Rotary table self-locking device
By using a limit rack to mesh with the ring gear on the turntable and using a fixed seat to block linear motion, the problems of low accuracy and large volume of the existing turntable self-locking device are solved, and the self-locking function with high precision and compact structure is achieved.
Patent Information
- Application Number
- CN202421698810.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-17
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-07-17
AI Technical Summary
The existing turntable self-locking device has low accuracy when achieving precise motion locking, and is large in size and weight, making it difficult to meet the needs of high-precision and compact structure.
The limit rack moving along the diameter of the rotary body of the rotary table is meshed with the ring gear, and the rotational movement is converted into a linear movement, and the fixed seat blocks the linear movement to achieve self-locking.
It realizes high-precision self-locking function, reduces the volume and weight of parts, has a more compact structure, and improves the safety and locking accuracy of the turntable.
Smart Images
Figure CN222864547U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of turntables, in particular to a turntable self-locking device. Background Art
[0002] The statements in this section merely provide background technical information related to the present invention and do not necessarily constitute prior art.
[0003] The turntable is a rotating structure that carries different equipment. Depending on the equipment, the requirements for the turntable are also different. For example, when the turntable is directly driven by a torque motor, it can achieve relatively higher motion accuracy, but the torque motor has no self-locking ability, which causes the load to fall or shake during the rotation of this type of turntable due to abnormal power failure, which can easily cause equipment damage or personal injury.
[0004] In response to the above problems, the current turntable self-locking is generally achieved through a worm gear device, but the worm gear device has low precision and it is difficult to achieve precise motion locking at a set locking angle. In addition, the worm gear device itself is large in size and weight, and is often installed in the turntable as an external part, which increases the overall size and weight of the turntable. Utility Model Content
[0005] In order to solve the technical problems existing in the above-mentioned background technology, the utility model provides a turntable self-locking device, which utilizes a limiting rack that moves along the diameter direction of the turntable rotating body, engages with the ring gear when approaching the center of the turntable rotating body, and converts the rotational motion tendency of the turntable rotating body together with the ring gear into the linear motion tendency of the rack, and utilizes the fixed seat to block the linear motion tendency, thereby realizing self-locking.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] The utility model provides a turntable self-locking device, comprising a gear ring connected to a turntable rotating body, and a fixed seat connected to a turntable fixed body, wherein a movably connected limit rack is arranged inside the fixed seat, and the limit rack moves in a direction away from the gear ring under the drive of a driving electromagnet, and moves in a direction close to the gear ring under the drive of a reset spring.
[0008] Furthermore, the driving electromagnet is connected to the fixing seat, and the action end of the driving electromagnet is connected to the limiting rack.
[0009] Furthermore, the action end of the driving electromagnet is connected to the tail of the limit rack through an adapter.
[0010] Furthermore, when the head of the limiting rack is close to the gear ring, it meshes with the gear ring.
[0011] Furthermore, the limit rack moves along the diameter direction of the turntable rotating body under the drive of the driving electromagnet and the return spring.
[0012] Furthermore, the gear ring is coaxially arranged with the rotating body of the turntable and rotates synchronously with the rotating body.
[0013] Furthermore, the fixing seat is connected to the fixing body of the turntable, and the fixing seat is located outside the circumference of the gear ring.
[0014] Furthermore, a space is provided inside the fixing seat to accommodate the movement of the limiting rack.
[0015] Furthermore, a guide piece is provided inside the fixing seat for guiding the limiting rack to move along the diameter direction of the rotating body of the turntable.
[0016] Further, the return spring is located on the driving electromagnet.
[0017] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects:
[0018] 1. Use the limit rack that moves along the diameter direction of the turntable rotating body to mesh with the gear ring when approaching the center of the turntable rotating body, convert the rotational motion tendency of the turntable rotating body and the gear ring into the linear motion tendency of the rack, and use the fixed seat to block the linear motion tendency, thereby achieving self-locking.
