CN219775112U - Oil circuit switching handle for rescue equipment - Google Patents

Abstract

The oil way switching handle for the rescue equipment comprises a pipeline joint, an oil way seat in the upper end of the pipeline joint and a tool joint arranged on the oil way seat, wherein the center of the upper surface of the oil way seat is provided with a mounting hole, a butt joint oil feeding structure matched with the mounting hole is arranged in the mounting hole, and the middle part of the oil way seat is provided with a fixing hole which transversely penetrates through the oil way seat; the inner wall of the hole at the left end of the fixed hole is provided with a left annular groove; the inner wall of the hole at the right end of the fixed hole is provided with a right annular groove; fixing columns matched with the fixing holes are arranged in the fixing holes; the center of the fixed column is provided with a switching hole which axially penetrates through the fixed column. The oil way switching handle for the rescue equipment can switch the oil way, so that the oil way originally used for oil return can be used for oil inlet, and therefore, the oil way for oil inlet and the oil way for oil outlet can be both used for oil inlet, the bidirectional oil inlet effect is realized, the bidirectional oil inlet is ensured to have high pressure, and the rescue equipment is convenient to develop.

Description

Oil circuit switching handle for rescue equipment

Technical Field

The utility model relates to a handle for rescue equipment, in particular to an oil way switching handle for rescue equipment.

Background

The rescue equipment refers to a hydraulic tool capable of rapidly carrying out rescue, the hydraulic tool is in transitional connection with an oil delivery pipeline through a handle, one end of the handle is connected with an oil inlet joint of the hydraulic tool, the other end of the handle is connected with the end part of the oil delivery pipeline, accordingly, hydraulic oil in the oil delivery pipeline is conveyed into the hydraulic tool through the handle, the hydraulic tool is finally driven to work, the inside of the traditional handle only has a single oil inlet oil way and an oil return oil way, the track of oil inlet and oil return is fixed, the oil inlet oil way can only be used for oil inlet, the oil return oil way can only be used for oil return, the normal oil inlet and oil return have the characteristics of self, the extremely high pressure can be generated during oil inlet, the pressure generated during oil return is small, the unidirectional oil inlet mode can lead to high pressure when the hydraulic tool applies pressure, the hydraulic tool can be utilized to destroy objects, rescue is implemented, some hydraulic tools need to ensure that the high pressure oil return is ensured after the hydraulic pliers are stressed, for example, the hydraulic pliers can be closed through the high pressure when the oil inlet is used for cutting objects, the small pressure generated during oil return is difficult to restore the cutting pliers, and the cutting pliers are difficult to cut and reset to the cutting pliers are affected on the normal position of the work.

Disclosure of Invention

The utility model aims to solve the technical problem of providing an oil way switching handle for rescue equipment, which can switch oil ways to enable the oil ways originally used for oil return to be used for oil inlet, so that the oil ways for oil inlet and the oil ways for oil outlet can be both used for oil inlet, the effect of bidirectional oil inlet is realized, high pressure is ensured in both directions, and the rescue equipment is convenient to develop.

The technical scheme adopted for solving the technical problems is as follows:

the utility model discloses an oil way switching handle for rescue equipment, which comprises a pipeline joint, an oil way seat screwed in the upper end of the pipeline joint and a tool joint arranged on the oil way seat, wherein the center of the upper surface of the oil way seat is provided with a mounting hole, and a butt joint oil feeding structure matched with the mounting hole is arranged in the mounting hole, and is characterized in that: the middle part of the oil way seat is provided with a fixing hole which transversely penetrates through the oil way seat; the inner wall of the hole at the left end of the fixed hole is provided with a left annular groove; the inner wall of the hole at the right end of the fixed hole is provided with a right annular groove; fixing columns matched with the fixing holes are arranged in the fixing holes; the center of the fixed column is provided with a switching hole which axially penetrates through the fixed column; a switching rod matched with the switching hole is arranged in the switching hole; the left end of the switching rod penetrates out of the switching hole leftwards and is provided with a left pressing structure matched with the left groove; the right end of the switching rod penetrates out of the switching hole to the right and is provided with a right pressing structure; the lower surface of the oil way seat is provided with a first oil hole and a second oil hole; the inner wall of the middle part of the fixed hole is provided with a first oil way communicated with the first oil hole; second oil ways communicated with the second oil holes are arranged on the inner walls of the left side and the right side of the fixed hole; the upper surface of the fixed hole is provided with a third oil way and a fourth oil way which are communicated with the butt joint oil feeding structure; the fixed column is provided with an oil passing structure matched with the third oil way and the fourth oil way; and the switching rod is provided with an oil circuit switching structure matched with the oil passing structure.

