Positioning and locking tool

Abstract

The utility model belongs to the technical field of valve body assembly, and discloses a positioning and locking tool. The positioning and locking tool is used for fixing a valve body to be assembled. The valve body comprises a main body part, a first connecting part and a second connecting part, wherein the first connecting part and the second connecting part are connected to the two ends of the main body part respectively. The positioning and locking tool comprises a base, a supporting piece, a limiting piece and a pressing piece, the supporting piece is movably arranged on the base, the supporting piece can abut against the first connecting part or the main body part, and the supporting piece is used for supporting the valve body; the limiting piece is fixedly arranged on the base, the limiting piece and the supporting piece are arranged at an interval, the limiting piece is provided with a U-shaped groove, and the U-shaped groove is used for containing and limiting the second connecting part; the pressing piece is arranged on the base, can move towards the U-shaped groove and is used for pressing and fixing the second connecting part in the U-shaped groove. According to the positioning and locking tool, stable supporting, precise limiting and reliable fixing of the valve body are achieved, the problems of shaking, displacement and the like of the valve body in the assembling process are avoided, and the assembling quality and the assembling efficiency of the valve body are effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve body assembling technical field, especially a kind of positioning locking tool. BACKGROUND

[0002] In part refrigeration system, need to install safety valve on the pressure vessel of refrigeration system. When safety valve needs to be replaced, to prevent the medium in refrigeration system from leaking, ball valve needs to be installed between safety valve and refrigeration system. When safety valve is removed, first close ball valve, then carry out removal operation. Therefore, during the manufacturing process of refrigeration system device, safety valve and ball valve need to be connected and assembled.

[0003] Currently, the assembly method of safety valve and ball valve is: first, use flat-nose pliers to clamp and fix the inner threaded head of ball valve, then align the outer thread of safety valve with the inner thread of ball valve, and finally use wrench to clamp safety valve, so that the two are screwed and fixed.

[0004] However, during clamping or loosening, ball valve or assembled safety valve and ball valve are prone to fall to the ground and be damaged due to gravity. Moreover, the clamping force of flat-nose pliers depends on manual operation. If the force is too small, the valve is prone to fall off; if the force is too large, the thread port of ball valve may be extruded and deformed. INVENTION CONTENTS

[0005] The utility model aims at providing a positioning locking tool to solve the problem of valve body falling and being damaged during assembly due to the use of flat-nose pliers, and to improve the quality and efficiency of valve body assembly.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A positioning locking tool for fixing a valve body to be assembled, the valve body comprising a main body portion and first and second connecting portions connected to both ends of the main body portion, respectively, the positioning locking tool comprising:

[0008] a base;

[0009] a support member movably arranged on the base, the support member being capable of abutting against the first connecting portion or the main body portion, and the support member being used to support the valve body;

[0010] a limiting member fixedly arranged on the base and spaced apart from the support member, the limiting member being provided with a U-shaped groove for accommodating and limiting the second connecting portion;

[0011] a pressing member arranged on the base and capable of moving towards the U-shaped groove, the pressing member being used to press and fix the second connecting portion in the U-shaped groove.

[0012] As an optional solution of the positioning and locking tool, the outer wall of the second connecting part is hexagonal, the U-shaped groove is shaped to match the outer wall of the second connecting part, and the U-shaped groove includes four limiting surfaces arranged at an angle, which are used to abut against the outer wall of the second connecting part.

[0013] As an optional solution of the positioning and locking tool, the support part is provided with an avoiding groove opposite to the U-shaped groove, the avoiding groove is used to accommodate the first connecting part, and the end of the support part close to the limiting part can support the main body part.

[0014] As an optional solution of the positioning and locking tool, the positioning and locking tool further includes a fastener, the base is provided with an adjusting hole along the arrangement direction of the support part and the limiting part, the fastener is connected with the support part through the adjusting hole, the fastener can slide in the adjusting hole when the support part moves relative to the limiting part, and the fastener is configured to lock the relative position between the support part and the limiting part.

[0015] As an optional solution of the positioning and locking tool, the base includes a bottom plate and an L-shaped column connected with each other, the bottom plate is vertically arranged with the L-shaped column, and the support part and the limiting part are connected with the L-shaped column through two adjacent side walls respectively.

[0016] As an optional solution of the positioning and locking tool, the base further includes a support frame connected with the L-shaped column, the support frame is provided with a mounting hole, and the pressing part is connected with the base through the mounting hole.

