CN220689989U

CN220689989U - Detection tool

Info

Publication number: CN220689989U
Application number: CN202322212216.1U
Authority: CN
Inventors: 杨旭; 黄陆鑫; 张军; 刘正仓; 芦伟峰; 王丽; 叶欣; 董辉
Original assignee: Saiwo Zhizao Shanghai Technology Co Ltd
Current assignee: Saiwo Zhizao Shanghai Technology Co Ltd
Priority date: 2023-08-17
Filing date: 2023-08-17
Publication date: 2024-03-29
Anticipated expiration: 2033-08-17

Abstract

The utility model discloses a detection tool which comprises a bottom plate, a first fixed block, a second fixed block, a first positioning rod, a second positioning rod, a fixed block of a pushing rod and a pushing rod, wherein the first fixed block and the second fixed block are connected to the upper end of the bottom plate and are distributed front and back, and the first positioning rod and the second positioning rod are distributed front and back in parallel; the first positioning rod transversely extends left and right and is fixedly connected with the first fixed block; two sliding grooves are formed in the second fixing block, and two ends of the second positioning rod are respectively arranged in one sliding groove; the pushing rod extends towards the two side walls of the positioning rod, and the pushing rod can lock the relative position of the two positioning rods and the sliding groove after pushing towards the two side walls of the positioning rod; the side wall of the first positioning rod facing the second direction of the positioning rod and the side wall of the second positioning rod facing the first direction of the positioning rod are both in convex arc curved surface structures. The utility model can be used for detecting the detected piece of the circular arc saddle with the two ends connected with the circular arc saddle which is concave towards the pipe body direction and has a circular arc curved surface structure, and detecting whether the center distance between the two circular arc saddles is parallel or not.

Description

Detection tool

Technical Field

The utility model relates to the technical field of detection of oil pipe spare and accessory parts, in particular to a detection tool.

Background

At present, in a new energy motor, the space of a motor oil pipe is smaller, the requirement on installation precision is higher, and the oil pipe is connected by virtue of a large arc bent pipe assembly, so that whether the machining precision of the large arc bent pipe assembly accurately influences the subsequent installation precision. As shown in fig. 1, a schematic structural diagram of a large arc elbow assembly is shown, the large arc elbow assembly generally includes a large arc elbow A1 with large arc shape, a plurality of holes A4 are punched on a pipe body of the large arc elbow A1, two ends of the large arc elbow A1 are respectively connected with an arc saddle (as shown in fig. 1) with an arc curved surface structure concave towards the pipe body direction of the large arc elbow A1, namely a left arc saddle A2 and a right arc saddle A3, and the structural sizes of the left arc saddle A2 and the right arc saddle A3 are the same; the large arc bent pipe A1, the left arc saddle A2 and the right arc saddle A3 are combined to form a large arc bent pipe assembly.

The large arc bent pipe A1 is formed by stamping a distribution pipe and takes on a large arc shape. The large arc bent pipe A1 and the two arc saddles are standard parts for processing and forming; when two circular arc saddles and the large circular arc bent pipe A1 are welded to form a large circular arc bent pipe assembly shown in FIG. 1, relevant data (such as whether the center distance between the two circular arc saddles accords with a preset standard or not and whether the two circular arc saddles are parallel or not) of the large circular arc bent pipe assembly is required to be detected after welding is finished, and the problem that installation accuracy is affected due to inaccurate relevant dimensional accuracy in subsequent procedures is avoided.

At present, the size detection of a single part of the large arc bent pipe assembly is carried out by using a three-coordinate measuring machine, but the three-coordinate measuring machine has higher cost, and has higher requirement on environment during detection and is carried out in a laboratory.

Therefore, it is necessary to develop a detection tool with a relatively simple structure and relatively low cost.

Disclosure of Invention

Technical problem to be solved

The utility model aims to provide a detection tool, which solves the problem of higher cost caused by adopting a three-coordinate measuring machine to detect the size of a large arc bent pipe assembly in the prior art. The detection tool is relatively simple in structure and convenient to detect, and the detection tool is used for detecting the large-arc bent pipe assembly, so that the cost is lower.

