A mechanical hydraulic lock

Abstract

This utility model discloses a mechanical hydraulic lock, including a lock body and a latch movably disposed on the lock body; the lock body is provided with a first locking groove, and the latch is provided with a second locking groove that cooperates with the first locking groove for locking; the lock body is provided with a limiting member that restricts or releases the movement of the latch; the limiting member is rotatably disposed on the lock body, and the lock body is provided with a hydraulic push rod that drives the limiting member to rotate to restrict or release the movement of the latch; this utility model controls the locking and releasing of the latch by driving the limiting member to rotate with the hydraulic push rod, realizing mechanical hydraulic linkage and labor-saving operation; its core beneficial effect lies in the innovative integration of a sensing unit, which can monitor and provide feedback on the precise position status of the limiting member (i.e., the lock) in real time, thereby effectively solving the problem of the unknown status of traditional mechanical locking mechanisms, and greatly avoiding the safety risk of accidental rollover of the cab due to the lock not being fully locked or accidental failure.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic lock technology, and in particular to a mechanical hydraulic lock. Background Technology

[0002] Modern heavy-duty truck cabs typically have a suspension and vibration damping function, and their structure requires a hydraulic cab tilting mechanism. These functions need to be secured with corresponding locks to keep the cab locked during driving. During maintenance, simply unlocking the locks allows the cab to tilt freely, facilitating routine inspections and maintenance of the heavy-duty truck.

[0003] The locking mechanisms used in existing Sinotruk trucks typically employ a single mechanical latch or fasteners to restrict and position the rotating parts of the cab. However, this locking method often makes it difficult to detect the locking or unlocking status of the mechanical lock, making it difficult to detect in time when the mechanical lock is unlocked or in a mechanically malfunctioning state, leading to accidents. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing a mechanical-hydraulic lock that can reliably detect the locking status of the cab and features the coordinated operation of hydraulic drive and mechanical latch, thereby improving safety and ease of operation.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a mechanical hydraulic lock, comprising a lock body and a latch movably disposed on the lock body;

[0006] The lock body is provided with a first lock groove, and the latch is provided with a second lock groove that cooperates with the first lock groove for locking;

[0007] The lock body is provided with a limiting component that restricts or releases the movement of the latch;

[0008] The limiting member is rotatably mounted on the lock body, and the lock body is provided with a hydraulic push rod that drives the limiting member to rotate in order to restrict or release the movement of the latch.

[0009] In the above scheme, preferably, the lock body is provided with a first rotating shaft, the latch is rotatably mounted on the first rotating shaft, and the first rotating shaft is provided with a first torsion spring that cooperates with the latch.

[0010] In the above scheme, preferably, a second locking groove is provided on one side of the latch, and a swing arm that cooperates with the limiting member is provided on the other side.

[0011] In the above scheme, preferably, the lock body is provided with a second rotating shaft that cooperates with the limiting member, and the second rotating shaft is provided with a second torsion spring that cooperates with the limiting member.

[0012] In the above scheme, preferably, the lock body is provided with a limiting pin that abuts against the second torsion spring.

[0013] In the above scheme, preferably, one end of the limiting member is provided with a drive arm that cooperates with the hydraulic push rod, and the other end is provided with a connecting arm that cooperates with the swing arm.

[0014] In the above scheme, preferably, the lock body is provided with a sensing unit that cooperates with the connecting arm. After the connecting arm swings, the sensing unit is triggered to transmit a trigger signal to the driver's cab.

[0015] In the above scheme, preferably, the connecting arm includes an abutting part and a connecting part, and the swing arm is provided with an abutting surface that cooperates with the abutting part and a sliding surface that cooperates with the connecting part.

[0016] In the above scheme, preferably, the hydraulic push rod includes an oil inlet, a push rod, and a hydraulic cylinder, and the oil inlet is connected to a hydraulic oil injection pipe.

[0017] In the above scheme, preferably, the sensing unit is a flexible sensing switch, including a flexible pin and a plug-in part. After the connecting arm swings, it contacts and presses against the flexible pin to trigger the sensing unit. The plug-in part is connected to the cab control unit through a wiring harness.

