Compact double-taper-sleeve hydraulic locker

Abstract

The utility model relates to a compact type double-taper-sleeve hydraulic locker which comprises a cylinder body, a middle sleeve and two locking assemblies, the middle sleeve is located between the two locking assemblies, and the two locking assemblies are symmetrically arranged based on the middle sleeve. The locking assembly comprises a piston, a locking taper sleeve and a spring, the piston rod is sleeved with the locking taper sleeve, the piston is arranged outside the locking taper sleeve, the spring makes contact with the end face of the piston, the cylinder body is provided with an oil way, an oil cavity is formed between the piston and the cylinder body, and the oil way leads to the oil cavity; the middle sleeve is arranged between the two pistons, the two ends of the middle sleeve abut against the two pistons respectively, or the middle sleeve is arranged between the two locking taper sleeves, and the two ends of the middle sleeve abut against the two locking taper sleeves respectively. According to the utility model, the design of an oil path is simplified, enough locking force is provided, and meanwhile, the occupation of external space is reduced, so that the installation and the use of the locker can be ensured when the locker is limited by environmental space.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic oil cylinder technical field more specifically, it relates to a compact double taper sleeve hydraulic locker. BACKGROUND

[0002] Hydraulic oil cylinder in use, often need to control the extension length of piston rod, currently commonly used one way is to adopt mechanical locking mechanism namely locker to realize the position locking of oil cylinder piston rod, this method has the advantages of relative safety, reliable, economic advantage, this type of locker has begun to apply in many fields in China, more common structure is: locking taper sleeve adopts thin wall and has a taper sleeve with a slot, through the outer taper sleeve of folding spring is pushed, extrusion locking taper sleeve, make locking taper sleeve elastic deformation, the inner hole surface of locking taper sleeve is pressed to the outer surface of piston rod, thereby realizing the position locking of oil cylinder piston rod.

[0003] However, the locking position of the commonly used oil cylinder locker is the surface of the oil cylinder piston rod, and the surface is the sealing surface of the piston rod, so the clamping force of the clamp on the surface cannot be too large, otherwise the surface will be damaged, resulting in the sealing failure of the oil cylinder and the oil leakage phenomenon.

[0004] Therefore, without increasing the clamping force of the locker on the piston rod, in order to ensure sufficient locking force, the usual method is to connect two or more lockers in series, through the series connection of multiple lockers, the required locking force is realized. However, this method of connecting multiple lockers in series leads to the increase of the axial space occupied by the locker, and when the environmental space is limited, this simple series connection of multiple lockers may not be realized in practice, and another problem of this series connection method is that multiple control circuits are required for synchronous control. After connecting multiple lockers in series, the control oil way is more, and the whole device is bulky. Based on this, it is necessary to improve the existing hydraulic locker. SUMMARY

[0005] In view of the deficiencies in the prior art, the utility model aims at providing a compact double taper sleeve hydraulic locker, which simplifies the oil way design, provides sufficient locking force, reduces the occupation of external space, and ensures the installation and use of the locker when the environmental space is limited.

[0006] The above technical purpose of the utility model is realized by the following technical scheme:

[0007] A compact double taper sleeve hydraulic locker, comprising a cylinder body, an intermediate sleeve arranged in the cylinder body, and two locking assemblies, the intermediate sleeve is between the two locking assemblies, and the two locking assemblies are symmetrically arranged based on the intermediate sleeve.

[0008] The locking assembly comprises a piston, a locking cone sleeve and a spring, the locking cone sleeve is sleeved on the piston rod of the hydraulic cylinder, the piston is arranged outside the locking cone sleeve, the spring is in contact with the end face of the piston, the cylinder is provided with an oil passage, and an oil cavity is formed between the piston and the cylinder.

[0009] The intermediate sleeve is arranged between the pistons of the two locking assemblies, and the two ends of the intermediate sleeve are respectively in abutment with the two pistons, or the intermediate sleeve is arranged between the locking cone sleeves of the two locking assemblies, and the two ends of the intermediate sleeve are respectively in abutment with the two locking cone sleeves.

