CN217081282U - Plunger pump power transmission assembly - Google Patents

Abstract

The utility model discloses a plunger pump power transmission subassembly, including planet carrier and eccentric shaft, be equipped with on the planet carrier with eccentric shaft rear end complex eccentric shaft hole, the material of eccentric shaft is the stainless steel, and the rear end of eccentric shaft is equipped with the planomum, and eccentric shaft hole is equipped with the spacing face with the planomum complex. The subassembly, the cooperation is stable, can transmit the moment of torsion (torque) that comes from the motor effectively, wherein, the eccentric shaft adopts the stainless steel, has rust-resistant, corrosion-resistant performance, does benefit to plunger pump's steady operation and life's extension.

Description

Plunger pump power transmission assembly

Technical Field

The utility model relates to a high pressure cleaner, concretely relates to high pressure cleaner's plunger pump.

Background

The double-headed plunger pump, referring to fig. 1 and 2, comprises a plunger pump body 30 provided with plunger through holes, plungers 50 fitted in the plunger through holes, eccentric bearings 51 fitted to the middle portions of the plungers, and eccentric shafts 20 fitted to the eccentric bearings, the eccentric shafts being driven by a motor through a speed reducer 10. Plunger chamber covers 32 are respectively installed on two sides of the plunger pump body, each plunger chamber cover and the plunger pump body form a plunger chamber, and two ends of the plunger are respectively located in the two plunger chambers. The plunger cavity is provided with a first type of one-way valve connected with the upper water inlet channel of the pump body, and the plunger cavity is provided with a second type of one-way valve connected with the upper water outlet channel of the pump body. Under the drive of the motor, the eccentric shaft 20 drives the plunger 50 to do reciprocating linear motion, and under the action of the motion of the plunger, external water enters the cavity of the plunger through the water inlet channel, is pressurized and then is sprayed out through the water outlet channel.

The plunger pump body is designed with an eccentric shaft channel, the eccentric shaft 20 passes through the eccentric shaft channel, the front end of the eccentric shaft is connected with an eccentric bearing 51, and the eccentric bearing is matched in a bearing groove in the middle of the plunger 50. The rear end of the eccentric shaft is connected with the output end of a speed reducer 10, and the input end of the speed reducer is connected with a motor shaft.

The reducer 10 is a planetary gear reducer, and includes a fixed gear ring 13 fitted in a reducer case 12, a planetary gear 14 fitted with the fixed gear ring, and a sun gear 15 fitted with the planetary gear, the sun gear being connected with a motor shaft, the planetary gear 14 being mounted on a planet carrier 11, the planet carrier being an output end of the reducer. The motor shaft rotates to drive the sun gear 15 to synchronously rotate, the sun gear drives the planet gears 14 and the planet carrier 11 to rotate in a speed reduction mode, the planet carrier drives the eccentric shaft 20 to synchronously rotate, and the planet carrier and the eccentric shaft are a pair of important components for transmitting the power of the motor to the plunger 50 through the speed reducer.

The eccentric shaft 20 is made of a steel member, such as 45 steel, which has sufficient rigidity and hardness to be connected to the carrier 11 (in a spline connection) to transmit torque. However, the eccentric shaft made of such a material is apt to rust over a long period of use. If adopt the stainless steel to make the eccentric shaft, though can reach rust-resistant purpose, the stainless steel is softer, is unfavorable for the transmission of moment of torsion, even is difficult to adopt spline connection's mode to connect eccentric shaft and planet carrier.

SUMMERY OF THE UTILITY MODEL

The utility model solves the technical problem that: in the case of the eccentric shaft made of stainless steel, how to make it possible to effectively transmit the torque (torque) from the carrier.

In order to solve the technical problem, the utility model provides a following technical scheme: plunger pump power transmission subassembly, including planet carrier and eccentric shaft, be equipped with on the planet carrier with eccentric shaft rear end complex eccentric shaft hole, the material of eccentric shaft is the stainless steel, the rear end of eccentric shaft is equipped with the planomum, eccentric shaft hole be equipped with the planomum complex spacing face.

The utility model discloses a flat surface and the cooperation of face and face of spacing face realize the moment of torsion transmission of planet carrier to the eccentric shaft to overcome stainless steel rigidity, hardness not high and should not adopt splined connection's drawback, make the power of motor can transmit for the eccentric shaft effectively through the reduction gear.

The subassembly, the cooperation is stable, can transmit the moment of torsion (torque) that comes from the motor effectively, wherein, the eccentric shaft adopts the stainless steel, has rust-resistant, corrosion-resistant performance, does benefit to plunger pump's steady operation and life's extension.

Drawings

The invention will be further explained with reference to the drawings:

FIG. 1 is a schematic view of a plunger pump;

FIG. 2 is a cross-sectional view (partially schematic) taken along line A-A of FIG. 1;

fig. 3 is a schematic view of the carrier 11;

fig. 4 is a full sectional view of the carrier 11;

fig. 5 is a schematic view of the eccentric shaft 20.

