Rotary table locking mechanism and crane
By setting up a combination of telescopic cylinder, detection element and induction block on the turntable, the problem that the hydraulic locking mechanism of the large crane rotary table cannot accurately determine the rotation position and direction is solved, and a safe and reliable turntable lock is achieved, which improves operating efficiency and safety.
Patent Information
- Application Number
- CN202422390931.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-09-29
AI Technical Summary
The hydraulic locking mechanism of the rotary table of existing large and ultra-large cranes cannot accurately determine the rotation position and direction, resulting in manual judgment of safety hazards and low operating efficiency, and complex structure.
The combination of telescopic cylinder, the first detection element, the second detection element and the induction block is adopted. Through the coordination of the induction block and the detection element, the alignment judgment of the piston rod and the locking hole is realized, and the locking state is detected through the stroke sensor to ensure the safe locking of the turntable and the frame.
It realizes accurate judgment of the rotating position and direction of the turntable, improves operation safety and efficiency, simplifies the structure, avoids equipment damage, and reduces the difficulty of manual operation.
Smart Images
Figure CN223047141U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cranes, in particular to a turntable locking mechanism and a crane. Background Art
[0002] With the rapid development of infrastructure construction undertakings such as railways, highways, water conservancy and hydropower in China, the demand for cranes is also increasing. Generally speaking, a crane includes a turntable and a chassis. During the working process, the turntable can perform a turning operation on the chassis so as to operate in different working areas; during the driving process, it is necessary to lock the turntable to prevent accidents caused by the left and right rotation of the turntable.
[0003] In the prior art, when locking the turntable of medium and small tonnage cranes, generally a manual locking pin is used to lock the turntable and the chassis. Since the manual locking pin is relatively small, the manual method is relatively easy to operate; however, in the field of large and extra-large cranes, the locking pin is relatively large in volume and heavy in weight, so it is more difficult to perform the locking operation manually. To solve this problem, a turntable hydraulic locking mechanism came into being.
[0004] When the turntable hydraulic locking mechanism performs a locking action, it is necessary to first align the locking pin with the pin hole position. Since the dimensional tolerance between the locking pin and the insertion pin hole is small and the position accuracy requirement is high, precise rotation position detection and control are required. Most of the existing turntable hydraulic locking mechanisms cannot detect the position of the turntable rotation lock. There are safety hazards in simply judging whether the rotation is in place manually, and the operation efficiency is reduced. If the locking action is performed without aligning the pin hole, it may damage the oil cylinder or the vehicle frame. In the prior art, a few turntable hydraulic locking mechanisms can detect the rotation position, but their detection accuracy is low, the structure is relatively complex, and the direction that needs to be rotated cannot be judged. Summary of the Utility Model
[0005] In order to overcome the disadvantages and deficiencies existing in the prior art, the purpose of the utility model is to provide a turntable locking mechanism and a crane to solve the problem that the turntable hydraulic locking mechanism in the prior art cannot judge the rotation direction.
[0006] The purpose of the utility model is achieved by the following technical solutions:
[0007] The utility model provides a turntable locking mechanism, which includes a telescopic oil cylinder, a locking hole, a first detection element, a second detection element and an induction block. The telescopic oil cylinder, the first detection element and the second detection element are all arranged on the turntable. The locking hole and the induction block are both arranged on the vehicle frame. The piston rod of the telescopic oil cylinder is matched with the locking hole and is used to control the locking state of the turntable and the vehicle frame. The first detection element and the second detection element are both matched with the same induction block, and the distance between the two ends of the induction block is equal to the distance between the first detection element and the second detection element;
[0008] When the piston rod is aligned with the locking hole, one end of the first detection element is aligned with one end of the induction block, and the other end of the second detection element is aligned with the other end of the induction block.
[0009] Furthermore, the turntable locking mechanism includes a mounting sleeve, which is mounted on the turntable and corresponds to the piston rod. The first detection element and the second detection element are both mounted on the mounting sleeve.
[0010] Furthermore, the mounting sleeve is provided with a first mounting plate and a second mounting plate. The first detection element is mounted on the mounting sleeve through the first mounting plate, and the second detection element is mounted on the mounting sleeve through the second mounting plate.
