Positioning jig

Abstract

The utility model provides a locating jig which is used for locating a workpiece and a small piece so as to improve locating accuracy and reduce damage, the small piece comprises a connecting portion and an auxiliary portion which are connected, the auxiliary portion is provided with a guide hole, the locating jig comprises a bearing seat and a floating piece, the bearing seat comprises a bearing piece, a supporting piece, a limiting piece and the floating piece, the supporting piece is arranged on the bearing piece, and the limiting piece is arranged on the bearing piece; the side, away from the bearing piece, of the limiting piece is provided with a limiting face used for bearing the small piece, the limiting face is provided with a guide body matched with the guide hole and a limiting groove used for containing the auxiliary part, one end of the floating piece is arranged on the bearing piece, and the other end of the floating piece movably penetrates through the supporting piece to support the workpiece. The sealing cover seat is used for covering the bearing seat so as to press and hold the workpiece positioned on the floating piece; and the locking mechanism is rotationally connected with the bearing part and used for rolling and pressing the sealing cover seat so as to lock the sealing cover seat and the bearing seat and enable the workpiece to abut against the connecting part, and when the locking mechanism does not lock the sealing cover seat and the bearing seat, the connecting part and the workpiece located on the floating part are arranged at intervals.

Description

Technical Field

[0001] This utility model relates to the field of assembly and positioning technology, specifically to a positioning fixture. Background Technology

[0002] Currently, when positioning workpieces and small parts, the workpiece and small part are usually placed in their respective loading units first, and then fastened together using a snap-fit ​​method. The small parts are often small components such as spring clips or inserts. However, during the snap-fit ​​process, relative movement between the workpiece and small part can easily occur, leading to poor positioning accuracy. Furthermore, direct fastening can easily damage both the small parts and the workpiece. Utility Model Content

[0003] In view of the above, it is necessary to provide a positioning fixture to improve the positioning accuracy of workpieces and small parts and reduce damage to workpieces and small parts.

[0004] This utility model embodiment provides a positioning fixture for positioning workpieces and small parts. The small parts include a connecting part and an auxiliary part connected together. The auxiliary part has a guide hole. The positioning fixture includes:

[0005] The support base includes a support member, a limiting member, a limiting member, and a floating member. The supporting member is disposed on the support member, and the limiting member is disposed on the support member. The limiting member has a limiting surface on the side opposite to the support member for supporting the small part. The limiting surface is provided with a guide body adapted to the guide hole and a limiting groove for accommodating the auxiliary part. One end of the floating member is disposed on the support member, and the other end of the floating member is movably inserted through the supporting member to support the workpiece.

[0006] A cover seat is used to cover the support seat to hold the workpiece located on the floating member;

[0007] A locking mechanism, rotatably connected to the carrier, is used to roll and press the cover seat to lock the cover seat and the carrier seat.

[0008] When the locking mechanism does not lock the cover seat and the support seat, the connecting part and the workpiece located on the floating member are spaced apart in the floating direction of the floating member. Under the action of the locking mechanism, the cover seat pushes the workpiece against the floating member so that the workpiece abuts against the connecting part.

[0009] In some embodiments, there are multiple floating members, and the support members include:

[0010] A support substrate is disposed on the carrier member, and the support substrate has a through hole for accommodating the limiting member, the through hole penetrating the support substrate along the floating direction of the floating member;

[0011] Multiple support protrusions are connected to the side of the support base plate away from the carrier member. Each of the multiple support protrusions corresponds to a multiple of the floating members. Each floating member is disposed on the carrier member and movably passes through the support base plate and the corresponding support protrusion to guide the workpiece to the multiple support protrusions.

[0012] In some embodiments, the floating element includes:

[0013] An elastomer is embedded in the support member;

[0014] A floating body, one end of which extends into the bearing member and abuts against the elastic body, and the other end of which is movably inserted through the support member to support the workpiece.

[0015] In some embodiments, the floating body includes:

[0016] A floating part, one end of which extends into the carrier member, and the other end of which is movably inserted through the support member to support the workpiece;

[0017] A stop portion is connected to the floating portion and movably embedded in the support member. One end of the stop portion abuts against the elastic body, and the other end of the stop portion is used to limit the movement of the floating portion by engaging with the support member.

