Oil cylinder locking device and oil cylinder

Abstract

The invention provides an oil cylinder locking device and an oil cylinder, and belongs to the technical field of oil cylinders. The oil cylinder locking device comprises a supporting frame, a locking head and a driving assembly. The supporting frame and the cylinder body define a containing space used for containing a piston rod of the oil cylinder, and one end of the piston rod is provided with a first clamping structure. The locking head is located in the supporting frame and can rotate relative to the supporting frame, and the side, facing the containing space, of the locking head is provided with a second clamping structure; the driving assembly is located on the side, away from the containing space, of the supporting frame and connected with the supporting frame and the locking head, and the driving assembly is used for driving the locking head to rotate after the first clamping structure moves to the target position in the containing space along with the piston rod. And the second clamping structure is clamped with the first clamping structure. According to the invention, the labor cost can be reduced, and the self-locking efficiency of the oil cylinder is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of oil cylinders, and in particular relates to an oil cylinder locking device and an oil cylinder. Background Art

[0002] The oil cylinder is a device that converts the pressure of hydraulic oil into power, and its characteristics are high reliability and large force. During the operation of the oil cylinder, if the piston rod needs to remain motionless in the cylinder body (for example, when it is in a non-working state and the oil cylinder moves to the target position of the cylinder body), the oil cylinder locking device is required to achieve self-locking of the oil cylinder.

[0003] In the related art, the oil cylinder locking device is generally a mechanical nut type self-locking structure. The oil cylinder locking device includes a nut and a screw. The screw is connected to the piston rod of the oil cylinder and can move relative to the cylinder body. When the oil cylinder is in a non-working state, after the piston rod moves to the required position in the cylinder body, the nut is tightened on the screw and the nut is pressed against the cylinder body, thereby locking the piston rod and realizing the self-locking of the oil cylinder.

[0004] However, when the piston rod of the oil cylinder moves to the required position in the cylinder body, the nut is manually rotated to the bottom and in contact with the cylinder body to achieve the locking effect. This not only increases labor costs and labor intensity, but also makes it inconvenient for personnel to smoothly construct in certain harsh environments (such as underground, downhole and some dangerous places). In addition, the manual tightening of the nut lags behind the movement of the piston rod to the required position in the cylinder body, and the oil cylinder cannot self-lock in time, affecting efficiency. Moreover, for some special working conditions, safety accidents may be caused due to the time interval. Summary of the invention

[0005] The disclosed embodiment provides a cylinder locking device and a cylinder, which can reduce labor costs and improve the self-locking efficiency of the cylinder. The technical solution is as follows:

[0006] The disclosed embodiment provides a cylinder locking device, which includes a support frame, a locking head and a driving assembly; the support frame is used to be connected to the cylinder body of the cylinder, and defines a accommodating space for accommodating a piston rod of the cylinder with the cylinder body, and one end of the piston rod has a first clamping structure; the locking head is located in the support frame and can rotate relative to the support frame, and the locking head has a second clamping structure on a side facing the accommodating space; the driving assembly is located on a side of the support frame away from the accommodating space, and is respectively connected to the support frame and the locking head, and the driving assembly is used to drive the locking head to rotate after the first clamping structure moves to a target position in the accommodating space along with the piston rod, so that the second clamping structure is clamped with the first clamping structure.

[0007] In another implementation of the present disclosure, the second clamping structure includes a cross bar and a vertical bar connected vertically, the cross bar is located between the vertical bar and the driving assembly, and the length direction of the cross bar is the same as the direction of the rotation axis of the locking head; the first clamping structure includes a limiting hole and a limiting groove, the limiting hole is located on the end surface of the piston rod, the limiting groove is located on the side of the limiting hole away from the locking head, and is located inside the piston rod, and the limiting groove is connected to the limiting hole; the limiting hole is used for the vertical rod to pass through, and the limiting groove is used to cooperate with the vertical rod after the locking head is rotated to limit the position of the vertical rod in the axial direction of the piston rod.

[0008] In another implementation of the present disclosure, the cylinder locking device also includes a stop assembly, which is located on the outer periphery of the locking head and is movably connected to the support frame and the locking head respectively, and the stop assembly can move between a first position and a second position relative to the locking head. When the stop assembly is in the first position, the stop assembly is partially located in the locking head to prevent the locking head from rotating, and when the stop assembly is in the second position, the stop assembly is disengaged from the locking head.

[0009] In another implementation of the present disclosure, the stop assembly includes an interlocking rod, a middle portion of which is movably located in the support frame, a length direction of the interlocking rod is the direction of the rotation axis of the locking head, and when the stop assembly is in the first position, one end of the interlocking rod is located in the locking head, and when the stop assembly is in the second position, one end of the interlocking rod is located outside the locking head.

[0010] In another implementation of the present disclosure, the cylinder locking device also includes a connecting piece and a linkage assembly, wherein a portion of the connecting piece is located in the accommodating space and is connected to the piston rod; the linkage assembly is located on the side of the connecting piece facing the locking head, and the linkage assembly includes a first part and a second part, the first part is connected to the connecting piece, the second part can move relative to the support frame along the axial direction of the piston rod, the second part is connected to an end of the interlocking rod away from the locking head, and the second part is used to cooperate with the first part so that after the first part follows the piston rod to move to the target position, the second part can drive the interlocking rod to move away from the locking head.