[0011] Furthermore, the positions of the first detection element and the second detection element on the mounting sleeve are symmetric with respect to the connection line between the axis of the piston rod and the rotation center of the turntable.
[0012] Furthermore, the central angle between the connection line of the first detection element and the axis of the piston rod and the connection line of the second detection element and the axis of the piston rod is an obtuse angle.
[0013] Furthermore, the first detection element and the second detection element are both located on the same circle with the rotation center of the turntable as the center; the induction block is in an arc-shaped structure, and the center of the arc-shaped structure is the rotation center of the turntable.
[0014] Furthermore, the arc length between the first detection element and the second detection element is equal to the arc length of the induction block.
[0015] Furthermore, the turntable locking mechanism includes a third detection element, which is used to detect whether the piston rod is inserted into the locking hole.
[0016] Furthermore, the third detection element is a stroke sensor, and the stroke sensor is used to detect the telescopic distance of the piston rod.
[0017] A crane of the present application includes the turntable locking mechanism as described above.
[0018] The beneficial effects of the present utility model are as follows: By arranging a telescopic oil cylinder, a first detection element and a second detection element on the turntable, and arranging a locking hole and an induction block on the vehicle frame, the piston rod of the telescopic oil cylinder is matched with the locking hole, and the locking state of the turntable and the vehicle frame can be controlled; moreover, by the cooperation of the first detection element and the second detection element with the same induction block, it is not only possible to judge whether the piston rod is aligned with the locking hole, but also to judge in which direction the turntable should be rotated during fine adjustment to make the piston rod aligned with the locking hole. Description of the Drawings
[0019] Figure 1 is a schematic structural diagram of the crane in the present utility model;
[0020] Figure 2 is Figure 1 an enlarged structural diagram of the partial section of the turntable locking mechanism at position A in
[0021] Figure 3 is one of the schematic plan views of the crane in the present utility model during fine adjustment;
[0022] Figure 4 is another schematic plan view of the crane in the present utility model during fine adjustment;
[0023] Figure 5 is a schematic plan view of the crane in the present utility model when the adjustment is completed;
[0024] Figure 6 is the third schematic plan view of the crane in the present utility model during fine adjustment.
[0025] In the figure: turntable locking mechanism 10, locking hole 101, telescopic oil cylinder 11, piston rod 111, first detection element 121, second detection element 122, induction block 13, mounting sleeve 14, first mounting plate 141, second mounting plate 142, third detection element 15, turntable 20, vehicle frame 30, rotating bearing 40. Detailed Embodiment
[0026] To further elaborate on the technical means and effects adopted by the present utility model to achieve the intended utility model purpose, the following, in conjunction with the drawings and preferred embodiments, details the specific embodiments, structures, features and effects of the turntable locking mechanism and the crane proposed according to the present utility model are described in detail as follows:
[0027] Figure 1 is a schematic structural diagram of the crane in the present utility model. Figure 2 is Figure 1The enlarged structural schematic diagram of the partial section of the turntable locking mechanism at position A in the middle.
[0028] As Figure 1 and Figure 2 shown, a turntable locking mechanism 10 provided by the present utility model includes a telescopic oil cylinder 11, a locking hole 101, a first detection element 121, a second detection element 122, and an induction block 13. The telescopic oil cylinder 11, the first detection element 121, and the second detection element 122 are all arranged on the turntable 20, and the locking hole 101 and the induction block 13 are both arranged on the vehicle frame 30. The piston rod 111 of the telescopic oil cylinder 11 is matched with the locking hole 101 and is used to control the locking state of the turntable 20 and the vehicle frame 30. The first detection element 121 and the second detection element 122 are both matched with the same induction block 13, and the distance between the two ends of the induction block 13 is equal to the distance between the first detection element 121 and the second detection element 122. When the piston rod 111 and the locking hole 101 are aligned with each other, one end of the first detection element 121 is aligned with the induction block 13 and can sense a signal, and the other end of the second detection element 122 is aligned with the induction block 13 and can sense a signal. Among them, when the piston rod 111 and the locking hole 101 are aligned with each other, the piston rod 111 of the telescopic oil cylinder 11 is inserted into the locking hole 101, then the turntable 20 and the vehicle frame 30 are in a locked state to prevent rotation between the turntable 20 and the vehicle frame 30; when the piston rod 111 of the telescopic oil cylinder 11 is withdrawn from the locking hole 101, the turntable 20 and the vehicle frame 30 are in an unlocked state, and the turntable 20 and the vehicle frame 30 can rotate relative to each other. When the first detection element 121 and the second detection element 122 are respectively aligned with the two ends of the induction block 13, it is determined that the piston rod 111 and the locking hole 101 are aligned with each other; when at least one of the first detection element 121 and the second detection element 122 is not corresponding to the induction block 13, it is determined that the piston rod 111 and the locking hole 101 are not aligned. The first detection element 121 and the second detection element 122 are both proximity switches. When the induction block 13 is directly opposite to the proximity switch, the proximity switch will detect the corresponding signal, and the processor will judge whether the proximity switch is directly opposite to the induction block 13 according to the signal.