[0018] The beneficial effects of this utility model are as follows: This utility model controls the locking and releasing of the latch by driving the limit member to rotate through the hydraulic push rod, realizing the mechanical hydraulic linkage and labor-saving operation; its core beneficial effect lies in the innovative integration of the sensing unit, which can monitor and provide feedback on the precise position status of the limit member (i.e., the lock) in real time, thereby effectively solving the problem of the unknown status of the traditional mechanical locking mechanism, and greatly avoiding the safety risk of the cab accidentally overturning due to the lock not being fully locked or accidental failure;

[0019] Meanwhile, the automatic reset function of the first and second torsion springs ensures the reliability and stability of the operation of each component, significantly improving the safety, reliability and maintainability of the heavy truck cab locking system as a whole. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0021] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0022] Figure 3 This is a schematic diagram of the internal three-dimensional structure of the lock body of this utility model.

[0023] Figure 4 This is a schematic diagram of the locking and limiting components of this utility model. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments: See below Figures 1-4 .

[0025] A mechanical hydraulic lock includes a lock body 1 and a latch 2 movably disposed on the lock body 1, such as... Figure 1 and Figure 2 As shown, the latch 2 is rotatably disposed at the lower left of the lock body 1. The lower left of the lock body 1 has a first lock groove 101 with an opening to the left. The first lock groove 101 is semi-circular. Specifically, the lock body 1 is formed by connecting two sheet metal parts that are mirror-symmetrically arranged at the front and rear. The first lock groove 101 is disposed through the sheet metal parts.

[0026] The latch 2 is rotatably disposed between the symmetrically arranged sheet metal parts. The latch 2 is an irregular plate shape, that is, its thickness direction is clamped by the sheet metal parts, and it is rotatably connected to the lock body 1 through the first rotating shaft 102 at the lower right corner of the latch 2.

[0027] The latch 2 has a second locking groove 201 on the side near the first locking groove 101. The second locking groove 201 is arc-shaped, and its arc diameter is the same as, close to, or equal to the semi-circular arc diameter of the first locking groove 101. When the latch 2 is in the locked state relative to the lock body 1, that is, when... Figure 2 In the indicated state, the first locking groove 101 and the second locking groove 201 are spatially intersecting, that is, the opening direction of the first locking groove 101 and the opening direction of the second locking groove 201 are at a certain angle, so that the locking shaft, which is synchronously inserted into the first locking groove 101 and the second locking groove 201, is difficult to slide out of the above-mentioned locking grooves. In this embodiment, the locking shaft can be set on the cab, and the lock body of the hydraulic lock can be fixedly set on the heavy truck body. The separation of the cab and the vehicle body is achieved by the cooperation of the locking shaft and the lock body 1.

[0028] A first torsion spring 103 is sleeved on the first rotating shaft 102 to cooperate with the latch 2. One end of the first torsion spring 103 abuts against the lower right wall of the latch 2, and the other end is fixed to the lock body 2, thereby making the latch 2... Figure 2 In the state shown, there is always a force that rotates clockwise around the first rotating shaft 102, so that the opening directions of the first locking groove 101 and the second locking groove 201 are in a spatial angle intersection state.

[0029] To make it difficult for the latch 2 to move along the locking shaft when it is under external force. Figure 2 The locking shaft slips out when rotated counterclockwise in the indicated direction. In this embodiment, a limiting member 3 that cooperates with the latch 2 is provided on the lock body 1. The limiting member 3 is rotatably disposed above the first lock groove 101. Figure 2 and Figure 3 As shown, the limiting member 3, when activated, restricts or releases the rotation of the latch 2.

[0030] The lock body 1 is provided with a second rotating shaft 104 that cooperates with the limiting member 3. A second torsion spring 105 is provided on the second rotating shaft 104. The lock body 1 is provided with a limiting pin 106 that cooperates with the second torsion spring 105. Figure 2 As shown, the second torsion spring 105 is sleeved on the second rotating shaft 104, with one end abutting against the side of the limiting pin 106 facing the first locking groove 101, and the other end engaging with the wall of the limiting member 3 located on the upper right side of the second rotating shaft 104, so that the limiting member 3 always has a tendency to move along the shaft when no force is applied. Figure 2 The force that causes clockwise rotation is shown.

