Part positioning clamp
By designing part positioning fixtures for automotive parts processing, using gas compression systems for elastic clamping and piston cylinders, the problem of clamping difficulty of special-shaped parts is solved, efficient part positioning and clamping is achieved, and processing costs and scrapping rates are reduced. .
Patent Information
- Application Number
- CN202420605473.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-27
- Publication Date
- 2025-01-17
- Estimated Expiration
- 2034-03-27
AI Technical Summary
During the processing of existing automotive parts, the clamping of special-shaped parts is difficult, resulting in a high processing accuracy deviation and scrapping rate. The use of different fixtures increases manufacturing costs and reduces processing speed.
Design a part positioning fixture including a first positioning mechanism and a second positioning mechanism, and uses elastic clamping and piston cylinder to realize automatic clamping positioning of the parts through gas compression and negative pressure, and combines an adjustable connecting rod and elastic clamping to adapt Parts of different sizes and shapes.
The stable positioning and clamping of parts of different sizes and shapes is achieved, which reduces the scrap rate, improves the processing accuracy and processing rate, and reduces manufacturing costs.
Smart Images
Figure CN222360057U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of automobile parts processing and relates to a parts positioning fixture. Background Art
[0002] A fixture is a device used to fix the workpiece in the mechanical manufacturing process so that it occupies the correct position for construction or inspection. In a broad sense, any device used to quickly, conveniently and safely install the workpiece in any process can be called a fixture.
[0003] Existing automobile sunroofs require a variety of parts during processing and installation, and the processing of these parts often requires multiple processes, which requires fixtures of various shapes. In particular, for workpieces with special shapes such as circular surfaces and inclined surfaces, ordinary fixtures cannot meet the corresponding clamping force, and are prone to loosening during processing, which leads to deviations in the processing accuracy of the workpiece, resulting in an increase in the scrap rate of the workpiece blank. For processing and manufacturing companies, different fixtures increase manufacturing costs, and replacing fixtures takes more time, which reduces the processing rate. Utility Model Content
[0004] The utility model aims to provide a part positioning fixture to realize automatic clamping and positioning of parts with different sizes and shapes.
[0005] In order to achieve the above-mentioned object, the basic scheme of the utility model is: a part positioning fixture, including a first positioning mechanism and a second positioning mechanism of the same structure, the first positioning mechanism and the second positioning mechanism are opposite to each other, and the first positioning mechanism includes an elastic clamp and a piston cylinder;
[0006] The four corners of the elastic splint are hinged with connecting rods, and the connecting rods are all arranged horizontally;
[0007] A piston plate is sealingly and slidingly connected inside the piston cylinder, and the end face of the piston plate faces the elastic clamping plate. A control mechanism for controlling its horizontal reciprocating motion is connected to the piston plate. Four hard pipes are provided on the side of the piston cylinder close to the elastic clamping plate. The hard pipes are horizontally arranged, and the pipe mouths of the hard pipes are directly opposite to the connecting rod. The end of the connecting rod away from the elastic clamping plate extends into the hard pipe and is sealingly and slidingly connected to the inner wall of the hard pipe. The end of the hard pipe close to the piston cylinder is connected to the piston cylinder through a soft air pipe, and the piston cylinder located on the side of the piston plate close to the elastic clamping plate contains gas.
[0008] The working principle and beneficial effects of this basic solution are: the first positioning mechanism and the second positioning mechanism are directly opposite, so as to clamp and position the parts placed between the first positioning mechanism and the second positioning mechanism. The control mechanism controls the piston plate to move in the piston cylinder. The movement of the piston plate changes the air pressure on the side of the piston plate close to the elastic splint in the piston cylinder, thereby squeezing the gas into the hard pipe, or forming a negative pressure to suck the gas in the hard pipe into the piston cylinder. The gas enters the hard pipe, pushing the connecting rod in the hard pipe to move outward, and the connecting rod is connected to the elastic splint. The movement of the connecting rod drives the elastic splint to move until the position where the elastic splint is connected to the connecting rod is against the part or another opposite elastic splint, so that the elastic splint fits the part, and the control mechanism controls the piston plate to stop moving. The first positioning mechanism and the second positioning mechanism are started synchronously, so that the elastic splints set by the two can fit synchronously with the part to achieve the clamping and positioning of the part.
[0009] At the same time, the elastic splint has a certain elastic ductility. For square parts, the four connecting rods connected by the elastic splint extend to the same length, so that the elastic splint remains parallel to the side wall of the part until it fits the outer wall of the part, abuts against the outer wall of the part, or the corners of the two opposite elastic splints abut against each other. When positioning special-shaped parts, the connection between the elastic splint and each connecting rod needs to abut against the outer wall of the part or the opposite elastic splint. The length of the connecting rod can be the same or different. Only when all the connections are in a pressing state, the control mechanism stops the movement of the piston plate, and the elastic splint can be elastically deformed and tilted, stretched or bent with the driving of the connecting rod, ensuring that the elastic splint fits the outer wall of the part and enhancing the stability of the angle positioning. The length of the connecting rod can be adjusted, which can control the position of the elastic splint, thereby adjusting the size between the two elastic splints to achieve the clamping of parts of different sizes. The elastic splint has an elastic clamping force on the parts, which is relatively flexible, avoiding bumps and damage to the outer wall of the parts.
