Hydraulic apparatus self-locking tool

Abstract

The application relates to the field of braking devices, in particular to a hydraulic equipment self-locking tool which comprises a hydraulic cylinder, a hydraulic output shaft arranged on the hydraulic cylinder, a protective shell arranged on the hydraulic cylinder, a rotating unit rotatably arranged on the hydraulic cylinder, and a braking ring fixedly arranged on the hydraulic cylinder and used for cooperating with the rotating unit to brake. The linear extension and contraction movement of the hydraulic output shaft during work is brought into cooperation with a screw thread and a screw block to drive the rotating ring to rotate. When the hydraulic output shaft fails, the instantaneous speed during rapid collapse of the hydraulic output shaft drives the rotating ring to rapidly rotate to generate centrifugal force, the movable ring is thrown out in the direction from the second guide assembly to the first guide assembly, the clamping teeth are clamped with the gear ring, the rotating ring is stopped from rotating, the braking and locking of the hydraulic output shaft are realized through the cooperation of the screw block and the screw thread, the hydraulic output shaft is prevented from further collapsing, and more serious accidents are avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of braking equipment, in particular to a hydraulic equipment self-locking tool. BACKGROUND

[0002] As a key hydraulic actuating element for converting hydraulic energy into mechanical energy, the principle of the hydraulic cylinder is to drive the piston or piston rod to move linearly through the pressure of the liquid, so as to realize the precise control of the mechanical equipment. At present, most hydraulic cylinders have self-locking function, which is mainly used to cope with the situation that the load driven by the hydraulic cylinder rises or is in the hovering state. If power is suddenly cut off or the hydraulic system fails, the self-locking function can immediately lock the current position of the output shaft of the hydraulic cylinder, prevent the load from accidentally sliding down due to gravity, and avoid possible serious safety accidents.

[0003] At present, most hydraulic cylinders realize the self-locking of the output shaft of the hydraulic cylinder by applying friction force to the piston or the output shaft and hydraulic lock. However, the above two methods have the following problems. On the one hand, the braking force of the friction self-locking method is prior, it is difficult to cope with larger load, and the structure is complex, which leads to unreliable self-locking and high maintenance cost. On the other hand, the hydraulic self-locking method needs a complex hydraulic system, high sealing requirement, high component reliability requirement, and the self-locking effect is easily affected by load and temperature change, so it is difficult to achieve stable braking effect. SUMMARY

[0004] In view of the above or the problems existing in the prior art that lead to unreliable self-locking, high maintenance cost and difficult to achieve stable braking effect, the present application is proposed.

[0005] Therefore, the purpose of the present application is to provide a hydraulic equipment self-locking tool.

[0006] To solve the above technical problems, the present application provides the following technical solutions: a hydraulic equipment self-locking tool, comprising a hydraulic cylinder, a hydraulic output shaft arranged on the hydraulic cylinder, a protective shell arranged on the hydraulic cylinder, a rotating unit rotatably arranged on the hydraulic cylinder, and a brake ring fixedly arranged on the hydraulic cylinder and used for cooperating with the rotating unit to brake; the rotating unit comprises a rotating ring rotatably arranged on the hydraulic cylinder and used for cooperating with the hydraulic output shaft, a guide assembly one arranged on the rotating ring, a guide assembly two arranged on the rotating ring, a connecting assembly one arranged on the rotating ring, a connecting assembly two arranged on the rotating ring, and a movable ring arranged outside the rotating ring and used for cooperating with the guide assembly one; the brake ring comprises a fixed ring arranged on the hydraulic cylinder, a gear ring arranged on the fixed ring, and a connecting column arranged on the fixed ring; the hydraulic cylinder is provided with a positioning groove matched with the connecting column; the movable ring is provided with a clamping tooth matched with the gear ring; the connecting assembly one comprises a connecting block three arranged on the movable ring and located on one side close to the clamping tooth, a fixing piece three arranged on the connecting block three, a connecting block four arranged on the fixing piece three, a rotating block one arranged on the connecting block three and used for rotating on the movable ring, and a rotating block two arranged on the connecting block four and used for rotating on the rotating ring; when the movable ring is thrown out, the rotating block one and the rotating block two rotate relative to the rotating ring, drive the connecting block three and the fixing piece three to slide relative to each other while being deflected, adapt to the change of the distance between the rotating block one and the rotating block two, and the fixing piece three is used for limiting the relative position between the connecting block three and the connecting block four to prevent the connecting block four from moving back; the connecting assembly one is provided with multiple groups on the side of the movable ring close to the clamping tooth; the connecting assembly two comprises a connecting block five arranged on the movable ring and located on one side away from the clamping tooth, a fixing piece four arranged on the connecting block five, a connecting block six arranged on the fixing piece four, a rotating block three arranged on the connecting block five and used for rotating on the movable ring, and a rotating block four arranged on the connecting block six and used for rotating on the rotating ring; the connecting assembly two is provided with multiple groups on the side of the movable ring away from the clamping tooth and corresponding to the guide assembly two, and the line connecting the midpoint of each group of the connecting assembly two and the corresponding guide assembly two passes through the center of the rotating ring; the rotating ring is driven to rotate through the linear motion of the hydraulic output shaft, and the centrifugal force generated by rotation throws out the movable ring to cooperate with the brake ring to brake the hydraulic output shaft, lock the current state of the hydraulic output shaft, and prevent the hydraulic output shaft from collapsing.

