A hydraulic cylinder device with locking function

Abstract

The utility model relates to the field of hydraulic cylinders, and in particular to a hydraulic cylinder device with a locking function. The technical problem to be solved by the utility model is to provide a hydraulic cylinder device that can lock the piston rod to prevent the piston rod from extending and retracting under the action of an external load force, thereby ensuring the stability and safety of the hydraulic cylinder. A hydraulic cylinder device with a locking function includes a cylinder barrel, a front cover, a rear cover, a pull rod, a pressure cover, a guide sleeve, a piston rod, a piston, a sealing ring, a support ring, a fixing sleeve, a buffer ring, a locking structure, a locking sleeve, a locking groove, an installation slot hole, a locking block, a spring and an oil delivery channel. The utility model achieves the effect of locking the piston rod to prevent the piston rod from extending and retracting under the action of an external load force, thereby ensuring the stability and safety of the hydraulic cylinder.

Description

Technical Field

[0001] The utility model relates to the field of hydraulic oil cylinders, in particular to a hydraulic oil cylinder device with a locking function. Background Art

[0002] The hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). It has a simple structure and reliable operation, and can be used to achieve reciprocating motion.

[0003] The piston in the existing hydraulic cylinder can move under the action of changes in oil pressure, and the piston rod can drive the corresponding equipment to move. However, the general hydraulic cylinder does not have a locking structure inside. It is difficult to lock the equipment after adjusting the position of the equipment, which makes it difficult to ensure the stability of the equipment. Therefore, it is urgent to develop a hydraulic cylinder device that can lock the piston rod to prevent the piston rod from extending and retracting under the action of external load force, thereby ensuring the stability and safety of the hydraulic cylinder. Utility Model Content

[0004] In order to overcome the shortcomings of the existing hydraulic cylinders that have no locking structure and have poor stability and safety, the technical problem to be solved by the utility model is to provide a hydraulic cylinder device that can lock the piston rod to prevent the piston rod from extending and retracting under the action of external load force, thereby ensuring the stability and safety of the hydraulic cylinder.

[0005] The utility model is achieved by the following specific technical means:

[0006] A hydraulic cylinder device with a locking function comprises a cylinder body, a front cover and a rear cover are respectively arranged on both sides of the cylinder body, and oil holes are arranged on one side of the front cover and the rear cover; the front cover and the rear cover are fixedly connected by a pull rod; a guide sleeve is arranged on the side of the front cover away from the cylinder barrel, and the guide sleeve is fixedly installed on one side of the front cover through a pressure cover; a piston rod is arranged at the center of the cylinder barrel, and the piston rod penetrates the front cover and is slidably installed in the guide sleeve; a piston is slidably arranged in the cylinder sleeve, and the piston is fixedly connected to the piston rod through a fixing sleeve; a sealing ring is arranged on the outer diameter surface of the piston, and support rings are also arranged on both sides of the sealing ring, and the support rings are fixedly connected to the piston; buffer rings are also fixedly arranged on both sides of the piston;

[0007] The piston is provided with protruding annular locking sleeves on both sides, and a clamping groove is provided on the outer diameter surface of the locking sleeve; the front cover and the rear cover are provided with a clamping structure for clamping the locking sleeve near one end of the piston;

[0008] The clamping structure includes a locking groove arranged on the end surface of the front cover and the rear cover close to the piston; a mounting slot hole is arranged on one side of the locking groove, and a locking block is slidably arranged in the mounting slot hole; a spring is also arranged on the side of the locking block away from the locking groove, and the spring is fixedly installed in the mounting slot hole; an oil delivery channel is also arranged on one side of the mounting slot hole, one end of the oil delivery channel is connected to the oil holes arranged on the front cover and the rear cover, and the other end is connected to the lower end of the mounting slot hole.

[0009] Furthermore, the locking block is provided with a chamfered arc corner at one end corner close to the locking groove, so that the locking sleeve can squeeze the locking block to make the locking block snap into the locking sleeve snap groove.

[0010] Furthermore, an oil-filled arc angle is arranged at a corner of one end of the locking sleeve away from the piston, so that the locking sleeve can squeeze the locking block so that the locking block is inserted into the locking groove of the locking sleeve.