The oil way switching structure comprises a first annular groove, a second annular groove, a third annular groove and a fourth annular groove which are sequentially arranged on the outer wall of the switching rod from left to right; the upper part of the third annular groove is communicated with the lower part of the fourth annular groove through a first inclined hole; the lower part of the third annular groove is communicated with the upper part of the fourth annular groove through a second inclined hole; the first inclined hole and the second inclined hole are crossed and communicated; the front part of the first annular groove is communicated with the rear part of the second annular groove through a third inclined hole; the rear part of the first annular groove is communicated with the front part of the second annular groove through a fourth inclined hole; the third inclined hole and the fourth inclined hole are crossed and communicated.

The oil passing structure comprises a plurality of first oil passing grooves, second oil passing grooves, third oil passing grooves, fourth oil passing grooves and fifth oil passing grooves which are arranged on the outer wall of the fixed column from left to right, wherein the first oil passing grooves, the second oil passing grooves, the third oil passing grooves, the fourth oil passing grooves and the fifth oil passing grooves are all annular; the bottom of the first oil passing groove is provided with a plurality of first oil passing holes communicated with the switching holes; the bottom of the second oil passing groove is provided with a plurality of second oil passing holes communicated with the switching holes; the bottom of the third oil-passing groove is provided with a plurality of third oil-passing holes and third auxiliary holes communicated with the switching holes, and the third auxiliary holes are positioned at the left side of the third oil-passing holes; the bottom of the fourth oil groove is provided with a plurality of fourth oil holes communicated with the switching holes; the bottom of the fifth oil groove is provided with a plurality of fifth oil holes communicated with the switching holes; the first oil way is communicated with the third oil way; the first oil passing groove is communicated with the left second oil way, and the fifth oil passing groove is communicated with the right second oil way; the switching rod shields and seals the inner end orifice of the second oil through the outer wall of the switching rod; the third oil way is communicated with the second oil through groove, and the fourth oil way is communicated with the second oil through groove.

The oil conveying structure comprises a fixed seat which is screwed in the mounting hole; a pair of seats are arranged in the center of the upper surface of the fixed seat; the fourth oil upper end port is positioned at the center of the bottom of the mounting hole, and the third oil upper end port is positioned at the right side of the bottom of the mounting hole; the inner wall of the port at the upper end of the fourth oil circuit is provided with a lower positioning step which is annular; a lower oil feeding hole is formed in the center of the lower surface of the fixed seat; an upper oil feeding hole is formed in the center of the upper surface of the butt joint seat, and the diameter of the upper oil feeding hole is smaller than that of the lower oil feeding hole; an annular upper positioning step is arranged on the inner wall of the hole at the lower end of the lower oil feeding hole; an oil needle coaxial with the port at the upper end of the first oil path is arranged in the lower oil feeding hole, and the lower end of the oil needle is propped against the lower positioning step; the outer wall of the lower end of the oil needle is provided with a positioning part matched with the upper positioning step; an oil feeding gap is formed between the lower surface of the positioning part and the bottom of the mounting hole; the upper surface of the positioning part is provided with a plurality of oil delivery holes communicated with the oil delivery gap; the upper end of the oil needle upwards passes through the upper oil feeding hole; the upper part of the oil needle is sleeved with a sliding sleeve matched with the upper oil feeding hole; the inner wall of the upper oil feeding hole is provided with an annular limiting step; the outer wall of the sliding sleeve is provided with an annular limiting part, and the upper surface of the limiting part is attached to the limiting step; a pressure spring sleeved outside the oil needle is arranged between the lower end surface of the sliding sleeve and the upper surface of the positioning part; the center of the lower surface of the oil needle is provided with a center hole; the outer wall of the upper part of the oil needle is provided with a plurality of upper perforations and lower perforations communicated with the central hole, and the lower perforations are positioned right below the upper perforations; the upper perforated outer end orifice is sealed by the inner wall of the sliding sleeve in a shielding way, and the lower perforated outer end orifice is not sealed by the inner wall of the sliding sleeve in a shielding way.

