Hydraulic lock capable of measuring hydraulic pressure after locking

Abstract

The utility model belongs to the technical field of hydraulic locks, and discloses a hydraulic lock capable of measuring hydraulic pressure after locking, which comprises a valve body and a valve component, a sliding cavity is arranged inside the valve body, a left mounting hole is arranged at one end of the valve body in the length direction, the left mounting hole is communicated with the sliding cavity, and the valve body is provided with a left oil inlet, a left oil outlet and a left detection port. The valve assembly comprises a left valve seat and a sliding valve, the sliding valve is arranged in the sliding cavity in a sliding mode and peripherally sealed on the cavity wall of the sliding cavity, one end of the left valve seat is peripherally sealed on the cavity wall of the sliding cavity, and the other end of the left valve seat blocks the left mounting hole. One end of the sliding valve extends into and blocks a left through hole formed in one end of the left valve seat, the middle area of the left valve seat is matched with the hole wall of the left mounting hole to form a left lock rear cavity, the left through hole can be communicated with the left lock rear cavity, and the left lock rear cavity is communicated with the left detection opening; a left detection opening is formed in the hydraulic lock, procedures are reduced, and the hydraulic pressure after locking is monitored in real time.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic lock technical field especially relates to a kind of hydraulic lock of lockable post-hydraulic pressure. BACKGROUND

[0002] In hydraulic system, when hydraulic cylinder is used as actuator, it is often necessary to make hydraulic cylinder stay at any position and bear certain load force, and hydraulic lock is often used to lock hydraulic cylinder in work. With the development of vehicle intelligence, the installation of sensors gradually increases, such as the installation of pressure sensor on hydraulic cylinder to detect the change of hydraulic pressure in hydraulic cylinder. The existing method for installing pressure sensor is usually to transform hydraulic cylinder.

[0003] However, hydraulic cylinder transformation involves complex processes such as hole opening and welding, which is not convenient for installing pressure sensor, and the profile size of the transformed hydraulic cylinder generally increases, which cannot be used in specific products with limited space, and the practicality is low. INVENTION CONTENTS

[0004] The utility model aims at providing a kind of hydraulic lock of lockable post-hydraulic pressure, which is convenient for installing pressure sensor and real-time monitoring lock post-hydraulic pressure.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A kind of hydraulic lock of lockable post-hydraulic pressure, comprising:

[0007] Valve body, the inside of the valve body is provided with sliding cavity, one end of the length direction of the valve body is provided with left mounting hole, the left mounting hole is communicated with the sliding cavity, the valve body is provided with left oil inlet, left oil outlet and left detection port, the left oil inlet is communicated with the sliding cavity, and the left detection port is communicated with the left oil outlet, and the left detection port installs pressure sensor part;

[0008] Valve assembly, the valve assembly includes left valve seat and slide valve, the slide valve is slidably arranged in the sliding cavity, and is circumferentially sealed to the cavity wall of the sliding cavity, one end of the left valve seat is circumferentially sealed to the cavity wall of the sliding cavity, the other end of the left valve seat blocks the left mounting hole, one end of the slide valve extends into and blocks left through hole provided at one end of the left valve seat, the middle region of the left valve seat cooperates with the hole wall of the left mounting hole to form left lock cavity, the left through hole can communicate with the left lock cavity, and the left lock cavity is communicated with the left detection port.

[0009] As preferred, the left valve seat is provided with a left guide hole, the left guide hole is communicated with the left rear locking cavity, the inside of the left through hole is provided with a first piston and a first elastic member, one end of the first elastic member is connected to the bottom of the left through hole, the other end of the first elastic member is connected to the first piston, the first piston is circumferentially sealed to the hole wall of the left through hole, and the first elastic member is in a natural state, and the first piston blocks the left guide hole.

[0010] As preferred, the valve assembly further comprises a second annular ring, the second annular ring is sleeved on the outside of the left valve seat, and is clamped between the left mounting hole and the left valve seat.

[0011] As preferred, the inside of the valve body is further provided with a left pressure measuring hole, the left pressure measuring hole is communicated with the left detection port and the left rear locking cavity.