[0011] In yet another implementation of the present disclosure, the linkage assembly includes a connecting block, a guide rod and a trigger rod, the connecting block and the guide rod are the second part, and the connecting block is connected to the interlocking rod;

[0012] The guide rod is parallel to the interlocking rod, the middle part of the guide rod is slidably matched with the support frame, and one end of the guide rod is connected to the connecting block;

[0013] The trigger rod is the first part, the trigger rod is located between the connecting piece and the guide rod, and is coaxially arranged with the guide rod, one end of the trigger rod is connected to the connecting piece, and the other end of the trigger rod is used to collide with the other end of the guide rod after the piston rod moves to the target position.

[0014] In yet another implementation of the present disclosure, the linkage assembly further includes a first elastic member, which is sleeved outside the guide rod, and has two ends clamped between the support frame and an outer wall of the guide rod.

[0015] In another implementation of the present disclosure, at least one groove is provided in the support frame, and the at least one groove is arranged at intervals along the circumferential direction of the rotation trajectory of the locking head; the cylinder locking device also includes a handle, the handle is located at the outer periphery of the locking head, one end of the handle is connected to the side wall of the locking head, and the other end of the handle is located outside the support frame, the handle can rotate relative to the support frame, and along the radial direction of the rotation trajectory of the locking head, the handle can move between a third position and a fourth position, when the handle is located in the third position, the other end portion of the handle is clamped in one of the grooves, and when the handle is located in the fourth position, the handle is misaligned with all the grooves.

[0016] In another implementation of the present disclosure, the handle includes a handle shaft, a second elastic member and a handle shell; one end of the handle shaft is connected to the side wall of the locking head, and the length direction of the handle shaft is the radial direction of the rotation trajectory of the locking head; the handle shell is sleeved outside the handle shaft and can move relative to the handle shaft along the length direction of the handle shaft, and the handle shell can be stuck in the groove; the second elastic member is sleeved outside the handle shaft, and both ends are clamped between one end of the handle shell facing the locking head and one end of the handle shaft away from the locking head.

[0017] In another implementation of the present disclosure, a cylinder is further provided, which includes a cylinder body, a piston rod and a cylinder locking device, wherein the piston rod is movably located in the cylinder body, and both ends of the piston rod are respectively located outside the cylinder body; the cylinder locking device is respectively connected to the cylinder body and the piston rod, and the cylinder locking device is the cylinder locking device described above.

[0018] The technical solution provided by the embodiments of the present disclosure has the following beneficial effects:

[0019] When the oil cylinder locking device provided by the embodiment of the present disclosure is used in the oil cylinder to realize the self-locking of the oil cylinder, since the oil cylinder locking device includes a support frame, and the support frame is connected to the cylinder body of the oil cylinder and defines an accommodation space for accommodating the piston rod, the support frame can provide an installation base for the locking head and the driving assembly, etc., and can also provide an accommodation space for the piston rod when the piston rod moves to the target position.

[0020] Since the oil cylinder locking device further comprises a locking head and a driving assembly, and the locking head has a second clamping structure on one side facing the accommodating space, and the driving assembly is used to drive the locking head to rotate after the first clamping structure moves to the target position in the accommodating space along with the piston rod, so that the second clamping structure is clamped with the first clamping structure. Therefore, when the piston rod moves to the target position of the accommodating space and the piston rod needs to be stationary, the driving assembly can drive the locking head to rotate so that the second clamping structure is clamped with the first clamping structure, thereby limiting the movement of the piston rod through the locking head, which realizes the self-locking of the oil cylinder.

[0021] It can be seen that the above cylinder locking device can cooperate with the locking head after the piston rod moves to the target position, and then under the drive of the driving component, the locking head and the piston rod are engaged to achieve self-locking, avoiding manual operation and greatly improving efficiency and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A structural schematic diagram of a cylinder locking device is provided for an embodiment of the present disclosure;

[0024] Figure 2 for Figure 1 The cross-sectional view along the AA direction;

[0025] Figure 3 for Figure 2 Schematic diagram of the structure when the middle piston rod moves to the target position;

[0026] Figure 4 for Figure 2 Enlarged view of the center left portion;

[0027] Figure 5 It is a structural schematic diagram of the locking head;

[0028] Figure 6 for Figure 3Cross-sectional view along direction BB;

[0029] Figure 7 for Figure 6 A magnified view of the structure in the upper middle part;

[0030] Figure 8 for Figure 4 Front view of the middle handle;

[0031] Fig. 9 for Figure 1 A front view of

[0032] Fig.10 for Figure 6 Schematic diagram of the structure along CC direction;

[0033] Fig.11 for Fig. 9 Schematic diagram of the structure in the D direction.

[0034] The symbols in the figure mean the following:

[0035] 101, cylinder body; 102, piston rod; 1020, first clamping structure; 1021, limiting hole; 1022, limiting groove; 103, pad; 100, accommodating space;

[0036] 1. Support frame; 10. Groove; 11. End cover; 111. One-way oil cup; 110. Limiting ring groove; 12. Connecting sleeve; 120. Weight reduction hole; 13. Lubricating bottom plate; 14. Lubricating top plate; 1100. Lubricating flow channel; 130. First lubricating channel; 140. Second lubricating channel;

[0037] 2. Locking head; 21. Second clamping structure; 210. Clamping slot; 211. Crossbar; 212. Vertical bar; 230. Insertion slot; 22. Columnar body; 23. Protrusion; 24. Locking block;

[0038] 3. Drive components;

[0039] 4. Stop assembly; 41. Interlocking rod;

[0040] 5. Connectors;

[0041] 6. linkage assembly; 61. connecting block; 62. guide rod; 63. trigger rod; 64. first elastic member;

[0042] 7. handle; 71. handle shaft; 72. second elastic member; 73. handle shell; 731. convex block; 74. limit block;

[0043] 200. Touch detection switch. DETAILED DESCRIPTION

[0044] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0045] The disclosed embodiment provides an oil cylinder locking device for locking and limiting the piston rod of the oil cylinder, thereby realizing self-locking of the oil cylinder.

