CN210829657U

CN210829657U - Resetting device of high-pressure oil ejector

Info

Publication number: CN210829657U
Application number: CN201921971790.2U
Authority: CN
Inventors: 潘灵钢; 邵先月; 林妙妙; 谭加第
Original assignee: ZHEJIANG REFINE WUFU AIR TOOLS CO Ltd
Current assignee: ZHEJIANG REFINE WUFU AIR TOOLS CO Ltd
Priority date: 2019-11-14
Filing date: 2019-11-14
Publication date: 2020-06-23
Anticipated expiration: 2029-11-14

Abstract

The utility model belongs to the technical field of high-pressure oiling equipment, refer in particular to a resetting means of high-pressure grease squirt, be equipped with exhaust copper valve's cylinder body, cylinder upper cover and cylinder block including the inner chamber, sliding connection has the switching-over case in the inner chamber of cylinder body, and the slip suit of wherein one end of switching-over case is located be provided with resetting means on the terminal surface of the cylinder block of cylinder body inner chamber or/and the terminal surface of cylinder upper cover, resetting means is including the gliding push rod that resets from top to bottom of inner chamber axial that can follow the cylinder body, and the interior terminal surface that inwards promotes the push rod that resets and drive the push rod that resets is inconsistent with the terminal surface that corresponds of switching-over case, and then drives the relative exhaust copper valve of switching-over. The utility model has the advantages of being simple in structure and convenient in operation, need not to dismantle the air pump, just enable the switching-over case and break away from the exhaust hole of exhaust copper valve fast to resume the normal operating of air pump.

Description

Resetting device of high-pressure oil ejector

The technical field is as follows:

the utility model belongs to the technical field of high-pressure oiling equipment, refer in particular to a resetting means of high-pressure grease squirt.

Background art:

the high-pressure oil ejector is oil injection equipment taking compressed air as power, oil is enabled to generate high pressure under the action of a pump, and oil injection is carried out by utilizing the high pressure. The oil injection device is indispensable for mechanization of the oil injection process.

The oil injector is formed by combining an air pump and a plunger oil pump. The air pump is a power pump for driving the plunger oil pump, and compressed air drives the air pump to reciprocate, so that the plunger oil pump is driven to reciprocate to achieve oil inlet and oil outlet and generate oil pressure.

The air pump comprises a cylinder upper cover 1, a piston assembly, a cylinder 2, a cylinder seat 3, a reversing valve core 4, an exhaust copper valve 5 and the like. Two groups of small holes are arranged in the cylinder 2, and the two groups of small holes are equivalent to the principle of a communicating vessel. In the process of inflating and deflating the machine, the two ends of the reversing valve core 4 form air pressure difference, the reversing valve core 4 reciprocates under the pushing of the air pressure difference, and the two ends of the piston assembly also reciprocate under the pushing action of the air pressure difference by depending on the principle of the communicating vessel and the air pressure difference.

When the air pump works, the reversing valve core 4 reciprocates under the action of air pressure, and after the air pump runs for a long period of time, as shown in fig. 1, the small end (the part sleeved with the O-shaped ring) of the reversing valve core 4 is clamped in an exhaust hole of the exhaust copper valve 5, so that the air pump does not work, air leakage is caused, the oil injector cannot be filled with oil, at the moment, an operator can only disassemble the air pump, and the reversing valve core 4 can be separated from the exhaust hole of the exhaust copper valve 5, so that the air pump is inconvenient to operate, wastes time and energy and influences the working efficiency of the air.

The invention content is as follows:

the utility model discloses to prior art's not enough, provide one kind and need not to dismantle the air pump, enable the switching-over case and break away from the high-pressure grease squirt's in exhaust copper valve exhaust hole resetting means fast.

The utility model discloses a realize like this:

a resetting device of a high-pressure oil ejector comprises a cylinder body, an upper cylinder cover and a cylinder seat, wherein an exhaust copper valve is arranged in an inner cavity of the cylinder body, the upper cylinder cover is covered on an upper end port of the cylinder body, the cylinder seat is covered on a lower end port of the cylinder body, a reversing valve core is connected in the inner cavity of the cylinder body in a sliding mode, one end of the reversing valve core is sleeved on the exhaust copper valve in a sliding mode, a resetting device is arranged on the end face of the cylinder seat or/and the end face of the upper cylinder cover, the resetting device comprises a resetting push rod capable of sliding up and down along the axial direction of the inner cavity of the cylinder body, and the resetting push rod is pushed inwards to drive an inner end face of the resetting push rod to be abutted against a.