[0010] In one of the embodiments, the locking cone sleeve is sleeved on the piston rod, one end of the locking cone sleeve is in abutment with the inner end face of the cylinder on the same side, the intermediate sleeve is sleeved on the piston rod, the intermediate sleeve is between the two locking cone sleeves, and the two ends of the intermediate sleeve are respectively in contact with the two locking cone sleeves, the piston is arranged outside the locking cone sleeve, part of the intermediate sleeve is between the locking cone sleeve and the piston, a sealing element is arranged between the intermediate sleeve and the locking cone sleeve, the spring is arranged between the piston and the inner end face of the cylinder on the same side, the piston and the inner wall of the cylinder are provided with a sealing element, an oil cavity is formed between the two pistons, the intermediate sleeve and the cylinder, and the oil passage of the cylinder is in communication with the oil cavity.

[0011] In one of the embodiments, the intermediate sleeve is provided with a sealing element with the piston rod.

[0012] In one of the embodiments, the locking cone sleeve is sleeved on the piston rod, one end of the locking cone sleeve is in abutment with the inner end face of the cylinder on the same side, and the two locking cone sleeves are in abutment with each other, the piston is arranged outside the locking cone sleeve, the spring is arranged between the piston and the inner end face of the cylinder on the same side, the piston and the inner wall of the cylinder are provided with a sealing element, the circumferential side of the end of the piston away from the spring is provided with a step, the intermediate sleeve is sleeved outside the steps of the two pistons, a sealing element is arranged between the inner wall of the intermediate sleeve and the circumferential side of the steps of the two pistons, there is a gap between the two pistons, there is a gap between the step of the piston and the end face of the intermediate sleeve, an oil cavity is formed between the two pistons, the intermediate sleeve and the cylinder, and the oil passage of the cylinder is in communication with the oil cavity.

[0013] In one of the embodiments, the locking cone sleeve is sleeved on the piston rod, one end of the locking cone sleeve abuts against the inner end face of the same side cylinder body, the intermediate sleeve is sleeved on the piston rod, the intermediate sleeve is between the two locking cone sleeves, and the two ends of the intermediate sleeve respectively contact the two locking cone sleeves, the piston is arranged outside the locking cone sleeve, the piston and the inner wall of the cylinder body are provided with a sealing element, the installation space for accommodating the springs is formed between the two pistons, the intermediate sleeve is in the installation space, the two springs are in the installation space, and the two springs are sleeved on the intermediate sleeve and abut against each other, each spring abuts against the piston on the same side, and the oil cavity is formed between the piston and the inner end face of the cylinder body on the same side, and the oil passage of the cylinder body communicates with the oil cavities on the two sides.

[0014] In one of the embodiments, the intermediate sleeve is provided with a sealing element and the piston rod.

[0015] In one of the embodiments, the cylinder body comprises a main cylinder body, a flange and a connecting piece, the flanges are arranged at the two ends of the main cylinder body, and the connecting piece is fixedly connected to the outer side of one of the flanges, so that the cylinder body forms an integral whole.

[0016] In one of the embodiments, the locking cone sleeve is an elastic cone sleeve with an axial slot.

[0017] In summary, the utility model has the following beneficial effects:

[0018] The utility model integrates the two locking assemblies in the same cylinder body, simplifies the oil passage design, simultaneously limits the two locking assemblies through the intermediate sleeve, makes the two locking assemblies simultaneously play a role, provides sufficient locking force, reduces the occupation of external space, and thus when the environment space is limited, the installation and use of the locker can also be ensured. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the schematic view of the first structure of the utility model;

[0020] Figure 2 is the schematic view of the second structure of the utility model;

[0021] Figure 3 is the schematic view of the third structure of the utility model.

[0022] In the drawing: 1, main cylinder body, 2, flange, 3, connecting piece, 4, piston, 5, locking cone sleeve, 6, spring, 7, piston rod, 8, oil cavity, 9, oil passage, 10, intermediate sleeve. DETAILED DESCRIPTION

[0023] The utility model will be described in detail in combination with the drawings and embodiments.

[0024] It is to be noted that the terms such as "upper", "lower", and the like used herein are relative to the perspective of the drawings and are merely for the convenience of description and should not be construed as a limitation on the technical solutions.

