Hydraulic pull-down type centering clamping device

Abstract

The utility model discloses a hydraulic pull-down type centering clamping device which comprises a bottom plate. The body is arranged in the middle of the upper side of the bottom plate, a pull rod sleeve is vertically arranged in the center of the body, a plurality of chucks are arranged on the periphery of the pull rod sleeve in the circumferential direction, a rear cover is detachably arranged at the bottom of the body, and limiting columns are arranged on the upper side of the rear cover and located between the adjacent chucks. A plurality of pull rods are uniformly arranged on the body around the pull rod sleeve, and a pull rod adjusting mechanism is arranged on the side wall of the body; the double-acting oil cylinder is arranged at the bottom of the bottom plate, and the movable end of the double-acting oil cylinder is connected with the pull rod sleeve; the product supporting seat is fixedly arranged in the middle of the upper end face of the body; and the clamping block is detachably arranged at the upper part of the pull rod. The clamping device can solve the problems that an existing clamping device is complex in structure, inconvenient to operate and low in positioning precision.

Description

Technical Field

[0001] The utility model relates to the technical field of positioning and clamping of automobile parts, in particular to a hydraulic pull-down type centering clamping device. Background Art

[0002] During the machining, assembly and testing process, the fixing and positioning of cylindrical parts such as motor housings and valve bodies have an important impact on product quality and processing efficiency. The existing fixing and positioning devices for cylindrical parts such as motor housings and valve bodies cannot design positioning benchmarks, which makes it difficult to position and clamp the products during machining. At the same time, positioning features are required to ensure the positioning accuracy and repeat positioning accuracy of the product to meet the tolerance requirements. Unreasonable positioning methods will cause the product to be under-positioned or over-positioned, and poor repeat positioning accuracy will lead to large errors in the workpiece sequencing processing. In order to solve the above problems, a new type of hydraulic pull-down centering clamping device is designed. Utility Model Content

[0003] The utility model provides a hydraulic pull-down centering clamping device, which can solve the problems of complex structure, inconvenient operation and low positioning accuracy of the existing clamping device.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hydraulic pull-down centering clamping device, comprising a base plate; a body, which is arranged in the middle of the upper side of the base plate, a pull rod sleeve is vertically arranged at the center of the body, and a plurality of chucks extending outward are arranged along the circumferential direction on the outer periphery of the pull rod sleeve, a rear cover is detachably arranged at the bottom of the body, and a limit column extending upward is arranged on the upper side of the rear cover between adjacent chucks, and a plurality of pull rods are arranged on the outer side of the chuck on the body, The pull rod is arranged obliquely, and the pull rod is slidably connected to the main body. A pull rod adjustment mechanism abutting against the pull rod is arranged on the side wall of the main body; a double-acting oil cylinder is arranged at the bottom of the base plate, and the movable end of the double-acting oil cylinder is connected to the pull rod sleeve; a product support seat is fixedly arranged in the middle of the upper end surface of the main body; a clamping block is detachably arranged on the upper part of the pull rod, and the space surrounded by multiple clamping blocks is located on the upper side of the product support seat for placing products, with high positioning accuracy, convenient loading and unloading, and simple structure.

[0005] Preferably, a pressure pin is detachably provided on the inner side of the clamping block. The separate design of the pressure pin and the clamping block facilitates the adjustment of the precision and is also convenient for replacement after the pressure pin is worn.

[0006] Preferably, a groove matching the chuck is provided at the bottom of the pull rod, and the groove is used for clamping the chuck, which is convenient for installation.

[0007] Preferably, the upper and lower ends of the pull rod sleeve are slidably connected with bushings, and the bushings can maintain the concentricity of the pull rod sleeve when it moves up and down.

[0008] Preferably, the pull rod adjustment mechanism includes an adjustment screw arranged inside the main body, a spring is sleeved on the adjustment screw, a contact ball is provided at one end of the adjustment screw close to the pull rod, the spring abuts against the contact ball, and the fitting depth between the slot and the chuck is adjusted by the pull rod adjustment mechanism.

[0009] Preferably, anti-error pins are vertically arranged on the front and rear sides of the product support seat, an air nozzle is arranged on one side of the anti-error pin, and a limit block is arranged on the upper side of the main body near the anti-error pin. The anti-error pin and the limit block can roughly position the product, and the air nozzle can flush the processing position during machining to avoid the residue of debris and cool the tool at the same time.

[0010] Preferably, a truncated cone is provided at the upper end of the product support seat, at least one air hole is provided on the truncated cone, and an air inlet groove connected to the air hole is provided on the side wall of the product support seat, so that air is introduced through the air inlet groove to perform air inspection on the end face of the product.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] It has the characteristics of high positioning accuracy, simple structure, easy disassembly and assembly, stable fit of the positioning surface by pull-down clamping, convenient loading and unloading, and ensuring safety during automatic loading and unloading. It can solve the problems of complex structure, inconvenient operation and low positioning accuracy of existing clamping devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0014] Figure 2 It is a cross-sectional view of the utility model;

[0015] Figure 3 It is a three-dimensional structural diagram of the main body of the utility model;

[0016] Figure 4 It is a schematic diagram of the installation structure of the pull rod sleeve and the pull rod of the utility model;

[0017] Figure 5 It is a partial enlarged cross-sectional view of the pull rod adjustment mechanism of the utility model;

[0018] Figure 6 It is a three-dimensional structural diagram of the product support seat of the utility model.

