Centrifugal safety coupling
By designing a centrifugal safety coupling, and utilizing a combination of a return spring and a protection motor, the problems of automatic disengagement lag and meshing impact wear in existing couplings when transmitting torque are solved. This achieves automatic meshing and multi-level protection, reducing maintenance costs.
Patent Information
- Application Number
- CN202520232620.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-13
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2035-02-13
AI Technical Summary
Existing couplings lack an automatic disengagement mechanism when transmitting torque, leading to equipment damage. They also suffer from problems such as high frictional loss, poor reset accuracy, complex structure, and high maintenance costs.
A centrifugal safety coupling was designed, which utilizes a combination of a return spring and a protection motor to achieve automatic engagement and disengagement through centrifugal force and spring preload. Combined with a multi-level protection mechanism, it ensures that the toothed plate is forcibly disengaged in emergency situations, reducing engagement impact wear, and supports individual replacement of the sliding toothed block to reduce maintenance costs.
It achieves automatic engagement and disengagement triggered at a speed threshold, providing double protection, reducing engagement impact wear, simplifying the maintenance process, and reducing maintenance costs.
Smart Images
Figure CN223648363U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of couplings, and more specifically, to a centrifugal safety coupling. Background Technology
[0002] Traditional couplings (such as rigid couplings and gear couplings) lack an automatic disengagement mechanism when transmitting torque, which can easily lead to drive damage when the equipment continues to rotate due to inertia or experiences overload. Among existing improvements, centrifugal clutches rely on rotational speed to trigger friction plate engagement, but suffer from high frictional losses and poor reset accuracy; electromagnetic clutches require external power and have complex structures, making them unsuitable for harsh operating conditions; shear pin couplings can protect the equipment when the shear pin breaks under overload, but manual replacement of the pin is required, resulting in high maintenance costs. Furthermore, existing gear clutch structures are prone to impact wear due to misaligned teeth during high-speed engagement and lack multi-stage protection mechanisms. Utility Model Content
[0003] The purpose of this invention is to provide a centrifugal safety coupling that solves the problems of existing couplings, such as lag in dynamic disengagement, large meshing impact wear, risk of failure of a single protection mechanism, and inconvenience in maintenance.
[0004] The embodiments of this utility model are achieved through the following technical solutions:
[0005] A centrifugal safety coupling, comprising:
[0006] The male half-coupling includes a male bushing and a male connector; one side of the male connector is connected to the male bushing, and the other side is provided with a mounting seat; the mounting seat has several radially evenly distributed guide sleeves on the circumference; a sliding tooth block is slidably provided in the guide sleeve; one end of the sliding tooth block is connected to the mounting seat through a reset elastic element, and the other end is provided with a tooth plate;
[0007] The half-coupling female head includes a female head bushing and a female head connecting seat; one side of the female head connecting seat is connected to the female head bushing, and the other side is provided with an internal gear ring that meshes with the gear plate.
[0008] The sliding tooth block includes a sliding rod and a toothed plate; the sliding rod is slidably disposed in the guide sleeve; the toothed plate is disposed on the sliding rod at one end away from the guide sleeve.
[0009] The reset elastic element is a reset spring.
[0010] The sliding rod has a shoulder at one end away from the toothed plate; a retaining ring extends inward from the opening of one end of the guide sleeve; the return spring is arranged around the sliding rod, with one end connected to the shoulder and the other end connected to the retaining ring.
[0011] The guide sleeve has a guide rib at its opening; the sliding rod has a guide groove on its side that cooperates with the guide rib.
[0012] The mounting base also includes a cavity, a protective motor, connecting ropes, a power supply, and a controller. The cavity is located at the center of the mounting base. Through holes are provided on the sidewalls of the cavity corresponding to several guide sleeves. The protective motor is located within the cavity, and several connecting ropes are circumferentially distributed along its shaft, each corresponding to one of the guide sleeves. One end of each connecting rope passes through a through hole and is connected to a sliding tooth block. The controller is located inside the mounting base and is electrically connected to the protective motor. A power supply is also provided on one side of the mounting base and is electrically connected to the protective motor.
