Strain type torque sensor

Abstract

The utility model discloses a strain type torque sensor, which comprises a torque sensor main body, an installation shell is arranged on the torque sensor main body in a penetrating manner, two sealing bearings are fixedly connected in the installation shell, the two sealing bearings are provided with the same middle shaft, and two sides of the installation shell are provided with reinforcing mechanisms; the utility model relates to the technical field of power-assisted bicycles. According to the strain type torque sensor, the connection strength of the center shaft and the mounting shell can be improved through the arranged reinforcing mechanism, the bearing capacity of the center shaft when the center shaft is subjected to transverse or vertical acting force can be improved, therefore, position deviation between the center shaft and the torque sensor body is avoided, and the working stability of the torque sensor body is improved; and moreover, the reinforcing mechanism is connected with the middle shaft by adopting a split structure, so that the disassembly and assembly mode is simple, and later overhaul and maintenance are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of power-assisted bicycles, in particular to a strain-type torque sensor. Background Art

[0002] As people's awareness of environmental protection and health gradually increases, bicycles have re-entered the public's field of vision as an environmentally friendly and convenient short-distance transportation tool, and have become a unique landscape that can be seen everywhere in the city. In recent years, compared with traditional bicycles, electric-assisted bicycles have won the favor of more and more people in the bicycle field for their labor-saving and energy-saving characteristics.

[0003] The publication number CN 217348062 U discloses a torque sensor for power-assisted bicycles. The practical new technical solution is: including a housing with a sleeve that can pass through a standard five-way pipe, a middle shaft that can be installed on an ordinary bicycle crank, a five-claw chuck connected to the sprocket, a torque ring fixed on the middle shaft flange, a slip ring for transmitting signals, a bearing supporting the middle shaft, and an external waterproof dust cover. The torque ring includes an inner ring and an outer ring. A magnet is installed on the outer circle of the inner ring of the torque ring. A Hall sensing element is installed at the corresponding position of the outer ring of the torque ring. Under the action of torque, the inner ring of the torque ring produces a relative displacement relative to the outer ring of the torque ring, and the magnet also produces a displacement relative to the Hall element. The practical new solution provided by the practical new solution has high system integration, is simple to install and use, has fast system response, high sensitivity, good riding experience, and controllable system cost.

[0004] However, the device has the following shortcomings: when in use, the device can use a torque sensor to detect the pedaling torque of the power-assisted bicycle, but the overall structure of the device is connected in an assembled manner, and the connection strength between the shaft and the shell is low. When the middle shaft is subjected to a strong impact force during riding, it is easy to deviate from the shell, causing the middle shaft to tilt, affecting the normal data collection of the torque sensor, and limiting the use effect.

[0005] Therefore, the utility model provides a strain type torque sensor to solve the above problems. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides a strain type torque sensor to solve the above problems.

[0007] To achieve the above objectives, the utility model is implemented through the following technical solutions: a strain type torque sensor, comprising a torque sensor body, a mounting shell is provided through the torque sensor body, two sealed bearings are fixedly connected in the mounting shell, the two sealed bearings are provided with the same central axis, and reinforcement mechanisms are provided on both sides of the mounting shell;

[0008] The reinforcing mechanism includes two reinforcing blocks arranged outside the central axis, and the inner walls of the two reinforcing blocks are each provided with a rotation groove. The outer wall fixed sleeve of the central axis is provided with a fixing ring, and the two sides of the fixing ring respectively slide and extend into the corresponding rotation grooves. A plurality of limiting balls are movably embedded on the fixing ring, and one side of the limiting ball contacts the inner wall of the rotation groove.

[0009] Preferably, the central axis includes an extension section, connecting sections are provided on both sides of the extension section, and an insertion interface is provided at one end of the connecting section.

