Plastic gearbox capable of preventing hose from leaking water
By adding elastic extrusion components and fixed clamping parts to the sector swing parts of the plastic gear box, the problems of water leakage and wear of the plastic gear box in the prior art are solved, and more stable hose extrusion and longer product life are achieved.
Patent Information
- Application Number
- CN202421735113.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-07-22
AI Technical Summary
The existing plastic gearboxes have defects in the extruded structure design of the eccentric wheel and the fan swinging parts, resulting in high precision requirements for parts manufacturing, poor assembly tolerances and hose outer diameter dimensions, prone to water leakage problems, and friction accelerates wear and reduces product life.
A plastic gear box including a plastic main housing and a secondary housing is designed. The secondary housing is equipped with a fan-shaped swing member and an eccentric wheel, and an elastic extrusion assembly and a fixed clamping part are provided on the arc surface. The elastic extrusion assembly and the fixed clamping part are clamped together to ensure extrusion stability.
Effectively prevent hose leakage, reduce the requirements for component manufacturing accuracy, save costs, and improve product service life.
Smart Images
Figure CN222963290U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a plastic gearbox, in particular to a plastic gearbox for preventing a hose from leaking water. Background Art
[0002] With the rapid economic development of society and the continuous improvement of people's living standards, people's requirements for smart home appliances are also getting higher and higher. In order to improve people's living experience, smart robots (such as floor-sweeping robots) have entered people's lives and become little helpers in people's lives.
[0003] In the cleaning function of a floor-sweeping robot, there are functions of sprinkling water and mopping the floor. The hose for sprinkling water needs to be switched on and off by a plastic gearbox. The current plastic gearbox includes a plastic housing, a motor, a plastic gear set, a torsion spring, an eccentric wheel, a sector swing member, a hose, a housing bolt, etc. The working principle of the existing plastic gearbox is: mainly through the output eccentric wheel of the gearbox, driving the sector swing member to rotate, forming extrusion on the hose to achieve the purpose of stopping water. However, there are design defects in the extrusion structure of the eccentric wheel and the sector swing member of this plastic gearbox. First, the requirements for the manufacturing precision of parts, the assembly tolerance between components, and the outer diameter size of the hose are very high. When the part sizes cannot meet the requirements, the extrusion distance between the sector swing member and the hose is poor, resulting in water leakage problems. Second, friction will occur when the eccentric wheel and the sector swing member work, accelerating the wear between parts, increasing the extrusion distance between the sector swing member and the hose, also resulting in water leakage problems, thus reducing the service life of the product and affecting the user experience.
[0004] The technical solution of this patent is proposed under such a background, which can reduce the manufacturing tolerance of parts, save the manufacturing cost of parts, and improve the problem of hose water leakage. Summary of the Invention
[0005] In order to overcome the disadvantages and deficiencies existing in the prior art, the purpose of the utility model is to provide a plastic gearbox for preventing a hose from leaking water.
[0006] The purpose of the utility model is achieved by the following technical solutions: A plastic gearbox for preventing a hose from leaking water, including a plastic main housing and a plastic sub-housing. The plastic main housing is arranged on one outer side of the plastic sub-housing. A sector swing member and an eccentric wheel for driving the sector swing member to swing left and right are arranged in the plastic sub-housing. The sector swing member has an arc surface, and mounting seats are respectively arranged at both ends of the arc surface. Elastic extrusion components are arranged on both mounting seats. A fixed clamping part is arranged at the edge of the inner side surface of the plastic sub-housing, and the fixed clamping part is located between the two mounting seats. Any one of the elastic extrusion components can jointly clamp the hose with the fixed clamping part.
[0007] As an improvement of the plastic gearbox for preventing hose leakage of the present utility model, a plastic gear set is provided inside the plastic main housing. The bottom of the plastic main housing is fixedly installed with a motor through screws. The output shaft of the motor is connected to the plastic gear set, and the plastic gear set is connected to the eccentric wheel through a transmission rod.
[0008] As an improvement of the plastic gearbox for preventing hose leakage of the present utility model, a roller rod is provided at the edge of the eccentric wheel. The end of the roller rod is connected to a push block. A roller is sleeved on the roller rod. One end of the push block is connected to the middle of the eccentric wheel through a fixing rod.