[0012] As preferred, the other end of the valve body in the length direction is provided with a right mounting hole, the right mounting hole is communicated with the sliding cavity, the valve body is further provided with a right oil inlet, a right oil outlet and a right detection port, the right oil inlet is communicated with the sliding cavity, and the right detection port is communicated with the right oil outlet.

[0013] The valve assembly further comprises a right valve seat, one end of the right valve seat is circumferentially sealed to the cavity wall of the sliding cavity, the other end of the right valve seat blocks the right mounting hole, the other end of the spool extends into and blocks a right through hole provided at one end of the right valve seat, the middle region of the right valve seat cooperates with the hole wall of the right mounting hole to form a right rear locking cavity, the right through hole can be communicated with the right rear locking cavity, the right rear locking cavity is communicated with the right detection port, and the right detection port is provided with a pressure sensing member.

[0014] As preferred, the right valve seat is provided with a right guide hole, the right guide hole is communicated with the right rear locking cavity, the inside of the right through hole is provided with a second piston and a second elastic member, one end of the second elastic member is connected to the bottom of the right through hole, the other end of the second elastic member is connected to the second piston, the second piston is circumferentially sealed to the hole wall of the right through hole, and the second elastic member is in a natural state, and the second piston blocks the right guide hole.

[0015] As preferred, the valve assembly further comprises a third annular ring, the third annular ring is sleeved on the outside of the right valve seat, and is clamped between the right mounting hole and the right valve seat.

[0016] As preferred, the inside of the valve body is further provided with a right pressure measuring hole, the right pressure measuring hole is communicated with the right detection port and the right rear locking cavity.

[0017] As preferred, the slide valve comprises a piston column, a left jack and a right jack, the piston column is slidingly arranged in the sliding cavity and circumferentially sealed to the cavity wall of the sliding cavity, the left jack is connected to one end of the piston column and extends into and circumferentially seals the left through hole, and the right jack is connected to the other end of the piston column and extends into and circumferentially seals the right through hole.

[0018] As preferred, the middle region of the piston column is provided with an annular groove, a first annular ring is sleeved in the annular groove, and the first annular ring is circumferentially sealed to the cavity wall of the sliding cavity.

[0019] The utility model discloses beneficial effect:

[0020] The utility model provides a kind of hydraulic lock of lockable hydraulic pressure, including valve body and valve assembly, the inside of valve body is equipped with sliding cavity, and the length direction of valve body one end is provided with left mounting hole, and left mounting hole is communicated sliding cavity, and valve body is equipped with left oil inlet, left oil outlet and left detection port, and left oil inlet is communicated sliding cavity, and left detection port is communicated left oil outlet, and left detection port installs pressure sensing piece, and valve assembly includes left valve seat and slide valve, and slide valve is slidingly arranged in sliding cavity, and circumferentially sealed to the cavity wall of sliding cavity, and one end of left valve seat is circumferentially sealed to the cavity wall of sliding cavity, and the other end of left valve seat blocks left mounting hole, and one end of slide valve extends into and blocks left through hole being equipped in the one end of left valve seat, and the middle region of left valve seat cooperates with the hole wall of left mounting hole and forms left rear cavity, and left through hole can be communicated left rear cavity, and left rear cavity is communicated left detection port;By being provided with left detection port on hydraulic lock, instead of being provided with left detection port on hydraulic cylinder, reduce process, do not change the size of hydraulic cylinder, and by left hydraulic cylinder injects hydraulic oil into left oil inlet, and hydraulic oil enters left through hole, enters left rear cavity and enters left detection port by left pressure measuring hole, so that pressure sensing piece can directly detect the locking pressure of left hydraulic cylinder, facilitate the installation of pressure sensing piece, realize real-time monitoring of lockable hydraulic pressure. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the structure schematic diagram of the hydraulic lock of lockable hydraulic pressure provided by the utility model embodiment;

[0022] Figure 2 It is the section of the hydraulic lock of lockable hydraulic pressure provided by the utility model embodiment Figure 1 ;

[0023] Figure 3 It is the section of the hydraulic lock of lockable hydraulic pressure provided by the utility model embodiment Figure 2 ;

[0024] Figure 4 It is the section of the valve body provided by the utility model embodiment;

[0025] Figure 5 is a structural schematic view of a valve assembly provided by the embodiment of the present application.

