Heat dissipation structure of piston pump

Abstract

The utility model discloses a heat dissipation structure of a piston pump, which is characterized in that a shell is provided with a motor, the shell is provided with a cylinder sleeve, the cylinder sleeve is connected with a cylinder cover assembly, and the cylinder cover assembly is used for air inlet and air outlet; a rotating shaft of the motor is connected with an eccentric wheel, the eccentric wheel is connected with a first end of a connecting rod, the motor drives the connecting rod to reciprocate, a leather cup is arranged at a second end of the connecting rod, and the leather cup is arranged in the cylinder sleeve; the motor is installed in the motor shell, heat dissipation holes are formed in the bottom of the motor shell, the heat dissipation holes are opposite to a coil of the motor, a fan is installed on a rotating shaft of the motor, the fan blows air or sucks air to the heat dissipation holes, and ventilation holes are formed in the shell. Through the fan, the heat dissipation efficiency of the motor coil is improved, and the high-frequency noise is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of piston pumps, in particular to a heat dissipation structure of a piston pump. Background Art

[0002] The existing piston pump drives the eccentric wheel to rotate through the motor, and the eccentric wheel drives the plunger with connecting rod to extend and retract, and the plunger cooperates with the cylinder sleeve to perform compression and exhaust.

[0003] In a piston pump with a short intake line, the compression cylinder liner can dissipate heat through unidirectional intake and exhaust, but the heat dissipation efficiency of the inner side of the cylinder liner, the connecting rod-eccentric wheel structure and the inside of the housing is not high.

[0004] Furthermore, in order to reduce the overall size of the pump, the drive motor is generally installed on the outer casing of the pump body. In addition to the heat generated by the drive motor itself during operation, the pump body will also transfer heat to it. Therefore, the piston pump not only needs to maintain a streamlined and compact structure, but also needs to ensure that the drive motor and other internal structures can be effectively cooled.

[0005] Therefore, there is an urgent need for a heat dissipation structure for a piston pump that can solve one or more of the above problems. Utility Model Content

[0006] In order to solve one or more problems existing in the prior art, the utility model provides a heat dissipation structure of a piston pump. The utility model adopts a technical solution to solve the above problems: a heat dissipation structure of a piston pump, which includes: a housing, a motor is installed on the housing, a cylinder sleeve is installed on the housing, the cylinder sleeve is connected to a cylinder head assembly, and the cylinder head assembly is used for air intake and air outlet;

[0007] The rotating shaft of the motor is connected to the eccentric wheel, the eccentric wheel is connected to the first end of the connecting rod, the motor drives the connecting rod to reciprocate, the second end of the connecting rod is provided with a leather cup, and the leather cup is installed in the cylinder sleeve;

[0008] The motor is installed in a motor housing, a heat dissipation hole is arranged at the bottom of the motor housing, a fan is installed on the rotating shaft of the motor, the fan is located between the motor housing and the connecting rod, and the housing is provided with ventilation holes, which are opposite to the sides of the fan.

[0009] In some embodiments, the motor is an outer rotor motor, and the airflow formed by the rotation of the fan is better for heat dissipation of this type of motor.

[0010] In some embodiments, the cylinder head assembly comprises: an end cover, a valve plate and a cylinder head, the cylinder head is connected to the cylinder sleeve, the valve plate is arranged between the end cover and the cylinder head, the end cover is connected to the cylinder head, and the end cover is provided with an air inlet and an air outlet;

[0011] When the air is discharged, the valve plate blocks the pipeline of the air inlet, and when the air is taken in, the valve plate blocks the pipeline of the air outlet.

[0012] Furthermore, the valve plate is provided with an air inlet plate and an air outlet plate, and the air inlet plate and the air outlet plate swing back and forth under the action of the airflow.

[0013] Further, the end cover is provided with an air outlet groove and an air inlet hole, the air outlet groove is communicated with the air outlet, and the air inlet hole is communicated with the air inlet;

[0014] The cylinder head is provided with an air inlet groove and an air outlet hole, and the air inlet groove and the air outlet hole are communicated with the cylinder liner;

[0015] The air inlet sheet is arranged between the air inlet hole and the air inlet groove, and the air inlet sheet blocks the air inlet hole. The air outlet sheet is arranged between the air outlet hole and the air outlet groove, and the air outlet sheet blocks the air outlet hole.

[0016] In some embodiments, the housing is provided with a through hole, the through hole is opposite to the rotating end of the connecting rod, and the rotating end of the connecting rod will approach or move away from the through hole when rotating.

[0017] Further, the through hole is arranged on the side wall of the housing, and the through hole is arranged opposite to the side surface of the rotating end of the connecting rod;

[0018] When the rotating end of the connecting rod is opposite to the through hole, its projection area on the through hole is smaller than the area of ​​the through hole. Furthermore, a plurality of heat dissipation holes are arranged around the rotating shaft of the motor.