In the resetting device of the high-pressure oil ejector, a step through hole is formed in the end surface of the cylinder seat positioned in the inner cavity of the cylinder body or/and the end surface of the upper cover of the cylinder body, the step through hole comprises a small diameter part and a large diameter part which are arranged from inside to outside, a step surface is formed between the small diameter part and the large diameter part, the resetting device comprises a resetting sleeve, the inner end of a resetting push rod is connected to the small diameter part in a sliding mode, the outer end of the resetting push rod is connected to the resetting sleeve in a sliding mode, the resetting sleeve is fixedly connected with the large diameter part, a first annular convex edge is arranged on the inner side wall of the resetting sleeve, a second annular convex edge is arranged on the outer side wall of the resetting push rod, the resetting push rod moves outwards to an extreme value, the outer end surface of the second annular convex edge is; the reset push rod moves inwards to an extreme value, and the inner end face of the second annular convex edge is abutted against the step face to limit the limit position of the inward movement of the reset push rod.

In the resetting device of the high-pressure oil ejector, the resetting push rod is sleeved with the O-shaped ring, and the O-shaped ring is positioned between the resetting push rod and the small-diameter part and seals a gap between the resetting push rod and the small-diameter part.

In the resetting device of the high-pressure oil ejector, the step surface positioned at the edge of the small diameter part is recessed inwards to form a first limiting groove, the resetting push rod positioned between the inner end surface of the resetting sleeve and the step surface is sleeved with a check ring, a limiting space is formed between the check ring and the first limiting groove, and the O-shaped ring is arranged in the limiting space; the reset push rod moves inwards to an extreme value, the inner end face of the second annular convex edge is abutted against the outer end face of the retainer ring, and the limit position of the reset push rod moving inwards is limited.

In the resetting device of the high-pressure oil ejector, the edge of the inner port of the resetting sleeve is outwards concave to form a second limiting groove, and the check ring is arranged in the second limiting groove.

In the resetting device of the high-pressure oil ejector, the diameter of the resetting push rod positioned on the outer side of the second annular convex edge is larger than that of the resetting push rod positioned on the inner side of the second annular convex edge. The reset push rod positioned on the inner side of the second annular convex edge has small diameter, which is helpful for sealing; the reset push rod positioned on the outer side of the second annular convex edge is large in diameter, so that the stress area is increased, and the reset push rod is convenient to push and pull.

In the resetting device of the high-pressure oil ejector, the inner end of the resetting sleeve is fixedly connected with the large-diameter part through threads; or the inner end of the reset sleeve is fixedly connected with the large-diameter part through welding; or the inner end of the reset sleeve is embedded and fixed in the large-diameter part.

Compared with the prior art, the utility model outstanding advantage is:

the utility model drives the reversing valve core to slide upwards or downwards relative to the exhaust copper valve by pressing the reset push rod, namely the reversing valve core is separated from the exhaust hole of the exhaust copper valve, thereby recovering the normal operation of the air pump; compared with the prior art, the air pump is simple in structure and convenient to operate, and the air pump does not need to be detached.

Description of the drawings:

FIG. 1 is a cross-sectional view of a prior art structure;

FIG. 2 is a structural sectional view of the present invention;

FIG. 3 is an enlarged view at A of FIG. 2;

FIG. 4 is a structural cross-sectional view of a cylinder block;

fig. 5 is a structural cross-sectional view of the reset sleeve.

Reference numerals:

in fig. 1: 1. an upper cover of the cylinder; 2. a cylinder; 3. a cylinder block; 4. a reversing valve core; 5. an exhaust copper valve;

in FIGS. 2-5: 111. an upper cover of the cylinder; 112. a cylinder body; 113. a cylinder block; 114. a stepped through hole; 1141. a small diameter part; 1142. a large diameter portion; 1143. a first limit groove; 12. an exhaust copper valve; 13. a reversing valve core; 14. resetting the push rod; 141. a second annular ledge; 15. a reset sleeve; 151. a first annular ledge; 152. a second limit groove; 16. an O-shaped ring; 17. and a retainer ring.

