Slide valve type manual pump

Abstract

The utility model discloses a slide valve type manual pump, and belongs to the technical field of automobile parts. The utility model aims to design an axial sliding type slide valve element reversing structure, and the slide valve type manual pump is small in occupied space in the operation process and convenient to reverse. A sliding valve cavity is formed in a pump body base, a sliding valve is inserted in the sliding valve cavity, a sliding valve limiting pin with a clamping groove is arranged on the outer side of the sliding valve cavity of the pump body base, and a sliding valve limiting rod is installed at the end of the sliding valve. An existing straight valve element structural form is modified, the structure is simple, operation and reversing are convenient, and another design thought is provided for a follow-up designer to design a manual pump.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts technology. Background Technology

[0002] Currently, when manual pumps are used in conjunction with differential cylinders, the cylinder is driven to rise and fall by rotating a straight valve core. The reversing operation of manual pumps requires a certain amount of space for rotation, and the structure is relatively simple. It is difficult to operate when the installation and operation space at the vehicle end is small. Summary of the Invention

[0003] The purpose of this utility model is to design an axial sliding valve core reversing structure, which occupies little space during operation and is convenient for reversing the valve type manual pump.

[0004] This utility model has a slide valve cavity inside the pump body base, the slide valve is inserted into the slide valve cavity, there is a slide valve limiting pin with a slot on the outside of the slide valve cavity of the pump body base, and a slide valve limiting rod is installed at the end of the slide valve.

[0005] Spool valve: A spool valve consists of a large-diameter spool valve and a small-diameter spool valve, which together form a valve core retainer. The small-diameter spool valve has descending oil ring grooves, return oil ring grooves, rising oil ring grooves, and oil passage ring grooves. Inside the spool valve are a valve core cavity, a lateral oil passage, and a longitudinal oil passage. The valve core cavity is connected to the lateral oil passage. The inner diameter of the valve core cavity is larger than the inner diameter of the lateral oil passage. A sealing hole is located at the rear end of the spool valve, and an oil seal is placed within this hole and fixed to the spool valve by a fixing pin. The fixing pin is inserted into the pin hole and passes through the oil seal, sealing the rear end of the valve core cavity. A ball seal is located within the valve core cavity between the valve core cavity and the lateral oil passage. The ball seal spring has its top end resting on the ball seal and its bottom end resting on the oil seal. The valve core's transverse oil passage is connected to the valve core's longitudinal oil passage, and the valve core's longitudinal oil passage is connected to the oil passage annular groove. A valve core return spring is fitted on the small-diameter spool valve, with one end resting on the valve core retaining platform and the other end resting on the valve body retaining platform. The valve core cavity has a right branch oil passage and a left branch oil passage, which are connected to the rising oil annular groove and the descending oil annular groove, respectively. The tail end of the spool valve extending out of the spool valve cavity on the left side is the left limiting edge. There are left and right pin hole sealing rings on both sides of the pin hole outside the large-diameter spool valve. The return oil annular groove is connected to the small-diameter valve cavity.

[0006] The spool valve chamber consists of a large-diameter valve chamber and a small-diameter valve chamber, which together form a valve body retainer. The small-diameter valve chamber has a return oil channel that connects to the oil reservoir. A large-diameter inlet branch is located on the pump body base corresponding to the oil circuit annular groove. This large-diameter inlet branch connects to the small-diameter inlet branch, which contains a check valve. The small-diameter inlet branch connects to the oil reservoir via the inlet oil circuit. The inner wall of the small-diameter valve chamber has a descending oil ring groove-return oil ring groove sealing ring, a return oil ring groove-ascending oil ring groove adjustable sealing ring, and a spool valve front end sealing ring. The descending port connector connects to the descending oil ring groove via the descending connecting oil circuit, and the ascending port connector connects to the return oil ring groove or ascending oil ring groove via the ascending connecting oil circuit.

[0007] This utility model modifies the existing straight valve core structure, which is simple in structure and convenient in operation and reversal, providing designers with another design idea for the design of manual pumps. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the overall external appearance of this utility model;

[0009] Figure 2 This is a utility model Figure 1 A cross-sectional view of the AA spool valve;

[0010] Figure 3 This is a utility model Figure 1 A cross-sectional view of the AABB valve cavity;

[0011] Figure 4 This is a schematic diagram of the structure of the slide valve of this utility model inserted into the slide valve cavity;

[0012] Figure 5 This is a schematic diagram of the slide valve limit pin locking platform in the descending state, where the slide valve limit rod is locked.

