Angle correction gauge and tool assembly for switching of torque wrench

Abstract

The invention relates to the technical field of wrench accessories, and discloses an angle correction gauge and tool assembly for torque wrench switching, the angle correction gauge comprises a bottom shell, a dial disc and a reading disc, the reading disc is rotatably mounted on a center shaft of the bottom shell, the dial disc is arranged between the bottom shell and the reading disc, and the dial disc and the bottom shell are fixed; the outer side of the bottom shell is connected with a tail supporting piece, and the tail supporting piece is provided with a wrench bayonet used for being matched with a torque wrench in a clamped mode so that the torque wrench can extend in the radial direction of the center shaft. A stop block is mounted on the reading disc, and the stop block is provided with a stop part used for being matched with the adapter in a limiting manner; the center shaft is further provided with a protruding part, and the protruding part is used for axial positioning of the joint of the torque wrench and the adapter. A plurality of coefficient scales are arranged on the surface of the scale disc in the circumferential direction at intervals; the reading disc is provided with a reading window, and the reading window corresponds to the coefficient scales; with the central shaft as the vertex, the included angle between the wrench bayonet and the stop part is theta, the coefficient value displayed by the reading window is delta, and the delta and the theta are in one-to-one correspondence.

Description

Technical Field

[0001] The invention relates to the technical field of wrench accessories, in particular to an angle calibration standard and a tool assembly for torque wrench conversion. Background Art

[0002] In aircraft maintenance work, a large number of fasteners need to be frequently disassembled and assembled. Different fasteners have clear installation torque requirements. The installation torque is an important indicator to determine whether the fasteners are installed in place.

[0003] For narrow spaces, it is not possible to directly use a torque wrench to apply torque, and an adapter is required as an aid. The set torque is linearly related to the length and connection angle of the adapter. Figure 1 As shown, one end of the adapter 2a is locked with the fastener 3a, and the other end of the adapter 2a is connected to the torque wrench 1a. The formula in the maintenance manual SRM51-49-00 needs to be converted to obtain the set torque value. The conversion formula is as follows:

[0004]

[0005] Where A is the length of the torque wrench, L is the length of the adapter, θ is the angle between the center axis of the torque wrench and the adapter, T1 is the installation torque of the fastener required in the manual, and T2 is the set torque required by the torque wrench.

[0006] During maintenance operations, an angle ruler is used to measure the angle between the torque wrench and the adapter. It is difficult to ensure the positional relationship between the angle ruler, torque wrench and adapter, and the measurement reliability and accuracy are low. Moreover, the formula conversion is more complicated, and the error rate of calculating the set torque is high. Summary of the invention

[0007] The technical problem to be solved by the present invention is that: when using an angle ruler to measure the angle between a torque wrench and an adapter, it is difficult to ensure the positional relationship among the angle ruler, the torque wrench and the adapter, and the measurement reliability and accuracy are low; moreover, the formula conversion is relatively cumbersome, and the error rate of calculating the set torque is high.

[0008] In order to solve the above technical problems, the present invention provides a technical solution for an angle calibration standard for torque wrench conversion:

[0009] An angle calibration gauge for torque wrench adapter includes a bottom shell, a graduated disc and an indicating disc, wherein a central axis is provided in the middle of the bottom shell, the indicating disc is rotatably mounted on the central axis, the graduated disc is arranged between the bottom shell and the indicating disc, and the graduated disc is fixedly connected to the bottom shell;

[0010] The outer side of the bottom shell is connected to a tail support member, and the tail support member is provided with a wrench bayonet, and the wrench bayonet is used to engage with a torque wrench so that the torque wrench is arranged along the radial extension of the central axis;

[0011] A stop block is installed on the indicator disc, and the stop block has a stop portion for limiting the position with the adapter; the central axis passes through the indicator disc and is also provided with a protrusion, and the protrusion is used for axial positioning with the connection between the torque wrench and the adapter;

[0012] The surface of the scale disc corresponding to the indicating disc is provided with a plurality of coefficient scales, and the plurality of coefficient scales are evenly spaced along the circumferential direction; the indicating disc is also provided with an indicating window, and the indicating window corresponds to the coefficient scales;

[0013] With the central axis as the vertex, the connection angle between the wrench bayonet and the stopper is θ, and the coefficient value displayed in the indicating window is δ, and δ corresponds to θ one by one.