[0025] The utility model provides a compact double-tapered sleeve hydraulic locker, including cylinder body and setting in the intermediate sleeve 10 and two locking assemblies of cylinder body, the intermediate sleeve 10 is between two locking assemblies, and two locking assemblies are based on the symmetry of intermediate sleeve 10 Setting;

[0026] The locking assembly comprises a piston 4, a locking taper sleeve 5 and a spring 6, the locking taper sleeve 5 is sleeved on the piston rod 7 of the hydraulic cylinder, the piston 4 is arranged outside the locking taper sleeve 5, the spring 6 is in contact with the end face of the piston 4, the cylinder body is provided with an oil way 9, and the oil cavity 8 is formed between the piston 4 and the cylinder body, and the oil way 9 leads to the oil cavity 8.

[0027] The intermediate sleeve 10 is arranged between the pistons 4 of the two locking assemblies, and the two ends of the intermediate sleeve 10 abut against the two pistons 4 respectively, or the intermediate sleeve 10 is arranged between the locking taper sleeves 5 of the two locking assemblies, and the two ends of the intermediate sleeve 10 abut against the two locking taper sleeves 5 respectively.

[0028] The mechanism of the movement of the locking assembly itself is the same as that of the locker in the prior art, that is, the locking taper sleeve 5 is an elastic taper sleeve with an axial slot, when the taper surface of the locking taper sleeve 5 is subjected to pressure, the inner diameter of the locking taper sleeve 5 becomes smaller, and when the taper surface of the locking taper sleeve 5 is not subjected to pressure, the inner diameter of the locking taper sleeve 5 becomes larger under the elastic action of itself. Under the action of hydraulic oil, the piston 4 overcomes the force of the spring 6 and moves along the outer surface of the locking taper sleeve 5, the locking taper sleeve 5 is separated from the piston 4, and the inner diameter of the locking taper sleeve 5 becomes larger under the elastic action of itself, that is, the piston rod 7 of the hydraulic cylinder is loosened; after losing the action of the hydraulic oil, the spring 6 pushes the piston 4 to reset, the piston 4 applies pressure to the locking taper sleeve 5, the locking taper sleeve 5 presses the piston rod 7, and the locking taper sleeve 5 plays a role in locking the piston rod 7.

[0029] In the utility model, the two locking assemblies are connected through the intermediate sleeve 10 and play a role in force transmission, so that the two locking assemblies are compactly arranged in the same cylinder body. It is easy to understand that no matter whether the intermediate sleeve 10 abuts against the two pistons 4 or the two locking taper sleeves 5, the two locking assemblies are connected through the intermediate sleeve 10 and play a role in force transmission, so that the two locking assemblies are compactly arranged in the same cylinder body.

[0030] In the utility model, the cylinder body comprises a main cylinder body 1, a flange 2 and a connecting piece 3, as shown in Figures 1-3As shown, the both ends of the main cylinder body 1 are provided with flanges 2, the connecting piece 3 is fixedly connected with the outside of one of the flanges 2, so that the cylinder body forms an integral whole. The connecting piece 3 is further connected with the cylinder barrel of the external hydraulic cylinder or other fixed mounting piece to form an integral whole and keep a fixed and unmoved state. It is easy to understand that the piston rod 7 of the hydraulic cylinder penetrates the whole cylinder body along the axis of the main cylinder body 1, and the connection between the piston rod 7 and the cylinder body keeps a sealed state. This design is a conventional setting in the field, and the utility model will not be described in detail.

[0031] Further, the utility model provides three feasible setting modes, and it is easy to understand that other feasible setting modes should be regarded as the protection scope of the utility model without departing from the principle of the utility model. The specific embodiments are as follows:

[0032] The first structure is as shown in the figure. Figure 1 The locking cone sleeve 5 is sleeved on the piston rod 7, one end of the locking cone sleeve 5 abuts against the inner end face of the cylinder body, i.e. the inner wall of the flange 2 on the same side, the intermediate sleeve 10 is sleeved on the piston rod 7, the intermediate sleeve 10 is between the two locking cone sleeves 5, and the both ends of the intermediate sleeve 10 contact the two locking cone sleeves 5 respectively, the piston 4 is arranged outside the locking cone sleeve 5, part of the intermediate sleeve 10 is between the locking cone sleeve 5 and the piston 4, a sealing piece is arranged between the intermediate sleeve 10 and the locking cone sleeve 5, the spring 6 is arranged between the piston 4 and the inner end face of the cylinder body, i.e. the inner wall of the flange 2 on the same side, the piston 4 and the inner wall of the cylinder body are provided with sealing pieces, an oil cavity 8 is formed between the two pistons 4, the intermediate sleeve 10 and the cylinder body, and the oil passage 9 of the cylinder body is communicated with the oil cavity 8. Since the oil cavity 8 is in the middle part of the cylinder body, preferably, the oil passage 9 is also in the middle part of the cylinder body and directly communicated with the oil cavity 8.