[0018] In some embodiments, the small component is a metal member, and the support further includes:

[0019] A magnetic element is embedded in the limiting element and is used to attract the small item.

[0020] In some embodiments, positioning openings are provided at both opposite ends of the workpiece, and the positioning fixture further includes:

[0021] A first positioning element is provided on the bearing element and is used to insert into one of the positioning ports of the workpiece;

[0022] The second positioning member is disposed on the bearing member and spaced apart from the first positioning member. The second positioning member is used to insert into another positioning port of the workpiece. The support member is disposed between the first positioning member and the second positioning member.

[0023] In some embodiments, the carrier member has an adjustment groove, the adjustment groove being located on the side of the second positioning member opposite to the first positioning member, and the positioning fixture further includes:

[0024] An adjusting member is movably disposed in the adjusting groove, and the adjusting member has a sliding inclined surface on the side opposite to the second positioning member;

[0025] A reset member is provided in the adjustment groove, and both ends of the reset member elastically abut against the sidewalls of the adjustment member and the adjustment groove, respectively.

[0026] A pusher is provided in the adjustment groove, and the side of the pusher facing the adjustment member is provided with a pusher inclined surface that slides in cooperation with the sliding inclined surface;

[0027] The cap seat pushes the pusher under the action of the locking mechanism, so that the pushing inclined surface of the pusher slides against the sliding inclined surface of the adjusting member, thereby causing the adjusting member to push the workpiece against the first positioning member and compress the reset member.

[0028] In some embodiments, the first positioning element includes:

[0029] A fixing body is connected to the bearing member, and the fixing body has a movable groove on the side facing the second positioning member;

[0030] A movable body, movably disposed in the movable slot;

[0031] A locking body is threadedly connected to the fixed body and the movable body to adjust the distance of the movable body relative to the second positioning member.

[0032] In some embodiments, the cap holder includes:

[0033] The cover is provided with a pressing groove that rolls with the locking mechanism;

[0034] A holding member is connected to the cover member, and the holding member and the holding groove are located on opposite sides of the cover member. The holding member is used to hold the workpiece.

[0035] An elastic element, the two ends of which elastically abut against the cover and the pressing element, respectively.

[0036] In some embodiments, the sealing member includes a sealing body and a disassembly body. The sealing body has a through groove, a mounting groove, and a holding groove. The through groove extends through the sealing body along the floating direction of the floating member. The mounting groove is formed on the surface of the sealing body and communicates with the through groove. The disassembly body is detachably connected to the sealing body and seals the through groove. The holding member includes a holding body and a mounting body. One end of the mounting body is connected to the holding body and accommodated in the mounting groove. The other end of the holding body protrudes from the through groove to hold the workpiece. The two ends of the elastic member elastically abut against the disassembly body and the holding body, respectively.

[0037] In the aforementioned positioning fixture, the limiting groove and guide body limit the movement of the small part relative to the workpiece during the positioning process, thereby improving the positioning accuracy of both the workpiece and the small part. Furthermore, when the workpiece is placed on the floating component, the floating component supports the workpiece and keeps the workpiece and the small part separated and not in contact in the floating direction of the floating component. When the cover seat is placed on the support seat, the cover seat does not contact the workpiece. Under the action of the locking mechanism, the cover seat pushes the workpiece to compress the floating component until the workpiece abuts against the connecting part of the small part. The positioning process of the aforementioned positioning fixture is simple and avoids damage to the workpiece and the small part caused by direct contact. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of the workpiece and small parts applicable to embodiments of this utility model.

[0039] Figure 2 This is a schematic diagram of the positioning fixture, workpiece, and small parts in an embodiment of this utility model.

[0040] Figure 3 for Figure 1 An exploded view of the positioning fixture shown.

[0041] Figure 4 for Figure 3 The diagram shows an enlarged view of the positioning fixture at point E.

[0042] Figure 5 for Figure 2 The diagram shows a cross-sectional view of the positioning fixture, workpiece, and small parts along the AA direction.

