Helical tooth speed reducing mechanism of high-pressure cleaning machine

Abstract

The utility model provides a helical tooth speed reducing mechanism of a high-pressure cleaning machine, and belongs to the technical field of high-pressure cleaning machines. The problems that an existing straight gear is large in transmission error and noise are solved. The helical tooth speed reducing mechanism of the high-pressure cleaning machine comprises an oil cylinder with a gear chamber and a base which is fixedly connected with the lower end of the oil cylinder and seals the gear chamber, a gear shaft is arranged in the oil cylinder, a driven helical gear arranged on the gear shaft in a sleeving mode is arranged in the gear chamber, and a driving helical gear is arranged in the gear chamber. The upper end of the driving bevel gear is rotationally connected to the oil cylinder, the lower end of the driving bevel gear is rotationally connected to the base, and the driving bevel gear is meshed with the driven bevel gear. According to the structure, a traditional straight gear transmission assembly is replaced by the bevel gear transmission assembly, the gear contact face of the bevel gear transmission assembly is the oblique straight line, gear errors can be better compensated, transmission is more stable, noise is low, and the temperature of a gear chamber is lower.

Description

Technical Field

[0001] This utility model belongs to the technical field of high-pressure cleaners, and in particular, it relates to a helical gear reduction mechanism for a high-pressure cleaner. Background Technology

[0002] A high-pressure washer uses a power unit to drive a high-pressure plunger pump to generate high-pressure water, which is then sprayed out through a spray gun. When the impact force of the water is greater than the adhesion between the dirt and the object's surface, it can wash away the dirt, thus cleaning the object's surface. The high-pressure washer's motor pump unit consists of a high-pressure pump assembly, a hydraulic cylinder assembly, and the high-pressure washer motor pump unit itself. The output end of the high-pressure washer motor pump unit is equipped with a small gear, and the hydraulic cylinder assembly is equipped with a large gear, a gear shaft, a swashplate, and a surface bearing.

[0003] Currently, the China Patent Network discloses a plunger pump for a high-pressure washer [Authorization Announcement No.: CN211144717U], which includes a plunger frame, a pump body, a transmission assembly disposed within the pump body, and a bracket and a motor disposed at the bottom of the pump body. The transmission assembly includes a gear shaft driven by the motor, a swashplate, a retaining ring, and a plunger. The gear shaft passes through the swashplate and a bearing and drives it to rotate. An extension is provided at the center of the swashplate along the eccentric axis. The retaining ring is fitted onto the extension and abuts against the inclined surface of the swashplate. The ball head of the plunger contacts the retaining ring. A large gear is fitted onto the gear shaft. After actual assembly, a small gear is disposed inside the base on one side of the large gear. The small gear meshes with the large gear. The motor shaft extends into the base and connects to the small gear. After the motor works, it drives the small gear to rotate, and the small gear drives the large gear to rotate.

[0004] The aforementioned transmission component structure has the following defects: the teeth on both the large and small gears are spur teeth, and the meshing contact line of the spur gears is a straight line parallel to the gear axis, resulting in a large transmission error and the tendency to generate additional strength during contact, thereby increasing vibration and noise. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a helical gear reduction mechanism for a high-pressure cleaner. The technical problem this invention aims to solve is how to address the issues of large errors and high noise levels in existing spur gear transmissions.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A helical gear reduction mechanism for a high-pressure washer includes a cylinder with a gear chamber and a base fixedly connected to and sealing the gear chamber at the lower end of the cylinder. A gear shaft is provided inside the cylinder. The gear chamber contains a driven helical gear sleeved on the gear shaft and a driving helical gear. The upper end of the driving helical gear is rotatably connected to the cylinder and the lower end is rotatably connected to the base. The driving helical gear and the driven helical gear mesh with each other.

[0008] This structure replaces the traditional spur gear transmission assembly with a helical gear transmission assembly. The gear contact surface of the helical gear transmission assembly is a straight line, which can better compensate for gear errors, resulting in smoother transmission, less noise, and lower gear chamber temperature. Secondly, the driving helical gear in this structure is cylindrical and directly meshes with the driven helical gear. The upper end of the driving helical gear is rotatably connected to the hydraulic cylinder, and the lower end is rotatably connected to the base. Since both the upper and lower ends of the driving helical gear are supported, it has very good rotational stability. The motor shaft does not need to extend into the gear chamber, which facilitates the assembly of the motor shaft and the driving helical gear.

