Fixture for straightness detection and straightness detection device

Abstract

The embodiment of the invention relates to the technical field of straightness, and discloses a straightness detection tool and a straightness detection device.The straightness detection tool comprises a workbench, a fixed center assembly and a movable center assembly, in the using process, a to-be-detected workpiece can be arranged between the fixed center assembly and the movable center assembly, and the to-be-detected workpiece can be fixed through the fixed center assembly and the movable center assembly; when the straightness of the workpiece to be detected is detected, one end of the workpiece to be detected abuts against the first tip, and then the position of the second tip is adjusted through the adjusting unit, so that the second tip moves towards the direction close to the workpiece to be detected until the second tip abuts against the workpiece to be detected. As the contact surfaces between the first tip and the second tip and the to-be-detected piece are small, the to-be-detected piece can be rotated, so that different wall surfaces of the to-be-detected piece can face the detection piece, the straightness of the different wall surfaces of the to-be-detected piece can be detected only by rotating the to-be-detected piece, and the detection efficiency can be improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of straightness technology, and in particular to a straightness detection tool and a straightness detection device. Background Art

[0002] Straightness is an indicator that describes the degree of deviation of an object's surface or axis from a reference line. It is a very important parameter in industrial production and is directly related to the quality and use effect of the product.

[0003] The existing straightness detection device has a single detection direction. When the workpiece needs to be detected at multiple angles or directions, the workpiece needs to be frequently positioned, which affects the detection efficiency.

[0004] For example, the patent application with announcement number CN106323201B discloses a straightness detection system, which can only detect the straightness of the inner hole. If the straightness of the outer wall of the workpiece is to be detected, the position of the workpiece needs to be frequently changed, which will affect the detection efficiency. Summary of the invention

[0005] A series of simplified concepts are introduced in the Summary of the Invention, which will be further described in detail in the Detailed Description of the Invention. This part of the invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0007] To this end, a first aspect of the present invention provides a straightness detection tool.

[0008] A second aspect of the present invention provides a straightness detection device.

[0009] In view of this, according to a first aspect of an embodiment of the present application, a straightness detection tool is proposed, comprising: Workbench; A fixed top assembly, the fixed top assembly comprising: a first seat, a first support, a bearing and a first top, the first seat being connected to the workbench, the first support being arranged on the first seat, the bearing being arranged in the first support, one end of the first top being connected to the bearing, and the other end extending out of the first support; A mobile top assembly, the mobile top assembly comprising: a second seat body, a second support, an adjustment unit and a second top, the second seat body is connected to the workbench, the second support is arranged on the second seat body, the adjustment unit passes through the second support and is connected to the second top, the adjustment unit is used to drive the second top to move along the length direction of the workbench, and the second top is arranged opposite to the first top; A slide bar is arranged on one side of the workbench along the length direction of the workbench.

[0010] In a feasible implementation manner, the fixed top assembly further includes: A first end cover and a second end cover, wherein the first end cover and the second end cover are arranged at two ends of the first support; A stabilizing member is connected to the first end cover, and one end of the first tip located in the first support is connected to the stabilizing member.

[0011] In a feasible implementation manner, the fixed top assembly further includes: The first locking member includes: a first adjusting handle and a first abutting rod, the first abutting rod passes through the first support, the first adjusting handle is connected to the first abutting rod, and the first adjusting handle is used to drive the first abutting rod to abut against the first top.

[0012] In a feasible implementation manner, the adjustment unit includes: handle; A lead screw, the handle being connected to the lead screw; Wherein, the second tip includes a threaded portion, and the threaded portion is sleeved on the lead screw.

[0013] In a feasible implementation manner, the mobile top assembly further includes: A twisting piece is sleeved on the second top, and anti-slip grooves are formed on the twisting piece.

[0014] In a feasible implementation manner, the mobile top assembly further includes: The second locking member includes: a second adjusting handle and a second abutting rod, the second abutting rod passes through the second support, the second adjusting handle is connected to the second abutting rod, and the second adjusting handle is used to drive the second abutting rod to abut on the second top.

