Planetary gear reducer with built-in load sharing mechanism

Abstract

The utility model relates to planetary gear reducer technical field especially relates to a planetary gear reducer of built -in uniform load mechanism. The planetary gear reducer of built -in uniform load mechanism, including base, the base inside is provided with lifting mechanism, the gear reduction mechanism is provided with above base, the lifting mechanism includes sliding block and rotary lever, the rotary lever is installed in the base inside, the sliding block number is multiple, the rotary lever both ends are respectively connected in the sliding block inner wall both sides rotationally. Through the hydraulic rod drive sliding block linear sliding in lifting mechanism, sliding block drives multiple rotary lever to rotate around connecting axle, forms the scissor type support structure, can realize the accurate regulation and positioning of height, ensures the coaxality of speed reducer input shaft and motor shaft, avoids the transmission failure caused by alignment deviation, simultaneously, the scissor type structure can evenly disperse the pressure of bearing plate, realizes the uniform load effect, promotes the bearing capacity and life of lifting mechanism.

Description

Technical Field

[0001] This utility model relates to the field of planetary gear reducer technology, and in particular to a planetary gear reducer with a built-in load sharing mechanism. Background Technology

[0002] Planetary gear reducers are widely used in industrial transmission scenarios. Their core consists of a sun gear, planetary gears, an internal gear ring, and a planetary gear set. They are suitable for various equipment due to their small size and high transmission efficiency. However, the installation height adjustment relies on shims to raise the gear, which has a large accuracy error and makes it difficult to achieve precise alignment with motors and other connected equipment. This can easily lead to transmission noise, bearing wear, and other malfunctions.

[0003] For example, the planetary gear reducer with patent publication number "CN215567693U" uses a built-in lifting component in the base to drive the bidirectional threaded rod to rotate by turning the handwheel. The reverse thread on the rod drives two drive blocks to move closer or further apart, and then the connecting rod pushes the mounting plate to move up and down, achieving precise adjustment of the input shaft height without relying on shims. In terms of heat dissipation, this patent sets heat sinks on the outside of the housing and installs a fixed frame with fan blades on the input shaft. When the input shaft rotates, it drives the fan blades to rotate synchronously, blowing air onto the housing to accelerate heat dissipation.

[0004] However, the lifting assembly in the aforementioned patent relies on the threaded transmission between the bidirectional threaded rod and the drive block. The threaded engagement has mechanical clearance, which will increase due to wear after long-term use, resulting in a decrease in the height positioning accuracy of the mounting plate and making it difficult to maintain a stable alignment. Utility Model Content

[0005] The purpose of this invention is to provide a planetary gear reducer with a built-in load-sharing mechanism, which solves the problem in the prior art where the lifting component relies on the threaded transmission between the bidirectional threaded rod and the drive block. The threaded connection has mechanical clearance, and after long-term use, the clearance will increase due to wear, resulting in a decrease in the height positioning accuracy of the mounting plate and difficulty in maintaining a stable alignment.

[0006] To achieve the above objectives, this utility model provides a planetary gear reducer with a built-in load-sharing mechanism, including a base. The base is equipped with a lifting mechanism for adjusting the height of the device. A gear reduction mechanism is provided above the base. The lifting mechanism includes a slider and a rotating rod. The rotating rod is installed inside the base. There are multiple sliders. The two ends of the rotating rod are rotatably connected to both sides of the inner wall of the slider.

[0007] The base has guide rollers fixedly installed on both sides inside, and the slider is slidably connected to the surface of the guide rollers. A hydraulic rod is fixedly installed on one side of the inner wall of the base, and the slider is fixedly installed on one end of the hydraulic rod.

[0008] The rotating rods are multiple in number, and a connecting shaft is rotatably connected to the inner wall surface of each rotating rod. The connecting shaft is rotatably connected to the inner wall surface of another rotating rod.

[0009] The base has a support plate on its upper surface, a guide rail fixedly installed on the lower surface of the support plate, a slider slidably connected to the inner wall surface of the guide rail, and a support rod fixedly installed on the upper surface of the support plate.

[0010] The support rod has a gearbox fixedly installed on its upper surface, a front cover fixedly installed on one side of the gearbox, and a tail cover fixedly installed on the other side of the gearbox.

[0011] The inner wall surface of the front cover is rotatably connected to a shaft end cover, one end of which is fixedly mounted with a central shaft, and the other end of which is fixedly connected to one side of the tail cover.

[0012] The central shaft surface is fixedly mounted with a gear sleeve, and the inner wall surface of the gearbox is rotatably connected with an outer gear ring. The gear sleeve meshes with the outer gear ring, and both the surface of the gear sleeve and the inner wall surface of the outer gear ring are coated with titanium nitride coating.

