Fixing structure and gear box

Abstract

The utility model relates to the technical field of electric tools, and particularly discloses a fixing structure and a gear box, the fixing structure comprises a mounting main body, a fixing part assembled on one side of the mounting main body and a gasket laid on the outer side of the fixing part, the fixing part is formed by splicing two or more fixing units, the fixing part comprises the two fixing units, and the gasket is arranged on the outer side of the fixing part. The fixing unit comprises a fixing unit main body, a first clamping part and a locking position are arranged on the fixing unit main body, and a clamping position corresponding to the first clamping part is arranged on the mounting main body; the fixing piece is clamped with the clamping position on the mounting main body through the first clamping part, the two fixing units are spliced to form the fixing piece, and the fixing piece is clamped and mounted on the mounting main body. The fixing piece of the structure is formed by splicing more than two fixing units, when the fixing piece is locally damaged, only the damaged fixing units need to be replaced, the situation that a traditional integral fixing piece is integrally replaced is not needed, and the replacement cost is greatly reduced.

Description

Technical Field

[0001] This application relates to the field of power tool technology, and in particular to a fixed structure and gearbox. Background Technology

[0002] In various mechanical devices, fasteners play a crucial role, responsible for securely connecting different components and ensuring the normal operation of the entire system. Taking a gearbox as an example, during gear shifting, the fasteners need to reliably fix the shift gear ring to the gearbox housing.

[0003] However, based on our understanding of relevant technologies, some fasteners are typically designed as a single, integral structure. If a part of this type of fastener is damaged, due to its structural integrity, the damaged portion cannot be replaced individually; the entire fastener must be replaced. This not only significantly increases replacement costs but also requires a considerable amount of time for disassembly and installation, severely impacting the normal operating efficiency of the equipment. Utility Model Content

[0004] The purpose of at least one specific embodiment of this utility model is to overcome the defects of the prior art and provide a fixed structure and gearbox.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A fixed structure, comprising:

[0007] Installation main body;

[0008] Fasteners installed on the mounting body;

[0009] The fastener is composed of two or more fastening units spliced ​​together;

[0010] The fixing unit includes a fixing unit body, which has a first snap-fit ​​part and a locking position, and the mounting body has a snap-fit ​​position corresponding to the first snap-fit ​​part.

[0011] The fastener engages with the snap-fit ​​position on the mounting body via the first snap-fit ​​part, and the fastener is snapped into place on the mounting body.

[0012] Furthermore, both the snap-fit ​​position and the locking position are snap-fit ​​slots.

[0013] Furthermore, the fastener is snapped into place on one end face of the mounting body and is circumferentially limited.

[0014] Furthermore, the surface of the fastener is covered with a gasket.

[0015] Furthermore, the fastener also includes a slot mounting component, the main body of which has a second snap-fit ​​portion corresponding to the snap-fit ​​position on the mounting body.

[0016] Furthermore, one side of the fixing unit body and / or the slot mounting body has a gasket construction surface. After multiple fixing unit bodies and slot mounting bodies are spliced ​​together to form a fixing component, multiple gasket construction surfaces are spliced ​​together to form a gasket, and the gasket is constructed as part of the fixing component.

[0017] Furthermore, both the first and second snap-fit ​​portions are protruding structures.

[0018] The advantages of the fixing structure provided in this application compared with the prior art are as follows: the fixing component of the structure is composed of two or more fixing units spliced ​​together. When the fixing component is partially damaged, only the damaged fixing unit needs to be replaced, instead of replacing the whole component as in the traditional integral fixing component, which greatly reduces the replacement cost.

[0019] The combination of multiple fixed units makes the installation and maintenance process more flexible. Each fixed unit is relatively small in size and weight, making it easy for operators to install, disassemble and adjust, reducing the difficulty of operation and improving work efficiency.

[0020] Another technical solution adopted in this application is: providing a gearbox, comprising:

[0021] In the aforementioned fixing structure, the mounting body is constructed as the housing of a gearbox;

[0022] The shift ring is mounted on one side of the housing;

[0023] A multi-stage planetary gear assembly, which is installed inside a housing;

[0024] The multi-stage planetary gear assembly has at least two gears, which are changed and switched by the movement of the shift gear ring;

[0025] When the multi-stage planetary gear assembly is in the first gear position, the shift ring gear approaches the fixed part and locks relative to the fixed part.