[0009] As an improvement of the plastic gearbox for preventing hose leakage of the present utility model, a push block through hole is provided in the middle of the sector swing member. The side wall of the push block through hole has a roller running track. The roller running track has two limit positions, and the roller can slide between the two limit positions.
[0010] As an improvement of the plastic gearbox for preventing hose leakage of the present utility model, mounting grooves are provided on both of the two mounting seats. The elastic extrusion assembly is arranged in the mounting grooves and fixed and limited by fixing pieces.
[0011] As an improvement of the plastic gearbox for preventing hose leakage of the present utility model, the elastic extrusion assembly includes an extrusion piece and a compression spring. A compression spring fixing column is provided on one side of the extrusion piece. The compression spring is sleeved on the compression spring fixing column. An extrusion plate is provided in the middle of the other side of the extrusion piece. The cross section of the extrusion plate is U-shaped.
[0012] As an improvement of the plastic gearbox for preventing hose leakage of the present utility model, hose through holes are respectively provided on both sides of the bottom of the plastic sub-housing located at the fixed clamping part. The hose passes through the hose through holes.
[0013] As an improvement of the plastic gearbox for preventing hose leakage of the present utility model, a plastic cover plate is covered on the plastic sub-housing and fixed with cover plate screws. A plurality of stud bolts are provided at intervals on the bottom of the plastic sub-housing. A plurality of screw buckle ears are provided at intervals on the outer side surface of the plastic main housing. Each screw buckle ear is provided with a fixing screw, and the fixing screw is connected to the stud bolt. A positioning shaft is further provided inside the plastic sub-housing. The sector swing member is connected to the positioning shaft. A torsion spring is provided on the positioning shaft. Both torsion spring extension parts of the torsion spring abut against the two side edges of the sector swing member.
[0014] As an improvement of the plastic gearbox for preventing water leakage of the hose in the present utility model, the plastic gear set includes a driving helical gear, an intermediate gear pair, and an output spur gear. The output spur gear is arranged at the bottom of the eccentric wheel and is coaxial. The intermediate gear pair includes an intermediate helical gear and an intermediate spur gear. The intermediate helical gear and the intermediate spur gear are coaxial. The driving helical gear meshes with the intermediate helical gear, and the intermediate spur gear meshes with the output spur gear.
[0015] As an improvement of the plastic gearbox for preventing water leakage of the hose in the present utility model, the plastic cover plate is provided with a hose installation hole, the hose installation hole corresponds to the fixed clamping portion, and the hose is bent into a U shape and passes through the two hose perforations.
[0016] The beneficial effects of the present utility model are as follows: The present utility model changes the structure on the sector swing member, adds an elastic extrusion assembly to ensure the stability of squeezing the hose. While solving the problem of preventing water leakage of the hose, the requirement for the manufacturing precision of each component is reduced, the cost is saved, and the service life of the product is also improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is the front perspective view of the present utility model;
[0018] Figure 2 is the bottom perspective view of the present utility model;
[0019] Figure 3 is the exploded schematic view of the present utility model;
[0020] Figure 4 is the internal structure schematic view of the plastic sub-housing of the present utility model;
[0021] Figure 5 is the structure schematic view of the gear set transmission part of the present utility model;
[0022] The reference numerals are: 1, plastic main housing; 2, plastic sub-housing; 3, sector swing member; 4, eccentric wheel; 5, arc surface; 6, mounting seat; 7, elastic extrusion assembly; 8, fixed clamping portion; 9, hose; 10, plastic gear set; 11, motor; 12, fixing member; 13, hose perforation; 14, screw buckle ear; 15, fixing screw; 21, plastic cover plate; 22, cover plate screw; 23, stud; 24, hose perforation; 25, positioning shaft; 26, torsion spring; 31, push block extension hole; 32, roller running track; 33, limit position; 41, roller rod; 42, push block; 43, roller; 44, fixed rod; 61, mounting groove; 71, extrusion member; 72, compression spring; 73, compression spring fixing column; 74, extrusion plate; 101, driving helical gear; 102, intermediate gear pair; 103, output spur gear; 1021, intermediate helical gear; 1022, intermediate spur gear. Detailed implementation manners
[0023] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than 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 efforts shall fall within the protection scope of the present utility model.
[0024] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, the directional indications will also change accordingly.
