Combined rotary pressing oil cylinder

Abstract

The utility model relates to a combined rotary pressing oil cylinder, which comprises an upper cylinder body, a lower cylinder body, a lower cylinder body, a lower cylinder body and a plurality of lower fixing holes, the lower cylinder body is arranged below the upper cylinder body and is provided with a plurality of lower fixing holes and lower piston holes communicated with the lower fixing holes; the rotating sleeve is arranged in the lower fixing hole and the upper fixing hole; the piston rod is provided with an upper piston ring, a lower piston ring and a rotating groove, the upper piston ring is movably inserted into the upper piston hole, and the lower piston ring is movably inserted into the lower piston hole; the steel ball is arranged on the rotating sleeve and movably inserted into the rotating groove; the pressing plate is arranged at the top of the piston rod; the lower piston ring is used for increasing the pressure when the pressing plate presses the workpiece. According to the combined rotary pressing oil cylinder, pressing force is improved through the double pistons, the height of the rotary pressing oil cylinder is increased only in the length direction, installation of other oil cylinders is not affected, the structure is compact, meanwhile, due to the fact that the double pistons are adopted, starting can be conducted under extremely low pressure, and the requirement for hydraulic oil pressure is lowered.

Description

Technical Field

[0001] The utility model relates to a rotary pressing oil cylinder, in particular to a combined rotary pressing oil cylinder. Background Art

[0002] Rotary clamping cylinders can rotate the pressure rod 90° before clamping the workpiece, facilitating workpiece clamping and are widely used. In some situations where space is tight but multiple clamping points are required, such as when three clamping points are required, a rotary three-jaw cylinder is often used, such as the rotary three-jaw cylinder disclosed in CN217233967U. However, due to its compact structure, the piston rod has a smaller surface area for clamping, resulting in a smaller clamping force. In some situations where higher clamping force is required, this rotary three-jaw cylinder cannot meet the requirements. Utility Model Content

[0003] In order to solve the above problem of low pressing force, the utility model provides a combined rotary pressing oil cylinder, and the specific technical solution is as follows:

[0004] The cam is connected with the piston rod of the piston rod and the piston rod and the piston rod respectively have the piston rod and the piston rod respectively connected, and the cam is connected with the piston rod of the piston rod; The cam is connected with the piston rod of the piston rod respectively, and the piston rod respectively connects with the piston rod of the piston rod; The cam is connected with the piston rod of the piston rod respectively, and the piston rod respectively connects with the piston rod of the piston rod;

[0005] Preferably, it also includes: a pressure regulating sleeve, which is arranged in the lower piston hole and is provided with a pressure regulating hole and a fifth oil port and a sixth oil port communicated with the pressure regulating hole, the lower piston ring is movably inserted in the pressure regulating hole, and is located between the fifth oil port and the sixth oil port, the fifth oil port is communicated with the third oil port, and the sixth oil port is communicated with the fourth oil port.

[0006] Furthermore, the lower piston ring is detachably arranged on the piston rod.

[0007] Furthermore, the outer circumferential surface of the pressure regulating sleeve is provided with a third oil groove and a fourth oil groove, the third oil groove is communicated with the fifth oil port and the third oil port respectively, and the fourth oil groove is communicated with the sixth oil port and the fourth oil port respectively.

[0008] Preferably, it further comprises: a limiting sleeve, which is arranged on the top of the rotating sleeve and is arranged opposite to the ball hole on the top of the rotating sleeve, and is used to limit the steel ball in the ball hole.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] The utility model provides a combined rotary pressing oil cylinder to improve the pressing force through double pistons, which only increases the height of the rotary pressing oil cylinder in the length direction without affecting the installation of other oil cylinders. The structure is compact, and at the same time, due to the use of double pistons, it can be started at extremely low pressure, reducing the requirement for hydraulic oil pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of this application;

[0012] Figure 2 is a top view of the present application;

[0013] Figure 3 It is along Figure 2 Cross-sectional view along line AA;

[0014] Figure 4 It is along Figure 2 Cross-sectional view along the midline BB;

[0015] Figure 5 is a cross-sectional view of the upper cylinder body;

[0016] Figure 6 It is a structural diagram of the lower cylinder;

[0017] Figure 7 is a cross-sectional view of the lower cylinder;

[0018] Figure 8 This is a schematic diagram of the assembly of the piston rod, rotating sleeve and pressure regulating sleeve;

[0019] Figure 9 yes Figure 8 sectional view of

[0020] Figure 10 It is a structural diagram of the piston rod;

[0021] Figure 11 It is a structural diagram of the rotating sleeve;

[0022] Figure 12 It is a structural diagram of the pressure regulating sleeve;

[0023] Figure 13 It is a cross-sectional view of the pressure regulating sleeve. DETAILED DESCRIPTION

[0024] The present invention will now be further described with reference to the accompanying drawings.

