Wrench component and wrench assembly

Abstract

The invention provides a wrench component and a wrench assembly. The wrench component comprises a handle, a wrench head and a connecting part, wherein the orthographic projection of the handle in a first plane has a bending part; the wrench head is arranged at the first end of the handle and used for being matched with a bolt or a nut. The connecting part is arranged above the second end of the handle, the orthographic projection of the outer side surface in the first plane comprises a regular polygon, and a wrench head of the torque wrench is sleeved with the regular polygon; the first plane is parallel to the surface of the handle away from the connecting part. The orthographic projection of the wrench in the first plane has a bent position, so that the wrench component can conveniently bypass an obstacle to reach a target bolt or nut in a narrow space, and the wrench component can be more conveniently used in the narrow space. The end, away from the wrench head, of the handle is provided with the connecting part used for being connected with the torque wrench in a sleeving mode; and the device can be conveniently combined with a torque wrench, so that torque can be accurately applied in a narrow space.

Description

Technical Field

[0001] This application relates to the technical field of hand tools. Specifically, this application relates to a wrench component and a wrench assembly. Background Art

[0002] As a basic tool in mechanical maintenance, installation, and disassembly work, the use efficiency and torque output ability of a wrench directly affect energy and efficiency.

[0003] During the assembly process of a rocket engine, due to the relatively complex coordination relationship between various components, the operating environment is narrow, and due to the high assembly precision of the rocket engine, it is necessary to ensure that the torque value of each bolt or nut is within the specified range during the assembly process. However, the current wrenches cannot accurately apply torque in a narrow space. Summary of the Invention

[0004] In view of the shortcomings of the existing methods, this application proposes a wrench component and a wrench assembly to solve the technical problem that the current wrenches cannot accurately apply torque in a narrow space in the related art.

[0005] In a first aspect, an embodiment of this application provides a wrench component, including: A handle with a bend in its orthographic projection in a first plane; A wrench head provided at a first end of the handle for mating with a bolt or nut; A connecting portion provided above a second end of the handle, the outer side surface of which includes a regular polygon in its orthographic projection in the first plane for a wrench head of a torque wrench to fit over; the first plane is parallel to the surface of the handle away from the connecting portion.

[0006] Optionally, the handle includes a first section and a second section. The wrench head is provided at an end of the first section away from the second section. The projection of the handle in a second plane is in an S shape. The lower surface of the first section is higher than the lower surface of the second section. The connecting portion is provided on the upper surface of the second section. The second plane is perpendicular to the first plane; the plane where the geometric center of the connecting portion and the geometric center of the wrench head are located is parallel to the lower surface of the second section.

[0007] Optionally, the lower surface of the first section is parallel to the first plane, and the lower surface of the wrench head and the lower surface of the first section are in the same plane.

[0008] Optionally, the lower surface of the first section is parallel to the lower surface of the second section, and an arc section is provided between the first section and the second section. The first section, the arc section, and the second section are integrally formed.

[0009] Optionally, the second segment includes a first sub-segment and a second sub-segment. A bend is formed between the first sub-segment and the second sub-segment in the first plane with a smooth transition, and the first sub-segment, the arc segment, and the first segment extend continuously in the positive projection in the first plane.

[0010] Optionally, the projection of the connecting portion in the first plane is a regular hexagon, and each side surface of the connecting portion is perpendicular to the first plane. Two parallel side surfaces of the connecting portion are perpendicular to the extension line of the second segment.

[0011] Optionally, one end of the second segment away from the first segment extends outward relative to the connecting portion by a part.

[0012] Optionally, the wrench member includes at least one of the following: The included angle at the bend of the handle is an obtuse angle, and the length of the force arm of the wrench member is proportional to the included angle at the bend.

[0013] The wrench head is a socket head with at least six internal angles; The handle and the wrench head are integrally formed; The connecting portion is welded to the handle.

