speed reducer

Abstract

The utility model discloses a speed reducer relates to speed reducer technical field, wherein, speed reducer includes: seat body, first reduction subassembly, input part, output part, the seat body is equipped with installation cavity, the first axle part of integrative forming in installation cavity, first reduction subassembly includes the ring surface envelope worm part of installation in installation cavity, the bevel gear portion of the sleeve of first axle part, ring surface envelope worm part with bevel gear portion is engaged, input part drive connection ring surface envelope worm part, bevel gear portion drive connection output part. The utility model provides technical scheme can solve the problem of low assembly efficiency of speed reducer.

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] Current speed reducers use worm gears and helical gears as reduction structures to adjust speed and torque. The helical gears are mounted on the housing via a shaft, and the shaft and housing are connected by bearings. This mounting method requires a large number of mounting parts, resulting in low assembly efficiency of the speed reducer. In addition, current speed reducers also have the problem of weak load capacity. Utility Model Content

[0004] In order to solve at least one of the above-mentioned technical problems, the purpose of this utility model is to provide a speed reducer.

[0005] To achieve the above objectives, the speed reducer proposed in this utility model includes:

[0006] Base, first reduction gear assembly, input section, output section;

[0007] The base has a mounting cavity and a first shaft portion integrally formed in the mounting cavity. The first reduction assembly includes an annular enveloping worm gear portion mounted in the mounting cavity and a helical gear portion sleeved on the first shaft portion. The annular enveloping worm gear portion meshes with the helical gear portion. The input portion is driven and connected to the annular enveloping worm gear portion, and the helical gear portion is driven and connected to the output portion.

[0008] In one embodiment, the mounting cavity has a first opening formed on the surface of the seat, and the helical gear portion is sleeved on the first shaft portion through the first opening.

[0009] In one embodiment, the first shaft portion is provided with a through hole that penetrates the base body.

[0010] In one embodiment, the output section is configured as a bearing structure;

[0011] The bearing structure includes an inner ring and an outer ring. The inner ring is fixed to the first shaft by screws to restrict the movement of the helical gear part along the axis of the first shaft part toward the first cavity. The outer ring is connected to the helical gear part by screws.

[0012] In one embodiment, a sealing structure is provided between the outer ring and the first cavity.

[0013] In one embodiment, the annular worm gear portion includes a second shaft portion and a helical tooth portion disposed on the second shaft portion, the second shaft portion being rotatably mounted in the mounting cavity.

[0014] In one embodiment, the mounting cavity has a second opening and a third opening. The circumferential worm gear portion is installed into the mounting cavity through the second opening and abuts against the cavity wall of the mounting cavity. One end of the second shaft portion extends out of the outer side of the seat body through the third opening.

[0015] In one embodiment, the reducer further includes an adjusting sleeve and an adjusting member installed on the base. The adjusting sleeve has a notch and an eccentric hole. The adjusting sleeve is sleeved on the circumferential worm gear portion through the eccentric hole. The notch is provided corresponding to the helical teeth portion on the circumferential worm gear portion.

[0016] The adjusting member can drive the adjusting sleeve to rotate along its own axis and adjust the distance between the annular envelope worm gear portion and the helical gear portion through the eccentric hole.

[0017] In one embodiment, the speed reducer further includes a coupling, and the input section is configured as a coupling.

[0018] In one embodiment, the reducer further includes a mounting bracket for installing the motor, the mounting bracket being fixed to the base by screws, and the output end of the motor being connected to the input part in a transmission connection.

[0019] The technical solution of this utility model adopts the first shaft part and the seat body to be integrally formed. When the first shaft part and the seat body are integrally formed, the helical gear only needs to be sleeved on the first shaft part to complete the assembly. It is understandable that, in order to confine the helical gear portion to the first shaft portion, in some embodiments, a retaining ring can be installed on the first shaft portion to confine the helical gear portion to the first shaft portion. It should be noted that, since the first shaft portion and the base body are integrally formed, the assembly process of the helical gear portion can eliminate the steps of assembling the first shaft portion and adjusting the axis of the first shaft portion. Compared with the prior art, where the helical gear is installed on the shaft portion and the shaft portion and the base body are connected by bearings, many installation steps are saved, which can improve assembly efficiency. At the same time, when the worm gear portion is enclosed in a ring, the load-bearing capacity of the reducer of this application can be improved to a certain extent. Compared with the current ordinary worm gear, it should be noted that the worm gear portion enclosed in a ring has a ring surface, and the tooth surface of the helical gear portion forms a conjugate curved surface during its envelopment, increasing more contact points and contact area, so that the load can be distributed at multiple points or multiple locations, reducing the occurrence of local concentration, thereby improving the load-bearing capacity of the reducer, and thus solving the problem of the weak load-bearing capacity of the existing reducers. Attached Figure Description

[0020] 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.