[0025] In addition, the descriptions involving "first", "second", etc. in the present utility model are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.
[0026] As Figures 1 - 5 shown, a plastic gearbox for preventing a hose from leaking water includes a plastic main housing 1 and a plastic sub-housing 2. The plastic main housing 1 is disposed on an outer side of the plastic sub-housing 2. A sector-shaped swinging member 3 and an eccentric wheel 4 for driving the sector-shaped swinging member 3 to swing left and right are provided in the plastic sub-housing 2. The sector-shaped swinging member 3 has an arc surface 5. Mounting seats 6 are respectively provided at both ends of the arc surface 5. Elastic pressing assemblies 7 are provided on both mounting seats 6. A fixed clamping portion 8 is provided at the inner side edge of the plastic sub-housing 2. The fixed clamping portion 8 is located between the two mounting seats 6. Any one of the elastic pressing assemblies 7 can jointly clamp the hose 9 with the fixed clamping portion 8. When the sector-shaped swinging member 3 rotates to the maximum position on the running track of the eccentric wheel along with the eccentric wheel 4, at this time, the pressing member 71 on the sector-shaped swinging member 3 tightly presses the hose 9 through the elastic force of the compression spring 72, so as to achieve the purpose of preventing the hose 9 from leaking water.
[0027] Preferably, a plastic gear set 10 is provided in the plastic main housing 1. The bottom of the plastic main housing 1 is fixedly installed with a motor 11 through screws. The output shaft of the motor 11 is connected to the plastic gear set 10. The plastic gear set 10 is connected to the eccentric wheel 4 through a transmission rod.
[0028] Preferably, a roller rod 41 is provided at the edge of the eccentric wheel 4. One end of the roller rod 41 is connected to a push block 42. A roller 43 is sleeved on the roller rod 41. One end of the push block 42 is connected to the middle of the eccentric wheel 4 through a fixing rod 44.
[0029] Preferably, a push block through hole 31 is provided in the middle of the sector swing member 3. The side wall of the push block through hole 31 has a roller running track 32. The roller running track 32 has two limit positions 33. The roller 43 can slide between the two limit positions 33. Using a roller to achieve the guiding movement can reduce the friction between the accessories, reduce the wear of the accessories, and improve the service life of the product.
[0030] Preferably, mounting grooves 61 are provided on both of the two mounting seats 6. The elastic extrusion assembly 7 is arranged in the mounting groove 61 and fixed and limited by a fixing member 12.
[0031] Preferably, the elastic extrusion assembly 7 includes an extrusion member 71 and a compression spring 72. A compression spring fixing column 73 is provided on one side of the extrusion member 71. The compression spring 72 is sleeved on the compression spring fixing column 73. An extrusion plate 74 is provided in the middle of the other side of the extrusion member 71. The cross section of the extrusion plate 74 is U-shaped.
[0032] Preferably, hose through holes 13 are respectively provided on both sides of the bottom of the plastic sub-housing 2 where the fixed clamping portion 8 is located. The hose 9 passes through the hose through holes 13.
[0033] Preferably, a plastic cover plate 21 is covered on the plastic sub-housing 2 and fixed by cover plate screws 22. A plurality of stud bolts 23 are provided at intervals on the bottom of the plastic sub-housing 2. A plurality of screw buckling ears 14 are provided at intervals on the outer side surface of the plastic main housing 1. Each screw buckling ear 14 is penetrated by a fixing screw 15. The fixing screw 15 is connected to the stud bolt 23. A positioning shaft 25 is further provided in the plastic sub-housing 2. The sector swing member 3 is connected to the positioning shaft 25. A torsion spring 26 is provided on the positioning shaft 25. Both torsion spring extending portions of the torsion spring 26 abut against the two side edges of the sector swing member 3.
[0034] Preferably, the plastic gear set 10 includes a driving helical gear 101, an intermediate gear pair 102, and an output spur gear 103. The output spur gear 103 is arranged at the bottom of the eccentric wheel 4 and is coaxial. The intermediate gear pair 102 includes an intermediate helical gear 1021 and an intermediate spur gear 1022. The intermediate helical gear 1021 and the intermediate spur gear 1022 are coaxial. The driving helical gear 101 meshes with the intermediate helical gear 1021. The intermediate spur gear 1022 meshes with the output spur gear 103.