[0014] Furthermore, it is known that the length of the torque wrench is A, and the length of the adapter is L, which satisfies:

[0015] Furthermore, the plurality of coefficient scales are equally divided into 12*N parts in the circumferential direction of a circle with the central axis as the center, where N is an integer.

[0016] Furthermore, the coefficient value δ of the scale disk is symmetrically distributed about a diameter where the central axis is located, and the coefficient value δ is any value between 0.7 and 1.5.

[0017] Furthermore, the bottom shell includes an annular edge, the annular edge is arranged in a circular ring shape with the central axis as the center, and the scale disk and the indication disk are both arranged on the inner side of the annular edge;

[0018] The annular edge is also provided with a plurality of angular scales, which are equally divided into 36*n in the circumferential direction, where n is an integer, and the angle value of the angular scale corresponding to the wrench bayonet is zero.

[0019] Furthermore, an ear plate is fixedly provided on the outer side of the bottom shell body, the tail support member is hingedly connected to the ear plate, and the hinge axis of the tail support member is perpendicular to the radial direction of the scale disk. When the tail support member is erected, the wrench bayonet is engaged with the torque wrench.

[0020] Furthermore, the stop block is rotatably mounted on the indicating disc, the rotation axis of the stop block is arranged parallel to and spaced from the central axis, and at least two stop portions are provided on the periphery of the stop block.

[0021] Furthermore, three stopping parts are arranged on the outer periphery of the stopping block, radial distances between the three stopping parts relative to the rotation axis of the stopping block are not equal, and specification marks are respectively arranged at positions of the stopping block corresponding to the three stopping parts.

[0022] Furthermore, a one-way bearing is installed between the indicator disc and the central axis; or, a one-way bearing is installed between the indicator disc and the bottom shell.

[0023] In order to solve the above technical problems, the present invention provides a technical solution of a tool assembly based on an angle calibration standard for torque wrench conversion:

[0024] A tool assembly based on an angle calibration gauge for torque wrench conversion, comprising a torque wrench, an adapter and an angle calibration gauge, wherein the angle calibration gauge comprises a bottom shell, a scale disc and an indication disc, wherein a central axis is provided in the middle of the bottom shell, the indication disc is rotatably mounted at the central axis, the scale disc is arranged between the bottom shell and the indication disc, and the scale disc is fixedly connected to the bottom shell;

[0025] The outer side of the bottom shell is connected to a tail support member, and the tail support member is provided with a wrench bayonet, and the wrench bayonet is used to engage with a torque wrench so that the torque wrench is arranged along the radial extension of the central axis;

[0026] A stop block is installed on the indicator disc, and the stop block has a stop portion for limiting the position with the adapter; the central axis passes through the indicator disc and is also provided with a protrusion, and the protrusion is used for axial positioning with the connection between the torque wrench and the adapter;

[0027] The surface of the scale disc corresponding to the indicating disc is provided with a plurality of coefficient scales, and the plurality of coefficient scales are evenly spaced along the circumferential direction; the indicating disc is also provided with an indicating window, and the indicating window corresponds to the coefficient scales;

[0028] With the central axis as the vertex, the connection angle between the wrench bayonet and the stopper is θ, and the coefficient value displayed in the indicating window is δ, and δ corresponds to θ one by one.

[0029] Furthermore, it is known that the length of the torque wrench is A, and the length of the adapter is L, which satisfies:

[0030] Furthermore, the plurality of coefficient scales are equally divided into 12*N parts in the circumferential direction of a circle with the central axis as the center, where N is an integer.

[0031] Furthermore, the coefficient value δ of the scale disk is symmetrically distributed about a diameter where the central axis is located, and the coefficient value δ is any value between 0.7 and 1.5.

[0032] Furthermore, the bottom shell includes an annular edge, the annular edge is arranged in a circular ring shape with the central axis as the center, and the scale disk and the indication disk are both arranged on the inner side of the annular edge;

[0033] The annular edge is also provided with a plurality of angular scales, which are equally divided into 36*n in the circumferential direction, where n is an integer, and the angle value of the angular scale corresponding to the wrench bayonet is zero.

[0034] Furthermore, an ear plate is fixedly provided on the outer side of the bottom shell body, the tail support member is hingedly connected to the ear plate, and the hinge axis of the tail support member is perpendicular to the radial direction of the scale disk. When the tail support member is erected, the wrench bayonet is engaged with the torque wrench.

