speed reducer

Abstract

The utility model discloses a speed reducer relates to the technical field of speed reducer, wherein, the speed reducer includes the casing, installs the first planetary gear train component in casing, first reduction component, input part, output part, the first planetary gear train component includes the first planet carrier, first planetary gear, first sun gear, and the first planet carrier is fixed in casing, and the first reduction component includes the first transmission gear part of phase transmission, second transmission gear part, wherein the first transmission gear part is connected with one of first planetary gear and first sun gear, and the input part is connected with another, and the output part is connected with second transmission gear part. The utility model provides technical scheme can solve the problem that multistage speed reducer has relatively big structure.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer technology, and in particular to a speed reducer. Background Technology

[0002] A speed reducer, also known as a gearbox, is a power transmission mechanism that uses gears to reduce the speed of a motor while increasing its output torque. Speed ​​reducers are widely used in various mechanical equipment to meet the speed and torque requirements of different applications.

[0003] Currently, speed reducers use multi-stage reduction structures to adjust torque and speed, but this multi-stage reduction structure leads to a larger size of the speed reducer. Utility Model Content

[0004] In order to solve the problem of large structure of the above-mentioned multi-stage reducers, the purpose of this utility model is to propose a reducer.

[0005] To achieve the above objectives, the speed reducer proposed in this utility model includes a housing, a first planetary gear train assembly mounted on the housing, a first speed reduction assembly, an input section, and an output section;

[0006] The first planetary gear train assembly includes a first planet carrier, a first planet gear, and a first sun gear, wherein the first planet carrier is fixed to the housing;

[0007] The first reduction gear includes a first transmission gear and a second transmission gear, wherein the first transmission gear is connected to one of the first planetary gear and the first sun gear, the input part is connected to the other, and the output part is connected to the second transmission gear.

[0008] In one embodiment, multiple first planetary gears are provided, and the first transmission gear is connected to multiple first planetary gears;

[0009] The input section is connected to the first sun gear.

[0010] In one embodiment, the reducer further includes a transmission component for mounting a first transmission gear and a plurality of first planetary gears, wherein the plurality of first planetary gears can drive the first transmission gear to rotate via the transmission component.

[0011] In one embodiment, both the first transmission gear and the second transmission gear are configured as bevel gears.

[0012] In one embodiment, the housing is provided with a mounting cavity, the first transmission gear and the second transmission gear mesh with each other, wherein the meshing position is located in the mounting cavity, and a lubrication cavity is constructed within the mounting cavity, the lubrication cavity being filled with lubricant.

[0013] In one embodiment, the mounting cavity is provided with a first protrusion for reducing the volume of the lubrication cavity.

[0014] In one embodiment, the mounting cavity has a first opening, and the reducer includes a sealing cover fixed to the first opening, with the first protrusion formed on the sealing cover.

[0015] In one embodiment, the mounting cavity is provided with a second cavity opening, the reducer includes a first mounting bracket, the first mounting bracket is fixed to the housing by a detachable structure, the first planetary gear train assembly is mounted on the first mounting bracket, and the first transmission gear is mounted on the first mounting bracket.

[0016] In one embodiment, the reducer further includes a second mounting bracket for power supply mounting, and the input section is mounted on the second mounting bracket;

[0017] Alternatively, the mounting cavity is provided with a second protrusion, and the second transmission gear is mounted in the mounting cavity through a first bearing member, wherein two first bearing members are configured and respectively located on opposite sides of the second protrusion, and the second transmission gear abuts against the end face of one of the first bearing members;

[0018] The output section is fixed to the second transmission gear section by a detachable structure and abuts against the end face of another first bearing member.

[0019] The reducer further includes a second planetary gear train assembly, wherein the second planetary gear train assembly is connected in series with the first planetary gear train assembly, and the first planetary gear train assembly is connected to the first transmission gear section or the input section through the second planetary gear train assembly.

[0020] The technical solution of this utility model adopts a first planetary gear train assembly as one of the multi-stage reduction structures of the reducer, and the first planetary carrier is fixed on the housing. According to the characteristics of the first planetary gear train, it can be seen that the first sun gear and the first planet gear are both located inside the first planetary carrier. At this time, the outer side of the first planetary carrier can be used as part of the housing, so there is no need to set another housing outside the first planetary gear train assembly to cover and protect the first planetary gear train assembly. This makes the housing as compact as possible, and thus the structure of the reducer can also be more compact, thereby solving the problem of large structure in the existing multi-stage reducers. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of a structure of an embodiment of the speed reducer provided by this utility model;

[0023] Figure 2 for Figure 1 Schematic diagram of the internal structure of the speed reducer;

[0024] Figure 3 This is a schematic diagram of the first planetary gear train assembly and the second planetary gear train assembly connected in series in the speed reducer provided by this utility model.