[0007] As a preferred scheme of the hydraulic equipment self-locking tool, the hydraulic output shaft is provided with a spiral thread, and the rotating ring is provided with a spiral block matched with the spiral thread.

[0008] As a preferred scheme of the hydraulic equipment self-locking tool, the guide assembly one comprises a guide block one arranged on the movable ring, a fixing piece one arranged on the guide block one, and a connecting block one fixedly connected with the rotating ring and arranged on the fixing piece one; the guide assembly one is located at the middle position of the clamping tooth.

[0009] As a preferred scheme of the hydraulic equipment self-locking tool, the guide assembly two comprises a guide block two arranged on the movable ring, a fixing member two arranged on the guide block two, and a connecting block two fixedly connected with the rotating ring and arranged on the fixing member two; and the line connecting the guide assembly two and the midpoint of the guide assembly one passes through the center of the rotating ring.

[0010] As a preferred scheme of the hydraulic equipment self-locking tool, the fixing member one comprises a connecting tooth one fixedly arranged on the connecting block one, a connecting tooth two slidingly arranged on the guide block one, a sliding groove arranged on the guide block one and used for matching the sliding of the connecting tooth two, and a connecting spring having two ends fixedly connected with the connecting tooth two and the sliding groove respectively.

[0011] As a preferred scheme of the hydraulic equipment self-locking tool, the connecting tooth one is provided with an abutting surface one and an inclined surface one, and the connecting tooth two is correspondingly provided with an inclined surface two and an abutting surface two; when the device is in the loosening state, the inclined surface one and the inclined surface two abut against each other; and when the device is in the locking state, the abutting surface one and the abutting surface two abut against each other; and the fixing member one, the fixing member two, the fixing member three, and the fixing member four have the same structure.

[0012] The hydraulic equipment self-locking tool has the following advantages: the linear extension and contraction movement of the hydraulic output shaft during work is brought into play through the cooperation of the screw thread and the screw block, the rotating ring is driven to rotate, when the hydraulic output shaft fails, the centrifugal force generated by the rapid rotation of the rotating ring is brought into play through the instantaneous speed of the rapid collapse of the hydraulic output shaft, the movable ring is thrown out in the direction from the guide assembly two to the guide assembly one, the clamping teeth are clamped with the gear ring, and the rotating ring is stopped from rotating, so that the braking and locking of the hydraulic output shaft are realized through the cooperation of the screw block and the screw thread, the further collapse of the hydraulic output shaft is prevented, more serious accidents are avoided, the structure is relatively simple, a power source for braking does not need to be separately arranged, a complex mechanical clamping mechanism or a large number of hydraulic elements are not needed, the manufacturing cost and the maintenance difficulty are reduced, the influence of the pressure fluctuation of the hydraulic system is avoided, the self-locking stability is high, the displacement of the hydraulic output shaft caused by the leakage or pressure change of the hydraulic oil during the self-locking process is effectively prevented, and the safety and reliability of the equipment are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0014] Figure 1 It is a whole structure schematic view of the hydraulic equipment self-locking tool.