[0043] Figure 6 for Figure 2 The diagram shows a cross-sectional view of the positioning fixture, workpiece, and small parts along the BB direction.

[0044] Figure 7 for Figure 2 The diagram shows a cross-sectional view of the positioning fixture, workpiece, and small parts along the CC direction.

[0045] Figure 8 for Figure 3 The diagram shows a cross-sectional view of the first positioning element, the carrier element, and the supporting base plate along the DD direction in the positioning fixture shown.

[0046] Key component symbols: Positioning fixture 100, bearing seat 110, bearing member 111, adjusting groove 111a, support member 112, support base plate 1121, through hole 1121a, support protrusion 1122, limiting member 113, limiting surface 113a, guide body 113b, limiting groove 113c, floating member 114, elastic body 1141, floating body 1142, floating part 1142a, stop part 1142b, cover seat 120, cover member 121, pressing groove 121a, cover body 1211, through groove 1211a. Mounting groove 1211b, disassembly body 1212, holding member 122, holding body 1221, mounting body 1222, elastic member 123, locking mechanism 130, first positioning member 140, fixed body 141, movable groove 141a, movable body 142, locking body 143, second positioning member 150, adjusting member 160, sliding inclined surface 160a, reset member 170, pushing member 180, pushing inclined surface 180a, workpiece 200, positioning port 200a, small part 300, connecting part 310, auxiliary part 320, guide hole 320a. Detailed Implementation

[0047] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0048] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a connection that allows for mutual communication; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components or the interaction between two components. In the description of this utility model, it should be noted that "multiple" means two or more, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0049] The embodiments of this case will be described in detail below with reference to the accompanying drawings.

[0050] Please see Figure 1 , Figure 1This is a schematic diagram of the structure of the workpiece and small part applicable to an embodiment of the present invention. Exemplarily, the workpiece 200 has a generally sheet-like structure, with positioning openings 200a on opposite sides of the workpiece 200. The positioning openings 200a penetrate the workpiece 200 along its thickness direction. The small part 300 includes a connecting portion 310 and an auxiliary portion 320 connected together, with a guide hole 320a in the auxiliary portion 320. The connecting portion 310 is used to fit against the surface of the workpiece 200. In this embodiment, the small part 300 is a generally Z-shaped metal spring.

[0051] Please see Figure 2 , Figure 3 and Figure 4 This utility model provides a positioning fixture 100 for positioning a workpiece 200 and a small part 300. The positioning fixture 100 includes a support base 110, a cover base 120, and a locking mechanism 130. The support base 110 includes a support member 111, a support member 112, a limiting member 113, and a floating member 114. The support member 112 is disposed on the support member 111, and the limiting member 113 is disposed on the support member 111. The limiting member 113 has a limiting surface 113a for supporting the small part 300 on the side opposite to the support member 111. The limiting surface 113a has a guide body 113b adapted to the guide hole 320a and a limiting groove 113c for accommodating the auxiliary part 320. One end of the floating member 114 is disposed on the support member 111, and the other end of the floating member 114 is movably inserted through the support member 112 to support the workpiece 200. The cap 120 is used to cover the support 110 to hold the workpiece 200 located on the floating member 114. The locking mechanism 130 is rotatably connected to the support 111 and is used to roll and hold the cap 120 to lock the cap 120 and the support 110. When the locking mechanism 130 does not lock the cap 120 and the support 110, the connecting part 310 and the workpiece 200 located on the floating member 114 are spaced apart in the floating direction of the floating member 114. Under the rolling pressure of the locking mechanism 130, the cap 120 pushes the workpiece 200 against the floating member 114 so that the workpiece 200 abuts against the connecting part 310.

[0052] In this embodiment, the carrier 111 is generally rectangular, and there are two locking mechanisms 130 located on both sides of the carrier 111 along its length. The locking mechanisms 130 lock the cover seat 120 and the carrier seat 110 by rolling and pressing the cover seat 120. The specific working principle and process can be obtained directly from published documents and will not be described in detail here.