The symbols in the drawings illustrate that:

10. a speed reducer; 11. a planet carrier; 110. an eccentric shaft hole; 112. a limiting surface; 113. a small diameter bore section; 114. a large-diameter hole section; 115. a weight portion; 116. a planet gear shaft mounting hole site; 12. a reducer housing; 120. a threaded connector hole site; 13. fixing the gear ring; 14. a planetary gear; 15. a sun gear;

20. an eccentric shaft; 201. the step is formed at the joint of the middle-diameter shaft section and the large-diameter shaft section; 202. flat surface; 203. a small diameter shaft section; 204. a medium diameter shaft section; 205. a large-diameter shaft section; 21. a front support bearing; 22. a rear support bearing;

30. a plunger pump body; 31. an eccentric shaft channel; 32. a plunger chamber cover;

50. a plunger; 51. an eccentric bearing.

Detailed Description

Referring to fig. 3 and 4, the power transmission assembly of the plunger pump includes a planet carrier 11 and an eccentric shaft 20, the planet carrier is provided with an eccentric shaft hole 110 matched with the rear end of the eccentric shaft, the eccentric shaft is made of stainless steel, the rear end of the eccentric shaft 20 is provided with a flat surface 202, and the eccentric shaft hole is provided with a limit surface 112 matched with the flat surface.

Referring to fig. 2, the fixed gear ring 13 of the reducer 10 is fixedly arranged in the reducer housing, the motor shaft rotates to drive the sun gear 15 of the reducer to synchronously rotate, the sun gear drives the planet gears 14 and the planet carrier 11 to rotate in a speed reduction manner, and the planet carrier drives the eccentric shaft 20 to synchronously rotate through the limiting surface 112 and the flat surface 202.

The speed reducer 10 is mounted on the plunger pump body 20 through a screw connection, and the eccentric shaft 20 is mounted in the eccentric shaft passage 31 of the plunger pump body through a front support bearing 21 and a rear support bearing 22.

As a structural improvement, referring to fig. 3 to 5, the eccentric shaft hole 110 includes a small diameter hole section 113 and a large diameter hole section 114, and the stopper surface 112 is provided on the small diameter hole section. The rear half of the eccentric shaft 20 includes a small diameter shaft section 203, in which the flat surface 202 is provided, and a medium diameter shaft section 204. The small-diameter shaft section is matched with the small-diameter hole section, and the middle-diameter shaft section is matched with the large-diameter hole section, so that the flat surface 20 is accurately matched with the limiting surface 112 while the coaxiality of the eccentric shaft hole 110 and the eccentric shaft 20 is ensured, the flat surface is in full ground-surface contact with the limiting surface, and further the transmission of torque between the planet carrier 11 and the eccentric shaft 20 is facilitated.

The eccentric shaft 20 includes a large diameter shaft section 205 adjacent to the middle diameter shaft section 204, the front support bearing 21 is mounted on the large diameter shaft section 205, the rear support bearing 22 is mounted on the middle diameter shaft section 204 and abuts against a step 201 formed at the joint of the middle diameter shaft section 204 and the large diameter shaft section 205, and the step enables the eccentric shaft and the rear support bearing 22 to be mutually limited.

As a modification, the carrier 11 is provided with a weight portion 115 on the side of the eccentric shaft hole 110. The weight portion functions as a flywheel. The counterweight part 115 has a large moment of inertia, and during the linear reciprocating motion of the plunger 50, the plunger does not work continuously because the water pressure in the plunger chamber has different acting forces on the plunger, and the rotating speed of the eccentric shaft 20 and the planet carrier 11 is also changed. When the rotation speed of the carrier 11 increases, the kinetic energy of the weight portion 115 increases, and the energy is stored. When the rotational speed of the carrier 11 decreases, the kinetic energy of the weight portion 115 decreases, releasing the energy. In this manner, speed fluctuations during operation of the plunger 50 may be reduced.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims (4)

1. Plunger pump power transmission subassembly, including planet carrier (11) and eccentric shaft (20), be equipped with on the planet carrier with eccentric shaft rear end complex eccentric shaft hole (110), its characterized in that: the eccentric shaft is made of stainless steel, a flat surface (202) is arranged at the rear end of the eccentric shaft (20), and a limiting surface (112) matched with the flat surface is arranged in the eccentric shaft hole.

2. The plunger pump power transfer assembly of claim 1, wherein: the eccentric shaft hole (110) comprises a small-diameter hole section (113) and a large-diameter hole section (114), and the limiting surface (112) is arranged on the small-diameter hole section; the rear half part of the eccentric shaft (20) comprises a small-diameter shaft section (203) and a medium-diameter shaft section (204), and the flat surface (202) is arranged on the small-diameter shaft section; the small-diameter shaft section is matched with the small-diameter hole section, and the medium-diameter shaft section is matched with the large-diameter hole section.

3. The plunger pump power transfer assembly of claim 2, wherein: the eccentric shaft (20) includes a large diameter shaft section (205) adjacent to a medium diameter shaft section (204).

4. The plunger pump power transfer assembly of claim 1, wherein: the planet carrier (11) is provided with a weight portion (115) on the side of the eccentric shaft hole (110).

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