[0021] Figure 1 This is a schematic diagram of a structure of an embodiment of the speed reducer provided by this utility model;

[0022] Figure 2 for Figure 1 Exploded view of the speed reducer;

[0023] Figure 3 for Figure 1 Cross-section of the speed reducer Figure 1 ;

[0024] Figure 4 for Figure 2 Schematic diagram of the middle shell structure;

[0025] Figure 5 for Figure 1 Cross-section of the speed reducer Figure 2 .

[0026] Explanation of icon numbers:

[0027] 100, Base; 110, Mounting cavity; 111, First cavity opening; 112, Second cavity opening; 113, Third cavity opening; 120, First shaft; 130, Through hole; 140, Mounting hole; 200, First reduction assembly; 210, circumferential worm gear; 211, Second shaft; 212, Helical gear; 220, Helical gear; 300, Input part; 400, Output part; 410, Inner ring; 420, Outer ring; 500, Adjusting sleeve; 510, First groove; 520, Notch; 530, Eccentric hole; 600, Adjusting component; 610, Adjusting part; 620, Pushing part; 700, Mounting bracket; 800, Motor.

[0028] 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

[0029] 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.

[0030] 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.

[0031] 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.

[0032] This utility model proposes a speed reducer.

[0033] Please see Figure 1, Figure 2 In one embodiment of this utility model, the reducer includes a base 100, a first reduction assembly 200, an input section 300, and an output section 400. Specifically, the base 100 has a mounting cavity 110 and a first shaft section 120 integrally formed in the mounting cavity 110. The first reduction assembly 200 includes an annular enveloping worm gear section 210 mounted in the mounting cavity 110 and a helical gear section 220 sleeved on the first shaft section 120. The annular enveloping worm gear section 210 meshes with the helical gear section 220. The input section 300 drives... The annular worm gear section 210 is connected to the helical gear section 220, which drives the output section 400. It can be understood that the external torque enters the reducer through the input section 300, is transmitted from the input section 300 to the annular worm gear section 210, is then transmitted from the annular worm gear section 210 to the helical gear section 220, and then transmitted from the helical gear section 220 to the output section 400, and finally outputs outward from the output section 400. The external torque can be directly input through the motor 800, or it can be indirectly input through the motor 800 through other structures.

[0034] Understandably, when the torque is transmitted to the helical gear section 220 through the annular envelope worm gear section 210, the torque is adjusted under the action of the annular envelope worm gear section 210 and the helical gear section 220.

[0035] It should be noted that the first shaft portion 120 and the base body 100 are integrally formed. When the first shaft portion 120 and the base body 100 are integrally formed, the helical gear only needs to be fitted onto the first shaft portion 120 to complete the assembly. It is understood that, in order to restrict the helical gear portion 220 onto the first shaft portion 120, in some embodiments, a retaining ring can be installed on the first shaft portion 120 to restrict the helical gear portion 220 onto the first shaft portion 120. It should be noted that, since the first shaft portion 120 and the base body 100 are integrally formed, the assembly process of the helical gear portion 220 can eliminate the need for assembling the first shaft portion 120 and adjusting the axis of the first shaft portion 120. Compared to the prior art, where the helical gear is mounted on the shaft portion and the shaft portion and the base body 100 are connected by bearings, this eliminates many installation steps, improves assembly efficiency, and solves the technical problems existing in the prior art.

[0036] Furthermore, when the annular envelope worm gear section 210 is adopted, the load-bearing capacity of the reducer of this application can be improved to a certain extent. Compared with the current ordinary worm gear, it should be noted that the annular envelope worm gear section has an annular surface, and the tooth surface of the helical gear section forms a conjugate curved surface during its envelope process, increasing more contact points and contact area, so that the load can be distributed at multiple points or in multiple locations, reducing the occurrence of local concentration, thereby improving the load-bearing capacity of the reducer and solving the problem of the weak load-bearing capacity of existing reducers. At the same time, when the annular envelope worm gear section is adopted, the center distance between the annular envelope worm gear section and the helical gear section is relatively small, which makes the structure between the annular envelope worm gear section and the helical gear section compact, thus making the reducer structure compact.