[0015] In a feasible implementation, the straightness detection tool further includes: A support member is connected to the workbench and arranged between the fixed top assembly and the movable top assembly, and is used to support the workpiece to be inspected.

[0016] In a feasible implementation, the straightness detection tool further includes: A rotary assembly is connected to the workbench and is used to drive the workpiece to be inspected to position.

[0017] In a feasible implementation manner, the rotary assembly includes: A turntable connected to the workbench; A connecting piece, one end of which is connected to the turntable, and the other end of which is used to connect to a workpiece to be inspected; A third locking member is used to lock or unlock the connecting member.

[0018] According to a second aspect of an embodiment of the present application, a straightness detection device is provided, comprising: A straightness detection tool as described in any of the above technical solutions; A seat board, wherein the seat board is slidably connected to the slide bar; A detection member is arranged on the seat plate.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects: The straightness detection tooling provided in the embodiment of the present application includes a workbench, a fixed top assembly and a movable top assembly, wherein the fixed top assembly includes a first seat body, a first support, a bearing and a first top, and the movable top assembly includes a second seat body, a second support, an adjustment unit and a second top. Based on this, during use, the workpiece to be detected can be set between the fixed top assembly and the movable top assembly, one end of the workpiece to be detected is abutted against the first top, and then the position of the second top is adjusted by the adjustment unit so that the second top moves in a direction close to the workpiece to be detected until the second top also abuts against the workpiece to be detected. Based on this, the workpiece to be detected can be abutted and tightened by the first top and the second top to complete the fixation of the workpiece to be detected. When the straightness of the workpiece to be detected is detected, since the contact surface between the first top and the second top and the workpiece to be detected is small, the workpiece to be detected can be rotated so that different wall surfaces of the workpiece to be detected can all face the detection part. It only needs to rotate the workpiece to be detected to realize the straightness detection of different wall surfaces of the workpiece to be detected, without the need for frequent disassembly and assembly of the workpiece to be detected, which can improve the detection efficiency.

[0020] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings: Figure 1 A schematic structural diagram of a straightness detection tooling provided in an embodiment of the present application; Figure 2 A schematic structural diagram of another angle of a straightness detection tooling provided in an embodiment of the present application; Figure 3 for Figure 2 Cross-section view in the AA direction; Figure 4 A schematic structural diagram showing another angle of a straightness detection tooling according to an embodiment of the present application.

[0022] in, Figures 1 to 4 The corresponding relationship between the reference numerals and the component names is as follows: 110 workbench, 120 fixed top assembly, 130 mobile top assembly, 140 support, 150 rotary assembly, 160 lifting ring, 170 slide bar; 121 first seat body, 122 first support seat, 123 bearing, 124 first top, 125 first end cover, 126 second end cover, 127 stabilizing member, 128 first locking member, 129 spacer, 1281 first adjusting handle, 1282 first abutting rod; 131 second seat body, 132 second support, 133 adjustment unit, 134 second top, 135 twisting member, 136 second locking member, 1331 handle, 1332 lead screw, 1361 second adjustment handle, 1362 second abutting rod; 151 a turntable, 152 a connecting member, 153 a third locking member; 210 seat board. DETAILED DESCRIPTION

[0023] In the following description, a large number of specific details are given to provide a more thorough understanding of the technical solutions provided by the present invention. However, it is obvious to those skilled in the art that the technical solutions provided by the present invention can be implemented without one or more of these details.

[0024] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of the features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0025] Now, exemplary embodiments according to the present invention will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in a variety of different forms and should not be interpreted as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided to make the disclosure of the present invention thorough and complete, and to fully convey the concept of these exemplary embodiments to those of ordinary skill in the art.