[0025] Explanation of icon numbers:

[0026] 100, Housing; 110, Mounting cavity; 120, First protrusion; 130, Sealing cover; 130, Second protrusion; 200, First planetary gear train assembly; 210, First planet carrier; 220, First sun gear; 230, First planet gear; 300, First reduction assembly; 310, First transmission gear; 320, Second transmission gear; 400, Input section; 500, Output section; 600, Transmission component; 610, Fourth protrusion; 620, Fifth protrusion; 700, First mounting bracket; 710, Third protrusion; 800, Second mounting bracket; 900, First bearing component; 1000, Second bearing component; 1100, Second planetary gear train assembly; 1110, Second planet carrier; 1120, Second sun gear; 1130, Second planet gear.

[0027] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0029] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0030] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0031] This utility model proposes a speed reducer.

[0032] Please see Figure 1 , Figure 2In one embodiment of this utility model, the reducer includes a housing 100, a first planetary gear 230 system assembly 200 mounted on the housing 100, a first reduction assembly 300, an input section 400, and an output section 500. The input section 400 is used for connecting to the output end of a motor or other power sources, and the output section 500 is used for outputting power externally. Further, the first planetary gear 230 system assembly 200 includes a first planet carrier 210, first planetary gears 230, and a first sun gear 220, with the first planet carrier 210 fixed to the housing 100. The first reduction assembly 300 includes a first transmission gear 310 and a second transmission gear 320 for phase transmission. Phase transmission can be understood as direct transmission or indirect transmission. For direct transmission, the first transmission gear 310 and the second transmission gear 320 mesh; for indirect transmission, the first transmission gear 310 and the second transmission gear 320 achieve indirect transmission through other structures, such as chains or synchronous belts. In some embodiments, the first transmission gear 310 and the second transmission gear 320 may employ a spur gear structure, a helical gear structure, a worm gear, or a turbine, etc. Further, the first transmission gear 310 is connected to one of the first planetary gear 230 and the first sun gear 220, the input section 400 is connected to the other, and the output section 500 is connected to the second transmission gear 320. It is understood that in some embodiments, the first planetary gear 230 can be connected to the first transmission gear 310, in which case the first sun gear 220 is connected to the input section 400, and the input section 400 drives the first sun gear 220. As the sun gear 220 rotates, the first planetary carrier 210, fixed to the housing 100, allows the first planetary gear 230, meshing with the first sun gear 220, to rotate around it. This rotation drives the first transmission gear 310 to rotate. The rotation of the first transmission gear 310 then drives the rotation of the second transmission gear 320, which in turn drives the output unit 500 to rotate. Once the output unit 500 rotates, the torque input from the input end is transmitted to the output unit 500 via the first planetary gear 230 system assembly 200 and the first reduction assembly 300, and then output outwards from the output unit 500. Further, in some embodiments, the output unit 500 can serve as a mounting part for other structures.

[0033] It is understandable that when it is necessary to adjust the torque and speed output by the output unit 500, the transmission ratio in the first planetary gear 230 series assembly 200 and the first reduction assembly 300 can be adjusted to achieve the adjustment of the torque and speed output by the output unit 500. It is also understandable that this embodiment uses the first planetary gear 230 series assembly 200 as one of the multi-stage reduction structures of the reducer, and the first planetary carrier 210 is fixed to the housing 100. Based on the characteristics of the first planetary gear 230 series, it is known that the first sun gear 220 and the first planetary gears 230 are both located inside the first planetary carrier 210. In this case, the outer side of the first planetary carrier 210 can serve as part of the housing 100, thus eliminating the need for another housing 100 to cover and protect the first planetary gear 230 series assembly 200. This makes the housing 100 as compact as possible, resulting in a more compact reducer structure, thereby solving the problem of large structures in existing multi-stage reducers.