[0046] Figure 1 A structural schematic diagram of a cylinder locking device is provided for an embodiment of the present disclosure, such as Figure 1 As shown, the oil cylinder includes a cylinder body 101 and a piston rod 102. The middle part of the piston rod 102 is located in the cylinder body 101, and the middle part of the piston rod 102 is covered with a piston head, and the piston head is in sealing contact with the cylinder body 101. Both ends of the piston rod 102 extend out of the cylinder body 101. One end of the piston rod 102 is used to output power, and the other end is used to connect with the oil cylinder locking device.

[0047] It should be noted that the cylinder locking device provided in the embodiment of the present disclosure realizes the self-locking of the cylinder after the piston rod 102 moves to the target position of the cylinder body 101 (that is, the target position of the accommodating space 100 mentioned below). The target position refers to the position where the piston head on the piston rod 102 abuts against the side of the cylinder body 101 away from the power output end of the piston rod 102 and cannot move.

[0048] The oil cylinder locking device comprises a support frame 1, a locking head 2 and a driving assembly 3.

[0049] Figure 2 for Figure 1 The cross-sectional view along the AA direction, combined with Figure 2 The support frame 1 is used to be connected to the cylinder body 101 of the oil cylinder, and defines an accommodation space 100 for accommodating the piston rod 102 with the cylinder body 101. One end of the piston rod 102 has a first clamping structure 1020.

[0050] The locking head 2 is located in the support frame 1 and can rotate relative to the support frame 1 . The locking head 2 has a second clamping structure 21 on one side facing the accommodating space 100 .

[0051] The driving component 3 is located on a side of the support frame 1 away from the accommodating space 100, and is respectively connected to the support frame 1 and the locking head 2. The driving component 3 is used to drive the locking head 2 to rotate after the first clamping structure moves to the target position in the accommodating space 100 along with the piston rod 102, so that the second clamping structure 21 is clamped with the first clamping structure 1020.

[0052] When the oil cylinder locking device provided by the embodiment of the present disclosure is used in the oil cylinder to realize the self-locking of the oil cylinder, since the oil cylinder locking device includes a support frame 1, and the support frame 1 is connected to the cylinder body 101 of the oil cylinder and defines together a receiving space 100 for receiving the piston rod 102. Therefore, the support frame 1 can provide a mounting base for the locking head 2 and the driving assembly 3, etc., and can also provide a receiving space for the piston rod 102 when the piston rod 102 moves to the target position.

[0053] Since the oil cylinder locking device further includes a locking head 2 and a driving assembly 3, and the locking head 2 has a second clamping structure 21 on one side facing the accommodating space 100. And the driving assembly 3 is used to drive the locking head 2 to rotate after the first clamping structure 1020 moves to the target position in the accommodating space 100 along with the piston rod 102, so that the second clamping structure 21 is clamped with the first clamping structure 1020. Therefore, when the piston rod 102 moves to the target position of the accommodating space 100, when the piston rod 102 needs to be stationary, at this time, the driving assembly 3 can drive the locking head 2 to rotate, so that the second clamping structure 21 is clamped with the first clamping structure 1020, thereby limiting the movement of the piston rod 102 through the locking head 2, which realizes the self-locking of the oil cylinder.

[0054] It can be seen that after the piston rod 102 moves to the target position, the above cylinder locking device can cooperate with the locking head 2, and then under the drive of the driving component 3, the locking head 2 and the piston rod 102 are engaged to achieve self-locking, avoiding manual operation and greatly improving efficiency and safety.

[0055] Optionally, the second clamping structure 21 includes a cross bar 211 and a vertical bar 212 which are vertically connected, the cross bar 211 is located between the vertical bar 212 and the driving assembly 3, and the length direction of the cross bar 211 is the same as the direction of the rotation axis of the locking head 2.

[0056] The first clamping structure 1020 includes a limiting hole 1021 and a limiting groove 1022. The limiting hole 1021 is located on the end surface of the piston rod 102. The limiting groove 1022 is located on the side of the limiting hole 1021 away from the locking head 2 and is located inside the piston rod 102. The limiting groove 1022 is connected to the limiting hole 1021.

[0057] Figure 3 for Figure 2 The schematic diagram of the structure when the piston rod moves to the target position, combined with Figure 3 The limiting hole 1021 is used for the vertical rod 212 to pass through, and the limiting groove 1022 is used to cooperate with the vertical rod 212 after the locking head 2 rotates to limit the position of the vertical rod 212 in the axial direction of the piston rod 102.

[0058] The length of the vertical rod 212 is smaller than the length of the limiting hole 1021 and larger than the width of the limiting hole 1021 , and the outer diameter of the horizontal rod 211 is smaller than the inner diameter of the limiting hole 1021 .

[0059] In the above implementation, since the piston rod 102 is provided with the limiting hole 1021 and the limiting groove 1022, when the piston rod 102 is located at the target position of the accommodating space 100, if the limiting hole 1021 in the piston rod 102 is exactly aligned with the vertical rod 212, the vertical rod 212 will pass through the limiting hole 1021 and then be located in the limiting groove 1022. Since the length of the vertical rod 212 is less than the length of the limiting hole 1021 and greater than the width of the limiting hole 1021, after the locking head 2 is driven by the driving assembly 3 to rotate, the vertical rod 212 will be misaligned with the limiting hole 1021 and mutually engaged, so that the piston rod 102 and the locking head 2 can be connected together, thereby achieving self-locking.