[0010] Furthermore, the elastic splint includes two main boards and an extension plate located between the main boards, a mezzanine is provided inside the main board, slide grooves are provided on both sides of the mezzanine, the opposite sides of the two main boards are open, both ends of the extension plate extend into the corresponding main boards respectively, and both sides of the end of the extension plate are fixedly connected with sliders slidably connected to the slide grooves, and a spring is connected between the end of the slide groove close to the inner side of the mezzanine and the slider.
[0011] The elastic clamp is provided with an extension plate, so that the size range of the elastic clamp that can be deformed is expanded, thereby expanding the size range of parts that can be clamped by the elastic clamp, making the elastic clamp more convenient to use.
[0012] Furthermore, a normally closed opening button is provided at the connection between the connecting rod and the elastic clamping plate, the switch buttons are arranged in parallel, and the total output end of the switch buttons is connected to the power supply end of the control mechanism.
[0013] In this way, when the connection between the connecting rod and the elastic clamp is against the outer wall of the part or the relative elastic clamp, the switch button is pressed and changes from a normally closed state to an open state. When all the switch buttons are in the open state, the power supply end of the control mechanism and the power supply connected to it are in a circuit-breaking state, and the control mechanism stops automatically.
[0014] Furthermore, the four corners of the elastic clamp are fixedly connected with a connecting block, the end surface of the connecting block is hinged to the end of the connecting rod, and the switch button is arranged on the end surface of the connecting block away from the connecting rod.
[0015] The additional connection block is provided to facilitate the installation of the elastic clamp and the connection rod. Compared with the direct connection between the elastic clamp and the connection rod, the connection structure is prevented from affecting the control of the elastic clamp by the connection rod.
[0016] Furthermore, it also includes a workbench, which is located between the first positioning mechanism and the second positioning mechanism, and a placement groove is provided on the workbench.
[0017] The workbench is used to place parts, and the placement slot facilitates the initial positioning of the parts, which is beneficial for subsequent angle operations.
[0018] Furthermore, at least one pair of oppositely disposed side walls of the placement groove is provided with a plurality of steps.
[0019] It is convenient to place parts of different sizes on steps at different horizontal positions, and it is also more conducive to controlling the parts to be placed at the center of the placement slot 7 for easy positioning. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a front cross-sectional view of the first positioning mechanism of the part positioning fixture of the utility model;
[0021] Figure 2 It is a top sectional view of the first positioning mechanism of the part positioning fixture of the utility model.
[0022] The figure marks in the drawings of the specification include: elastic splint 1, connecting rod 2, hard pipe 3, piston cylinder 4, piston plate 5, workbench 6, placement groove 7, connecting block 8, extension plate 9, soft air pipe 10, switch button 11. DETAILED DESCRIPTION
[0023] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0024] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0025] In the description of the present utility model, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection of two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.
[0026] like Figure 1 and 2 As shown, the utility model discloses a part positioning fixture, comprising a first positioning mechanism and a second positioning mechanism, the first positioning mechanism and the second positioning mechanism are directly opposite to each other, and the second positioning mechanism has the same structure as the first positioning mechanism.
[0027] The first positioning mechanism includes an elastic clamping plate 1 and a piston cylinder 4. The elastic clamping plate 1 is preferably made of plastic or rubber. The four corners of the elastic clamping plate 1 are hinged with a connecting block 8. A connecting rod 2 is welded to the end face of one side of the connecting block 8. The connecting rod 2 is arranged horizontally and perpendicular to the end face of the connecting block 8. A switch button 11 is installed on the side of the connecting block 8 away from the connecting rod 2. The opening button is in a normally closed state. The switch buttons 11 are arranged in parallel. A piston plate 5 is sealingly and slidably connected in the piston cylinder 4. The end face of the piston plate 5 faces the elastic clamping plate 1. The piston plate 5 is connected to a control mechanism ( Figure 1 and 2 The control mechanism is preferably, but not limited to, a hydraulic cylinder with an additional valve, which is used for pressure-maintaining self-locking. The power supply end of the control mechanism is connected to a power supply, the total output end of each parallel switch button 11 is electrically connected to the power supply end of the control mechanism, and the total input end of each parallel switch button 11 is electrically connected to the power supply. The piston cylinder 4 is provided with four hard pipes 3 on one side close to the elastic clamping plate 1. The hard pipes 3 are connected to the bracket ( Figure 1 and 2The connecting bracket is provided with a stopper to limit the movement of the hard pipe 3 along the axis. The pipe opening of the hard pipe 3 is directly opposite to the connecting rod 2. The end of the connecting rod 2 away from the elastic clamping plate 1 extends into the hard pipe 3 and is sealed and slidably connected with the inner wall of the hard pipe 3. The end of the hard pipe 3 close to the piston cylinder 4 is connected to the piston cylinder 4 through a soft air pipe 10. The piston cylinder 4 located on the side of the piston plate 5 close to the elastic clamping plate 1 contains gas.