[0019] Reference numerals:

[0020] 1. Base plate, 2. Main body, 21. Limiting groove, 3. Pull rod sleeve, 4. Chuck, 5. Back cover, 6. Limiting column, 7. Pull rod, 71. Slotting, 8. Pull rod adjustment mechanism, 81. Spring, 82. Adjusting screw, 83. Contact ball, 9. Double-acting cylinder, 10. Product support seat, 101. Round table, 102. Air hole, 103. Air inlet groove, 11. Clamping block, 12. Press pin, 13. Bushing, 14. Air nozzle, 15. Limiting block, 16. Anti-misalignment pin. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0022] like Figure 1-6 As shown, in order to solve the problems of complex structure, inconvenient operation and low positioning accuracy of the existing clamping devices, the utility model provides the following technical solutions: a hydraulic pull-down centering clamping device, comprising a base plate 1, and lifting rings are arranged at the four corners of the base plate 1 for easy carrying; a main body 2, which is arranged in the middle of the upper side of the base plate 1, and a pull rod sleeve 3 is vertically arranged at the center of the main body 2, and the pull rod sleeve 3 can move up and down along the main body 2, and the outer periphery of the pull rod sleeve 3 is provided with three outwardly extending chucks 4 along the circumferential direction, and the chuck 4 is a fan-shaped structure, and the pull rod sleeve 3 and the chuck 4 are integrally formed, and the bottom of the main body 2 is detachably provided with a rear cover 5, and the upper side of the rear cover 5 is provided with an upwardly extending limit column 6 between adjacent chucks 4, and the rear cover 5 and the limit column 6 are integrally formed, and the limit column 6 prevents the chuck 4 from rotating, and the outer side of the chuck 4 on the main body 2 is provided with Three tie rods 7, the tie rods 7 are tilted and slidably connected to the main body 2, and a tie rod adjustment mechanism 8 abutting against the tie rods 7 is provided on the side wall of the main body 2; a double-acting oil cylinder 9 is arranged at the bottom of the base plate 1, and the movable end of the double-acting oil cylinder 9 is connected to the tie rod sleeve 3; a product support seat 10, which is fixedly arranged in the middle of the upper end surface of the main body 2; a clamping block 11, which is detachably arranged on the upper part of the tie rod 7, and the bottom of the clamping block 11 and the top of the tie rod 7 are provided with grooves and protrusions that are perpendicular to each other, and a two-way keyway is adopted to ensure sufficient accuracy and rigidity. The space surrounded by multiple clamping blocks 11 is located on the upper side of the product support seat 10 for placing cylindrical products such as motor housings and valve bodies, and is pulled down and retracted at the same time. When clamping the workpiece, the workpiece is subjected to both radial force and axial force, with high positioning accuracy, convenient loading and unloading, and simple structure.

[0023] In this embodiment, if Figure 2-3As shown, the upper end of the main body 2 is located at the bottom of the product support seat 11 and is provided with a top cover 17. The bottom of the main body 2 is provided with a limiting groove 21. The upper and lower moving distances of the chuck 4 are limited by the limiting groove 21. Clamping in the absence of a product will not damage the product support seat 11.

[0024] In this embodiment, if Figure 4 As shown, a pressure pin 12 is detachably provided on the inner side of the clamping block 11. The pressure pin 12 and the clamping block 11 are designed to be separated to facilitate the adjustment of the precision, and the pressure pin 12 is also easy to replace after being worn.

[0025] In this embodiment, if Figure 4 As shown, a slot 71 matching the chuck 4 is provided at the bottom of the pull rod 7, and the slot 71 is used for clamping the chuck 4, which is convenient for installation.

[0026] In this embodiment, if Figure 2 As shown, the upper and lower ends of the pull rod sleeve 3 are both slidably connected with bushings 13, and the bushings 13 can maintain the concentricity of the pull rod sleeve 3 when it moves up and down.

[0027] In this embodiment, if Figure 5 As shown, the pull rod adjustment mechanism 8 includes an adjusting screw 82 arranged inside the main body 2, and a spring 81 is sleeved on the adjusting screw 82. A contact ball 83 is arranged at one end of the adjusting screw 82 close to the pull rod 7, and the spring 81 abuts against the contact ball 83. The adjusting screw 82 can be fine-tuned, and the fitting depth between the slot 71 and the chuck 4 can be adjusted by the adjusting screw 82.