[0035] Furthermore, the stop block is rotatably mounted on the indicating disc, the rotation axis of the stop block is arranged parallel to and spaced from the central axis, and at least two stop portions are provided on the periphery of the stop block.

[0036] Furthermore, three stopping parts are arranged on the outer periphery of the stopping block, radial distances between the three stopping parts relative to the rotation axis of the stopping block are not equal, and specification marks are respectively arranged at positions of the stopping block corresponding to the three stopping parts.

[0037] Furthermore, a one-way bearing is installed between the indicator disc and the central axis; or, a one-way bearing is installed between the indicator disc and the bottom shell.

[0038] Compared with the prior art, the angle calibration gauge and tool assembly for torque wrench conversion of the present invention has the following beneficial effects: the angle calibration gauge for torque wrench conversion adopts the design form of a bottom shell, a scale disc, an indicating disc, a tail support and a stop block, wherein a central axis is provided in the middle of the bottom shell, the indicating disc is rotatably mounted at the central axis, the scale disc is arranged between the bottom shell and the indicating disc, and the scale disc is fixedly connected to the bottom shell. The scale disc is fixed relative to the bottom shell, the indicating disc can rotate in a circle around the central axis, and the corresponding coefficient value δ of the scale disc can be displayed by rotating the indicating disc at different angles.

[0039] In addition, the outer side of the bottom shell is connected with a tail support, and the torque wrench is engaged with the tail support through the wrench bayonet of the tail support, so that the torque wrench is arranged along the radial extension of the central axis, and the relative position of the torque wrench and the bottom shell is accurately limited. A stop block is installed on the indicator disc, and the stop part of the stop block is used to limit the adapter, so as to accurately limit the relative position of the adapter and the indicator disc.

[0040] The central axis passes through the indicating disc and is also provided with a protrusion, which is used to play an axial positioning role on the connection between the torque wrench and the adapter, so that the bottom shell, the indicating disc, the torque wrench and the adapter are at the same center of a circle, thereby ensuring that the rotation angle of the bottom shell and the indicating disc is equal to the connection angle θ between the wrench bayonet and the stopper, and is also equal to the angle between the torque wrench and the adapter.

[0041] In addition, a plurality of coefficient scales are arranged on the surface of the scale disk corresponding to the indicating disk, and the plurality of coefficient scales are evenly spaced along the circumferential direction. The indicating disk is also provided with an indicating window, and the indicating window corresponds to the coefficient scales. With the central axis as the vertex, the connection angle between the wrench bayonet and the stopper is θ, and the coefficient value displayed in the indicating window is δ, and δ corresponds to θ one by one.

[0042] The key is that the coefficient value δ displayed in the indication window corresponds to the connection angle θ between the wrench bayonet and the stopper. When the indication disc rotates to the position where the stopper and the adapter are limited, the connection angle θ reflects the angle between the torque wrench and the adapter. The corresponding coefficient value δ is displayed through the indication window. The coefficient value δ is calculated in advance according to the conversion formula. The displayed coefficient value δ can be multiplied by the installation torque T1 of the fastener required in the manual to quickly and accurately obtain the set torque T2 required by the torque wrench. Compared with the use of an angle ruler, the measurement reliability and accuracy are high, which greatly simplifies the formula conversion process and reduces the error rate of calculating the set torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic diagram of the connection between the existing torque wrench and the adapter in the background technology;

[0044] Figure 2 It is a three-dimensional diagram of the assembly of the angle calibration standard for torque wrench adapter, the torque wrench and the adapter in the embodiment of the present invention;

[0045] Figure 3 yes Figure 2 Top view of the assembly of the middle angle calibration standard, torque wrench and adapter;

[0046] Figure 4 It is a three-dimensional schematic diagram of an angle calibration rule for torque wrench adapter in an embodiment of the present invention;

[0047] Figure 5 1 is an exploded schematic diagram of an angle calibration rule for torque wrench conversion according to an embodiment of the present invention;

[0048] Figure 6 is a bar graph of angle-coefficient values ​​of an angle calibration standard for torque wrench conversion in an embodiment of the present invention;

[0049] Figure 1Middle: 1a-torque wrench, 2a-adapter, 3a-fastener;