[0060] That is to say, the above structure can easily realize the clamping connection between the piston rod 102 and the locking head 2, thereby realizing the self-locking of the oil cylinder.

[0061] In other examples, the second clamping structure 21 and the first clamping structure 1020 may also be interchangeable. As long as the clamping of the two can be achieved, the present disclosure does not impose any limitation on this.

[0062] The second clamping structure 21 and the first clamping structure 1020 may also be other structures. For example, a connecting rod and a hook, the hook is rotatably connected to the connecting rod. When the piston rod 102 moves to the target position, the hook is driven by the driving assembly to rotate to the connecting ring on the end surface of the piston rod 102, and the hook is hooked with the connecting ring. The self-locking of the oil cylinder can be achieved.

[0063] Figure 4 for Figure 2 Enlarged view of the middle left part, combined with Figure 4 Optionally, the cylinder locking device also includes a stop assembly 4, which is located at the outer periphery of the locking head 2 and is movably connected to the support frame 1 and the locking head 2 respectively. The stop assembly 4 can move between a first position and a second position relative to the locking head 2. When the stop assembly 4 is in the first position, the stop assembly 4 is partially located in the locking head 2 to prevent the locking head 2 from rotating. When the stop assembly 4 is in the second position, the stop assembly 4 is disengaged from the locking head 2.

[0064] In the above implementation, the stop assembly 4 is used to lock the locking head 2 so that when the piston rod 102 has not moved to the target position in the accommodating space 100, the locking head 2 will not rotate, so that the second clamping structure 21 in the locking head 2 can be aligned with the first clamping structure 1020 in the piston rod 102, so as to facilitate the cooperation between the two and prepare for the two to be clamped together.

[0065] Optionally, the stop assembly 4 includes an interlocking rod 41, the middle part of which is movably located in the support frame 1, and the length direction of the interlocking rod 41 is the direction of the rotation axis of the locking head 2. When the stop assembly 4 is in the first position, one end of the interlocking rod 41 is located in the locking head 2, and when the stop assembly 4 is in the second position, one end of the interlocking rod 41 is located outside the locking head 2.

[0066] In the above implementation, the interlocking rod 41 is used to be inserted into the locking head 2 so as to prevent the locking head 2 from rotating.

[0067] That is, when the rotation of the locking head 2 needs to be restricted, the interlocking rod 41 can be pushed to move into the locking head 2. If the locking head 2 needs to rotate, the interlocking rod 41 can also be pushed to move the interlocking rod 41 away from the locking head 2. The control of the movement of the interlocking rod 41 can be manual or with the help of other drive components, such as motors and screws.

[0068] Combination Figure 2 and Figure 3 Optionally, the cylinder locking device further includes a connecting member 5 and a linkage assembly 6 , wherein a portion of the connecting member 5 is located in the accommodating space 100 and is connected to the piston rod 102 .

[0069] The linkage assembly 6 is located on the side of the connecting member 5 facing the locking head 2, and the linkage assembly 6 includes a first part and a second part, the first part is connected to the connecting member 5, the second part can move relative to the support frame 1 along the axial direction of the piston rod 102, the second part is connected to the end of the interlocking rod 41 away from the locking head 2, and the second part is used to cooperate with the first part so that after the first part follows the piston rod 102 to move to the target position, the second part can drive the interlocking rod 41 to move away from the locking head 2.

[0070] In the above implementation, the connecting member 5 is used to be connected to the piston rod 102 so as to move along with the piston rod 102 .

[0071] The first part of the linkage assembly 6 is used to be connected to the connecting member 5 so as to move synchronously with the piston rod 102. The second part of the linkage assembly 6 is used to cooperate with the first part, and after the piston rod 102 moves to the target position of the accommodating space 100, the interlocking rod 41 moves away from the locking head 2, so that the stop assembly 4 is in the second position.

[0072] That is, the first part of the linkage assembly 6 is used to connect with the piston rod 102 through the connecting piece 5, so that after the piston rod 102 moves to the target position, it can feedback to the second part, so that the second part can drive the interlocking rod 41 to move out of the locking head 2.

[0073] Optionally, the linkage assembly 6 includes a connecting block 61 , a guide rod 62 and a trigger rod 63 , wherein the connecting block 61 and the guide rod 62 are the second part, and the connecting block 61 is connected to the interlocking rod 41 .

[0074] The guide rod 62 is parallel to the interlocking rod 41 , the middle portion of the guide rod 62 is slidably matched with the support frame 1 , and one end of the guide rod 62 is connected to the connecting block 61 .

[0075] The trigger rod 63 is the first part. The trigger rod 63 is located between the connecting member 5 and the guide rod 62 and is coaxially arranged with the guide rod 62. One end of the trigger rod 63 is connected to the connecting member 5, and the other end of the trigger rod 63 is used to collide with the other end of the guide rod 62 after the piston rod 102 moves to the target position.

[0076] In the above implementation, the connecting block 61 is used to connect with the interlocking rod 41, so as to provide a mounting base for the guide rod 62. The guide rod 62 is used to collide with the trigger rod 63 on the one hand, and is used to connect with the interlocking rod 41 through the connecting block 61 on the other hand. When the piston rod 102 moves to the target position of the accommodating space 100, the trigger rod 63 will hit the guide rod 62, and the guide rod 62 will move away from the locking head 2 with the interlocking rod 41 when impacted, so that the locking head 2 can rotate freely.

