阅读说明：本技术 一种高压水泵活塞杆结构及一种高压水泵 (High pressure water pump piston rod structure and high pressure water pump ) 是由 贾辉祖 于 2020-06-09 设计创作，主要内容包括：本发明公开了一种高压水泵活塞杆结构及一种高压水泵,包括活塞杆,可设置在高压水泵的活塞腔内；复位件,所述复位件的上端与活塞杆连接,复位件的下端具有球头；弹簧,套设在活塞杆上,弹簧的下端与复位件相抵接；底座,可滑动设置在高压水泵的斜盘上,底座内具有与所述球头相适配的凹槽,所述球头设置在凹槽内；电机驱动斜盘转动时,带动活塞杆作往复运动,球头在底座的凹槽内做360°的周向运动,同时,底座在斜盘上具有水平上的位移,优点在于活塞杆在作往复运动时不会与其他部件造成机械上的磨损,且能够完全复位,不会产生异音。(The invention discloses a high-pressure water pump piston rod structure and a high-pressure water pump, which comprise a piston rod, wherein the piston rod can be arranged in a piston cavity of the high-pressure water pump; the upper end of the resetting piece is connected with the piston rod, and the lower end of the resetting piece is provided with a ball head; the spring is sleeved on the piston rod, and the lower end of the spring is abutted with the reset piece; the base is slidably arranged on a swash plate of the high-pressure water pump, a groove matched with the ball head is formed in the base, and the ball head is arranged in the groove; when the motor drives the swash plate to rotate, the piston rod is driven to do reciprocating motion, the ball head does 360-degree circumferential motion in the groove of the base, and meanwhile, the base has horizontal displacement on the swash plate.)

1. A high pressure water pump piston rod structure, characterized by, includes:

the piston rod (10) can be arranged in a piston cavity of the high-pressure water pump;

the upper end of the resetting piece (20) is connected with the piston rod (10), and the lower end of the resetting piece (20) is provided with a ball head (21);

the spring (30) is sleeved on the piston rod (10), and the lower end of the spring (30) is abutted with the reset piece (20);

the base (40) is arranged on a swash plate (50) of the high-pressure water pump in a sliding mode, a groove (41) matched with the ball head (21) is formed in the base (40), and the ball head (21) is arranged in the groove (41).

2. The piston rod structure of a high pressure water pump according to claim 1, wherein: the bottom surface of the ball head (21) is higher than the bottom surface of the base (40).

3. The piston rod structure of a high pressure water pump according to claim 1, wherein: the reset device further comprises a fixing structure, and the reset piece (20) is connected with the piston rod (10) through the fixing structure.

4. A high pressure water pump piston rod structure according to claim 3, characterized in that: the fixing structure comprises a stop screw (61), an internal thread (62) arranged in the lower end of the piston rod (10) and an external thread (63) arranged at the upper end of the reset piece (20), the external thread (63) is in threaded connection with the internal thread (62), a thread groove (64) is formed in the side wall of the piston rod (10), a limiting hole (65) is formed in the side wall of the reset piece (20), and the stop screw (61) is in threaded connection with the thread groove (64) and is inserted into the limiting hole (65).

5. The piston rod structure of a high pressure water pump according to claim 1, wherein: and a sliding sheet (70) arranged between the base (40) and the swash plate (50).

6. The piston rod structure of a high pressure water pump according to claim 5, wherein: the material of the slide (70) is provided as ceramic.

7. The piston rod structure of a high pressure water pump according to claim 1, wherein: the spring (30) is made of chrome vanadium steel.

8. A high pressure water pump characterized by: the high-pressure water pump comprises a shell, a pump body, a motor and a transmission case, wherein the pump body, the motor and the transmission case are arranged in the shell, the transmission case comprises a piston rod structure of the high-pressure water pump, a swash plate (50) and a piston cavity, an inlet hole and an outlet hole are formed in the pump body, the motor drives the swash plate (50) to rotate, the swash plate (50) drives the piston to reciprocate in the piston cavity, and water is sucked from the inlet hole and then is pressurized and pumped out of the outlet hole.

9. A high pressure water pump according to claim 8, characterized in that: the material of the swash plate (50) is carbon steel.

Technical Field

The invention relates to the field of high-pressure water pumps, in particular to a piston rod structure of a high-pressure water pump and the high-pressure water pump applying the piston rod structure.