[0014] In a second aspect, an embodiment of the present application provides a wrench assembly, including a wrench member and a torque wrench. The torque wrench is configured to be sleeved around the connecting portion of the wrench member when the wrench head is sleeved around the periphery of a bolt or a nut.

[0015] Optionally, the handle of the wrench member includes a first segment and a second segment. The second segment includes a first sub-segment and a second sub-segment. The positive projection of the first sub-segment and the second sub-segment in the first plane forms a bend with an obtuse included angle, and the length of the force arm of the wrench member is proportional to the included angle of the bend; The positive projection of the torque wrench and the second segment extends continuously in the first plane, and the reading of the torque wrench is inversely proportional to the length of the force arm of the wrench member.

[0016] The beneficial technical effects brought by the technical solution provided in the embodiment of the present application include: by designing the shape of the handle, there is a bending part within the projection of the handle on the first plane, and the first plane is parallel to the surface of the handle away from the connecting part, so that the projection of the handle on the first plane presents an approximately L-shaped structure, which is convenient for bypassing obstacles to reach the target bolt or nut in a narrow space and provides a better operating angle in a narrow space; the wrench component of the present application is provided with a connecting part for fitting with a torque wrench at one end of the handle away from the wrench head, which is convenient for combining with the torque wrench, so as to accurately apply torque in a narrow space, thereby improving the assembly accuracy of each part inside the rocket engine.

[0017] Additional aspects and advantages of the present application will be given in part in the following description, and these will become obvious from the following description or be understood through the practice of the present application. Brief Description of the Drawings

[0018] The above-mentioned and / or additional aspects and advantages of the present application will become obvious and easy to understand from the following description of the embodiments in conjunction with the drawings, where: Figure 1 is a schematic structural diagram of a wrench component provided by an embodiment of the present application; Figure 2 is a schematic structural diagram of the front projection of a wrench component provided by an embodiment of the present application on the first plane; Figure 3 is a schematic structural diagram of the front projection of a wrench component provided by an embodiment of the present application on the second plane. Description of the Reference Numerals: 10 - Handle; 11 - First section; 12 - Second section; 121 - First sub-section; 122 - Second sub-section; 123 - Bending part; 13 - Arc section; 20 - Wrench head; 30 - Connecting part. Detailed Embodiments

[0019] The embodiments of the present application will be described below with reference to the drawings in the present application. It should be understood that the embodiments described below in conjunction with the drawings are exemplary descriptions for explaining the technical solutions of the embodiments of the present application and do not constitute limitations on the technical solutions of the embodiments of the present application.

[0020] Those skilled in the art can understand that, unless specifically stated, the terms "the" and "said" used herein may also include the plural form. It should be further understood that the term "including" used in the specification of the present application means the presence of the described features, integers, steps, operations, elements and / or components, but does not exclude the presence of other features, information, data, steps, operations, elements, components and / or combinations thereof supported by the art. The term "and / or" used herein means at least one of the items defined by the term, for example, "A and / or B" can be implemented as "A", or as "B", or as "A and B".

[0021] To make the objectives, technical solutions and advantages of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0022] During the assembly process of a rocket engine, due to the relatively complex coordination relationship between various components, the operating environment is narrow, and due to the high assembly precision of the rocket engine, it is necessary to ensure that the torque value of each bolt or nut is within the specified range during the assembly process.

[0023] In the related art, an S-shaped wrench adapted to be used in a narrow space is proposed. The overall cross-section of the S-shaped wrench is S-shaped, and the wrench head is located at one end of the handle. This traditional S-shaped wrench can only pre-tighten fasteners and cannot accurately apply a torque value. And during the S-shaped pre-tightening process, there may be a problem that the direction of the S-shaped wrench forms an angle with the direction of the bolt or nut, causing the wrench to slip. There is also a torque wrench in the related art that can accurately control the applied torque. The torque wrench forms a closed-loop control circuit through a sensor, an adjustable hydraulic buffer, a motor, and a controller, so that the torque control during the operation gets rid of the defect of unstable manual control. However, the operation of the torque wrench is restricted in a narrow space, and it is difficult to accurately apply torque in a working environment with limited space.