[0026] In the drawings:

[0027] 1, valve body; 10, fixed hole; 11, sliding cavity; 12, left mounting hole; 13, right mounting hole; 14, left oil inlet; 15, left oil outlet; 16, left detection port; 17, left pressure measuring hole; 18, right oil inlet; 19, right oil outlet; 1a, right detection port; 1b, right pressure measuring hole;

[0028] 2, valve assembly; 21, left valve seat; 211, left guide hole; 201, left locking rear cavity; 22, slide valve; 221, piston column; 222, left jack; 223, right jack; 224, first annular ring; 231, third annular ring; 232, second annular ring; 24, right valve seat; 241, right guide hole; 202, right locking rear cavity. DETAILED DESCRIPTION

[0029] The present application will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, and not to limit the present application. In addition, it should be noted that, in order to facilitate the description, only the parts related to the present application are shown in the drawings, not all the structures.

[0030] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or it can include the contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the vertical and oblique above of the first feature to the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include the vertical and oblique below of the first feature to the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0032] In the description of the present embodiment, the terms "upper", "lower", "right", "left", and the like, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used to distinguish in the description, and have no special meaning.

[0033] The present embodiment provides a hydraulic lock capable of measuring the hydraulic pressure after locking, which reduces the process by providing a left detection port on the hydraulic lock instead of on the hydraulic cylinder, does not change the size of the hydraulic cylinder, and facilitates the installation of a pressure sensing member to realize real-time monitoring of the hydraulic pressure after locking.

[0034] Specifically, please refer to Figures 1-5 A hydraulic lock capable of measuring the hydraulic pressure after locking includes a valve body 1 and a valve assembly 2, the valve assembly 2 is installed on the valve body 1, and is used to realize locking.

[0035] The valve body 1 is evenly provided with four fixing holes 10 for installation.

[0036] Please refer to Figures 1-3 The inside of the valve body 1 is provided with a sliding cavity 11, one end of the valve body 1 in the length direction is provided with a left mounting hole 12, the left mounting hole 12 is communicated with the sliding cavity 11, the valve body 1 is provided with a left oil inlet 14, a left oil outlet 15 and a left detection port 16, wherein the left oil inlet 14 is communicated with the sliding cavity 11, the left detection port 16 is communicated with the left oil outlet 15, and a pressure sensing member is installed on the left oil outlet 15.

[0037] Optionally, the pressure sensing member is a pressure sensor.

[0038] Preferably, the left oil inlet 14 is arranged at the bottom of the valve body 1, the left oil outlet 15 is arranged at the side of the valve body 1, and the left detection port 16 is arranged at the top of the valve body 1.

[0039] Further, please refer to Figure 4 and Figure 5 The valve assembly 2 includes a left valve seat 21 and a slide valve 22. The slide valve 22 is slidably arranged in the sliding cavity 11, and the slide valve 22 is circumferentially sealed to the cavity wall of the sliding cavity 11. One end of the left valve seat 21 extends into the left mounting hole 12 and is circumferentially sealed to the cavity wall of the sliding cavity 11. The other end of the left valve seat 21 blocks the left mounting hole 12. Further, one end of the left valve seat 21 is provided with a left through hole, one end of the slide valve 22 extends into and blocks the left through hole, and the middle region of the left valve seat 21 is circumferentially spaced from the hole wall of the left mounting hole 12, thereby cooperating with the hole wall of the left mounting hole 12 to form a left post-locking cavity 201. The left through hole can communicate with the left post-locking cavity 201, and the left post-locking cavity 201 is communicated with the left detection port 16.

[0040] Preferably, one end of the valve body 1 is provided with a left threaded hole coaxially arranged with the left mounting hole 12, and the other end of the left valve seat 21 is screwed into the left threaded hole.

[0041] Further preferably, the valve assembly 2 further comprises a second annular ring 232 arranged in the left mounting hole 12 and sleeved on the outer side of the left valve seat 21, the second annular ring 232 being clamped between the left mounting hole 12 and the left valve seat 21 to achieve sealing between the left valve seat 21 and the valve body 1 and prevent hydraulic oil from leaking out.