[0013] Figure 6 This is a diagram showing the oil circuit routing in the rising state of this utility model;

[0014] Figure 7 This is a diagram showing the oil path in the descending state of this utility model. Detailed Implementation

[0015] This utility model has a slide valve cavity inside the pump body base 1, and a slide valve 2 is inserted into the slide valve cavity. A slide valve limiting pin 5 with a slot is located on the outside of the slide valve cavity of the pump body base 1. A slide valve limiting rod 4 is installed at the end of the slide valve 2. The slot of the slide valve limiting pin 5 can accommodate the slide valve limiting rod 4. When the slide valve limiting rod 4 is placed in the slot, the rear end of the slide valve 2 extends out of the pump body base 1, which is the raised state. Figure 4 When the slide valve limit rod 4 disengages from the slot and rests on the surface of the slide valve limit pin 5, the rear end of the slide valve 2 hooks onto the side of the pump body base 1, and is in a lowered state. Figure 5 ).

[0016] Slide valve 2: See Figure 2 The spool valve 2 is composed of a large-diameter spool valve 214 and a small-diameter spool valve 204. The large-diameter spool valve 214 and the small-diameter spool valve 204 form a valve core retainer 215. The large-diameter spool valve 214 and the small-diameter spool valve 204 are integrally machined, differing only in their outer diameters. The small-diameter spool valve 204 has a descending oil ring groove 216, a return oil ring groove 217, a rising oil ring groove 218, and an oil passage ring groove 220. The descending oil ring groove 216, the return oil ring groove 217, the rising oil ring groove 218, and the oil passage ring groove 220 are all annular grooves that surround the outer diameter of the small-diameter spool valve 204. The spool valve 2 has a valve core cavity 221, a valve core transverse oil passage 202, and a valve core longitudinal oil passage 201 inside. The valve core cavity 221 is connected to the valve core transverse oil passage 202. The inner diameter of the valve core cavity 221 is larger than the inner diameter of the valve core transverse oil passage 202. A sealing hole 222 is opened at the rear end of the spool valve 2. An oil seal 210 is placed in the sealing hole 222 and fixed to the spool valve 2 (that is, fixedly installed at the large-diameter spool valve 214) by a fixing pin 212. The fixing pin 212 is inserted into the pin hole 213 and passes through the oil seal 210. The oil seal 210 seals the rear end of the valve core cavity 221. A ball seal 219 is located in the valve core cavity 221 between the valve core cavity 221 and the valve core transverse oil passage 202. The top end of the ball seal spring 205 rests on the ball seal 219, and the bottom end rests on the oil seal 210. The oil passage 202 is connected to the longitudinal oil passage 201 of the valve core, and the longitudinal oil passage 201 of the valve core is connected to the oil passage annular groove 220. A valve core return spring 207 is fitted on the small-diameter slide valve 204. One end of the valve core return spring 207 rests on the valve core retaining platform 215, and the other end rests on the valve body retaining platform 105. The valve core cavity 221 has a valve core right branch oil passage 203 and a valve core left branch oil passage 206, which are connected to the rising oil annular groove 218 and the falling oil annular groove 216, respectively. The tail end of the slide valve 2 extending out of the slide valve cavity on the left side is the left limiting edge 211. There are left pin hole sealing rings 209 and right pin hole sealing rings 208 on both sides of the pin hole 213 outside the large-diameter slide valve 214. The return oil annular groove 217 is connected to the small-diameter valve cavity 107.

[0017] The spool valve chamber consists of a large-diameter valve chamber 102 and a small-diameter valve chamber 107, which together form a valve body retainer 105. The small-diameter valve chamber 107 has a return oil passage 103 that communicates with the oil reservoir. A large-diameter inlet branch 108 is provided on the pump body base 1 corresponding to the oil circuit annular groove 220. The large-diameter inlet branch 108 communicates with the small-diameter inlet branch 111. A check valve 110 is located within the large-diameter inlet branch 108. The small-diameter branch 111 is connected to the oil storage tank through the oil inlet passage 112; there is a descending oil ring groove-returning oil ring groove sealing ring 104, an adjustable sealing ring 106 for the return oil ring groove-rising oil ring groove, and a front end sealing ring 109 for the slide valve on the inner wall of the small-diameter valve cavity 107; the descending port connector 6 is connected to the descending oil ring groove 216 through the descending connecting oil passage 101, and the rising port connector 3 is connected to the return oil ring groove 217 or the rising oil ring groove 218 through the rising connecting oil passage 113.

