A speed reducer that is easy to install

Abstract

The application provides a reducer convenient to install. A plurality of rolling friction parts in the reducer are uniformly distributed in a multi-cavity planet carrier and are in sliding connection with the multi-cavity planet carrier. The plurality of rolling friction parts are in abutment with one end of a transmission part inserted into the multi-cavity planet carrier. When a transmission shaft is installed into the multi-cavity planet carrier, the transmission shaft is in abutment with the plurality of rolling friction parts to extrude the plurality of rolling friction parts to move in the radial direction in the multi-cavity planet carrier, so that part of the side walls of the plurality of rolling friction parts are exposed from the multi-cavity planet carrier and are in abutment with a first outer ring and a second outer ring. Therefore, the assembly of the reducer is easier, and the defect that the assembly of the reducer is difficult is avoided. Furthermore, the upper and lower end covers of the planet carrier in the reducer are not arranged, and the upper and lower end covers and the planet carrier are not fixedly connected by using a connecting rod and laser welding. Therefore, the installation process is simplified, and the installation cost is saved.

Description

Technical Field

[0001] This application relates to the field of speed reducer technology, and more specifically, to a speed reducer that is easy to install. Background Technology

[0002] Miniature electric cylinders typically use planetary reducers as the transmission mechanism. Planetary reducers usually use planetary gears for transmission. Because the module of planetary gears is small, the tooth surface contact stress increases after the gear size is reduced, which can easily lead to accelerated tooth surface wear and affect the service life of the reducer.

[0003] Planetary reducers operate based on the principle of planetary gear meshing transmission. During transmission, when the input speed of the drive component is too high, it will cause high-frequency vibration of the gears inside the reducer, resulting in significant noise problems. At the same time, existing planetary reducers face drawbacks in miniaturization, such as cumbersome structural design, difficult manufacturing and assembly operations, large overall size, and short service life.

[0004] In response to this situation, how to design a new type of reducer that is simple in structure, easy to assemble, reliable in operation, low in noise and long in service life has become a key problem that professionals in this field urgently need to overcome. Utility Model Content

[0005] To address the aforementioned problems, the purpose of this application is to provide a speed reducer that is easy to install.

[0006] In a first aspect, embodiments of this application provide a speed reducer that is easy to install, comprising: a first outer ring, a second outer ring, a multi-cavity planetary carrier, multiple rolling friction parts, and a transmission part;

[0007] The first outer ring and the second outer ring are sleeved on the outside of the multi-cavity planetary carrier. The first outer ring is fixed on the multi-cavity planetary carrier. Multiple rolling friction parts 400 are evenly distributed inside the multi-cavity planetary carrier and are slidably connected to the multi-cavity planetary carrier.

[0008] The side of the multi-cavity planetary carrier furthest from the drive unit is connected to the second outer ring drive.

[0009] One end of the transmission unit, inserted into the multi-cavity planetary carrier, abuts against multiple rolling friction parts.

[0010] In the solution provided by the first aspect of this application embodiment, multiple rolling friction parts in the reducer are evenly distributed within the multi-cavity planetary carrier and slidably connected to it. When the drive shaft is installed into the multi-cavity planetary carrier, one end of the drive part inserted into the multi-cavity planetary carrier abuts against the multiple rolling friction parts, squeezing the multiple rolling friction parts to move radially within the multi-cavity planetary carrier. This causes part of the sidewalls of the multiple rolling friction parts to protrude from the multi-cavity planetary carrier and abut against the first and second outer rings, making the assembly of the reducer easier and avoiding the defects of difficult reducer assembly. Moreover, it reduces the setting of upper and lower end covers of the planetary carrier in the reducer, eliminating the need for connecting rods and laser welding to fix the upper and lower end covers to the planetary carrier, simplifying the installation process and saving installation costs. Furthermore, the drive shaft of the reducer abuts against the multiple rolling friction parts, thereby using friction transmission to output power. When the instantaneous impact is too large or the load is high, the power can be cut off by slippage, effectively preventing the motor from stalling and burning out. Compared with traditional planetary gear transmission, it can achieve better overload protection and avoid rigid impact damage such as gear collision damage.