[0033] Preferably, the intermediate sleeve 10 and the piston rod 7 are provided with a sealing piece.

[0034] The working process of the first structure is as follows: when the hydraulic oil is not connected, the springs 6 on both sides will push the pistons 4 on the same side to move to the middle part of the cylinder body under the elastic action of the springs 6, so that the two locking cone sleeves 5 are locked. Since the locking cone sleeves 5 are deformed under pressure, the two locking cone sleeves 5 will press the intermediate sleeve 10. Since both sides exert force on the intermediate sleeve 10, the intermediate sleeve 10 limits the locking cone sleeves 5 on both sides, so that the locking cone sleeves 5 always press the piston rod 7. When the hydraulic oil is connected, the hydraulic oil pushes the two pistons 4 to move in the direction of the springs 6 on the same side, so that the two locking cone sleeves 5 are loosened, the two locking cone sleeves 5 no longer abut against the intermediate sleeve 10, and the double-cone-sleeve hydraulic lock releases the piston rod 7 of the hydraulic cylinder.

[0035] The second structure is as shown in the figure. Figure 2The locking cone sleeves 5 are sleeved on the piston rods 7, one end of the locking cone sleeves 5 abuts against the inner end face of the cylinder body, i.e. the inner wall of the flange 2, and the two locking cone sleeves 5 abut against each other, the pistons 4 are arranged outside the locking cone sleeves 5, the spring 6 is arranged between the piston 4 and the inner end face of the cylinder body, i.e. the inner wall of the flange 2, the piston 4 and the inner wall of the cylinder body are provided with a sealing element, the circumferential side surface of the end of the piston 4 away from the spring 6 is provided with a step, the intermediate sleeve 10 is sleeved outside the steps of the two pistons 4, and the inner wall of the intermediate sleeve 10 and the circumferential side surface of the steps of the two pistons 4 are provided with a sealing element, there is a gap between the two pistons 4, there is a gap between the step of the piston 4 and the end face of the intermediate sleeve 10, the oil cavity 8 is formed between the two pistons 4, the intermediate sleeve 10 and the cylinder body, and the oil passage 9 of the cylinder body is in communication with the oil cavity 8. Since the oil cavity 8 is in the middle part of the cylinder body, preferably, the oil passage 9 is also in the middle part of the cylinder body and directly communicates with the oil cavity 8.

[0036] The difference between the second structure and the first structure is mainly the arrangement mode of the intermediate sleeve 10. The intermediate sleeve 10 of the second structure does not contact the piston rod 7 but contacts the piston 4, but the intermediate sleeves of the two structures both have the function of limiting.

[0037] The working process of the second structure is as follows: when the hydraulic oil is not connected, the springs 6 on both sides will push the pistons 4 on the same side to move to the middle part of the cylinder body under the elastic action of the springs 6, so that the two locking cone sleeves 5 are locked, and the two pistons 4 will extrude the intermediate sleeve 10 due to the compression deformation of the locking cone sleeves 5. Therefore, the intermediate sleeve 10 limits the pistons 4 on both sides, so that the pistons 4 always press the locking cone sleeves 5; when the hydraulic oil is connected, the hydraulic oil pushes the two pistons 4 to move in the direction of the spring 6 on the same side, so that the two locking cone sleeves 5 are loosened, and the two pistons 4 no longer abut against the intermediate sleeve 10, and the double-cone-sleeve hydraulic lock releases the piston rod 7 of the hydraulic cylinder.