[0050] Figures 2 to 5 Middle: 1- bottom shell, 10- center axis, 11- protrusion, 12- annular edge, 13- angle scale, 14- ear plate, 15- one-way bearing, 2- scale disk, 20- coefficient scale, 3- indication disk, 30- indication window, 4- tail support, 40- spanner bayonet, 5- stop block, 50- stop part, 6- torque wrench, 7- adapter. DETAILED DESCRIPTION

[0051] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0052] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like used in the present invention to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0054] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] like Figures 2 to 5As shown, the angle calibration standard for torque wrench adapter according to the embodiment of the present invention comprises a bottom shell 1, a scale disk 2 and an indication disk 3. A central axis 10 is provided in the middle of the bottom shell 1. The indication disk 3 is rotatably mounted on the central axis 10. The scale disk 2 is arranged between the bottom shell 1 and the indication disk 3, and the scale disk 2 is fixedly connected to the bottom shell 1.

[0056] The outer side of the bottom shell body 1 is connected to a tail support member 4, which is provided with a wrench bayonet 40, which is used to engage with the torque wrench 6 so that the torque wrench 6 is arranged along the radial extension of the central axis 10; a stop block 5 is installed on the indicating disc 3, and the stop block 5 has a stop portion 50 for limiting the engagement with the adapter 7; the central axis 10 passes through the indicating disc 3 and is also provided with a protrusion 11, which is used for axial positioning at the connection between the torque wrench 6 and the adapter 7.

[0057] The surface of the scale disk 2 corresponding to the indicating disk 3 is provided with a plurality of coefficient scales 20, and the plurality of coefficient scales 20 are evenly spaced along the circumferential direction; the indicating disk 3 is also provided with an indicating window 30, and the indicating window 30 corresponds to the coefficient scale 20; with the central axis 10 as the vertex, the connection angle between the wrench bayonet 40 and the stopper 50 is θ, and the coefficient value displayed in the indicating window 30 is δ, and δ corresponds to θ one by one.

[0058] The angle calibration standard for torque wrench conversion adopts the design form of a bottom shell 1, a scale disc 2, an indicating disc 3, a tail support 4 and a stop block 5, wherein a central axis 10 is provided in the middle of the bottom shell 1, the indicating disc 3 is rotatably mounted at the central axis 10, the scale disc 2 is arranged between the bottom shell 1 and the indicating disc 3, and the scale disc 2 is fixedly connected to the bottom shell 1. The scale disc 2 is fixed relative to the bottom shell 1, and the indicating disc 3 can rotate in a circle around the central axis 10. By rotating the indicating disc 3 at different angles, the corresponding coefficient value δ of the scale disc 2 can be displayed.

[0059] In addition, the outer side of the bottom shell 1 is connected with a tail support 4, and the wrench bayonet 40 of the tail support 4 is engaged with the torque wrench 6, so that the torque wrench 6 is arranged along the radial direction of the central axis 10, and the relative position of the torque wrench 6 and the bottom shell 1 is accurately limited. A stop block 5 is installed on the indicator disk 3, and the stop portion 50 of the stop block 5 is used to limit the adapter 7, and the relative position of the adapter 7 and the indicator disk 3 is accurately limited.

[0060] The central axis 10 passes through the indicating disc 3 and is also provided with a protrusion 11. The protrusion 11 is used to axially position the connection between the torque wrench 6 and the adapter 7, so that the bottom shell 1, the indicating disc 3, the torque wrench 6 and the adapter 7 are at the same center of a circle, thereby ensuring that the rotation angle of the bottom shell 1 and the indicating disc 3 is equal to the connection angle θ between the wrench bayonet 40 and the stopper 50, and is also equal to the angle between the torque wrench 6 and the adapter 7.

[0061] In addition, a plurality of coefficient scales 20 are provided on the surface of the scale disk 2 corresponding to the indicating disk 3, and the plurality of coefficient scales 20 are evenly spaced along the circumferential direction. The indicating disk 3 is also provided with an indicating window 30, and the indicating window 30 corresponds to the coefficient scale 20; with the central axis 10 as the vertex, the connection angle between the wrench bayonet 40 and the stopper 50 is θ, and the coefficient value displayed in the indicating window 30 is δ, and δ corresponds to θ one by one.

