Checking fixture for arc bent pipe without straight line segment

Abstract

The utility model discloses a straight-line-segment-free arc elbow testing fixture which comprises a connecting substrate, and the front end face of the connecting substrate is connected with a detection pin assembly and a positioning assembly which are distributed up and down. The positioning assembly comprises a movable block, a positioning block, a limiting block located on the side face of the movable block, and a first pipe body supporting block, a second pipe body supporting block and a fixing plug pin installation block which are located between the movable block and the positioning block. A transversely telescopic elastic component is arranged between the movable block and the limiting block; the upper end of the first pipe body supporting block and the upper end of the second pipe body supporting block are each provided with a limiting groove. Fixing bolts are arranged at the upper ends of the fixing bolt mounting blocks; positioning jacks are formed in the upper ends of the movable blocks; the detection pin assembly comprises a first movable bolt capable of being inserted into the positioning insertion hole downwards and a second movable bolt located above the position between the movable block and the positioning block. The side wall, facing the positioning block, of the movable block and the side wall, facing the movable block, of the positioning block are each provided with an outer protruding end of an arc curved surface structure. The device is simple in structure and convenient to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of detection of oil pipe parts and accessories, in particular to a circular arc pipe bending inspection tool without a straight line segment. Background Art

[0002] At present, in new energy motors, the motor oil pipe installation space is small and the installation accuracy requirements are high. The oil pipe connection relies on large arc elbow assemblies. Therefore, whether the processing accuracy of large arc elbow assemblies is accurate affects the subsequent installation accuracy. Figure 1 , 2 FIG. 1 is a schematic diagram of the structure of a large arc elbow assembly, which generally includes a large arc elbow A1 in a large arc shape, a plurality of oil holes (such as oil hole 1 A4 and oil hole 2 A5) are provided on the pipe body of the large arc elbow A1, and an arc saddle (such as an arc saddle) with an arc curved surface structure concave inwardly toward the pipe body direction of the large arc elbow A1 is connected to the left and right ends of the large arc elbow A1. Figure 1 As shown in the figure, namely, arc saddle 1 A2 and arc saddle 2 A3, arc saddle 1 A2 and arc saddle 2 A3 have the same structure and size; large arc elbow A1, arc saddle 1 A2 and arc saddle 2 A3 are combined to form a large arc elbow assembly. Oil hole 1 A4 and oil hole 2 A5 are respectively arranged on the left and right side walls of the large arc elbow A1.

[0003] Whether the oil hole 1 A4 and the oil hole 2 A5 are located accurately on the large arc elbow A1 directly affects the assembly and connection between multiple large arc elbow assemblies in the later stage. Therefore, we need to perform data detection on them.

[0004] At present, the dimensional inspection of individual parts of large arc elbow assemblies is carried out using a three-coordinate measuring machine, but the cost of a three-coordinate measuring machine is relatively high and the inspection environment is demanding, so it is mostly carried out in a laboratory. Utility Model Content

[0005] The purpose of the utility model is to provide a non-straight-line arc bend inspection tool to solve the problem of high cost caused by using a three-coordinate measuring machine to detect the size of a large arc bend assembly in the prior art. The utility model provides a relatively simple structure and convenient inspection operation. The inspection tool of the utility model is used to inspect the large arc bend assembly at a lower cost.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A non-straight-segment arc pipe bending inspection tool comprises a connecting substrate, the front end surface of which is connected with a detection pin assembly and a positioning assembly distributed up and down;

[0008] The positioning assembly includes a movable block, a positioning block, a limit block, a first tube body support block, a second tube body support block and a fixed latch installation block;

[0009] The movable block and the positioning block are distributed on the left and right, the limiting block is located on the side of the movable block away from the positioning block, and a transversely retractable elastic component is provided between the movable block and the limiting block;

[0010] The first tube body support block and the second tube body support block are located between the movable block and the positioning block; a limiting groove is provided at the upper end of the first tube body support block and the upper end of the second tube body support block respectively;

[0011] The fixed latch mounting block is located between the movable block and the positioning block, and the upper end of the fixed latch mounting block is provided with a fixed latch extending upward;

[0012] The detection pin assembly includes a movable latch pin 1 and a movable latch pin 2 which can move up and down; the upper end of the movable block is provided with a positioning socket for the movable latch pin 1 to be inserted; the lower end of the movable latch pin 1 is located directly above the positioning socket; the lower end of the movable latch pin 2 is located above the movable block and the positioning block;

[0013] An outer protruding end with an arc curved surface structure is respectively provided on the side wall of the movable block facing the positioning block and on the side wall of the positioning block facing the movable block.

[0014] Furthermore, the fixed pin installation block is located between the first tube body support block and the second tube body support block.