[0013] The mounting base has a battery slot on one side for installing a power source.
[0014] The teeth of the internal gear ring are provided with guide chamfers; the teeth of the gear plate are also provided with guide chamfers that cooperate with the guide chamfers.
[0015] The technical solution of this utility model embodiment has at least the following advantages and beneficial effects:
[0016] 1. The present invention relates to a centrifugal safety coupling, which is provided with a sliding tooth block connected by a return spring. By dynamically balancing the centrifugal force and the spring preload, the coupling can be triggered when a preset speed threshold is reached. The elastic deformation that the return spring can generate in the radial direction allows the coupling to be used to compensate for radial offset between two shafts. Furthermore, the coupling is driven by tooth meshing and can be used to compensate for axial offset between two shafts by using a certain tooth width.
[0017] 2. The centrifugal safety coupling of this utility model is also equipped with multi-level protection. First, at low speed, the preload of the return spring is used to set the speed threshold for disengagement, so that the drive shaft and the driven shaft can be disengaged under the condition. It is also equipped with a protection motor. In an emergency, the protection motor can be controlled to rotate and drive the sliding tooth block to retract, thereby forcibly disengaging the tooth plate from the inner tooth ring, thus protecting the coupling and the driver and providing double insurance.
[0018] 3. The centrifugal safety coupling of this utility model also adopts a low-impact meshing design. By cooperating with the guide chamfer of one end of the sliding tooth block and the guide chamfer of the internal gear ring, the tooth profile is automatically aligned and meshed during high-speed rotation, which reduces the collision caused by misalignment during meshing and the impact wear during meshing. Multiple sliding tooth blocks are independently slidably set in the guide sleeve, and can be replaced individually during maintenance, thereby reducing maintenance costs. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0020] Figure 2 This is a schematic diagram of the split structure of this utility model;
[0021] Figure 3 It is attached Figure 1 Sectional view at point aa;
[0022] Figure 4 It is attached Figure 3 Enlarged view of point A in the middle;
[0023] Figure 5 It is attached Figure 1 Sectional view at point bb.
[0024] In the diagram, 1-male half-coupling, 101-male head bushing, 102-male head connecting seat, 103-mounting seat, 1031-guide sleeve, 1032-through hole, 1033-cavity, 104-sliding tooth block, 1041-sliding rod, 1042-tooth plate, 1043-shaft shoulder, 1044-reset spring, 1051-protection motor, 1052-connecting rope, 2-female half-coupling, 201-female head bushing, 202-female head connecting seat, 203-internal gear ring. Detailed Implementation
[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0027] like Figure 1 and 2 As shown, a centrifugal safety coupling includes a male half-coupling 1 and a female half-coupling 2; the male half-coupling 1 and the female half-coupling 2 are connected in a relative mating manner.
[0028] like Figure 3 and 4As shown, the male half-coupling 1 includes a male bushing 101 and a male connecting seat 102; one side of the male connecting seat 102 is connected to the male bushing 101, and the other side is provided with a mounting seat 103; the male bushing 101 is used to fit onto the drive shaft. When the drive shaft rotates, it can drive the male bushing 101 to rotate, thereby driving the male half-coupling 1 to rotate, and then through the cooperation between the male half-coupling 1 and the female half-coupling 2, the female half-coupling 2 can be rotated; the mounting seat 103 has three radially arranged guide sleeves 1031 evenly distributed circumferentially; the guide sleeve 1031 is hollow inside, and its end away from the mounting seat 103 is provided with an opening; a sliding tooth block 104 is slidably provided in the guide sleeve 1031; a retaining ring is provided at the edge of the opening of the guide sleeve 1031 extending inward, which can be used to limit the sliding tooth block 104 and prevent it from sliding out of the guide sleeve 1031;
[0029] The sliding tooth block 104 includes a sliding rod 1041, a reset elastic element, and a toothed plate 1042. The sliding rod 1041 is slidably disposed in the guide sleeve 1031. The toothed plate 1042 is disposed on the sliding rod 1041 at one end away from the guide sleeve 1031. A shoulder 1043 is provided on the sliding rod 1041 at one end away from the toothed plate 1042. The reset elastic element is preferably a reset spring 1044, which surrounds the sliding rod 1041. One end of the reset spring 1044 is connected to the shoulder 1043, and the other end is connected to the retaining ring. When the male half-coupling 1 rotates with the drive shaft, the sliding tooth block 104 slides outward under the action of centrifugal force, compressing the reset spring 1044. When the rotational speed of the male half-coupling 1 decreases, the reset spring 1044 unfolds, allowing the sliding tooth block 104 to retract.
