CN217401119U - Automobile ESC plunger pump - Google Patents
Automobile ESC plunger pump Download PDFInfo
- Publication number
- CN217401119U CN217401119U CN202220783550.5U CN202220783550U CN217401119U CN 217401119 U CN217401119 U CN 217401119U CN 202220783550 U CN202220783550 U CN 202220783550U CN 217401119 U CN217401119 U CN 217401119U
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- China
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- steel ball
- ball seat
- liquid inlet
- needle roller
- plunger pump
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Abstract
The utility model discloses a car ESC plunger pump. The liquid inlet steel ball seat is characterized by comprising a base body, a needle bearing penetrates through the top of the base body close to one side edge in a sliding mode, a low-pressure cavity and a high-pressure cavity are formed in the base body, a needle roller and a liquid inlet steel ball seat of which the left end is in interference fit with the right end of the needle roller are slidably embedded in the low-pressure cavity of the base body, the left end of the needle roller is in contact with the outer surface of the needle bearing, and a plunger head of a pump piston is in interference fit with the right end of the liquid inlet steel ball seat and made of the same material; the utility model provides a piston rod adopts the integral type design to be connected with the plastics piston head among the current plunger pump, through the motion repeatedly, leaks the risk in the tight fit seal department exists, and the plunger pump exit oil pressure is little on the contrary in the ESC working process, and the oil pressure distributes to each wheel time extension, and wheel braking distance extension appears, influences the problem of braking effect.
Description
Technical Field
The utility model belongs to the technical field of car ESC, concretely relates to car ESC plunger pump.
Background
The plunger pump is an important component in a hydraulic system, changes the volume of a sealed working cavity by means of the reciprocating motion of a plunger in a cylinder body to realize oil absorption and oil pressing, is used for an actuator (HCU) of an automobile electronic stability control system (ESC), measures the actual state of an automobile body through an automobile body sensor, automatically starts a motor to drive the plunger pump to reciprocate, automatically boosts and decompresses a wheel cylinder by the HCU, increases and decreases the braking pressure of the wheel cylinder, and ensures the lateral stability of the running of a vehicle.
However, in the existing plunger pump, a piston rod is connected with a plastic piston head in an integrated design, and through repeated movement and repeated movement, the tight fit sealing part has inner leakage risk, the oil pressure at the outlet of the plunger pump is small in the ESC working process, the time of distributing the oil pressure to each wheel is prolonged, the braking distance of the wheel is lengthened, and the braking effect is influenced.
SUMMERY OF THE UTILITY MODEL
To the problem that above-mentioned prior art exists, when finding current plunger pump in use through the analysis, the piston rod of iron system and plastic piston head adopt different materials to make in the feed liquor subassembly, and direct action can take place serious wear for a long time relapses, for this reason, the utility model provides an automobile ESC plunger pump, this automobile ESC plunger pump take and design the combination of feed liquor subassembly for kingpin and feed liquor steel ball seat, and the kingpin passes through feed liquor steel ball seat and plastic piston head assembly, has avoided kingpin and plastic piston head direct action for a long time and has leaded to the problem of serious wear to feed liquor ball seat and plastic piston head are made by the same kind of material, and the degree of wear of the two is less.
The purpose of the utility model is realized through the following technical scheme:
the ESC plunger pump comprises a base body, a needle bearing penetrates through the top of the base body close to one side edge in a sliding manner, a low-pressure cavity and a high-pressure cavity are formed in the base body, a needle roller and a liquid inlet steel ball seat with the left end in interference fit with the right end of the needle roller are slidably embedded in the low-pressure cavity of the base body, the left end of the needle roller is in contact with the outer surface of the needle bearing, a shaft sleeve, a check ring and a star-shaped sealing ring are sequentially sleeved on the outer surface of the needle roller close to the left end edge along the length of the needle roller, two liquid inlets are uniformly formed on the liquid inlet steel ball seat along the periphery, a liquid outlet steel ball seat is arranged in the high-pressure cavity of the base body, a compression cavity is formed in the liquid outlet steel ball seat, a pump piston plunger head is arranged in the compression cavity, the pump piston plunger head and the right end of the liquid inlet steel ball seat are in interference fit and are made of the same material, and a liquid inlet spring is arranged in the plunger head of the pump piston, and one end of the liquid inlet spring is provided with a liquid inlet sealing steel ball which is in contact with the opening of the liquid inlet steel ball seat.
Furthermore, a filter screen is arranged on the outer surface of one side of the liquid outlet steel bead seat, and the filter screen is sleeved on the outer surface of the liquid inlet steel bead seat.