[0015] Furthermore, a blocking portion is provided on one side of the movable block to prevent the movable block from continuing to move toward the positioning block.

[0016] Furthermore, the outer protruding end is in the shape of a side wall of a cylinder as a whole and extends in the longitudinal direction.

[0017] Furthermore, the elastic component is a spring, one end of the spring is connected to the limiting block, and the other end of the spring is connected to the movable block.

[0018] Furthermore, a supporting block is provided at the lower end of the connecting substrate.

[0019] Compared with the prior art, the utility model provides a circular arc pipe bending inspection fixture without straight line segments, which has the following beneficial effects:

[0020] The arc pipe bend inspection tool without straight line segments in the utility model can be used to inspect large arc pipe bend assemblies without straight line segments, and detect whether the position of the oil through hole on the large arc pipe bend assemblies meets the requirements. The structure is simple and the operation is convenient.

[0021] At the same time, in the utility model, the detection pin assembly and the positioning assembly are both arranged on the front end surface of the connection base plate, and are all located within the sight of the operator. During the entire operation process, the operator can quickly and comprehensively observe the entire detection process without moving or excessively turning the head angle. During the operation process, the operating space is directly in front of the operator, and the operator can complete the operation without making a large movement or a large rotation of the head angle, which can reduce the fatigue caused by the operator's frequent movements or large rotation of the head. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of a large arc elbow assembly. Figure 1 .

[0023] Figure 2 This is a schematic diagram of the structure of a large arc elbow assembly. Figure 2 .

[0024] Figure 3 It is a structural schematic diagram of the utility model when the arc pipe bending inspection fixture without straight line segment is in use.

[0025] Figure 4 yes Figure 3 Schematic diagram of the top view structure.

[0026] In the picture:

[0027] A1-large arc elbow, A2-arc saddle one, A3-arc saddle two, A4-oil hole one, A5-oil hole two;

[0028] 100-large arc elbow assembly, 200-connecting base plate, 201-left bracket foot, 202-right bracket foot, 301-movable block, 302-positioning block, 303-limiting block, 304-tube body support block one, 305-tube body support block two, 306-fixing latch, 307-fixing latch mounting block, 308-blocking part, 309-outer protruding end one, 310-outer protruding end two, 311-limiting block side end surface, 401-movable latch one, 402-movable latch two, 403-movable latch mounting seat one. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] like Figure 2-3As shown, the arc pipe bending inspection fixture without straight segments in this embodiment includes a connecting base plate 200, and the front end surface of the connecting base plate 200 is connected with a detection pin assembly and a positioning assembly distributed up and down.

[0031] like Figure 3 As shown, the positioning assembly includes a movable block 301, a positioning block 302, a limit block 303, a tube body support block 1 304, a tube body support block 2 305 and a fixed pin mounting block 307; and a fixed pin 306, i.e. a cylindrical protrusion, is arranged at the upper end of the fixed pin mounting block 307, and the protrusion extends longitudinally.

[0032] The movable block 301 and the positioning block 302 are distributed on the left and right, and the limit block 303 is located on the left side of the movable block 301, that is, away from the side of the positioning block 302; and a transversely retractable elastic component is provided between the movable block 301 and the limit block 303, which can drive the movable block 301 to move laterally. The elastic component in this embodiment is a spring (not shown in the drawings), and the spring is placed in the spring hole built in the limit block 303. The left end of the spring is connected to the limit block 303, and the right end of the spring is connected to the left end face of the movable block 301; at the same time, Figure 3 As shown, a blocking portion 308 is also provided on the right side of the movable block 301 to prevent the movable block 301 from continuing to move toward the positioning block 302. Figure 3 As shown, in this embodiment, the limiting block 303 and the blocking portion 308 are connected to form an integral block. Of course, the two may not be connected but may be two independent components.

[0033] In this embodiment, the distance between the left end of the blocking portion 308 and the side end surface 311 of the limiting block is slightly larger than the width of the movable block 301, and the movable block 301 can move laterally between the blocking portion 308 and the side end surface 311 of the limiting block. When the large arc pipe bending assembly 100 is placed between the movable block 301 and the positioning block 302, the movable block 301 is squeezed and pushed to the left by the end of the large arc pipe bending assembly 100, and the spring contracts; when the large arc pipe bending assembly 100 is taken out from between the movable block 301 and the positioning block 302, the spring extends, automatically pushing the movable block 301 tightly against the left end surface of the blocking portion 308. Through the above structure, the movable block 301 can be moved and its movement range can be controlled. At the same time, due to the presence of the spring, when the large arc pipe bending assembly 100 is placed between the movable block 301 and the positioning block 302, the left end of the large arc pipe bending assembly 100 is subjected to force, and the large arc pipe bending assembly 100 can be locked between the movable block 301 and the positioning block 302. Compared with the method of using a push rod to push the movable block 301, the method in this embodiment is simpler, and there is no need for an operator to operate the push rod, which simplifies the structure and operation steps of the overall inspection fixture.