[0011] Furthermore, a clearance fit is adopted between the locking sleeve and the locking groove, which facilitates the fit between the locking sleeve and the locking groove and the discharge of the hydraulic oil in the locking groove.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model achieves the effect of locking the piston rod and preventing the piston rod from extending and retracting under the action of external load force, thereby ensuring the stability and safety of the hydraulic cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0015] Figure 2 It is a cross-sectional structural schematic diagram of the utility model.

[0016] Figure 3 It is a partial cross-sectional structural schematic diagram of the utility model.

[0017] Figure 4 It is a cross-sectional schematic diagram of the locking structure of the utility model.

[0018] The marks in the accompanying drawings are: 1-cylinder, 2-front cover, 3-rear cover, 4-pull rod, 5-pressure cover, 6-guide sleeve, 7-piston rod, 8-piston, 9-sealing ring, 10-support ring, 11-fixing sleeve, 12-buffer ring, 13-locking structure, 14-locking sleeve, 131-locking groove, 132-installing slot, 133-locking block, 134-spring, 135-oil delivery channel, 141-card slot. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings:

[0020] Example

[0021] A hydraulic cylinder device with a locking function, such as Figure 1-4 As shown, it includes a cylinder body, and a front cover 2 and a rear cover 3 are respectively arranged on both sides of the cylinder body, and oil holes are arranged on one side of the front cover 2 and the rear cover 3; the front cover 2 and the rear cover 3 are fixedly connected by a pull rod 4; a guide sleeve 6 is arranged on the side of the front cover 2 away from the cylinder barrel 1, and the guide sleeve 6 is fixedly installed on one side of the front cover 2 through a pressure cover 5; a piston rod 7 is arranged at the center of the cylinder barrel 1, and the piston rod 7 penetrates the front cover 2 and is slidably installed in the guide sleeve 6; a piston 8 is slidably arranged in the cylinder sleeve, and the piston 8 is fixedly connected to the piston rod 7 through a fixing sleeve 11; a sealing ring 9 is arranged on the outer diameter surface of the piston 8, and support rings 10 are also arranged on both sides of the sealing ring 9, and the support rings 10 are fixedly connected to the piston 8; buffer rings 12 are also fixedly arranged on both sides of the piston 8;

[0022] The piston 8 is provided with protruding annular locking sleeves 14 on both sides, and a clamping groove 141 is provided on the outer diameter surface of the locking sleeve 14; the front cover 2 and the rear cover 3 are provided with a clamping structure for clamping the locking sleeve 14 at one end close to the piston 8;

[0023] The clamping structure includes a locking groove 131 arranged on the end surface of the front cover 2 and the rear cover 3 near the piston 8; a mounting slot hole 132 is arranged on one side of the locking groove 131, and a locking block 133 is slidably arranged in the mounting slot hole 132; a spring 134 is also arranged on the side of the locking block 133 away from the locking groove 131, and the spring 134 is fixedly installed in the mounting slot hole 132; an oil delivery channel 135 is also arranged on one side of the mounting slot hole 132, and one end of the oil delivery channel 135 is connected to the oil holes set by the front cover 2 and the rear cover 3, and the other end is connected to the lower end of the mounting slot hole 132.

[0024] Working principle:

[0025] The hydraulic cylinder of the utility model is installed on the hydraulic equipment. When in use, oil enters the oil hole on the rear cover 3 of the hydraulic cylinder, and the high-pressure oil enters the left side of the piston 8 in the cylinder barrel 1. Under the action of the high-pressure oil, the piston 8 moves to the right, and at the same time, the oil on the right side of the piston 8 is discharged from the oil port of the front cover 2. When the piston 8 moves to the right, it drives the piston rod 7 to move to the right together, so that the piston rod 7 extends out of the hydraulic cylinder to complete the preset working task.

