interior of the M12 six-core square flange socket 7 when it is not in use, such as Figure 1 and Figures 4-6 As shown, a dustproof mechanism 8 is fixedly installed on the outer shell 1 at the position of the M12 six-core square flange insert 7. The dustproof mechanism 8 includes a cover 80 fixedly installed on the outer shell 1 at the position of the M12 six-core square flange insert 7, and a receiving groove 81 is provided inside the cover 80. The size of the receiving groove 81 matches the size of the M12 six-core square flange insert 7 so that the M12 six-core square flange insert 7 can be accommodated.

[0051] Meanwhile, a hole 82 is provided on the cover 80. The size of the hole 82 matches the size of the M12 six-core square flange insert 7 so that the external connecting device can pass through the hole 82 and connect to the M12 six-core square flange insert 7. In order to protect the M12 six-core square flange insert 7, a through hole 85 is provided on one side of the cover 80, and a baffle 84 is slidably provided in the through hole 85. It should be noted that the baffle 84 is located directly above the hole 82. A sealing ring (not shown in the figure) is provided around the baffle 84 and matches the size of the hole 82 so that when the M12 six-core square flange insert 7 is not in use, the hole 82 can be blocked by pushing the baffle 84, thereby preventing external dust from entering the M12 six-core square flange insert 7.

[0052] Furthermore, a buckle 86 is rotatably provided at one end of the baffle 84, and a locking post 87 is fixedly provided at the position of the cover 80 near the through hole 85. A slot 88 is provided on the buckle 86, and the size of the slot 88 matches the size of the locking post 87. It should be noted that when the baffle 84 completely blocks the hole 82, the buckle 86 and the locking post 87 can cooperate to lock the position of the baffle 84. Specifically, when the baffle 84 completely blocks the hole 82, the buckle 86 can be rotated to engage the slot 88 with the locking post 87 to lock the baffle 84. When unlocking is required, simply push the buckle 86 away from the locking post 87.

[0053] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A torque sensor, characterized in that: include: Outer shell (1); An elastomer (2) is disposed inside the outer casing (1); Bearing (3), which is mounted on one end of the elastomer (2); A flange base (4) is installed at one end of the elastomer (2) and connected to the outer shell (1); An overload protection pin (5) is installed between the housing (1) and the elastomer (2); Test base (6), which is mounted on the other end of the flange base (4); M12 six-core square flange connector (7), which is installed on the outside of the housing.

2. A torque sensor according to claim 1, characterized in that: The outer shell (1) is made of 6061 aluminum alloy and is integrally formed. The bottom end of the outer shell (1) is provided with bolt mounting holes. The outer diameter of the bolt mounting holes is smaller than the outer diameter of the flange base (4).

3. A torque sensor according to claim 1, characterized in that: The bearing (3) is provided at one end of the elastomer (2), and the outer end of the bearing (3) is fixed by a snap ring.

4. A torque sensor according to claim 1, characterized in that: The flange base (4) and the outer shell (1) are connected by bolts and positioned by pins.

5. A torque sensor according to claim 1, characterized in that: The overload protection pin (5) is provided between the outer shell (1) and the elastomer (2), and a fixing bolt mounting hole is provided between the outer shell (1) and the overload protection pin (5).

6. A torque sensor according to claim 1, characterized in that: A fixing bolt mounting hole is provided between the flange base (4) and the elastic body (2).

7. A torque sensor according to claim 1, characterized in that: The test base (6) and the flange base (4) are connected by bolts and positioned by pins.

8. A torque sensor according to claim 1, characterized in that: The M12 six-core square flange connector (7) is provided with a fixing bolt mounting hole between it and the outer shell (1).

9. A torque sensor according to claim 1, characterized in that: A dustproof mechanism (8) is fixedly provided on the outer shell (1), and the dustproof mechanism (8) includes: A housing (80) is mounted on the outer shell (1) at the position of the M12 six-core square flange insert (7); A receiving groove (81) is formed inside the housing (80), the size of which matches the size of the M12 six-core square flange insert (7); A hole (82) is provided at the upper end of the housing (80), the size of which matches the size of the M12 six-core square flange insert (7); A through hole (85) is provided on one side of the housing (80); A baffle (84) is slidably disposed inside the through hole (85), the size of the baffle (84) matching the size of the hole (82); A latch (86) is mounted on one end of the baffle (84); A locking post (87) is mounted at one end of the housing (80); A slot (88) is formed on the buckle (86), the size of which matches the size of the locking post (87).

10. A torque sensor according to claim 9, characterized in that: The baffle (84) is positioned directly above the hole (82), and a sealing ring is provided on the outer side of the baffle (84).

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