[0025] like Figures 1 to 13 As shown, a combined rotary pressing oil cylinder includes an upper cylinder body 1, a lower cylinder body 2, a rotating sleeve 3, a piston rod 4, a steel ball 5 and a pressure plate 6. The top of the upper cylinder body 1 is provided with an upper through hole 15, an upper piston hole 11 and an upper fixed hole 14 coaxially from top to bottom, and the diameters increase successively to form a stepped hole. The upper cylinder body 1 is also provided with a first oil port 12 and a second oil port 13, both of which are connected to the upper piston hole 11 and are respectively located at the two ends of the upper piston hole 11. The top of the lower cylinder body 2 is provided with a lower fixed hole 22 and a lower piston hole 21 that is connected to the lower fixed hole 22 and is coaxially arranged. The lower cylinder body 2 is also provided with a third oil port 23 and a fourth oil port 24 that are both connected to the lower piston hole 21 and are respectively located at the two ends of the lower piston hole 21. The top of the lower cylinder body 2 is fixed to the bottom of the upper cylinder body 1, and the lower fixed hole 22 is connected to the upper fixed hole 14 and is coaxially arranged. There are three upper piston holes 11 and three lower piston holes 21. The rotating sleeve 3 is fixed in the upper fixing hole 14 and inserted at the top of the lower fixing hole 22. Three steel balls 5 are provided and installed in the ball hole 32 at the top of the rotating sleeve 3. The piston rod 4 is provided with an upper piston ring 41, a rotating groove 43 and a lower piston ring 42 from top to bottom. The piston rod 4 is movably inserted in the upper cylinder body 1 and the lower cylinder body 2. Specifically, the top of the piston rod 4 is movably inserted in the upper through hole 15, and the end with the rotating groove 43 is movably inserted in the rotating sleeve 3, and the steel ball 5 is movably inserted in the rotating groove 43. The upper piston ring 41 is movably inserted in the upper piston hole 11, and the lower piston ring 42 is movably inserted in the lower piston hole 21. The pressure plate 6 is fixed to the top of the piston rod 4 by a nut. The first oil port 12 and the second oil port 13 are respectively located at the two ends of the upper piston ring 41, and the third oil port 23 and the fourth oil port 24 are respectively located at the two ends of the lower piston ring 42. The lower piston ring 42 is used to increase the pressure when the pressure plate 6 presses the workpiece.

[0026] The upper piston ring 41 and the lower piston ring 42 form a double piston structure. The lower piston ring 42 is used to increase the area of ​​the piston ring, thereby increasing the clamping pressure when the hydraulic oil pressure remains unchanged. The overall structure is compact and easy to install.

[0027] To facilitate setting different pressures according to different needs, a pressure-regulating sleeve 8 is also included. This sleeve is installed within the lower piston bore 21 and is provided with a pressure-regulating hole 81 and a fifth oil port 85 and a sixth oil port 86 communicating with the pressure-regulating hole 81. The lower piston ring 42 is movably inserted within the pressure-regulating hole 81 and positioned between the fifth oil port 85 and the sixth oil port 86. The fifth oil port 85 communicates with the third oil port 23, and the sixth oil port 86 communicates with the fourth oil port 24. When the area of ​​the lower piston ring 42 is adjusted, the pressure-regulating sleeve 8 is used to match the lower piston ring 42, eliminating the need to change the diameter of the lower piston bore 21 of the lower cylinder body 2, thereby improving versatility and reducing costs.

[0028] In order to facilitate the communication between the lower piston hole 21 and the pressure regulating hole 81, the outer circular surface of the pressure regulating sleeve 8 is provided with a third oil groove 83 and a fourth oil groove 84. The third oil groove 83 is respectively communicated with the fifth oil port 85 and the third oil port 23, and the fourth oil groove 84 is respectively communicated with the sixth oil port 86 and the fourth oil port 24.