[0011] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 A schematic diagram of the overall structure of a speed reducer provided in Embodiment 1 of this application is shown.

[0014] Figure 2 An exploded view of the speed reducer provided in Embodiment 1 of this application is shown.

[0015] Figure 3 A cross-sectional view of the speed reducer provided in Embodiment 1 of this application is shown.

[0016] Figure 4 A schematic diagram of the bearing provided in Embodiment 1 of this application being mounted on a multi-cavity planetary carrier is shown.

[0017] Figure 5 A schematic diagram of the structure of the multi-cavity planetary carrier provided in Embodiment 1 of this application is shown.

[0018] Figure 6A cross-sectional view of the multi-cavity planetary carrier provided in Embodiment 1 of this application is shown.

[0019] Figure 7 A top view of the rolling friction part provided in Embodiment 1 of this application is shown.

[0020] Figure 8 This diagram illustrates the connection between the assembly gasket and the rolling friction part provided in Embodiment 1 of this application.

[0021] Figure 9 A schematic diagram of the output section provided in Embodiment 1 of this application is shown.

[0022] Figure 10 A schematic diagram of the structure of the first outer ring provided in Embodiment 1 of this application is shown.

[0023] Figure 11 A schematic diagram of the structure of the second outer ring provided in Embodiment 1 of this application is shown.

[0024] Figure 12 A schematic diagram of the bearing housing provided in Embodiment 1 of this application is shown.

[0025] Figure 13 A schematic diagram of the overall structure of another speed reducer provided in Embodiment 2 of this application is shown.

[0026] Figure 14 An exploded view of a speed reducer provided in Embodiment 2 of this application is shown.

[0027] Figure 15 A schematic diagram of the structure of the multi-cavity planetary carrier provided in Embodiment 2 of this application is shown.

[0028] Icons: 1000, Reducer; 100, First Outer Ring; 110, Outer Edge; 200, Second Outer Ring; 300, Multi-Cavity Planetary Carrier; 310, Shaft Hole; 320, Partition Plate; 301, First Frame; 3011, First Mounting Chamber; 3012, First Slide Rail; 302, Second Frame; 3021, Second Mounting Chamber; 3022, Second Slide Rail; 400, Rolling Friction Part; 410, Mounting Shaft; 411, Mounting End; 420, First Rolling Element; 43 0. Second rolling element; 500. Assembly shim; 510. Slide groove; 520. Guide surface; 600. Output part; 610. Connecting turntable; 620. Output shaft; 700. Transmission part; 710. Input shaft; 711. Guide part; 712. Connecting part; 720. Coupling; 800. Bearing housing; 810. Ball bearing; 820. Washer; 2110. Third frame; 2111. Third mounting chamber; 2112. Third slide rail; 2200. Output outer ring. Detailed Implementation

[0029] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0031] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0032] The transmission mechanism of miniature electric cylinders usually uses planetary reducers. Traditional planetary reducers typically use planetary gears for transmission. Due to the small module of the gears, the tooth surface contact stress increases after the gear size is reduced, which can easily lead to accelerated tooth surface wear and affect the service life of the reducer.

[0033] Existing planetary reducers, under miniaturization conditions, have a more significant impact on transmission efficiency and accuracy due to gear machining errors. They also generate considerable noise and, during the miniaturization process, suffer from problems such as large size, complex structure, high production and processing costs, difficult assembly, and short service life.

[0034] Therefore, how to design a speed reducer that solves assembly difficulties and extends service life is a problem that urgently needs to be solved by those skilled in the art.