[0018] The components and features of a slide valve type manual pump are as follows:

[0019] Base: The base is a typical manual pump structure with an internal elongated through hole for mounting the slide valve core. The base has four through holes for connecting to the housing.

[0020] The slide valve limit pin 5 is provided with a limit boss (the part higher than the slot 7): the limit boss is a raised structure on the side of the base, and the middle of the raised structure is provided with a groove (slot 7).

[0021] Oil return port on the base (oil return channel 103): The oil return port on the base is a blind hole perpendicular to the surface of the base, which extends into the long through hole of the base and is used for oil return.

[0022] Limiting pin (fixed pin 212): The limiting pin is a general pin structure used to assemble with the spool valve core and limit the position of the spool valve core.

[0023] Housing: The housing is a typical manual pump housing, which stores hydraulic oil and has four threaded holes for connection to the base.

[0024] Sealing rings (left sealing ring 209 for pin hole, right sealing ring 208 for pin hole, sealing ring 104 for descending oil ring groove-return oil ring groove, adjustable sealing ring 106 for return oil ring groove-rising oil ring groove, and sealing ring 109 for front end of spool valve): The sealing rings are general O-rings used for sealing between the spool valve core and the base.

[0025] Limiting spring (valve core return spring 207): The limiting spring is a general spring structure and is used for the sliding action of the spool valve core.

[0026] 6. The lowering port connector is a general pipeline connector used to connect hydraulic oil to the upper chamber of the differential cylinder.

[0027] Rising port connector 3: The rising port connector is a general pipeline connector used to connect hydraulic oil to the lower chamber of the differential cylinder.

[0028] Slide valve core (slide valve 2): The slide valve core is similar in structure to the straight valve core on a general manual pump. The slide valve core has a larger outer diameter end face on the left side. The distance between the slide valve core and the base is the maximum stroke of the slide valve core, which is used to limit the slide valve core when the oil cylinder descends. The right end is provided with a thread for connecting to the handle ball.

[0029] Oil return groove (oil return ring groove 217): The oil return groove is an annular groove in the middle part of the slide valve core.

[0030] Rising oil groove (rising oil ring groove 218): The rising oil groove is an annular groove structure on the spool valve core. Near the rising port connector, the annular groove is provided with blind holes that penetrate into the spool valve core.

[0031] The descending oil groove (descending oil ring groove 216) is an annular groove structure on the spool valve core. Near the descending port connector, the annular groove has a blind hole that penetrates into the spool valve core.

[0032] Handle Ball: Figure 2 The ball at the far right is a spherical structure with a threaded hole in the middle, which is tightened by engaging with the threaded end of the spool valve core.

[0033] This manual pump is used in conjunction with a differential hydraulic cylinder. When the hydraulic cylinder is in the upward operation, oil needs to be pumped out from both the upward and downward ports of the manual pump; when the hydraulic cylinder is in the downward operation, oil needs to be pumped out from the downward port and returned from the upward port.

[0034] When performing upward operations, such as Figure 4 and Figure 6 As shown, hydraulic oil enters the spool valve core under the action of the manual pump, and simultaneously enters the rising oil groove and the falling oil groove through the blind hole on the straight valve core. The rising and falling oil grooves are connected to the rising port connector and the falling port connector, respectively. The hydraulic oil simultaneously enters the upper and lower chambers of the differential cylinder, realizing the rising operation of the cylinder. At this time, the positioning pin is located in the middle groove of the limiting boss. The sealing ring (left sealing ring 209 of the pin hole and right sealing ring 208 of the pin hole) realizes the sealing between the base and the spool valve core. The function of the sealing ring (falling oil ring groove-return oil ring groove sealing ring 104) is to prevent the hydraulic oil in the rising and falling ports from being connected in series, and at the same time prevent the hydraulic oil from returning to the housing.