[0010] Preferably, an arc-shaped stopper is fixedly connected to one side of the reinforcement block, and the outer wall fixed sleeve of the extension section is provided with two dust-proof sleeves, which are respectively located in the corresponding arc-shaped stoppers. The arc-shaped stoppers arranged on one side of the two reinforcement blocks can be assembled into a circular ring, so that they can be matched with the dust-proof sleeves installed on the central axis to prevent foreign matter from entering the interior of the reinforcement block and prevent the interior from being damaged and affecting the rotation of the central axis.

[0011] Preferably, multiple screw grooves are provided on both sides of the mounting shell, and the outer wall of the reinforcement block is fixedly connected to a mounting sleeve, and multiple fastening bolts are connected through threads on the mounting sleeve, and the multiple fastening bolts are equidistantly distributed, and one end of the fastening bolt thread extends into the corresponding screw groove. By using the provided screw groove, mounting sleeve and fastening bolt in combination, the mounting shell and the reinforcement block can be conveniently fastened together, which is convenient for installation and use.

[0012] Preferably, a positioning groove is provided on one side of the four reinforcement blocks, and a positioning rod is fixedly connected to one side of the four reinforcement blocks. One end of the positioning rod slides and extends into the corresponding positioning groove. The positioning groove and the positioning rod are used in combination to facilitate the positioning of the reinforcement blocks and to press them together, making installation and use easier.

[0013] Preferably, the arc-shaped stopper is made of aluminum alloy, and the dust cover is made of aluminum alloy. By providing the arc-shaped stopper and the dust cover made of aluminum alloy, their strength can be improved to avoid deformation after impact.

[0014] Beneficial Effects

[0015] The utility model provides a strain-type torque sensor. Compared with the prior art, it has the following beneficial effects:

[0016] (1) The strain-type torque sensor can improve the connection strength between the central axis and the mounting shell by means of a reinforcement mechanism, and can improve the load-bearing capacity of the central axis when subjected to lateral or vertical forces, thereby avoiding positional deviation between the central axis and the torque sensor body, thereby improving the working stability of the torque sensor body and making the detection data more accurate. In addition, the reinforcement mechanism adopts a split structure to be connected to the central axis, and the disassembly and assembly method is simple, which is conducive to later inspection and maintenance.

[0017] (2) The strain-type torque sensor can be assembled into a circular ring by means of arc-shaped blocks arranged on one side of the two reinforcement blocks, so that it can be used in conjunction with the dust cover installed on the central axis to prevent foreign matter from entering the interior of the reinforcement block and preventing the interior from being damaged and affecting the rotation of the central axis. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the external structure of the utility model;

[0019] Figure 2 It is a partial front view cross-sectional structural schematic diagram of the utility model;

[0020] Figure 3 It is a schematic diagram of the relevant decomposition structure of the strengthening mechanism in the utility model;

[0021] Figure 4 It is an external assembly diagram of the central axis in the utility model.

[0022] In the figure: 1. Torque sensor body; 2. Mounting shell; 3. Sealed bearing; 4. Central axis; 41. Extension section; 42. Connecting section; 43. Plug interface; 5. Reinforcement block; 6. Rotation groove; 7. Fixing ring; 8. Ball; 9. Arc stopper; 10. Dust cover; 11. Screw groove; 12. Mounting sleeve; 13. Fastening bolt; 14. Positioning groove; 15. Positioning rod. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Embodiment 1:

[0025] See also Figures 1 to 4A strain type torque sensor comprises a torque sensor body 1, wherein a strain type torque sensor is used inside the sensor body, which is an existing mature technology. A mounting shell 2 is provided through the torque sensor body 1, two sealed bearings 3 are fixedly connected in the mounting shell 2, and the same central axis 4 is provided on the two sealed bearings 3, and reinforcement mechanisms are provided on both sides of the mounting shell 2;

[0026] The reinforcing mechanism includes two reinforcing blocks 5 arranged outside the central axis 4. The two reinforcing blocks 5 can be spliced ​​together to form a ring. The inner walls of the two reinforcing blocks 5 are each provided with a rotation groove 6. The outer wall of the central axis 4 is fixedly sleeved with a fixing ring 7. Both sides of the fixing ring 7 slide and extend into the corresponding rotation groove 6 respectively. A plurality of limiting balls 8 are movably embedded on the fixing ring 7. One side of the limiting ball 8 contacts the inner wall of the rotation groove 6.