[0035] Based on this, the following embodiments of this application propose a speed reducer that is easy to install. Multiple rolling friction parts in the speed reducer are evenly distributed within a multi-cavity planetary carrier and are slidably connected to the multi-cavity planetary carrier. When the drive shaft is installed into the multi-cavity planetary carrier, one end of the drive part inserted into the multi-cavity planetary carrier abuts against the multiple rolling friction parts, squeezing them to move radially within the multi-cavity planetary carrier. This causes part of the sidewalls of the multiple rolling friction parts to protrude from the multi-cavity planetary carrier and abut against the first and second outer rings, making the assembly of the speed reducer easier and avoiding the defects of difficult speed reducer assembly. Furthermore, it reduces the need for upper and lower end covers on the planetary carrier in the speed reducer, eliminating the need for connecting rods and laser welding to fix the upper and lower end covers to the planetary carrier, simplifying the installation process and saving installation costs.

[0036] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0037] Example 1

[0038] As 1 to Figure 10 As shown, this embodiment proposes a speed reducer that is easy to install, has a differential effect, and achieves speed reduction and torque increase through friction transmission. The speed reducer 1000 includes: a first outer ring 100, a second outer ring 200 with an output end, a multi-cavity planetary carrier 300, multiple rolling friction parts 400, and a transmission part 700.

[0039] The first outer ring 100 and the second outer ring 200 are sleeved on the outside of the multi-cavity planetary carrier 300. The first outer ring 100 is fixed on the multi-cavity planetary carrier 300. Multiple rolling friction parts 400 are evenly distributed inside the multi-cavity planetary carrier 300 and are slidably connected to the multi-cavity planetary carrier 300.

[0040] The side of the multi-cavity planetary carrier 300 that is inserted away from the transmission part 700 is connected to the second outer ring 200 for transmission. One end of the transmission part 700 inserted into the multi-cavity planetary carrier 300 abuts against a plurality of rolling friction parts 400.

[0041] Specifically, the output end of the second outer ring 200 is the output section 600, which is connected to the second outer ring 200 and to the side of the multi-cavity planetary carrier 300 that is inserted away from the transmission section 700.

[0042] One end of the transmission unit 700 is located on the side of the multi-cavity planetary carrier 300 away from the output unit 600, and the other end is inserted into the multi-cavity planetary carrier 300 and abuts against a plurality of rolling friction parts 400 respectively, so that the transmission shaft squeezes the plurality of rolling friction parts to move radially within the multi-cavity planetary carrier, so that part of the sidewalls of the plurality of rolling friction parts are exposed from the multi-cavity planetary carrier and abut against the first outer ring and the second outer ring.

[0043] Among them, such as Figures 2 to 6As shown, the multi-cavity planetary carrier 300 includes: a partition plate 320, a first carrier body 301, and a second carrier body 302.

[0044] The first frame 301 and the second frame 302 are respectively disposed on both sides of the partition plate 320; the first outer ring 100 is fitted on the outside of the first frame 301, and the second outer ring 200 is fitted on the outside of the second frame 302; the first frame 301 is provided with a first slide rail 3012; the second frame 302 is provided with a second slide rail 3022.

[0045] Multiple rolling friction parts 400 are assembled in the first frame 301 and slidably connected to the first slide rail 3012; multiple rolling friction parts 400 are assembled in the second frame 302 and slidably connected to the second slide rail 3022.

[0046] Specifically, the rolling friction part 400 includes: a first rolling element 420 and a second rolling element 430.

[0047] In one embodiment, the first rolling element 420 and the second rolling element 430 are respectively needle roller bearings with different diameters. By setting the first rolling element 420 and the second rolling element 430 as needle roller bearings, rolling friction is achieved between the outer ring of the needle roller bearing and the first outer ring 100 and the second outer ring 200 through the rotation of the needle rollers. Compared with sliding friction, the contact surface wear is small, the service life is extended, and the temperature rise is more gradual, avoiding the problem of instantaneous high temperature. It has the advantages of smoother movement, higher precision, and reduced vibration and error.

[0048] A through partition plate 320, a first frame 301 and a second frame 302 shaft hole 310 are provided along the axis of the multi-cavity planetary carrier 300.