[0042] Further, the valve body 1 is further provided with a left pressure measuring hole 17 communicating the left detection port 16 and the left rear locking cavity 201, and the left pressure measuring hole 17 is arranged to achieve communication between the left detection port 16 and the left rear locking cavity 201 and further achieve communication between the left detection port 16 and the left oil outlet 15.

[0043] In the embodiment, the spool valve 22 comprises a piston column 221 and a left jack 222, the piston column 221 is slidingly arranged in the sliding cavity 11 and circumferentially sealed to the cavity wall of the sliding cavity 11, one end of the left jack 222 is connected to one end of the piston column 221, and the other end of the left jack 222 extends into and circumferentially blocks the left through hole.

[0044] Optionally, the middle region of the piston column 221 is provided with an annular groove, and a first annular ring 224 is sleeved in the annular groove, and the first annular ring 224 is circumferentially sealed to the cavity wall of the sliding cavity 11, thereby achieving isolation of the left mounting hole 12 and the right mounting hole 13.

[0045] Further, the left valve seat 21 is provided with a left guide hole 211 communicating the left rear locking cavity 201, the inside of the left through hole is provided with a first piston and a first elastic member, one end of the first elastic member is connected to the hole bottom of the left through hole, the other end of the first elastic member is connected to the first piston, and the first piston is circumferentially sealed to the hole wall of the left through hole. In the natural state, the first elastic member blocks the left guide hole 211, and in the compressed state, the first elastic member unblocks the left guide hole 211.

[0046] Preferably, the left valve seat 21 is circumferentially spaced apart a plurality of left guide holes 211, and in the natural state, the first elastic member simultaneously blocks the plurality of left guide holes 211, and in the compressed state, the first elastic member simultaneously unblocks the plurality of left guide holes 211.

[0047] Further, the first elastic member is selected as a spring.

[0048] Through the above setting, the embodiment injects hydraulic oil into the left oil inlet 14 through the left hydraulic cylinder, the left plunger rod 222 is driven by the piston column 221 to move right, the left plunger rod 222 extends out of the left through hole, the plugging of the left through hole is released, the hydraulic oil enters the left through hole, the first elastic member is compressed by the first piston moving left, the plugging of the left guide hole 211 is released, the hydraulic oil enters the left lock rear cavity 201 and enters the left detection port 16 through the left pressure measuring hole 17, so that the pressure sensing member can directly detect the locking pressure of the left hydraulic cylinder.

[0049] To improve the practicality of the hydraulic lock with measurable locking rear hydraulic pressure provided by the embodiment, the hydraulic lock with measurable locking rear hydraulic pressure has a bidirectional locking function, specifically:

[0050] The other end of the valve body 1 in the length direction is provided with a right mounting hole 13, the right mounting hole 13 is communicated with the sliding cavity 11, the valve body 1 is provided with a right oil inlet 18, a right oil outlet 19 and a right detection port 1a, wherein the right oil inlet 18 is communicated with the sliding cavity 11, the right detection port 1a is communicated with the right oil outlet 19, and the pressure sensing member is installed in the right oil outlet 19.

[0051] Preferably, the right oil inlet 18 is arranged at the bottom of the valve body 1 and is spaced from the left oil inlet 14, the right oil outlet 19 is arranged at the side of the valve body 1 and is spaced from the left oil outlet 15, and the right detection port 1a is arranged at the top of the valve body 1 and is spaced from the left detection port 16.

[0052] Further, the valve assembly 2 further comprises a right valve seat 24. One end of the right valve seat 24 extends into the right mounting hole 13 and is circumferentially sealed to the cavity wall of the sliding cavity 11, the other end of the right valve seat 24 plugs the right mounting hole 13, and further, one end of the right valve seat 24 is provided with a right through hole, one end of the sliding valve 22 extends into and plugs the right through hole, the middle region of the right valve seat 24 is circumferentially spaced from the hole wall of the right mounting hole 13, thereby cooperating with the hole wall of the right mounting hole 13 to form a right lock rear cavity 202, the right through hole can communicate the right lock rear cavity 202, and the right lock rear cavity 202 is communicated with the right detection port 1a.

