Hydraulic oil cylinder capable of randomly adjusting stroke within stroke range

Abstract

The utility model belongs to the technical field of hydraulic oil cylinders, and particularly provides a hydraulic oil cylinder capable of randomly adjusting the stroke within the stroke range, which comprises a cylinder body, a cylinder bottom and a guide sleeve which are arranged at two ends of the cylinder body in a sealing way, a piston which slides along the axial direction of the cylinder body is arranged in the cylinder body, and the piston divides the interior of the cylinder body into a rodless cavity and a rod cavity; the piston rod is connected with the piston, a baffle used for pushing the adjusting mechanism is arranged at the end, penetrating through the guide sleeve, of the piston rod, the adjusting mechanism is arranged outside the cylinder body close to the guide sleeve, and a rodless cavity oil port used for conveying oil to the rodless cavity is formed in the adjusting mechanism; wherein the cylinder body is provided with an oil port communicated with a rod cavity, when oil enters the oil port, the piston rod retracts, the baffle is driven to seal an oil port of a rodless cavity of the adjusting mechanism, the motion of the piston rod is stopped, a preset stroke is achieved, and the problems that an existing stroke-adjustable oil cylinder is high in machining cost and complex in structure, is only suitable for a single-action oil cylinder, and is not suitable for a single-action oil cylinder are solved. And the use requirements of the double-acting oil cylinder cannot be met.

Description

TECHNICAL FIELD

[0001] The utility model mainly relates to the technical field of oil cylinder, specifically relates to a hydraulic cylinder that can adjust the stroke in the stroke range. BACKGROUND

[0002] The hydraulic cylinder is widely used in industries such as forging, metallurgy and engineering machinery, and the traditional oil cylinder is generally fixed stroke, that is, the designed stroke is fixed and cannot be adjusted. With the development of science and technology, the current stroke adjustable cylinder has the problems of high processing cost and complex structure, and it is only suitable for single-acting cylinder and cannot meet the use requirements of double-acting cylinder. Figure 1 As shown in the figure, the T-shaped thread needs to be machined on the surface of the piston rod, and a T-shaped threaded nut is externally matched, which has high processing cost and complex structure, and it is only suitable for single-acting cylinder and cannot meet the use requirements of double-acting cylinder. On this basis, in order to meet the diversified development of the market, a hydraulic cylinder that can adjust the stroke in the stroke range is proposed. CONTENT OF THE UTILITY MODEL

[0003] 1. The technical problem to be solved by the utility model is:

[0004] The utility model provides a hydraulic cylinder that can adjust the stroke in the stroke range, to solve the technical problem of high processing cost and complex structure of the current stroke adjustable cylinder in the background art, and the cylinder is only suitable for single-acting cylinder and cannot meet the use requirements of double-acting cylinder.

[0005] 2. Technical scheme:

[0006] In order to achieve the above-mentioned purpose, the technical scheme of the utility model is:

[0007] A hydraulic cylinder that can adjust the stroke in the stroke range, the hydraulic cylinder comprises a cylinder body, the both ends of the cylinder body are provided with a cylinder bottom and a guide sleeve which are sealingly arranged, the inside of the cylinder body is provided with a piston which slides along the axial direction, the piston divides the inside of the cylinder body into a rodless cavity and a rod cavity;

[0008] A piston rod is connected with the piston and penetrates through one end of the guide sleeve, and a baffle for pushing the adjusting mechanism is arranged at one end of the piston rod, the adjusting mechanism is arranged outside the cylinder body close to the guide sleeve, and a rodless cavity oil port for supplying oil to the rodless cavity is arranged on the adjusting mechanism;

[0009] The cylinder body is provided with an oil port which is connected with the rod cavity, when the oil port is supplied with oil, the piston rod is retracted, the baffle drives the rodless cavity oil port of the adjusting mechanism to be closed, the piston rod stops moving, and the predetermined stroke is achieved.

[0010] Further improvement is that the adjusting mechanism comprises a valve body arranged outside the cylinder body and a valve rod slidingly arranged in the valve body, and the baffle drives the valve rod to be pushed to close the rodless cavity oil port during the retraction of the piston rod.

[0011] Further improvement lies in that the valve rod is provided with a sealing ring.

[0012] The baffle is fixed on the piston rod by bolts.

[0013] Further improvement lies in that the cylinder body, the cylinder bottom and the piston form a rodless cavity.

[0014] Further improvement lies in that the cylinder body, the piston, the piston rod and the guide sleeve form a rod cavity.

[0015] 3. Beneficial effects:

[0016] Compared with the prior art, the technical scheme has the beneficial effects that:

[0017] The baffle installed on the piston rod pushes the valve rod on the adjusting mechanism, the oil return path is sealed after the valve rod moves to a certain position, the stroke is adjusted, the stroke positioning is realized by oil path on-off, the damage of parts caused by too large mechanical impact is avoided, the stroke adjustment is realized by the baffle pushing the valve rod with small force, and system control is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The utility model discloses a prior art stroke adjustable oil cylinder structure schematic diagram;

[0019] Figure 2 The utility model discloses a structure schematic diagram;

[0020] Figure 3 The utility model discloses a structure schematic diagram; Figure 2 The utility model discloses a structure schematic diagram;

[0021] Reference Signs:

[0022] 1-cylinder body;2-piston rod;3-piston;4-guide sleeve;5-valve body;6-valve rod;7-sealing ring;8-baffle;9-cylinder bottom. DETAILED DESCRIPTION

[0023] In order to facilitate understanding of the utility model, the utility model will be described more fully below with reference to the relevant drawings, and the drawings show several embodiments of the utility model, however, the utility model can be realized in many different forms, and is not limited to the embodiments described herein, on the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0024] In the utility model, unless another definite provision and limitation, the terms "mount", "connect", "connect", "fix", "have" and so on should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connect, can be mechanical connection, also can be electrical connection, can be direct connection, also can pass through intermediate medium indirectly connect, can be two element inside communication. For ordinary skilled person in the art, can understand the specific meaning of above-mentioned terms in the utility model according to specific circumstances.