[0053] In the aforementioned positioning fixture 100, the small part 300 is limited by the limiting groove 113c and the guide body 113b, which can prevent the small part 300 from moving relative to the workpiece 200 during the positioning process, thereby improving the positioning accuracy of the workpiece 200 and the small part 300. Furthermore, when the workpiece 200 is placed on the floating member 114, the floating member 114 supports the workpiece 200 and keeps the workpiece 200 and the small part 300 separated and not in contact in the floating direction of the floating member 114. When the cover seat 120 is placed on the support seat 110, the cover seat 120 does not contact the workpiece 200. Under the action of the locking mechanism 130, the cover seat 120 pushes the workpiece 200 to compress the floating member 114 until the workpiece 200 abuts against the connecting portion 310 of the small part 300, thus forming a... Figure 5 As shown, the positioning process of the positioning fixture 100 is simple and can avoid damage to the workpiece 200 and the small part 300 caused by direct contact.

[0054] Please see Figure 3 and Figure 4 In some embodiments, there are multiple floating members 114, and the support member 112 includes a support base plate 1121 and multiple support protrusions 1122. The support base plate 1121 is disposed on the carrier member 111, and the support base plate 1121 has a through hole 1121a for accommodating the limiting member 113. The through hole 1121a passes through the support base plate 1121 along the floating direction of the floating member 114. The multiple support protrusions 1122 are all connected to the side of the support base plate 1121 away from the carrier member 111. The multiple support protrusions 1122 correspond one-to-one with the multiple floating members 114. Each floating member 114 is disposed on the carrier member 111 and movably passes through the support base plate 1121 and the corresponding support protrusion 1122 to guide the workpiece 200 to the multiple support protrusions 1122.

[0055] Therefore, multiple support protrusions 1122 can provide multi-point support for the workpiece 200, making it easier to adapt to workpieces 200 with various structures and increasing the range of support provided by the support member 112. Furthermore, by using a one-to-one correspondence between multiple floating members 114 and multiple support protrusions 1122, when it is necessary to replace the floating member 114 and the support protrusion 1122, only the corresponding individual floating member 114 and support protrusion 1122 can be replaced, avoiding the need for a complete replacement of the floating member 114 and the support member 112, thus reducing the replacement cost of the floating member 114 and the support member 112.

[0056] In this embodiment, the multiple support protrusions 1122 and the support substrate 1121 are integrated into one structure, which can reduce the processing difficulty of the support member 112.

[0057] Please see Figure 3 and Figure 6In some embodiments, the floating member 114 includes an elastic body 1141 and a floating body 1142. The elastic body 1141 is embedded in the support member 111, one end of the floating body 1142 extends into the support member 111 and abuts against the elastic body 1141, and the other end of the floating body 1142 is movably inserted through the support member 112 to support the workpiece 200. Exemplarily, the elastic body 1141 is a spring.

[0058] Therefore, one end of the floating body 1142 extends into the bearing member 111 and abuts against the elastic body 1141. Under the elastic force of the elastic body 1141, the floating body 1142 moves vertically. The bearing member 111 can limit the floating body 1142 in the horizontal direction to improve the stability of the floating body 1142's movement. In addition, the elastic body 1141 and the floating body 1142 have simple structures and low manufacturing costs.

[0059] Please see Figure 6 In some embodiments, the floating body 1142 includes a floating portion 1142a and a stop portion 1142b. One end of the floating portion 1142a extends into the carrier member 111, and the other end of the floating portion 1142a is movably inserted through the support member 112 to support the workpiece 200. The stop portion 1142b connects to the floating portion 1142a and is embedded in the carrier member 111. One end of the stop portion 1142b abuts against the elastic body 1141, and the other end of the stop portion 1142b abuts against the support member 112 to limit the floating portion 1142a. The floating body 1142 is generally inverted T-shaped.

[0060] Therefore, the stop part 1142b can limit the range of movement of the floating part 1142a in its moving direction, which is beneficial to improving the floating accuracy of the floating body 1142.

[0061] In this embodiment, the floating part 1142a and the stop part 1142b are an integral structure, which can simplify the processing difficulty of the floating body 1142 and reduce the manufacturing cost of the floating body 1142.

[0062] Please see Figure 5 In some embodiments, the support 110 further includes a magnetic element 115. The magnetic element 115 is embedded in the limiting element 113 and is used to attract the small part 300 to improve the stability of the small part 300 being fixed on the limiting element 113.