[0053] Preferably, one end of the valve body 1 in the length direction is provided with a right threaded hole, the right threaded hole is coaxially arranged with the right mounting hole 13, and the other end of the right valve seat 24 is screwed into the right threaded hole.

[0054] Further preferably, the valve assembly 2 further comprises a third annular ring 231, the third annular ring 231 is arranged in the right mounting hole 13 and is sleeved on the outside of the right valve seat 24, the third annular ring 231 is clamped between the right mounting hole 13 and the right valve seat 24, thereby sealing the right valve seat 24 and the valve body 1, preventing the hydraulic oil from leaking out.

[0055] Further, the valve body 1 is internally provided with a right pressure measuring hole 1b, the right pressure measuring hole 1b is in communication with the right detection port 1a and the right rear locking cavity 202, the right pressure measuring hole 1b is arranged to realize the communication between the right detection port 1a and the right rear locking cavity 202, and further realize the communication between the right detection port 1a and the right oil outlet 19.

[0056] The slide valve 22 in the embodiment further comprises a right jack 223, one end of the right jack 223 is connected to one end of the piston column 221, and the other end of the right jack 223 extends into and circumferentially blocks the right through hole.

[0057] Further, the right valve seat 24 is provided with a right guide hole 241, the right guide hole 241 is in communication with the right rear locking cavity 202, the inside of the right through hole is provided with a second piston and a second elastic member, one end of the second elastic member is connected to the hole bottom of the right through hole, the other end of the second elastic member is connected to the first piston, and the second piston circumferentially seals the hole wall of the right through hole. In a natural state, the second elastic member, the second piston blocks the right guide hole 241, and in a compressed state, the second elastic member, the second piston is separated from the right guide hole 241.

[0058] Preferably, the right valve seat 24 is circumferentially spaced apart and provided with a plurality of right guide holes 241, in a natural state, the second elastic member, the second piston simultaneously blocks a plurality of right guide holes 241, and in a compressed state, the second elastic member, the second piston simultaneously separates from a plurality of right guide holes 241.

[0059] Further, the second elastic member is selected from a spring.

[0060] Through the above arrangement, in the embodiment, the right hydraulic cylinder injects hydraulic oil into the right oil inlet 18, the piston column 221 drives the right jack 223 to move right, the right jack 223 extends out of the right through hole, the right through hole is unblocked, the hydraulic oil enters the right through hole, the second piston is driven to move right and compresses the second elastic member, the right guide hole 241 is unblocked, the hydraulic oil enters the right rear locking cavity 202 and enters the right detection port 1a through the right pressure measuring hole 1b, so that the pressure sensing member can directly detect the locking pressure of the right hydraulic cylinder.

[0061] The hydraulic lock capable of measuring the hydraulic pressure after locking provided in the embodiment can realize bidirectional locking, in addition, by arranging the detection port on the hydraulic lock instead of the detection port on the hydraulic cylinder, the modification process is reduced, the size of the hydraulic cylinder is not changed, by installing the pressure sensing member on the detection port, the locking pressure of the hydraulic cylinder can be directly detected.

[0062] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the present application. Here, it is not necessary and also impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application claim.

Claims

1. A hydraulic lock with a measurable hydraulic pressure behind the lock, characterized in that The utility model relates to a valve body (1) and valve assembly (2) of a valve, and the valve body (1) is provided with a sliding cavity (11), a left mounting hole (12) and a left oil inlet (14), a left oil outlet (15) and a left detection port (16), the left mounting hole (12) is communicated with the sliding cavity (11), the left oil inlet (14) is communicated with the sliding cavity (11), and the left detection port (16) is communicated with the left oil outlet (15), and the left detection port (16) is provided with a pressure sensing element. The valve assembly (2) comprises a left valve seat (21) and a sliding valve (22), the sliding valve (22) is slidably arranged in the sliding cavity (11) and is circumferentially sealed to the cavity wall of the sliding cavity (11), one end of the left valve seat (21) is circumferentially sealed to the cavity wall of the sliding cavity (11), the other end of the left valve seat (21) blocks the left mounting hole (12), one end of the sliding valve (22) extends into and blocks a left through hole arranged at one end of the left valve seat (21), the middle region of the left valve seat (21) cooperates with the hole wall of the left mounting hole (12) to form a left rear locking cavity (201), the left through hole can be communicated with the left rear locking cavity (201), and the left rear locking cavity (201) is communicated with the left detection port (16). The left valve seat (21) is provided with a left guide hole (211) communicated with the left rear locking cavity (201), the left through hole is provided with a first piston and a first elastic element, one end of the first elastic element is connected to the hole bottom of the left through hole, the other end of the first elastic element is connected to the first piston, the first piston is circumferentially sealed to the hole wall of the left through hole, and the first elastic element blocks the left guide hole (211) in a natural state.