Technical proposal

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the detection tool comprises a detected piece body, wherein two ends of the detected piece body are respectively connected with an inward-concave arc saddle with an arc curved surface structure, and the detection tool comprises a bottom plate, a first fixing block and a second fixing block which are fixed at the upper end of the bottom plate and are distributed front and back, a first positioning rod, a second positioning rod, a pressing rod fixing block and a pressing rod;

the first positioning rod and the second positioning rod are distributed in parallel front and back; the first positioning rod is fixedly connected with the first fixed block; two sliding grooves are formed in the second fixing block, and two ends of the second positioning rod are respectively arranged in one sliding groove; the pushing rod is in threaded connection with the pushing rod fixing block, and extends towards the two side walls of the positioning rod; the pushing rod can lock the relative position of the second positioning rod and the sliding groove after pushing towards the second side wall of the positioning rod;

the side wall of the first positioning rod facing the second positioning rod and the side wall of the second positioning rod facing the first positioning rod are of convex arc curved surface structures.

Further, the first positioning rod and the second positioning rod extend transversely left and right.

Further, the first positioning rod and the second positioning rod are both cylinders.

Further, the sliding groove is communicated left and right.

Further, the left side and the right side of the positioning rod II are respectively provided with an end limiting component; each end limiting assembly comprises a fixing block III and an end limiting rod, the fixing block III is fixedly connected to the upper end of the bottom plate, meanwhile, the end limiting rods are in threaded connection with the fixing block III, and the end limiting rods extend towards the end portions of the positioning rods II.

Further, the detected piece further comprises a support plate, and the detected piece body is an arc bent pipe; a detection station is arranged between the first positioning rod and the second positioning rod;

one side of the detection station is provided with a support plate side stop block, and the left side and the right side of the support plate side stop block are also provided with a first side pushing component for pushing the support plate towards the side wall of the support plate side stop block and a second side pushing component for pushing the arc bent pipe towards the support plate.

Further, the side pushing component I comprises a sleeve I and a side pressing connecting rod I, wherein the left end and the right end of the sleeve I are communicated; the side pressure connecting rod I comprises a pressing rod I, a middle connecting rod I and a side pushing rod I, and the middle connecting rod I is arranged in an inner cavity of the sleeve I; the first pressing rod is connected with the wall of the first sleeve through a first pin shaft, one end of the first pressing rod is located outside the first sleeve, the other end of the first pressing rod is hinged with one end of the first intermediate connecting rod through a second pin shaft, the other end of the first intermediate connecting rod is hinged with one end of the first side pushing rod through a third pin shaft, the other end of the first side pushing rod is a pushing end I extending towards the direction of the detection station, and the pushing end I is located outside the first sleeve.

Further, the second side pushing component comprises a second sleeve and a second side pressing connecting rod, wherein the left end and the right end of the second sleeve are communicated; the second side pressure connecting rod comprises a second compression rod, a second middle connecting rod and a second side pushing rod, and the second middle connecting rod is arranged in the inner cavity of the second sleeve; the second compression bar is connected with the wall of the second sleeve through a fourth pin shaft, one end of the second compression bar is positioned outside the sleeve, the other end of the second compression bar is hinged with one end of the second intermediate connecting rod through a fifth pin shaft, the other end of the second intermediate connecting rod is hinged with one end of the second side pushing rod through a sixth pin shaft, the other end of the second side pushing rod is a second pushing end extending towards the direction of the detection station, and the second pushing end is positioned outside the sleeve;

a second side jacking block, a spring and a movable bolt are additionally arranged in the second side pushing component; a slot is arranged in the pushing end II, and a notch of the slot is positioned at one side of the pushing end II, which is close to the detection station; one end of the movable bolt is inserted into the slot and is in sliding connection with the second side push rod, and the other end of the movable bolt is fixedly connected with the second side push block; the spring is sleeved outside the movable bolt and is positioned between the second side jacking block and the pushing end II.