[0034] In one embodiment, reference Figure 2 The system comprises multiple first planetary gears 230, with the first transmission gear 310 connected to each of the multiple first planetary gears 230. The input section 400 is connected to the first sun gear 220. Furthermore, the design of multiple first planetary gears 230 allows for a more even distribution of input torque across each first planetary gear 230. This not only improves the load-bearing capacity of the entire first planetary gear system 200 but also reduces wear on individual gears, extending their service life. Furthermore, although the number of first planetary gears 230 is increased, the compactness of the first planetary gear system 200 itself allows for efficient use of limited space and high-efficiency power transmission. Furthermore, in some embodiments, three first planetary gears 230 are configured, where each first planetary gear 230 can be directly rotatably mounted on the first transmission gear 310. Specifically, the first transmission gear 310 has three shafts for mounting the first planetary gears 230.

[0035] In one embodiment, reference Figure 2 The reducer further includes a transmission component 600, which is used to mount the first transmission gear 310 and a plurality of first planetary gears 230. The plurality of first planetary gears 230 can drive the first transmission gear 310 to rotate through the transmission component 600. In this embodiment, the transmission component 600 is rotatably mounted on the housing 100, wherein the transmission component 600 and the first transmission gear 310 can be inserted into each other and are connected by a key connection.

[0036] In one embodiment, reference Figure 2Both the first transmission gear 310 and the second transmission gear 320 are configured as bevel gears. This means that when bevel gears are used for transmission, the output direction of torque can be changed, further improving the application scenarios of the reducer.

[0037] In one embodiment, reference Figure 2 The housing 100 is provided with a mounting cavity 110, and the first transmission tooth 310 and the second transmission tooth 320 mesh with each other, wherein the meshing position is located in the mounting cavity 110. A lubrication cavity is constructed inside the mounting cavity 110, and the lubrication cavity is filled with lubricant. It can be understood that under the action of lubricant, the friction at the meshing point between the first transmission tooth 310 and the second transmission tooth 320 can be reduced, making the transmission more efficient. At the same time, the lubrication cavity is a part of the structure of the mounting cavity 110.

[0038] In one embodiment, reference Figure 2 The mounting cavity 110 is provided with a first protrusion 120 for reducing the volume of the lubrication cavity. It should be noted that when the first transmission gear 310 and the second transmission gear 320 are configured as bevel gears, the space size of the lubrication cavity will be large due to the positional limitation of the first transmission gear 310 and the second transmission gear 320. In order to avoid waste caused by excessive lubricant, the first protrusion 120 is provided in the mounting cavity 110 to reduce the volume of the lubrication cavity, thereby reducing the volume of lubricant injected into the lubrication cavity and avoiding waste caused by excessive lubricant injection.

[0039] In one embodiment, reference Figure 2 The mounting cavity 110 has a first cavity opening, and the reducer includes a sealing cover 130 fixed to the first cavity opening. The first protrusion 120 is formed on the sealing cover 130. The sealing cover 130 is fixed to the first cavity opening by a detachable structure. When it is necessary to inject lubricant into the lubrication cavity, the sealing cover 130 can be opened, and lubricant can be injected into the lubrication cavity through the first cavity opening. However, this design is not limited to this. In some embodiments, the sealing cover 130 can be fixed to the first cavity opening by welding.

[0040] In one embodiment, reference Figure 2The mounting cavity 110 is provided with a second cavity opening. The reducer includes a first mounting bracket 700, which is detachably fixed to the housing 100. The first planetary gear 230 assembly 200 is mounted on the first mounting bracket 700, and the first transmission gear 310 is mounted on the first mounting bracket 700. The first mounting bracket 700 can be fixed to the housing 100 by screws. It should be noted that in some embodiments, the first mounting bracket 700 is provided with a third protrusion 710, and the first transmission gear 310 is mounted to the first mounting bracket 700 by two second bearing members 1000, which are respectively located on opposite sides of the third protrusion 710. Furthermore, in some embodiments, when the reducer includes a transmission member 600, the transmission member 600 is mounted on the first mounting bracket 700 via two second bearing members 1000; further, the transmission member 600 is threadedly connected to a fourth protrusion 610, which can restrict one of the second bearing members 1000 to the third protrusion 710; further, the transmission member 600 is also provided with a fifth protrusion 620, which can restrict another second bearing member 1000 to the third protrusion 710. 10; Further, the first planetary carrier 210 in the first planetary gear 230 series assembly 200 is fixed to the first mounting bracket 700 by screws, and the first planetary gear 230 is mounted on the transmission member 600. Since the first planetary carrier 210 is fixed to the first mounting bracket 700, the first planetary carrier 210 can restrict the transmission member 600 to the first mounting bracket 700 through the first planetary gear 230, thereby enabling the fifth protrusion 620 to restrict the other second bearing member 1000 to the third protrusion 710. With the above structure, it is convenient to assemble and disassemble the first planetary gear 230 series assembly 200 and the first transmission gear 310; it can be understood that when it is necessary to disassemble the first transmission gear 310 and the first planetary gear 230 series assembly 200, it is only necessary to remove the first mounting bracket 700 from the housing 100. Meanwhile, during assembly, the first transmission gear 310 and the first planetary gear 230 series assembly 200 can be installed on the first mounting bracket 700 first, and then the first mounting bracket 700 together with the first transmission gear 310 and the first planetary gear 230 series assembly 200 can be assembled on the housing 100.