[0009] In the helical gear reduction mechanism of the aforementioned high-pressure washer, a bearing one is installed inside the cylinder, and a bearing two is installed on the base. The upper end of the driving helical gear passes through the bearing one, and the lower end passes through the bearing two. Bearing one and bearing two support the rotation of the driving helical gear, ensuring stable rotation of the driving helical gear.

[0010] In the helical gear reduction mechanism of the aforementioned high-pressure washer, a sealing ring is provided inside the base. The sealing ring is located below the bearing and is in close contact with the outer circumferential surface of the lower end of the drive helical gear. The gear chamber is in a closed state. To ensure a longer service life for bearings one and two, the sealing ring improves the sealing effect at the assembly point between the drive helical gear and the base, preventing external dust from damaging bearing two and also preventing leakage of grease or lubricant.

[0011] In the aforementioned helical gear reduction mechanism of a high-pressure washer, a connecting hole is provided on the lower end face of the driving helical gear along the axial direction of the driving helical gear. The connecting hole is a flat hole. During assembly, the motor shaft only needs to be inserted into the connecting hole, which facilitates the assembly of the motor shaft and the driving helical gear. The flat hole design improves the ability of the motor shaft to directly drive the driving helical gear to rotate. The motor can be fixedly connected to the base via a bracket, and the fixed connection method is screw or bolt connection, which facilitates the disassembly and installation between the motor and the base when maintenance is required. In contrast, in the prior art, the motor shaft needs to extend into the gear chamber to facilitate the pinion gear to be fitted onto the motor shaft, and the motor shaft and the base are connected by a bearing to facilitate the rotation of the motor shaft. This structure makes the disassembly between the motor and the base very inconvenient.

[0012] In the helical gear reduction mechanism of the aforementioned high-pressure washer, a boss is formed around the gear chamber along the outer edge of the upper surface of the base. A sealing groove is formed on the upper end face of the boss, and a second sealing ring is embedded in the sealing groove. The lower end of the hydraulic cylinder has a sealing surface, which is in close contact with the second sealing ring. The assembly structure of the second sealing ring seals the contact surface between the base and the hydraulic cylinder, ensuring a good sealing effect in the gear chamber. External dust and impurities are not easily allowed to enter the gear chamber, and grease or lubricant leakage is also prevented.

[0013] In the helical gear reduction mechanism of the aforementioned high-pressure washer, the outer edge of the lower end of the hydraulic cylinder has a downwardly protruding positioning protrusion, which is sleeved on the outer side wall of the boss. The assembly structure of the positioning protrusion and the boss provides a pre-positioning effect for the base, facilitating the subsequent tightening of fasteners and improving the ease of assembling the base and the hydraulic cylinder.

[0014] Compared with the prior art, the helical gear reduction mechanism of the high-pressure washer of this utility model has the following advantages: This structure replaces the traditional spur gear transmission assembly with a helical gear transmission assembly. The gear contact surface of the helical gear transmission assembly is a straight line, which can better compensate for gear errors, making the transmission smoother, with less noise, and the temperature of the gear chamber is lower. Secondly, the driving helical gear in this structure is columnar, and the driving helical gear directly meshes with the driven helical gear. The upper end of the driving helical gear is rotatably connected to the oil cylinder, and the lower end is rotatably connected to the base. Since the upper and lower ends of the driving helical gear are supported, it has very good rotational stability. The motor shaft does not need to extend into the gear chamber, which facilitates the assembly of the motor shaft and the driving helical gear. Attached Figure Description

[0015] Figure 1 This is a cross-sectional structural diagram of the present invention.

[0016] Figure 2 yes Figure 1 A magnified structural diagram of part A in the middle.

[0017] Figure 3 This is a partial three-dimensional structural schematic diagram of the present invention.

[0018] In the diagram, 1 is the hydraulic cylinder; 2 is the base; 20 is the boss; 21 is the sealing groove; 3 is the gear chamber; 4 is the gear shaft; 5 is the driven helical gear; 6 is the driving helical gear; 60 is the connecting hole; 7 is the bearing one; 8 is the bearing two; 9 is the sealing ring one; 10 is the sealing ring two; 11 is the sealing surface; 12 is the positioning protrusion; and 13 is the motor shaft. Detailed Implementation

