A device for automatic de-positioning gap

Abstract

The utility model relates to a device of automatic deposition gap, relates to workpiece positioning device among machining, including base, floating seat, side face compression jack, lower pressure contact pad, floating seat is hinged on the base through the axle pin, lower pressure contact pad is installed in one end of floating seat, side face compression jack is horizontally installed in the top rod installation hole of floating seat middle part, and the compression spring II for providing the thrust of side face compression jack to workpiece side is set up on side face compression jack, and the compression spring I of driving floating seat reset is still installed on the base. The utility model has adopted this lower pressure side push linkage structure, when workpiece contacts lower pressure contact pad and presses it down, side face compression jack contacts workpiece side simultaneously, and workpiece is pushed to the corresponding direction by the thrust of spring, thereby can automatically eliminate the gap between workpiece positioning hole and positioning pin, can control positioning accuracy in very small range, effectively improve size accuracy, reduce the risk of scratching workpiece surface, still have efficient clamping, wide application range and the like characteristics.

Description

Technical Field

[0001] This utility model relates to a workpiece positioning device in machining, and more particularly to a device for automatically eliminating positioning gaps. Background Technology

[0002] In the machining and assembly of automotive parts, due to the numerous dimensions in the product drawings and the varying precision requirements for each dimension, coupled with constraints from multiple factors such as equipment performance, processing technology, cost control, and production efficiency, it is essential to rationally decompose some machining dimensions and process them in stages according to dimensional grade and process requirements. Specifically, dimensions with lower precision requirements are machined using equipment of ordinary precision; dimensions with higher precision requirements are machined using equipment with higher positioning accuracy to ensure compliance with the specifications in the product drawings. However, in actual production, workpiece positioning devices generally employ a rigid locating pin that engages with the workpiece positioning hole. Due to manufacturing tolerances, a certain gap often exists between the locating pin and the workpiece positioning hole. This can cause displacement of the workpiece during machining or assembly, thereby affecting the dimensional accuracy and performance stability of the product.

[0003] Current clearance-removing devices typically use elastic steel ball or plunger-type positioning pins. During workpiece clamping, the positioning pins are always extended, requiring the product to be brought into contact with the top of the positioning pins and then pressed down to clamp the workpiece in place. This process can easily scratch the workpiece. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide an automatic positioning gap removal device to solve the problem of insufficient accuracy and easy scratching of workpieces caused by the positioning gap in existing workpiece positioning devices.

[0005] The technical solution to the above-mentioned technical problem is: an automatic positioning gap removal device, comprising a base, a floating seat, a side clamping top rod, and a downward pressure contact pad; the floating seat is hinged to the base via a shaft pin; the downward pressure contact pad is installed at one end of the floating seat, and under normal conditions, the height of the downward pressure contact pad is higher than the support surface of the fixture support block on which the workpiece is installed; the side clamping top rod is horizontally installed in the top rod mounting hole in the middle of the floating seat, and a compression spring II is sleeved on the side clamping top rod to provide a thrust for pushing it to the side of the workpiece; a compression spring I for driving the floating seat to reset is also installed on the base.

[0006] A further technical solution of this utility model is: under normal conditions, the pressure contact pad is in a raised and tilted state, and the pressure contact pad is 1.5 to 2.5 mm higher than the support surface of the clamp support block.

[0007] A further technical solution of this utility model is: the floating seat is provided with a limiting groove below the pressure contact pad, the base is provided with a spring limiting hole corresponding to the position of the limiting groove, and the two ends of the compression spring I are respectively located in the spring limiting hole and the limiting groove.

[0008] A further technical solution of this utility model is: the head of the side clamping push rod is a hemispherical structure, and under normal conditions, the end face of the head of the side clamping push rod and the side of the workpiece maintain a gap of .~.mm; the tail of the side clamping push rod passes through the push rod mounting hole and is limited by the shaft retaining ring II, and the end face of the tail of the side clamping push rod and the shaft retaining ring II maintain a gap of greater than 1.5~2.5mm.

[0009] A further technical solution of this utility model is: the mounting hole of the top rod is a stepped through hole; the rod body of the side pressing top rod is composed of a thick rod section and a thin rod section; the compression spring II is sleeved on the thin rod section of the side pressing top rod, and one end of the compression spring II abuts against the end face of the thick rod section of the side pressing top rod, and the other end abuts against the bottom of the large end hole of the top rod mounting hole.