[0028] In this embodiment, if Figure 1 As shown, anti-error pins 16 are vertically arranged on the front and rear sides of the product support seat 10, and an air nozzle 14 is arranged on one side of the anti-error pin 16. A limiting block 15 is arranged on the upper side of the main body 2 near the anti-error pin 16, and a limiting portion matching the product is arranged on the upper end of the limiting block 15. The anti-error pin 16 and the limiting block 15 can roughly position the product and provide additional positioning guarantee. The air nozzle 14 can flush the processing position during machining to avoid the residue of debris and cool the tool at the same time.

[0029] In this embodiment, if Figure 6 As shown, a truncated cone 101 is provided at the upper end of the product support seat 10, and four air holes 102 are arranged at intervals along the circumferential direction on the truncated cone 101. Two air inlet grooves 103 connected with the air holes 102 are perpendicularly arranged on the side walls of the product support seat 10, and air is introduced through the air inlet grooves 103 to perform air inspection on the end face of the product.

[0030] Among them, in this clamping device, sealing rings are provided at the bushing 13, the pull rod 7, the limit groove 21, the rear cover 5, and the adjusting screw 82, which can effectively prevent cutting fluid, dust, aluminum chips and other impurities from entering the interior of the device to ensure that the interior of the device is sufficiently clean. At the same time, the lubricating oil inside the device will not leak out, so that the device is not affected by the external environment and has sufficient working stability.

[0031] In this embodiment, if Figure 1-2 As shown, the operator places the processed product on the upper side of the product support seat 10, and can quickly find the placement direction through the limit block 15 and the anti-error pin 16. Press the start button, the double-acting cylinder 9 is activated, and the rod sleeve 3 is driven to move downward. The rod sleeve 3 slides in the bushing 13 and interacts with the chuck 4 through the slot 71. The descent of the rod sleeve 3 causes the rod 7 to move in the inclined direction, ensuring that the movement of the rod 7 drives the clamping block 11 to move toward the center at the same time. When the rod sleeve 3 continues to descend, the inner side of the clamping block 11 The pressure pin 12 begins to contact the outer circle of the workpiece, and applies a uniform clamping force to the processed product under hydraulic drive, so that the product can be processed. During processing, the air nozzle 14 can flush the processing position to avoid the residue of debris, and cool the tool at the same time. The air intake groove 103 takes in air through the air hole 102 to perform air inspection on the end face of the product. After the processing is completed, the hydraulic control system works in reverse, and the double-acting cylinder 9 pulls the pull rod sleeve 3 upward, so that the clamping block 11 releases the product, and the product can be safely taken out and put into the next processed product.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A hydraulic pull-down centering clamping device, characterized in that: include: Bottom plate (1); A body (2) is arranged at the middle of the upper side of the base plate (1); a rod sleeve (3) is vertically arranged at the center of the body (2); a plurality of chucks (4) extending outward are arranged on the outer circumference of the rod sleeve (3) in a circumferential direction; a rear cover (5) is detachably arranged at the bottom of the body (2); a limiting column (6) extending upward is arranged on the upper side of the rear cover (5) and located between adjacent chucks (4); a plurality of rods (7) are arranged on the outer side of the chucks (4) on the body (2); the rods (7) are arranged obliquely and are slidably connected to the body (2); a rod adjustment mechanism (8) abutting against the rods (7) is arranged on the side wall of the body (2); A double-acting oil cylinder (9) is arranged at the bottom of the base plate (1), and the movable end of the double-acting oil cylinder (9) is connected to the pull rod sleeve (3); A product support seat (10) fixedly arranged at the middle of the upper end surface of the body (2); A clamping block (11) is detachably arranged on the upper part of the pull rod (7); a space surrounded by a plurality of the clamping blocks (11) is located on the upper side of the product support seat (10) for placing products.

2. The hydraulic pull-down centering clamping device according to claim 1 is characterized in that: A pressing nail (12) is detachably provided on the inner side of the clamping block (11).

3. The hydraulic pull-down centering clamping device according to claim 1 is characterized in that: The bottom of the pull rod (7) is provided with a slot (71) matching the chuck (4).

4. The hydraulic pull-down centering clamping device according to claim 1 is characterized in that: The upper end and the lower end of the pull rod sleeve (3) are both slidably connected with bushings (13).

5. The hydraulic pull-down centering clamping device according to claim 1 is characterized in that: The pull rod adjustment mechanism (8) comprises an adjustment screw (82) arranged inside the body (2), a spring (81) is sleeved on the adjustment screw (82), a contact ball (83) is arranged at one end of the adjustment screw (82) close to the pull rod (7), and the spring (81) abuts against the contact ball (83).

6. The hydraulic pull-down centering clamping device according to claim 1 is characterized in that: Anti-misalignment pins (16) are vertically arranged on the front and rear sides of the product support seat (10), an air nozzle (14) is arranged on one side of the anti-misalignment pin (16), and a limit block (15) is arranged on the upper side of the body (2) near the anti-misalignment pin (16).

7. The hydraulic pull-down centering clamping device according to claim 1 is characterized in that: A truncated cone (101) is provided at the upper end of the product support seat (10), at least one air hole (102) is provided on the truncated cone (101), and an air inlet groove (103) connected to the air hole (102) is provided on the side wall of the product support seat (10).

Images