Further, the side wall of the arc bent pipe is also provided with a hole; locating pin assemblies are also arranged on the left side and/or the right side of the detection station; the positioning pin assembly comprises a detection pin capable of moving left and right transversely and a detection pin limiting block; the detection pin limiting block is fixedly connected to the upper end of the bottom plate, a through hole is formed in the detection pin limiting block, and the detection pin penetrates through the through hole and extends towards the hole direction.

Advantageous effects

Compared with the prior art, the utility model provides a detection tool, which has the following beneficial effects:

when the novel detection device is used for detecting a detected piece, the detected piece can be placed between the first locating rod and the second locating rod, the second locating rod is pushed towards one direction of the first locating rod by the push rod, the detected piece is tightly locked between the first locating rod and the second locating rod, and at the moment, the concave arc curved surfaces of the two arc saddles are respectively clung to the outer convex arc curved surface side wall of the first locating rod and the outer convex arc curved surface side wall of the second locating rod.

Because the distance between the first positioning rod and the second positioning rod, the shape radian of the side wall of the convex arc-shaped curved surface, the center distance between the side walls of the convex arc-shaped curved surfaces after the pushing rod pushes the second positioning rod and other data are preset according to the standard assembly, after the detected piece is tightly locked between the first positioning rod and the second positioning rod, whether the center distance between the two arc saddles accords with the preset standard can be judged by observing the degree of fit and the size of the gap between the left arc saddle and the second positioning rod and between the left arc saddle and the second positioning rod.

Meanwhile, the first positioning rod and the second positioning rod are distributed in parallel front and back, and whether the two circular arc saddles are parallel or not can be judged by observing the degree of fit and the size of a gap between the left circular arc saddle, the right circular arc saddle, the first positioning rod and the second positioning rod.

Drawings

FIG. 1 is a schematic view of a large arc elbow assembly.

Fig. 2 is a schematic structural view of the bracket plate and large arc elbow assembly after welding.

Fig. 3 is a schematic structural diagram of a detection tool in the present utility model.

Fig. 4 is a schematic perspective view of a side pushing assembly according to the present utility model.

Fig. 5 is a bottom view of a second side push assembly of the present utility model.

Fig. 6 is a side view of a second side push assembly of the present utility model.

Fig. 7 is a schematic view of a second side pushing assembly with the spring removed from fig. 6.

In the figure:

the device comprises an A1-large arc bent pipe, an A2-left arc saddle, an A3-right arc saddle, an A4-hole and an A5-support plate;

the device comprises a first 10-fixing block, a first 11-positioning rod, a second 20-fixing block, a second 21-positioning rod, a left 22-sliding chute, a right 23-sliding chute, a left 24-protruding end, a right 25-protruding end, a fixed 26-pushing rod and a 27-pushing rod;

30-sleeve I, 31-compression bar I, 32-middle connecting rod I, 33-side push rod I, 34-push end I, 35-pin I, 36-pin II and 37-pin III;

40-fixing blocks III, 41-end limiting rods, 50-detection pin limiting blocks and 51-detection pins;

60-sleeve II, 61-compression bar II, 62-intermediate connection rod II, 63-side push rod II, 64-pushing end II, 65-pin IV, 66-pin V, 67-pin V, 68-spring, 69-side top block II, 70-movable bolt, 80-fixed block IV, 90-fixed block V and 100-base plate.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 3, the present utility model provides a detection tool, which includes a base plate 100, a first fixing block 10 and a second fixing block 20 fixed at the upper end of the base plate 100 and distributed back and forth, a first positioning rod 11 and a second positioning rod 21 distributed back and forth in parallel, a pressing rod fixing block 26 and a pressing rod 27.

As shown in fig. 3, the first positioning rod 11 extends laterally from side to side, and the first positioning rod 11 is fixed to the first fixing block 10. In the embodiment, two ends of the first positioning rod 11 are fixedly connected with two raised ends at the upper end of the first fixing block 10 respectively; the upper end of the second fixing block 20 is two protruding ends, namely a left protruding end 24 and a right protruding end 25, the left protruding end 24 is provided with a left chute 22, the right protruding end 25 is provided with a right chute 23, and two ends of the second positioning rod 21 are respectively arranged in the left chute 22 and the right chute 23. The second positioning rod 21 can slide back and forth along the left chute 22 and the right chute 23, and the second positioning rod 21 extends laterally left and right while being distributed in parallel with the first positioning rod 11 back and forth.