[0031] The latch 2 has a second locking groove 201 on the side near the first locking groove 101, and a swing arm 202 that abuts against the limiting member 3 on the side away from the first locking groove 101, tilting to the upper right corner. The lock body 1 is provided with a hydraulic push rod 4 that drives the limiting member 3 to rotate, thereby restricting or releasing the movement of the latch 2. One end of the limiting member 3 is provided with a drive arm 301 that cooperates with the hydraulic push rod 4, and the other end is provided with a connecting arm 302 that cooperates with the swing arm 202. The connecting arm 302 restricts the latch 2 from moving along the first locking groove 101. Figure 2 Rotate counterclockwise as shown to prevent the locking shaft from slipping out, as... Figure 2 and Figure 3 As shown.

[0032] The connecting arm 302 includes an abutting part 303 and a connecting part 304. The swing arm 202 is provided with an abutting surface 203 that cooperates with the abutting part 303 and a sliding surface 204 that cooperates with the connecting part 304. When the locking shaft is in the locked state, i.e. Figure 2 In the indicated state, the contact part 303 abuts against the contact surface 203, causing the latch 2 to form a counterclockwise rotation dead point, and a limiting protrusion protruding towards the connecting arm 302 is formed between the contact surface 203 and the sliding surface 204. At this time, one end of the limiting member 3 abuts against the top rod 402 of the hydraulic push rod 4, and the other end abuts against the contact surface 203, so that the limiting member 3 and the latch 2 are in a static and fixed state.

[0033] The hydraulic push rod 4 includes an oil inlet 401, a push rod 402, and a hydraulic cylinder 403. The oil inlet 401 is connected to a hydraulic oil inlet pipe to provide hydraulic pressure to the hydraulic cylinder 403, thereby enabling the push rod 402 to move along... Figure 2The lever 402 is pushed to the left in the indicated direction to drive the limiting member 3. Specifically, when the hydraulic lock latch 2 needs to be unlocked, oil is injected into the hydraulic cylinder 403 through the oil inlet 401, and the push rod 402 is pushed to the left, so that the limiting member 3 overcomes the elastic force of the second torsion spring 105 and rotates counterclockwise. At this time, the contact part 303 slips off from the contact surface 203 and disengages from contact. After the connecting part 304 rotates counterclockwise, it forms a connecting groove for the contact surface 203 to pass through. At this time, the locking shaft is pulled out to the left, and the latch 2 overcomes the elastic force of the first torsion spring 103 and rotates counterclockwise, so that the opening directions of the first lock groove 101 and the second lock groove 201 tend to be in the same direction, thereby realizing the disengagement of the locking shaft and further realizing the separation of the cab from the heavy truck body.

[0034] The lock body 1 is equipped with a sensing unit 5 that cooperates with the connecting arm 302. After the connecting arm 302 swings counterclockwise, it triggers the sensing unit 5 to transmit a trigger signal to the cab. The sensing unit 5 is a flexible sensing switch, including a flexible pin 501 and a plug part 502. After the connecting arm 302 swings, it contacts and presses against the flexible pin 501 to trigger the sensing unit 5. The plug part 502 is connected to the cab control unit through a wiring harness, so that the operator in the cab can directly receive the unlocking signal of the hydraulic lock latch 2.

[0035] The working process of using the mechanical hydraulic lock as described above:

[0036] 1. Hydraulic unlocking process

[0037] When unlocking is required, the hydraulic system injects oil into the hydraulic cylinder 403 through the oil inlet 401 of the hydraulic push rod 4; the hydraulic pressure pushes the push rod 402 to extend to the left.

[0038] The push rod 402 pushes the drive arm 301 of the limiting member 3, forcing the limiting member 3 to overcome the torque of the second torsion spring 105 and rotate counterclockwise around the second rotating shaft 104; after the limiting member 3 rotates, the contact part 303 of its connecting arm 302 slides off the contact surface 203 of the swing arm 202, releasing the rotation restriction on the latch 2.