[0017] As an optional solution of the positioning and locking tool, the pressing part includes a fixed part, a pressing part, a connecting plate and a handle, the fixed part is fixedly connected with the base, the pressing part passes through the fixed part and is slidably connected with the fixed part, a first end of the connecting plate is rotatably connected with the fixed part, a second end of the connecting plate is rotatably connected with a first position of the handle, and the pressing part is rotatably connected with a second position of the handle, the handle is used to drive the pressing part to move along the fixed part, so that the pressing part presses or releases the second connecting part.

[0018] As an optional solution of the positioning and locking tool, the pressing part includes two spaced apart connecting plates, and the two connecting plates are located on both sides of the handle and the fixed part respectively.

[0019] As an optional solution of the positioning and locking tool, the fixed part includes a fixed body and a fixed nut, the fixed body passes through the mounting hole of the support frame and is threadedly connected with the fixed nut, and the fixed part is installed in the support frame.

[0020] As an optional solution of the positioning and locking tool, the pressing part comprises a push rod, an adjusting nut and a pressing head, one end of the push rod is rotationally connected with the second position of the handle, the push rod is slidably arranged in the fixing part, the second end of the push rod is fixedly connected with the adjusting nut, and the pressing head is threadedly connected with the adjusting nut, so as to adjust the distance between the pressing head and the push rod.

[0021] Beneficial effects:

[0022] The utility model provides a positioning and locking tool, base provides stable support, support piece is movably arranged on the base, and is in abutment with first connecting portion or main part, so as to realize the support to valve body, limiting piece is fixed on the base and is arranged at interval with support piece, the U -shaped groove of limiting piece can accurately contain and limit the position of second connecting portion, and the pressing piece is arranged on the base, can move towards U -shaped groove, thereby the second connecting portion is pressed in U -shaped groove. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the first schematic view of the positioning and locking tool provided by the utility model embodiment;

[0024] Figure 2 It is the second schematic view of the positioning and locking tool provided by the utility model embodiment;

[0025] Figure 3 It is the third schematic view of the positioning and locking tool provided by the utility model embodiment;

[0026] Figure 4 It is the structural schematic view of the pressing piece provided by the utility model embodiment;

[0027] Figure 5 It is the structural schematic view of the valve body provided by the utility model embodiment.

[0028] In the drawing:

[0029] 100, valve body; 101, main part; 102, first connecting portion; 103, second connecting portion;

[0030] 1, base; 11, bottom plate; 12, L-shaped stand; 13, support frame;

[0031] 2, support piece; 21, avoiding groove;

[0032] 3, limiting piece; 31, U-shaped groove; 311, limiting surface;

[0033] 4, pressing element; 41, fixed part; 42, pressing part; 43, connecting plate; 44, handle; 411, fixed body; 412, fixed nut; 421, push rod; 422, adjusting nut; 423, pressing head. DETAILED DESCRIPTION

[0034] The utility model will be described in further detail below in combination with the drawings and examples. It can be understood that the specific examples described herein are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0035] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0036] In the utility model, unless otherwise explicitly specified and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0037] In the description of the embodiment, the terms "up", "down" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0038] The embodiment provides a positioning and locking tool for fixing one of two valve bodies 100 to be assembled. Specifically, when manufacturing a refrigeration system, a safety valve is connected and assembled with a ball valve, and the positioning and locking tool can stably fix one of the valve bodies 100 to be assembled, so that it remains stationary during assembly, facilitating an operator to accurately connect the other valve body 100 therewith, thereby ensuring smooth assembly and improving the quality and efficiency of valve body 100 assembly, providing protection for safe and stable operation of the refrigeration system.

[0039] As Figures 1-5 shown, the positioning and locking tool is used to fix the valve body 100 to be assembled, and the valve body 100 includes a main body part 101 and first and second connecting parts 102 and 103 connected to both ends of the main body part 101 respectively. The positioning and locking tool includes a base 1, a support 2, a limiting part 3 and a pressing part 4. The support 2 is movably arranged on the base 1, and can abut against the first connecting part 102 or the main body part 101, and is used to support the valve body 100. The limiting part 3 is fixedly arranged on the base 1 and is arranged in a spaced manner with the support 2. The limiting part 3 is provided with a U-shaped groove 31, which is used to accommodate and limit the second connecting part 103. The pressing part 4 is arranged on the base 1 and can move towards the U-shaped groove 31, and is used to press and fix the second connecting part 103 in the U-shaped groove 31.