[0035] Preferably, a hose mounting hole 24 is provided on the plastic cover plate 21. The hose mounting hole 24 corresponds to the fixed clamping portion 8. The hose 9 is bent into a U shape and passes through the two hose through holes 24.
[0036] Although the embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and structures of the present utility model, and the scope of the present utility model is defined by the appended claims and their equivalents.
Claims
1. A plastic gear box for preventing hose leakage, characterized in that: It comprises a plastic main shell and a plastic sub-shell, wherein the plastic main shell is arranged on an outer side of the plastic sub-shell, and a fan-shaped swinging member and an eccentric wheel for driving the fan-shaped swinging member to swing left and right are arranged in the plastic sub-shell, wherein the fan-shaped swinging member has an arc surface, and mounting seats are respectively arranged at both ends of the arc surface, and elastic extrusion components are arranged on the two mounting seats, and a fixed clamping part is arranged on the inner side edge of the plastic sub-shell, and the fixed clamping part is located between the two mounting seats, and any one of the elastic extrusion components can clamp the hose together with the fixed clamping part.
2. The plastic gear box for preventing hose leakage according to claim 1, characterized in that: A plastic gear set is arranged in the plastic main housing, a motor is fixedly mounted on the bottom of the plastic main housing by screws, an output shaft of the motor is connected to the plastic gear set, and the plastic gear set is connected to the eccentric wheel via a transmission rod.
3. The plastic gear box for preventing hose leakage according to claim 2, characterized in that: A roller rod is provided at the edge of the eccentric wheel, the end of the roller rod is connected to a push block, a roller is sleeved on the roller rod, and one end of the push block is connected to the middle of the eccentric wheel through a fixing rod.
4. The plastic gear box for preventing hose leakage according to claim 3, characterized in that: A push block extension hole is provided in the middle of the fan-shaped swinging member, and a roller running track is provided on the side wall of the push block extension hole. The roller running track has two extreme positions, and the roller can slide between the two extreme positions.
5. The plastic gear box for preventing hose leakage according to claim 1, characterized in that: Both mounting seats are provided with mounting grooves, the elastic extrusion assembly is arranged in the mounting grooves and is fixed and limited by a fixing piece.
6. The plastic gear box for preventing hose leakage according to claim 1, characterized in that: The elastic extrusion assembly includes an extrusion piece and a compression spring. A compression spring fixing column is provided on one side of the extrusion piece, and the compression spring is sleeved on the compression spring fixing column. An extrusion plate is provided in the middle of the other side of the extrusion piece, and the cross section of the extrusion plate is U-shaped.
7. The plastic gear box for preventing hose leakage according to claim 1, characterized in that: The bottom of the plastic auxiliary shell is located on both sides of the fixed clamping portion and is respectively provided with hose through holes, and the hose passes through the hose through holes.
8. The plastic gear box for preventing hose leakage according to claim 7, characterized in that: The plastic sub-shell is covered with a plastic cover plate and fixed with cover plate screws, a plurality of studs are arranged at intervals on the bottom of the plastic sub-shell, a plurality of screw buckle ears are arranged at intervals on the outer side surface of the plastic main shell, each screw buckle ear is penetrated with a fixing screw, and the fixing screw is connected to the stud; A positioning shaft is also provided in the plastic sub-shell, the fan-shaped swinging member is connected to the positioning shaft, a torsion spring is provided on the positioning shaft, and two torsion spring extensions of the torsion spring both abut against the edges on both sides of the fan-shaped swinging member.
9. The plastic gear box for preventing hose leakage according to claim 2, characterized in that: The plastic gear set includes a driving helical gear, an intermediate gear pair and an output spur gear, wherein the output spur gear is arranged at the bottom of the eccentric wheel and is coaxial, the intermediate gear pair includes an intermediate helical gear and an intermediate spur gear, the intermediate helical gear and the intermediate spur gear are coaxial, the driving helical gear is meshed with the intermediate helical gear, and the intermediate spur gear is meshed with the output spur gear.
10. The plastic gear box for preventing hose leakage according to claim 8, characterized in that: The plastic cover is provided with a hose installation hole, the hose installation hole corresponds to the fixed clamping portion, and the hose is bent into a U shape and passes through the two hose through holes.