[0037] In some embodiments, reference Figure 2 , Figure 4 The mounting cavity 110 is provided with a first cavity 111 formed on the surface of the base 100. The helical gear part 220 is sleeved on the first shaft part 120 through the first cavity 111. It should be noted that the first cavity 111 is formed on the surface of the base 100. At this time, when installing the helical gear part 220, the helical gear part 220 is inserted into the mounting cavity 110 through the first cavity 111 and sleeved on the first shaft part 120. This operation is more convenient and further improves the assembly efficiency of the reducer.

[0038] It should be further explained that the output unit 400 drives the helical gear unit 220. It can be understood that the output unit 400 is fixed to the helical gear, and the output unit 400 can be fixed to the helical gear unit 220 by means of screws. When the helical gear unit 220 rotates, it can drive the output unit 400 to rotate. Furthermore, the output unit 400 can be understood as a connector for connecting external devices to the reducer. The external devices are connected to the reducer through the output unit 400.

[0039] In some embodiments, reference Figure 2 , Figure 4 The first shaft portion 120 is provided with a through hole 130, which penetrates the seat body 100. It should be noted that the purpose of providing the through hole 130 is to reduce the volume and weight of the seat body 100, thereby making the seat body 100 lightweight.

[0040] In some embodiments, reference Figure 5The output section 400 is configured as a bearing structure. The bearing structure includes an inner ring 410 and an outer ring 420. The inner ring 410 is fixed to the first shaft section 120 by screws to restrict the movement of the helical gear section 220 along the axis of the first shaft section 120 toward the first cavity opening 111. It can be understood that the inner ring 410, fixed to the first shaft section 120, prevents the helical gear section 220 from moving along the axis of the first shaft section 120 toward the first cavity opening 111. The cavity wall of the mounting cavity 110 prevents the helical gear section 220 from moving along the axis of the first shaft section 120 away from the first cavity opening 111. Under the action of the cavity wall of the mounting cavity 110 and the inner ring 410 of the bearing structure, the helical gear section 220 is restricted to the first shaft section 120. The outer ring 420 is connected to the helical gear section 220 by screws. Furthermore, in this embodiment, the output section 400 is configured as a bearing structure. It is known that the center of the output section 400 is a hole-like structure. It should be noted that when the output section 400 is configured as a bearing structure, the external device is installed on the outer ring 420. The external device can be installed on the outer ring 420 by screw fastening. Furthermore, at this time, the connecting wires involved in the external device can enter the through hole 130 of the first shaft section 120 through the center of the output section 400, and then pass through the through hole 130 through the base 100 to connect with other devices.

[0041] Furthermore, it should be noted that the bearing structure also includes rolling elements (not shown) installed between the inner ring 410 and the outer ring 420 of the bearing, wherein the rolling elements can be configured as rollers or balls, etc.

[0042] In some embodiments, a sealing structure is provided between the outer ring 420 and the first cavity 111. It should be noted that the purpose of providing the sealing structure is to create a lubrication cavity within the mounting cavity 110. Lubricant is injected into the lubrication cavity to reduce the friction in the transmission between the helical gear portion 220 and the annular envelope worm portion 210. Furthermore, since no bearing is provided between the helical gear portion 220 and the first shaft portion 120, oil lubrication can also be used to reduce the friction between the helical gear portion 220 and the first shaft portion 120. It is understood that when oil lubrication is used, a layer of lubricating oil will form between the helical gear portion 220 and the first shaft portion 120, surrounding the outer side of the first shaft portion 120 and between the helical gear portion 220. However, this design is not limited to this. In some embodiments, a bearing can also be provided between the helical gear portion 220 and the first shaft portion 120 to reduce the friction between them. Furthermore, oil lubrication is used to reduce friction. Compared to reducing friction through oil lubrication, oil lubrication allows the structure of the through hole 130 to be as large as possible and the structure of the base 100 to be as lightweight as possible.

[0043] It should be noted that, in order to create a lubrication cavity within the mounting cavity 110, oil seals are provided at the other openings of the mounting cavity 110.