[0015] Figure 2 This is a cross-sectional schematic diagram of the protective housing for a self-locking tool in hydraulic equipment.

[0016] Figure 3 This is a schematic diagram of the spiral pattern of a self-locking tool for hydraulic equipment.

[0017] Figure 4 This is a top view of the rotating unit of a self-locking tool in a hydraulic device.

[0018] Figure 5 This is a schematic diagram of the rotating ring of a self-locking tool in a hydraulic device.

[0019] Figure 6 This is a schematic diagram of the moving ring of a self-locking tool for hydraulic equipment.

[0020] Figure 7 This is an exploded structural diagram of the guide assembly of a self-locking tool for hydraulic equipment.

[0021] Figure 8 This is a cross-sectional structural diagram of the guide block 1 of the self-locking tool for hydraulic equipment.

[0022] Figure 9 This is a schematic diagram of the rotating block 1 of the self-locking tool for hydraulic equipment.

[0023] Figure 10 This is a schematic diagram of the rotating block 2 of the self-locking tool in hydraulic equipment.

[0024] Figure 11 for Figure 7 Enlarged diagram of point B in the middle.

[0025] In the diagram: 1. Hydraulic cylinder; 11. Hydraulic output shaft; 12. Positioning groove; 111. Spiral pattern; 2. Protective shell; 3. Rotating unit; 31. Rotating ring; 311. Spiral block; 32. Guide assembly one; 321. Guide block one; 322. Fixing component one; 3221. Connecting tooth one; 3222. Connecting tooth two; 3223. Sliding groove; 3224. Connecting spring; 323. Connecting block one; 33. Guide assembly two; 331. Guide block two; 332. Fixing component two; 333. Connecting block two; 3 4. Connecting component one; 341. Connecting block three; 342. Fixing component three; 343. Connecting block four; 344. Rotating block one; 345. Rotating block two; 35. Connecting component two; 351. Connecting block five; 352. Fixing component four; 353. Connecting block six; 354. Rotating block three; 355. Rotating block four; 36. Movable ring; 361. Snap-fit ​​tooth; 4. Brake ring; 41. Fixing ring; 42. Gear ring; 43. Connecting post; 5. Abutment surface one; 6. Inclined surface one; 7. Inclined surface two; 8. Abutment surface two. Detailed Implementation

[0026] In order to make the above objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0027] Embodiment 1, refer to Figure 1 Figure 4 For the first embodiment of the present application, the embodiment provides a hydraulic equipment self-locking tool, which comprises a hydraulic cylinder 1, a hydraulic output shaft 11 arranged on the hydraulic cylinder 1, a protective shell 2 arranged on the hydraulic cylinder 1, a rotating unit 3 arranged on the hydraulic cylinder 1, and a brake ring 4 fixedly arranged on the hydraulic cylinder 1 for cooperating with the rotating unit 3 to brake, wherein the protective shell 2 is used to protect the device, the rotating unit 3 is used to cooperate with the linear extension and retraction movement of the hydraulic output shaft 11 and drive the rotating unit 3 to rotate, and the brake ring 4 is used to brake and lock the hydraulic output shaft 11 by cooperating with the centrifugal force generated by the rotation of the rotating unit 3;