[0010] A further technical solution of this utility model is: the base is provided with ear plates on both sides, the floating seat is hinged to the ear plates by a shaft pin, and the ends of the shaft pin are provided with slots, in which shaft retaining rings I are installed.

[0011] A further technical solution of this utility model is: the base is also provided with a height-adjustable limiting pin below the other end of the floating seat, which is used to limit the downward tilting height of the other end of the floating seat.

[0012] A further technical solution of this utility model is: the base is provided with a threaded hole, and the lower end of the limiting pin is provided with an external thread, and the limiting pin is installed on the base plate by a threaded connection.

[0013] Due to the above structure, the automatic gap-removing device of this utility model has the following advantages compared with the prior art:

[0014] 1. High-precision positioning:

[0015] This utility model includes a base, a floating seat, a side-clamping top rod, and a downward-pressing contact pad. The floating seat is hinged to the base via a pivot pin. The downward-pressing contact pad is installed at one end of the floating seat. The side-clamping top rod is horizontally installed in the top rod mounting hole in the middle of the floating seat. A compression spring II is sleeved on the side-clamping top rod to provide a pushing force to push it towards the side of the workpiece. The base is also equipped with a compression spring I to drive the floating seat to reset. This utility model adopts the above-mentioned unique downward-pressing and side-pushing linkage structure. In normal state, the downward-pressing contact pad is in an upward-tilted state, with its height higher than the support surface of the clamping support block. When the workpiece is clamped onto the clamping support block, it also contacts the downward-pressing contact pad and presses it down. The side-clamping top rod simultaneously contacts the side of the workpiece, and the spring's thrust pushes the product to the corresponding direction, thereby automatically eliminating the gap between the workpiece positioning hole and the positioning pin. This allows the positioning accuracy to be controlled within a very small range of 0.015-0.03 mm, effectively improving the dimensional accuracy of the workpiece during processing or assembly and enhancing the stability of product quality.

[0016] 2. Protect the workpiece surface:

[0017] The downward pressure and side push linkage structure design of this application achieves the purpose of automatic clearance elimination, avoiding the hard contact between the workpiece and the positioning structure during clamping in conventional clearance elimination structures, reducing the risk of scratches on the workpiece surface, which is of great significance for workpieces with high surface quality requirements, and can improve the yield and appearance quality of products.

[0018] 3. High-efficiency clamping:

[0019] This application can complete the positioning and gap elimination operations with a single clamping, and the automatic lifting function during part removal reduces the operator's part removal time, greatly improving production efficiency, and is especially suitable for mass production scenarios.

[0020] 4. Wide range of applications

[0021] This application can significantly improve the assembly accuracy of workpieces and ensure their performance. It is applicable not only to the production of clutch housings for automotive parts, but also to the production of precision instrument workpieces such as mounting brackets for optical lenses and metal housings for electronic devices.

[0022] The technical features of an automatic gap-removing device of the present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0023] Figure 1 : Front view of an automatic gap-removing device according to this utility model.

[0024] Figure 2 : Figure 1 Top view,

[0025] Figure 3 : Figure 1 Left view,

[0026] Figure 4 : Figure 3 AA section view,

[0027] Figure 5 : A three-dimensional structural diagram of an automatic gap-removing device according to this utility model Figure 1 ,

[0028] Figure 6 : A three-dimensional structural diagram of an automatic gap-removing device according to this utility model Figure 2 ,

[0029] Figure 7 A three-dimensional structural diagram of an automatic gap-removing device of this utility model with a workpiece installed on it.

[0030] In the above figures, the reference numerals are explained as follows:

[0031] 1-Base, 101-Spring limiting hole, 102-Ear plate, 103-Threaded hole,

[0032] 2-Floating seat, 201-Top rod mounting hole, 202-Limiting groove,

[0033] 3-Side clamping rod, 4-Pressing contact pad, 5-Limiting pin, 6-Compression spring I

[0034] 7-Compression spring II, 8-Shaft pin, 9-Shaft retaining ring I, 10-Shaft retaining ring II

[0035] 11- Fixture support block, 12- Workpiece. Detailed Implementation Example 1

[0036] An automatic gap-removing device includes a base 1, a floating seat 2, a side-clamping rod 3, and a downward-pressing contact pad 4; wherein:

[0037] The base 1 has a spring limiting hole 101 at one end and a threaded hole 103 at the other end. The base 1 also has ear plates 102 on both sides of the middle part, and the ear plates 102 have shaft pin holes I. The base 1 is fixed on the workbench or fixture base plate of the processing equipment, providing a stable support foundation for the entire device.