[0034] like Figure 2As shown, in this embodiment, two tube body support blocks, namely, tube body support block 1 304 and tube body support block 2 305, are further arranged between the movable block 301 and the positioning block 302. An arc-shaped limiting groove for the tube body of the large arc elbow A1 to be inserted is arranged at the upper end of each of the tube body support block 1 304 and the tube body support block 2 305. At the same time, a fixed latch installation block 307 is arranged between the tube body support block 1 304 and the tube body support block 2 305, and a fixed latch 306 is arranged at the upper end of the fixed latch installation block 307.

[0035] like Figure 3 As shown, the limiting groove on the pipe body support block is an arc segment when viewed from a top view. The two limiting grooves and a fixing pin 306 are located on the same arc at the same time, that is, when the large arc elbow A1 is placed in the two limiting grooves at the same time, the fixing pin 306 is inserted from bottom to top into an oil hole A4 on the side wall of the large arc elbow A1.

[0036] like Figure 3 As shown, the right side wall of the movable block 301 (i.e., the side wall of the movable block 301 facing the positioning block 302) is provided with an outer protruding end 1 309 with an arc curved surface structure, and the left side wall of the positioning block 302 (i.e., the side wall of the positioning block 302 facing the movable block 301) is provided with an outer protruding end 2 310 with an arc curved surface structure.

[0037] In this embodiment, the outer protruding end 1 309 and the outer protruding end 2 310 are both in the shape of the side wall of a cylinder as a whole, and extend in the longitudinal direction, corresponding to the concave arc surface structure of the arc saddle. During detection, the convex surface of the outer protruding end 1 309 is in close contact with the concave surface of the arc saddle 1 A2, and the convex surface of the outer protruding end 2 310 is in close contact with the concave surface of the arc saddle 2 A3.

[0038] In this embodiment, the detection pin assembly includes a movable latch 1 401 that can move up and down and a movable latch 2 402 that can move up and down. The movable latch 1 401 and the movable latch 2 402 are respectively connected to the front end surface of the connecting base 200 through a movable latch mounting seat. Figure 3 Preferably, the movable latch 1 401, the movable latch 2 402 and the corresponding movable latch mounting seat can also be arranged to be threadedly connected to achieve controllable adjustment of the upward and downward movement range of the movable latch 1 401 and the movable latch 2 402.

[0039] The lower end of the movable latch 1 401 is located directly above the movable block 301, and can be inserted downward into a positioning socket (not shown in the accompanying drawings) provided at the upper end of the movable block 301; the lower end of the movable latch 2 402 is located above between the movable block 301 and the positioning block 302, and can be inserted downward into another oil hole (i.e., oil hole 2 A5) on the side wall of the large arc elbow A1 during detection.

[0040] At the same time, in this embodiment, a left bracket foot 201 and a right bracket foot 202 are also connected to the lower end of the connecting base plate 200 to support the connecting base plate 200 to a certain height, thereby leaving a space of a certain height below the positioning component, so that when removing the large arc elbow assembly 100, the operator's hand can be inserted into the space below the positioning component, holding the inspected part from top to bottom, and then easily pulling the inspected part up from bottom to top and removing it from the inspection fixture.

[0041] The above-mentioned inspection tool can be used for the inspection operation of the large arc pipe bending assembly 100, which is a circular arc pipe bending component without straight line segments. The operation method is briefly as follows:

[0042] The first step is that the operator grasps the large arc elbow assembly 100 and adjusts its placement angle, with the oil hole A5 facing upward and the oil hole A4 facing downward, and the oil hole A5 located on the right side of the oil hole A4. Then, the operator aligns the left end of the large arc elbow assembly 100 with the outer protruding end 309 to push the movable block 301 to the left, aligns the downward oil hole A4 with the fixed pin 306, and aligns the right end of the large arc elbow assembly 100 with the outer protruding end 310, so that the large arc elbow assembly 100 is placed between the outer protruding end 309 and the outer protruding end 310 at the same time, and then presses downward.

[0043] When the large arc elbow assembly 100 is smoothly pressed down to the lowest point, and is stuck in the two limit grooves and the fixing pin 306 is inserted into the oil hole A4, it is observed that the arc saddle A3 and the outer protruding end 310 are completely fitted together without obvious gaps. Since the cross-sectional size of the fixing pin 306 in this embodiment matches the orifice size of the oil hole A4 (that is, after the fixing pin 306 is inserted into the oil hole A4, it is loosely matched with the oil hole A4 and can freely enter and exit the oil hole A4), and the spacing between the fixing pin 306 and the outer protruding end 310 is fixed, it means that the hole position of the oil hole A4 meets the requirements.