[0063] In this embodiment, the magnetic suction member 115 is embedded in the bottom wall of the limiting groove 113c to attract the auxiliary part 320 of the small part 300, so that the guide body 113b and the magnetic suction member 115 form a two-point positioning of the auxiliary part 320, which is beneficial to improve the positioning accuracy of the small part 300.

[0064] Please see Figure 3In some embodiments, the positioning fixture 100 further includes a first positioning member 140 and a second positioning member 150. The first positioning member 140 is disposed on the support member 111 and is used to insert into one of the positioning ports 200a of the workpiece 200. The second positioning member 150 is disposed on the support member 111 and is spaced apart from the first positioning member 140. The second positioning member 150 is used to insert into the other positioning port 200a of the workpiece 200. The support member 112 is disposed between the first positioning member 140 and the second positioning member 150.

[0065] In this embodiment, the first positioning member 140 and the second positioning member 150 are located at both ends of the length direction of the bearing member 111.

[0066] Therefore, the first positioning element 140 and the second positioning element 150 can limit the workpiece 200 in the horizontal direction, which helps to improve the positioning accuracy of the workpiece 200.

[0067] Please see Figure 7 In some embodiments, the support member 111 has an adjustment groove 111a, which is located on the side of the second positioning member 150 opposite to the first positioning member 140. The positioning fixture 100 also includes an adjustment member 160, a reset member 170, and a pusher 180. The adjustment member 160 is movably disposed in the adjustment groove 111a, and the side of the adjustment member 160 opposite to the second positioning member 150 has a sliding inclined surface 160a. The reset member 170 is disposed in the adjustment groove 111a, and its two ends elastically abut against the sidewalls of the adjustment member 160 and the adjustment groove 111a, respectively. The pusher 180 is disposed in the adjustment groove 111a, and the side of the pusher 180 facing the adjustment member 160 has a pushing inclined surface 180a that slides with the sliding inclined surface 160a. Exemplarily, the reset member 170 is a spring.

[0068] When positioning workpiece 200 and small part 300, the cover seat 120 pushes the pusher 180 under the action of the locking mechanism 130, so that the pushing inclined surface 180a of the pusher 180 slides against the sliding inclined surface 160a of the adjusting member 160, thereby causing the adjusting member 160 to push workpiece 200 against the first positioning member 140 and compress the reset member 170. When the cover seat 120 is placed on the pusher 180, it does not press the workpiece 200. The cover seat 120 pushes the pusher 180 in the vertical direction. The pusher 180 converts the vertical force it receives into a horizontal force on the adjusting member 160 through the pushing inclined surface 180a and the sliding inclined surface 160a, so as to adjust the position of workpiece 200. When the cover seat 120 presses the workpiece 200, the position of the workpiece 200 is adjusted to correspond with the connecting part 310 of the small part 300, which helps to improve the positioning accuracy of workpiece 200 and small part 300.

[0069] Please see Figure 8In some embodiments, the first positioning member 140 includes a fixed body 141, a movable body 142, and a locking body 143. The fixed body 141 is connected to the carrier member 111, and the fixed body 141 has a movable groove 141a on the side facing the second positioning member 150. The movable body 142 is movably disposed in the movable groove 141a. The locking body 143 is threadedly connected to the fixed body 141 and the movable body 142 to adjust the distance between the movable body 142 and the second positioning member 150. Exemplarily, the locking body 143 is a bolt.

[0070] Therefore, the distance between the movable body 142 and the second positioning member 150 can be adjusted by the locking body 143, so as to change the size of the workpiece 200 that the positioning fixture 100 can adapt to, so that the positioning fixture 100 can adapt to a variety of workpiece 200 size ranges.

[0071] Please see Figure 3 In some embodiments, the cover seat 120 includes a cover member 121, a holding member 122, and an elastic member 123. The cover member 121 has a holding groove 121a that cooperates with the locking mechanism 130. The holding member 122 is connected to the cover member 121, and the holding member 122 and the holding groove 121a are located on opposite sides of the cover member 121. The holding member 122 is used to hold the workpiece 200. The two ends of the elastic member 123 elastically abut against the cover member 121 and the holding member 122, respectively. Exemplarily, the elastic member 123 is a spring.

