A cantilever pressing device

Abstract

The present invention belongs to the field of machine tool fixture design, and particularly relates to a cantilever pressing device using a hydraulic system. When pressing a workpiece, different specifications of pressing plates need to be replaced for different workpieces to complete the pressing process. In the cantilever pressing device of the present invention, a hydraulic cylinder is vertically installed in the tooling. The output end of the hydraulic cylinder is a telescopic rod. The upper part of the telescopic rod is a fork ear structure, and the lower part is a shaft rod. A pin shaft is connected between the fork ear structures. An elastic expansion pin is radially installed on the shaft rod, and spherical joints that extend under elastic action are provided at both ends of the elastic expansion pin. The pressing plate passes through the fork ear structure from the lower end of the pin shaft. One end of the pressing plate is rotatably installed on the tooling, and the other end is a pressing head that can rotate within a certain angle range. This pressing device can rotate freely through the pin shaft, facilitating the pressing and fixing of workpieces of various sizes.

Description

Technical Field

[0001] The invention belongs to the field of machine tool fixture design, and in particular relates to a cantilever clamping device utilizing a hydraulic system. Background Art

[0002] At present, when a workpiece is pressed, a pressing plate is needed to press the workpiece, and different specifications of pressing plates need to be replaced for different workpieces to complete the pressing process. The operation is cumbersome, and a pressing mechanism that can press workpieces of different heights and sizes is needed to complete the work of fixing the workpiece. Summary of the invention

[0003] Purpose of the invention: The invention is mainly used for hydraulic system tooling, and the pressure plate is tightened by pressurizing, so that the workpiece is fixed.

[0004] The technical solution of the present invention is to provide a cantilever clamping device, which is vertically installed with a hydraulic cylinder in a tooling, the output end of the hydraulic cylinder is a telescopic rod, the upper part of the telescopic rod is a fork ear structure, and the lower part is a shaft rod, a pin shaft is connected between the fork ear structures, and an elastic telescopic pin is radially installed on the shaft rod, and both ends of the elastic telescopic pin have spherical joints that extend out under the action of elasticity; a pressure plate passes through the fork ear structure from the lower end of the pin shaft, and the pressure plate is rotatably installed on the tooling at one end, and the other end is a pressure head that can rotate within a certain angle range.

[0005] Advantageously, the upper end surface of the pressure plate has a mounting hole in which a cylindrical pin is placed, and the top end of the cylindrical pin has an elastic pad in contact with the pin shaft.

[0006] Advantageously, a support is also installed on the tooling, a pressure block of a right-angle structure is installed on the support, the end of the pressure plate is installed in the space between the support and the pressure block, the support has a support upper groove on the upper end surface of the space, the pressure plate and the area corresponding to the support upper groove have a pressure plate lower groove, and the pressure plate upper surface has a pressure plate groove; the supporting shaft is installed between the support upper groove and the pressure plate lower groove; a spring and a roller are installed in the groove on the pressure plate, and the roller presses the lower end surface of the pressure block under the action of the spring.

[0007] Advantageously, the hydraulic cylinder is mounted in the tooling via a bushing.

[0008] Advantageously, the spherical joints at both ends of the elastic telescopic pin are retracted under the action of pressure, so that the telescopic rod can move downward.

[0009] Advantageously, the groove on the support is a rectangular groove, and the width of the groove is close to the diameter of the supporting shaft.

[0010] Advantageously, the groove under the pressure plate is an arc-shaped groove, which matches the arc surface of the supporting shaft.

[0011] Advantageously, the size of the elastic pad is larger than the size of the cylindrical pin.

[0012] Beneficial effects of the present invention: The pressing device can rotate freely through the pin shaft, facilitating the pressing and fixing of workpieces of various sizes. Description of the Drawings

[0013] When read in conjunction with the accompanying drawings, the exemplary embodiments, preferred modes of use, other objects, and their descriptions will be best understood by reference to the following detailed description of the examples of the present invention, in which:

[0014] Figure 1 is a partial sectional front view of the cantilever pressing device;

[0015] Figure 2 is a left view of the telescopic rod part.

[0016] Wherein, 1 - pressure block, 2 - support, 3 - pressure plate, 4 - roller, 5 - support shaft, 6 - spring, 7 - telescopic rod, 8 - pin shaft, 9 - cylindrical pin, 10 - elastic telescopic pin, 11 - bushing, 12 - hydraulic cylinder, 13 - spherical joint, 14 - elastic pad Detailed Embodiments

[0017] The disclosed examples will be described more fully with reference to the accompanying drawings, in which some but not all of the disclosed examples are shown. In fact, many different examples can be described and these examples should not be construed as limited to the examples set forth herein. Rather, these examples are described so that this disclosure will be thorough and complete and will fully convey the scope of the disclosure to those skilled in the art.