[0028] The rotating unit 3 comprises a rotating ring 31 arranged on the hydraulic cylinder 1 and used to cooperate with the hydraulic output shaft 11, a guide assembly one 32 arranged on the rotating ring 31, a guide assembly two 33 arranged on the rotating ring 31, a connecting assembly one 34 arranged on the rotating ring 31, a connecting assembly two 35 arranged on the rotating ring 31, and a movable ring 36 arranged outside the rotating ring 31 and used to cooperate with the guide assembly one 32, wherein the rotating ring 31 is used to rotate by cooperating with the linear extension and retraction movement of the hydraulic output shaft 11, the guide assembly one 32 and the guide assembly two 33 are used to screen out the movable ring 36 from the brake ring 4 and form the brake for the hydraulic output shaft 11 by cooperating with the centrifugal force generated by the rotation of the rotating ring 31, and the connecting assembly one 34 and the connecting assembly two 35 are used to adapt the position change of the movable ring 36 relative to the rotating ring 31 when the movable ring 36 moves, and at the same time improve the stability of the connection between the rotating ring 31 and the movable ring 36;

[0029] The rotating ring 31 is driven to rotate by the linear movement of the hydraulic output shaft 11, and the movable ring 36 is thrown out by the centrifugal force generated by the rotation to cooperate with the brake ring 4 to brake the hydraulic output shaft 11, lock the current state of the hydraulic output shaft 11, and prevent the hydraulic output shaft 11 from collapsing.

[0030] In summary, when the hydraulic cylinder 1 drives the hydraulic output shaft 11 to rise, at this time the hydraulic output shaft 11 uniformly extends outward at a slow speed, at this time the rotating ring 31 rotates by cooperating with the movement of the hydraulic output shaft 11, at this time the rotating speed of the rotating ring 31 is slow, and the centrifugal force generated is not enough to throw out the movable ring 36, so the hydraulic output shaft 11 can freely extend and retract;

[0031] ​When the hydraulic cylinder 1 fails to drive the hydraulic output shaft 11, the hydraulic output shaft 11 will collapse into the hydraulic cylinder 1 under the action of the load, and the hydraulic output shaft 11 will generate a large instantaneous speed during the collapse. The rapidly moving hydraulic output shaft 11 will drive the rotating ring 31 to rotate rapidly, and the rotating ring 31 will generate a large centrifugal force, which will throw the movable ring 36 outwards through the guide assembly one 32 and the guide assembly two 33 and make it be clamped with the brake ring 4. At this time, the movable ring 36 stops moving, and the rotating ring 31 stops rotating through the guide assembly one 32 and the guide assembly two 33, so that the rotating ring 31 forms a brake locking to the hydraulic output shaft 11, preventing the hydraulic output shaft 11 from continuing to collapse. During this process, the connecting assembly one 34 and the connecting assembly two 35 adjust the length along the movement track of the movable ring 36 to maintain the stability of the connection between the movable ring 36 and the rotating ring 31.

[0032] Embodiment 2, refer to Figure 1 Figure 5 The second embodiment of the present application is different from the previous embodiment in that the specific structure of the brake ring 4 in the hydraulic equipment self-locking tool is provided. Compared with embodiment 1, further, the hydraulic output shaft 11 is provided with a spiral thread 111, and the rotating ring 31 is provided with a spiral block 311 for matching the spiral thread 111. When the hydraulic output shaft 11 moves linearly, the spiral thread 111 drives the spiral block 311 through linear motion, thereby driving the rotating ring 31 to rotate.

[0033] The brake ring 4 includes a fixed ring 41 provided on the hydraulic cylinder 1, a gear ring 42 provided on the fixed ring 41, and a connecting column 43 provided on the fixed ring 41. The fixed ring 41 serves as a fixed function, the gear ring 42 is used to clamp and fix the movable ring 36, and the connecting column 43 is used to install the connecting column 43 on the hydraulic cylinder 1.

[0034] The hydraulic cylinder 1 is provided with a positioning groove 12 matched with the connecting column 43, and the connecting column 43 and the positioning groove 12 are matched to realize the positioning and installation of the brake ring 4.

[0035] The movable ring 36 is provided with a clamping tooth 361 matched with the gear ring 42, which is used to throw the movable ring 36 out when the rotating ring 31 rotates rapidly, so that the clamping tooth 361 is clamped with the gear ring 42, the movable ring 36 is fixed, and the rotating ring 31 is fixed.

[0036] The remaining structures are the same as those of embodiment 1.