[0026] When the multi-stage planetary gear assembly is in the second gear position, the shift ring moves away from the fixed part and the locking state with the fixed part is released.

[0027] Furthermore, the shift gear ring is provided with a locking part corresponding to the locking position. When the shift gear ring approaches the fixing member and locks relative to the fixing member, the locking part locks with the locking position, and the shift gear ring is circumferentially limited by the fixing member.

[0028] Furthermore, a motor is provided at the power input end of the gearbox, and a rotating shaft is provided at the power output end. One end of the multi-stage planetary gear assembly is connected to the motor, and the other end is connected to the rotating shaft.

[0029] The gearbox provided in this application allows for switching between different gears of a multi-stage planetary gear assembly by locking and unlocking the gear ring with a fixing component. This design makes the gearbox shifting operation more precise and reliable, and improves the gearbox's transmission performance and operational stability. Attached Figure Description

[0030] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the fixed structure in Embodiment 1 of this application.

[0032] Figure 2 This is a schematic diagram of the assembly of the fixed structure in Embodiment 1 of this application.

[0033] Figure 3 This is a schematic diagram of the fixed structure in Embodiment 2 of this application.

[0034] Figure 4 This is a schematic diagram of the assembly of the fixed structure in Embodiment 2 of this application.

[0035] Figure 5 This is a schematic diagram of the fixed structure in Embodiment 3 of this application.

[0036] Figure 6 This is a schematic diagram of the assembly of the fixed structure in Embodiment 3 of this application.

[0037] Figure 7 This is a schematic diagram of the fastener in Embodiment 3 of this application.

[0038] Figure 8 This is a cross-sectional schematic diagram of the gearbox in Embodiment 4 of this application.

[0039] Figure 9 This is a cross-sectional schematic diagram of the power tool containing the gearbox in Embodiment 4 of this application. Detailed Implementation

[0040] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0041] Example 1

[0042] Reference Figure 1 , Figure 2 A fixing structure 100 includes an installation body 10, a fixing member 20 assembled on one side of the installation body 10, and a gasket 30 laid on the outside of the fixing member 20. The fixing member 20 is composed of two or more fixing units 201 spliced ​​together. In this embodiment, the fixing member 20 includes two fixing units 201 and 202. The fixing units 201 and 202 have the same structure. Taking the structure of the fixing unit 201 as an example, the fixing unit 201 includes a fixing unit body 201a. The fixing unit body 201a is provided with a first snap-fit ​​part 201b and a locking position 201c. The installation body 10 is provided with a snap-fit ​​position 10a corresponding to the first snap-fit ​​part 201b.

[0043] The fastener 20 engages with the snap-fit ​​position 10a on the mounting body 10 via the first snap-fit ​​part 201b. The two fastening units 201 and 202 are spliced ​​together to form the fastener 20, which is then snapped onto the mounting body 10.

[0044] In this embodiment, the snap-fit ​​position 10a is a slot on the mounting body 10 corresponding to the first snap-fit ​​part 201b. When the fastener 20 is installed at the end of the mounting body 10, the fastener 20 is snapped and installed at the end face position on one side of the mounting body 10 and is circumferentially limited. That is to say, the fastener 20 cannot rotate on the mounting body 10 after snapping and installation. In this embodiment, the two fixing units 201 and 202 are both semi-circular structures. After the two fixing units 201 and 202 are spliced ​​together to form the fastener 20, the fastener 20 has a ring structure.

[0045] The fastener 20 of this structure is composed of two or more fastening units 201 and 202 spliced ​​together. When the fastener 20 is partially damaged, only the damaged fastening unit 201 or 202 needs to be replaced. Unlike traditional integral fasteners, the whole fastener does not need to be replaced, which greatly reduces the replacement cost.

[0046] The combination of multiple fixed units 201 makes the installation and maintenance process more flexible. Each fixed unit is relatively small in size and weight, making it easy for operators to install, disassemble and adjust, reducing the difficulty of operation and improving work efficiency.

[0047] Example 2

[0048] Reference Figure 3 , Figure 4The difference between this embodiment and embodiment 1 is that in this embodiment, the fastener 20 includes four fastening units 203. The difference between the fastening unit 203 and the fastening unit 201 in embodiment 1 is that the single fastening unit 203 in this embodiment has a fan-shaped structure, and after the four fastening units 203 are spliced ​​together to form the fastener 20, the fastener 20 has a ring structure.