[0019] 2. The additional gear ring on the turntable will occupy relatively less volume and obtain relatively greater locking ability. Since the rack is a linear part with a relatively larger meshing area, it is different from the traditional worm gear structure. It does not rely on the meshing area of the rack and the gear ring to generate the resistance required for self-locking, but achieves self-locking through the blocking effect of the fixed seat on the linear motion of the rack. In the traditional structure, the self-locking ability of the parts when meshing comes from friction, which requires a relatively larger contact area and a larger volume of self-locking structure. This is the case with the worm gear structure. The present solution directly uses the fixed seat to block the linear motion tendency that may be generated by the rack after meshing with the gear ring to achieve self-locking, thereby achieving relatively greater self-locking ability. At the same time, it does not require an excessively large part volume, so the structure is more compact.
[0020] 3. When the turntable and the gear ring rotate past the set angle and need to stop, the driving electromagnet is powered off, and the self-locking is achieved under the action of the reset spring. The minimum angle resolution that can be determined is related to the number of teeth on the gear ring and the rack. A relatively higher precision self-locking position can be obtained based on the difference in the number of teeth on the gear ring and the rack. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.
[0022] Figure 1 It is a schematic diagram of the overall structure of the turntable self-locking device provided by the utility model;
[0023] Figure 2 This is a schematic diagram of the locking state structure of the turntable self-locking device provided by the utility model:
[0024] Figure 3 This is a schematic diagram of the unlocked state structure of the turntable self-locking device provided by the utility model:
[0025] Figure 4 This is a three-dimensional structural diagram of the turntable self-locking device provided by the utility model:
[0026] Figure 5 The utility model is a schematic diagram of the cross-sectional structure of the turntable self-locking device.
[0027] In the figure: 1-limiting rack, 2-driving electromagnet, 3-locking member, 4-adapter, 5-fixed seat, 6-limiting rack, 7-turntable, 8-self-locking device. DETAILED DESCRIPTION
[0028] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0029] It should be noted that the following detailed descriptions are exemplary and are intended to provide further description of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.
[0030] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0031] As introduced in the background technology, the torque motor is used as a high-precision state for direct drive. Since the torque motor lacks self-locking ability, this type of turntable may cause the load to fall or shake due to abnormal power failure during rotation, which may easily cause equipment damage or personal injury. The turntable self-locking in the prior art is generally achieved through a worm gear device, which has low precision, large size and weight.
[0032] Therefore, the following embodiment provides a turntable self-locking device, which adopts mechanical structure for self-locking and has large self-locking torque, which can greatly improve the safety of the turntable; it has a simple structure, low use cost, and is more compatible with the direct-drive turntable, making up for the defect of safety hazards caused by abnormal power failure; it has an intelligent design, and the turntable can self-lock when the power is off, without the need for other manual operations.
[0033] In this embodiment, Figure 1-Figure 3 As shown, the turntable 7 includes a rotating body and a fixed body, and a self-locking device 8 is connected to the fixed body. The self-locking device 8 includes a limit rack 6 connected to the driving electromagnet 2. A gear ring is provided on the rotating body. The self-locking device 8 is located in the circumferential direction of the rotating body. Through the action of the driving electromagnet 2, the limit rack 6 is driven to move toward or away from the gear ring. When approaching the gear ring, the limit rack 6 is meshed with the gear ring, so that the gear ring and the rotating body are locked and stop rotating; when away from the gear ring, the meshing state of the gear ring and the limit rack 6 is released, and the locking state of the rotating body is released.
[0034] In this embodiment, the specific structure of the self-locking device 8 is as follows: Figure 4-Figure 5 As shown, it includes a limit rack 1 arranged in the horizontal direction, the limit rack 1 is connected to the driving electromagnet 2 through an adapter 4, the fixed seat 5 is connected to the fixed body of the turntable and accommodates the limit rack 1, the driving electromagnet 2 is connected to the fixed seat 5, the action end of the driving electromagnet 2 is connected to the limit rack 1 through the adapter 4, and the fixed seat 5 is provided with a locking member 3 for connecting the driving electromagnet 2.
[0035] The relative positions of the driving electromagnet 2 and the fixing seat 5 are not limited. For example, in this embodiment, the driving electromagnet 2 is connected to the upper surface of the fixing seat 5 .
[0036] A reset spring is provided on the driving electromagnet 2, which is used to push the action end when the power is off, so that the limit rack 1 is close to the gear ring until the limit rack 1 is meshed with the gear ring. In this embodiment, the reset spring is not drawn. When the turntable and the gear ring have a tendency to rotate, the limit rack 1 is driven to move linearly, and the fixed seat 5 will block the linear movement of the limit rack 1, thereby realizing self-locking when the power is off.