[0037] ​In summary, when the hydraulic cylinder 1 normally drives the hydraulic output shaft 11 to perform linear motion, the hydraulic output shaft 11 drives the rotating ring 31 to rotate through the linear motion of the spiral thread 111 and the spiral block 311. The rotating ring 31 then drives the movable ring 36 to rotate through the guide component 1 32 and the guide component 2 33. Since the extension and retraction speed of the hydraulic output shaft 11 is relatively slow under normal driving, the rotation speed of the rotating ring 31 is relatively slow at this time, and the centrifugal force generated is insufficient to throw the movable ring 36 out. Therefore, the movable ring 36 rotates within the ring of the fixed ring 41 along with the rotating ring 31. At this time, the locking teeth 361 do not contact the toothed ring 42.

[0038] When hydraulic cylinder 1 loses driving force to hydraulic output shaft 11 due to a malfunction, hydraulic output shaft 11 will rapidly collapse into hydraulic cylinder 1 under the action of load. At this time, the collapse of hydraulic output shaft 11 will generate a large instantaneous speed, which will drive rotating ring 31 to rotate rapidly through spiral block 311 and spiral pattern 111. At this time, the rapid rotation of rotating ring 31 will generate a large centrifugal force, which will throw movable ring 36 outward through guide component one 32 and guide component two 33 until the locking tooth 361 engages with toothed ring 42. At this time, the state of movable ring 36 is fixed. Through guide component one 32 and guide component two 33, the state of rotating ring 31 is fixed and stops rotating. At this time, rotating ring 31, through the action of spiral block 311 and spiral pattern 111, forms a braking lock on hydraulic output shaft 11, preventing hydraulic output shaft 11 from continuing to collapse.

[0039] Example 3, referring to Figure 1 - Figure 11 This is the second embodiment of the present invention. Unlike the previous embodiment, it provides a specific structure for the rotating unit 3 in the self-locking tool of the hydraulic equipment. Compared to embodiment 2, the guide component 32 further includes a guide block 321 disposed on the movable ring 36, a fixing member 322 disposed on the guide block 321, and a connecting block 323 disposed on the fixing member 322 and fixedly connected to the rotating ring 31. The guide block 321 and the connecting block 323 cooperate to connect and guide. The fixing member 322 is used to cooperate with the mutual sliding of the guide block 321 and the connecting block 323, and to prevent the guide block 321 from sliding back relative to the connecting block 323, so that the thrown movable ring 36 can only move in the direction of the gear ring 42 and cannot move back. The gear ring 42 cooperates to fix the position of the movable ring 36.

[0040] The guide component 32 is located in the middle of the locking tooth 361. With this setting, when the movable ring 36 is thrown out, it is thrown out according to the sliding trajectory of the guide block 321 and the connecting block 323.

[0041] The guide assembly two 33 comprises a guide block two 331 arranged on the movable ring 36, a fixed part two 332 arranged on the guide block two 331, and a connecting block two 333 arranged on the fixed part two 332 and fixedly connected with the rotating ring 31. The guide block two 331 and the connecting block two 333 guide the movement of the movable ring 36. The fixed part two 332 is used for cooperating with the mutual sliding of the guide block two 331 and the connecting block two 333, and preventing the guide block two 331 from moving back.

[0042] The line connecting the guide assembly two 33 and the midpoint of the guide assembly one 32 passes through the center of the rotating ring 31. By such an arrangement, the movable ring 36 is more smoothly thrown out, and the clamping teeth 361 are smoothly clamped with the gear ring 42.

[0043] The connecting assembly one 34 comprises a connecting block three 341 arranged on the movable ring 36 near one side of the clamping teeth 361, a fixed part three 342 arranged on the connecting block three 341, a connecting block four 343 arranged on the fixed part three 342, a rotating block one 344 arranged on the connecting block three 341 and used for rotating on the movable ring 36, and a rotating block two 345 arranged on the connecting block four 343 and used for rotating on the rotating ring 31. The rotating block one 344 and the rotating block two 345 are used for rotating relative to the position change of the rotating ring 31 when the movable ring 36 is thrown out, driving the connecting block three 341 and the fixed part three 342 to slide and deflect at the same time, adapting to the position distance change between the rotating block one 344 and the rotating block two 345, maintaining the stability of the connection between the movable ring 36 and the rotating ring 31. The fixed part three 342 is used for limiting the relative position between the connecting block three 341 and the connecting block four 343, preventing the connecting block four 343 from moving back, and sharing the stress of the guide assembly two 33 and the guide assembly one 32.