[0040] The base 1 provides stable support. The support 2 is movably arranged on the base 1 and can abut against the first connecting part 102 or the main body part 101, thereby achieving support of the valve body 100. The limiting part 3 is fixed on the base 1 and arranged in a spaced manner with the support 2. The U-shaped groove 31 of the limiting part 3 can accurately accommodate and limit the position of the second connecting part 103. The pressing part 4 is arranged on the base 1 and can move towards the U-shaped groove 31, thereby pressing the second connecting part 103 in the U-shaped groove 31. The positioning and locking tool achieves stable support, accurate limiting and reliable fixation of the valve body 100, avoids problems such as shaking and displacement of the valve body 100 during assembly, and effectively improves the assembly quality and efficiency of the valve body 100.

[0041] Specifically, the support 2 and the limiting part 3 are both plate-shaped. The limiting part 3 has a certain thickness, so that the groove wall of the U-shaped groove 31 can limit the second connecting part 103. Figure 1 and Figure 2 As shown, the outer wall of the second connecting part 103 is hexagonal, and the shape of the U-shaped groove 31 is adapted to the outer wall of the second connecting part 103. The U-shaped groove 31 includes four limiting faces 311 arranged at an angle, which are used to abut against the outer wall of the second connecting part 103. The outer wall of the second connecting part 103 is hexagonal, and the U-shaped groove 31 adapted thereto has four limiting faces 311 arranged at an angle and used to abut against the outer wall of the second connecting part 103, which can achieve accurate positioning and quickly determine the assembly position. The multiple faces constrain the translation and rotation of the second connecting part 103, ensure reliable and stable connection, are not easy to displace under external force impact, and can evenly distribute force and bear greater torque when transmitting torque due to the larger contact area.

[0042] In other embodiments, the U-shaped groove includes two parallel limiting surfaces 311 and a semicircular surface, the two ends of the semicircular surface being connected to the two limiting surfaces 311. When the outer wall of the second connecting part 103 is hexagonal, the U-shaped groove 31 can be fitted to the planar part of the hexagonal shape through the parallel limiting surfaces 311, and the semicircular surface is in line contact with the second connecting part 103. The connecting part can be constrained from different directions to prevent it from translating and rotating, thereby achieving stable positioning and fixing.

[0043] As shown in Figure 1 and Figure 2 , the support piece 2 is provided with an avoiding groove 21, the avoiding groove 21 is arranged opposite to the U-shaped groove 31, the avoiding groove 21 is used for accommodating the first connecting part 102, and the end of the support piece 2 close to the limiting piece 3 can support the main body part 101. The avoiding groove 21 provides an accommodation space for the first connecting part 102 and can limit the first connecting part 102. Since the diameter of the first connecting part 102 is smaller than the diameter of the main body part 101, a stepped structure is formed at the connection between the first connecting part 102 and the main body part 101. When the end of the support piece 2 close to the limiting piece 3 supports the main body part 101, the stepped structure can provide an additional support surface, so that the distribution of the support force is more uniform, thereby enhancing the stability of the entire positioning and locking tool and reducing the risk of loosening or displacement of the valve body 100 to be assembled.

[0044] In other embodiments, the support part directly abuts against the first connecting part 102. The end face of the first connecting part 102 away from the main body part 101 is a plane, and the support part directly abuts against the plane, which also provides a support force for the valve body 100.

[0045] In this embodiment, the positioning and locking tool further includes a fastener (not shown in the figure). The base 1 is provided with an adjusting hole along the arrangement direction of the support piece 2 and the limiting piece 3. The fastener is connected to the support piece 2 through the adjusting hole. When the support piece 2 moves relative to the limiting piece 3, the fastener can slide in the adjusting hole. The fastener is configured to lock the relative position between the support piece 2 and the limiting piece 3. By moving the support piece 2 relative to the limiting piece 3, sliding and locking the fastener in the adjusting hole, the positioning and locking tool can flexibly adjust the distance between the support piece 2 and the limiting piece 3, and can be adapted to valve bodies 100 of various sizes, without the need to design a tool for each valve body 100, thereby greatly reducing production costs. For valve bodies 100 of different sizes, the tool can be adjusted to a suitable state according to the actual size, and then locked by the fastener, so as to ensure that the valve body 100 is accurately positioned and firmly fixed during connection, thereby effectively ensuring the quality and stability of the assembly of the valve body 100. The operator only needs to simply move the support piece 2 and slide the fastener to the appropriate position and lock it according to the size of the valve body 100, so as to quickly complete the adjustment of the tool, which is simple and convenient to operate.