[0049] like Figure 5 As shown, the line connecting the centers of the shaft holes 310 respectively opened on the partition plate 320, the first frame 301 and the second frame 302 coincides with the axis L of the multi-cavity planetary carrier.

[0050] Side wall openings are formed on the side walls of the first frame 301 and the second frame 302, respectively, and the side wall openings are connected to the first slide rail 3012 and the second slide rail 3022, respectively.

[0051] Specifically, a first mounting chamber 3011 is formed between the first frame 301 and the partition plate 320, and a second mounting chamber 3021 is formed between the second frame 302 and the partition plate 320.

[0052] The first slide rail 3012 is formed on the circumferential side wall of the first frame 301 and communicates with the shaft hole 310 of the partition plate 320. Multiple first slide rails 3012 are provided and are evenly distributed radially along the first frame 301. Multiple first rolling elements 420 are respectively assembled into the first mounting chamber 3011 via the first slide rails 3012.

[0053] The second slide rail 3022 is formed on the circumferential side wall of the second frame 302 and communicates with the shaft hole of the second frame 302. Multiple second slide rails 3022 are provided and are evenly distributed radially along the second frame 302. Multiple second rolling elements 430 are respectively assembled into the second mounting chamber 3021 via the second slide rails 3022.

[0054] At least a portion of the outer wall of the first rolling element 420 is exposed from the first slide rail 3012 and abuts against the first outer ring 100; the drive shaft presses the plurality of first rolling elements 420 within the first frame to move radially within the first frame, causing a portion of the sidewalls of the plurality of first rolling elements 420 to be exposed within the first frame 301 and abut against the first outer ring 100.

[0055] At least a portion of the outer wall of the second rolling element 430 is exposed from the second slide rail 3022 and abuts against the second outer ring 200; the drive shaft presses the plurality of second rolling elements 430 within the second frame to move radially within the second frame, causing a portion of the sidewalls of the plurality of second rolling elements 430 to be exposed within the second frame 302 and abut against the second outer ring 200.

[0056] like Figure 7 As shown, in one embodiment, the diameter d1 of the first rolling element 420 is smaller than the diameter d2 of the second rolling element 430, and the diameter D1 of the covering surface formed by the inner wall of the first outer ring and the plurality of first rolling elements 420 is smaller than the diameter D2 of the covering surface formed by the inner wall of the second outer ring and the plurality of second rolling elements 430. Therefore, a size difference is formed between the inner diameter of the first outer ring and the inner diameter of the second outer ring. When the first outer ring is fixed, the rotation of the second outer ring drives the output shaft to rotate at a differential speed.

[0057] For example, the diameter of the first frame 301 is smaller than the diameter of the second frame 302. Correspondingly, the dimensions of the first slide rail 3012, the first mounting chamber 3011, and the first rolling element 420 are also smaller than the dimensions of the second slide rail 3022, the second mounting chamber 3021, and the second rolling element 430. Preferably, as shown... Figure 6 As shown, from a top-down view, multiple first slide rails 3012 and second slide rails 3022 are staggered to make the force more uniform.

[0058] In one embodiment, the number of the first rolling element 420 and the second rolling element 430 are each three, and the number of the first slide rail 3012 and the second slide rail 3022 are also correspondingly three. The difference in diameter between the first rolling element 420 and the second rolling element 430 is directly positively correlated with the transmission ratio. In other embodiments, the number of the first rolling element 420 and the second rolling element 430 can be increased to increase friction, thereby increasing the transmission force, enabling the system to withstand greater positive pressure, and improving system stability.

[0059] like Figure 7 and Figure 8 As shown, in order to enable the first rolling element 420 to slide in connection with the first slide rail 3012 and the second rolling element 430 to slide in connection with the second slide rail 3022, the rolling friction part 400 in the easy-to-install reducer proposed in this embodiment further includes: a mounting shaft 410 and a mounting shim 500.

[0060] Multiple first rolling elements 420 are respectively sleeved on the corresponding mounting shaft 410, and mounting shims 500 are installed at both ends of the mounting shaft 410. Multiple first rolling elements 420 are slidably connected to the first slide rail 3012 through the mounting shims 500.