[0026] like Figures 1 to 4 As shown, according to the first aspect of the embodiment of the present application, a tool for straightness detection is proposed, including: a workbench 110; a fixed top assembly 120, the fixed top assembly 120 includes: a first seat body 121, a first support 122, a bearing 123 and a first top 124, the first seat body 121 is connected to the workbench 110, the first support 122 is arranged on the first seat body 121, the bearing 123 is arranged in the first support 122, one end of the first top 124 is connected to the bearing 123, and the other end extends out of the first support 122; a moving top assembly 130, the moving top assembly Component 130 includes: a second base body 131, a second support 132, an adjustment unit 133 and a second pinnacle 134, the second base body 131 is connected to the workbench 110, the second support 132 is arranged on the second base body 131, the adjustment unit 133 passes through the second support 132 and is connected to the second pinnacle 134, the adjustment unit 133 is used to drive the second pinnacle 134 to move along the length direction of the workbench 110, and the second pinnacle 134 is arranged opposite to the first pinnacle 124; a sliding rod 170, the sliding rod 170 is arranged on one side of the workbench 110 along the length direction of the workbench 110.

[0027] The straightness detection tooling provided in the embodiment of the present application includes a workbench 110, a fixed top assembly 120 and a movable top assembly 130, wherein the fixed top assembly 120 includes a first seat body 121, a first support 122, a bearing 123 and a first top 124, and the movable top assembly 130 includes a second seat body 131, a second support 132, an adjustment unit 133 and a second top 134. Based on this, during use, the workpiece to be detected can be set between the fixed top assembly 120 and the movable top assembly 130, one end of the workpiece to be detected is abutted against the first top 124, and then the position of the second top 134 is adjusted by the adjustment unit 133. The second pin 134 is moved in a direction close to the workpiece to be inspected until the second pin 134 also abuts against the workpiece to be inspected. Based on this, the workpiece to be inspected can be abutted and tightened by the first pin 124 and the second pin 134 to complete the fixation of the workpiece to be inspected. When the straightness of the workpiece to be inspected is detected, since the contact area between the first pin 124 and the second pin 134 and the workpiece to be inspected is small, the workpiece to be inspected can be rotated so that different wall surfaces of the workpiece to be inspected can face the inspection part. The straightness of different wall surfaces of the workpiece to be inspected can be detected by rotating the workpiece to be inspected. There is no need to frequently disassemble and assemble the workpiece to be inspected, which can improve the inspection efficiency.

[0028] It can be understood that the front ends of the first tip 124 and the second tip 134 are both conical. Through the conical design, the contact area between the first tip 124 and the second tip 134 and the workpiece to be inspected is smaller. Therefore, when the workpiece to be inspected is subjected to external force, the workpiece to be inspected can rotate relative to the first tip 124 and the second tip 134.

[0029] It is understandable that, by disposing the first seat body 121 and the second seat body 131 , the height of the fixed top assembly 120 and the movable top assembly 130 can be increased, so that the straightness detection tooling can detect workpieces with a certain height.

[0030] It can be understood that, through the arrangement of the first support 122 and the bearing 123, the first pin 124 can rotate relative to the first support 122, thereby facilitating the rotation of the workpiece to be inspected relative to the workbench 110; at the same time, the arrangement of the bearing 123 can better support the first pin 124 and reduce the probability of the first pin 124 loosening; based on the same principle, the second pin 134 can be better supported by the second support 132.

[0031] It can be understood that, through the setting of the slide bar 170, the detection part for detecting straightness can be connected to the slide bar 170, and the detection part can slide along the length direction of the workbench 110 through the slide bar 170, based on which the straightness of the wall surface of the detection part can be detected.

[0032] In some examples, a lifting ring 160 may be further provided on the peripheral side of the workbench 110 , so as to facilitate the transportation and assembly of the tooling for straightness detection.

[0033] like Figures 1 to 4 As shown, in a feasible embodiment, the fixed tip assembly 120 also includes: a first end cover 125 and a second end cover 126, the first end cover 125 and the second end cover 126 are arranged at both ends of the first support 122; a stabilizing member 127, the stabilizing member 127 is connected to the first end cover 125, and one end of the first tip 124 located in the first support 122 is connected to the stabilizing member 127.