[0038] The floating seat 2 has an inverted T-shaped structure. The upper part of the middle of the floating seat 2 is provided with a horizontal top rod mounting hole 201, which is a stepped through hole. The lower part of the middle of the floating seat 2 is provided with a shaft pin hole II. The floating seat 2 is hinged to the ear plate 102 of the base 1 by a shaft pin 8 passing through the shaft pin hole II and the shaft pin hole I, so that the floating seat 2 can rotate flexibly around the shaft pin 8. The two ends of the shaft pin 8 are provided with slots, and a shaft retaining ring I9 is ​​installed in the slots. One end of the floating seat 2 is provided with a pressure contact pad mounting hole at the upper part and a limiting groove 202 at the lower part. The position of the limiting groove 202 corresponds to the position of the spring limiting hole 101 of the base 1. The two ends of the compression spring I6 are respectively installed in the spring limiting hole 101 and the limiting groove 202. The upper end of the other end of the floating seat 2 is inclined downward.

[0039] The side-clamping push rod 3 is horizontally installed in the push rod mounting hole 201 in the middle of the floating seat 2. The head of the side-clamping push rod 3 has a hemispherical structure, and the rod body of the side-clamping push rod 3 is composed of a thick rod section and a thin rod section. Under normal conditions, the head of the side-clamping push rod 3 protrudes from the push rod mounting hole 201, and a gap of 1.5 to 2.5 mm is maintained between the end face of the head of the side-clamping push rod 3 and the side of the workpiece 12—the side of the automobile clutch housing. A compression spring II 7 is sleeved on the thin rod section of the side-clamping push rod 3. One end of the compression spring II 7 abuts against the end face of the thick rod section of the side-clamping push rod 3, and the other end abuts against the bottom of the large end hole of the push rod mounting hole 201. In the initial state, the compression spring II 7 is in a pre-compressed state, providing a thrust for the side-clamping push rod 3 to push towards the side of the workpiece. The tail end of the thin rod section of the side clamping top rod 3 protrudes out of the top rod mounting hole 201 and is limited by the shaft retaining ring II10 installed thereon. A gap of more than 1.5 to 2.5 mm is maintained between the end face of the tail end of the thin rod section of the side clamping top rod 3 and the shaft retaining ring II10.

[0040] The pressure contact pad 4 is installed in the pressure contact pad mounting hole at one end of the floating seat 2. Under normal conditions, due to the compression spring I6 supporting the floating seat 2, the pressure contact pad 4 is in a raised state, and its height is 1.5 to 2.5 mm higher than the support surface of the clamp support block 11 for installing the workpiece.

[0041] The limiting pin 5 is located below the other end of the floating seat 2. The lower end of the limiting pin 5 is provided with external thread and is installed on the threaded hole 103 of the base plate 1 through threaded connection. Since it is a threaded connection, the limiting pin 5 can be height-adjustable, thereby limiting the downward tilt height of the other end of the floating seat 2 and ensuring the stability of the entire positioning device during operation.

[0042] The installation and use process of this utility model is as follows:

[0043] Installation process: Fix base 1 on the corresponding fixture base plate. Maintain a gap of 1.5-2.5mm between the head end face of the side clamping push rod 3 and the workpiece 12 to be moved—the automotive clutch housing. Screw the limit pin 4 into the corresponding threaded hole 103 of base 1 and tighten it to ensure the height matches the drawing. Install the compression spring I6 into the spring limit hole 101 of the base plate. Align the shaft pin hole II of the floating seat 2 with the shaft pin hole I on the base ear plate, and insert the upper end of the compression spring I6 into the corresponding limit groove 202. Insert the shaft pin 8 from the side and install the shaft retaining ring I9 in the slots at both ends of the shaft pin 8. Install the pressure contact pad 4 into the pressure contact pad mounting hole of the floating seat 2, ensuring it is secure and does not fall off. Install the compression spring II7 onto the thin rod section of the side clamping push rod 3, and then install the assembly into the push rod mounting hole 201. Install the shaft retaining ring II10 at the tail of the thin rod section of the side clamping push rod 3.