[0024] In summary, the current wrenches cannot accurately apply torque in a narrow space.

[0025] To solve the technical problem that the current wrenches in the related art cannot accurately apply torque in a narrow space, an embodiment of the present application provides a wrench component.

[0026] Refer to Figures 1 - 3 , the wrench component of the present application includes a handle 10, a wrench head 20 and a connecting portion 30 respectively located at both ends of the handle 10. There is a bending portion 123 in the orthographic projection of the handle 10 in the first plane. The wrench head 20 is arranged at the first end of the handle 10 and is used to cooperate with a bolt or a nut. The connecting portion 30 is arranged above the second end of the handle 10, and the orthographic projection of the outer side surface in the first plane includes a regular polygon and is used for the wrench head 20 of the torque wrench to be sleeved. The first plane is parallel to the surface of the handle 10 away from the connecting portion 30.

[0027] The wrench component of the present application is designed with the outer shape of the handle 10 such that there is a bending portion 123 within the projection of the handle 10 in the first plane, which is parallel to the surface of the handle 10 away from the connecting portion 30. This makes the projection of the handle 10 in the first plane present an approximately L-shaped structure, facilitating the wrench head 20 to bypass obstacles in a narrow space to reach the target bolt or nut and providing a more suitable operating angle in a narrow space. The wrench component of the present application is provided with a connecting portion 30 at one end of the handle 10 away from the wrench head 20 for fitting with a torque wrench, facilitating the combination with the torque wrench, thereby facilitating the precise application of torque in a narrow space.

[0028] Optionally, referring to Figures 2 - 3 , the handle 10 includes a first section 11 and a second section 12, and the wrench head 20 is arranged at the end of the first section 11 away from the second section 12. The projection of the handle 10 in the second plane is S-shaped, the lower surface of the first section 11 is higher than the lower surface of the second section 12, and the connecting portion 30 is arranged on the upper surface of the second section 12. The second plane is perpendicular to the first plane. The plane where the geometric center of the connecting portion 30 and the geometric center of the wrench head 20 are located is parallel to the lower surface of the second section 12.

[0029] It should be noted that referring to Figures 2 - 3 , if the first plane is defined as the horizontal plane, then the second plane is the vertical plane. The lower surface of the second section 12 is the other side opposite to the connecting portion 30, that is, a surface of the second section 12 away from the connecting portion 30, and the lower surface of the first section 11 is a surface adjacent to the lower surface of the second section 12 and opposite to the connecting portion 30.

[0030] Figure 3 In [reference], the line segment a-a' is the projection in the first plane of the line connecting the geometric center of the connecting portion 30 and the geometric center of the wrench head 20. Figure 3 In [reference], the straight line b-b' is the projection of the first plane in the second plane, and the line segment a-a' is parallel to the straight line b-b'.

[0031] By designing the lower surface of the first section 11 where the wrench head 20 is arranged to be higher than the lower surface of the second section 12 where the connecting portion 30 is arranged, there is a height difference between the first section 11 and the second section 12, making the projection of the handle 10 in the second plane S-shaped. The size of the wrench component of the present application can be further reduced, and by means of the outer shape design of the wrench component, it is more suitable for use in a narrow space and more convenient to apply torque in a narrow space.

[0032] By designing that the geometric center of the connecting part 30 and the geometric center of the wrench head 20 are in the same plane, this plane is parallel to the lower surface of the second section 12, and the lower surface of the second section 12 is parallel to the first plane, that is, the plane where the geometric center of the connecting part 30 and the geometric center of the wrench head 20 are located is parallel to the first plane. When the torque wrench is combined with the connecting part 30, the plane where the geometric center of the connecting part 30 and the geometric center of the wrench head 20 are located and the plane where the torque wrench is located are also parallel to the first plane, making the plane where the geometric center of the connecting part 30 and the geometric center of the wrench head 20 are located parallel to the plane where the torque wrench is located, which is convenient for the torque wrench to accurately apply torque.