Background

The piston of the common swash plate piston rod water pump is changed into reciprocating motion through the height difference of a plane generated by the rotating motion of a swash plate, the rotation from the low point to the high point of the swash plate is a pushing stroke, power comes from the rotating swash plate, but the swash plate goes downwards after passing the high point, the piston loses a return power source, and a spring is generally used as a rebound power; another method is to use the design of the disc lever, utilize the lever principle, have made a central top post in the centre, when the swash plate rises, the piston bulb of one end rises, then the disc lever sees through the lever action, pull back the piston of the reverse end, like patent No. 201120079919.6, its advantage is that there is not surplus power consumption really in movements, but there are some problems to run for many years, mainly through running for a long time, the concave position of the disc lever and bulb of the piston are abraded, therefore produced the interval, and produced the situation of the abnormal sound and pressure shaking too because of rubbing the scratch on the surface in the friction; meanwhile, because the distance between the piston and the central shaft and the stroke of the piston are not changed, and the swash plate has height difference in the rotating process, displacement can be generated horizontally, and if the displacement problem is not solved, the ball head of the piston is abraded or accompanied by abnormal sound.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a piston rod structure of a high-pressure water pump and the high-pressure water pump, which can solve the problems of abnormal sound and pressure jitter.

The technical scheme adopted by the embodiment of the invention for solving the technical problem is as follows: a high pressure water pump piston rod structure comprising:

the piston rod can be arranged in a piston cavity of the high-pressure water pump;

the upper end of the resetting piece is connected with the piston rod, and the lower end of the resetting piece is provided with a ball head;

the spring is sleeved on the piston rod, and the lower end of the spring is abutted with the reset piece;

the base is slidably arranged on a swash plate of the high-pressure water pump, a groove matched with the ball head is formed in the base, and the ball head is arranged in the groove.

Preferably, the bottom surface of the ball head is higher than the bottom surface of the base.

Further, the piston rod structure of the high-pressure water pump further comprises a fixing structure, and the resetting piece is connected with the piston rod through the fixing structure.

Preferably, the fixing structure comprises a stop screw, an internal thread arranged in the lower end of the piston rod and an external thread arranged at the upper end of the reset piece, the external thread is in threaded connection with the internal thread, a thread groove is formed in the side wall of the piston rod, a limiting hole is formed in the side wall of the reset piece, and the stop screw is in threaded connection with the thread groove and is inserted into the limiting hole.

Preferably, the piston rod structure of the high-pressure water pump further comprises a sliding sheet arranged between the base and the swash plate.

Preferably, the material of the slide is ceramic.

Preferably, the material of the spring is chrome vanadium steel.

Furthermore, a high pressure water pump, including the casing and set up the pump body, motor and transmission case in the casing, the transmission case includes a high pressure water pump piston rod structure, sloping cam plate and piston chamber, is equipped with inlet opening and apopore on the pump body, and motor drive sloping cam plate rotates, and sloping cam plate drive piston makes reciprocating motion in the piston chamber, pumps water from the inlet opening after the pressurization from the apopore.

Preferably, the material of the swash plate is carbon steel.

The invention has the beneficial effects that: a high pressure water pump piston rod structure and a high pressure water pump comprise a piston rod which can be arranged in a piston cavity of the high pressure water pump; the upper end of the resetting piece is connected with the piston rod, and the lower end of the resetting piece is provided with a ball head; the spring is sleeved on the piston rod, and the lower end of the spring is abutted with the reset piece; the base is slidably arranged on a swash plate of the high-pressure water pump, a groove matched with the ball head is formed in the base, and the ball head is arranged in the groove; when the motor drives the swash plate to rotate, the piston rod is driven to do reciprocating motion, the ball head does 360-degree circumferential motion in the groove of the base, and meanwhile, the base has horizontal displacement on the swash plate.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic view of a spring-return piston rod according to the prior art;

fig. 2 is a schematic structural view of a piston rod for resetting a reset plate in the prior art;

FIG. 3 is a schematic structural view of the present invention;

fig. 4 is a partially enlarged view of the area a in fig. 3.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the description of the present invention, a plurality of means is two or more, and greater than, less than, more than, etc. are understood as excluding the present number, and greater than, less than, etc. are understood as including the present number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless explicitly defined otherwise, the terms "disposed," "mounted," "connected," and the like are to be understood in a broad sense, and for example, may be directly connected or indirectly connected through an intermediate; can be fixedly connected, can also be detachably connected and can also be integrally formed; may be a mechanical connection; either as communication within the two elements or as an interactive relationship of the two elements. The specific meaning of the above-mentioned words in the present invention can be reasonably determined by those skilled in the art in combination with the detailed contents of the technical solutions.

Referring to fig. 3 to 4, a high pressure water pump piston rod structure includes:

the piston rod 10 can be arranged in a piston cavity of the high-pressure water pump;

the upper end of the resetting piece 20 is connected with the piston rod 10, and the lower end of the resetting piece is provided with a ball head 21;

the spring 30 is sleeved on the piston rod 10, and the lower end of the spring 30 is abutted with the reset piece 20;

the base 40 is slidably arranged on a swash plate 50 of the high-pressure water pump, a groove 41 matched with the ball head 21 is formed in the base 40, and the ball head 21 is arranged in the groove 41.