As shown in fig. 3, in the present embodiment, the first fixing block 10 and the second fixing block 20 are fixed on the bottom plate 100, and the first fixing block 10 and the second fixing block 20 are disposed in front of and behind each other. In this embodiment, the first positioning rod 11 and the second positioning rod 21 are both cylinders extending transversely, i.e. the side wall of the first positioning rod 11 facing the second positioning rod 21 and the side wall of the second positioning rod 21 facing the first positioning rod 11 are both cylindrical side surfaces, i.e. an arc curved surface structure protruding outwards. Meanwhile, the cylindrical positioning rod II 21 can better move back and forth in the two sliding grooves.

In this embodiment, the left chute 22 and the right chute 23 are both of a left-right two-end penetrating structure, and when the positioning rod two 21 slides back and forth relative to the left chute 22 and the right chute 23, the left and right two end surfaces of the positioning rod two 21 are not blocked and friction is not generated between any end surfaces, so that the back and forth movement can be better realized. Meanwhile, an operator can also observe the relative positions between the two ends of the positioning rod II 21 and the two sliding grooves from the side well.

Meanwhile, the pushing rod 27 is located at one side of the second positioning rod 21, the pushing rod 27 is in threaded connection with the pushing rod fixing block 26, and the pushing rod 27 extends towards the side wall of the second positioning rod 21. When the detection tool is used for detecting the detected piece, namely the large arc bent pipe assembly shown in fig. 1, a detection station for placing the detected piece is arranged between the first positioning rod 11 and the second positioning rod 21, after the large arc bent pipe assembly is placed between the first positioning rod 11 and the second positioning rod 21, the pushing rod 27 pushes the second positioning rod 21 towards the side wall of the second positioning rod 21, and the second positioning rod 21 is pushed towards the first positioning rod 11 until the large arc bent pipe assembly is tightly locked between the first positioning rod 11 and the second positioning rod 21.

The detected piece comprises a detected piece body, and two ends of the detected piece body are respectively connected with an inward concave arc saddle with an arc curved surface structure. In this embodiment, the large arc elbow assembly is a detected member, as shown in fig. 1, where the large arc elbow A1 is a detected member body. Preferably, the detected piece body can also be a straight pipe or a bar, etc.

When the large arc elbow assembly is locked between the first positioning rod 11 and the second positioning rod 21, the right arc saddle A3 and the left arc saddle A2 are respectively attached to the side wall of the first positioning rod 11 and the side wall of the second positioning rod 21. Because the data such as the distance between the first positioning rod 11 and the second positioning rod 21, the height difference, the diameter of the first positioning rod 11, the diameter of the second positioning rod 21 and the like are designed in advance according to specific detection standard products, after the large arc bent pipe assembly is tightly locked between the first positioning rod 11 and the second positioning rod 21, whether the center distance between the two arc saddles meets the preset standard can be judged by observing the degree of fit, the gap size and the like between the left arc saddle and the right arc saddle and between the first positioning rod 11 and the second positioning rod 21.

In this embodiment, the front end of the push rod 27 extends toward the second positioning rod 21. The rear end of the pushing rod 27 is in threaded connection with the pushing rod fixing block 26, so that the purpose of extending and retracting the pushing rod 27 forwards and backwards is achieved. The pressing rod fixing block 26 is fixedly connected to the side wall of the second fixing block 20.