[0072] Therefore, the elastic element 123 can form a buffer between the cover element 121 and the holding element 122, so that the holding element 122 elastically holds the workpiece 200 to avoid damage to the workpiece 200.

[0073] In this embodiment, there are two pressing grooves 121a, which are located at both ends of the cover 121 in the longitudinal direction.

[0074] Please continue reading Figure 3 In some embodiments, the sealing member 121 includes a sealing body 1211 and a disassembly body 1212. The sealing body 1211 has a through groove 1211a, a mounting groove 1211b, and a holding groove 121a. The through groove 1211a extends through the sealing body 1211 along the floating direction of the floating member 114. The mounting groove 1211b is formed on the surface of the sealing body 1211 and communicates with the through groove 1211a. The disassembly body 1212 is detachably connected to the sealing body 1211 and seals the through groove 1211a. The holding member 122 includes a holding body 1221 and a mounting body 1222. The mounting body 1222 is connected to one end of the holding body 1221 and accommodated in the mounting groove 1211b. The other end of the holding body 1221 protrudes from the through groove 1211a to hold the workpiece 200. The two ends of the elastic member 123 elastically abut against the disassembly body 1212 and the holding body 1221, respectively.

[0075] Therefore, the detachable body 1212 can be detachably connected to the cover body 1211, which facilitates the assembly of the cover 121. The mounting body 1222 can be positioned through the mounting groove 1211b, and the pressing body 1221 can be positioned through the through groove 1211a, which helps to improve the installation accuracy of the cover 121 and the pressing body 122.

[0076] The working process of the positioning fixture 100 positioning workpiece 200 and small part 300 is roughly as follows:

[0077] First, the small part 300 is moved manually or by a special fixture to the limiting surface 113a of the limiting member 113, and the guide 113b in the limiting member 113 is inserted into the guide hole 320a of the small part 300. The auxiliary part 320 of the small part 300 is accommodated in the limiting groove 113c. At this time, the magnetic suction member 115 attracts the auxiliary part 320 of the small part 300 to achieve the positioning of the small part 300.

[0078] Secondly, the workpiece 200 is moved manually or by a special fixture to the floating body 1142 of multiple floating parts 114. At this time, the connection part 310 between the workpiece 200 and the small part 300 is in a separated and non-contact state in the floating direction of the floating body 1142.

[0079] Then, the locking mechanism 130 is driven to rotate in the holding groove 121a to roll and hold the cover 121. The cover 121 drives the holding member 122 to push the pusher 180 downward. The pushing slope 180a of the pusher 180 slides against the sliding slope 160a of the adjusting member 160, so that the adjusting member 160 pushes the workpiece 200 to abut against the first positioning member 140 and compresses the reset member 170.

[0080] Continue rotating the locking mechanism 130 to roll and hold the cover 121. The cover 121 drives the holding member 122 to push the workpiece 200 downward against the floating body 1142 and compress the elastic body 1141 until the workpiece 200 abuts against the connecting part 310 of the small part 300.

[0081] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be incorporated into this invention.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model.

Claims

1. A positioning fixture for positioning a workpiece and a small part, the small part comprising a connecting portion and an auxiliary portion connected together, the auxiliary portion having a guide hole, characterized in that, The positioning fixture includes: The support base includes a support member, a limiting member, a limiting member, and a floating member. The supporting member is disposed on the support member, and the limiting member is disposed on the support member. The limiting member has a limiting surface on the side opposite to the support member for supporting the small part. The limiting surface is provided with a guide body adapted to the guide hole and a limiting groove for accommodating the auxiliary part. One end of the floating member is disposed on the support member, and the other end of the floating member is movably inserted through the supporting member to support the workpiece. A cover seat is used to cover the support seat to hold the workpiece located on the floating member; A locking mechanism, rotatably connected to the carrier, is used to roll and press the cover seat to lock the cover seat and the carrier seat. When the locking mechanism does not lock the cover seat and the support seat, the connecting part and the workpiece located on the floating member are spaced apart in the floating direction of the floating member. Under the action of the locking mechanism, the cover seat pushes the workpiece against the floating member so that the workpiece abuts against the connecting part.

