Coaxial reverse self-locking speed reducer

Abstract

The utility model discloses a coaxial reverse self-locking speed reducer, which relates to the technical field of speed reducers and comprises a main shell, an input end and an output end, a pin fluted disc and a worm gear are arranged in the coaxial reverse self-locking speed reducer, and the coaxial reverse self-locking speed reducer is coaxially provided with a worm group in a transmission manner. A telescopic cylindrical pin is arranged on one side of the pin tooth disc, three worm sets are arranged, the included angle is 60 degrees, each worm set comprises a worm shaft and a pin tooth grooved wheel, and the worm shafts and the pin tooth grooved wheels are meshed with the worm gear and the cylindrical pin. The utility model has the advantages of compact structure, stable transmission, high reliability, and easy installation and maintenance. And through a mechanical locking structure, self-locking is achieved, and accidental damage is avoided. The structure is compact, the occupied space is reduced, the size is small and the weight is light.

Description

Technical Field

[0001] The utility model belongs to the technical field of reducers, and particularly relates to a coaxial reverse self-locking reducer. Background Art

[0002] With the development of customized and proprietary battery swap station products, there are higher requirements for safety, reliability and stability of mechanical structures such as vehicle lifting, vehicle positioning, and battery transportation. It is necessary to consider that in the event of an unexpected loss of power, the mechanism must be able to stop in the current state without shifting, to ensure that vehicles, batteries and other items are not damaged by falling, squeezing, bumping, etc.

[0003] Traditional transmission mechanisms basically use motors and reducers to drive screws. When stopping at any position, they need to be kept stationary by a motor brake. The motor brake is controlled by electricity, and long-term use causes wear and tear, which gradually reduces the self-locking ability. For the above reasons, a mechanical locking structure is required in the transmission link to keep the mechanism stationary. Utility Model Content

[0004] The main technical problem solved by the utility model is to provide a coaxial reverse self-locking reducer, which is a mechanical reduction device that can realize self-locking of the rotation direction without external force.

[0005] In order to solve the above technical problems, a technical solution adopted by the utility model is:

[0006] A coaxial reverse self-locking reducer, comprising a main housing, wherein two ends of the main housing are respectively an input end and an output end, a pin-toothed disc is rotatably arranged inside the main housing at the input end, and a worm wheel is rotatably arranged inside the main housing at the output end, the pin-toothed disc and the worm wheel are coaxially arranged, and a worm group is transmitted between the pin-toothed disc and the worm wheel;

[0007] The pin-toothed disk has retractable cylindrical pins evenly distributed circumferentially on one side facing the output end. The worm gear groups are provided with three groups. The three groups of worm gear groups are circumferentially distributed on the outside of the worm wheel, and the angle between adjacent worm gear groups is 60°. The worm gear group includes a worm shaft and a pin-toothed groove wheel. The worm shaft is rotatably mounted inside the main housing through a bearing, and the pin-toothed groove wheel is fixedly mounted on the worm shaft. The worm shaft is meshed with the worm wheel, and the pin-toothed groove wheel is meshed with the cylindrical pin.

[0008] Furthermore, the number of the cylindrical pins is 24.

[0009] Furthermore, the pin-toothed groove wheel has 8 equally divided trapezoidal grooves, the trapezoidal grooves mesh with the cylindrical pins, the groove width of the trapezoidal grooves is greater than the diameter of the cylindrical pins, and the two ends of the trapezoidal grooves are flared to facilitate the cylindrical pins to cut into the grooves.

[0010] When the pin-toothed disc rotates, the cylindrical pins mesh with the trapezoidal grooves of the pin-toothed groove wheel in an orderly manner, and the pin-toothed groove wheel rotates through the tangential force along the pin-toothed disc, transmitting the power to the worm group, ensuring the synchronization of the speed of the three worm groups. Specifically, each cylindrical pin meshes with a trapezoidal groove of the pin-toothed groove wheel once, which can make it rotate 1 / 8 of a circle, that is, the entire pin-toothed disc rotates 1 circle, the pin-toothed groove wheel rotates 3 circles, and the input end power is transmitted to the worm shaft connected to the pin-toothed groove wheel.

[0011] The pin-toothed groove wheel and the worm shaft are connected by a key, and the speed ratio of the worm shaft to the worm wheel is 45:1, that is, the worm shaft rotates 1 circle, and the worm wheel rotates 1 / 45 circle. Combined with the 1:3 speed ratio of the pin-toothed plate and the pin-toothed groove wheel, the final speed ratio of the input pin-toothed plate and the output worm wheel shaft is 15:1. That is, the input end rotates 1 circle and the output end rotates 1 / 15 circle.

[0012] Furthermore, the main housing is in the shape of a hexagonal prism as a whole, and three side surfaces of the main housing are detachable bearing end plates, the three bearing end plates are spaced apart, and one end bearing of the worm shaft is respectively installed thereon.

[0013] The main housing has a special structure, and the worm shaft is fixed by the bearing installation position, so that the worm shaft can only rotate along its axis. The setting of the bearing end plate can facilitate the installation and maintenance of the worm group.