The specific implementation mode is as follows:

the invention will now be further described with reference to specific embodiments, with reference to figures 2 to 5:

a resetting device of a high-pressure oil ejector comprises a cylinder body 112, an upper cylinder cover 111 and a cylinder seat 113, wherein an exhaust copper valve 12 is installed in an inner cavity of the cylinder body 112, the upper cylinder cover 111 covers an upper port of the cylinder body 112, and a lower port of the cylinder body 112 is covered by the cylinder seat 113, a reversing valve core 13 is connected in the inner cavity of the cylinder body 112 in a sliding mode, one end of the reversing valve core 13 is sleeved on the exhaust copper valve 12 in a sliding mode, a resetting device is arranged on the end face of the cylinder seat 113 located in the inner cavity of the cylinder body 112 or/and the end face of the upper cylinder cover 111, the resetting device comprises a resetting push rod 14 capable of sliding up and down along the axial direction of the inner cavity of the cylinder body 112, and the resetting push rod 14 is pushed inwards to drive the inner end face of the resetting push.

In the present embodiment, the returning means is provided only on the upper end surface of the cylinder block 113 located in the inner cavity of the cylinder block 112.

The utility model discloses a theory of operation:

when one end of the reversing valve core 13 is clamped in the exhaust hole of the exhaust copper valve 12, the reset push rod 14 is pushed inwards, so that the reversing valve core 13 is driven to slide relative to the exhaust copper valve 12, the reversing valve core 13 is separated from the exhaust hole of the exhaust copper valve 12, and the normal operation of the air pump is recovered.

The reset device may be a driving cylinder, the reset push rod 14 is a telescopic rod of the driving cylinder, that is, the driving cylinder is fixed on the end surface of the cylinder seat 113 located in the inner cavity of the cylinder body 112 or/and the end surface of the cylinder upper cover 111, and the telescopic rod of the driving cylinder slides up and down along the axial direction of the inner cavity of the cylinder body 112.

In order to facilitate the assembly of the reset push rod 14, and meanwhile, in order to save cost and reduce the number of parts, the reset device adopts the following specific structure: the upper end face of the cylinder seat 113 located in the inner cavity of the cylinder body 112 or/and the lower end face of the cylinder upper cover 111 is provided with a step through hole 114, the step through hole 114 comprises a small-diameter portion 1141 and a large-diameter portion 1142 which are arranged from inside to outside, a step face is formed between the small-diameter portion 1141 and the large-diameter portion 1142, the resetting device comprises a resetting sleeve 15, the inner end of the resetting push rod 14 is slidably connected to the small-diameter portion 1141, the outer end of the resetting push rod is slidably connected to the resetting sleeve 15, the resetting sleeve 15 is fixedly connected with the large-diameter portion 1142, a first annular convex edge 151 is arranged on the inner side wall of the resetting sleeve 15, and a second annular convex edge. Therefore, the reset push rod 14 moves outwards to the extreme value, the outer end surface of the second annular flange 141 is in contact with the inner end surface of the first annular flange 151, and the extreme position of the outward movement of the reset push rod 14 is defined; the reset push rod 14 moves inwards to the extreme value, and the inner end surface of the second annular convex edge 141 is in contact with the step surface, so that the limit position of the inward movement of the reset push rod 14 is limited.

Correspondingly, in the present embodiment, the stepped through hole 114 is provided on the upper end surface of the cylinder block 113 located in the inner cavity of the cylinder block 112.

In order to avoid the gas in the cavity of the cylinder 112 from leaking out from the gap between the reset push rod 14 and the small diameter portion 1141 and improve the air tightness between the reset push rod 14 and the small diameter portion 1141, an O-ring 16 is sleeved on the reset push rod 14, and the O-ring 16 is located between the reset push rod 14 and the small diameter portion 1141.

The O-ring 16 may be mounted in the following manner: an annular mounting groove is formed in the reset push rod 14 or the small diameter portion 1141, and the O-shaped ring 16 is sleeved in the annular mounting groove.

In the present embodiment, the O-ring 16 is mounted in another way: a step surface positioned at the edge of the small diameter part 1141 is recessed inwards to form a first limiting groove 1143, a retaining ring 17 is sleeved on the reset push rod 14 positioned between the inner end surface of the reset sleeve 15 and the step surface, a limiting space is formed between the retaining ring 17 and the first limiting groove 1143, and the O-shaped ring 16 is arranged in the limiting space;

correspondingly, at this time, the reset push rod 14 moves inwards to the extreme value, and the inner end surface of the second annular flange 141 is in contact with the outer end surface of the retainer ring 17, that is, the limit position of the inward movement of the reset push rod 14 is defined by the retainer ring 17.

Meanwhile, in order to facilitate the installation stability of the retainer ring 17, the inner port edge of the reset sleeve 15 is recessed outward to form a second limiting groove 152, and the retainer ring 17 is disposed in the second limiting groove 152.