[0034] In this technical solution, the structural composition of a fixed tip assembly 120 is further provided. The fixed tip assembly 120 may also include a first end cover 125 and a second end cover 126. The first support 122 may be encapsulated by the first end cover 125 and the second end cover 126 to facilitate lubrication and sealing of the bearing 123. By arranging a fixing member 127 at the first end cover 125, the fixation of the first tip 124 can be made more reliable, and the probability of the first tip 124 loosening or shaking is further reduced, so that the first tip 124 and the second tip 134 can better fix the workpiece to be inspected.

[0035] like Figures 1 to 4 As shown, in a feasible embodiment, the fixed top assembly 120 also includes: a first locking member 128, the first locking member 128 includes: a first adjusting handle 1281 and a first abutment rod 1282, the first abutment rod 1282 passes through the first support 122, the first adjusting handle 1281 is connected to the first abutment rod 1282, and the first adjusting handle 1281 is used to drive the first abutment rod 1282 to abut on the first top 124.

[0036] In this technical solution, a structural composition of a fixed top assembly 120 is further provided. The fixed top assembly 120 may also include a first locking member 128, and the first locking member 128 may include a first adjusting handle 1281 and a first abutting rod 1282. By setting the first adjusting handle 1281, the length of the first abutting rod 1282 extending into the first support 122 can be adjusted, and then the first adjusting handle 1281 can be used to drive the first abutting rod 1282 to abut against the first top 124. Based on this, the locking of the first top 124 can be completed to prevent the first top 124 from rotating, so that the fixation of the workpiece to be inspected is more reliable.

[0037] In some examples, a spacer sleeve 129 may be disposed inside the first support 122 , and the first abutment rod 1282 passes through the first support 122 and the spacer sleeve 129 , which can improve the sealing effect of the first support 122 and facilitate stable guidance of the first abutment rod 1282 .

[0038] like Figures 1 to 4 As shown, in a feasible implementation manner, the adjustment unit 133 includes: a handle 1331; a screw 1332, and the handle 1331 is connected to the screw 1332; wherein the second tip 134 includes a threaded portion, and the threaded portion is sleeved on the screw 1332.

[0039] In this technical solution, a structural composition of an adjustment unit 133 is further provided. The adjustment unit 133 may include a handle 1331 and a screw 1332, and the second tip 134 includes a threaded portion. Based on this, when the handle 1331 is rotated, the screw 1332 can be driven to rotate, and the screw 1332 then acts together with the threaded portion to drive the second tip 134 to move, thereby facilitating the second tip 134 to abut against the workpiece to be detected.

[0040] like Figures 1 to 4 As shown, in a feasible implementation manner, the movable top assembly 130 further includes: a twisting member 135 , the twisting member 135 is sleeved on the second top 134 , and anti-slip grooves are formed on the twisting member 135 .

[0041] In this technical solution, the structural composition of the movable top assembly 130 is further provided. The movable top assembly 130 may also include a torsion piece 135. The torsion piece 135 is mounted on the second top 134 and is located outside the second support 132. Based on this, after the second top 134 is initially positioned by the adjustment unit 133, a greater friction force can be provided by the anti-slip grooves of the torsion piece 135. Therefore, the second top 134 can be driven by external force to perform fine adjustment of the position, thereby ensuring the abutment effect of the workpiece to be inspected.

[0042] In a feasible embodiment, the movable top assembly 130 also includes: a second locking member 136, the second locking member 136 includes: a second adjustment handle 1361 and a second abutment rod 1362, the second abutment rod 1362 passes through the second support 132, the second adjustment handle 1361 is connected to the second abutment rod 1362, and the second adjustment handle 1361 is used to drive the second abutment rod 1362 to abut on the second top 134.

[0043] In this technical solution, the movable top assembly 130 may also include a second locking member 136, and the second locking member 136 may include a second adjustment handle 1361 and a second abutment rod 1362. The position of the second abutment rod 1362 is adjusted by rotating the second adjustment handle 1361 so that the second abutment rod 1362 can abut against the second top 134, thereby facilitating locking of the second top 134.