[0014] Furthermore, the worm gear set is a star worm gear.

[0015] Furthermore, the bearing is a deep groove ball bearing.

[0016] Furthermore, the pin-toothed disc is connected to an input shaft, and the worm gear is connected to an output shaft.

[0017] Furthermore, the power unit can be connected to the input shaft by using a keyway hole, a spline hole or a double-piece clamp.

[0018] Furthermore, a structure that enables the cylindrical pin to be retracted includes a pin hole, a compression spring, and a riveted end cover. The pin tooth disk is provided with a pin hole, and the cylindrical pin can be slidably arranged along the pin hole, and the materials of the cylindrical pin and the pin hole are friction pairs with each other; the compression spring is located in the pin hole of the pin tooth disk, between the cylindrical pin and the riveted end cover, to support the cylindrical pin; the riveted end cover can keep the spring pin from falling out under pressure. This structure ensures that the cylindrical pin and the groove wheel always maintain the maximum meshing size during the meshing process, and can retreat 4mm of travel as the pin tooth groove wheel rotates.

[0019] The beneficial technical effects of the utility model are:

[0020] The utility model adopts a mechanical locking structure, which enables the device to achieve self-locking in the direction of rotation without relying on external power, thereby ensuring that the static state of the mechanism can be maintained in the event of an accidental loss of power, effectively avoiding damage to vehicles, batteries and other items caused by factors such as falling, squeezing, and bumping. In addition, the use of transmission mechanical parts can effectively reduce manufacturing costs.

[0021] The input shaft and output shaft of the utility model are on the same axis, making the entire transmission system structure more compact, greatly reducing the extra space occupation, making the overall size of the device small and light. At the same time, this compact structural design also simplifies the layout and installation process of the transmission system, and also has a detachable bearing end plate, making the installation and maintenance process of the worm group more convenient and quick, further improving the rotation stability and service life of the reducer. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 It is a schematic diagram of the overall structure of the utility model (half-section view);

[0024] Figure 3 It is a schematic diagram of the internal structure of the main housing of the utility model (excluding the main housing);

[0025] Figure 4 yes Figure 3 Another perspective of

[0026] Figure 5 This is a schematic diagram of the pin tooth disc structure of the utility model;

[0027] Figure 6 It is a schematic diagram of the structure of the worm gear group of the utility model;

[0028] The parts in the accompanying drawings are marked as follows:

[0029] 1. Input terminal;

[0030] 2. Output terminal;

[0031] 3. Main housing; 31. Bearing end plate;

[0032] 4. Pin toothed disc; 41. Cylindrical pin;

[0033] 5. Worm gear;

[0034] 6. Worm gear assembly; 61. Worm shaft; 62. Pin-tooth groove wheel; 621. Trapezoidal groove; 63. Bearing. DETAILED DESCRIPTION

[0035] In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the specific implementation methods of the utility model are further described in detail below in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0036] This specific embodiment discloses in detail a coaxial reverse self-locking reducer, such as Figures 1 to 6 As shown, it includes a main housing 3, which is in the shape of a hexagonal prism as a whole, and its two ends are respectively an input end 1 and an output end 2. Inside the main housing 3, a pin-toothed disc 4 is rotatably arranged at the input end 1, and a worm gear 5 is rotatably arranged at the output end 2. The pin-toothed disc 4 and the worm gear 5 are coaxially arranged.

[0037] In order to realize the power transmission between the pin-toothed disk 4 and the worm wheel 5, a worm gear group 6 is arranged between the pin-toothed disk 4 and the worm wheel 5. There are three worm gear groups 6, and these three worm gear groups 6 are circumferentially distributed outside the worm wheel 5, and the angle between adjacent worm gear groups 6 is 60°. Such a layout enables the three worm gear groups 6 to be evenly stressed, reduces the vibration and noise during the transmission process, and also improves the reliability of the transmission.

[0038] The worm set 6 is composed of a worm shaft 61 and a pin-toothed groove wheel 62. The worm shaft 61 is rotatably mounted inside the main housing 3 through a bearing 63, and the pin-toothed groove wheel 62 is fixedly mounted on the worm shaft 61. The pin-toothed groove wheel has 8 equally divided trapezoidal grooves. Twenty-four retractable cylindrical pins 41 are evenly distributed circumferentially on one side of the pin-toothed disk 4 facing the output end 2, and these cylindrical pins 41 can be orderly meshed with the trapezoidal grooves 621 on the pin-toothed groove wheel 62. The worm shaft 61 meshes with the worm wheel 5, and the pin-toothed groove wheel 62 meshes with the cylindrical pins 41 on the pin-toothed disk 4.

[0039] Both ends of the trapezoidal groove 621 are designed as bell mouths, and the groove width of the trapezoidal groove 621 is larger than the diameter of the cylindrical pin 41 to ensure that the cylindrical pin 41 can smoothly enter the trapezoidal groove 621.