[0044] The connecting assembly one 34 is arranged with multiple groups near one side of the clamping teeth 361 of the movable ring 36.

[0045] The connecting assembly two 35 comprises a connecting block five 351 arranged on the movable ring 36 away from the clamping tooth 361, a fixing member four 352 arranged on the connecting block five 351, a connecting block six 353 arranged on the fixing member four 352, a rotating block three 354 arranged on the connecting block five 351 for rotation on the movable ring 36, and a rotating block four 355 arranged on the connecting block six 353 for rotation on the rotating ring 31. The rotating block three 354 and the rotating block four 355 are used to rotate relative to the position change of the rotating ring 31 when the movable ring 36 is thrown out, drive the connecting block five 351 and the fixing member four 352 to slide and deflect at the same time, adapt to the position distance change between the rotating block three 354 and the rotating block four 355, maintain the stability of the connection between the movable ring 36 and the rotating ring 31, and the fixing member four 352 is used to limit the relative position between the connecting block five 351 and the connecting block six 353, prevent the connecting block six 353 from moving back, and share the stress of the guide assembly two 33 and the guide assembly one 32.

[0046] The connecting assembly two 35 is arranged on the side of the movable ring 36 away from the clamping tooth 361 corresponding to the guide assembly two 33, and each group of the connecting assembly two 35 and the line connecting the midpoint of the corresponding guide assembly two 33 passes through the center of the rotating ring 31. Through such arrangement, when the clamping tooth 361 is clamped with the gear ring 42, the rotating ring 31 and the movable ring 36 can keep the interaction force balanced as much as possible, and the stability of the hydraulic output shaft 11 brake is increased.

[0047] The fixing member one 322 comprises a connecting tooth one 3221 fixedly arranged on the connecting block one 323, a connecting tooth two 3222 slidingly arranged on the guide block one 321, a sliding groove 3223 arranged on the guide block one 321 for cooperating with the connecting tooth two 3222 to slide, and a connecting spring 3224 fixedly connected at both ends of the connecting tooth two 3222 and the sliding groove 3223. The connecting tooth one 3221 is used to realize the relative movement between the guide block one 321 and the connecting block one 323 by cooperating with the connecting tooth two 3222, the sliding groove 3223 is used to move back and forth by cooperating with the connecting tooth two 3222, and the connecting spring 3224 is used to drive the connecting tooth two 3222 in the sliding groove 3223 to restore to the original position.

[0048] The connecting tooth one 3221 is provided with an abutting surface one 5 and an inclined surface one 6, and the connecting tooth two 3222 is provided with an inclined surface two 7 and an abutting surface two 8 correspondingly. When the device is in the loosening state, the inclined surface one 6 and the inclined surface two 7 abut. At this time, when the movable ring 36 moves outward, the inclined surface two 7 on the connecting tooth two 3222 and the inclined surface one 6 on the connecting tooth one 3221 are extruded, and the interaction force extrudes the connecting tooth two 3222 into the sliding groove 3223, so that the movable ring 36 cooperates with the centrifugal force to move outward smoothly. When the device is in the locking state, the abutting surface one 5 and the abutting surface two 8 abut. At this time, the gear ring 42 is clamped with the clamping tooth 361, and the unknown state of the movable ring 36 is fixed. At this time, when the gear ring 42 is clamped with the clamping tooth 361, the counterforce generated by the movement of the movable ring 36 extrudes the abutting surface one 5 against the abutting surface two 8, so that the guide block one 321 cannot move back. At this time, the overall state of the guide assembly one 32 is fixed, and the rotating ring 31 stops rotating. Through the action of the spiral block 311 and the spiral thread 111, the hydraulic output shaft 11 is braked and locked.