[0044] like Figures 1 to 4 As shown, in a feasible implementation, the straightness detection tooling further includes: a support member 140, the support member 140 is connected to the workbench 110, and is arranged between the fixed top assembly 120 and the movable top assembly 130, and the support member 140 is used to support the workpiece to be detected.

[0045] In this technical solution, considering that the two ends of the workpiece to be inspected are respectively tightened against the first pin 124 and the second pin 134, but the middle part of the workpiece to be inspected is prone to the risk of falling, based on this, a support member 140 can be arranged on the workbench 110, and the workpiece to be inspected can be supported by the support member 140, which can reduce the probability of the workpiece to be inspected falling.

[0046] In some examples, there may be a plurality of support members 140 , and each support member 140 may be a support member 140 with adjustable height.

[0047] like Figures 1 to 4 As shown, in a feasible implementation manner, the straightness detection tooling further includes: a rotary assembly 150, which is connected to the workbench 110 and is used to drive the workpiece to be detected to position.

[0048] In this technical solution, the straightness detection tooling may further include a rotary assembly 150. During use, the workpiece to be detected may be first placed on the rotary assembly 150, and then the rotary assembly 150 may be used to drive the workpiece to be detected to be positioned. After the workpiece to be detected is accurately positioned, the workpiece to be detected may be locked by the first center point 124 and the second center point 134. Through the setting of the rotary assembly 150, the positioning of the workpiece to be detected is more convenient, more labor-saving, and easier to adjust the position of the workpiece to be detected.

[0049] like Figures 1 to 4 As shown, in a feasible embodiment, the rotary assembly 150 includes: a turntable 151, which is connected to the workbench 110; a connecting member 152, one end of the connecting member 152 is connected to the turntable 151, and the other end is used to be connected to the workpiece to be inspected; a third locking member 153, which is used to lock or unlock the connecting member 152.

[0050] In this technical solution, a structural composition of a rotating assembly 150 is further provided. The rotating assembly 150 may include a turntable 151, a connecting member 152 and a third locking member 153. Based on this, during use, the workpiece to be inspected can be first placed on the turntable 151, and then connected to the workpiece to be inspected through the connecting member 152. Thereafter, the connecting member 152 is locked by the third locking member 153. The turntable 151 can be used to drive the workpiece to be inspected to rotate and position. After the workpiece to be inspected is positioned in place, the connecting member 152 can be unlocked by the third locking member 153.

[0051] like Figures 1 to 4 As shown, according to the second aspect of the embodiment of the present application, a straightness detection device is proposed, including: a straightness detection tool as in any of the above-mentioned technical solutions; a seat plate 210, the seat plate 210 is slidably connected to the slide rod 170; and a detection member, which is arranged on the seat plate 210.

[0052] The straightness detection device provided in the embodiment of the present application includes a straightness detection tooling as in any of the above-mentioned technical solutions, and therefore the straightness detection device has all the beneficial effects of the straightness detection tooling of the above-mentioned technical solutions.

[0053] The straightness detection device provided in the embodiment of the present application includes a straightness detection tool, a seat plate 210 and a detection piece. During use, the workpiece to be detected can be set between the fixed top assembly 120 and the movable top assembly 130, one end of the workpiece to be detected is abutted against the first top 124, and then the position of the second top 134 is adjusted by the adjustment unit 133, so that the second top 134 moves in a direction close to the workpiece to be detected until the second top 134 also abuts on the workpiece to be detected. Based on this, the workpiece to be detected can be abutted and tightened by the first top 124 and the second top 134 to complete the fixation of the workpiece to be detected. When the straightness of the workpiece to be detected is detected, since the contact surface between the first top 124 and the second top 134 and the workpiece to be detected is small, the workpiece to be detected can be rotated so that different wall surfaces of the workpiece to be detected can all face the detection piece, and through the sliding connection between the seat plate 210 and the slide bar 170, the detection piece can be driven by the seat plate 210 to move along the wall surface of the workpiece to be detected, thereby completing the straightness detection.

