Quick cylinder for pressing machine loading

Abstract

The utility model discloses a quick cylinder for press loading, which comprises a cylinder body assembly, a piston assembly and a quick rod, the cylinder body assembly comprises a cylinder barrel, a cylinder bottom and a cylinder cover, the cylinder bottom and the cylinder cover are positioned at two ends of the cylinder barrel, and the cylinder body assembly is provided with a first oil inlet and a second oil inlet; the piston assembly is located in the cylinder barrel, one end of the piston assembly penetrates through the cylinder cover and extends out of the cylinder body assembly, and the piston assembly divides an inner cavity of the cylinder body assembly into a rod cavity and a rodless cavity which are not communicated with each other; the rod cavity is communicated with the first oil inlet; a through groove extending to the rodless cavity is formed in the center of the piston assembly; the quick rod is located in the through groove, one end of the quick rod is connected with the cylinder body assembly, the quick rod is provided with an axially-through oil passing channel and a radial through hole penetrating through the quick rod in the radial direction, and the oil passing channel is communicated with the second oil inlet through the radial through hole. The rapid rod is additionally arranged in the piston rod, so that the initial impact speed is improved under the condition that the axial size of the oil cylinder is not increased.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical manufacturing, in particular to a fast cylinder for press loading. Background Art

[0002] Traditional hydraulic cylinders for presses have low loading speed requirements and require the rodless chamber to be filled with oil before slowly pushing the piston rod. Due to the small initial space of the rodless chamber, the cylinder startup speed is slow. However, for applications with higher impact speed requirements or greater impact resistance, traditional cylinders are difficult to meet. Existing technologies often increase the impact speed through multi-stage cylinder designs, but this increases the cross-sectional size of the cylinder. Therefore, it is necessary to design a hydraulic cylinder for press loading that can both increase the loading impact speed and simplify the structure. Utility Model Content

[0003] In order to solve the technical problems of low impact speed or large cross-sectional size of the oil cylinder for the press in the prior art, the utility model provides a fast cylinder for press loading to solve the above problems.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a quick cylinder for loading a press, comprising a cylinder assembly, a piston assembly and a quick rod, the cylinder assembly comprising a cylinder barrel, a cylinder bottom and a cylinder cover located at both ends of the cylinder barrel, the cylinder assembly is provided with a first oil inlet and a second oil inlet; the piston assembly is located in the cylinder barrel, one end of the piston assembly passes through the cylinder cover and extends out of the cylinder assembly, the piston assembly divides the inner cavity of the cylinder assembly into a rod cavity and a rodless cavity which are not connected to each other; the rod cavity is connected to the first oil inlet; the center of the piston assembly has a through groove extending to the rodless cavity; the quick rod is located in the through groove, one end of the quick rod is connected to the cylinder assembly, the quick rod has an axially through oil passage and a radial through hole radially through the quick rod, the radial through hole connects the oil passage with the second oil inlet.

[0005] Furthermore, the piston assembly includes a piston, a piston rod and a piston head located at the end of the piston rod, the through groove penetrates the piston rod axially, and the piston and the piston head move synchronously with the piston rod.

[0006] Furthermore, the piston is located at the end of the piston rod, a rod cavity is formed between the piston rod and the cylinder, and the through groove penetrates the piston rod and the piston along the axial direction.

[0007] Furthermore, the piston is located on the outer periphery of the piston rod.

[0008] Furthermore, the inner diameter of the piston rod is larger than the outer diameter of the quick rod, so that the rodless cavity is communicated with the oil passage.

[0009] Furthermore, the first oil inlet is located on the cylinder cover, the second oil inlet is located on the cylinder bottom, and one end of the quick rod is connected to the cylinder bottom.

[0010] Furthermore, one end of the second oil inlet connected to the quick rod has an annular groove arranged around the quick rod, and the radial through hole is located on the surface of the quick rod facing the annular groove.

[0011] Furthermore, the length of the quick rod is greater than the stroke of the piston assembly.

[0012] The beneficial effects of the utility model are:

[0013] (1) The utility model adds a quick rod inside the piston rod, thereby increasing the initial impact speed without increasing the axial size of the cylinder.

[0014] (2) When the utility model performs loading operation, the hydraulic oil can quickly enter the oil passage in the quick rod to form initial hydraulic pressure, thereby quickly pushing the oil cylinder to start and meet the requirements of large impact force. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 It is an axial cross-sectional view of a specific embodiment of the quick cylinder for press loading described in the utility model.