[0061] Multiple second rolling elements 430 are respectively sleeved on the corresponding mounting shaft 410, and mounting shims 500 are respectively installed at both ends of the mounting shaft 410. The multiple second rolling elements 430 are slidably connected to the second slide rail 3022 through the mounting shims 500.

[0062] Furthermore, the mounting shim 500 is slidably connected to the mounting shaft 410. Specifically, to achieve this slidable connection between the mounting shim 500 and the mounting shaft 410, as follows: Figure 8 As shown, flat (elongated) mounting ends 411 are formed at both ends of the mounting shaft 410. The number of mounting shafts 410 corresponds one-to-one with the number of first rolling elements 420 and second rolling elements 430. The first rolling element 420 is sleeved on the corresponding mounting shaft 410, and the second rolling element 430 is sleeved on the corresponding mounting shaft 410.

[0063] The assembly shim 500 has a groove 510, and the mounting end 411 of the mounting shaft 410 is embedded in the groove 510 and slidably connected with the groove 510; so that the assembly shim 500 is slidably connected with the first rolling element 420 and the second rolling element 430 respectively, and the first rolling element 420 and the second rolling element 430 can slide in the groove 510 provided in the assembly shim 500.

[0064] The mounting shim 500 also has guide surfaces 520 on both sides for easy installation. After the rolling friction part 400 and the mounting shim 500 are pre-installed, they are assembled into the multi-cavity planetary carrier 300 through the first slide rail 3012 and / or the second slide rail 3022.

[0065] The assembly shim 500 is designed for mounting the first rolling element 420 and the second rolling element 430. The assembly shim 500 is provided with a sliding groove 510, which facilitates the installation of the first rolling element 420 and the second rolling element 430. When installing the drive shaft, the first rolling element 420 and the second rolling element 430 can slide in the sliding groove 510, which further facilitates the installation of the drive shaft.

[0066] Specifically, such as Figure 8 As shown, the transmission unit 700 includes an input shaft 710 and a coupling 720. The input shaft 710 is inserted into the multi-cavity planetary carrier 300 through the shaft hole 310. A guide portion 711 is provided at one end of the input shaft 710 inserted into the multi-cavity planetary carrier 300. The guide portion 711 is chamfered at the insertion end of the input shaft 710 to guide it, so that the input shaft 710 is interference-fitted with the first rolling element 420 and the second rolling element 430 through the guide portion 711, thereby facilitating installation. A connecting portion 712 is formed at the other end of the input shaft 710. The input shaft 710 is flat and connected to the coupling 720 through the connecting portion 712. The coupling 720 is located on the side of the multi-cavity planetary carrier 300 away from the output unit 600.

[0067] The easy-to-install reducer 1000 proposed in this embodiment also includes: a bearing housing 800, including: a ball bearing 810 and a washer 820. The ball bearing 810 is sleeved on the outside of the output part 600 and disposed in the bearing housing 800. Washers 820 are respectively provided at both ends of the ball bearing 810.

[0068] like Figure 9 As shown, the output unit 600 includes a connecting turntable 610 and an output shaft 620. The connecting turntable 610 is connected and fixed to the second outer ring 200 and rotates with the second outer ring 200. The output shaft 620 is disposed on one side of the connecting turntable 610 along the axis L, and the output shaft 620 and the connecting turntable 610 are integrally formed. A ball bearing 810 is sleeved on the outside of the output shaft 620. The connecting turntable 610 abuts against the washer 820 to adjust the gap with the ball bearing 810 and ensure the operating accuracy.