[0041] In one embodiment, reference Figure 2The reducer also includes a second mounting bracket 800, which is used for mounting the motor. The input unit 400 is mounted on the second mounting bracket 800. It is understood that the second mounting bracket 800 has a mounting position for mounting the motor, facilitating the assembly of the motor and the reducer, and making it easy for the motor's output end to connect to the input unit 400. However, this design is not limited to this. In some embodiments, the second mounting bracket 800 can also be used for mounting other power transmission structures, which transmit power to the input unit 400.

[0042] In one embodiment, reference Figure 2 The mounting cavity 110 is provided with a second protrusion 130. The second transmission gear 320 is mounted in the mounting cavity 110 via a first bearing member 900. Two first bearing members 900 are configured and respectively located on opposite sides of the second protrusion 130. The second transmission gear 320 abuts against the end face of one of the first bearing members 900. The output part 500 is detachably fixed to the second transmission gear 320 and abuts against the end face of the other first bearing member 900. In this embodiment, two first bearing members 900 are respectively disposed on opposite sides of the second protrusion 130 and abut against the second protrusion 130. When the second transmission gear 320, the output part 500, and the two second bearing members 1000 are installed in the mounting cavity 110, the two second bearing members 1000 can be confined in the mounting cavity 110 by the second transmission gear 320 and the output part 500, and the second transmission gear 320 is also confined in the mounting cavity 110 by the action of the two second bearing members 1000. Furthermore, in order to ensure sealing, a sealing ring is provided between the output part 500 and the mounting cavity 110.

[0043] Furthermore, in some embodiments, reference is made to... Figure 3The reducer further includes a second planetary gear train assembly 1100, wherein the second planetary gear train assembly 1100 is connected in series with the first planetary gear train assembly 200, and the first planetary gear train assembly 200 is connected to the first transmission gear 310 through the second planetary gear train assembly 1100. It should be noted that the series connection refers to the power being connected in series, that is, the power of the first planetary gear train assembly 200 can be transmitted to the second planetary gear train assembly 1100, or the power of the second planetary gear train assembly 1100 can be transmitted to the first planetary gear train assembly 200. Further, it can be understood that the second planetary gear train assembly 1100 includes a second planet carrier 1110, a second planetary gear 1130, and a second sun gear 1120. Furthermore, this embodiment provides a connection method in which the first planetary gear 230 system assembly 200 and the second planetary gear system assembly 1100 are connected in series. The first planetary carrier 210 and the second planetary carrier 1110 are fixed together by screws. Then, the second planetary carrier 1110 is fixed on the housing 100. At this time, the input part 400 is connected to the first sun gear 220, and the first planetary gear 230 is connected to the second planetary gear 1130. Specifically, the input part 400 is connected to the first sun gear 220, the first transmission gear part 310 is connected to the second sun gear 1120, and the first planetary gear 230 and the second planetary gear 1130 are connected by a rotating shaft. In order to restrict the first planetary gear 230 and the second planetary gear 1130 on the rotating shaft, the rotating shaft can be a stepped shaft, or a structure such as a snap ring can be used to limit the first planetary gear 230 and the second planetary gear 1130. Specifically, the input unit 400 drives the first sun gear 220 to rotate, and the first sun gear 220 drives the first planet gear 230 to drive the transmission. Under the action of the rotating shaft, when the first planet gear 230 rotates around the first sun gear 220, it can synchronously drive the second planet gear 1130 to rotate. When the second planet gear 1130 rotates, it can drive the second sun gear 1120 to rotate. The rotation of the second sun gear 1120 in turn drives the first transmission gear 310 to rotate.