[0046] Specifically, the adjusting hole is an oblong hole arranged along the arrangement direction of the support 2 and the limiting piece 3, and two oblong holes are arranged at intervals on the base 1, and each oblong hole is provided with a fastener. The fastener is selected from a bolt and a nut, one end of the bolt is fixedly connected with the support 2, the other end of the bolt passes through the oblong hole, and the support 2 is fixed at a proper position on the base 1 by the nut at the other end of the bolt. Thus, the locking and fixing of the support 2 and the base 1 are realized.

[0047] As shown in Figures 1-3 , the base 1 comprises a bottom plate 11 and an L-shaped column 12 connected with each other, the bottom plate 11 is arranged perpendicularly to the L-shaped column 12, and the support 2 and the limiting piece 3 are connected with the L-shaped column 12 through two adjacent side walls respectively. The perpendicular arrangement of the bottom plate 11 and the L-shaped column 12 provides stable support for the base 1. The vertical connection mode enables the bottom plate 11 to uniformly disperse the pressure from the L-shaped column 12 and the support 2 and the limiting piece 3 mounted thereon, thereby enhancing the load-bearing capacity of the base 1. Meanwhile, the support 2 and the limiting piece 3 are connected with the L-shaped column 12 through two adjacent side walls respectively, which further increases the stability of the base 1, so that the positioning and locking tool is not prone to shaking or tilting during use, thereby ensuring the accuracy of positioning and locking. Specifically, the bottom plate 11 and the L-shaped column 12 are connected by welding or bolt connection, and an adjusting hole is formed in the L-shaped column 12 for adjusting the distance between the support 2 and the limiting piece 3.

[0048] As shown in Figures 1-3 , the base 1 further comprises a support frame 13 connected with the L-shaped column 12, and the support frame 13 is provided with a mounting hole through which the pressing piece 4 is connected with the base 1. The mounting hole allows the position of the pressing piece 4 to be adjusted flexibly, which can adapt to valve bodies 100 of different sizes and shapes and working scenes, thereby improving the versatility.

[0049] As shown in Figures 1-4 , the pressing piece 4 comprises a fixed part 41, a pressing part 42, a connecting plate 43 and a handle 44, the fixed part 41 is fixedly connected with the base 1, the pressing part 42 passes through the fixed part 41 and is slidably connected with the fixed part 41, a first end of the connecting plate 43 is rotatably connected with the fixed part 41, a second end of the connecting plate 43 is rotatably connected with a first position of the handle 44, and the pressing part 42 is rotatably connected with a second position of the handle 44. The handle 44 is used to drive the pressing part 42 to move along the fixed part 41, so as to press or release the second connecting part 103. The handle 44 has an L-shaped structure, one end of the L-shaped structure is used for holding and exerting force, and the other end is rotatably connected with the pressing part 42 (the second position). The L-shaped structure is rotatably connected with the second end of the connecting plate 43 at the turning position (the first position).

[0050] When it is needed to loosen the second connecting part 103, the operator holds the end of the handle 44 for force in the L-shaped structure and rotates the handle 44 away from the pressing part 42. Since the second position of the handle 44 is rotationally connected with the pressing part 42, the handle 44 rotates to drive the pressing part 42 to slide along the fixed part 41 away from the second connecting part 103. At the same time, the handle 44 drives the connecting plate 43 to rotate around the rotation connection point of the connecting plate 43 with the fixed part 41 through the first position during the rotation process. With the continuous rotation of the handle 44, the pressing part 42 gradually moves away from the second connecting part 103 until the constraint on the second connecting part 103 is completely released, at which time the second connecting part 103 can be conveniently disassembled or adjusted.

[0051] When it is needed to press the second connecting part 103, the operator reversely rotates the end of the handle 44 for force in the L-shaped structure. The handle 44 moves with the first position of the handle 44 with the connecting plate 43 and the second position of the handle 44 with the pressing part 42 as the rotation nodes to drive the pressing part 42 to slide along the fixed part 41 towards the second connecting part 103. With the continuous rotation of the handle 44, the pressing part 42 gradually approaches the second connecting part 103, and when it reaches the pressing state, the connecting plate 43 is nearly parallel to the pressing part 42, and the holding end of the handle 44 is perpendicular to the pressing part 42. In this state, the handle 44 effectively transmits the force applied by the operator to the pressing part 42 through reasonable force arm design, so that the pressing part 42 generates sufficient pressing force on the second connecting part 103 to ensure that the second connecting part 103 maintains a stable position in the positioning and locking tool, providing a reliable basis for subsequent operations.