Preferably, the diameter of the reset push rod 14 located outside the second annular ledge 141 is larger than the diameter of the reset push rod 14 located inside the second annular ledge 141. The reset push rod 14 inside the second annular ledge 141 has a small diameter to aid in sealing; the reset push rod 14 positioned outside the second annular convex edge 141 has a large diameter, so that the stress area is increased, and the reset push rod 14 is convenient to push and pull.

In addition, the fixed connection of the reset sleeve 15 and the large diameter portion 1142: the inner end of the reset sleeve 15 is fixedly connected with the large-diameter part 1142 through threads; or the inner end of the reset sleeve 15 is fixedly connected with the large-diameter part 1142 through welding; or the inner end of the reset sleeve 15 is embedded and fixed in the large-diameter portion 1142.

The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so: all equivalent changes made according to the shape, structure and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a resetting means of high pressure grease squirt, is equipped with cylinder body (112) of exhaust copper valve (12) including the inner chamber, covers cylinder upper cover (111) of establishing port on cylinder body (112) and covers cylinder block (113) of establishing port under cylinder body (112), sliding connection has switching-over case (13) in the inner chamber of cylinder body (112), and the suit of wherein one end of switching-over case (13) slides on exhaust copper valve (12), its characterized in that: and a reset device is arranged on the end surface of a cylinder seat (113) positioned in the inner cavity of the cylinder body (112) or/and the end surface of the cylinder upper cover (111), and comprises a reset push rod (14) capable of axially sliding up and down along the inner cavity of the cylinder body (112), and the reset push rod (14) is pushed inwards to drive the inner end surface of the reset push rod (14) to be abutted against the corresponding end surface of the reversing valve core (13) so as to drive the reversing valve core (13) to slide upwards or downwards relative to the exhaust copper valve (12).

2. The high pressure lubricator reset device of claim 1, wherein: a step through hole (114) is arranged on the end surface of the cylinder seat (113) positioned in the inner cavity of the cylinder body (112) or/and the end surface of the cylinder upper cover (111), the step through hole (114) comprises a small diameter part (1141) and a large diameter part (1142) which are arranged from inside to outside, a step surface is formed between the small diameter part (1141) and the large diameter part (1142), the resetting device comprises a resetting sleeve (15), the inner end of the resetting push rod (14) is connected to the small-diameter part (1141) in a sliding mode, the outer end of the resetting push rod is connected to the resetting sleeve (15) in a sliding mode, the resetting sleeve (15) is fixedly connected with the large-diameter part (1142), a first annular convex edge (151) is arranged on the inner side wall of the resetting sleeve (15), a second annular convex edge (141) is arranged on the outer side wall of the resetting push rod (14), the resetting push rod (14) moves outwards to an extreme value, and the outer end face of the second annular convex edge (141) is abutted to the inner end face of the first annular convex edge (151); the reset push rod (14) moves inwards to an extreme value, and the inner end surface of the second annular convex edge (141) is abutted against the step surface.

3. The high pressure lubricator reset device according to claim 2, wherein: the reset push rod (14) is sleeved with an O-shaped ring (16), and the O-shaped ring (16) is located between the reset push rod (14) and the small-diameter portion (1141).

4. The high pressure lubricator reset device of claim 3, wherein: a step surface positioned at the edge of the small diameter part (1141) is recessed inwards to form a first limiting groove (1143), a reset push rod (14) positioned between the inner end surface of the reset sleeve (15) and the step surface is sleeved with a check ring (17), a limiting space is formed between the check ring (17) and the first limiting groove (1143), and the O-shaped ring (16) is arranged in the limiting space; the reset push rod (14) moves inwards to an extreme value, and the inner end surface of the second annular convex edge (141) is abutted to the outer end surface of the retainer ring (17).

5. The high-pressure lubricator resetting device according to claim 4, wherein: the inner port edge of the reset sleeve (15) is outwards concave to form a second limiting groove (152), and the retainer ring (17) is arranged in the second limiting groove (152).

6. The high pressure lubricator reset device according to claim 2, wherein: the diameter of the reset push rod (14) positioned on the outer side of the second annular flange (141) is larger than that of the reset push rod (14) positioned on the inner side of the second annular flange (141).

7. The high pressure lubricator reset device according to claim 2, wherein: the inner end of the reset sleeve (15) is fixedly connected with the large-diameter part (1142) through threads; or the inner end of the reset sleeve (15) is fixedly connected with the large-diameter part (1142) through welding; or the inner end of the reset sleeve (15) is embedded and fixed in the large-diameter part (1142).