[0013] The central shaft surface is fixedly mounted with a spacer, and the inner wall surface of the spacer is rolledly connected with a deep groove ball bearing.

[0014] 1. In this utility model, a hydraulic rod in the lifting mechanism drives a slider to slide linearly along a guide roller. The slider drives multiple sets of rotating rods to rotate around a connecting shaft, forming a scissor-type support structure, which simultaneously pushes the bearing plate to rise and fall smoothly along the guide rail. Compared with the existing threaded transmission, hydraulic transmission has no mechanical backlash and stable driving force, enabling precise height adjustment and positioning, ensuring the coaxiality of the gearbox input shaft and the motor shaft, and avoiding transmission failures caused by alignment deviations. At the same time, the scissor-type structure can evenly distribute the pressure on the bearing plate, achieving a load-sharing effect and improving the load-bearing capacity and service life of the lifting mechanism.

[0015] 2. In this utility model, the central shaft in the gear reduction mechanism drives the gear sleeve and the outer gear ring to mesh and transmit power. The titanium nitride coating on the surface of the gear sleeve and the outer gear ring has the characteristics of high hardness and low friction coefficient, which can significantly reduce gear meshing wear, extend gear service life, and solve the problem of easy gear wear in the prior art. The spacer sleeve combined with the deep groove ball bearing can reduce the radial runout of the central shaft, improve rotational stability, and at the same time reduce the rotational resistance of the central shaft, reducing energy loss. The front cover and the tail cover adopt a split design, so there is no need to disassemble the entire gearbox during maintenance. Only the end cover needs to be removed to maintain the internal gear assembly, simplifying the operation process and improving maintenance efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0018] Figure 2 This is a structural schematic diagram of the lifting mechanism according to an embodiment of the present utility model.

[0019] Figure 3 This is a schematic diagram of the internal structure of the gearbox in an embodiment of this utility model.

[0020] Figure 4 This is a schematic diagram of the central shaft and its connections in an embodiment of the present invention.

[0021] Figure 5 This is a schematic diagram of the external gear ring according to an embodiment of the present invention.

[0022] In the diagram: 1. Base; 2. Lifting mechanism; 201. Guide roller; 202. Hydraulic rod; 203. Slider; 204. Rotating rod; 205. Connecting shaft; 206. Guide rail; 207. Bearing plate; 208. Support rod; 3. Gear reduction mechanism; 301. Gearbox; 302. Front cover; 303. Tail cover; 304. Central shaft; 305. Shaft end cover; 306. Gear sleeve; 307. External gear ring; 308. Spacer; 309. Deep groove ball bearing; 310. Titanium nitride coating. Detailed Implementation

[0023] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0024] Please see Figure 1 - Figure 5As shown, a planetary gear reducer with a built-in load-sharing mechanism includes a base 1. The base 1 is equipped with a lifting mechanism 2 for adjusting the height of the device. A gear reduction mechanism 3 is provided above the base 1. The lifting mechanism 2 includes a slider 203 and a rotating rod 204. The rotating rod 204 is installed inside the base 1. There are multiple sliders 203. The two ends of the rotating rod 204 are rotatably connected to the two sides of the inner wall of the slider 203. The slider 203 provides a rotational support point for the rotating rod 204. Multiple sets of rotating rods 204 are rotatably connected to the slider 203 at both ends, forming a foldable support structure. When the slider 203 moves relative to the base 1, it drives the rotating rod 204 to rotate around the connection point, changing the tilt angle of the rotating rod 204, thereby pushing the top load-bearing structure to rise and fall, realizing the height adjustment of the device. Through the cooperation of the slider 203 and the rotating rod 204, the core transmission structure of the lifting mechanism 2 is constructed, providing basic mechanical support for the height adjustment of the device. At the same time, the combination of multiple sliders 203 and rotating rods 204 can distribute the top load, achieving a preliminary load-sharing effect and avoiding structural damage caused by excessive local stress. Guide rollers 201 are fixedly installed on both sides inside the base 1, and the slider 203 is slidably connected to the surface of the guide rollers 201. A hydraulic rod 202 is fixedly installed on one side of the inner wall of the base 1, and the slider 203 is fixedly installed on one end of the hydraulic rod 202. When the hydraulic rod 202 is energized or energized, it generates a linear driving force, pushing the slider 203 fixed to it to slide along the surface of the guide roller 201. The guide roller 201 replaces the sliding friction between the slider 203 and the base 1 with rolling friction, reducing the movement resistance of the slider 203 and limiting the movement direction of the slider 203, ensuring that the slider 203 moves smoothly only in the horizontal direction. The hydraulic rod 202 provides a stable power source for the movement of the slider 203, which can realize the automation and precision of height adjustment compared with manual or threaded transmission. The guide roller 201 ensures the linearity and smoothness of the movement of the slider 203, avoiding the slider 203 from deviating and causing the lifting mechanism 2 to jam or be damaged, thus improving the stability and efficiency of height adjustment. There are multiple rotating rods 204, and a connecting shaft 205 is rotatably connected to the inner wall surface of the rotating rod 204. The connecting shaft 205 is rotatably connected to the inner wall surface of another rotating rod 204. Multiple rotating rods 204 are connected end to end via connecting shaft 205 to form a scissor-like structure. When the sliders 203 on both sides approach each other, the rotating rods 204 rotate around the connecting shaft 205, the scissor structure unfolds, and the top support height increases. When the sliders 203 move away from each other, the scissor structure retracts, the top support height decreases, and the rotation angle of all rotating rods 204 changes synchronously to ensure a smooth lifting process. The scissor-like structure can convert the horizontal movement of the sliders 203 into vertical lifting of the top, increasing the height adjustment range. At the same time, the combination of multiple sets of rotating rods 204 and connecting shaft 205 can evenly distribute the top load, enhance the load-bearing capacity of the lifting mechanism 2, and avoid bending or breaking of the rotating rods 204 due to excessive force at a single point.A support plate 207 is placed on the upper surface of the base 1, and a guide rail 206 is fixedly installed on the lower surface of the support plate 207. A slider 203 is slidably connected to the inner wall surface of the guide rail 206, and a support rod 208 is fixedly installed on the upper surface of the support plate 207. When the lifting mechanism 2 is running, the top of the rotating rod 204 is slidably connected to the guide rail 206 on the lower surface of the support plate 207 through the slider 203. When the rotating rod 204 is extended or retracted, the top slider 203 slides horizontally along the guide rail 206, and in conjunction with the movement of the bottom slider 203, the vertical lifting of the support plate 207 is achieved. The support rod 208 is fixed to the upper surface of the support plate 207, transferring the load of the support plate 207 to the top reduction gearbox 301, while maintaining a fixed distance between the reduction gearbox 301 and the support plate 207.