[0069] like Figure 10 and Figure 11As shown, a protruding outer edge 110 is formed on the side of the first outer ring 100 away from the top of the second outer ring 200. This extension is used to fix the first outer ring 100 to the housing and / or other external mechanisms of the reducer 1000. It can be understood that since the diameter of the first frame 301 is smaller than the diameter of the second frame 302, and the second outer ring 200 rotates through friction transmission via the second rolling element 430, and the first outer ring 100 is fixed by the outer edge 110, the wall thickness of the first outer ring 100 is greater than the wall thickness of the second outer ring 200. This ensures that when the first outer ring 100 and the second outer ring 200 are fitted onto the multi-cavity planetary carrier 300, the first outer ring 100 is fixed to the external housing / slot, and the second outer ring 200 can rotate. The rotation of the second outer ring 200 drives the connecting turntable 610 to rotate, thereby causing the output shaft 620 to rotate.

[0070] During the installation process, the input shaft 710 is installed last and is assembled using an interference fit, which makes installation difficult. In addition, due to the small size of the components and the high processing cost, the original installation steps are too numerous and the installation is cumbersome. Therefore, the reducer 1000 proposed in this embodiment adjusts the structure of the multi-cavity planetary carrier 300 to reduce the number of installation steps and components.

[0071] The installation steps of the reducer 1000 proposed in this embodiment are as follows: steps S1 to S4:

[0072] S1: Install multiple first rolling elements 420 and second rolling elements 430 onto the corresponding mounting shafts 410 respectively, and install multiple assembly shims 500 onto both ends of the mounting shafts 410 of the first rolling elements 420 and second rolling elements 430 respectively, thus completing the pre-installation step of the rolling friction part 400.

[0073] S2: The pre-installed rolling friction part 400 is installed into the multi-cavity planetary carrier 300 through the first slide rail 3012 and the second slide rail 3022. The first rolling element 420 is installed in the first mounting chamber 3011 through the first slide rail 3012, and the second rolling element 430 is installed in the second mounting chamber 3021 through the second slide rail 3022, thus completing the installation steps of the multi-cavity planetary carrier 300.

[0074] S3: Connect the connecting turntable 610 of the output section 600 to the second outer ring 200, fit the second outer ring 200 onto the second frame 302, fit the first outer ring 100 onto the first frame 301, and install the input shaft 710 into the multi-cavity planetary carrier 300 to complete the installation steps of the differential friction reducer 1000 body.

[0075] S4: Install the ball bearing 810 into the bearing housing 800, and install the bearing washers 410 on both sides of the ball bearing 810 to complete the assembly.

[0076] The working principle of the speed reducer proposed in this embodiment is as follows:

[0077] like Figures 1 to 12 As shown, the output end of the external motor is connected to the input shaft 710 via a coupling 720, causing the input shaft 710 to rotate. The input shaft 710 is inserted into the multi-cavity planetary carrier 300 and is interference-fitted with the first rolling element 420 and the second rolling element 430 respectively. The first rolling element 420 is mounted on the first carrier 301 and abuts against the first outer ring 100. The second rolling element 430 is mounted on the second carrier 302 and abuts against the second outer ring 200. By making the diameter of the first rolling element 420 smaller than the diameter of the second rolling element 430, the rotational speed of the second rolling element 430 is different from that of the first rolling element 420. The friction between the second rolling element 430 and the second outer ring 200 transmits the speed difference, causing the second outer ring 200 to rotate. The second outer ring 200 is connected and fixed to the connecting turntable 610 of the output part 600, causing the output shaft 620, which is located at the bottom of the connecting turntable 610 and is integrally formed, to rotate.

[0078] The easy-to-install speed reducer proposed in this embodiment has the following characteristics:

[0079] The side mounting of needle roller bearings reduces the installation process. Compared to the previous method, it eliminates the need for upper and lower end covers. Previously, the upper and lower end covers and planetary carriers required connecting rods to fix them together, and the connecting holes between the connecting rods and the end covers were laser-welded, making installation complex. This improved solution omits these steps, saving installation costs. Furthermore, through friction transmission, power can be cut off by slippage when there is excessive instantaneous impact or high load, effectively preventing motor stall and burnout. Compared to traditional planetary gear transmission, it effectively avoids rigid impact damage such as gear collisions, achieving better overload protection.