[0062] The key is that the coefficient value δ displayed in the indication window 30 corresponds to the connection angle θ between the wrench bayonet 40 and the stopper 50. When the indication disc 3 rotates to the position where the stopper 50 and the adapter 7 are limited, the connection angle θ reflects the angle between the torque wrench 6 and the adapter 7. The corresponding coefficient value δ is displayed through the indication window 30. The coefficient value δ is calculated in advance according to the conversion formula. The displayed coefficient value δ can be multiplied by the installation torque T1 of the fastener required in the manual to quickly and accurately obtain the set torque T2 required by the torque wrench. Compared with the use of an angle ruler, the measurement reliability and accuracy are high, the formula conversion process is greatly simplified, and the error rate of calculating the set torque is reduced.

[0063] like Figure 2 As shown, it is known that the length of the torque wrench 6 is A and the length of the adapter 7 is L, which satisfies:

[0064] It should be noted that the angle calibration standard is only a set of coefficient values ​​δ calculated in advance for the specific length A of the torque wrench 6 and the specific length L of the adapter 7. If the length A of the torque wrench 6 and / or the length L of the adapter 7 changes, it is necessary to use another specific angle calibration standard. Figure 2 , Figure 3 In the embodiment, the stop block 5 is not in the limit state matched with the adapter 7. When in use, the indicating disk 3 and the stop block 5 need to be rotated around the central axis 10 to the limit state before the connection angle θ and the coefficient value δ can be directly read.

[0065] As a further preferred solution, the plurality of coefficient scales 20 are divided into 12*N equal parts in the circumferential direction with the central axis 10 as the center, where N is an integer. In this embodiment, there are 36 coefficient scales 20, that is, 36 coefficient scales 20 divide the scale disk 2 into 36 equal parts, and each scale occupies a 10° central angle, so that the coefficient values ​​δ corresponding to the connection angles θ of 36 groups can be displayed. Moreover, the coefficient values ​​δ of the scale disk 2 are symmetrically distributed about a diameter where the central axis 10 is located, and the coefficient value δ is any value between 0.7 and 1.5.

[0066] Correspondingly, the bottom shell 1 includes an annular edge 12, which is arranged in a circular ring with the central axis 10 as the center, and the scale disk 2 and the indication disk 3 are both arranged on the inner side of the annular edge 12; the annular edge 12 is also provided with a plurality of angular scales 13, which are divided into 36*n equal parts in the circumferential direction, n is an integer, and the angle value of the angular scale 13 corresponding to the wrench bayonet 40 is zero. Specifically, there are 36 angular scales 13, each of which represents a 10° central angle, that is, the angle between the torque wrench 6 and the adapter 7 is equal to ten times the angular scale 13.

[0067] In units of 5°, the one-to-one correspondence between the connection angle θ and the coefficient value δ is calculated from 0 to 180°, as shown in the following table:

[0068]

[0069]

[0070] like Figure 6 As shown, the one-to-one correspondence between the connection angle θ and the coefficient value δ is calculated from 0 to 180° in units of 10°, that is, the coefficient values ​​δ of the scale disk 2 are arranged in sequence along the circumferential direction, and the coefficient value δ corresponding to the connection angle θ can be quickly read through the display window 30, which simplifies the formula conversion process.

[0071] In this embodiment, an ear plate 14 is fixedly provided on the outer side of the bottom shell body 1, the tail support member 4 is hingedly connected to the ear plate 14, and the hinge axis of the tail support member 4 is perpendicular to the radial direction of the scale disk 2. When the tail support member 4 is erected, the wrench bayonet 40 is engaged with the torque wrench 6 for convenient storage and deployment.

[0072] In addition, the stopper block 5 is rotatably mounted on the indicator disc 3, the rotation axis of the stopper block 5 is arranged parallel to the central axis 10, and at least two stopper portions 50 are arranged on the periphery of the stopper block 5. As a further preferred solution, three stopper portions 50 are arranged on the periphery of the stopper block 5, and the radial distances between the three stopper portions 50 relative to the rotation axis of the stopper block 5 are not equal. The positions of the stopper block 5 corresponding to the three stopper portions 50 are also provided with specification marks. The three specification marks are 5 / 16, 9 / 32, and 3 / 8, respectively, corresponding to adapters 7 of different specifications, thereby improving the adaptability and versatility of the angle calibration standard.