[0019] The beneficial value achieved by the utility model is that the utility model can directly blow or suck air to the coil inside the motor by setting the heat dissipation holes and the fan, thereby improving the heat dissipation efficiency of the motor;

[0020] A turbofan heat dissipation structure can also be formed, with heat dissipation holes on both sides of the fan, one side for air intake and the other side for air outlet, so that the fan can be driven to rotate while the motor drives the eccentric wheel, so as to achieve the purpose of active heat dissipation of itself, and improve the heat exchange efficiency between the space between the connecting rod and the motor housing and the outside, while the motor end is hotter than this space, thereby forming a heat exchange airflow, and the motor can efficiently dissipate heat through the above heat dissipation holes;

[0021] When the motor drives the connecting rod to rotate at high speed, the high-speed rotating connecting rod is equivalent to a plane, which will hinder the fan from exhausting or taking in air downwards, resulting in a decrease in active heat dissipation efficiency. The formed turbofan heat dissipation structure exhausts and takes in air from both sides and will not be affected by this plane. It can achieve better active heat dissipation effect and will not cause dust accumulation on the connecting rod and its lower end, avoiding affecting the transmission effect.

[0022] Furthermore, when the motor drives the fan to rotate, the noise generated by the fan rotation will neutralize the noise generated by the motor, ultimately achieving the effect of reducing high-frequency noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the utility model;

[0024] Figure 2 It is an exploded view of the utility model;

[0025] Figure 3 It is an internal schematic diagram of the utility model;

[0026] Figure 4 It is an exploded view of the cylinder head assembly of the present utility model.

[0027] [Reference Signs]

[0028] 1…housing 10…cavity 11…installation portion 12…through hole 13…connecting rod 14…ventilation hole 2…cylinder head assembly 20…end cover 201…air outlet 202…air inlet 203…air outlet groove 204…air inlet hole 21…valve plate 210…air outlet plate 211…air inlet plate 22…cylinder head 220…air outlet hole 221…air inlet groove 3…motor 30…rotating shaft 31…eccentric wheel 32…motor housing 320…heat dissipation hole 33…fan 4…connecting rod 5…cylinder liner 6…leather cup DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the utility model more understandable, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from this description, and those skilled in the art can make similar improvements without violating the connotation of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed below.

[0030] like Figure 1-Figure 3As shown, the utility model discloses a heat dissipation structure of a piston pump, which comprises: a housing 1, the housing 1 is provided with a cavity 10 and a mounting portion 11, the mounting portion 11 is communicated with the cavity 10, a motor 3 is mounted in the cavity 10, a cylinder sleeve 5 is mounted on the mounting portion 11, the free end of the cylinder sleeve 5 is connected to a cylinder head assembly 2, and the cylinder head assembly 2 is used for air intake and air outlet;

[0031] The rotating shaft 30 of the motor 3 is connected to the eccentric wheel 31, and the eccentric wheel 31 is connected to the first end of the connecting rod 4. The motor 3 drives the connecting rod 4 to reciprocate. The second end of the connecting rod 4 is provided with a leather cup 6, and the leather cup 6 is installed in the cylinder sleeve 5.

[0032] When the shaft 30 of the motor 3 rotates, the eccentric wheel 31 is driven to rotate, and the eccentric wheel 31 drives the connecting rod 4 and the leather cup 6 to reciprocate in the cylinder sleeve 5. At this time, the volume of the cylinder sleeve 5 changes, thereby achieving air compression and discharge;

[0033] The motor 3 is sleeved in the motor housing 32, and a heat dissipation hole 320 is provided at the bottom of the motor housing 32. A fan 33 is installed on the rotating shaft 30 of the motor 3, and the fan 33 is located between the motor housing 32 and the connecting rod 4. The housing 1 is provided with ventilation holes 14, and the ventilation holes 14 are opposite to the side of the fan 33. The ventilation holes 14 are provided on both sides of the fan 33. Furthermore, the motor 3 can be an outer rotor motor. This type of motor has a better effect of active heat dissipation and also meets the requirements of driving the connecting rod 4 and the fan 33.

[0034] The heat dissipation holes 14 face the internal coils of the motor 3 , and under the action of the fan 33 (blowing or sucking air), active heat dissipation of the internal coils of the motor 3 is achieved.