[0080] Example 2

[0081] The structure and connection relationship of the multi-cavity planetary carrier 300 and the second outer ring 200 in the reducer proposed in Embodiment 1 above are adjusted to improve the stability and applicability of the reducer 1000 function.

[0082] As a variation of the aforementioned reducer 1000, the following is combined with Figures 13 to 15 To describe another speed reducer proposed in this embodiment.

[0083] like Figures 13 to 15 As shown, in another easy-to-install reducer proposed in this embodiment, the multi-cavity planetary carrier 300 further includes a third carrier 2110 that is the same as the first carrier 301.

[0084] The third frame 2110 is located at the end of the second frame 302 away from the first frame 301; the outer side of the third frame 2110 is fitted with a first outer ring 100, and the third frame 2110 is provided with a third slide rail 2112.

[0085] Multiple first rolling elements 420 are assembled inside the third frame 2110 and slidably connected to the third slide rail 2112.

[0086] like Figure 14 As shown, the diameter of the third frame 2110 is the same as that of the first frame 301. The third frame 2110 also has a third mounting chamber 2111 and a third slide rail 2112. The three first rolling elements 420 are slidably mounted in the third mounting chamber 2111 through the third slide rail 2112.

[0087] Here, the structure of the third mounting chamber 2111 is similar to that of the first mounting chamber 3011 described above, and will not be described again here. The structure of the third slide rail 2112 is similar to that of the first slide rail 3012 described above, and will not be described again here.

[0088] Similarly, the drive shaft presses multiple first rolling elements 420 within the third frame 2110 to move radially, causing a portion of the sidewalls of the multiple first rolling elements 420 to protrude from the first frame and abut against the first outer ring 100 fitted on the outer side of the third frame 2110.

[0089] The easy-to-install reducer proposed in this embodiment also includes: an output outer ring 2200 that replaces the second outer ring 200.

[0090] The output outer ring 2200 is sleeved on the outside of the second frame 302 and abuts against the two first outer rings 100 respectively. The output outer ring 2200 and the second rolling element 430 are driven by friction. The output outer ring 2200 is connected to the external components to output the power of the reducer and prevent axial movement.

[0091] In one embodiment, the outer wall of the output outer ring 2200 is a polygonal outer wall. The polygonal outer wall of the output outer ring 2200 facilitates connection with other external components for power output.

[0092] Optionally, bearings are provided at the positions where the two first outer rings 100 abut against the output outer ring 2200 to fix the two first outer rings 100.

[0093] It is understood that in this embodiment, there are two first outer rings 100, which are respectively fitted onto the outer sides of the first frame 301 and the third frame 2110. The first outer rings 100 at both ends are fixed and the power is transmitted through the rotation of the output outer ring 2200. The output is carried out through the output outer ring 2200 located in the middle. The first outer rings 100 at both ends are fixed, which makes the centering of the reducer better. The output outer ring 2200 is fixed by the two first outer rings 100, which has a good centering and alignment effect. This reduces the cantilever effect generated by the support of the bearing seat 800 and the rolling element in Embodiment 1, and greatly improves the rigidity and stability of the system.

[0094] In summary, this application proposes a speed reducer that is easy to install. Multiple rolling friction parts are evenly distributed within a multi-cavity planetary carrier and slidably connected to it. When the drive shaft is installed into the multi-cavity planetary carrier, one end of the drive unit inserted into the carrier abuts against the multiple rolling friction parts, forcing them to move radially within the carrier. This causes some sidewalls of the rolling friction parts to protrude from the carrier and abut against the first and second outer rings, making the speed reducer assembly easier and avoiding the difficulties associated with assembly. Furthermore, it reduces the reduction speed... The design of the upper and lower end covers of the planetary carrier eliminates the need for connecting rods and laser welding to fix the upper and lower end covers to the planetary carrier, simplifying the installation process and saving installation costs. Furthermore, the reducer's drive shaft abuts against multiple rolling friction parts, thus using friction transmission for power output. When the instantaneous impact is too large or the load is high, the power can be cut off by slippage, effectively preventing the motor from stalling and burning out. Compared with traditional planetary gear transmission, it can achieve better overload protection and avoid rigid impact damage such as gear collision damage.