[0030] Specifically, the inner side of the opening of the guide sleeve 1031 is provided with a guide rib; the side of the sliding rod 1041 is provided with a guide groove that cooperates with the guide rib, so that the sliding rod 1041 can slide along the guide groove, avoid the sliding tooth block 104 from deviating when sliding, and ensure its sliding stability and accuracy.
[0031] More specifically, the mounting base 103 also includes a cavity 1033, a protective motor 1051, connecting ropes 1052, a power supply, and a controller. The cavity 1033 is located at the center of the mounting base 103. Through holes 1032 are provided on the sidewalls of the cavity 1033 corresponding to the three surrounding guide sleeves 1031. The protective motor 1051 is located within the cavity 1033, and three connecting ropes 1052 are circumferentially distributed along its shaft, corresponding one-to-one with the three surrounding guide sleeves 1031. One end of each connecting rope 1052 passes through the through hole 1032 and is connected to one end of the sliding tooth block 104. The rotation of the protective motor 1051 causes the three connecting ropes 1052 distributed on the shaft to retract around the shaft, thus achieving the retraction of the sliding tooth block 104. The toothed block 104 is quickly pulled back along the guide sleeve 1031; the controller is located inside the mounting base 103 and is electrically connected to the protection motor 1051. The controller is used to receive signals and control the start and stop of the protection motor 1051; a control terminal is also provided, which can be used to send signals to the controller to control its operation; a battery slot is provided on one side of the mounting base 103 for installing a power supply and electrically connecting the battery slot to the protection motor 1051; a battery cover is provided on the battery slot to protect the battery and prevent it from falling off; the power supply is preferably a button battery; it should be noted that the controller and the control terminal are existing technologies. The controller is a switch that can receive signals, and the control terminal is used to send signals. They are not improvements in this embodiment and will not be described in detail here.
[0032] like Figure 5 As shown, the female half-coupling 2 includes a female head bushing 201 and a female head connecting seat 202; one side of the female head connecting seat 202 is connected to the female head bushing 201, and the other side is provided with an internal gear ring 203 that meshes with the gear plate 1042; the female head bushing 201 is used to fit onto the driven shaft. When the drive shaft rotates, it can drive the male head bushing 101 to rotate, and through the cooperation connection between the male half-coupling 1 and the female half-coupling 2, the female half-coupling 2 can rotate simultaneously, ultimately driving the driven shaft to rotate; when the male half-coupling 1 rotates with the drive shaft, the sliding tooth block 104 slides outward under the action of centrifugal force, and the tooth plate 1042 on it contacts and meshes with the internal gear ring 203, realizing the mutual connection between the male half-coupling 1 and the female half-coupling 2;
[0033] Specifically, the teeth of the internal gear ring 203 are provided with guide chamfers; the teeth of the tooth plate 1042 are also provided with guide chamfers that cooperate with the guide chamfers. By having the guide chamfer at one end of the sliding tooth block 104 cooperate with the guide chamfer of the internal gear ring 203, the tooth profile is automatically aligned and meshed during high-speed rotation, reducing collisions caused by misalignment during meshing.