[0029] In this embodiment, the turntable locking mechanism 10 includes a mounting sleeve 14 which is mounted on the turntable 20 and corresponds to the piston rod 111. One end of the piston rod 111 can pass through the mounting sleeve 14, and both the first detection element 121 and the second detection element 122 are mounted on the mounting sleeve 14. By providing the mounting sleeve 14 corresponding to the position of the telescopic oil cylinder 11 and mounting both the first detection element 121 and the second detection element 122 on the mounting sleeve 14, the structure of the turntable locking mechanism 10 can be made more compact. Of course, in other embodiments, the first detection element 121 and the second detection element 122 can also be mounted at other positions on the turntable 20, but the position of the induction block 13 also needs to be adjusted correspondingly.
[0030] Furthermore, the mounting sleeve 14 is provided with a first mounting plate 141 and a second mounting plate 142. The first detection element 121 is mounted on the mounting sleeve 14 through the first mounting plate 141, and the second detection element 122 is mounted on the mounting sleeve 14 through the second mounting plate 142. Wherein, the first mounting plate 141 and the second mounting plate 142 are U-shaped structures and form an accommodating cavity with the outer wall of the mounting sleeve 14. The main parts of the first detection element 121 and the second detection element 122 are both located in the accommodating cavity, and only the probes of the first detection element 121 and the second detection element 122 need to be exposed, so that the first detection element 121 and the second detection element 122 can be protected by the first mounting plate 141 and the second mounting plate 142 to avoid damage to the first detection element 121 and the second detection element 122.
[0031] In this embodiment, the positions of the first detection element 121 and the second detection element 122 on the mounting sleeve 14 are symmetrical with respect to the connection line between the axis of the piston rod 111 and the rotation center of the turntable 20. The connection line between the axis of the piston rod 111 and the rotation center of the turntable 20 is the first connection line, and the positions of the first detection element 121 and the second detection element 122 on the mounting sleeve 14 are symmetrical with respect to the first connection line.
[0032] Furthermore, the central angle between the connection line of the first detection element 121 and the axis of the piston rod 111 and the connection line of the second detection element 122 and the axis of the piston rod 111 is an obtuse angle. The connection line of the first detection element 121 and the axis of the piston rod 111 is the second connection line, and the connection line of the second detection element 122 and the axis of the piston rod 111 is the third connection line. The angle between the second connection line and the third connection line is an obtuse angle, so that there is a certain distance between the first detection element 121 and the second detection element 122, facilitating the installation of the third detection element 15 between the first detection element 121 and the second detection element 122.
[0033] Further, both the first detection element 121 and the second detection element 122 are located on the same circle with the rotation center of the turntable 20 as the center of the circle; the induction block 13 is in an arc structure, and the center of the arc structure is the rotation center of the turntable 20. Since both the first detection element 121 and the second detection element 122 rotate together with the turntable 20, their movement trajectories are arc-shaped. Making the induction block 13 in an arc structure facilitates the first detection element 121 and the second detection element 122 to better detect the induction block 13. Of course, since the distance between the first detection element 121 and the second detection element 122 is small, the induction block 13 can also be set as a rectangular structure.