[0025] Please see Figure 1 - Figure 5As shown, a gearbox 301 is fixedly mounted on the upper surface of the support rod 208. A front cover 302 is fixedly mounted on one side of the gearbox 301, and a tail cover 303 is fixedly mounted on the other side. The support rod 208 is fixed to the bottom of the gearbox 301 by bolts or welding, stably supporting the gearbox 301 above the bearing plate 207. The front cover 302 and tail cover 303 are connected to both sides of the gearbox 301 by bolts, forming a closed cavity to protect the internal gear components from external dust and impurities. At the same time, they provide support points at both ends for the central shaft 304. The gearbox 301 provides a closed space for gear transmission, preventing lubricating oil leakage during gear meshing and reducing noise transmission. The front cover 302 and tail cover 303 achieve sealing and protection of the gearbox 301, extend the service life of the internal components, and the split design facilitates later disassembly and maintenance, reducing maintenance difficulty. A shaft end cover 305 is rotatably connected to the inner wall surface of the front cover 302. A central shaft 304 is fixedly mounted on one end of the shaft end cover 305, and the other end of the central shaft 304 is fixedly connected to one side of the tail cover 303. The shaft end cover 305 is nested in the bearing structure of the inner wall of the front cover 302, providing radial support for the central shaft 304. When the central shaft 304 is driven to rotate, the shaft end cover 305 rotates synchronously with the central shaft 304, reducing direct friction between the central shaft 304 and the front cover 302. The other end of the central shaft 304 is fixed to the support structure inside the tail cover 303, forming a two-end positioning to ensure that there is no obvious radial runout when the central shaft 304 rotates. A gear sleeve 306 is fixedly mounted on the surface of the central shaft 304, and an external gear ring 307 is rotatably connected to the inner wall surface of the gearbox 301. The gear sleeve 306 meshes with the external gear ring 307, and both the surface of the gear sleeve 306 and the inner wall surface of the external gear ring 307 are coated with a titanium nitride coating 310. When the central shaft 304 rotates, it drives the gear sleeve 306 to rotate synchronously. The gear sleeve 306 drives the outer gear ring 307 to rotate on the inner wall of the gearbox 301 through tooth meshing. The speed reduction effect is achieved by utilizing the difference in the number of teeth between the gear sleeve 306 and the outer gear ring 307. A titanium nitride coating 310 covers the meshing surfaces of the gear sleeve 306 and the outer gear ring 307, increasing surface hardness and reducing wear and heat generation during meshing. A spacer 308 is fixedly installed on the surface of the central shaft 304, and a deep groove ball bearing 309 is rolledly connected to the inner wall surface of the spacer 308. The spacer 308 is fixed to the surface of the central shaft 304 by interference fit, axially positioning the deep groove ball bearing 309 and preventing axial movement of the deep groove ball bearing 309 when the central shaft 304 rotates. The outer ring of the deep groove ball bearing 309 is fixed to the inner wall of the gearbox 301 or related support structure, and the inner ring rotates synchronously with the central shaft 304. The radial load is converted into rolling friction through the rolling elements, reducing the rotational resistance of the central shaft 304.