[0049] The fixed part one 322, the fixed part two 332, the fixed part three 342 and the fixed part four 352 have the same structure. Through such a setting, the interaction force between the movable ring 36 and the rotating ring 31 is dispersed, the pressure on the fixed part one 322 and the fixed part two 332 is reduced, and the stability of the brake on the hydraulic output shaft 11 is enhanced.

[0050] The remaining structures are the same as those of example 2.

[0051] In summary, when the hydraulic cylinder 1 drives the hydraulic output shaft 11 to move linearly normally, at this time, the spiral thread 111 drives the rotating ring 31 to rotate through the spiral block 311. At this time, the rotating ring 31 drives the movable ring 36 to rotate through the guide assembly one 32, the guide assembly two 33, the connecting assembly one 34 and the connecting assembly two 35. Since the rotating speed of the rotating ring 31 is low at this time, the centrifugal force is not enough to throw out the movable ring 36. Therefore, at this time, the clamping tooth 361 does not contact the gear ring 42 when the movable ring 36 rotates. At this time, the hydraulic output shaft 11 cooperates with the hydraulic cylinder 1 to work normally.

[0052] When the hydraulic cylinder 1 fails to drive the hydraulic output shaft 11, the hydraulic output shaft 11 collapses under the load, and the spiral thread 111 drives the rotating ring 31 to rotate rapidly, and the rotating ring 31 generates a large centrifugal force, which tends to throw the movable ring 36 out, and the inclined surface one 6 and the inclined surface two 7 are pressed against each other to drive the connecting tooth two 3222 to retract into the sliding groove 3223, and the movable ring 36 is thrown out along the line connecting the midpoints of the guide assembly two 33 and the guide assembly one 32, and the guide block one 321 slides outwards relative to the connecting block one 323, the guide block two 331 slides inwards relative to the connecting block two 333, the connecting block three 341 slides outwards relative to the connecting block four 343, and the connecting assembly one 34 is adapted to the movement of the movable ring 36, the connecting block five 351 slides inwards relative to the connecting block six 353, and the connecting assembly two 35 is adapted to the movement of the movable ring 36, until the clamping teeth 361 are clamped with the gear ring 42, and the force between the gear ring 42 and the clamping teeth 361 fixes the movable ring 36 and pushes it back, and the abutting surface one 5 and the abutting surface two 8 abut to fix the positions of the guide assembly one 32, the guide assembly two 33, the connecting assembly one 34, and the connecting assembly two 35, so that the rotating ring 31 stops rotating under the action of the movable ring 36, and the movable ring 36 brakes and locks the hydraulic output shaft 11 through the action of the clamping teeth 361 on the spiral thread 111.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A self-locking tool for hydraulic equipment, characterized in that: It includes a hydraulic cylinder (1) and a hydraulic output shaft (11) mounted on the hydraulic cylinder (1), a protective shell (2) mounted on the hydraulic cylinder (1), a rotating unit (3) rotatably mounted on the hydraulic cylinder (1), and a brake ring (4) fixedly mounted on the hydraulic cylinder (1) for braking in conjunction with the rotating unit (3). The rotating unit (3) includes a rotating ring (31) rotatably mounted on the hydraulic cylinder (1) and used to cooperate with the hydraulic output shaft (11), a guide component 1 (32) mounted on the rotating ring (31), a guide component 2 (33) mounted on the rotating ring (31), a connecting component 1 (34) mounted on the rotating ring (31), a connecting component 2 (35) mounted on the rotating ring (31), and a movable ring (36) mounted outside the rotating ring (31) and used to cooperate with the guide component 1 (32). The brake ring (4) includes a fixed ring (41) disposed on the hydraulic cylinder (1), a toothed ring (42) disposed on the fixed ring (41), and a connecting post (43) disposed on the fixed ring (41). The hydraulic cylinder (1) is provided with a positioning groove (12) that matches the connecting column (43); The movable ring (36) is provided with a locking tooth (361) that engages with the toothed ring (42); The connecting component 1 (34) includes a connecting block 3 (341) disposed on the movable ring (36) near the snap-fit ​​tooth (361), a fixing member 3 (342) disposed on the connecting block 3 (341), a connecting block 4 (343) disposed on the fixing member 3 (342), a rotating block 1 (344) disposed on the connecting block 3 (341) for rotating on the movable ring (36), and a rotating block 2 (345) disposed on the connecting block 4 (343) for rotating on the rotating ring (31). 344) and rotating block 2 (345) are used to rotate relative to the position change of rotating ring (31) when the movable ring (36) is thrown out, and drive connecting block 3 (341) and fixing part 3 (342) to slide relative to each other while deflecting to adapt to the change in position distance between rotating block 1 (344) and rotating block 2 (345). Fixing part 3 (342) is used to limit the relative position between connecting block 3 (341) and connecting block 4 (343) to prevent connecting block 4 (343) from moving back. The connecting component 1 (34) has multiple sets on the side of the active ring (36) near the active ring (36); The second connecting component (35) includes a connecting block five (351) disposed on the side of the movable ring (36) away from the snap-fit ​​teeth (361), a fixing member four (352) disposed on the connecting block five (351), a connecting block six (353) disposed on the fixing member four (352), a rotating block three (354) disposed on the connecting block five (351) for rotating on the movable ring (36), and a rotating block four (355) disposed on the connecting block six (353) for rotating on the rotating ring (31). The connecting component 2 (35) is provided with multiple sets on the side of the movable ring (36) away from the snap tooth (361) corresponding to the guide component 2 (33). The line connecting the midpoint of each connecting component 2 (35) and the corresponding guide component 2 (33) passes through the center of the rotating ring (31). The linear motion of the hydraulic output shaft (11) drives the rotating ring (31) to rotate. The rotation generates centrifugal force, which throws out the movable ring (36) to cooperate with the brake ring (4) to brake the hydraulic output shaft (11), lock the current state of the hydraulic output shaft (11), and prevent the hydraulic output shaft (11) from collapsing.