[0033] Optionally, referring to Figures 2 - 3 , the lower surface of the first section 11 is parallel to the first plane, and the lower surface of the wrench head 20 and the lower surface of the first section 11 are in the same plane.

[0034] By designing that the lower surface of the wrench head 20 is flush with the lower surface of the first section 11, and the lower surfaces of the wrench head 20 and the first section 11 are both parallel to the first plane, when applying torque to a nut or a bolt, the lower surface of the first section 11 can be abutted against a horizontal surface (such as the upper surface or the lower surface) of the workpiece, and then the nut or the bolt can be tightened by using the wrench head 20. Since the nut or the bolt needs to fit with the surface of the workpiece, during the operation, making the lower surface of the first section 11 fully fit with the surface of the workpiece can ensure that there is no angle between the wrench head 20 and the bolt or the nut in the horizontal direction, avoiding the wrench head 20 from slipping during the screwing process, which is beneficial to improving the accuracy of the applied torque and ensuring the fastening effect on the bolt or the nut.

[0035] Optionally, referring to Figures 2 - 3 , the lower surface of the first section 11 is parallel to the lower surface of the second section 12, an arc section 13 is provided between the first section 11 and the second section 12, and the first section 11, the arc section 13 and the second section 12 are integrally formed.

[0036] By designing that the lower surface of the second section 12 is parallel to the lower surface of the first section 11, during use, it can be ensured that the transmission of force between the first section 11 and the second section 12 is more direct and effective. In this way, the force applied by the user can be more efficiently concentrated on the bolt or the nut that needs to be tightened or loosened, improving the work efficiency. In addition, if there is no suitable position for abutting against the first section 11 near the bolt or the nut that needs to be tightened or loosened in a narrow space, the lower surface of the second section 12 can also be selected to abut against the horizontal upper surface of the workpiece, so as to ensure that the wrench head 20 is parallel to the horizontal plane, thereby ensuring that there is no angle between the wrench head 20 and the bolt or the nut in the horizontal direction and reducing the probability of the wrench head 20 slipping during the screwing process.

[0037] A smooth transition is achieved between the first section 11 and the second section 12 by providing an arc section 13. This not only effectively disperses stress, avoiding stress concentration at the abrupt change in shape, but also reduces the risk of scratching or abrasion to external objects (such as other tools, equipment, or workbench surfaces).

[0038] Optionally, referring to Figures 1 - 3 , the thickness of the first section 11 is the same as that of the second section 12, making the strength distribution at various positions of the handle 10 relatively uniform. During use, the handle 10 is not easily broken or deformed at specific points, increasing the overall durability of the tool. Keeping the same thickness at all positions of the handle 10 can also simplify the production process and facilitate machining.

[0039] Optionally, referring to Figure 2 , the second section 12 includes a first sub-section 121 and a second sub-section 122. A bend 123 is formed between the first sub-section 121 and the second sub-section 122 in the first plane and has a smooth transition. The orthographic projections of the first sub-section 121, the arc section 13, and the first section 11 continuously extend in the first plane.

[0040] By arranging the bend 123 in the second section 12, the projection of the second section 12 in the first plane presents an approximately L-shaped structure, and the projections of the first section 11 and the second section 12 in the second plane present an S-shaped structure. The overall shape of the handle 10 is a combination of an S-shaped structure and an L-shaped structure located in two mutually perpendicular planes, making the shape and size of the handle 10 more compact. In some cases, the L-shaped second section 12 can provide different gripping points or force application directions when needed, and the L-shaped structure of the second section 12 can be used to obtain better leverage; in other cases, it may be more inclined to use the overall S-shaped structure to complete the task. Such an integrated design combines multiple functions, improving the versatility and practicality of the wrench component of the present application and making the wrench component of the present application more suitable for flexible use in a narrow space.