[0017] In the figure, 1. cylinder assembly, 101. cylinder barrel, 102. cylinder bottom, 103. cylinder head, 2. piston assembly, 201. piston, 202. piston rod, 203. piston head, 3. quick rod, 4. first oil inlet, 5. second oil inlet, 6. rod chamber, 7. rodless chamber, 8. through groove, 9. oil passage, 10. radial through hole, 11. annular groove. DETAILED DESCRIPTION

[0018] The following describes embodiments of the present invention in detail. 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 intended only to explain the present invention and are not to be construed as limiting the present invention.

[0019] like Figure 1As shown, a quick cylinder for loading a press comprises a cylinder assembly 1, a piston assembly 2 and a quick rod 3, the cylinder assembly 1 comprises a cylinder barrel 101, a cylinder bottom 102 and a cylinder cover 103 located at both ends of the cylinder barrel 101, and a first oil inlet 4 and a second oil inlet 5 are provided on the cylinder assembly 1; the piston assembly 2 is located in the cylinder barrel 101, and one end of the piston assembly 2 extends out of the cylinder assembly 1 through the cylinder cover 103, and the piston assembly 2 divides the inner cavity of the cylinder assembly 1 into a rod cavity 6 and a rodless cavity 7 which are not connected to each other; the rod cavity 6 is connected to the first oil inlet 4; the center of the piston assembly 2 has a through groove 8 extending to the rodless cavity 7; the quick rod 3 is located in the through groove 8, and one end of the quick rod 3 is connected to the cylinder assembly 1, and the quick rod 3 has an axially through oil channel 9 and a radial through hole 10 radially through the quick rod 3, and the radial through hole 10 connects the oil channel 9 with the second oil inlet 5.

[0020] The cylinder barrel 101 is an axially through barrel-shaped structure, and the cylinder bottom 102 and the cylinder head 103 are respectively enclosed at both ends of the cylinder barrel 101. The cylinder body assembly 1 adopts a split structure to facilitate the installation of the piston assembly 2 and the quick rod 3. The through groove 8 is used to install the quick rod 3. The hydraulic oil entering from the second oil inlet 5 will not directly enter the rodless cavity 7, but first enter the oil channel 9 of the quick rod 3 through the radial through hole 10, and then reach the rodless cavity 7.

[0021] In a traditional oil cylinder, after the piston rod 202 is retracted, the space inside the rodless chamber 7 is very small. When the oil cylinder is driven, the hydraulic oil needs to overcome the adhesion between the piston rod 202 and the cylinder body before being filled into the rodless chamber 7. Therefore, the initial starting speed is slow. The present invention is provided with a quick rod 3 having an internal oil passage 9. The diameter of the oil passage 9 is small. When used for the first time, the setting of the quick rod 3 can speed up the circulation speed of the hydraulic oil, so that the hydraulic oil quickly reaches the end of the piston assembly 2 and pushes the piston assembly 2 to extend. When it is not used for the first time, after the piston assembly 2 is retracted, hydraulic oil will remain in the oil passage 9 of the quick rod 3. There is no need to overcome the adhesion between the fixed parts. This part of the hydraulic oil can provide initial power for the start of the oil cylinder. When it is started again, the hydraulic oil entering from the second oil inlet 5 can immediately merge into the oil passage 9 and quickly push the piston rod 202 out.

[0022] The piston assembly 2 generally comprises a piston 201, a piston rod 202, and a piston head 203 at the end of the piston rod 202. A through slot 8 axially extends through the piston rod 202, and both the piston 201 and the piston head 203 move synchronously with the piston rod 202. As shown in the figure, the piston head 203 is located outside the cylinder assembly 1 and is used to connect to external equipment. The outer surface of the piston 201 contacts the inner surface of the cylinder barrel 101, separating the cavities on either side of the piston 201. The outer diameter of the piston rod 202 is smaller than the inner diameter of the cylinder barrel 101, thus forming a cavity for the flow of hydraulic oil. The piston 201 can be sleeved on the outer circumferential surface of the piston rod 202, or it can be directly fixed on the end of the piston rod 202. In the specific implementation of the present invention, the piston 201 and the piston head 203 are respectively installed at both ends of the piston rod 202. At this time, a rod cavity 6 is formed between the piston rod 202 and the cylinder 101, and the piston 201, the quick rod 3 and the cylinder assembly 1 surround a rodless cavity 7, and the through groove 8 passes through the piston rod 202 and the piston 201 axially.