[0077] That is, when the piston rod 102 moves to the target position of the accommodating space 100 , the trigger rod 63 will mechanically impact the guide rod 62 , and the guide rod 62 will leave the locking head 2 with the interlocking rod 41 after the impact.

[0078] Exemplarily, the trigger rod 63 is a trigger bolt connected to the connector 5 by a thread. The trigger rod 63 can move together with the piston rod 102 of the oil cylinder, so that when the piston rod 102 moves to the target position, it mechanically hits the guide rod 62, thereby driving the interlocking rod 41 to withdraw from the locking head 2.

[0079] In the disclosed embodiment, the connecting member 5 is a rod, one end of the connecting member 5 is fixed to the piston rod 102 by a fastening screw, and the other end of the connecting member 5 passes through the support frame 1 and is connected to the trigger rod 63 by a fastening screw. The length direction of the connecting member 5 is perpendicular to the moving direction of the piston rod 102. This facilitates the arrangement of the connecting member 5.

[0080] Optionally, the linkage assembly 6 further includes a first elastic member 64 , which is sleeved outside the guide rod 62 , and two ends of the first elastic member 64 are clamped between the support frame 1 and the outer wall of the guide rod 62 .

[0081] In the above implementation, the first elastic member 64 is used to drive the guide rod 62 to automatically reset after the collision, so that the interlocking rod 41 is reinserted into the locking head 2 to prevent the locking head 2 from rotating.

[0082] In the disclosed embodiment, the first elastic member 64 is a telescopic spring. An outer wall of one end of the guide rod 62 facing the trigger rod 63 is provided with an outer flange, and the outer flange abuts against one end of the first elastic member 64 facing the trigger rod 63.

[0083] Combination Figure 4 The locking head 2 further comprises a columnar body 22 and a protrusion 23. The second clamping structure 21 and the protrusion 23 are respectively connected to the two ends of the columnar body 22. The protrusion 23 is a cylindrical structure. The outer diameter of the protrusion 23 is smaller than the outer diameter of the columnar body 22.

[0084] In addition, in order to facilitate the connection between the locking head 2 and the driving assembly 3, the middle part of the protrusion 23 has an insertion groove 230, and the extension direction of the insertion groove 230 is the direction of the rotation axis of the locking head 2. The driving assembly 3 is partially located in the insertion groove 230 and is connected to the protrusion 23. The insertion groove 230 facilitates the connection between the driving assembly 3 and the locking head 2.

[0085] In order to facilitate processing and manufacturing, the columnar body 22, the protrusion 23 and the second clamping structure 21 are an integrated structural component.

[0086] The driving component 3 is a rotary cylinder. The output end of the rotary cylinder is located in the insertion slot 230 and is connected to the protrusion 23. In other examples, the driving component 3 can also be other structures, such as a motor.

[0087] Figure 5 The structural diagram of the locking head is shown in FIG. Figure 5 , exemplarily, a middle portion of the side wall of the locking head 2 has an annular groove 210 .

[0088] Figure 6 for Figure 3 In the cross-sectional view along the BB direction, the locking head 2 further includes a locking block 24, which is located in the card slot 210 and is connected to the columnar body 22 by a fastening screw. The locking block 24 has a locking hole, and the axis of the locking hole is parallel to the rotation axis of the locking head 2. When the stopper assembly 4 is in the first position, the interlocking rod 41 is inserted into the locking hole.

[0089] Combination Figure 4 Optionally, at least one groove 10 is provided in the support frame 1 , and the at least one groove 10 is arranged at intervals along the circumferential direction of the rotation track of the locking head 2 .

[0090] The cylinder locking device also includes a handle 7, which is located on the outer periphery of the locking head 2, one end of the handle 7 is connected to the side wall of the locking head 2, and the other end of the handle 7 is located outside the support frame 1. The handle 7 can rotate relative to the support frame 1, and along the radial direction of the rotation trajectory of the locking head 2, the handle 7 can move between a third position and a fourth position. When the handle 7 is in the third position, the other end portion of the handle 7 is clamped in one of the grooves 10, and when the handle 7 is in the fourth position, the handle 7 is misaligned with all the grooves 10.

[0091] In the above implementation, the arrangement of the handle 7 allows the locking head 2 to be manually rotated on the one hand, and on the other hand, it is also convenient for the locking head 2 to engage with the groove 10 after it is rotated into place, thereby preventing the locking head 2 from rotating due to the loss of function of the driving component 3.

[0092] That is to say, when the oil cylinder needs to be self-locked, the vertical rod 212 in the locking head 2 passes through the limiting hole 1021 of the piston rod 102 and is located in the limiting groove 1022. At this time, the locking head 2 is rotated to achieve the oil cylinder self-locking. At the same time, the handle 7 is partially located in the groove 10 and is engaged with the groove 10, preventing the locking head 2 from rotating when the driving assembly 3 loses its function.

[0093] Figure 7 for Figure 6 The enlarged view of the structure in the middle and upper part, combined with Figure 7 Optionally, the handle 7 includes a handle shaft 71, a second elastic member 72 and a handle shell 73. One end of the handle shaft 71 is connected to the side wall of the locking head 2, and the length direction of the handle shaft 71 is the radial direction of the rotation track of the locking head 2. The handle shell 73 is sleeved outside the handle shaft 71 and can move relative to the handle shaft 71 along the length direction of the handle shaft 71. The handle shell 73 can be stuck in the groove 10. The second elastic member 72 is sleeved outside the handle shaft 71, and both ends are clamped between one end of the handle shell 73 facing the locking head 2 and one end of the handle shaft 71 away from the locking head 2.