Referring to fig. 1, fig. 1 shows that a spring 30 is sleeved on a piston rod 10 in the prior art, the spring 30 abuts against a spring support 80, the return of the piston rod 10 is realized through the deformation and the deformation recovery of the spring 30, but the spring 30 is fatigued after long-time work, the return action of the piston rod cannot follow the rotating frequency, the motor drives a swash plate 50 to rotate at a speed of about one thousand times per minute, when the piston rod 10 is not yet returned, the swash plate 50 rises again, so that impact sound is generated, and the water pressure cannot reach the impact sound.

Referring to fig. 2, fig. 2 is a prior art design using a disc lever 90, and a central top pillar is made in the center of the disc lever 90 by using a lever principle, when a swash plate 50 is lifted, a ball 21 of a piston rod 10 at one end is lifted, and the disc lever 90 pulls back the piston rod 10 at the opposite end through a lever action.

In the invention, the piston rod 10 is inserted in the piston cavity of the high pressure water pump, the motor drives the swash plate 50 to do inclined rotary motion, the swash plate 50 generates height difference when rotating, thereby pushing the piston rod 10 to do reciprocating motion in the piston cavity, the rotary motion of the motor is converted into linear motion, the ball 21 on the reset piece 20 does 360-degree circumferential motion in the groove 41 of the base 40 in the motion process of the piston rod 10, because the groove 41 is matched with the ball 21, sliding friction is formed between the ball 21 and the groove 41, abrasion to the ball 21 or the groove 41 is avoided, meanwhile, because the distance between the piston rod 10 and the central shaft and the stroke of the piston rod 10 are fixed, but the swash plate 50 has height difference, when the piston rod 10 is in relative motion with the lowest point, namely the piston rod 10 is in radius R, and the swash plate 50 has a five-nine-degree inclination due to different strokes, therefore, a radius cosine-reduced displacement exists between the ball head 21 and the swash plate 50, dots of the originally designed ball head 21 are directly rubbed on the swash plate 50, all pressure is concentrated on one point, the ball head 21 and the swash plate 50 have horizontal displacement, and double friction is concentrated on one point, so that the balls are quickly worn, the base 40 and the swash plate 50 of the base 40 are only abutted, the base 40 can slide on the swash plate 50, the displacement is counteracted by the sliding of the base 40 on the swash plate 50, and the piston rod 10 cannot be pulled or the ball head 21 is not subjected to mechanical impact due to the displacement.

The bottom surface of the ball head 21 is higher than that of the base 40; the ball 21 is fully seated in the seat 40 and makes a 360 circumferential rotation in the seat 40.

The high-pressure water pump piston rod structure further comprises a fixing structure, and the resetting piece 20 is connected with the piston rod 10 through the fixing structure.

The fixing structure comprises a stop screw 61, an internal thread 62 arranged in the lower end of the piston rod 10 and an external thread 63 arranged at the upper end of the reset piece 20, the external thread 63 is in threaded connection with the internal thread 62, a thread groove 64 is formed in the side wall of the piston rod 10, a limiting hole 65 is formed in the side wall of the reset piece 20, and the stop screw 61 is in threaded connection with the thread groove 64 and is inserted into the limiting hole 65; because the piston rod 10 soaks in liquid, need keep not rustting, therefore the piston rod 10 uses SS316 stainless steel as the substrate, covers a layer of pottery on the piston rod 10 and increases the wearability, but because bulb 21 need bear stronger mechanical shock, consequently, bulb 21 adopts alloy steel material, reaches more than HRC55 degrees through thermal treatment, so during different materials, need connect through fixed knot structure, adopt threaded connection's mode to prevent rotating the restriction through the cooperation between stop screw 61 and the spacing hole 65.

The piston rod structure of the high-pressure water pump further comprises a sliding sheet 70 arranged between the base 40 and the swash plate 50; the material of the sliding sheet 70 is ceramic; the metal-to-metal friction between the swash plate 50 and the base 40 is reduced by the high hardness, high smoothness and low friction coefficient of the ceramic, and the power consumption and noise are reduced.

The spring 30 is made of chrome vanadium steel.

A high-pressure water pump comprises a shell, a pump body, a motor and a transmission case, wherein the pump body, the motor and the transmission case are arranged in the shell, the transmission case comprises a high-pressure water pump piston rod structure, a swash plate 50 and a piston cavity, a water inlet hole and a water outlet hole are formed in the pump body, the motor drives the swash plate 50 to rotate, the swash plate 50 drives the piston to reciprocate in the piston cavity, and water is pumped out of the water outlet hole in a pressurized mode after being sucked from the water inlet hole.

The material of the swash plate 50 is carbon steel; the former swash plate 50 is made of aluminum alloy, aluminum powder is generated in the friction process, lubricating oil is polluted, and carbon steel cannot be generated.

It is to be understood that the present invention is not limited to the above-described embodiments, and that equivalent modifications and substitutions may be made by those skilled in the art without departing from the spirit of the present invention, and that such equivalent modifications and substitutions are to be included within the scope of the appended claims.