[0018] Embodiment: Referring to the accompanying drawings, in the cantilever pressing device using a hydraulic system, the upper end of the telescopic rod 7 is a fork ear structure, and the lower end is matched with the hydraulic cylinder 12. The hydraulic cylinder 12 is installed on the tooling through the bushing 11. The pin shaft 8 is tightly fitted with the telescopic rod 7 at the upper end of the fork ear structure. The rod part of the cylindrical pin 9 is inserted into the through hole of the pressure plate 3. The head of the cylindrical pin 9 is provided with an elastic pad 14 and contacts the pin shaft 8; the limit pin 10 passes through the pin hole of the telescopic rod 7 at the lower end of the telescopic rod 7 with a clearance fit; the pressure plate 3 is provided with grooves at both the upper and lower ends of the root. The lower groove and the groove at the upper end of the support 2 form a section of space, and a support shaft 5 is installed therein. A spring 6 and a roller 4 are provided in the upper groove; the pressure block 1 is connected to the support 2 by bolts, and the support 2 is fixed on the surface of the tooling by bolts. The roller 4 is pressed by the spring 6 against the lower surface of the pressure block 1, and the pressure plate 3 can rotate within a small range through the support shaft 5.

[0019] During operation, the hydraulic cylinder 12 pulls the telescopic rod 7, thereby driving the pressing plate 3 to move downward through the pin shaft 8. The pressing plate 3 rotates within a small range through the support shaft 5 and another roller 4 to achieve pressing on workpieces of different heights. In the case of no pressure, the combination of the elastic expansion pin 10 and the spherical joint 13 limits the telescopic rod 7, and the spherical joint 13 protruding from the elastic expansion pin 10 rests on the hydraulic cylinder 12. For workpieces of different sizes, the height of the pressing block 1 can be adjusted and the radius of the support shaft 5 can be increased to expand the adjustment range, so as to achieve the purpose of pressing workpieces of various sizes.

[0020] The different examples of the systems, devices, and methods disclosed herein include various components, features, and functions. It should be understood that the various examples of the systems, devices, and methods disclosed herein may include any combination or any sub-combination of any one of the components, features, and functions of any one of the other examples of the systems, devices, and methods disclosed herein, and all such possibilities are intended to fall within the scope of the present invention.

[0021] The description of the different advantageous arrangements has been presented for purposes of illustration and description, but the description is not intended to be exclusive or limited to the examples in the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. Additionally, the different advantageous examples may describe different advantages compared to other advantageous examples. The selected example or examples are chosen and described in order to best illustrate the principles of the examples, the practical application, and to enable those of ordinary skill in the art to understand the disclosure having various examples that are adapted with various modifications for the particular use contemplated.

Claims

1. A cantilever pressing device, characterized in that: The device vertically installs a hydraulic cylinder (12) in the tooling. The output end of the hydraulic cylinder (12) is a telescopic rod (7). The upper part of the telescopic rod (7) is a fork ear structure, and the lower part is a shaft rod. A pin shaft (8) is connected between the fork ear structures. An elastic telescopic pin (10) is radially installed on the shaft rod. Both ends of the elastic telescopic pin (10) have spherical joints (13) that extend under the action of elasticity. The spherical joints (13) at both ends of the elastic telescopic pin (10) retract under the action of pressure, so that the telescopic rod (7) can move downward. A pressing plate (3) passes through the fork ear structure from the lower end of the pin shaft (8). The upper end surface of the pressing plate (3) has a mounting hole, and a cylindrical pin (9) is placed therein. The top end of the cylindrical pin (9) has an elastic pad (14) that contacts the pin shaft (8). One end of the pressing plate (3) is a pressing head that can rotate within a certain angle range. A support (2) is also installed on the tooling. A pressing block (1) with a right-angle structure is installed on the support (2). The other end of the pressing plate (3) is installed in the space between the support (2) and the pressing block (1). The upper end surface of the support (2) in this space has an upper groove of the support. A support shaft (5) is installed between the upper groove of the support and the lower groove of the pressing plate. The upper groove of the support is a rectangular groove. The area of the pressing plate (3) corresponding to the upper groove of the support has a lower groove of the pressing plate. The lower groove of the pressing plate is an arc groove that matches the arc surface of the support shaft (5). The width of the notch of the rectangular groove is close to the diameter of the support shaft (5). The upper end surface of the pressing plate (3) has an upper groove of the pressing plate. A spring (6) and a roller (4) are installed in the upper groove of the pressing plate. The roller (4) presses against the lower end surface of the pressing block (1) under the action of the spring (6). By adjusting the height of the pressing block (1) and increasing the adjustment range of the radius of the support shaft (5), the workpieces of various sizes can be clamped tightly.

2. The cantilever pressing device according to claim 1, characterized in that: The hydraulic cylinder (12) is installed in the tooling through a bushing (11).

3. The cantilever pressing device according to claim 1, wherein: The size of the elastic pad (14) is larger than the size of the cylindrical pin (9).

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