[0094] In the above implementation, the handle shaft 71 is used to be connected to the locking head 2 to provide a mounting base for the handle shell 73. The handle shell 73 is used to be sleeved outside the handle shaft 71 and to move relative to the handle shaft 71 along the length direction of the handle shaft 71 so as to be stuck in the groove 10. The second elastic member 72 is used to apply a pressure to the handle shell 73 so that when the handle shell 73 moves to the groove 10, a part of the structure of the handle shell 73 is just stuck in the groove 10.

[0095] In order to facilitate the installation of the second elastic member 72 , one end of the handle shaft 71 away from the locking head 2 is connected to a limiting block 74 . The limiting block 74 is located in the handle shell 73 and is in sliding contact with the handle shell 73 .

[0096] The limiting block 74 is used to abut against an end of the second elastic member 72 away from the locking head 2 , so that the second elastic member 72 can be squeezed into the handle shell 73 .

[0097] In the disclosed embodiment, the limiting block 74 may be a structure such as a nut or a limiting ring.

[0098] Figure 8 for Figure 4 Front view of the middle handle, combined with Figure 8 In the disclosed embodiment, in order to facilitate the handle shell 73 to be stuck in the groove 10, the outer wall of the handle shell 73 has a protrusion 731 extending along the rotation axis direction of the locking head 2, and the protrusion 731 is used to be stuck in one of the grooves 10. The protrusion 731 is used to be engaged with the groove 10.

[0099] Fig. 9 for Figure 1 Front view of Fig. 9 . Figure 1 for Fig. 9 In addition, in order to further improve the clamping effect between the protrusion 731 and the groove 10, the grooves 10 are arranged in pairs, and the multiple pairs of grooves 10 are evenly spaced along the rotation track of the locking head 2. The two grooves 10 in each pair of grooves 10 are spaced along the axis direction of the locking head 2 on the opposite sides of the handle shell 73. Correspondingly, the protrusions 731 are also arranged in pairs. Each protrusion 731 is arranged corresponding to one of the grooves 10. Each protrusion 731 can be located in the corresponding groove 10.

[0100] In the disclosed embodiment, there may be four pairs of grooves 10, and the four pairs of grooves 10 are evenly distributed in the support frame 1. In this way, the locking head 2 can be located in the groove 10 after rotating 90°, which is convenient for operation.

[0101] In the disclosed embodiment, one end of the handle shaft 71 is located in the slot 210 and arranged opposite to the locking block 24. The handle shaft 71 is connected to the side wall of the locking head 2 by a fastening bolt. The slot 210 can accommodate the handle 7 so that the handle 7 can be connected to the locking head 2.

[0102] Continue to see Fig. 9 Optionally, the support frame 1 includes an end cover 11 and a connecting sleeve 12, one end of the connecting sleeve 12 is connected to the end cover 11, and the other end of the connecting sleeve 12 is connected to the cylinder body 101 of the oil cylinder. The connecting sleeve 12 and the cylinder body 101 define an accommodating space 100. The locking head 2 is located in the connecting sleeve 12 and is in sliding contact with the connecting sleeve 12. The driving assembly 3 is located at one end of the end cover 11 away from the connecting sleeve 12, and is connected to the end cover 11.

[0103] The connecting sleeve 12 is used to connect with the cylinder body 101 so as to provide a receiving space 100 for the piston rod 102. The end cover 11 is used to provide a mounting base for the locking head 2 and the driving assembly 3.

[0104] The end cover 11 is a hollow cylindrical structure. A limiting ring groove 110 is provided in the side wall of the end cover 11, and the center of the circle where the limiting ring groove 110 is located is located on the rotation axis of the locking head 2. The handle 7 is partially located in the limiting ring groove 110. The limiting ring groove 110 is used to accommodate the handle 7, so that when the locking head 2 rotates, the handle 7 can rotate in the limiting ring groove 110.

[0105] Along the rotation axis of the locking head 2 , each pair of grooves 10 is located at opposite sides of the limiting ring groove 110 .

[0106] In the disclosed embodiment, an adjustment pad 103 is sandwiched between the connecting sleeve 12 and the cylinder body 101. The connecting sleeve 12 and the cylinder body 101 are connected together by fasteners such as bolts. The thickness of the adjustment pad 103 can be adjusted on site during assembly to adjust the gap between the locking head 2 and the piston rod 102 to meet the use requirements.

[0107] The side wall of the connecting sleeve 12 has a plurality of weight-reducing holes 120 arranged at intervals along the circumference thereof. The weight-reducing holes 120 are long strips, and the length direction of the weight-reducing holes 120 is the same as the moving direction of the piston rod 102. The two ends of the connecting member 5 pass through two of the weight-reducing holes 120 and are in sliding contact with the hole walls of the weight-reducing holes 120. In this way, not only can the weight of the connecting sleeve 12 be reduced through the weight-reducing holes 120, but also the connecting member 5 can be guided so that the connecting member 5 can only move along the length direction of the weight-reducing holes 120 following the movement of the piston rod 102, thereby preventing the piston rod 102 from deflecting.