[0029] In order to further facilitate the adjustment of the area of ​​the lower piston ring 42, the lower piston ring 42 is detachably arranged on the piston rod 4. The lower piston ring 42 and the piston rod 4 are made into a separate structure to facilitate the replacement of lower piston rods 4 of different diameters without changing the structure of the entire piston rod 4, thereby improving the versatility of the parts.

[0030] In order to facilitate the processing of the ball hole 32 and prevent the steel ball 5 from escaping from the ball hole 32, a limit sleeve 7 is also included. The limit sleeve 7 is arranged at the top of the rotating sleeve 3 and is arranged opposite to the ball hole 32 at the top of the rotating sleeve 3 to limit the steel ball 5 in the ball hole 32.

[0031] The outer circumference of the limiting sleeve 7 is provided with a third oil groove 83 and a fourth oil groove 84 . The third oil groove 83 is communicated with the fifth oil port 85 and the third oil port 23 respectively. The fourth oil groove 84 is communicated with the sixth oil port 86 and the fourth oil port 24 respectively.

[0032] The combined rotary clamping cylinder can arrange three clamping points as required in a small space. It can be used for inner cavity compression of products with compact space, can provide higher clamping force, and can be started at extremely low pressure.

[0033] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are intended solely to illustrate the principles of the present invention and should not be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, those skilled in the art will be able to devise other specific embodiments of the present invention without inventive effort, and such embodiments will fall within the scope of protection of the claims of the present invention.

Claims

1. A combined rotary pressing cylinder, characterized in that: include: The upper cylinder body (1) is provided with a plurality of upper piston holes (11), an upper fixing hole (14) communicating with the upper piston holes (11), and a first oil port (12) and a second oil port (13) located at both ends of the upper piston holes (11); The lower cylinder body (2) is arranged below the upper cylinder body (1) and is provided with a plurality of lower fixing holes (22), lower piston holes (21) communicating with the lower fixing holes (22), and a third oil port (23) and a fourth oil port (24) communicating with the lower piston holes (21); A rotating sleeve (3) is arranged in the lower fixing hole (22) and the upper fixing hole (14); The piston rod (4) is provided with an upper piston ring (41), a lower piston ring (42) and a rotation groove (43), wherein the upper piston ring (41) is movably inserted into the upper piston hole (11), and the lower piston ring (42) is movably inserted into the lower piston hole (21); A steel ball (5) is provided on the rotating sleeve (3) and is movably inserted into the rotating groove (43); and A pressure plate (6) is provided on the top of the piston rod (4); The first oil port (12) and the second oil port (13) are respectively located at the two ends of the upper piston ring (41), and the third oil port (23) and the fourth oil port (24) are respectively located at the two ends of the lower piston ring (42). The lower piston ring (42) is used to increase the pressure when the pressure plate (6) presses the workpiece.

2. A combined rotary pressing oil cylinder according to claim 1, characterized in that: Also includes: A pressure regulating sleeve (8) is provided in the lower piston hole (21) and is provided with a pressure regulating hole (81) and a fifth oil port (85) and a sixth oil port (86) communicating with the pressure regulating hole (81); the lower piston ring (42) is movably inserted in the pressure regulating hole (81) and is located between the fifth oil port (85) and the sixth oil port (86); the fifth oil port (85) is communicated with the third oil port (23), and the sixth oil port (86) is communicated with the fourth oil port (24).

3. A combined rotary pressing oil cylinder according to claim 2, characterized in that: The lower piston ring (42) is detachably arranged on the piston rod (4).

4. A combined rotary pressing oil cylinder according to claim 2, characterized in that: The outer circumferential surface of the pressure regulating sleeve (8) is provided with a third oil groove (83) and a fourth oil groove (84). The third oil groove (83) is communicated with the fifth oil port (85) and the third oil port (23) respectively, and the fourth oil groove (84) is communicated with the sixth oil port (86) and the fourth oil port (24) respectively.

5. The combined rotary pressing oil cylinder according to claim 1, characterized in that: Also includes: A limiting sleeve (7) is provided at the top of the rotating sleeve (3) and is arranged opposite to the ball hole (32) at the top of the rotating sleeve (3), and is used to limit the steel ball (5) in the ball hole (32).

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