2. The self-locking tool for hydraulic equipment as described in claim 1, characterized in that: The hydraulic output shaft (11) is provided with a spiral pattern (111), and the rotating ring (31) is provided with a spiral block (311) for matching the spiral pattern (111).

3. The self-locking tool for hydraulic equipment as described in claim 2, characterized in that: The guide component 1 (32) includes a guide block 1 (321) disposed on the movable ring (36), a fixing member 1 (322) disposed on the guide block 1 (321), and a connecting block 1 (323) disposed on the fixing member 1 (322) and fixedly connected to the rotating ring (31). The guide component (32) is located in the middle of the locking tooth (361).

4. The self-locking tool for hydraulic equipment as described in claim 3, characterized in that: The guide component 2 (33) includes a guide block 2 (331) disposed on the movable ring (36), a fixing member 2 (332) disposed on the guide block 2 (331), and a connecting block 2 (333) disposed on the fixing member 2 (332) and fixedly connected to the rotating ring (31). The line connecting the midpoints of guide component 2 (33) and guide component 1 (32) passes through the center of the rotation circle (31).

5. The self-locking tool for hydraulic equipment as described in claim 4, characterized in that: The first fixing component (322) includes a first connecting tooth (3221) fixedly disposed on the first connecting block (323), a second connecting tooth (3222) slidably disposed on the first guide block (321), a sliding groove (3223) disposed on the first guide block (321) for sliding with the second connecting tooth (3222), and a connecting spring (3224) fixedly connected at both ends to the second connecting tooth (3222) and the sliding groove (3223) respectively.

6. The self-locking tool for hydraulic equipment as described in claim 5, characterized in that: Connecting tooth 1 (3221) is provided with abutting surface 1 (5) and inclined surface 1 (6), and connecting tooth 2 (3222) is provided with inclined surface 2 (7) and abutting surface 2 (8). When the device is in the loose state, inclined surface 1 (6) and inclined surface 2 (7) abut together. When the device is in the locked state, abutting surface 1 (5) and abutting surface 2 (8) abut together. The structure of fastener one (322) is the same as that of fastener two (332), fastener three (342), and fastener four (352).

Images