[0044] In some embodiments, reference Figure 2 , Figure 3 The annular worm gear portion 210 includes a second shaft portion 211 and a helical gear portion 212 disposed on the second shaft portion 211. The second shaft portion 211 is rotatably mounted in the mounting cavity 110. It should be noted that, in some embodiments, the second shaft portion 211 is rotatably mounted in the mounting cavity 110 via a bearing, and the helical gear portion 212 meshes with the helical gear portion 220. Further, in some embodiments, the helical gear portion 212 meshes with 6 to 8 teeth of the helical gear portion 220, thereby effectively increasing the load-bearing capacity. Furthermore, in some embodiments, a mounting part is detachably connected to the base 100. Removing the mounting part exposes the mounting cavity 110. At this time, the circumferential worm gear part 210 is installed in the mounting cavity 110, and then the mounting part is fixed to the base 100. It should be noted that after the mounting part is fixed to the base 100, the mounting part can limit the circumferential worm gear part 210 through the bearing component, thus restricting the circumferential worm gear part 210 in the mounting cavity 110.

[0045] In some embodiments, reference Figure 2 , Figure 3 , Figure 4 The mounting cavity 110 is provided with a second cavity 112 and a third cavity 113. The circumferentially enclosing worm gear portion 210 is installed into the mounting cavity 110 through the second cavity 112 and abuts against the cavity wall of the mounting cavity 110. One end of the second shaft portion 211 extends out of the outer side of the seat body 100 through the third cavity 113. It should be noted that both the second cavity 112 and the third cavity 113 are provided with sealing structures (oil seals) to enable the mounting cavity 110 to form a lubrication cavity. Furthermore, the second cavity 112 and the third cavity 113 facilitate the installation of the circumferentially enclosing worm gear portion 210 into the mounting cavity 110. In some embodiments, the second shaft portion 211 of the circumferentially enclosing worm gear portion 210 is rotatably mounted in the mounting cavity 110 via a bearing.

[0046] In some embodiments, reference Figure 3 , Figure 5The reducer also includes an adjusting sleeve 500 sleeved on the circumferential worm gear portion 210. It should be noted that the adjusting sleeve 500 is provided with an eccentric hole 530. The adjusting sleeve 500 is sleeved on the circumferential worm gear portion 210 through the eccentric hole 530. The circumferential worm gear portion 210 and the adjusting sleeve 500 are rotatably connected. Specifically, the second shaft portion 211 of the circumferential worm gear portion 210 is connected to the adjusting sleeve 500 through a bearing. The adjusting sleeve 500 is provided with a notch 520, which is provided corresponding to the helical tooth portion 212. Furthermore, the reducer also includes an adjusting member 600 rotatably mounted on the base 100; rotating the adjusting member 600 can adjust the distance between the annular envelope worm gear portion 210 and the helical gear portion 220; specifically, the outer side of the adjusting sleeve 500 has two opposing first grooves 510, and the base 100 has two mounting holes 140, which correspond one-to-one with the two first grooves 510. Two adjusting members 600 are configured, each inserted into the base 100 through one of the two mounting holes 140. It should be noted that the adjusting member 600 includes an adjusting part 610 and a pushing part 620, wherein the adjusting part 610 is threadedly connected to the mounting hole 140, and the pushing part 620 is inserted into the mounting hole 140. During rotation, the adjusting part 610 can push the pushing part 620 to move. Furthermore, under the restraining action of the pushing part 620, the adjusting sleeve 500 can be confined within the mounting cavity 110, limiting the adjustment. The sleeve 500 moves within the mounting cavity 110, wherein the adjusting sleeve 500 can rotate within the mounting cavity 110; as the pushing part 620 continues to penetrate deeper, the pushing part 620 gradually inserts into the first groove 510 on the adjusting sleeve 500 and pushes against the groove wall of the first groove 510. As the adjusting part 610 is further screwed in, the pushing part 620 can push the adjusting sleeve 500 through the first groove 510, causing the adjusting sleeve 500 to rotate around its own axis, while the eccentric hole The eccentric hole 530 drives the worm gear 210 to rotate. Because the axis of the eccentric hole 530 rotates, the axis of the worm gear 210 also rotates, thereby adjusting the distance between the worm gear 210 and the helical gear 220. It should be noted that in this embodiment, the bottom surface of the base 100 is used as a reference surface, where the bottom surface of the base 100 is horizontal, and the axis of the first groove 510 is inclined to the bottom surface of the base 100. It can be understood that while adjusting the distance between the adjusting sleeve 500 and the helical gear 220, the distance between the worm gear 210 and the helical gear 220 can also be adjusted. It should be noted that there are certain errors in the manufacturing process of the annular envelope worm gear portion 210 and the helical gear portion 220. To avoid the impact of manufacturing errors on the assembly performance, the distance between the annular envelope worm gear portion 210 and the helical gear portion 220 can be adjusted in this way, thereby improving the meshing effect between them. Furthermore...