[0052] Further, as shown in Figures 1-4 The pressing part 4 includes two spaced connecting plates 43, and the two connecting plates 43 are located on the two sides of the handle 44 and the fixed part 41, respectively. The pressing part 4 is provided with two spaced connecting plates 43 located on the two sides of the handle 44 and the fixed part 41, which can uniformly distribute the force generated by the rotation of the handle 44, reduce the risk of damage to the parts due to excessive local stress, prevent the handle 44 and the fixed part 41 from shifting and shaking to ensure the relative position of the parts stable, improve the positioning and pressing precision, make the handle 44 rotate more smoothly and reduce the jamming, even if one connecting plate 43 is damaged, the other can also maintain a certain function, and the operation difficulty is also reduced, the overall performance and use effect are improved.

[0053] As shown in Figures 1-4As shown, the fixing part 41 comprises a fixing body 411 and a fixing nut 412, the fixing body 411 is threaded through the mounting hole of the support frame 13 and is threadedly connected with the fixing nut 412, so as to install the fixing part 41 on the support frame 13. By threading the fixing body 411 through the mounting hole of the support frame 13 and threadedly connecting it with the fixing nut 412, the fixing part 41 can be firmly installed on the support frame 13. The threaded connection has a self-locking feature, and even if the tool is subjected to external forces such as vibration and impact during use, the fixing nut 412 will not loosen easily, ensuring the stability of the compression part 4 as a whole, and further ensuring the reliable compression effect on the second connecting part 103.

[0054] Specifically, the fixing body 411 comprises a fixing section and a connecting section, the fixing section is in the shape of a cuboid, and the connecting section is in the shape of a cylinder, and the fixing section and the connecting section are fixedly connected. Along the axial direction of the fixing body 411, the cross-sectional area of the fixing section is larger than that of the connecting section. The outer wall of the connecting section is provided with external threads, which can be threadedly connected with the fixing nut 412. During installation, the connecting section is threaded through the mounting hole of the support frame 13, so that the support frame 13 is clamped between the fixing nut 412 and the fixing section, thereby achieving stable installation of the fixing body 411. In addition, a through hole is provided in the fixing body 411 along the axial direction, which allows the abutting part 42 to move therein.

[0055] As shown, Figures 1-4 The abutting part 42 comprises a push rod 421, an adjusting nut 422 and a compression head 423, one end of the push rod 421 is rotatably connected with the second position of the handle 44, the push rod 421 is slidably threaded through the fixing part 41, the second end of the push rod 421 is fixedly connected with the adjusting nut 422, and the compression head 423 is threadedly connected with the adjusting nut 422, which is used to adjust the distance between the compression head 423 and the push rod 421. When the compression head 423 comes into contact with the second connecting part 103 and starts to compress, fine pressure adjustment can be performed due to the threaded connection between the adjusting nut 422 and the compression head 423. If it is necessary to increase the pressure on the second connecting part 103, the compression head 423 can be rotated to move towards the second connecting part 103, thereby reducing the distance between the compression head 423 and the push rod 421, so that the compression head 423 exerts greater force on the second connecting part 103, ensuring stable connection. Conversely, if the pressure is too large and may damage the second connecting part 103, the compression head 423 can be rotated in the opposite direction to increase the distance between the compression head 423 and the push rod 421, thereby reducing the pressure on the second connecting part 103. For second connecting parts 103 of different sizes, materials and structures, appropriate compression force can be achieved by adjusting the distance between the compression head 423 and the push rod 421.

[0056] The operation steps of the positioning and locking tool provided in the embodiment are as follows (taking a ball valve and a safety valve as an example):

[0057] First, the ball valve is placed on the support 2, the first connecting part 102 of the ball valve is put into the avoiding groove 21, and the second connecting part 103 is in abutment with the limiting surface 311 of the U-shaped groove 31. Then, the handle 44 is rotated, the pressing part 42 is moved towards the second connecting part 103, and the second connecting part 103 is tightly pressed in the U-shaped groove 31.

[0058] After the ball valve is fixed, the safety valve is aligned with the second connecting part 103, a wrench or other tools are used to rotate the safety valve, and the safety valve is connected with the ball valve through threads.