[0108] Fig.10 for Figure 6 Schematic diagram of the structure along the CC direction, combined with Fig.10 Optionally, the support frame 1 also includes a lubricating base plate 13 and a lubricating top plate 14, which are respectively located in the end cover 11 along the rotation axis of the locking head 2, and are respectively sleeved on opposite sides of the locking head 2. The lubricating top plate 14 is located between the drive assembly 3 and the locking head 2. The lubricating base plate 13 and the lubricating top plate 14 are both connected to the end cover 11. The lubricating base plate 13 and the lubricating top plate 14 are in sliding contact with the locking head 2. The protrusion 23 is located inside the lubricating top plate 14 and is in sliding contact with the lubricating top plate 14. The protrusion 23 facilitates the lubricating top plate 14 to be sleeved outside the locking head 2, so that the lubricating top plate 14 can be positioned and assembled with the locking head 2.

[0109] The end cover 11 has a lubricating channel 1100 inside. The lubricating bottom plate 13 has a first lubricating channel 130, and the lubricating top plate 14 has a second lubricating channel 140. The lubricating channel 1100 is connected to one end of the first lubricating channel 130 and one end of the second lubricating channel 140 respectively. The other end of the first lubricating channel 130 and the other end of the second lubricating channel 140 are both facing the locking head 2.

[0110] One end of the lubricating flow channel 1100 is connected to a one-way oil cup 111, which is installed in the end cover 11 through a thread. The one-way oil cup 111 is used to manually inject lubricating oil into the lubricating flow channel 1100, while preventing the lubricating oil from flowing out in the reverse direction. In this way, the lubricating oil in the lubricating flow channel 1100 can flow to the locking head 2 through the first lubricating channel 130 and the second lubricating channel 140, so that the friction pair of the locking head 2 is in a lubricated state for a long time, which can effectively prevent the locking head 2 from getting stuck.

[0111] The first lubrication channel 130, the second lubrication channel 140 and the lubrication channel 1100 can be formed by drilling or welding. By regularly injecting lubricating oil into the one-way oil cup 111, the friction pair of the locking head 2 is kept in a lubricated state for a long time, which can effectively prevent jamming.

[0112] Fig.11 for Fig. 9 The structural diagram of the D direction in the Fig.10 Optionally, in order to detect the rotation angle of the locking head 2, at least one touch detection switch 200 is further provided outside the end cover 11. Whether the locking head 2 moves to the right position is detected by touch.

[0113] On the other hand, the embodiment of the present disclosure further provides an oil cylinder, which includes a cylinder body 101, a piston rod 102 and a cylinder locking device. The piston rod 102 is movably located in the cylinder body 101, and both ends of the piston rod 102 are respectively located outside the cylinder body 101.

[0114] The oil cylinder locking device is connected to the cylinder body 101 and the piston rod 102 respectively, and the oil cylinder locking device is the oil cylinder locking device mentioned above.

[0115] The above oil cylinder has the same beneficial effects as the aforementioned oil cylinder locking device, which will not be repeated here.

[0116] The following briefly introduces the working method of the oil cylinder locking device provided in the embodiment of the present disclosure:

[0117] Combination Figure 2When the oil cylinder is in normal working state, the piston rod 102 does not move to the target position of the accommodating space 100. When the locking head 2 is aligned with the limiting hole 1021 on the piston rod 102, the locking head 2 can freely pass through the limiting hole 1021, and the locking head 2 will not have any effect on the piston rod 102.

[0118] Moreover, when the piston rod 102 has not moved to the target position of the accommodating space 100, the first elastic member 64 can make the guide rod 62 move toward the trigger rod 63, and the interlocking rod 41 is inserted into the locking hole of the locking block 24, so that the locking head 2 cannot rotate at will, thereby preventing the locking head 2 from being misoperated when the oil cylinder is in working state. In addition, the handle 7 is located exactly in the groove 10 to prevent unnecessary displacement due to vibration.

[0119] Combination Figure 3 When the oil cylinder is in a non-working state, the piston rod 102 of the oil cylinder moves to the target position, the trigger rod 63 hits the guide rod 62, and the guide rod 62 is subjected to the force to move the interlocking rod 41 away from the locking head 2, and the interlocking rod 41 moves out of the locking hole. The locking head 2 recovers the rotational freedom.

[0120] If the oil cylinder needs to be in this position and maintain it for a long time, the drive assembly 3 can be operated to rotate it 90°. The torque of the drive assembly 3 is greater than the limit of the groove 10 on the handle 7, and the locking head 2 rotates 90°. The second clamping structure 21 on the locking head 2 is clamped with the first clamping structure 1020 in the piston rod 102 to prevent the piston rod 102 of the oil cylinder from moving out.

[0121] The above description is only an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A cylinder locking device, characterized in that: The oil cylinder locking device comprises a support frame (1), a locking head (2) and a driving assembly (3); The support frame (1) is used to be connected to a cylinder body (101) of the oil cylinder, and defines an accommodation space (100) for accommodating a piston rod (102) of the oil cylinder with the cylinder body (101), and one end of the piston rod (102) has a first clamping structure (1020); The locking head (2) is located inside the support frame (1) and is rotatable relative to the support frame (1); the locking head (2) has a second clamping structure (21) on a side facing the accommodating space (100); The driving component (3) is located on a side of the support frame (1) away from the accommodating space (100), and is respectively connected to the support frame (1) and the locking head (2). The driving component (3) is used to drive the locking head (2) to rotate after the first clamping structure (1020) moves to a target position in the accommodating space (100) along with the piston rod (102), so that the second clamping structure (21) is clamped with the first clamping structure (1020).