[0025] It should be noted that the structures not introduced in the utility model are not related to the design points and improvement direction of the utility model, all adopt the prior art, and the contents in the above background art belong to the technical cognition range of the utility model person, because the technical content of the field is vast and too complex, therefore the above contents of the present application do not necessarily constitute the prior art.

[0026] Referring to Figures 1-3 The utility model provides a stroke range can be adjusted stroke's hydraulic oil cylinder, this hydraulic oil cylinder includes cylinder body 1, and the both ends of cylinder body 1 are equipped with cylinder bottom 9 and guide sleeve 4 with its sealed arrangement, the inside of cylinder body 1 is equipped with the piston 3 sliding along its axial direction, and the piston 3 divides the inside of cylinder body 1 into rodless cavity A and rod cavity B;

[0027] Piston rod 2 is connected with piston 3, and one end of piston rod 2 penetrating guide sleeve 4 is equipped with baffle 8 for pushing adjusting mechanism, the adjusting mechanism is arranged on the outside of cylinder body 1 close to guide sleeve 4, and the adjusting mechanism is equipped with rodless cavity oil port 1 for oil input of rodless cavity A;

[0028] Among them, the cylinder body 1 is equipped with oil port 2 connected with rod cavity B, when oil port 2 is filled with oil, piston rod 2 is retracted, baffle 8 drives rodless cavity oil port 1 of adjusting mechanism to be closed, piston rod 2 stops moving, and the predetermined stroke is realized.

[0029] Specifically, cylinder body 1, cylinder bottom 9 and piston 3 form rodless cavity A, cylinder body 1, piston 3, guide sleeve 4 and piston rod 2 form rod cavity B, valve body 5 and valve rod 6 form adjusting mechanism, and baffle 8 is fixed on piston rod 2 by bolts and is used to push valve rod 6.

[0030] Referring to Figures 2-3 When rodless cavity oil port 1 is filled with oil, pressure oil pushes valve rod 6 to move to the right end, oil flows through valve body 5, oil pipe and enters the rodless cavity A of hydraulic oil cylinder, pushes piston rod 2 to extend, and the hydraulic oil in rod cavity B flows back to the oil tank through oil port 2, as shown by the dotted line circuit in Figure 3 .

[0031] When the oil inlet 2 is filled with oil, the pressure oil enters the rod cavity B and pushes the piston rod 2 to retract, at this time, the hydraulic oil in the rodless cavity flows through the oil pipe, the valve body 5, and returns to the oil tank through the rodless cavity oil inlet 1; at this time, the baffle 8 on the piston rod 2 retracts with the piston rod 2. When the piston rod 2 retracts to the predetermined stroke, the baffle 8 pushes the valve rod 6 to the leftmost position; at this time, the hydraulic oil in the rodless cavity A flows through the oil pipe and the valve body 5 and is sealed by the sealing ring 7 on the valve rod 6, and cannot return to the oil tank through the rodless cavity oil inlet 1, so that the piston rod 2 stops moving and realizes the predetermined stroke.

[0032] The utility model discloses a position of baffle 8 on piston rod 2 can realize different strokes.

[0033] The above-mentioned embodiment only expresses certain implementation manners of the utility model, and the description is more specific and detailed, but can not be understood as the limitation of the utility model patent scope; it should be pointed out that for ordinary skilled person in the art, on the premise of not departing from the utility model concept, can make a number of deformation and improvement, and these all belong to the protection scope of the utility model; therefore, the protection scope of the utility model patent should be the attached right claim.

Claims

1. A hydraulic cylinder with an adjustable stroke range, characterized in that: The hydraulic cylinder comprises a cylinder body, cylinder bottoms and guide sleeves provided at both ends of the cylinder body in a sealed manner, a piston provided in the cylinder body and sliding along an axial direction of the cylinder body, and the cylinder body is divided into a rodless cavity and a rod cavity by the piston; a piston rod connected to the piston and provided with a baffle for pushing an adjusting mechanism at one end of the piston rod, the adjusting mechanism is provided outside the cylinder body close to the guide sleeve, and the adjusting mechanism is provided with a rodless cavity oil port for oil supply to the rodless cavity; wherein the cylinder body is provided with an oil port connected to the rod cavity, when the oil port is filled with oil, the piston rod is retracted, the baffle drives the rodless cavity oil port of the adjusting mechanism to be closed, the piston rod stops moving, and a predetermined stroke is achieved; the adjusting mechanism comprises a valve body provided outside the cylinder body and a valve rod slidingly provided in the valve body, and the baffle drives the valve rod to be pushed to close the rodless cavity oil port during the retraction of the piston rod; the valve rod is provided with a sealing ring; the baffle is fixed on the piston rod by bolts; the cylinder body, the cylinder bottoms and the piston constitute the rodless cavity; the cylinder body, the piston, the piston rod and the guide sleeve constitute the rod cavity.

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