[0049] Example 3

[0050] Reference Figure 5 , Figure 6 , Figure 7 The difference between this embodiment and embodiment 1 is that in this embodiment, the fixing member 20 includes two fixing units 201 and 202 and two slot mounting members 204 and 205. The fixing units 201 and 202 have the same structure, and the slot mounting members 204 and 205 have the same structure. Taking the structure of the slot mounting member 204 as an example, the slot mounting member 204 includes a slot mounting member body 204a, and the slot mounting member body 204a is provided with a second snap-fit ​​part 204b corresponding to the snap-fit ​​position 10a on the mounting body 10.

[0051] The snap-fit ​​position 10a is a slot on the mounting body 10 that corresponds to the first snap-fit ​​part 201b. The second snap-fit ​​part 204b is a protrusion on the slot mounting body 204a. When the slot mounting part 204 is installed on the mounting body 10, the slot mounting body 204a engages with the snap-fit ​​position 10a on the mounting body 10 through the second snap-fit ​​part 204b.

[0052] When the fastener 20 is installed at the end of the mounting body 10, the main body 204a of the slot mounting component 204 is first engaged with the snap-fit ​​position 10a on the mounting body 10 through the second snap-fit ​​part 204b. After the slot mounting component 204 is installed, the adjacent fixing unit 201 is engaged with the snap-fit ​​position 10a on the mounting body 10 through the first snap-fit ​​part 201b, and the installation is completed. Similarly, the installation of the next slot mounting component 205 and fixing unit 202 is carried out step by step. After the two fixing units 201 and 202 and the two slot mounting components 204 and 205 are installed, they can be spliced ​​to form a ring-shaped fastener 20.

[0053] Furthermore, one side of each of the two fixing units 201, 202 and the two slot mounting members 204, 205 has a gasket construction surface 30a. After the two fixing units 201, 202 and the two slot mounting members 204, 205 are spliced ​​together to form the fixing member 20, multiple gasket construction surfaces 30a are spliced ​​together to form a gasket 30. In this embodiment, the gasket 30 is directly constructed as part of the fixing member 20. When assembling the fixing member 20, the two fixing units 201, 202 and the two slot mounting members 204, 205 are spliced ​​together according to predetermined splicing rules and process requirements. During this process, the gasket construction surfaces 30a on each component are cleverly combined. After the numerous gasket construction surfaces 30a are spliced ​​together, they precisely align and fit together to form a complete gasket 30. It is worth emphasizing that in this embodiment, the gasket 30 is not an additional component independent of the fixing member 20, but is directly constructed as an organic part of the fixing member 20. This integrated design concept greatly enhances the compactness and integrity of the fastener 20 structure, reduces the potential risk of loosening caused by the assembly of additional components, and simplifies the production process and assembly flow to a certain extent, laying a solid foundation for the efficient production and stable use of the product.

[0054] Example 4

[0055] Reference Figure 8 This embodiment mainly concerns the specific application of the fixed structure 100 in the gearbox 200 in the above embodiments. The gearbox 200 provided in this embodiment includes a housing 210 and a multi-stage planetary gear assembly 220 disposed in the housing 210. In this embodiment, the multi-stage planetary gear assembly 220 is a three-stage planetary gear assembly. Specifically, the three-stage planetary gear assembly includes a first gear ring 2201a, a first cage 2201b disposed on one side of the first gear ring 2201a, and three first planetary gears 2201c rotatably mounted on one side of the first cage 2201b. A motor 300 is mounted on one side of the first gear ring 2201a, and the output shaft of the motor 300 is connected to a first sun gear 2201d. The three first planetary gears 2201c surround the outside of the first sun gear 2201d and mesh with it. At the same time, the three first planetary gears 2201c are located inside the first gear ring 2201a and mesh with the internal teeth of the first gear ring 2201a.

[0056] Similarly, the three-stage planetary gear assembly also includes a second ring gear 2202a, a second cage 2202b disposed on one side of the second ring gear 2202a, and three second planetary gears 2202c rotatably mounted on one side of the second cage 2202b. A second sun gear 2202d is mounted on one side of the first cage 2201b, and the three second planetary gears 2202c surround the outer side of the second sun gear 2202d and mesh with it. At the same time, the three second planetary gears 2202c are located inside the second ring gear 2202a and mesh with the internal teeth of the second ring gear 2202a.