[0034] The working principle of this embodiment is as follows:
[0035] This utility model discloses a centrifugal safety coupling. The male sleeve 101 of the male half-coupling 1 is fitted onto the drive shaft, and the female sleeve 201 of the female half-coupling 2 is fitted onto the driven shaft. The male half-coupling 1 and female half-coupling 2 are then aligned, with the male and female connecting seats 102 and 202 concentrically positioned and their centers aligned as closely as possible. The toothed plate 1042 is positioned inside the internal gear ring 203, and when it slides outward, it engages with the internal gear ring 203. When the drive shaft rotates, it drives the male sleeve 101 to rotate, thereby driving the male half-coupling 1 to rotate. Under centrifugal force, the sliding tooth block 104 slides outward, compressing the return spring 1044. The toothed plate 1042 on it contacts and engages with the internal gear ring 203, thus realizing the connection between the male half-coupling 1 and the female half-coupling 2. The female coupling heads 2 are interconnected, which in turn drives the rotation of the female coupling head 2, ultimately driving the driven shaft to rotate. When the drive shaft stops working and the speed of the male coupling head 1 decreases, the centrifugal force decreases, and the return spring 1044 unfolds, causing the sliding tooth block 104 to slide towards the mounting base 103 and retract, so that the tooth plate 1042 disengages from the inner tooth ring 203, realizing the separation of the male coupling head 1 and the female coupling head 2 on both sides of the coupling, thus protecting the coupling and the drive. In an emergency, a signal can be sent to the controller through the control terminal to start the protection motor 1051 to rotate, so that the connecting rope 1052 distributed on the shaft is wound around the shaft and retracted, quickly pulling the sliding tooth block 104 back along the guide sleeve 1031, thereby forcibly disengaging the tooth plate 1042 from the inner tooth ring 203, providing multi-level protection and achieving double insurance.
[0036] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A centrifugal safety coupling, characterized in that, include: The male half-coupling includes a male bushing and a male connector; one side of the male connector is connected to the male bushing, and the other side is provided with a mounting seat; the mounting seat has several radially evenly distributed guide sleeves on the circumference; a sliding tooth block is slidably provided in the guide sleeve; one end of the sliding tooth block is connected to the mounting seat through a reset elastic element, and the other end is provided with a tooth plate; The half-coupling female head includes a female head bushing and a female head connecting seat; one side of the female head connecting seat is connected to the female head bushing, and the other side is provided with an internal gear ring that meshes with the gear plate.
2. A centrifugal safety coupling according to claim 1, characterized in that, The sliding tooth block includes a sliding rod and a toothed plate; the sliding rod is slidably disposed in the guide sleeve; the toothed plate is disposed on the sliding rod at one end away from the guide sleeve.
3. A centrifugal safety coupling according to claim 2, characterized in that, The reset elastic element is a reset spring.
4. A centrifugal safety coupling according to claim 3, characterized in that, The sliding rod has a shoulder at one end away from the toothed plate; a retaining ring extends inward from the opening of one end of the guide sleeve; the return spring is arranged around the sliding rod, with one end connected to the shoulder and the other end connected to the retaining ring.
5. A centrifugal safety coupling according to claim 4, characterized in that, The guide sleeve has a guide rib at its opening; the sliding rod has a guide groove on its side that cooperates with the guide rib.
6. A centrifugal safety coupling according to claim 1, characterized in that, The mounting base also includes a cavity, a protective motor, connecting ropes, a power supply, and a controller. The cavity is located at the center of the mounting base. Through holes are provided on the sidewalls of the cavity corresponding to several guide sleeves. The protective motor is located within the cavity, and several connecting ropes are circumferentially distributed along its shaft, each corresponding to one of the guide sleeves. One end of each connecting rope passes through a through hole and is connected to a sliding tooth block. The controller is located inside the mounting base and is electrically connected to the protective motor. A power supply is also provided on one side of the mounting base and is electrically connected to the protective motor.
7. A centrifugal safety coupling according to claim 6, characterized in that, The mounting base has a battery slot on one side for installing a power source.
8. A centrifugal safety coupling according to claim 1, characterized in that, The teeth of the internal gear ring are provided with guide chamfers; the teeth of the gear plate are also provided with guide chamfers that cooperate with the guide chamfers.