2. The hydraulic lock of claim 1, wherein, The valve assembly (2) further comprises a second annular ring (232) sleeved on the outer side of the left valve seat (21) and clamped between the left mounting hole (12) and the left valve seat (21).

3. The hydraulic lock of claim 1, wherein, The valve body (1) is further provided with a left pressure measuring hole (17) communicated with the left detection port (16) and the left rear locking cavity (201).

4. The hydraulic lock of claim 1, wherein, The other end of the valve body (1) in the length direction is provided with a right mounting hole (13) communicated with the sliding cavity (11), the valve body (1) is further provided with a right oil inlet (18), a right oil outlet (19) and a right detection port (1a), the right oil inlet (18) is communicated with the sliding cavity (11), and the right detection port (1a) is communicated with the right oil outlet (19).

5. The hydraulic lock of any one of claims 1 to 4, wherein the hydraulic lock is configured to be able to measure the hydraulic pressure of the hydraulic lock after the lock is closed. ​ The valve assembly (2) further comprises a right valve seat (24), one end of the right valve seat (24) is circumferentially sealed to the cavity wall of the sliding cavity (11), the other end of the right valve seat (24) blocks the right mounting hole (13), the other end of the spool valve (22) extends into and blocks the right through hole provided at one end of the right valve seat (24), the middle region of the right valve seat (24) cooperates with the hole wall of the right mounting hole (13) to form a right lock rear cavity (202), the right through hole can communicate with the right lock rear cavity (202), the right lock rear cavity (202) communicates with the right detection port (1a), and the right detection port (1a) is provided with a pressure sensing member.

6. A hydraulic lock of claim 5, wherein, The right valve seat (24) is provided with a right guide hole (241) which communicates with the right lock rear cavity (202), the inside of the right through hole is provided with a second piston and a second elastic member, one end of the second elastic member is connected to the hole bottom of the right through hole, the other end of the second elastic member is connected to the second piston, the second piston circumferentially seals the hole wall of the right through hole, and the second elastic member is in a natural state, and the second piston blocks the right guide hole (241).

7. The hydraulic lock of claim 5, wherein the hydraulic lock is configured to measure the hydraulic pressure of the hydraulic lock. The valve assembly (2) further comprises a third annular ring (231), the third annular ring (231) is sleeved on the outside of the right valve seat (24) and clamped between the right mounting hole (13) and the right valve seat (24).

8. The hydraulic lock of claim 5, wherein, The inside of the valve body (1) is further provided with a right pressure measuring hole (1b), the right pressure measuring hole (1b) communicates the right detection port (1a) with the right lock rear cavity (202).

9. The hydraulic lock of claim 5, wherein, The spool valve (22) comprises a piston column (221), a left jack (222) and a right jack (223), the piston column (221) is slidably arranged in the sliding cavity (11) and circumferentially sealed to the cavity wall of the sliding cavity (11), the left jack (222) is connected to one end of the piston column (221) and extends into and circumferentially blocks the left through hole, and the right jack (223) is connected to the other end of the piston column (221) and extends into and circumferentially blocks the right through hole.

10. The hydraulic lock of claim 9, wherein, The middle region of the piston column (221) is provided with an annular groove, the first annular ring (224) is sleeved in the annular groove, and the first annular ring (224) is circumferentially sealed to the cavity wall of the sliding cavity (11).

Images