[0057] Furthermore, the housing 210 is constructed as the mounting body 10 in the above embodiment. At the same time, the housing 210 is also the third gear ring of the three-stage planetary gear assembly. The three-stage planetary gear assembly also includes a third cage 2203b disposed on one side of the third gear ring, and three third planetary gears 2203c rotatably mounted on one side of the third cage 2203b. The third sun gear 2203d is mounted on one side of the second cage 2202b, and the three third planetary gears 2203c surround the outside of the third sun gear 2203d and mesh with it. Meanwhile, the three third planetary gears 2203c are located inside the third gear ring and mesh with the internal teeth of the third gear ring.

[0058] In this embodiment, the gearbox 200 is a shiftable gearbox, and the second gear ring 2202a is a shift gear ring. During the shifting process, the second gear ring 2202a is mainly moved. Specifically, the multi-stage planetary gear assembly 220 has at least two gears, and the two gears are changed and switched by moving the shift gear ring (second gear ring 2202a). When shifting gears, the second gear ring 2202a needs to cooperate with the fixing member 20 on the housing 210. When the fixing member 20 is installed at the end of the mounting body 10 (housing 210), the fixing member 20 is engaged and installed at the end face position on one side of the mounting body 10 (housing 210) and is circumferentially limited.

[0059] During gear shifting, when the multi-stage planetary gear assembly 220 is in the first gear position, the second gear ring 2202a approaches the fixed member 20 and locks relative to the fixed member 20.

[0060] When the multi-stage planetary gear assembly 220 is in the second gear position, the second gear ring 2202a moves away from the fixing member 20 and the locking state with the fixing member 20 is released.

[0061] Specifically, the shift ring (second gear ring 2202a) is provided with a locking part 2202a1 corresponding to the locking position 201c on the fixing member 20. When the gearbox 200 needs to be set to the first gear, the shift ring (second gear ring 2202a) needs to be moved so that the shift ring (second gear ring 2202a) is close to the fixing member 20. At this time, the locking part 2202a1 on the shift ring (second gear ring 2202a) matches the locking position 201c on the fixing member 20. When the fixing member 20 is circumferentially... When the gearbox 200 is in the limiting position, the shift gear ring (second gear ring 2202a) is also circumferentially limited by the fixing member 20. At this time, the shift gear ring (second gear ring 2202a) is fixed and locked relative to the housing 210. When the gearbox 200 is running, the motor 300 drives the first sun gear 2201d to rotate. The first sun gear 2201d drives the first planet gear 2201c to travel inside the first gear ring 2201a. While rotating on its own axis, the first planet gear 2201c revolves around the first sun gear 2201d. The first planetary gear 2201c, revolving around the sun gear 2202, drives the first cage 2201b to rotate, achieving the first stage of deceleration. Simultaneously, the first cage 2201b drives the second sun gear 2202d to rotate, which in turn drives the second planetary gear 2202c to travel inside the second gear ring 2202a. While rotating on its own axis, the second planetary gear 2202c revolves around the second sun gear 2202d, and this revolution drives the second cage 2202b to rotate. This achieves the second stage of reduction. Furthermore, the second cage 2202b drives the third sun gear 2203d to rotate, and the third sun gear 2203d drives the third planet gear 2203c to travel inside the housing 210. While rotating on its own axis, the third planet gear 2203c revolves around the third sun gear 2203d. The revolving third planet gear 2203c drives the third cage 2203b to rotate, achieving the third stage of reduction. At this time, the gearbox 200 is in the first gear position, and the gearbox 200 is a three-stage reduction gearbox.