[0073] A one-way bearing is installed between the indicating disc 3 and the central axis 10; or, a one-way bearing 15 is installed between the indicating disc 3 and the bottom shell 1, which ensures that the indicating disc 3 can only rotate clockwise or counterclockwise relative to the bottom shell 1 or the central axis 10, thereby ensuring that the connection angle θ is equal to the angle between the torque wrench 6 and the adapter 7.

[0074] The specific embodiment of the tool assembly based on the angle calibration gauge for torque wrench conversion of the present invention comprises a torque wrench, an adapter and an angle calibration gauge. The angle calibration gauge is the angle calibration gauge for torque wrench conversion in the above specific embodiment. The assembly relationship between the torque wrench, the adapter and the angle calibration gauge refers to the embodiment of the angle calibration gauge for torque wrench conversion of the above invention, which will not be repeated here.

[0075] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. An angle calibration standard for torque wrench adapter, characterized in that: It includes a bottom shell, a scale disc and an indication disc, wherein a central axis is provided in the middle of the bottom shell, the indication disc is rotatably mounted on the central axis, the scale disc is arranged between the bottom shell and the indication disc, and the scale disc is fixedly connected to the bottom shell; The outer side of the bottom shell is connected to a tail support member, and the tail support member is provided with a wrench bayonet, and the wrench bayonet is used to engage with a torque wrench so that the torque wrench is arranged along the radial extension of the central axis; A stop block is installed on the indicator disc, and the stop block has a stop portion for limiting the position with the adapter; the central axis passes through the indicator disc and is also provided with a protrusion, and the protrusion is used for axial positioning with the connection between the torque wrench and the adapter; The surface of the scale disc corresponding to the indicating disc is provided with a plurality of coefficient scales, and the plurality of coefficient scales are evenly spaced along the circumferential direction; the indicating disc is also provided with an indicating window, and the indicating window corresponds to the coefficient scales; With the central axis as the vertex, the connection angle between the wrench bayonet and the stopper is θ, and the coefficient value displayed in the indicating window is δ, and δ corresponds to θ one by one.

2. The angle calibration standard for torque wrench conversion according to claim 1 is characterized in that: It is known that the length of the torque wrench is A, and the length of the adapter is L, which satisfies:

3. The angle calibration standard for torque wrench conversion according to claim 1 is characterized in that: The plurality of coefficient scales are equally divided into 12*N parts in the circumferential direction of a circle with the central axis as the center, where N is an integer.

4. The angle calibration standard for torque wrench conversion according to claim 1 is characterized in that: The coefficient value δ of the scale disk is symmetrically distributed about a diameter where the central axis is located, and the coefficient value δ is any value between 0.7 and 1.

5.

5. The angle calibration standard for torque wrench conversion according to claim 1, characterized in that: The bottom shell includes an annular edge, the annular edge is arranged in a circular ring shape with the central axis as the center, and the scale disk and the indication disk are both arranged on the inner side of the annular edge; The annular edge is also provided with a plurality of angular scales, which are equally divided into 36*n in the circumferential direction, where n is an integer, and the angle value of the angular scale corresponding to the wrench bayonet is zero.

6. The angle calibration standard for torque wrench conversion according to claim 1, characterized in that: An ear plate is fixedly provided on the outer side of the bottom shell body, the tail support member is hingedly connected to the ear plate, and the hinge axis of the tail support member is perpendicular to the radial direction of the scale disk. When the tail support member is erected, the wrench bayonet is engaged with the torque wrench.

7. The angle calibration standard for torque wrench conversion according to claim 1, characterized in that: The stop block is rotatably mounted on the indicating disc, the rotation axis of the stop block is parallel to the central axis and is arranged at intervals, and at least two stop parts are arranged on the outer periphery of the stop block.

8. The angle calibration standard for torque wrench conversion according to claim 1, characterized in that: The outer periphery of the stop block is provided with three stop parts, the radial distances between the three stop parts relative to the rotation axis of the stop block are not equal, and the positions of the stop block corresponding to the three stop parts are respectively provided with specification marks.

9. The angle calibration standard for torque wrench conversion according to claim 1, characterized in that: A one-way bearing is installed between the indicator disc and the central shaft; or, a one-way bearing is installed between the indicator disc and the bottom shell.

10. A tool assembly based on an angle calibration standard for torque wrench conversion, characterized in that: It comprises a torque wrench, an adapter and an angle calibration standard, wherein the angle calibration standard is the angle calibration standard for torque wrench adapter according to any one of claims 1 to 9.

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