Meanwhile, in order to further prevent the second positioning rod 21 from moving left and right, in this embodiment, an end limiting assembly is added to the outer sides of the left and right ends of the second positioning rod 21, and each end limiting assembly includes a third fixing block 40 and an end limiting rod 41. The third fixing block 40 is fixedly connected to the upper end of the bottom plate 100, meanwhile, the end limiting rod 41 is in threaded connection with the third fixing block 40, and the end limiting rod 41 extends towards the end of the second positioning rod 21. After the large arc elbow assembly is locked between the first positioning rod 11 and the second positioning rod 21, the end limiting rods 41 in the two end limiting assemblies are screwed to enable the front ends of the two end limiting rods 41 to extend and move towards the left end and the right end of the second positioning rod 21 respectively until the two end limiting rods 41 lock the second positioning rod 21 tightly, so that the position of the second positioning rod 21 can be further limited and prevented from being deviated.

After the detection is finished, the pushing rod 27 and the two end limiting rods 41 are reset and moved, and then the positioning rod two 21 is manually reset and moved away from the large arc elbow assembly along the two sliding grooves in a reverse direction.

Meanwhile, as shown in fig. 3, a pipe body hole detection unit is further arranged between the first positioning rod 11 and the second positioning rod 21, the pipe body hole detection unit comprises two positioning pin assemblies, the two positioning pin assemblies are respectively positioned at the left side and the right side of the large arc bent pipe A1, and each positioning pin assembly comprises a detection pin 51 and a detection pin limiting block 50 which can transversely move. In this embodiment, the detection pin limiting block 50 is fixedly connected to the upper end of the bottom plate 100, a hole is provided on the detection pin limiting block 50, and the front end of the detection pin 51 extends toward the large arc elbow A1 through the hole. After the large arc elbow assembly is locked between the first positioning rod 11 and the second positioning rod 21, the detection pin 51 is pushed towards the large arc elbow A1, and as the height of the detection pin 51 is locked, the extending direction of the detection pin 51 and the size of the front end of the detection pin 51 are determined, after the front end of the detection pin 51 is inserted into the hole A4 on the pipe body of the large arc elbow A1, whether the hole profile and the hole diameter of the hole A4 meet the requirements can be judged by observing the matching degree between the front end of the detection pin 51 and the hole A4, the gap between the front end of the detection pin 51 and the hole A4, and the like.

Meanwhile, in the subsequent processing procedure, the large arc elbow assembly needs to be welded with the support plate A5, and finally the assembly shown in fig. 2 is formed. Before the large arc elbow assembly and the support plate A5 are welded, whether the welding end surfaces between the support plate A5 and the large arc elbow A1 are matched or not can be detected in advance. For this reason, we add bracket plate side stop block (not shown in the drawing), side pushing component one and side pushing component two in this detection frock, and at this moment, the piece that is detected includes major arc return bend sub-assembly and bracket plate.

As shown in fig. 3, the first side pushing component is located at the left side of the large arc elbow A1, and the second side pushing component is located at the right side of the large arc elbow A1. The support plate side stop block is positioned between the side pushing component I and the large arc bent pipe A1.

The side pushing component I is used for pushing the support plate A5 towards the support plate side stop block, so that the support plate A5 is tightly locked between the side pushing component I and the support plate side stop block. Specifically, as shown in fig. 4, the first side pressing assembly comprises a first sleeve 30 with two ends penetrating left and right and a first side pressing connecting rod; the side pressure connecting rod I comprises a pressing rod I31, a middle connecting rod I32 and a side pushing rod I33, and the middle connecting rod I32 is arranged in the inner cavity of the sleeve I30; the first compression bar 31 is connected with the wall of the first sleeve 30 through a first pin shaft 35, one end of the first compression bar 31 is positioned outside the first sleeve 30, the other end of the first compression bar 31 is hinged with one end of the first intermediate connecting rod 32 through a second pin shaft 36, the other end of the first intermediate connecting rod 32 is hinged with one end of the first side pushing rod 33 through a third pin shaft 37, the other end of the first side pushing rod 33 is a first pushing end 34 extending towards the direction of the detection station, and the first pushing end 34 is positioned outside the first sleeve 30 and close to one side of the large arc bent pipe A1. Meanwhile, the first sleeve 30 is fixedly connected to the upper end of the bottom plate 100 through the fourth fixing block 80.