[0040] When the pin-toothed disk 4 rotates, the cylindrical pins 41 will mesh with the trapezoidal grooves 621 of the pin-toothed groove wheel 62 in sequence, and the pin-toothed groove wheel 62 will rotate through the tangential force along the pin-toothed disk 4, thereby transmitting the power to the worm set 6. Each cylindrical pin 41 meshes with one trapezoidal groove 621 of the pin-toothed groove wheel 62 once, which can make it rotate 1 / 8 of a circle. When the entire pin-toothed disk 4 rotates one circle, the pin-toothed groove wheel 62 will rotate three circles and transmit the power at the input end to the worm shaft 61 connected to the pin-toothed groove wheel 62.

[0041] The pin-toothed groove wheel 62 and the worm shaft 61 are connected by a key, and the speed ratio of the worm shaft 61 to the worm wheel 5 is 45:1, that is, when the worm shaft 61 rotates 1 circle, the worm wheel 5 rotates 1 / 45 circle, combined with the 1:3 speed ratio of the pin-toothed plate 4 and the pin-toothed groove wheel 62, the speed ratio of the pin-toothed plate 4 at the input end and the worm wheel 5 at the output end is 15:1. That is, when the input end rotates 1 circle, the output end rotates 1 / 15 circle.

[0042] In order to facilitate the installation and maintenance of the worm gear set 6, three of the side surfaces of the main housing 3 are detachably provided with bearing end plates. These bearing end plates are arranged at intervals and are respectively provided with bearings 63 at one end of the worm shaft 61. When the worm gear set 6 needs to be repaired or replaced, only the corresponding bearing end plate needs to be removed without removing the entire main housing 3, which greatly improves the convenience of maintenance.

[0043] In addition, a special cylindrical pin telescopic structure is also used in this embodiment, including a pin hole, a compression spring and a riveted end cover. The pin tooth disk 4 is provided with a pin hole, and the cylindrical pin 41 can be slidably arranged along the pin hole, and the cylindrical pin and the pin hole material form a friction pair with each other; the compression spring is located in the pin hole of the pin tooth disk, between the cylindrical pin and the riveted end cover, to support the cylindrical pin; the riveted end cover can keep the spring pin from falling out under pressure. This structure can ensure that the cylindrical pin 41 and the pin tooth groove wheel 62 always maintain the maximum meshing size during the meshing process, and can retreat a certain stroke as the pin tooth groove wheel 62 rotates. It not only improves the stability of the transmission, but also extends the service life of the reducer.

[0044] In summary, the coaxial reverse self-locking reducer of the utility model has the advantages of compact structure, stable transmission, high reliability, easy installation and maintenance, etc. By adopting a mechanical locking structure, the reducer can achieve self-locking in the direction of rotation without relying on external power, effectively avoiding damage caused by accidental loss of power. At the same time, its compact structural design also greatly reduces the additional space occupation, making the overall size of the device small and light.

[0045] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "front", "back", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0046] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or integrally connected or set. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. A coaxial reverse self-locking reducer, comprising a main housing (3), wherein two ends of the main housing are an input end (1) and an output end (2), respectively, and characterized in that: A pin-toothed disc (4) is rotatably arranged inside the main housing at the input end, and a worm wheel (5) is rotatably arranged inside the main housing at the output end, the pin-toothed disc and the worm wheel are coaxially arranged, and a worm gear group (6) is arranged between the pin-toothed disc and the worm wheel for transmission; The pin-toothed disk has a side facing the output end uniformly distributed with retractable cylindrical pins (41) in the circumferential direction. The worm gear group is provided with three groups. The three groups of worm gear groups are distributed circumferentially on the outside of the worm wheel, and the angle between adjacent worm gear groups is 60°. The worm gear group includes a worm shaft (61) and a pin-toothed groove wheel (62). The worm shaft is rotatably mounted inside the main housing through a bearing. The pin-toothed groove wheel is fixedly mounted on the worm shaft. The worm shaft is meshed with the worm wheel, and the pin-toothed groove wheel is meshed with the cylindrical pin.

2. A coaxial reverse self-locking reducer according to claim 1, characterized in that: The number of the cylindrical pins is 24.

3. A coaxial reverse self-locking reducer according to claim 2, characterized in that: The pin-toothed groove wheel has eight equally divided trapezoidal grooves (621), the trapezoidal grooves meshing with the cylindrical pins, and the groove width of the trapezoidal grooves is greater than the diameter of the cylindrical pins.

4. The coaxial reverse self-locking reducer according to claim 1, characterized in that: The main housing is in the shape of a hexagonal prism as a whole, and three side surfaces of the main housing are detachably mounted bearing end plates (31). The three bearing end plates are spaced apart and are respectively mounted with bearings at one end of the worm shaft.

5. The coaxial reverse self-locking reducer according to claim 1, characterized in that: The worm gear set is a star-type worm gear.

6. The coaxial reverse self-locking reducer according to claim 1, characterized in that: The bearing is a deep groove ball bearing.

7. The coaxial reverse self-locking reducer according to claim 1, characterized in that: The pin gear disk is connected with an input shaft, and the worm gear is connected with an output shaft.

8. A coaxial reverse self-locking reducer according to claim 7, characterized in that: The power unit can be connected to the input shaft by using a keyway hole, a spline hole or a double-piece clamp.

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