[0041] The orthographic projections of the first section 11, the arc section 13, and the first sub-section 121 continuously extend in the first plane, which helps to maintain the stability of the wrench during operation, better control the applied force and direction during operation, and facilitate the precise application of torque in a narrow space.

[0042] Optionally, in another embodiment, the bend 123 is arranged at the junction of the first section 11 and the second section 12, that is, the bend 123 is the aforementioned arc section 13, and the projection of the arc section 13 in the first plane presents an approximately L-shaped structure, making the overall projection of the handle 10 in the first plane present an approximately L-shaped structure.

[0043] Optionally, referring to Figures 2 - 3, the projection of the connecting portion 30 in the first plane is a regular hexagon, and each side surface of the connecting portion 30 is perpendicular to the first plane. Two parallel side surfaces of the connecting portion 30 are perpendicular to the extension line of the second segment 122.

[0044] The connecting portion 30 is configured as a convex block whose projection in the first plane is a regular hexagon, and it is designed such that two parallel side surfaces of the convex block are perpendicular to the extension line of the second segment 122. After the torque wrench is sleeved with the convex block, the projections of the torque wrench and the second segment 122 in the first plane extend continuously, which not only improves the efficiency of force transmission but also reduces operation errors caused by force dispersion, making the applied torque more effective and concentrated, and facilitating the accurate application of torque by the torque wrench.

[0045] Optionally, referring to Figure 3 , one end of the second segment 122 far from the first segment 121 extends outward relative to the connecting portion 30 by a part.

[0046] So that a part of the second segment 122 extends outward relative to the connecting portion 30. After the torque wrench is sleeved with the connecting portion 30, the main body of the torque wrench can abut against the upper surface of this part that the second segment 122 extends outward, thereby making the sleeving of the torque wrench and the wrench component of the present application more stable.

[0047] Optionally, referring to Figure 2 , the included angle of the bent portion 123 of the handle 10 is an obtuse angle, and the force arm length of the wrench component is proportional to the included angle of the bent portion 123.

[0048] Optionally, the included angle of the bent portion 123 of the handle 10 is 100 degrees to 130 degrees, including the lower limit value of 100 degrees and the upper limit value of 130 degrees.

[0049] By designing the included angle of the bent portion 123 of the handle 10 to be an obtuse angle, and as the included angle of the bent portion 123 increases, the force arm of the wrench component, that is, the length of the projection of the line connecting the geometric center of the connecting portion 30 and the geometric center of the wrench head 20 in the first plane, also gradually increases. According to the torque formula: (Expression 1) In Expression 1, is the torque, r is the force arm length, F is the applied force, is the included angle between the direction of the force and the force arm.

[0050] When the force arm length (r) of the wrench component increases, the applied force (F) on the wrench component decreases, thus making it more convenient to apply force in a narrow space.

[0051] In the present application, is the effective lever arm length from the axis of the bolt or nut to the force application point of the torque wrench, that is, the length of the line segment connecting the geometric center of the wrench head 20 to the geometric center of the connecting part 30, which is the force arm length of the wrench component of the present application. Therefore, the actual torque of the bolt or nut is as follows: Assume that the effective lever arm length of the torque wrench itself is , is the value read by the torque wrench, is the actual torque value acting on the bolt or nut, is:[[]] (Expression 2)[[]] Since the assembly accuracy of each part of the rocket engine is relatively high, the bolts or nuts at each position need to have accurate torque values, and the internal operating environment of the rocket engine is relatively narrow, which is not convenient for the operator to apply force. Assume that the actual torque values acting on the bolts or nuts at each position remain unchanged. When increases, the value read by the torque wrench decreases, that is, the torque value applied by the operator to the torque wrench decreases, which is more convenient for the operator to apply force, making the wrench component of the present application more convenient to accurately apply torque in a narrow space.[[]]