Furthermore, a liquid inlet channel is formed in the position, close to one side edge, of the inner bottom surface of the low-pressure cavity of the base body, and a liquid outlet channel is formed in the position, close to one side edge, of the high-pressure cavity of the base body.
Furthermore, a sealing cover with two oil outlet grooves is arranged on the outer surface of one side of the liquid outlet steel ball seat, a liquid outlet spring is arranged inside the sealing cover, and a liquid outlet sealing steel ball which is abutted to the opening of the liquid outlet steel ball seat is arranged at one end of the liquid outlet spring.
Furthermore, a return spring is arranged on the inner surface wall of one side of the compression cavity, the return spring is sleeved on the outer surface of the plunger head of the pump piston, and two ends of the return spring are ground flat.
Furthermore, the sealing conical surface of the liquid outlet steel ball seat is 70 degrees, the hardness of the sealing conical surface is HRC30-34, and the hardness of the liquid outlet sealing steel ball is HRC 53-58.
Furthermore, a gap of 0.3mm is reserved after the liquid outlet steel ball seat and the sealing cover are assembled, and the interference length of the needle roller and the liquid inlet steel ball seat is 2 mm.
Furthermore, both ends of the roller pin adopt fillets with the radius of 0.3 mm.
Furthermore, the hardness of the needle roller and the hardness of the needle roller bearing are set to be HRC 55-62.
The utility model discloses car ESC plunger pump has following beneficial effect at least:
1. the liquid inlet assembly of the ESC plunger pump is designed into a combination of a roller pin and a liquid inlet steel ball seat, and the liquid inlet ball seat is made of the same material as a plastic piston head, so that the problems that the piston rod in the existing plunger pump is connected with the plastic piston head in an integrated design, the inner leakage risk exists at a tight fit sealing part through repeated motion, the oil pressure at the outlet of the plunger pump is small in the working process of ESC, the time of distributing the oil pressure to each wheel is prolonged, the braking distance of the wheel is lengthened, and the braking effect is influenced are solved; and the rolling needle has the advantages of convenient processing and low surface friction as a standard component.
2. The sealing conical surface of the liquid outlet steel ball seat is 70 degrees, the hardness of the sealing conical surface is HRC30-34, the hardness of the liquid outlet sealing steel ball is HRC53-58, the hardness of the sealing surface of the liquid outlet steel ball seat is slightly lower than the surface hardness of the liquid outlet sealing steel ball, the contact surface is completely contacted with the spherical surface through the grinding pressure of the liquid outlet sealing steel ball on the contact surface, and the sealing effect is achieved;
3. the needle rollers and the liquid inlet steel ball seats are in interference assembly, the interference length is 2mm, and the needle rollers are prevented from falling off;
4. two liquid inlet holes are uniformly distributed on the liquid inlet steel ball seat, so that the liquid inlet efficiency is improved;
5. two liquid outlet channels are uniformly arranged at the sealing cover, so that the liquid outlet can achieve the effects of stability and throttling;
6. a space of 0.3mm is reserved after the liquid steel ball seat and the sealing cover are assembled, so that the liquid steel ball seat is ensured to be fully contacted with the sealing cover;
7. the radius of the fillet at the two ends of the roller pin is 0.3mm, so that the roller pin is ensured to be fully contacted with the liquid inlet steel ball seat, and the concentricity of the two parts is ensured;
8. the sliding friction between the needle roller and the needle roller bearing ensures that the hardness of the two parts is HRC55-62, thereby prolonging the service life of the pump.
Drawings
Fig. 1 is a schematic structural diagram of an ESC plunger pump of an automobile according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, in an embodiment, an ESC plunger pump for an automobile is provided, which includes a base 1, a needle bearing 2 slidably penetrates through a top of the base 1 near one side edge, a low pressure cavity 1a and a high pressure cavity 1b are opened inside the base 1, a needle roller 3 and a liquid inlet steel ball seat 4 with a left end in interference fit with a right end of the needle roller 3 are slidably inserted into the low pressure cavity 1a of the base 1.
In one embodiment, the two ends of the roller pin 3 are rounded with a radius of 0.3mm, and the roller pin 3 is made of Gcr15 material.
In one embodiment, the sealing surface of the liquid inlet steel ball seat 4 is a 55-degree conical surface, the roller pin 3 and the liquid inlet steel ball seat 4 are in interference fit, and the interference length is 2mm, so that the roller pin 3 is prevented from falling off.