[0062] Furthermore, when the shift ring (second gear ring 2202a) is moved away from the fixing member 20, the locking part 2202a1 on the shift ring (second gear ring 2202a) separates from the locking position 201c on the fixing member 20. The shift ring (second gear ring 2202a) is located on one side of the housing 210 and is not circumferentially locked. In actual operation, the motor 300 drives the first sun gear 2201d to rotate, and the first sun gear 2201d drives the first planet gear 2201c to travel inside the first gear ring 2201a. The first planet gear 2201c revolves around the first sun gear 2201d while rotating on its own axis. The revolving first planet gear 2201c drives the first cage 2201b to rotate. At this time, the first stage of deceleration is achieved, and the first cage 2201b rotates continuously. The retainer 2201b drives the second sun gear 2202d to rotate. When the shift ring gear (second ring gear 2202a) is not circumferentially locked, the second sun gear 2202d drives the second planet gear 2202c to rotate. The transmission torque of the second sun gear 2202d is directly transmitted to the second retainer 2202b. Furthermore, the second retainer 2202b drives the third sun gear 2203d to rotate. The third sun gear 2203d drives the third planet gear 2203c to travel inside the housing 210. The third planet gear 2203c revolves around the third sun gear 2203d while rotating on its own axis. The revolving third planet gear 2203c drives the third retainer 2203b to rotate. At this time, the second stage of reduction is achieved. The gearbox 200 is in the second gear position. The gearbox 200 is a two-stage reduction gearbox.

[0063] The shift ring gear of the gearbox provided in this application can switch between different gears of the multi-stage planetary gear assembly by locking and unlocking with the fixing member 20. This design makes the shifting operation of the gearbox 200 more precise and reliable, and improves the transmission performance and working stability of the gearbox.

[0064] Furthermore, refer to Figure 9 When the gearbox 200 of this application is used in the power tool 400, the gearbox 200 and the motor 300 are installed in the power tool 400. The shaft 410 at one end of the power tool 400 is connected to the third retainer 2203b of the gearbox 200. The end of the shaft 410 away from the third retainer 2203b is connected to the tool head 420. After the motor 300 is started, the power is transmitted to the gearbox 200. After the gearbox 200 reduces the speed, the power is then transmitted to the shaft 410 and finally drives the tool head 420 to rotate.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A fixed structure, comprising: Installation main body; Fasteners installed on the mounting body; The characteristic feature is that the fastener is composed of two or more fastening units spliced ​​together; The fixing unit includes a fixing unit body, the fixing unit body is provided with a first snap-fit ​​part and a locking position, and the mounting body is provided with a snap-fit ​​position corresponding to the first snap-fit ​​part; The fastener engages with the snap-fit ​​position on the mounting body via the first snap-fit ​​portion, and the fastener is snapped and installed on the mounting body.

2. The fixing structure according to claim 1, characterized in that, Both the latching position and the locking position are latching slots.

3. The fixing structure according to claim 1, characterized in that, The fastener is snapped into place at one end face of the mounting body and is circumferentially limited.

4. The fixing structure according to claim 1, characterized in that, The surface of the fastener is covered with a gasket.

5. The fixing structure according to claim 2, characterized in that, The fastener also includes a slot mounting component, the main body of which has a second snap-fit ​​portion corresponding to the snap-fit ​​position.

6. The fixing structure according to claim 5, characterized in that, One side of the fixing unit body and / or the slot mounting body has a gasket structure surface. After multiple fixing unit bodies and slot mounting bodies are spliced ​​together to form a fixing member, multiple gasket structure surfaces are spliced ​​together to form a gasket, and the gasket is constructed as part of the fixing member.

7. The fixing structure according to claim 5, characterized in that, Both the first and second snap-fit ​​portions are protruding structures.

8. A gearbox, characterized in that, include: The fixing structure according to any one of claims 1-7, wherein the mounting body is configured as the housing of the gearbox; A shift gear ring is mounted on one side of the housing; A multi-stage planetary gear assembly, which is installed within the housing; The multi-stage planetary gear assembly has at least two gears, which are changed and switched by the movement of the shift ring gear; When the multi-stage planetary gear assembly is in the first gear position, the shift ring gear is close to the fixing member and locked relative to the fixing member. When the multi-stage planetary gear assembly is in the second gear position, the shift ring moves away from the fixing member and is released from its locking state with the fixing member.

9. The gearbox according to claim 8, characterized in that, The shift gear ring is provided with a locking part corresponding to the locking position. When the shift gear ring is close to the fixing member and locked relative to the fixing member, the locking part locks with the locking position, and the shift gear ring is circumferentially limited by the fixing member.

10. The gearbox according to claim 8, characterized in that, The gearbox has a motor at its power input end and a shaft at its power output end. One end of the multi-stage planetary gear assembly is connected to the motor, and the other end is connected to the shaft.

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