[0052] Optionally, referring to Figures 1 - 2 , the wrench head 20 is a socket head with at least six internal angles. In the present application, the internal part of the socket head has 12 internal angles and can tightly fit around a hexagonal or dodecagonal bolt or nut.[[]]

[0053] Optionally, the handle 10 and the wrench head 20 are integrally formed, and the connecting part 30 is welded to the handle 10, which is convenient for the processing of the wrench component of the present application and ensures the connection strength between the connecting part 30 and the handle 10, and ensures the efficiency of torque transmission.[[]]

[0054] Based on the same inventive concept, the embodiment of the present application provides a wrench assembly, including a torque wrench (not shown in the figure) and the wrench component in the above embodiment. The torque wrench is configured to fit around the connecting part 30 of the wrench component when the wrench head 20 fits around the periphery of the bolt or nut.[[]]

[0055] By combining the torque wrench with the wrench component, it is convenient to accurately apply torque to the bolt or nut in a narrow space.[[]]

[0056] Optionally, the handle 10 of the wrench component includes a first section 11 and a second section 12. The second section 12 includes a first sub-section 121 and a second sub-section 122. The orthographic projection of the first sub-section 121 and the second sub-section 122 in the first plane forms a bend 123 with an obtuse angle. The force arm length of the wrench component is proportional to the angle of the bend 123.[[]]

[0057] The positive projection of the torque wrench and the second segment 122 in the first plane extends continuously, and the reading of the torque wrench is inversely proportional to the length of the force arm of the wrench component.

[0058] By combining the torque wrench with the wrench component, and the positive projection of the wrench component in the first plane presents an approximately L-shaped structure, and the positive projection of the wrench component in the second plane presents an S-shaped structure. The first plane is perpendicular to the second plane. The shape design of the torque wrench combined with the wrench component enables the wrench assembly of the present application to accurately apply torque in a narrow space, thereby improving the assembly accuracy of each part inside the rocket engine.

[0059] By designing the handle 10 to have a bent portion with an obtuse angle in the positive projection in the first plane, when the wrench head 20 is sleeved around the bolt or nut, and after the torque wrench is sleeved with the connecting portion 30, the length of the force arm of the wrench component is increased compared with the length of the force arm of the traditional wrench, so that the force applied by the operator on the torque wrench is reduced, which is more convenient for the operator to apply torque in a narrow space.

[0060] In summary, the beneficial technical effects brought by the technical solution provided by the embodiment of the present application include: a bent portion 123 with an obtuse angle is provided at the second segment 12 of the handle 10, so that the projection of the second segment 12 in the first plane presents an approximately L-shaped structure, and the projections of the first segment 11 and the second segment 12 in the second plane present an S-shaped structure. The handle 10 as a whole is a combination of an S-shaped structure and an L-shaped structure located in two mutually perpendicular planes, making the shape and size of the handle 10 smaller and more convenient to bypass obstacles in a narrow space to reach the target bolt or nut, and facilitating a better operation angle in a narrow space. The wrench component of the present application is provided with a connecting portion 30 for sleeving with the torque wrench at one end of the handle 10 away from the wrench head 20, which is convenient for combining with the torque wrench, thereby facilitating accurate application of torque in a narrow space.

[0061] By designing that the geometric center of the connecting portion 30 and the geometric center of the wrench head 20 are in the same plane and parallel to the first plane, when the torque wrench is combined with the connecting portion 30, the plane where the geometric center of the connecting portion 30 and the geometric center of the wrench head 20 are located is parallel to the plane where the torque wrench is located, which is convenient for the torque wrench to accurately apply torque.

[0062] By designing that the lower surface of the wrench head 20 is flush with the lower surface of the first segment 11 and both are parallel to the first plane, when applying torque to the nut or bolt, the lower surface of the first segment 11 can be abutted against a horizontal surface of the workpiece, which can ensure that there is no angle between the wrench head 20 and the bolt or nut in the horizontal direction, and avoid slipping of the wrench head 20 during the screwing process, thereby being beneficial to improving the accuracy of torque application.