[0059] After the connection is completed, the handle 44 is reversely rotated, the pressing part 42 is moved away from the second connecting part 103, and the assembled ball valve and safety valve will not fall off due to the support of the support 2. The operator can take down the assembled ball valve and safety valve, and the next assembly work can be carried out.

[0060] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not the limitation of the embodiments of the utility model. For the ordinary skilled in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the utility model. Here, all the embodiments cannot be exhausted. Any modification, equivalent substitution and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A positioning and locking fixture for fixing a valve body (100) to be assembled, the valve body (100) comprising a main body (101) and a first connecting portion (102) and a second connecting portion (103) respectively connected to both ends of the main body (101), characterized in that, The positioning and locking fixture includes: Base (1); A support member (2) is movably disposed on the base (1). The support member (2) can abut against the first connecting part (102) or the main body part (101). The support member (2) is used to support the valve body (100). The limiting member (3) is fixedly disposed on the base (1) and spaced apart from the support member (2). The limiting member (3) is provided with a U-shaped groove (31), which is used to accommodate and limit the second connecting part (103). A clamping member (4) is disposed on the base (1) and is movable toward the U-shaped groove (31). The clamping member (4) is used to clamp and fix the second connecting part (103) in the U-shaped groove (31).

2. The positioning and locking fixture according to claim 1, characterized in that, The outer wall of the second connecting part (103) is hexagonal, and the shape of the U-shaped groove (31) is adapted to the outer wall of the second connecting part (103). The U-shaped groove (31) includes four limiting surfaces (311) arranged at an angle, and the limiting surfaces (311) are used to abut against the outer wall of the second connecting part (103).

3. The positioning and locking fixture according to claim 1, characterized in that, The support member (2) is provided with a relief groove (21), which is opposite to the U-shaped groove (31). The relief groove (21) is used to accommodate the first connecting part (102). The end of the support member (2) near the limiting member (3) can support the main body part (101).

4. The positioning and locking fixture according to claim 1, characterized in that, The positioning and locking fixture also includes a fastener. The base (1) is provided with an adjustment hole along the arrangement direction of the support member (2) and the limiting member (3). The fastener passes through the adjustment hole and is connected to the support member (2). When the support member (2) moves relative to the limiting member (3), the fastener can slide in the adjustment hole. The fastener is configured to lock the relative position between the support member (2) and the limiting member (3).

5. The positioning and locking fixture according to claim 1, characterized in that, The base (1) includes a bottom plate (11) and an L-shaped column (12) connected to each other. The bottom plate (11) is perpendicular to the L-shaped column (12). The support member (2) and the limiting member (3) are respectively connected to the L-shaped column (12) through two adjacent side walls.

6. The positioning and locking fixture according to claim 5, characterized in that, The base (1) also includes a support frame (13), which is connected to the L-shaped column (12). The support frame (13) is provided with mounting holes, and the clamping member (4) passes through the mounting holes and is connected to the base (1).

7. The positioning and locking fixture according to claim 1, characterized in that, The clamping member (4) includes a fixing part (41), a pressing part (42), a connecting plate (43), and a handle (44). The fixing part (41) is fixedly connected to the base (1). The pressing part (42) passes through the fixing part (41) and is slidably connected to the fixing part (41). The first end of the connecting plate (43) is rotatably connected to the fixing part (41). The second end of the connecting plate (43) is rotatably connected to the first position of the handle (44). The pressing part (42) is rotatably connected to the second position of the handle (44). The handle (44) is used to drive the pressing part (42) to move along the fixing part (41) so that the pressing part (42) presses or releases the second connecting part (103).

8. The positioning and locking fixture according to claim 7, characterized in that, The clamping member (4) includes two spaced-apart connecting plates (43), which are located on both sides of the handle (44) and the fixing part (41), respectively.

9. The positioning and locking fixture according to claim 7, characterized in that, The fixing part (41) includes a fixing body (411) and a fixing nut (412). The fixing body (411) passes through the mounting hole of the support frame (13) and is threadedly connected to the fixing nut (412) to install the fixing part (41) onto the support frame (13).

10. The positioning and locking fixture according to claim 7, characterized in that, The pressing part (42) includes a push rod (421), an adjusting nut (422), and a pressing head (423). One end of the push rod (421) is rotatably connected to the second position of the handle (44). The push rod (421) slides through the fixing part (41). The second end of the push rod (421) is fixedly connected to the adjusting nut (422). The pressing head (423) is threadedly connected to the adjusting nut (422) and is used to adjust the distance between the pressing head (423) and the push rod (421).

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