[0038] The third structure is as shown in FIG. 3. Figure 3The locking cone sleeve 5 is sleeved on the piston rod 7, one end of the locking cone sleeve 5 abuts against the inner end face of the cylinder body, that is, the inner wall of the flange 2, the intermediate sleeve 10 is sleeved on the piston rod 7, the intermediate sleeve 10 is located between the two locking cone sleeves 5, and the two ends of the intermediate sleeve 10 respectively contact the two locking cone sleeves 5, the piston 4 is arranged outside the locking cone sleeve 5, the piston 4 and the inner wall of the cylinder body are provided with a sealing element, the installation space for accommodating the springs 6 is formed between the two pistons 4, the intermediate sleeve 10 is located in the installation space, the two springs 6 are located in the installation space, and the two springs 6 are sleeved on the intermediate sleeve 10, the two springs 6 abut against each other, each spring 6 abuts against the piston 4 on the same side, the oil cavity 8 is formed between the piston 4 and the inner end face of the cylinder body, that is, the inner wall of the flange 2, and the oil passage 9 of the cylinder body communicates with the oil cavities 8 on both sides. Since the two oil cavities 8 are located on both sides in the cylinder body, preferably, the oil passage 9 simultaneously communicates with the two oil cavities 8 through a branch.

[0039] Preferably, the intermediate sleeve 10 is provided with a sealing element on the piston rod 7.

[0040] The difference between the third structure and the first and second structures is mainly the arrangement mode of the spring 6, but the functions of the spring 6 and the intermediate sleeve in the three structures are the same.

[0041] The working process of the third structure is as follows: when the hydraulic oil is not connected, the two intermediate springs 6 push the pistons 4 on the same side to move towards both sides of the cylinder body under the elastic force of the springs 6, so that the two locking cone sleeves 5 are locked, and the two pistons 4 press the intermediate sleeve 10 due to the compression deformation of the locking cone sleeves 5, and the intermediate sleeve 10 limits the locking cone sleeves 5 on both sides, so that the locking cone sleeves 5 always press the piston rod 7; when the hydraulic oil is connected, the hydraulic oil pushes the two pistons 4 and the intermediate springs 6 to move in the same direction, so that the two locking cone sleeves 5 are loosened, the two locking cone sleeves 5 no longer abut against the intermediate sleeve 10, and the double-cone-sleeve hydraulic lock releases the piston rod 7 of the hydraulic cylinder.

[0042] In the above-mentioned three structures, although the arrangement positions of the spring 6 and the intermediate sleeve 10 are different, the functions of the spring 6 and the intermediate sleeve 10 in the three structures are the same, and the working processes are similar. The two locking assemblies are integrated in the same cylinder body, the oil passage 9 design is simplified, the intermediate sleeve 10 simultaneously limits the two locking assemblies, the two locking assemblies can simultaneously play a role, sufficient locking force is provided, the occupation of external space is reduced, and therefore the installation and use of the lock can be ensured when the environment space is limited.

[0043] The above merely is preferred implementation manner of the present application, the protection scope of the present application is not only limited to the above examples, and belongs to the technical scheme under the idea of the present application all belongs to the protection scope of the present application. It should be pointed out that, for ordinary skilled person in the art, under the premise of not departing from the principle of the present application, some improvements and decorations, these improvements and decorations should also be considered as the protection scope of the present application.

Claims

1. A compact double cone sleeve hydraulic locker characterized by, The hydraulic cylinder comprises a cylinder body, an intermediate sleeve (10) and two locking assemblies arranged in the cylinder body, the intermediate sleeve (10) is arranged between the two locking assemblies, and the two locking assemblies are symmetrically arranged based on the intermediate sleeve (10); The locking assembly comprises a piston (4), a locking cone sleeve (5) and a spring (6), the locking cone sleeve (5) is sleeved on a piston rod (7) of the hydraulic cylinder, the piston (4) is arranged outside the locking cone sleeve (5), the spring (6) is in contact with an end surface of the piston (4), the cylinder body is provided with an oil passage (9), an oil cavity (8) is formed between the piston (4) and the cylinder body, and the oil passage (9) is communicated with the oil cavity (8). The intermediate sleeve (10) is arranged between the pistons (4) of the two locking assemblies, and the two ends of the intermediate sleeve (10) are respectively in abutment with the two pistons (4), or the intermediate sleeve (10) is arranged between the locking cone sleeves (5) of the two locking assemblies, and the two ends of the intermediate sleeve (10) are respectively in abutment with the two locking cone sleeves (5).