[0044] If the fixing pin 306 cannot be inserted into the oil through hole A4 after being pressed downward, it means that the hole position of the oil through hole A4 does not meet the requirements and the product is unqualified.

[0045] Step 2: If the hole position of the oil hole A4 meets the requirements, we proceed to the next step and continue to push the movable latch 1 401 and the movable latch 2 402 downwards one after another.

[0046] If the movable latch 401 is successfully inserted into the positioning hole at the upper end of the movable block 301, since the cross-sectional size of the lower end of the movable latch 401 in this embodiment matches the hole size of the positioning hole (that is, after the movable latch 401 is inserted into the positioning hole, it fits with the clearance of the positioning hole and can freely enter and exit the positioning hole), and after the movable latch 401 is inserted into the positioning hole, the distance between the outer protrusion end 1 309 and the outer protrusion end 2 310 has been fixed, then it means that the center distance between the arc saddle 1 A2 and the arc saddle 2 A3 meets the requirements, otherwise it does not meet the requirements.

[0047] If the movable latch 402 is successfully inserted into the oil through hole A5, since the cross-sectional size of the lower end of the movable latch 402 in this embodiment matches the hole size of the oil through hole A5 (that is, after the movable latch 402 is inserted into the oil through hole A5, it is clearance-matched with the oil through hole A5 and can freely enter and exit the oil through hole A5), and the spacing between the movable latch 402 and the outer protruding end 310 is fixed, it means that the hole position of the oil through hole A5 meets the requirements.

[0048] Since the components in the inspection fixture have formed a fixed layout according to the relevant data of the standard parts, through the above steps and methods, we can use the inspection fixture to inspect the large arc elbow assembly 100 without straight segments, and check whether the center distance of the two arc saddles and the positions of the two oil holes on the large arc elbow A1 meet the requirements.

[0049] In this embodiment, the detection pin assembly and the positioning assembly are both arranged on the front end surface of the connection substrate 200, and are all located within the operator's sight. During the entire operation process, the operator can quickly and comprehensively observe the entire detection process without moving or excessively turning the head. During the operation process, the operating space is directly in front of the operator, and the operator can complete the operation without making a large movement or a large rotation of the head angle, which can reduce the fatigue caused by the operator's frequent movements or large rotation of the head.

Claims

1. A non-straight arc pipe bending inspection fixture, characterized in that: It comprises a connecting substrate, the front end surface of which is connected with a detection pin assembly and a positioning assembly distributed up and down; The positioning assembly includes a movable block, a positioning block, a limit block, a first tube body support block, a second tube body support block and a fixed latch installation block; The movable block and the positioning block are distributed on the left and right, the limiting block is located on the side of the movable block away from the positioning block, and a transversely retractable elastic component is provided between the movable block and the limiting block; The first tube body support block and the second tube body support block are located between the movable block and the positioning block; a limiting groove is provided at the upper end of the first tube body support block and the upper end of the second tube body support block respectively; The fixed latch mounting block is located between the movable block and the positioning block, and the upper end of the fixed latch mounting block is provided with a fixed latch extending upward; The detection pin assembly includes a movable latch pin 1 and a movable latch pin 2 which can move up and down; the upper end of the movable block is provided with a positioning socket for the movable latch pin 1 to be inserted; the lower end of the movable latch pin 1 is located directly above the positioning socket; the lower end of the movable latch pin 2 is located above the movable block and the positioning block; An outer protruding end with an arc curved surface structure is respectively provided on the side wall of the movable block facing the positioning block and on the side wall of the positioning block facing the movable block.

2. The non-straight-segment arc pipe bending inspection fixture according to claim 1, characterized in that: The fixed pin installation block is located between the first tube body support block and the second tube body support block.

3. The arc pipe bending gauge without straight line segment according to claim 2, characterized in that: A blocking portion is also provided on one side of the movable block to prevent the movable block from continuing to move toward the positioning block.

4. The arc pipe bending gauge without straight line segment according to claim 3, characterized in that: The outer protruding end is in the shape of a side wall of a cylinder as a whole and extends along the longitudinal direction.

5. A non-straight-segment arc pipe bending gauge according to any one of claims 1 to 4, characterized in that: The elastic component is a spring, one end of the spring is connected to the limiting block, and the other end of the spring is connected to the movable block.

6. The arc pipe bending gauge without straight line segment according to claim 5, characterized in that: A supporting block is also provided at the lower end of the connecting substrate.

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