[0027] The central axis 4 includes an extension section 41 . Both sides of the extension section 41 are provided with connection sections 42 . An insertion port 43 is provided at one end of the connection section 42 .

[0028] Embodiment 2:

[0029] See also Figures 1 to 4 , this embodiment provides a technical solution based on the first embodiment: an arc-shaped stopper 9 is fixedly connected to one side of the reinforcement block 5, and two arc-shaped stoppers 9 are spliced ​​to form a circular ring. The outer wall of the extension section 41 is fixedly sleeved with two dust-proof sleeves 10, and the two dust-proof sleeves 10 are respectively located in the corresponding arc-shaped stopper 9; a plurality of screw grooves 11 are provided on both sides of the mounting shell 2, and a mounting sleeve 12 is fixedly connected to the outer wall of the reinforcement block 5, and a plurality of fastening bolts 13 are threadedly connected to the mounting sleeve 12, and the plurality of fastening bolts 13 are equidistantly distributed, and one end of the fastening bolt 13 is threadedly extended into the corresponding screw groove 11; a positioning groove 14 is provided on one side of the four reinforcement blocks 5, and a positioning rod 15 is fixedly connected to one side of the four reinforcement blocks 5, and one end of the positioning rod 15 slides and extends into the corresponding positioning groove 14; the arc-shaped stopper 9 is made of aluminum alloy, and the dust-proof sleeve 10 is made of aluminum alloy.

[0030] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0032] In the description of this article, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, or a connection through an intermediate medium, or the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A strain type torque sensor, comprising a torque sensor body (1), characterized in that: The torque sensor body (1) is provided with a mounting shell (2) extending therethrough, two sealed bearings (3) are fixedly connected inside the mounting shell (2), the two sealed bearings (3) are provided with a common central axis (4), and both sides of the mounting shell (2) are provided with reinforcement mechanisms; The reinforcing mechanism comprises two reinforcing blocks (5) arranged outside the central axis (4), the inner walls of the two reinforcing blocks (5) are both provided with a rotation groove (6), the outer wall of the central axis (4) is fixedly sleeved with a fixing ring (7), the two sides of the fixing ring (7) respectively slide and extend into the corresponding rotation groove (6), the fixing ring (7) is movably inlaid with a plurality of limiting balls (8), and one side of the limiting balls (8) is in contact with the inner wall of the rotation groove (6).

2. A strain type torque sensor according to claim 1, characterized in that: The central axis (4) comprises an extension section (41), both sides of the extension section (41) are provided with connection sections (42), and one end of the connection section (42) is provided with an insertion interface (43).

3. A strain type torque sensor according to claim 2, characterized in that: An arc-shaped stopper (9) is fixedly connected to one side of the reinforcing block (5), and the outer wall fixed sleeve of the extension section (41) is provided with two dustproof sleeves (10), and the two dustproof sleeves (10) are respectively located in corresponding arc-shaped stoppers (9).

4. The strain type torque sensor according to claim 1, characterized in that: A plurality of screw grooves (11) are provided on both sides of the installation shell (2); a mounting sleeve (12) is fixedly connected to the outer wall of the reinforcement block (5); a plurality of fastening bolts (13) are threadedly connected through the mounting sleeve (12); the plurality of fastening bolts (13) are equidistantly distributed; one end of the fastening bolt (13) has a thread extending into a corresponding screw groove (11).

5. The strain type torque sensor according to claim 1, characterized in that: One side of each of the four reinforcement blocks (5) is provided with a positioning groove (14), and one side of each of the four reinforcement blocks (5) is fixedly connected with a positioning rod (15), and one end of the positioning rod (15) slides and extends into the corresponding positioning groove (14).

6. A strain type torque sensor according to claim 3, characterized in that: The arc-shaped stopper (9) is made of aluminum alloy, and the dust cover (10) is made of aluminum alloy.

Images