[0034] Optionally, the arc length between the first detection element 121 and the second detection element 122 is equal to the arc length of the induction block 13. Thus, when the piston rod 111 is aligned with the locking hole 101, the first detection element 121 is aligned with one end of the induction block 13, and the second detection element 122 is aligned with the other end of the induction block 13.
[0035] In this embodiment, the turntable locking mechanism 10 includes a third detection element 15. The third detection element 15 is installed on the mounting sleeve 14 and is located between the first detection element 121 and the second detection element 122. The third detection element 15 is used to detect whether the piston rod 111 is inserted into the locking hole 101, that is, to judge whether the turntable 20 and the vehicle frame 30 are in a locked state, so as to avoid damage to the telescopic oil cylinder 11 or the vehicle frame 30 caused by rotating the turntable 20 when the turntable 20 and the vehicle frame 30 are in a locked state. Optionally, the third detection element 15 is a stroke sensor, and the stroke sensor is used to detect the telescopic distance of the piston rod 111 to judge whether the turntable 20 and the vehicle frame 30 are in a locked state.
[0036] This application also provides a crane, which includes a turntable 20, a slewing bearing 40, a vehicle frame 30, and the turntable locking mechanism 10 as described above. The turntable 20 and the vehicle frame 30 are rotatably connected, and the slewing bearing 40 is arranged between the turntable 20 and the vehicle frame 30 to reduce the resistance when the turntable 20 and the vehicle frame 30 rotate. Among them, the telescopic oil cylinder 11, the first detection element 121, and the second detection element 122 are all arranged on the turntable 20 and rotate together with the turntable 20, and the locking hole 101 and the induction block 13 are both arranged on the vehicle frame 30.
[0037] As Figure 3 shown, during the slewing process of the turntable 20, at this time, neither the first detection element 121 nor the second detection element 122 can sense a signal, indicating that the piston rod 111 is not aligned with the locking hole 101, and the telescopic oil cylinder 11 does not act. The turntable 20 needs to continue to slewing in the direction of the arrow; as Figure 4As shown, at this time, the first detection element 121 cannot sense the signal, and the second detection element 122 starts to sense the signal, indicating that the piston rod 111 is not aligned with the locking hole 101. The telescopic cylinder 11 does not act, and the turntable 20 needs to rotate counterclockwise (in the direction of the arrow shown in the figure); as Figure 5 shown, at this time, both the first detection element 121 and the second detection element 122 sense the signal, indicating that the piston rod 111 is aligned with the locking hole 101. The telescopic cylinder 11 drives the piston rod 111 to extend and insert into the locking hole 101 to lock the turntable 20 and the vehicle frame 30; as Figure 6 shown, at this time, the first detection element 121 senses the signal, and the second detection element 122 cannot sense the signal, indicating that the piston rod 111 is not aligned with the locking hole 101. The telescopic cylinder 11 does not act, and the turntable 20 needs to rotate clockwise (in the direction of the arrow shown in the figure).
[0038] When the turntable 20 rotates, it is set that when the detection element has a signal, it is "1", and when there is no signal, it is "0". When the signals of both the first detection element 121 and the second detection element 122 are "0", the system records the signal as "0-0" at this time, and the telescopic cylinder 11 cannot perform the locking action; when the signal of the first detection element 121 is "0" and the signal of the second detection element 122 is "1", the system records the signal as "0-1" at this time, and the telescopic cylinder 11 cannot perform the locking action, and it can be judged that the direction in which the turntable 20 needs to rotate is counterclockwise; when the signals of both the first detection element 121 and the second detection element 122 are "1", the system records the signal as "1-1" at this time, and the telescopic cylinder 11 can perform the locking action; when the signal of the first detection element 121 is "1" and the signal of the second detection element 122 is "0", the system records the signal as "1-0" at this time, and the telescopic cylinder 11 cannot perform the locking action, and it can be judged that the direction in which the turntable 20 needs to rotate is clockwise. During this rotation process, the signal states are generally: "0-0" → "0-1" → "1-1" → "1-0" → "0-0" or "0-0" → "1-0" → "1-1" → "0-1" → "0-0". When the detection switch is in the two intermediate states of "0-1" and "1-0", the rotation direction required for rotary locking can be judged respectively, which is convenient for correcting and aligning the position of the locking hole. Among them, when the signal state is "0-0", the distance between the piston rod 111 and the locking hole 101 is relatively large at this time. Generally, the driver can judge in which direction to rotate through experience; when the piston rod 111 is relatively close to the locking hole 101, that is, when one of the detection elements senses the signal, the signals of the first detection element 121 and the second detection element 122 can be used to judge in which direction to perform fine adjustment, which is safer and more reliable.