2. The oil cylinder locking device according to claim 1, characterized in that: The second clamping structure (21) comprises a cross bar (211) and a vertical bar (212) connected vertically, the cross bar (211) is located between the vertical bar (212) and the driving assembly (3), and the length direction of the cross bar (211) is the same as the direction of the rotation axis of the locking head (2); The first clamping structure (1020) comprises a limiting hole (1021) and a limiting groove (1022), wherein the limiting hole (1021) is located on the end surface of the piston rod (102), the limiting groove (1022) is located on a side of the limiting hole (1021) away from the locking head (2) and is located inside the piston rod (102), and the limiting groove (1022) is in communication with the limiting hole (1021); The limiting hole (1021) is used for allowing the vertical rod (212) to pass through, and the limiting groove (1022) is used to cooperate with the vertical rod (212) after the locking head (2) rotates, so as to limit the position of the vertical rod (212) in the axial direction of the piston rod (102).

3. The oil cylinder locking device according to any one of claims 1 to 2, characterized in that: The oil cylinder locking device further comprises a stop assembly (4), wherein the stop assembly (4) is located at the outer periphery of the locking head (2) and is movably connected to the support frame (1) and the locking head (2) respectively; the stop assembly (4) can move between a first position and a second position relative to the locking head (2); when the stop assembly (4) is in the first position, a portion of the stop assembly (4) is located in the locking head (2) to prevent the locking head (2) from rotating; and when the stop assembly (4) is in the second position, the stop assembly (4) is disengaged from the locking head (2).

4. The oil cylinder locking device according to claim 3, characterized in that: The stop assembly (4) comprises an interlocking rod (41), the middle part of which is movably located in the support frame (1), and the length direction of the interlocking rod (41) is the direction of the rotation axis of the locking head (2). When the stop assembly (4) is in the first position, one end of the interlocking rod (41) is located in the locking head (2), and when the stop assembly (4) is in the second position, one end of the interlocking rod (41) is located outside the locking head (2).

5. The oil cylinder locking device according to claim 4, characterized in that: The oil cylinder locking device further comprises a connecting member (5) and a linkage assembly (6); a portion of the connecting member (5) is located in the accommodating space (100) and is connected to the piston rod (102); The linkage assembly (6) is located on a side of the connecting member (5) facing the locking head (2), and the linkage assembly (6) includes a first part and a second part, the first part is connected to the connecting member (5), the second part can move relative to the support frame (1) along the axial direction of the piston rod (102), the second part is connected to an end of the interlocking rod (41) away from the locking head (2), and the second part is used to cooperate with the first part so that after the first part follows the piston rod (102) to move to the target position, the second part can drive the interlocking rod (41) to move away from the locking head (2).

6. The oil cylinder locking device according to claim 5, characterized in that: The linkage assembly (6) comprises a connecting block (61), a guide rod (62) and a trigger rod (63), wherein the connecting block (61) and the guide rod (62) constitute the second part, and the connecting block (61) is connected to the interlocking rod (41); The guide rod (62) is parallel to the interlocking rod (41), the middle part of the guide rod (62) is slidably matched with the support frame (1), and one end of the guide rod (62) is connected to the connecting block (61); The trigger rod (63) is the first part. The trigger rod (63) is located between the connecting member (5) and the guide rod (62) and is coaxially arranged with the guide rod (62). One end of the trigger rod (63) is connected to the connecting member (5), and the other end of the trigger rod (63) is used to collide with the other end of the guide rod (62) after the piston rod (102) moves to the target position.

7. The oil cylinder locking device according to claim 6, characterized in that: The linkage assembly (6) further comprises a first elastic member (64), wherein the first elastic member (64) is sleeved outside the guide rod (62) and has two ends clamped between the support frame (1) and the outer wall of the guide rod (62).

8. The oil cylinder locking device according to any one of claims 1-2 and 4-7, characterized in that: At least one groove (10) is arranged at intervals in the support frame (1), and the at least one groove (10) is arranged at intervals along the circumference of the rotation track of the locking head (2); The oil cylinder locking device further comprises a handle (7), wherein the handle (7) is located at the outer periphery of the locking head (2), one end of the handle (7) is connected to the side wall of the locking head (2), and the other end of the handle (7) is located outside the support frame (1). The handle (7) can rotate relative to the support frame (1), and along the radial direction of the rotation track of the locking head (2), the handle (7) can move between a third position and a fourth position. When the handle (7) is located at the third position, the other end portion of the handle (7) is clamped in one of the grooves (10), and when the handle (7) is located at the fourth position, the handle (7) is misaligned with all of the grooves (10).

9. The oil cylinder locking device according to claim 8, characterized in that: The handle (7) comprises a handle shaft (71), a second elastic member (72) and a handle shell (73); One end of the handle shaft (71) is connected to the side wall of the locking head (2), and the length direction of the handle shaft (71) is the radial direction of the rotation track of the locking head (2); The handle shell (73) is sleeved outside the handle shaft (71) and can move relative to the handle shaft (71) along the length direction of the handle shaft (71), and the handle shell (73) can be stuck in the groove (10); The second elastic member (72) is sleeved outside the handle shaft (71), and its two ends are clamped between one end of the handle shell (73) facing the locking head (2) and one end of the handle shaft (71) away from the locking head (2).

10. An oil cylinder, characterized in that: The oil cylinder comprises a cylinder body (101), a piston rod (102) and an oil cylinder locking device; the piston rod (102) is movably located in the cylinder body (101), and two ends of the piston rod (102) are respectively located outside the cylinder body (101); The oil cylinder locking device is connected to the cylinder body (101) and the piston rod (102) respectively, and the oil cylinder locking device is the oil cylinder locking device according to any one of claims 1 to 9.

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