[0063] By designing the included angle of the bent portion 123 of the handle 10 to be an obtuse angle, and as the included angle of the bent portion 123 increases, the force arm of the wrench member also gradually increases, so that the torque applied by the operator to the torque wrench (or the wrench member) can be reduced, making it more convenient for the operator to apply force and facilitating the precise application of torque in a narrow space.

[0064] In the description of the present application, the directions or positional relationships indicated by the words "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are the exemplary directions or positional relationships based on the drawings, which are for the convenience of describing or simplifying the embodiments of the present application, rather than indicating or implying that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0065] The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0066] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any one or more embodiments or examples in a suitable manner.

[0067] The above are only some embodiments of the present application. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical concept of the solution of the present application, other similar implementation means based on the technical idea of the present application also belong to the protection scope of the embodiments of the present application.

Claims

1. A wrench component, characterized in that: include: The handle has a bend in its orthographic projection on the first plane; A wrench head, disposed at the first end of the handle, for engaging with a bolt or a nut; The connecting portion is arranged above the second end of the handle, and the orthographic projection of the outer surface in the first plane includes a regular polygon for the wrench head of the torque wrench to fit over; the first plane is parallel to the surface of the handle away from the connecting portion.

2. The wrench member according to claim 1, characterized in that: The handle includes a first section and a second section, the wrench head is arranged at the end of the first section away from the second section, the projection of the handle in the second plane is S-shaped, the lower surface of the first section is higher than the lower surface of the second section, the connecting portion is arranged on the upper surface of the second section, and the second plane is perpendicular to the first plane; the plane where the geometric center of the connecting portion and the geometric center of the wrench head are located is parallel to the lower surface of the second section.

3. The wrench member according to claim 2, characterized in that: The lower surface of the first section is parallel to the first plane, and the lower surface of the wrench head and the lower surface of the first section are located in the same plane.

4. The wrench member according to claim 2, characterized in that: The lower surface of the first section is parallel to the lower surface of the second section, an arc section is provided between the first section and the second section, and the first section, the arc section and the second section are integrally formed.

5. The wrench member according to claim 4, characterized in that: The second section includes a first segment and a second segment. The bending part is formed between the first segment and the second segment in the first plane with a smooth transition. The first segment, the arc segment and the positive projection of the first segment in the first plane extend continuously.

6. The wrench member according to claim 5, characterized in that: The projection of the connecting portion in the first plane is a regular hexagon, and each side surface of the connecting portion is perpendicular to the first plane, and two parallel side surfaces of the connecting portion are perpendicular to an extension line of the second segment.

7. The wrench member according to claim 6, characterized in that: One end of the second segment away from the first segment partially extends outward relative to the connecting portion.

8. The wrench member according to claim 1, characterized in that: Include at least one of the following: The included angle of the bending part of the handle is an obtuse angle, and the length of the force arm of the wrench component is proportional to the included angle of the bending part. The wrench head is a plum head having at least six inner angles; The handle and the wrench head are integrally formed; The connecting portion is welded to the handle.

9. A wrench assembly, characterized in that: It comprises a torque wrench and a wrench component as claimed in any one of claims 1 to 8; the torque wrench is constructed to fit around the periphery of the connecting portion of the wrench component when the wrench head fits around the periphery of a bolt or a nut.

10. The wrench assembly according to claim 9, characterized in that The handle of the wrench member includes a first section and a second section, the second section includes a first subsection and a second subsection, the orthographic projections of the first subsection and the second subsection in the first plane form a bend with an obtuse angle, and the arm length of the wrench member is proportional to the angle of the bend; The torque wrench and the orthographic projection of the second segment in the first plane extend continuously, and the reading of the torque wrench is inversely proportional to the length of the lever arm of the wrench component.

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