[0028] In a preferred embodiment of the utility model, the elastic splint 1 includes two main boards and an extension board 9 located between the main boards, wherein a sandwich is provided inside the main board, and slide grooves are provided on both sides of the sandwich, and the opposite sides of the two main boards are open. The two ends of the extension board 9 extend into the corresponding main board from the openings, and sliders slidably connected to the slide grooves are welded on both sides of the end of the extension board 9, and a spring is connected between the end of the slide groove close to the inner side of the sandwich and the slider, and one end of the spring is welded to the slider, and the other end of the spring is welded to the end of the slide groove away from the opening.
[0029] In a preferred embodiment of the utility model, the part positioning fixture also includes a workbench 6, which is located between the first positioning mechanism and the second positioning mechanism. A placement groove 7 is provided on the workbench 6. The side walls of the placement groove 7 can preferably be set to a stepped shape. A number of steps are set on the two side walls relatively arranged on the placement groove, which is convenient for placing parts of different sizes on steps at different horizontal positions. At the same time, it is more conducive to controlling the parts to be placed in the center position of the placement groove 7 for easy positioning.
[0030] Specific operation process: Place the part vertically in the placement groove 7 of the workbench 6, the first positioning mechanism and the second positioning mechanism are respectively located on one side of the part, and the first positioning mechanism and the second positioning mechanism are at an equal distance from the part. The control mechanism in the first positioning mechanism and the second positioning mechanism is started synchronously, and the control mechanism controls the piston plate 5 to move to the side close to the part. The piston plate 5 moves to squeeze the gas in the piston cylinder 4, and the gas enters the hard pipe 3 through the soft air pipe 10, pushing the connecting rod 2 in the hard pipe 3 to move to the side close to the part. The connecting rod 2 drives the elastic clamping plate 1 connected to it to move to the side where the part is located. Until the switch button 11 set on the connecting block 8 abuts against the outer wall of the part, or the switch buttons 11 on the relatively set connecting blocks 8 abut against each other, and the switch buttons 11 are all in the open state, the control mechanism is powered off and automatically stops. At this time, the elastic clamping plate 1 driven by the connecting rod 2 in the first positioning mechanism and the second positioning mechanism is in contact with the outer wall of the part, realizing the angle positioning of the part.
[0031] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0032] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.
Claims
1. A parts positioning fixture, characterized in that: It comprises a first positioning mechanism and a second positioning mechanism of the same structure, the first positioning mechanism and the second positioning mechanism are directly opposite to each other, and the first positioning mechanism comprises an elastic clamping plate and a piston cylinder; The four corners of the elastic splint are hinged with connecting rods, and the connecting rods are all arranged horizontally; A piston plate is sealingly and slidingly connected inside the piston cylinder, and the end face of the piston plate faces the elastic clamping plate. A control mechanism for controlling its horizontal reciprocating motion is connected to the piston plate. Four hard pipes are provided on the side of the piston cylinder close to the elastic clamping plate. The hard pipes are horizontally arranged, and the pipe mouths of the hard pipes are directly opposite to the connecting rod. The end of the connecting rod away from the elastic clamping plate extends into the hard pipe and is sealingly and slidingly connected to the inner wall of the hard pipe. The end of the hard pipe close to the piston cylinder is connected to the piston cylinder through a soft air pipe, and the piston cylinder located on the side of the piston plate close to the elastic clamping plate contains gas.
2. The part positioning fixture according to claim 1, characterized in that: The elastic splint includes two main boards and an extension plate located between the main boards. A mezzanine is provided inside the main board, and slide grooves are provided on both sides of the mezzanine. The opposite sides of the two main boards are open, and the two ends of the extension plate extend into the corresponding main boards respectively. Slide blocks slidably connected to the slide grooves are fixedly connected to the two sides of the end of the extension plate, and a spring is connected between the end of the slide groove close to the inner side of the mezzanine and the slide block.
3. The part positioning fixture according to claim 1, characterized in that: A normally closed opening button is provided at the connection between the connecting rod and the elastic clamping plate, the switch buttons are arranged in parallel, and the total output end of the switch buttons is connected to the power supply end of the control mechanism.
4. The part positioning fixture according to claim 1 or 3, characterized in that: The four corners of the elastic clamp are fixedly connected with a connecting block, the end surface of the connecting block is hinged to the end of the connecting rod, and the switch button is arranged on the end surface of the connecting block away from the connecting rod.
5. The part positioning fixture according to claim 1, characterized in that: The invention also comprises a workbench, which is located between the first positioning mechanism and the second positioning mechanism, and the workbench is provided with a placement groove.
6. The part positioning fixture according to claim 5, characterized in that: At least one pair of oppositely disposed side walls of the placement groove is provided with a plurality of steps.