[0035] In some embodiments, a gap for air flow is formed between the cylinder sleeve 5 and the housing 1, that is, a gap is formed between the cylinder sleeve 5 and the mounting portion 11; when the leather cup 6 reciprocates, the outside air will enter and exit the cylinder sleeve 5 through the gap, and the outside air will flow through the interior of the housing 1, thereby improving the overall heat dissipation efficiency. During the reciprocating motion of the leather cup 6, not only the volume of the cylinder sleeve 5 changes, but also the volume of the housing 1 changes, that is, the leather cup 6 also evacuates and inhales air from the interior of the housing 1, so under high-speed reciprocating motion, the gap and the heat dissipation holes 4 can generate airflow for heat dissipation.

[0036] Combination Figure 3As shown, the heat dissipation holes 14 are provided in plurality around the rotating shaft 30 of the motor 3 to improve the heat dissipation efficiency. The fan 33 and the ventilation holes 14 can form a turbofan heat dissipation structure, and the ventilation holes 14 on both sides are used for air intake and exhaust respectively, and can also directly blow or suck air toward the heat dissipation holes 14.

[0037] Specifically, combined Figure 2-Figure 4 As shown, the cylinder head assembly 2 includes: an end cover 20, a valve plate 21 and a cylinder head 22, the cylinder head 22 is connected to the cylinder sleeve 5, the valve plate 21 is arranged between the end cover 20 and the cylinder head 22, the end cover 20 is connected to the cylinder head 22, and the end cover 20 is provided with an air inlet 202 and an air outlet 201;

[0038] When the air is discharged, the valve plate 21 blocks the pipeline of the air inlet 202, and when the air is in, the valve plate 21 blocks the pipeline of the air outlet 201;

[0039] Furthermore, the valve plate 21 is provided with an air inlet plate 211 and an air outlet plate 210, and the air inlet plate 211 and the air outlet plate 210 swing back and forth under the action of the airflow;

[0040] The end cover 20 is provided with an air outlet groove 203 and an air inlet hole 204, the air outlet groove 203 is communicated with the air outlet 201, and the air inlet hole 204 is communicated with the air inlet 202;

[0041] The cylinder head 22 is provided with an air inlet groove 221 and an air outlet hole 220, and the air inlet groove 221 and the air outlet hole 220 are communicated with the cylinder sleeve 5;

[0042] The air inlet sheet 211 is disposed between the air inlet hole 204 and the air inlet groove 221, and the air inlet sheet 211 blocks the air inlet hole 204. The air outlet sheet 210 is disposed between the air outlet hole 220 and the air outlet groove 203, and the air outlet sheet 210 blocks the air outlet hole 220.

[0043] For example, when the air is discharged, the air outlet plate 210 is pressed into the air outlet groove 203 by the air flow, and the air outlet groove 203 is connected with the air outlet hole 220. Under the action of the air flow, the air inlet plate 211 blocks the air inlet hole 204, and the air inlet groove 221 and the air inlet hole 204 are separated by the air inlet plate 211.

[0044] When air is taken in, the air intake sheet 211 is pressed into the air intake groove 221 by the air flow, and the air intake groove 221 is connected to the air intake hole 204 . Under the action of the air flow, the air outlet sheet 210 blocks the air outlet hole 220 , and the air outlet groove 203 and the air outlet hole 220 are isolated by the air outlet sheet 210 .

[0045] The airflow entering from the outside can enter the cylinder liner 5 for compression without passing through a relatively long pipeline or connecting air pipe. Therefore, the time for the incoming airflow to be heated by the components is very short, which enables the cylinder liner 5 and adjacent components to obtain more sufficient heat dissipation. At the same time, it meets the requirement that the air inlet 202 and the air outlet 201 are on the same side.

[0046] Specifically, combined Figure 1-Figure 3 As shown, the housing 1 is provided with a through hole 12, and the through hole 12 is opposite to the rotating end of the connecting rod 4, and the rotating end of the connecting rod 4 will be close to or away from the through hole 12 when rotating;

[0047] The through hole 12 can be arranged on the side wall of the housing 1, and the through hole 12 is arranged opposite to the side of the rotating end of the connecting rod 4, and the through hole 12 is also arranged opposite to the inner side of the cylinder sleeve 5. Under the high-speed rotation of the eccentric wheel 31, through the rotation of the connecting rod 4 and the through hole 12 (the connecting rod 4 reciprocates relative to the through hole 12), a strong airflow can be generated (exhausting when approaching each other and inhaling when moving away from each other) to achieve heat exchange, thereby ultimately improving the heat dissipation efficiency;

[0048] When the rotating end of the connecting rod 4 is opposite to the through hole 12 , its projected area on the through hole 12 is smaller than the area of ​​the through hole 12 , so as to enhance the heat dissipation efficiency.