[0044] Usage: When it is necessary to position workpiece 12, place workpiece 12 on the fixture support block 11. The weight of the workpiece or external force will press down on the contact pad 4. After the contact pad 4 is subjected to pressure, it drives the floating seat 2 to rotate around the shaft pin 8. The rotation of the floating seat 2 releases the restriction on the side clamping rod 3, so that the side clamping rod 3 moves towards the side of the workpiece under the thrust of the compression spring II 7 until it contacts the workpiece 12 and pushes the workpiece 12 towards the positioning reference direction, thereby eliminating the gap between the workpiece positioning hole and the positioning pin.

[0045] When picking up the workpiece, after removing the workpiece 12, the spring force of the pressure contact pad 4 causes the floating seat 2 to reset, the pressure contact pad 4 to rise, and at the same time slightly lifts the workpiece, making it easier for the operator to pick up the workpiece quickly.

Claims

1. A device for automatically eliminating positioning gaps, characterized in that: The device includes a base (1), a floating seat (2), a side pressing rod (3), and a downward pressing contact pad (4). The floating seat (2) is hinged to the base (1) by a shaft pin (8). The downward pressing contact pad (4) is installed at one end of the floating seat (2). Under normal conditions, the height of the downward pressing contact pad (4) is higher than the support surface of the fixture support block (11) for installing the workpiece. The side pressing rod (3) is horizontally installed in the rod mounting hole (201) in the middle of the floating seat (2). A compression spring II (7) is sleeved on the side pressing rod (3) to provide a thrust to push it to the side of the workpiece. A compression spring I (6) is also installed on the base (1) to drive the floating seat (2) to reset.

2. The device for automatically eliminating positioning gaps according to claim 1, characterized in that: Under normal conditions, the pressure contact pad (4) is in an upward tilted state, and the pressure contact pad (4) is 1.5 to 2.5 mm higher than the support surface of the clamp support block (11).

3. The device for automatically eliminating positioning gaps according to claim 1, characterized in that: The floating seat (2) is provided with a limiting groove (202) below the pressure contact pad (4), and the base (1) is provided with a spring limiting hole (101) corresponding to the position of the limiting groove (202). The two ends of the compression spring I (6) are respectively located in the spring limiting hole (101) and the limiting groove (202).

4. The device for automatically eliminating positioning gaps according to claim 1, characterized in that: The head of the side clamping top rod (3) is a hemispherical structure, and under normal conditions, the end face of the head of the side clamping top rod (3) and the side of the workpiece maintain a gap of 1.5 to 2.5 mm; the tail of the side clamping top rod (3) passes through the top rod mounting hole (201) and is limited by the shaft retaining ring II (10), and the end face of the tail of the side clamping top rod (3) and the shaft retaining ring II (10) maintain a gap of more than 1.5 to 2.5 mm.

5. The device for automatically eliminating positioning gaps according to claim 4, characterized in that: The top rod mounting hole (201) is a stepped through hole; the rod body of the side pressing top rod (3) is composed of a thick rod section and a thin rod section; the compression spring II (7) is sleeved on the thin rod section of the side pressing top rod (3), and one end of the compression spring II (7) abuts against the end face of the thick rod section of the side pressing top rod (3), and the other end abuts against the bottom of the large end hole of the top rod mounting hole (201).

6. The device for automatically eliminating positioning gaps according to claim 1, characterized in that: The base (1) is provided with ear plates (102) on both sides. The floating seat (2) is hinged to the ear plates (102) by a shaft pin (8). The two ends of the shaft pin (8) are provided with slots, and a shaft retaining ring I (9) is installed in the slot.

7. The device for automatically eliminating positioning gaps according to claim 1, characterized in that: The base (1) also has a height-adjustable limiting pin (3) below the other end of the floating seat (2) for limiting the downward tilting height of the other end of the floating seat (2).

8. The device for automatically eliminating positioning gaps according to claim 7, characterized in that: The base (1) is provided with a threaded hole (103), and the lower end of the limiting pin (3) is provided with an external thread. The limiting pin (3) is installed on the base plate (1) by threaded connection.

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