When the end of the first pressing rod 31 outside the first sleeve 30 is manually pushed downward by an operator, the first intermediate link 32 rotates to push the first side pushing rod 33 to move toward the detection station, so that the first pushing end 34 is pushed toward the detection station. Correspondingly, when the end of the first compression rod 31 outside the first sleeve 30 is reset upwards, the first intermediate link 32 is driven to rotate reversely, and the first pushing end 34 is pulled back towards the first sleeve 30. When the first presser 31, the first intermediate link 32 and the first side presser 33 are in the same straight line, the first pressing end 34 is pushed to the limit position.

In operation, the support plate A5 is placed on the upper end of the support plate side stop, one end of the support plate A5 is abutted against the large arc elbow A1, and the pushing end one 34 is pressed from left to right towards the left side wall of the support plate A5, as shown in fig. 3, and the left side of the support plate A5 is locked between the side pushing assembly one and the support plate side stop.

The second side pushing component is used for pushing the large arc bent pipe A1 from the right side towards the support plate A5 after the support plate A5 is tightly locked between the first side pushing component and the support plate side stop block, so that the welding end face of the support plate A5 is tightly attached to the side wall of the large arc bent pipe A1. After the welding end face of the support plate A5 is clung to the pipe wall of the large arc bent pipe A1, the fit clearance between the support plate A5 and the side wall of the large arc bent pipe A1 can be detected by observing or using a feeler gauge. If the fit clearance between the support plate A5 and the side wall of the large arc bent pipe A1 meets the requirement, the support plate A5 and the large arc bent pipe A1 can be well welded and connected in the subsequent welding process, so that the structure shown in FIG. 2 is formed.

In this embodiment, the structure of the second side pressing assembly is shown in fig. 5-7. Specifically, the side pushing component II comprises a sleeve II 60 and a side pressing connecting rod II, wherein the left end and the right end of the sleeve II are communicated; the second side pressure connecting rod comprises a second compression rod 61, a second middle connecting rod 62 and a second side pushing rod 63, and the second middle connecting rod 62 is arranged in the inner cavity of the second sleeve 60; the second compression bar 61 is connected with the wall of the second sleeve 60 through a fourth pin 65, one end of the second compression bar 61 is located outside the second sleeve 60, the other end of the second compression bar 61 is hinged with one end of the second intermediate link 62 through a fifth pin 66, the other end of the second intermediate link 62 is hinged with one end of the second side push bar 63 through a sixth pin 67, the other end of the second side push bar 63 is a second pushing end 64 extending towards the direction of the detection station, and the second pushing end 64 is located outside the second sleeve 60. Meanwhile, the second sleeve 60 is fixedly connected to the upper end of the bottom plate 100 through a fifth fixing block 90.

The connection structure between the second sleeve 60 and the second side pressure link may also refer to the connection structure between the first sleeve 30 and the first side pressure link, i.e. refer to the schematic structural diagram of fig. 4.

Meanwhile, unlike the first side pushing assembly, a second side pushing block 69, a spring 68 and a movable bolt 70 are further added in the second side pushing assembly. The pushing end II 64 is internally provided with a slot, the slot opening of the slot is positioned at one side of the pushing end II 64 close to the detection station, one end of the bolt 70 is inserted into the slot and is in sliding connection with the pushing end II 64, the other end of the movable bolt 70 is fixedly connected with the side pushing block II 69, the side pushing block II 69 is positioned at one side of the large arc bent pipe A1, and the spring 68 is sleeved outside the movable bolt 70 and is positioned between the side pushing block II 69 and the pushing end II 64.

In operation, when the first side pushing assembly presses the support plate A5 leftwards towards the side wall of the side stop block of the support plate, the second side pushing block 69 is manually made to be close to the side wall of the large arc elbow a, one end of the second pressing rod 61 is manually pressed down, the second pushing end 64 is pushed leftwards towards the large arc elbow A1, the second pushing end 64 is pushed to push the spring 68, the spring 68 is used for pushing the second side pushing block 69 towards the side wall of the large arc elbow A1, pushing the large arc elbow A1 leftwards towards the support plate A5, and the large arc elbow A1 is finally clung to the welding end face on the right side of the support plate A5, and at this time, the spring 68 is in a contracted state and is located between the second side pushing block 69 and the second pushing end 64. Because of the spring 68, the acting force of the second side top block 69 pressing against the side wall of the large arc elbow A1 is relatively mild, so that the large arc elbow A can be pushed against the support plate A5, and damage, such as friction damage and the like, caused by overlarge pushing force to the large arc elbow A or the support plate A5 can be avoided.