[0026] Working Principle: During actual installation and use, the lifting mechanism 2 is first adjusted according to the height requirements of the motor output shaft. The hydraulic rod 202 inside the base 1 is then activated. The hydraulic rod 202 pushes the slider 203 to slide linearly along the guide roller 201. The slider 203 drives multiple sets of rotating rods 204 to rotate synchronously around the connecting shaft 205, forming a scissor-type support structure. This, in turn, pushes the bearing plate 207 to rise or fall smoothly along the guide rail 206. Through precise stroke control of the hydraulic rod 202, the central shaft 304 of the reduction gearbox 301 can be adjusted to the same height as the motor output shaft. After adjustment, the hydraulic rod 202 maintains pressure to achieve height positioning and avoid offset caused by mechanical backlash. During equipment operation, the motor drives the central shaft 304 to rotate. The gear sleeve 306 on the central shaft 304 meshes with the outer gear ring 307 on the inner wall of the reduction gearbox 301, achieving speed reduction through gear transmission. The titanium nitride coating 310 on the surfaces of the gear sleeve 306 and the outer gear ring 307 can reduce the meshing friction coefficient, reduce wear and heat generation; at the same time, the central shaft 304 cooperates with the deep groove ball bearing 309 through the spacer 308 to reduce radial runout, improve rotational stability, and reduce energy loss. When maintenance or adjustment of gear meshing clearance is required, only the front cover 302 or the tail cover 303 needs to be removed to directly observe and operate the internal gear assembly without disassembling the entire gearbox 301, simplifying the maintenance process and improving work efficiency.

[0027] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A planetary gear reducer with a built-in load-sharing mechanism, comprising a base (1), characterized in that: The base (1) is provided with a lifting mechanism (2) for adjusting the height of the device. A gear reduction mechanism (3) is provided above the base (1). The lifting mechanism (2) includes a slider (203) and a rotating rod (204). The rotating rod (204) is installed inside the base (1). There are multiple sliders (203). The two ends of the rotating rod (204) are respectively rotatably connected to the two sides of the inner wall of the slider (203).

2. A planetary gear reducer with a built-in load-sharing mechanism according to claim 1, characterized in that: Guide rollers (201) are fixedly installed on both sides inside the base (1). The slider (203) is slidably connected to the surface of the guide rollers (201). A hydraulic rod (202) is fixedly installed on one side of the inner wall of the base (1). The slider (203) is fixedly installed at one end of the hydraulic rod (202).

3. A planetary gear reducer with a built-in load-sharing mechanism according to claim 1, characterized in that: There are multiple rotating rods (204), and a connecting shaft (205) is rotatably connected to the inner wall surface of the rotating rod (204). The connecting shaft (205) is rotatably connected to the inner wall surface of another rotating rod (204).

4. A planetary gear reducer with a built-in load-sharing mechanism according to claim 1, characterized in that: A support plate (207) is placed on the upper surface of the base (1), a guide rail (206) is fixedly installed on the lower surface of the support plate (207), the slider (203) is slidably connected to the inner wall surface of the guide rail (206), and a support rod (208) is fixedly installed on the upper surface of the support plate (207).

5. A planetary gear reducer with a built-in load-sharing mechanism according to claim 4, characterized in that: A gearbox (301) is fixedly installed on the upper surface of the support rod (208). A front cover (302) is fixedly installed on one side of the gearbox (301), and a tail cover (303) is fixedly installed on the other side of the gearbox (301).

6. A planetary gear reducer with a built-in load-sharing mechanism according to claim 5, characterized in that: The inner wall surface of the front cover (302) is rotatably connected to a shaft end cover (305), one end of which is fixedly mounted with a central shaft (304), and the other end of the central shaft (304) is fixedly connected to one side of the tail cover (303).

7. A planetary gear reducer with a built-in load-sharing mechanism according to claim 6, characterized in that: A gear sleeve (306) is fixedly installed on the surface of the central shaft (304), and an external gear ring (307) is rotatably connected to the inner wall surface of the gearbox (301). The gear sleeve (306) meshes with the external gear ring (307), and both the surface of the gear sleeve (306) and the inner wall surface of the external gear ring (307) are coated with a titanium nitride coating (310).

8. A planetary gear reducer with a built-in load-sharing mechanism according to claim 6, characterized in that: A spacer (308) is fixedly installed on the surface of the central shaft (304), and a deep groove ball bearing (309) is rolledly connected to the inner wall surface of the spacer (308).

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