The left end of the needle roller 3 is contacted with the outer surface of the needle roller bearing 2, in one embodiment, the sliding friction between the needle roller 3 and the needle roller bearing 2, and the hardness of the needle roller 3 and the hardness of the needle roller bearing 2 are both HRC55-62, so that the service life of the pump is prolonged. The surface of kingpin 3 is close to left end edge and is equipped with axle sleeve 5 along kingpin 3's length in proper order, retaining ring 6, star seal circle 7 seals kingpin 3 and base member 1, when receiving hydraulic pressure, star seal circle 7 is difficult to crowd into kingpin 3 and base member 1's gap, axle sleeve 5 adopts wear-resisting self-lubricating non-metallic material, increase non-metallic axle sleeve 5, the wearability is better, feed liquor steel ball seat 4 evenly is equipped with two inlets all around, the feed liquor is more steady, reduce the pressure oscillation. A liquid steel ball seat 8 is arranged in the high-pressure cavity 1b of the matrix 1, for example, the liquid steel ball seat 8 is in interference fit with the matrix 1 for hard sealing. A compression cavity 9 is formed in the liquid steel ball seat 8, a pump piston plunger head 10 is arranged in the compression cavity 9, the pump piston plunger head 10 and the right end of the liquid steel ball seat 4 are in interference fit, the right end of the liquid steel ball seat and the right end of the liquid steel ball seat are made of the same material, the high-pressure cavity 1b and the low-pressure cavity 1a are sealed and isolated by the pump piston plunger head 10 made of a plastic part, the size of a sealing lip of the pump piston plunger head 10 is preferably 0.2mm-0.5mm, the pump piston plunger head 10 is made of a wear-resistant non-metal material, the pump piston plunger head 10 and the liquid steel ball seat 4 can be made of PEEK-450CA30 materials, a 9-degree inclined plane is arranged at the sealing position of the pump piston plunger head 10, when the pressure of the compression cavity 9 rises, the inclined plane can expand outwards, and the sealing force between the sealing lip of the pump piston plunger head 10 and the liquid steel ball seat 8 is larger.
A liquid inlet spring 11 is arranged in the pump piston plunger head 10, and one end of the liquid inlet spring 11 is provided with a liquid inlet sealing steel ball 12 which is in contact with the opening of the liquid inlet steel ball seat 4.
Furthermore, a filter screen 13 is arranged on the outer surface of one side of the liquid outlet steel bead seat 8, the filter screen 13 is sleeved on the outer surface of the liquid inlet steel bead seat 4, and particularly at the liquid inlet, foreign matters are prevented from entering the sealing port to influence the sealing effect.
Further, a liquid inlet channel 14 is formed in the bottom surface of the inner portion of the low pressure cavity 1a of the base 1 near one side edge, and a liquid outlet channel 15 is formed in the side edge of the high pressure cavity 1b of the base 1.
Further, a sealing cover 16 with two oil outlet grooves is arranged on the outer surface of one side of the liquid outlet steel ball seat 8, liquid outlet can achieve the effects of stability and throttling, a liquid outlet spring 17 is arranged inside the sealing cover 16, and a liquid outlet sealing steel ball 18 which is in contact with an opening of the liquid outlet steel ball seat 8 is arranged at one end of the liquid outlet spring 17.
Furthermore, a return spring 19 is arranged on the inner surface wall of one side of the compression cavity 9, the return spring 19 is sleeved on the outer surface of the piston plunger head 10 of the pump, and two ends of the return spring 19 are ground flat, so that the verticality is better in reciprocating motion, the HCU continuously pumps oil to the wheel cylinder, and the braking pressure of the wheel cylinder is effectively reduced.
Furthermore, the sealing conical surface of the liquid steel ball seat 8 is 70 degrees, the hardness is HRC30-34, the hardness of the liquid steel sealing ball 18 is HRC53-58, the hardness of the sealing surface of the liquid steel ball seat 8 is slightly lower than the surface hardness of the liquid steel sealing ball 18, the complete contact between the spherical surface and the surface is achieved through the grinding pressure of the liquid steel sealing ball 18 on the contact surface, and the sealing effect is achieved.
Furthermore, a space of 0.3mm is reserved after the liquid outlet steel ball seat 8 and the sealing cover 16 are assembled, and the interference length of the roller pin 3 and the liquid inlet steel ball seat 4 is 2mm, so that the full contact between the roller pin 3 and the liquid inlet steel ball seat 4 is ensured, and the concentricity of the two parts is also ensured.