[0037] When the driving electromagnet 2 is energized, the internal coil generates a magnetic field, so that the action end drives the adapter 4 together with the limit rack 1 to move in a direction away from the gear ring, thereby achieving unlocking.
[0038] The driving electromagnet 2 is a mature product of the prior art. It generates a magnetic field by energizing the coil to attract parts. After the power is cut off and the magnetic field is lost, the parts are reset under the push of the reset spring. The specific shape, structure, etc. are not described in detail in this embodiment.
[0039] A space is provided inside the fixing seat 5 to accommodate the movement of the limiting rack 1, and is used to limit the movement direction of the limiting rack 1 so that it can only move along the diameter direction of the turntable rotating body.
[0040] A guide member may also be provided inside the fixing seat 5 to guide the limiting rack 1 to move along the diameter direction of the turntable rotating body, which also plays a certain limiting role.
[0041] The above structure uses an electromagnet to drive the rack and cooperate with the gear ring to achieve self-locking. The overall volume and weight are more compact than the traditional worm gear structure, with small size and light weight.
[0042] The additional ring gear on the turntable will occupy relatively less volume and obtain relatively greater locking ability. The rack is a linear part with a relatively larger meshing area. Unlike the traditional worm gear structure, this embodiment does not rely on the meshing area of the rack and the ring gear to generate the resistance required for self-locking, but achieves self-locking through the blocking effect of the fixed seat on the linear motion of the rack. The self-locking ability of the parts when meshing comes from friction, which requires a relatively larger contact area and a larger volume of self-locking structure. The structure in which the worm gear structure and the gear rack are directly meshed is just like this. This embodiment does not use friction, but directly uses the fixed seat to block the linear motion tendency that may be generated by the rack after meshing with the ring gear to achieve self-locking. Therefore, a relatively greater self-locking ability can be obtained, and at the same time, an excessively large part volume is not required, so the structure is more compact.
[0043] When the turntable and the gear ring rotate to a set angle and need to stop, the minimum angle resolution that can be determined by the power-off self-locking is related to the number of teeth on the gear ring. Based on the difference in the number of teeth on the gear ring and the rack, a relatively higher precision self-locking position can be obtained.
[0044] Furthermore, a self-locking position with higher precision can be obtained by utilizing the clearance between the fixing seat and the limiting rack.
[0045] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A turntable self-locking device, characterized in that: It includes a gear ring connected to the turntable rotating body and a fixed seat connected to the turntable fixed body. A movably connected limit rack is provided inside the fixed seat. The limit rack moves in a direction away from the gear ring under the drive of the driving electromagnet, and moves in a direction close to the gear ring under the drive of the reset spring.
2. A turntable self-locking device as claimed in claim 1, characterized in that: The driving electromagnet is connected to the fixing seat, and the action end of the driving electromagnet is connected to the limiting rack.
3. A turntable self-locking device as claimed in claim 2, characterized in that: The action end of the driving electromagnet is connected to the tail of the limiting rack through an adapter.
4. A turntable self-locking device as claimed in claim 1, characterized in that: The head of the position-limiting rack meshes with the gear ring when it is close to the gear ring.
5. A turntable self-locking device as claimed in claim 1, characterized in that: The limit rack moves along the diameter direction of the turntable rotating body under the drive of the driving electromagnet and the return spring.
6. A turntable self-locking device as claimed in claim 1, characterized in that: The gear ring is coaxially arranged with the rotating body of the turntable and rotates synchronously with the rotating body.
7. A turntable self-locking device as claimed in claim 1, characterized in that: The fixing seat is connected to the fixing body of the turntable, and the fixing seat is located outside the circumference of the gear ring.
8. A turntable self-locking device as claimed in claim 1, characterized in that: The fixing seat is provided with a space inside to accommodate the movement of the limiting rack.
9. A turntable self-locking device as claimed in claim 1, characterized in that: A guide piece is provided inside the fixing seat for guiding the limiting rack to move along the diameter direction of the turntable rotating body.
10. A turntable self-locking device according to claim 1, characterized in that: The return spring is located on the driving electromagnet.