2. The compact dual-taper sleeve hydraulic locker of claim 1, wherein, The locking cone sleeve (5) is sleeved on the piston rod (7), one end of the locking cone sleeve (5) is in abutment with an inner end surface of the cylinder body on the same side, the intermediate sleeve (10) is sleeved on the piston rod (7), the intermediate sleeve (10) is arranged between the two locking cone sleeves (5), and the two ends of the intermediate sleeve (10) are respectively in contact with the two locking cone sleeves (5), the piston (4) is arranged outside the locking cone sleeve (5), part of the intermediate sleeve (10) is arranged between the locking cone sleeve (5) and the piston (4), a sealing element is arranged between the intermediate sleeve (10) and the locking cone sleeve (5), the spring (6) is arranged between the piston (4) and the inner end surface of the cylinder body on the same side, a sealing element is arranged between the piston (4) and the inner wall of the cylinder body, and an oil cavity (8) is formed between the two pistons (4), the intermediate sleeve (10) and the cylinder body.

3. The compact dual-taper sleeve hydraulic locker of claim 2, wherein, A sealing element is arranged between the intermediate sleeve (10) and the piston rod (7).

4. The compact dual-taper sleeve hydraulic locker of claim 1, wherein, The locking cone sleeve (5) is sleeved on the piston rod (7), one end of the locking cone sleeve (5) is in abutment with an inner end surface of the cylinder body on the same side, and the two locking cone sleeves (5) are in abutment with each other, the piston (4) is arranged outside the locking cone sleeve (5), the spring (6) is arranged between the piston (4) and the inner end surface of the cylinder body on the same side, a sealing element is arranged between the piston (4) and the inner wall of the cylinder body, a step is arranged on a circumferential side surface of the end of the piston (4) away from the spring (6), the intermediate sleeve (10) is sleeved outside the steps of the two pistons (4), a sealing element is arranged between the inner wall of the intermediate sleeve (10) and the circumferential side surface of the steps of the two pistons (4), a gap exists between the two pistons (4), a gap exists between the step of the piston (4) and the end surface of the intermediate sleeve (10), an oil cavity (8) is formed between the two pistons (4), the intermediate sleeve (10) and the cylinder body, and an oil passage (9) of the cylinder body is communicated with the oil cavity (8). A sealing element is arranged between the intermediate sleeve (10) and the piston rod (7).

5. The compact dual-taper sleeve hydraulic locker of claim 1, wherein, The locking conical sleeve (5) is sleeved on the piston rod (7), one end of the locking conical sleeve (5) abuts against the inner end face of the cylinder on the same side, the intermediate sleeve (10) is sleeved on the piston rod (7), the intermediate sleeve (10) is between the two locking conical sleeves (5), and the intermediate sleeve is in contact with the two locking conical sleeves (5) at both ends, the piston (4) is arranged outside the locking conical sleeve (5), the piston (4) and the inner wall of the cylinder are provided with a sealing element, the installation space for accommodating the spring (6) is formed between the two pistons (4), the intermediate sleeve (10) is in the installation space, the two springs (6) are in the installation space, and the two springs (6) are sleeved on the intermediate sleeve (10), the two springs (6) abut against each other, each spring (6) abuts against the piston (4) on the same side, the oil cavity (8) is formed between the piston (4) and the inner end face of the cylinder on the same side, and the oil channel (9) of the cylinder is communicated with the oil cavities (8) on both sides.

6. The compact dual-taper sleeve hydraulic locker of claim 5, wherein, The intermediate sleeve (10) and the piston rod (7) are provided with a sealing element.

7. The compact dual-taper sleeve hydraulic lock according to any one of claims 1-6, wherein, The cylinder comprises a main cylinder body (1), a flange (2) and a connecting piece (3), the flanges (2) are arranged at both ends of the main cylinder body (1), and the connecting piece (3) is fixedly connected to the outer side of one of the flanges (2), so that the cylinder forms an integral whole.

8. The compact hydraulic lock-up clutch of any one of claims 1-6, wherein, The locking conical sleeve (5) is an elastic conical sleeve with an axial slot.

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