[0019] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0020] like Figure 1 , Figure 2 and Figure 3 As shown, the helical gear reduction mechanism of this high-pressure washer includes a cylinder 1 with a gear chamber 3, a base 2 fixedly connected to the lower end of the cylinder 1 and enclosing the gear chamber 3, a gear shaft 4 is provided inside the cylinder 1, a driven helical gear 5 is sleeved on the gear shaft 4 inside the gear chamber 3, and a driving helical gear 6 is provided inside the gear chamber 3. The driving helical gear 6 is columnar, with its upper end rotatably connected to the cylinder 1 and its lower end rotatably connected to the base 2. The driving helical gear 6 and the driven helical gear 5 mesh with each other. A connecting hole 60 is provided on the lower end face of the driving helical gear 6 along the axial direction of the driving helical gear 6. The connecting hole 60 is a flat hole, and the motor shaft 13 of the motor passes through the connecting hole 60. This structure replaces the traditional spur gear transmission assembly with a helical gear transmission assembly. The gear contact surface of the helical gear transmission assembly is a straight line, which can better compensate for gear errors, making the transmission smoother, with less noise, and the temperature of the gear chamber is lower. Secondly, the driving helical gear 6 in this structure is cylindrical and directly meshes with the driven helical gear 5. The upper end of the driving helical gear 6 is rotatably connected to the cylinder 1, and the lower end is rotatably connected to the base 2. Since the upper and lower ends of the driving helical gear 6 are supported, it has very good rotational stability. The motor shaft 13 does not need to extend into the gear chamber 3, which facilitates the assembly of the motor shaft 13 and the driving helical gear 6.

[0021] like Figure 1 As shown, bearing 7 is installed inside cylinder 1, and bearing 8 is installed on base 2. The upper end of the driving helical gear 6 passes through bearing 7, and the lower end passes through bearing 8. A sealing ring 9 is installed inside base 2, located below bearing 8, and is in close contact with the outer circumferential surface of the lower end of the driving helical gear 6. Gear chamber 3 is in a closed state. To ensure a longer service life for bearings 7 and 8, the sealing ring 9 improves the sealing effect at the assembly point between the driving helical gear 6 and base 2, preventing external dust from damaging bearings 7 and 8.

[0022] like Figure 1 and Figure 2 As shown, a boss 20 is formed around the gear chamber 3 at the outer edge of the upper surface of the base 2. A sealing groove 21 is formed on the upper end face of the boss 20, and a sealing ring 10 is embedded in the sealing groove 21. The lower end of the cylinder 1 has a sealing surface 11, which is in close contact with the sealing ring 10. The outer edge of the lower end of the cylinder 1 has a downwardly protruding positioning protrusion 12, which is fitted onto the outer side wall of the boss 20. The assembly structure of the sealing ring 10 seals the contact surface between the base 2 and the cylinder 1, ensuring that the gear chamber 3 has a good sealing effect, and preventing external dust and impurities from easily entering the gear chamber 3.

[0023] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A helical gear reduction mechanism for a high-pressure washer, comprising a cylinder (1) having a gear chamber (3), and a base (2) fixedly connected to and enclosing the gear chamber (3) at the lower end of the cylinder (1), wherein a gear shaft (4) is provided inside the cylinder (1), characterized in that, The gear chamber (3) is provided with a driven helical gear (5) sleeved on the gear shaft (4). The gear chamber (3) is provided with a driving helical gear (6). The driving helical gear (6) is columnar. The upper end of the driving helical gear (6) is rotatably connected to the oil cylinder (1), and the lower end is rotatably connected to the base (2). The driving helical gear (6) and the driven helical gear (5) mesh with each other.

2. The helical gear reduction mechanism of a high-pressure washer according to claim 1, characterized in that, The cylinder (1) is provided with a bearing (7), the base (2) is provided with a bearing (8), the upper end of the active helical gear (6) is inserted into the bearing (7), and the lower end is inserted into the bearing (8).

3. The helical gear reduction mechanism of a high-pressure washer according to claim 1, characterized in that, A connecting hole (60) is provided on the lower end face of the active helical gear (6) along the axial direction of the active helical gear (6), and the connecting hole (60) is a flat hole.

4. The helical gear reduction mechanism of a high-pressure washer according to claim 1, characterized in that, A boss (20) is formed around the gear chamber (3) at the outer edge of the upper surface of the base (2). A sealing groove (21) is provided on the upper end face of the boss (20). A sealing ring (10) is embedded in the sealing groove (21). The lower end of the oil cylinder (1) has a sealing surface (11). The sealing surface (11) is in close contact with the sealing ring (10).

5. The helical gear reduction mechanism of a high-pressure washer according to claim 4, characterized in that, The lower end of the cylinder (1) has a downwardly protruding positioning protrusion (12) on the outer edge, and the positioning protrusion (12) is sleeved on the outer side wall of the boss (20).

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