[0049] Again, combined Figure 1-Figure 2 As shown, the mounting portion 11 of the housing 1 is fixedly connected to the cylinder head assembly 2 through a connecting rod 13, and a portion of the cylinder sleeve 5 is exposed to the outside to improve the heat dissipation efficiency of the cylinder sleeve 5. At the same time, the components are combined through the connecting rod 13 to ensure the connection strength between the components and avoid direct connection and fixation through the cylinder sleeve 5. Furthermore, the end cover 20 is provided with heat dissipation fins.

[0050] In summary, the utility model can directly blow or suck air to the coil inside the motor by providing the above-mentioned heat dissipation holes and the fan, thereby improving the heat dissipation efficiency of the motor;

[0051] A turbofan heat dissipation structure can also be formed, with heat dissipation holes on both sides of the fan, one side for air intake and the other side for air outlet, so that the fan can be driven to rotate while the motor drives the eccentric wheel, so as to achieve the purpose of active heat dissipation of itself, and improve the heat exchange efficiency between the space between the connecting rod and the motor housing and the outside, while the motor end is hotter than this space, thereby forming a heat exchange airflow, and the motor can efficiently dissipate heat through the above heat dissipation holes;

[0052] When the motor drives the connecting rod to rotate at high speed, the high-speed rotating connecting rod is equivalent to a plane, which will hinder the fan from exhausting or taking in air downwards, resulting in a decrease in active heat dissipation efficiency. The formed turbofan heat dissipation structure exhausts and takes in air from both sides and will not be affected by this plane. It can achieve better active heat dissipation effect and will not cause dust accumulation on the connecting rod and its lower end, avoiding affecting the transmission effect.

[0053] Furthermore, when the motor drives the fan to rotate, the noise generated by the fan rotation will neutralize the noise generated by the motor, ultimately achieving the effect of reducing high-frequency noise.

[0054] The above-described embodiments only express one or more implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as a limitation of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the attached claims.

Claims

1. A heat dissipation structure of a piston pump, characterized in that: include: A housing, wherein a motor is mounted on the housing, a cylinder sleeve is mounted on the housing, the cylinder sleeve is connected to a cylinder head assembly, and the cylinder head assembly is used for air intake and air discharge; The rotating shaft of the motor is connected to the eccentric wheel, the eccentric wheel is connected to the first end of the connecting rod, the motor drives the connecting rod to reciprocate, the second end of the connecting rod is provided with a leather cup, and the leather cup is installed in the cylinder sleeve; The motor is installed in a motor housing, a heat dissipation hole is arranged at the bottom of the motor housing, a fan is installed on the rotating shaft of the motor, the fan is located between the motor housing and the connecting rod, and the housing is provided with ventilation holes, which are opposite to the sides of the fan.

2. The heat dissipation structure of the piston pump according to claim 1, characterized in that: The motor is an outer rotor motor.

3. The heat dissipation structure of the piston pump according to claim 1, characterized in that: The cylinder head assembly comprises: an end cover, a valve plate and a cylinder head, the cylinder head is connected to the cylinder sleeve, the valve plate is arranged between the end cover and the cylinder head, the end cover is connected to the cylinder head, and the end cover is provided with an air inlet and an air outlet; When the air is discharged, the valve plate blocks the pipeline of the air inlet, and when the air is taken in, the valve plate blocks the pipeline of the air outlet.

4. The heat dissipation structure of the piston pump according to claim 3, characterized in that: The valve plate is provided with an air inlet plate and an air outlet plate, and the air inlet plate and the air outlet plate swing back and forth under the action of the airflow.

5. The heat dissipation structure of the piston pump according to claim 4, characterized in that: The end cover is provided with an air outlet groove and an air inlet hole, the air outlet groove is communicated with the air outlet, and the air inlet hole is communicated with the air inlet; The cylinder head is provided with an air inlet groove and an air outlet hole, and the air inlet groove and the air outlet hole are communicated with the cylinder liner; The air inlet sheet is arranged between the air inlet hole and the air inlet groove, and the air inlet sheet blocks the air inlet hole. The air outlet sheet is arranged between the air outlet hole and the air outlet groove, and the air outlet sheet blocks the air outlet hole.

6. The heat dissipation structure of the piston pump according to claim 1, characterized in that: The housing is provided with a through hole, and the through hole is opposite to the rotating end of the connecting rod. The rotating end of the connecting rod will be close to or away from the through hole when rotating.

7. The heat dissipation structure of the piston pump according to claim 6, characterized in that: The through hole is arranged on the side wall of the housing, and the through hole is arranged opposite to the side surface of the rotating end of the connecting rod; When the rotating end of the connecting rod is opposite to the through hole, its projected area on the through hole is smaller than the area of ​​the through hole.

8. The heat dissipation structure of a piston pump according to claim 1, characterized in that: A plurality of heat dissipation holes are arranged around the rotating shaft of the motor.

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