2. The positioning fixture as described in claim 1, characterized in that, There are multiple floating components, and the supporting components include: A support substrate is disposed on the carrier member, and the support substrate has a through hole for accommodating the limiting member, the through hole penetrating the support substrate along the floating direction of the floating member; Multiple support protrusions are connected to the side of the support base plate away from the carrier member. Each of the multiple support protrusions corresponds to a multiple of the floating members. Each floating member is disposed on the carrier member and movably passes through the support base plate and the corresponding support protrusion to guide the workpiece to the multiple support protrusions.

3. The positioning fixture as described in claim 1, characterized in that, The floating component includes: An elastomer is embedded in the support member; A floating body, one end of which extends into the bearing member and abuts against the elastic body, and the other end of which is movably inserted through the support member to support the workpiece.

4. The positioning fixture as described in claim 3, characterized in that, The floating body includes: A floating part, one end of which extends into the carrier member, and the other end of which is movably inserted through the support member to support the workpiece; A stop portion is connected to the floating portion and movably embedded in the support member. One end of the stop portion abuts against the elastic body, and the other end of the stop portion is used to limit the movement of the floating portion by engaging with the support member.

5. The positioning fixture as described in claim 1, characterized in that, The small component is a metal part, and the support base further includes: A magnetic element is embedded in the limiting element and is used to attract the small item.

6. The positioning fixture as described in claim 1, characterized in that, The workpiece has positioning openings at both opposite ends, and the positioning fixture further includes: A first positioning element is provided on the bearing element and is used to insert into one of the positioning ports of the workpiece; The second positioning member is disposed on the bearing member and spaced apart from the first positioning member. The second positioning member is used to insert into another positioning port of the workpiece. The support member is disposed between the first positioning member and the second positioning member.

7. The positioning fixture as described in claim 6, characterized in that, The support member has an adjustment groove, which is located on the side of the second positioning member opposite to the first positioning member. The positioning fixture also includes: An adjusting member is movably disposed in the adjusting groove, and the adjusting member has a sliding inclined surface on the side opposite to the second positioning member; A reset member is provided in the adjustment groove, and both ends of the reset member elastically abut against the sidewalls of the adjustment member and the adjustment groove, respectively. A pusher is provided in the adjustment groove, and the side of the pusher facing the adjustment member is provided with a pusher inclined surface that slides in cooperation with the sliding inclined surface; The cap seat pushes the pusher under the action of the locking mechanism, so that the pushing inclined surface of the pusher slides against the sliding inclined surface of the adjusting member, thereby causing the adjusting member to push the workpiece against the first positioning member and compress the reset member.

8. The positioning fixture as described in claim 6, characterized in that, The first positioning element includes: A fixing body is connected to the bearing member, and the fixing body has a movable groove on the side facing the second positioning member; A movable body, movably disposed in the movable slot; A locking body is threadedly connected to the fixed body and the movable body to adjust the distance of the movable body relative to the second positioning member.

9. The positioning fixture as described in claim 1, characterized in that, The cap seat includes: The cover is provided with a pressing groove that cooperates with the locking mechanism; A pressing member is connected to the cover member, and the pressing member and the pressing groove are located on opposite sides of the cover member. The pressing member is used to press the workpiece. An elastic element, the two ends of which elastically abut against the cover and the pressing element, respectively.

10. The positioning fixture as described in claim 9, characterized in that, The sealing component includes a sealing body and a disassembly body. The sealing body has a through groove, an installation groove and a pressing groove. The through groove passes through the sealing body along the floating direction of the floating component. The installation groove is opened on the surface of the sealing body and communicates with the through groove. The disassembly body can be detachably connected to the sealing body and seals the through groove. The pressing member includes a pressing body and a mounting body. The mounting body is connected to one end of the pressing body and accommodated in the mounting groove. The other end of the pressing body protrudes from the through groove to press the workpiece. The two ends of the elastic member elastically abut against the disassembly body and the pressing body, respectively.

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