[0026] When the piston 8 moves to the far right, the locking sleeve 14 provided on the right side of the piston 8 is snapped into the locking groove 131 provided on the front cover 2; after the locking sleeve 14 enters the locking groove 131, the locking sleeve 14 squeezes the locking block 133, so that the locking block 133 retracts and squeezes the spring 134 into the mounting slot 132; when the locking sleeve 14 completely enters the locking groove 131, the slot 141 provided on the locking sleeve 14 is aligned with the locking block 133, and the locking block 133 extends out from the mounting slot 132 under the action of the spring 134, and is snapped into the slot 141 provided on the locking sleeve 14, so that the locking sleeve 14 is snapped and locked; thereby, the piston 8 and the piston rod 7 are locked to prevent the piston rod 7 from extending and retracting under the action of the external load force; thereby, the stability of the hydraulic rod is ensured.

[0027] When the piston rod 7 needs to retract, oil flows into the oil hole on the front cover 2 of the hydraulic cylinder, and the high-pressure oil enters the right side of the piston 8 in the cylinder barrel 1. At the same time, the high-pressure oil enters the mounting slot 132 from the oil delivery channel 135 set on the front cover 2, pushing the locking block 133 in the mounting slot 132 to move upward, so that the lower end of the locking block 133 is disengaged from the slot 141 set on the locking sleeve 14, thereby achieving the unlocking effect. After unlocking, the piston 8 moves to the other end under the push of the hydraulic oil. Similarly, when the piston 8 moves to the other end, the locking structure 13 at the other end engages and locks the locking sleeve 14 on the piston 8.

[0028] Although the present disclosure has been described in detail with reference to the exemplary embodiments, the present disclosure is not limited thereto, and it will be apparent to those skilled in the art that various modifications and changes may be made thereto without departing from the scope of the present disclosure.

Claims

1. A hydraulic cylinder device with a locking function, comprising a cylinder body, a front cover (2) and a rear cover (3) are respectively arranged on both sides of the cylinder body, and oil holes are arranged on one side of the front cover (2) and the rear cover (3); the front cover (2) and the rear cover (3) are fixedly connected by a pull rod (4); a guide sleeve (6) is arranged on the side of the front cover (2) away from the cylinder barrel (1), and the guide sleeve (6) is fixedly installed on one side of the front cover (2) through a pressure cover (5); a piston rod (7) is arranged at the center of the cylinder barrel (1), and the piston rod (7) passes through the front cover (2) and is slidably installed in the guide sleeve (6); a piston (8) is slidably arranged in the cylinder sleeve, and the piston (8) is fixedly connected to the piston rod (7) through a fixing sleeve (11); a sealing ring (9) is arranged on the outer diameter surface of the piston (8), and support rings (10) are also arranged on both sides of the sealing ring (9), and the support rings (10) are fixedly connected to the piston (8); buffer rings (12) are also fixedly arranged on both sides of the piston (8); It is characterized in that The piston (8) is provided with protruding annular locking sleeves (14) on both sides, and a clamping groove (141) is provided on the outer diameter surface of the locking sleeve (14); the front cover (2) and the rear cover (3) are provided with a clamping structure for clamping the locking sleeve (14) at one end close to the piston (8); The clamping structure comprises a locking groove (131) arranged on the end surface of the front cover (2) and the rear cover (3) on one side close to the piston (8); a mounting slot hole (132) is arranged on one side of the locking groove (131), and a locking block (133) is slidably arranged in the mounting slot hole (132); a spring (134) is also arranged on the side of the locking block (133) away from the locking groove (131), and the spring (134) is fixedly installed in the mounting slot hole (132); an oil delivery channel (135) is also arranged on one side of the mounting slot hole (132), and one end of the oil delivery channel (135) is connected to the oil holes provided in the front cover (2) and the rear cover (3), and the other end is connected to the lower end of the mounting slot hole (132).

2. A hydraulic cylinder device with locking function according to claim 1, characterized in that: The locking block (133) is provided with a chamfered arc corner at one end corner close to the locking groove (131).

3. A hydraulic cylinder device with locking function according to claim 1, characterized in that: An oil chamfered arc angle is arranged at a corner of one end of the locking sleeve (14) away from the piston (8).

4. A hydraulic cylinder device with locking function according to claim 1, characterized in that: The locking sleeve (14) and the locking groove (131) are clearance-fitted.

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