[0023] The first oil inlet 4 and the second oil inlet 5 can both be located on the cylinder barrel 101, or, as shown, the first oil inlet 4 can be located on the cylinder head 103 and the second oil inlet 5 on the cylinder bottom 102. The cylinder head 103 and the cylinder bottom 102 are relatively small, making drilling easier. Due to the short length of the cylinder bottom 102, the radial through hole 10 needs to be located at the end of the quick rod 3 closest to the cylinder bottom 102, preferably in a cross section directly opposite the second oil inlet 5, to reduce flow resistance.

[0024] In a preferred embodiment, one end of the second oil inlet 5 connected to the quick rod 3 has an annular groove 11 arranged around the quick rod 3, and the radial through hole 10 is located on the surface of the quick rod 3 facing the annular groove 11. The setting of the annular groove 11 can accelerate the flow of hydraulic oil and is also beneficial to the balance of the hydraulic pressure exerted on the quick rod 3 in the circumferential direction. The hydraulic oil first enters the annular groove 11 through the second oil inlet 5, and then enters the various radial through holes 10 in the circumferential direction of the quick rod 3 at the same time.

[0025] The length of the quick rod 3 cannot be too short, otherwise it cannot achieve the effect of quick starting. Preferably, the length of the quick rod 3 is greater than the stroke of the piston assembly 2 to ensure that the quick rod 3 is always located in the through groove 8.

[0026] To ensure sealing, the cylinder bottom 102 is sealed with the quick rod 3. The hydraulic oil entering from the second oil inlet 5 can only enter the oil passage 9, and will not directly enter the rodless chamber 7 from the gap between the cylinder bottom 102 and the quick rod 3. After the piston rod 202 is extended, the volume of the rodless chamber 7 increases, and the rodless chamber 7 needs to be filled with hydraulic oil. This hydraulic oil is supplied by the liquid in the oil passage 9. Therefore, the inner diameter of the piston rod 202 is larger than the outer diameter of the quick rod 3, that is, there is a gap between the two, so that the rodless chamber 7 is connected with the oil passage 9. Figure 1As shown, compared with the piston 201 and the quick rod 3, the gap between the piston rod 202 and the quick rod 3 is larger, and the inner diameter of the piston 201 is smaller, which can provide a certain support for the quick rod 3, but this support relationship will not hinder the hydraulic oil from entering the rodless chamber 7.

[0027] In the description of the present invention, it should be understood that the terms "length", "inside", "outside", "axial" and the like indicate orientations or positional relationships 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, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] Furthermore, the terms “first,” “second,” etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance.

[0029] In this specification, the schematic representations of the terms do not necessarily refer to the same embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments.

[0030] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A fast cylinder for press loading, characterized in that: include: A cylinder assembly, the cylinder assembly comprising a cylinder barrel, a cylinder bottom and a cylinder cover located at both ends of the cylinder barrel, and the cylinder assembly is provided with a first oil inlet and a second oil inlet; A piston assembly is located in the cylinder barrel, with one end of the piston assembly extending through the cylinder head and out of the cylinder assembly. The piston assembly divides the inner cavity of the cylinder assembly into a rod cavity and a rodless cavity that are not connected to each other; the rod cavity is connected to the first oil inlet; and the center of the piston assembly has a through groove extending to the rodless cavity; The quick rod is located in the through groove, one end of which is connected to the cylinder assembly. The quick rod has an axially penetrating oil passage and a radial through hole that radially penetrates the quick rod. The radial through hole connects the oil passage with the second oil inlet.

2. The fast cylinder for press loading according to claim 1, characterized in that: The piston assembly includes a piston, a piston rod and a piston head located at the end of the piston rod. The through groove penetrates the piston rod along the axial direction. The piston and the piston head both move synchronously with the piston rod.

3. The fast cylinder for press loading according to claim 2, characterized in that: The piston is located at the end of the piston rod, a rod cavity is formed between the piston rod and the cylinder, and the through groove penetrates the piston rod and the piston along the axial direction.

4. The fast cylinder for press loading according to claim 2, characterized in that: The piston is located on the outer periphery of the piston rod.

5. The fast cylinder for press loading according to claim 3, characterized in that: The inner diameter of the piston rod is greater than the outer diameter of the quick rod, so that the rodless cavity is communicated with the oil passage.

6. The fast cylinder for press loading according to claim 1, characterized in that: The first oil inlet is located on the cylinder cover, the second oil inlet is located on the cylinder bottom, and one end of the quick rod is connected to the cylinder bottom.

7. The fast cylinder for press loading according to claim 6, characterized in that: One end of the second oil inlet connected to the quick rod has an annular groove arranged around the quick rod, and the radial through hole is located on the surface of the quick rod facing the annular groove.

8. The fast cylinder for press loading according to claim 2, characterized in that: The length of the quick rod is greater than the stroke of the piston assembly.

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