[0054] In some examples, the inspection part may include a dial indicator. During the specific inspection process, the dial indicator probe contacts the surface of the inspected part and moves along the axis of the inspected part. The specific inspection process may include measuring the maximum change for inspection, such as multiplying the maximum change of the dial indicator pointer by the amplification ratio of the lever to obtain the desired inner hole generatrix straightness or workpiece surface straightness deviation; straightness can also be obtained through graphical analysis, such as recording the readings at different positions, and calculating or using a graphical method to obtain the generatrix straightness of the long hole, deep blind hole or the straightness distribution of the workpiece surface. The measurement results can also be evaluated, such as evaluating whether the straightness of the workpiece meets the requirements based on the measurement results and the technical requirements of the workpiece.

[0055] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front” and “back” are based on the directions or positional relationships 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 device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0057] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0058] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tool for straightness detection, characterized in that: include: Workbench; A fixed top assembly, the fixed top assembly comprising: a first seat, a first support, a bearing and a first top, the first seat being connected to the workbench, the first support being arranged on the first seat, the bearing being arranged in the first support, one end of the first top being connected to the bearing, and the other end extending out of the first support; A mobile top assembly, the mobile top assembly comprising: a second seat body, a second support, an adjustment unit and a second top, the second seat body is connected to the workbench, the second support is arranged on the second seat body, the adjustment unit passes through the second support and is connected to the second top, the adjustment unit is used to drive the second top to move along the length direction of the workbench, and the second top is arranged opposite to the first top; A slide bar is arranged on one side of the workbench along the length direction of the workbench.

2. The straightness detection tool according to claim 1, characterized in that: The fixed top assembly also includes: A first end cover and a second end cover, wherein the first end cover and the second end cover are arranged at two ends of the first support; A stabilizing member is connected to the first end cover, and one end of the first tip located in the first support is connected to the stabilizing member.

3. The straightness detection tool according to claim 1, characterized in that: The fixed top assembly also includes: The first locking member includes: a first adjusting handle and a first abutting rod, the first abutting rod passes through the first support, the first adjusting handle is connected to the first abutting rod, and the first adjusting handle is used to drive the first abutting rod to abut against the first top.

4. The straightness detection tool according to claim 1, characterized in that: The adjustment unit comprises: handle; A lead screw, the handle being connected to the lead screw; Wherein, the second tip includes a threaded portion, and the threaded portion is sleeved on the lead screw.

5. The straightness detection tool according to claim 1, characterized in that: The mobile top assembly also includes: A twisting piece is sleeved on the second top, and anti-slip grooves are formed on the twisting piece.

6. The straightness detection tool according to claim 1, characterized in that: The mobile top assembly also includes: The second locking member includes: a second adjusting handle and a second abutting rod, the second abutting rod passes through the second support, the second adjusting handle is connected to the second abutting rod, and the second adjusting handle is used to drive the second abutting rod to abut on the second top.

7. The straightness detection tool according to any one of claims 1 to 6, characterized in that: Also includes: A support member is connected to the workbench and arranged between the fixed top assembly and the movable top assembly, and is used to support the workpiece to be inspected.

8. The straightness detection tool according to any one of claims 1 to 6, characterized in that: Also includes: A rotary assembly is connected to the workbench and is used to drive the workpiece to be inspected to position.

9. The straightness detection tool according to claim 8, characterized in that: The rotary assembly comprises: A turntable connected to the workbench; A connecting piece, one end of which is connected to the turntable, and the other end of which is used to connect to a workpiece to be inspected; A third locking member is used to lock or unlock the connecting member.

10. A straightness detection device, characterized in that: include: A straightness detection tool as claimed in any one of claims 1 to 9; A seat board, wherein the seat board is slidably connected to the slide bar; A detection member is arranged on the seat plate.

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