In addition, a side top block one similar to the side top block two 69 can be fixedly connected to the front end of the pushing end one 34, and the side surface of the side top block one is larger than the side surface of the pushing end one 34 so as to increase the contact area with the support plate A5.

Claims

1. Detect frock, by the detection spare including by the detection spare body, the both ends of detecting the spare body are connected with the circular arc saddle that is circular arc curved surface structure of indent respectively, its characterized in that: the detection tool comprises a bottom plate, a first fixed block, a second fixed block, a first positioning rod, a second positioning rod, a fixed block of a pushing rod and a pushing rod, wherein the first fixed block and the second fixed block are fixed at the upper end of the bottom plate and are distributed front and back;

2. The detection tool according to claim 1, wherein: the first positioning rod and the second positioning rod extend transversely left and right.

3. The detection tool according to claim 2, wherein: the first positioning rod and the second positioning rod are both cylinders.

4. A detection tool according to claim 3, wherein: the sliding groove is communicated left and right.

5. The detection tool according to claim 4, wherein: the left side and the right side of the positioning rod II are respectively provided with an end limiting component; each end limiting assembly comprises a fixing block III and an end limiting rod, the fixing block III is fixedly connected to the upper end of the bottom plate, meanwhile, the end limiting rods are in threaded connection with the fixing block III, and the end limiting rods extend towards the end portions of the positioning rods II.

6. A detection tool according to any one of claims 1-5, wherein: the detected piece further comprises a support plate, and the detected piece body is an arc bent pipe; a detection station is arranged between the first positioning rod and the second positioning rod;

7. The inspection tool of claim 6, wherein: the side pushing component I comprises a sleeve I with two through ends at the left and right and a side pressing connecting rod I; the side pressure connecting rod I comprises a pressing rod I, a middle connecting rod I and a side pushing rod I, and the middle connecting rod I is arranged in an inner cavity of the sleeve I; the first pressing rod is connected with the wall of the first sleeve through a first pin shaft, one end of the first pressing rod is located outside the first sleeve, the other end of the first pressing rod is hinged with one end of the first intermediate connecting rod through a second pin shaft, the other end of the first intermediate connecting rod is hinged with one end of the first side pushing rod through a third pin shaft, the other end of the first side pushing rod is a pushing end I extending towards the direction of the detection station, and the pushing end I is located outside the first sleeve.

8. The inspection tool of claim 7, wherein: the side pushing component II comprises a sleeve II and a side pressing connecting rod II, wherein the left end and the right end of the sleeve II are communicated; the second side pressure connecting rod comprises a second compression rod, a second middle connecting rod and a second side pushing rod, and the second middle connecting rod is arranged in the inner cavity of the second sleeve; the second compression bar is connected with the wall of the second sleeve through a fourth pin shaft, one end of the second compression bar is positioned outside the sleeve, the other end of the second compression bar is hinged with one end of the second intermediate connecting rod through a fifth pin shaft, the other end of the second intermediate connecting rod is hinged with one end of the second side pushing rod through a sixth pin shaft, the other end of the second side pushing rod is a second pushing end extending towards the direction of the detection station, and the second pushing end is positioned outside the sleeve;

9. The inspection tool of claim 8, wherein: the side wall of the arc bent pipe is also provided with a hole; locating pin assemblies are also arranged on the left side and/or the right side of the detection station; the positioning pin assembly comprises a detection pin capable of moving left and right transversely and a detection pin limiting block; the detection pin limiting block is fixedly connected to the upper end of the bottom plate, a through hole is formed in the detection pin limiting block, and the detection pin penetrates through the through hole and extends towards the hole direction.