The liquid inlet assembly is designed into the combination of the roller pin 3 and the liquid inlet steel ball seat 4, the roller pin 3 is assembled with the plastic piston head through the liquid inlet steel ball seat 4, the problem of serious abrasion caused by long-time repeated direct action of the roller pin 3 and the plastic piston head is solved, and the liquid inlet steel ball seat 4 and the plastic piston head are both made of the same material and have smaller abrasion degree. The plunger pump solves the problems that a piston rod in the existing plunger pump is connected with a plastic piston head in an integrated design, the tight fit sealing position has inner leakage risk after repeated movement, the oil pressure at the outlet of the plunger pump is small in the ESC working process, the time of distributing the oil pressure to each wheel is prolonged, the braking distance of the wheel is lengthened, and the braking effect is influenced; and the roller pin 3 has the advantages of convenient processing and low surface friction as a standard component.
The sealing conical surface of the liquid steel ball seat 8 is 70 degrees, the hardness of the sealing conical surface is HRC30-34, the hardness of the liquid steel sealing ball 18 is HRC53-58, the hardness of the sealing surface of the liquid steel ball seat 8 is slightly lower than the surface hardness of the liquid steel sealing ball 18, the complete contact between the spherical surface and the surface is achieved through the grinding pressure of the liquid steel sealing ball 18 on the contact surface, and the sealing effect is achieved.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention within the knowledge range of those skilled in the art. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
Claims (9)
1. An automobile ESC plunger pump, includes the base member, its characterized in that: a needle roller bearing penetrates through the top of the base body close to one side edge in a sliding manner, a low-pressure cavity and a high-pressure cavity are formed in the base body, a needle roller and a liquid inlet steel ball seat with the left end in interference fit with the right end of the needle roller are slidably embedded in the low-pressure cavity of the base body, the left end of the needle roller is in contact with the outer surface of the needle roller bearing, a shaft sleeve, a check ring and a star-shaped sealing ring are sequentially sleeved on the outer surface of the needle roller close to the left end edge along the length of the needle roller, two liquid inlet ports are uniformly formed in the periphery of the steel ball seat along the periphery of the steel ball seat, a liquid outlet steel ball seat is arranged in the high-pressure cavity of the base body, a compression cavity is formed in the liquid outlet steel ball seat, a pump piston plunger head is arranged in the compression cavity, the pump piston plunger head and the right end of the liquid inlet steel ball seat are in interference fit and are made of the same materials, and a liquid inlet spring is arranged in the pump piston plunger head, one end of the liquid inlet spring is provided with a liquid inlet sealing steel ball which is abutted against the opening of the liquid inlet steel ball seat.
2. The ESC plunger pump of claim 1, wherein a filter screen is arranged on the outer surface of one side of the liquid outlet steel ball seat, and the filter screen is sleeved on the outer surface of the liquid inlet steel ball seat.
3. The ESC plunger pump in accordance with claim 1, wherein the inlet channel is formed on the bottom surface of the base body near one side edge of the low pressure chamber, and the outlet channel is formed on the high pressure chamber side edge of the base body.
4. The ESC plunger pump of claim 1, wherein a sealing cover with two oil outlet grooves is arranged on the outer surface of one side of the liquid outlet steel ball seat, a liquid outlet spring is arranged in the sealing cover, and a liquid outlet sealing steel ball which is in contact with the open hole of the liquid outlet steel ball seat is arranged at one end of the liquid outlet spring.
5. The ESC plunger pump in the automobile of claim 1, wherein a return spring is disposed on an inner surface wall of one side of the compression chamber, the return spring is sleeved on an outer surface of the plunger head of the pump piston, and two ends of the return spring are ground flat.
6. The ESC plunger pump of claim 1, wherein the sealing taper surface of the tapping ball seat is 70 ° and HRC30-34 hardness, and the tapping sealing ball is HRC53-58 hardness.
7. The ESC plunger pump of claim 4, wherein the distance between the liquid outlet steel ball seat and the seal cover is reserved 0.3mm, and the interference length between the needle roller and the liquid inlet steel ball seat is 2 mm.
8. The automotive ESC plunger pump according to claim 1, wherein the needle rollers are rounded at both ends with a radius of 0.3 mm.
9. The automotive ESC plunger pump according to claim 1, wherein the needle rollers and the needle roller bearings are each set to HRC55-62 hardness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220783550.5U CN217401119U (en) | 2022-04-06 | 2022-04-06 | Automobile ESC plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220783550.5U CN217401119U (en) | 2022-04-06 | 2022-04-06 | Automobile ESC plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217401119U true CN217401119U (en) | 2022-09-09 |
Family
ID=83140158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220783550.5U Active CN217401119U (en) | 2022-04-06 | 2022-04-06 | Automobile ESC plunger pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217401119U (en) |
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2022
- 2022-04-06 CN CN202220783550.5U patent/CN217401119U/en active Active
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