[0044] Similarly, during use (not shown), the input unit 400 can also be connected to the first planetary gear 230. It should be noted that when the input unit 400 is connected to the first planetary gear 230, the first sun gear 220 and the second sun gear 1120 can rotate coaxially, and the second planetary gear 1130 is connected to the first transmission gear 310. Specifically, the input unit 400 drives the first planetary gear 230 to rotate. While the first planetary gear 230 rotates around the first sun gear 220, it can also drive the first sun gear 220 to rotate. When the first sun gear 220 rotates, it can coaxially drive the second sun gear 1120 to rotate. When the second sun gear 1120 rotates, it can drive the second planetary gear 1130 to rotate. When the second planetary gear 1130 rotates, it can drive the first transmission gear 310 to rotate.

[0045] However, this design is not limited to this. In some embodiments (not shown), the first planetary gear 230 system assembly 200 is connected to the input part 400 through the second planetary gear system assembly 1100. For the specific connection method, refer to the first planetary gear 230 system assembly 200 being connected to the first transmission gear part 310 through the second planetary gear system assembly 1100.

[0046] However, this design is not limited to this. In some embodiments, the reducer also includes a third planetary gear train assembly (not shown), wherein the third planetary gear train assembly is connected in series with the first planetary gear 230 series assembly 200 and the second planetary gear train assembly 1100. For the specific series connection method, refer to the series connection method of the first planetary gear 230 series assembly 200 and the second planetary gear train assembly 1100.

[0047] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. A speed reducer, characterized in that, Includes a housing, a first planetary gear train assembly mounted on the housing, a first reduction assembly, an input section, and an output section; The first planetary gear train assembly includes a first planet carrier, a first planet gear, and a first sun gear, wherein the first planet carrier is fixed to the housing; The first reduction gear assembly includes a first transmission gear and a second transmission gear, wherein the first transmission gear is connected to one of the first planetary gear and the first sun gear, the input part is connected to the other, and the output part is connected to the second transmission gear.

2. The speed reducer as described in claim 1, characterized in that, The first planetary gear is provided in multiple ways, and the first transmission gear is connected to the multiple first planetary gears; The input section is connected to the first sun gear.

3. The speed reducer as described in claim 2, characterized in that, The reducer also includes a transmission component for mounting a first transmission gear and a plurality of first planetary gears, wherein the plurality of first planetary gears can drive the first transmission gear to rotate via the transmission component.

4. The speed reducer as described in claim 1, characterized in that, Both the first transmission gear and the second transmission gear are configured as bevel gears.

5. The speed reducer as described in claim 4, characterized in that, The housing is provided with a mounting cavity, and the first transmission gear and the second transmission gear mesh with each other, wherein the meshing position is located in the mounting cavity, and a lubrication cavity is constructed inside the mounting cavity, and the lubrication cavity is filled with lubricant.

6. The speed reducer as described in claim 5, characterized in that, The mounting cavity is provided with a first protrusion for reducing the volume of the lubrication cavity.

7. The speed reducer as described in claim 6, characterized in that, The mounting cavity has a first opening, and the reducer includes a sealing cover fixed to the first opening, with the first protrusion formed on the sealing cover.

8. The speed reducer as described in claim 5, characterized in that, The mounting cavity is provided with a second cavity opening. The reducer includes a first mounting frame, which is fixed to the housing by a detachable structure. The first planetary gear train assembly is mounted on the first mounting frame, and the first transmission gear is mounted on the first mounting frame.

9. The speed reducer as described in claim 8, characterized in that, The reducer also includes a second mounting bracket, which is used for power supply mounting, and the input part is mounted on the second mounting bracket; Alternatively, the mounting cavity is provided with a second protrusion, and the second transmission gear is mounted in the mounting cavity through a first bearing member, wherein two first bearing members are configured and respectively located on opposite sides of the second protrusion, and the second transmission gear abuts against the end face of one of the first bearing members; The output section is fixed to the second transmission gear section by a detachable structure and abuts against the end face of another first bearing member.

10. The speed reducer as described in claim 1, characterized in that, The reducer further includes a second planetary gear train assembly, wherein the second planetary gear train assembly is connected in series with the first planetary gear train assembly, and the first planetary gear train assembly is connected to the first transmission gear section or the input section through the second planetary gear train assembly.

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