[0035] During descent operations, such as Figure 7As shown, the operator drags the handle ball to the right, and the limit pin moves to the right along with the spool valve core. At the same time, the handle ball is rotated to a certain angle and the handle ball is released. The left end face of the spool valve core is stuck after it is attached to the base and cannot move to the right anymore. At this time, the positioning pin is stuck on the limit boss under the action of the limit spring. The sealing rings (left sealing ring 209 for the pin hole and right sealing ring 208 for the pin hole) seal between the base and the spool valve core. The sealing ring on the left side (lowering oil ring groove - returning oil ring groove sealing ring 104) still separates the rising and lowering oil ports. At this time, the rising oil port is blocked by the through hole of the base, but the lowering oil port can still enter oil. The hydraulic oil enters the upper chamber of the cylinder, and the hydraulic oil in the lower chamber returns through the rising port connector. The hydraulic oil enters the returning oil groove and is discharged into the housing through the returning oil port on the base.

Claims

1. A slide valve type manual pump, characterized in that: A slide valve cavity is opened in the pump body base (1), and a slide valve (2) is inserted in the slide valve cavity. There is a slide valve limiting pin (5) with a slot on the outside of the slide valve cavity of the pump body base (1), and a slide valve limiting rod (4) is installed at the end of the slide valve (2). Spool valve (2): Spool valve (2) is composed of a large-diameter spool valve (214) and a small-diameter spool valve (204). The large-diameter spool valve (214) and the small-diameter spool valve (204) form a valve core retainer (215). The small-diameter spool valve (204) has a descending oil ring groove (216), a return oil ring groove (217), a rising oil ring groove (218), and an oil passage ring groove (220). The spool valve (2) has a valve core cavity (221), a valve core transverse oil passage (202), and a valve core longitudinal oil passage (201) inside. The valve core cavity (221) and the valve core are connected. The transverse oil passage (202) of the valve core is connected. The inner diameter of the valve core cavity (221) is larger than the inner diameter of the transverse oil passage (202). A sealing hole (222) is opened at the rear end of the slide valve (2). The oil seal (210) is placed in the sealing hole (222) and fixed to the slide valve (2) by a fixing pin (212). The fixing pin (212) is inserted into the pin hole (213) and passes through the oil seal (210). The oil seal (210) seals the rear end of the valve core cavity (221). The valve core between the valve core cavity (221) and the transverse oil passage (202) is connected. The cavity (221) contains a ball seal (219), the top of the ball seal spring (205) rests on the ball seal (219), and the bottom rests on the oil seal (210). The transverse oil passage (202) of the valve core is connected to the longitudinal oil passage (201) of the valve core, and the longitudinal oil passage (201) of the valve core is connected to the oil passage annular groove (220). A valve core return spring (207) is fitted on the small-diameter slide valve (204). One end of the valve core return spring (207) rests on the valve core retaining plate (215), and the other end rests on the valve body retaining plate (105). The valve core cavity ( 221) There is a right branch oil passage (203) and a left branch oil passage (206) of the valve core. The right branch oil passage (203) and the left branch oil passage (206) of the valve core are connected to the rising oil ring groove (218) and the falling oil ring groove (216) respectively. The tail end of the slide valve (2) extending out of the slide valve cavity on the left side is the left limiting edge (211). There are left pin hole sealing ring (209) and right pin hole sealing ring (208) on both sides of the pin hole (213) outside the large diameter slide valve (214). The return oil ring groove (217) is connected to the small diameter valve cavity (107). Slide valve chamber: The slide valve chamber is composed of a large-diameter valve chamber (102) and a small-diameter valve chamber (107). The large-diameter valve chamber (102) and the small-diameter valve chamber (107) form a valve body retainer (105). The small-diameter valve chamber (107) has a return oil passage (103) that communicates with the oil reservoir. The pump body base (1) corresponding to the oil circuit annular groove (220) has an oil inlet large-diameter branch (108). The oil inlet large-diameter branch (108) is connected to the oil inlet small-diameter branch (111). There is a check ball valve (110) in the oil inlet large-diameter branch (108). The small-diameter inlet branch (111) is connected to the oil storage tank through the inlet oil passage (112); there is a descending oil ring groove-return oil ring groove sealing ring (104), a return oil ring groove-rising oil ring groove adjustable sealing ring (106) and a slide valve front end sealing ring (109) on the inner wall of the small-diameter valve cavity (107); the descending port connector (6) is connected to the descending oil ring groove (216) through the descending connecting oil passage (101), and the rising port connector (3) is connected to the return oil ring groove (217) or the rising oil ring groove (218) through the rising connecting oil passage (113).

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