[0095] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A speed reducer that is easy to install, characterized by include: A first outer ring, a second outer ring with an output end, a multi-cavity planetary carrier, multiple rolling friction parts, and a transmission part; The first outer ring and the second outer ring are sleeved on the outside of the multi-cavity planetary carrier. The first outer ring is fixed on the multi-cavity planetary carrier. Multiple rolling friction parts are evenly distributed inside the multi-cavity planetary carrier and are slidably connected to the multi-cavity planetary carrier. The side of the multi-cavity planetary carrier furthest from the drive unit is connected to the second outer ring drive. One end of the transmission unit, inserted into the multi-cavity planetary carrier, abuts against multiple rolling friction parts.

2. The easy-to-install speed reducer according to claim 1, characterized in that, The multi-cavity planetary carrier includes: a partition plate, a first carrier body, and a second carrier body; The first frame and the second frame are respectively installed on both sides of the partition plate; the first outer ring is fitted onto the outside of the first frame, and the second outer ring is fitted onto the outside of the second frame; the first frame is provided with a first slide rail; the second frame is provided with a second slide rail. Multiple rolling friction parts are assembled in the first frame and slidably connected to the first slide rail; multiple rolling friction parts are assembled in the second frame and slidably connected to the second slide rail.

3. The easy-to-install speed reducer according to claim 2, characterized in that, A through-hole is provided along the axis of the multi-cavity planetary carrier, connecting the partition plate, the first carrier body, and the second carrier body; The first frame and the second frame have side wall openings respectively, and the side wall openings are connected to the first slide rail and the second slide rail respectively; The first slide is located on the circumferential side wall of the first frame and is connected to the shaft hole of the partition plate; The second slide is located on the circumferential side wall of the second frame and is connected to the shaft hole of the second frame.

4. The ease-of-installation speed reducer of claim 3, wherein The rolling friction part includes: a first rolling element and a second rolling element; At least a portion of the outer wall of the first rolling element protrudes from the first slide rail and abuts against the first outer ring; At least a portion of the outer wall of the second rolling element protrudes from the second slide and abuts against the second outer ring.

5. The ease-of-installation speed reducer of claim 4, wherein The rolling friction part also includes: a mounting shaft and a mounting shim; Multiple first rolling elements are respectively sleeved on corresponding mounting shafts, and assembly shims are installed at both ends of the mounting shafts. The multiple first rolling elements are slidably connected to the first slide rails through the assembly shims. Multiple second rolling elements are respectively fitted onto corresponding mounting shafts, and mounting shims are installed at both ends of the mounting shafts. The multiple second rolling elements are slidably connected to the second slide rails through the mounting shims.

6. The ease-of-installation speed reducer of claim 5, wherein The assembly shim is slidably connected to the mounting shaft.

7. The ease-of-installation speed reducer of claim 6, wherein The two ends of the mounting shaft are respectively formed as mounting ends; the mounting shim is provided with a sliding groove; The mounting end of the mounting shaft is embedded in the slide groove and is slidably connected to the slide groove.

8. The ease-of-installation speed reducer of claim 4, wherein The multi-cavity planetary carrier also includes a third carrier identical to the first carrier; The third frame is located at the end of the second frame that is away from the first frame; the outer side of the third frame is fitted with a first outer ring, and the third frame is provided with a third slide rail; Multiple first rolling elements are assembled in the third frame and slidably connected to the third slide rail.

9. The easy-to-install speed reducer of claim 8, wherein Also includes: Output outer ring; The output outer ring is fitted onto the outside of the second frame and abuts against the two first outer rings respectively. The output outer ring is driven by friction with the second rolling element. The output outer ring is connected to external components to output the power of the reducer.

10. The easy-to-install speed reducer according to claim 9, characterized in that, Bearings are installed at the positions where the two first outer rings abut against the output outer ring to fix the two first outer rings.

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