[0039] In this text, the orientation terms such as up, down, left, right, front, and back are defined based on the positions of the structures in the attached drawings and their relative positions to each other, solely for the clarity and convenience of expressing the technical solution. It should be understood that the use of these orientation terms should not limit the scope of protection claimed in this application. It should also be understood that the terms "first" and "second" used in this text are only for differentiating names and do not limit the quantity and order.
[0040] The above are only the preferred embodiments of the present utility model and do not impose any formal limitations on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the relevant art can make some changes or modifications within the scope of the technical solution of the present utility model by using the disclosed technical content, which are equivalent embodiments of equivalent changes. However, as long as the content of the technical solution of the present utility model is not departed from, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model still fall within the scope of protection of the technical solution of the present utility model.
Claims
1. A turntable locking mechanism, characterized in that: The invention comprises a telescopic oil cylinder (11), a locking hole (101), a first detection element (121), a second detection element (122) and a sensing block (13); the telescopic oil cylinder (11), the first detection element (121) and the second detection element (122) are all arranged on a turntable (20); the locking hole (101) and the sensing block (13) are all arranged on a vehicle frame (30); a piston rod (111) of the telescopic oil cylinder (11) cooperates with the locking hole (101) and is used to control the locking state of the turntable (20) and the vehicle frame (30); the first detection element (121) and the second detection element (122) are all matched with the same sensing block (13); and the distance between the two ends of the sensing block (13) is equal to the distance between the first detection element (121) and the second detection element (122); When the piston rod (111) and the locking hole (101) are aligned with each other, the first detection element (121) is aligned with one end of the sensing block (13), and the second detection element (122) is aligned with the other end of the sensing block (13).
2. The turntable locking mechanism according to claim 1, characterized in that: The turntable locking mechanism (10) comprises a mounting sleeve (14), the mounting sleeve (14) being mounted on the turntable (20) and corresponding to the piston rod (111), and the first detection element (121) and the second detection element (122) being both mounted on the mounting sleeve (14).
3. The turntable locking mechanism according to claim 2, characterized in that: The mounting sleeve (14) is provided with a first mounting plate (141) and a second mounting plate (142); the first detection element (121) is mounted on the mounting sleeve (14) via the first mounting plate (141); and the second detection element (122) is mounted on the mounting sleeve (14) via the second mounting plate (142).
4. The turntable locking mechanism according to claim 2, characterized in that: The positions of the first detection element (121) and the second detection element (122) on the mounting sleeve (14) are symmetrical with respect to a line connecting the axis of the piston rod (111) and the rotation center of the turntable (20).
5. The turntable locking mechanism according to claim 2, characterized in that: The central angle between a line connecting the axis of the first detection element (121) and the piston rod (111) and a line connecting the axis of the second detection element (122) and the piston rod (111) is an obtuse angle.
6. The turntable locking mechanism according to claim 1, characterized in that: The first detection element (121) and the second detection element (122) are both located on the same circle with the rotation center of the turntable (20) as the center; the sensing block (13) is an arc-shaped structure, and the center of the arc-shaped structure is the rotation center of the turntable (20).
7. The turntable locking mechanism according to claim 6, characterized in that: The arc length between the first detection element (121) and the second detection element (122) is equal to the arc length of the sensing block (13).
8. The turntable locking mechanism according to claim 1, characterized in that: The turntable locking mechanism (10) comprises a third detection element (15), and the third detection element (15) is used to detect whether the piston rod (111) is inserted into the locking hole (101).
9. The turntable locking mechanism according to claim 8, characterized in that: The third detection element (15) is a stroke sensor, and the stroke sensor is used to detect the extension and retraction distance of the piston rod (111).
10. A crane, characterized in that: It comprises a turntable locking mechanism (10) as claimed in any one of claims 1 to 9.