[0039] Pulling the locking shaft outward forces the latch 2 to overcome the torque of the first torsion spring 103 and rotate counterclockwise around the first rotating shaft 102. After the latch 2 rotates, the opening direction of the second locking groove 201 and the first locking groove 101 tends to be consistent, and the locking shaft can slide out. When the limiting member 3 rotates counterclockwise, its connecting arm 302 presses against the elastic pin 501 of the sensing unit 5, triggering a signal that is transmitted to the cab control unit through the wiring harness of the plug part 502, displaying the unlocked status.

[0040] 2. Mechanical reset and relocking

[0041] The hydraulic system is depressurized, and the push rod 402 retracts; the limiter 3 resets clockwise under the torque of the second torsion spring 105.

[0042] Insert the locking shaft and push the cab back into place. Under the action of the first torsion spring 103, the latch 2 rotates clockwise, causing the second locking groove 201 to engage the locking shaft again.

[0043] The sliding surface 204 of the swing arm 202 slides along the connecting part 304 of the reset connecting arm 302 until the contact surface 203 abuts against the contact part 303 again, forming a dead point again and restoring the locked state.

[0044] After the limiter 3 is reset, the connecting arm 302 separates from the sensing unit 5, the signal is interrupted, and the feedback locking is completed.

[0045] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A mechanical hydraulic lock, characterized in that: Includes a lock body (1) and a latch (2) movably mounted on the lock body (1); The lock body (1) is provided with a first lock groove (101), and the latch (2) is provided with a second lock groove (201) that cooperates with the first lock groove (101) for locking. The lock body (1) is provided with a limiting member (3) that restricts or releases the movement of the latch (2); The limiting member (3) is rotatably mounted on the lock body (1), and the lock body (1) is provided with a hydraulic push rod (4) that drives the limiting member (3) to rotate so as to restrict or release the movement of the latch (2).

2. A mechanical hydraulic lock according to claim 1, characterized in that: The lock body (1) is provided with a first rotating shaft (102), the latch (2) is rotatably mounted on the first rotating shaft (102), and the first rotating shaft (102) is provided with a first torsion spring (103) that cooperates with the latch (2).

3. A mechanical hydraulic lock according to claim 1, characterized in that: The latch (2) has a second locking groove (201) on one side and a swing arm (202) that cooperates with the limiting member (3) on the other side.

4. A mechanical hydraulic lock according to claim 1, characterized in that: The lock body (1) is provided with a second rotating shaft (104) that cooperates with the limiting member (3), and the second rotating shaft (104) is provided with a second torsion spring (105) that cooperates with the limiting member (3).

5. A mechanical hydraulic lock according to claim 4, characterized in that: The lock body (1) is provided with a limiting pin (106) that abuts against the second torsion spring (105).

6. A mechanical hydraulic lock according to claim 3, characterized in that: The limiting member (3) has a drive arm (301) at one end that cooperates with the hydraulic push rod (4), and a connecting arm (302) at the other end that cooperates with the swing arm (202).

7. A mechanical hydraulic lock according to claim 6, characterized in that: The lock body (1) is provided with a sensing unit (5) that cooperates with the connecting arm (302). After the connecting arm (302) swings, the sensing unit (5) is triggered to transmit the trigger signal to the cab.

8. A mechanical hydraulic lock according to claim 6, characterized in that: The connecting arm (302) includes an abutting part (303) and a connecting part (304). The swing arm (202) is provided with an abutting surface (203) that cooperates with the abutting part (303) and a sliding surface (204) that cooperates with the connecting part (304).

9. A mechanical hydraulic lock according to claim 1, characterized in that: The hydraulic push rod (4) includes an oil inlet (401), a push rod (402), and a hydraulic cylinder (403). The oil inlet (401) is connected to a hydraulic oil injection pipe.

10. A mechanical hydraulic lock according to claim 7, characterized in that: The sensing unit (5) is a flexible sensing switch, including a flexible pin (501) and a plug-in part (502). After the connecting arm (302) swings, it contacts and presses against the flexible pin (501) to trigger the sensing unit (5). The plug-in part (502) is connected to the cab control unit through a wiring harness.

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