[0047] It should be noted that when it is necessary to appropriately increase the distance between the annular envelope worm gear part 210 and the helical gear part 220, it is only necessary to move the adjusting part 610 out a certain distance to achieve this.

[0048] It should be noted that in some embodiments, the adjustable sleeve 500 can move within a range of 0.1mm-0.5mm, which is understood as the range of movement in one direction.

[0049] In some embodiments, reference Figure 2 , Figure 3 The reducer also includes a coupling, and the input section 300 is configured as a coupling. Further, when the input section 300 is configured as a coupling, the input section 300 is connected to the annular envelope worm gear section 210. Further, in some embodiments, when the annular envelope worm gear section 210 includes a second shaft section 211, the second shaft section 211 is inserted into the coupling and connected to the coupling key. This structure facilitates the assembly of the coupling and further improves the assembly efficiency of the reducer.

[0050] In some embodiments, reference Figure 1 , Figure 2 The reducer also includes a mounting bracket 700 for mounting the motor 800. The mounting bracket 700 is fixed to the base 100 by screws. The output end of the motor 800 is connected to the input part 300. To improve the convenience of use, when the motor 800 is assembled with the reducer, it can be connected to the reducer through the mounting bracket 700. It is understood that the mounting bracket 700 provides a pre-installation position for mounting the motor 800. Further, in some embodiments, when the input part 300 is configured as a coupling, the output end of the motor 800 is connected to the coupling. Specifically, the output end of the motor 800 is inserted into the coupling and connected to the coupling key.

[0051] 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, include: Base, first reduction gear assembly, input section, output section; The base has a mounting cavity and a first shaft portion integrally formed in the mounting cavity. The first reduction assembly includes an annular enveloping worm gear portion mounted in the mounting cavity and a helical gear portion sleeved on the first shaft portion. The annular enveloping worm gear portion meshes with the helical gear portion. The input portion is driven and connected to the annular enveloping worm gear portion, and the helical gear portion is driven and connected to the output portion.

2. The speed reducer as described in claim 1, characterized in that, The mounting cavity has a first opening formed on the surface of the base body, and the helical gear portion is sleeved on the first shaft portion through the first opening.

3. The speed reducer as described in claim 2, characterized in that, The first shaft portion is provided with a through hole, which penetrates the base body.

4. The speed reducer as described in claim 2, characterized in that, The output section is configured as a bearing structure; The bearing structure includes an inner ring and an outer ring. The inner ring is fixed to the first shaft by screws to restrict the movement of the helical gear part along the axis of the first shaft part toward the first cavity. The outer ring is connected to the helical gear part by screws.

5. The speed reducer as described in claim 4, characterized in that, A sealing structure is provided between the outer ring and the first cavity.

6. The speed reducer as described in claim 1, characterized in that, The annular worm gear portion includes a second shaft portion and a helical tooth portion disposed on the second shaft portion, the second shaft portion being rotatably mounted in the mounting cavity.

7. The speed reducer as described in claim 6, characterized in that, The mounting cavity has a second opening and a third opening. The circumferential worm gear is installed into the mounting cavity through the second opening and abuts against the cavity wall. One end of the second shaft extends out of the outer side of the seat through the third opening.

8. The speed reducer as described in claim 7, characterized in that, The reducer also includes an adjusting sleeve and an adjusting component installed on the base. The adjusting sleeve has a notch and an eccentric hole. The adjusting sleeve is sleeved on the circumferential worm gear part through the eccentric hole. The notch is provided corresponding to the helical teeth on the circumferential worm gear part. The adjusting member can drive the adjusting sleeve to rotate along its own axis and adjust the distance between the annular envelope worm gear portion and the helical gear portion through the eccentric hole.

9. The speed reducer as described in claim 1, characterized in that, The speed reducer also includes a coupling, and the input section is configured as a coupling.

10. The speed reducer according to any one of claims 1 to 9, characterized in that, The reducer also includes a mounting bracket for installing the motor. The mounting bracket is fixed to the base by screws, and the output end of the motor is connected to the input part for transmission.

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