The outer wall of the middle part of the oil needle is provided with an annular clamping step.

The left pressing structure comprises a left connecting hole arranged in the center of the left end face of the switching rod; a left button matched with the left groove is arranged in the left groove; the center of the side wall at the right side of the left button is provided with a left embedded hole matched with the left end of the switching rod; the center of the left side wall of the left button is provided with a left pressing groove coaxial with the left embedded hole; the left pressing groove is communicated with the left embedded hole through a left through hole; a left screw passes through the left through hole rightwards and is screwed into the left connecting hole, and the head of the left screw is pressed at the bottom of the left pressing groove; the bottom of the left groove is provided with a plurality of left spring grooves which are uniformly distributed in circumference; the notch at the left end of the left spring groove is in threaded connection with a left limiting ring; a left reset pin matched with the left spring groove is arranged in the left spring groove; the outer wall of the left reset pin is provided with a left annular bulge which is attached to the right side wall of the left limiting ring; a left reset spring sleeved outside the lower end of the left reset pin is arranged between the right side wall of the left annular bulge and the bottom of the left spring groove; the left end of the left reset pin penetrates through the inner hole of the left limiting ring leftwards and is propped against the right side wall of the left button.

The right pressing structure comprises a right connecting hole arranged in the center of the right end face of the switching rod; a right button matched with the right groove is arranged in the right groove; the center of the left side wall of the right button is provided with a right embedded hole matched with the right end of the switching rod; a right pressing groove coaxial with the right embedding hole is formed in the center of the right side wall of the right button; the right pressing groove is communicated with the right embedding hole through a right through hole; a right screw passes through the right through hole leftwards and is screwed into the right connecting hole, and the head of the right screw is pressed at the bottom of the right pressing groove; the bottom of the right pressing groove is provided with a plurality of right spring grooves which are uniformly distributed in the circumference; the notch at the right end of the right spring groove is in threaded connection with a right limiting ring matched with the notch at the right end of the right spring groove; a right reset pin matched with the right spring groove is arranged in the right spring groove; the outer wall of the right reset pin is provided with a right annular bulge which is attached to the left side wall of the right limiting ring; a right reset spring sleeved outside the left end of the right reset pin is arranged between the left side wall of the right annular bulge and the bottom of the right spring groove; the right end of the right reset pin rightwards passes through the inner hole of the right limiting ring and is propped against the left side wall of the right button.

The beneficial effects of the utility model are as follows:

compared with the prior art, the oil way switching handle for the rescue equipment with the structure can realize the left-right movement of the switching rod by pressing the right button and the left button, and finally change the flow track of hydraulic oil in the oil way seat, so that the oil way for oil inlet is converted into the oil way for oil return, and the oil way for oil return is converted into the oil way for oil inlet, thereby realizing the bidirectional oil inlet effect, having high pressure in both directions and being convenient for the work and the reset of the rescue equipment.

Drawings

FIG. 1 is a sectional view of an oil passage switching handle for rescue equipment according to the present utility model in a normal state;

fig. 2 is an enlarged view of a portion a of fig. 1;

fig. 3 is a sectional view of the oil passage switching handle for rescue equipment according to the present utility model when the right button is pressed leftward;

fig. 4 is a sectional view of the left button of the oil passage switching handle for rescue equipment according to the present utility model when pressed rightward;

fig. 5 is a schematic view of the oil path switching handle for the rescue apparatus of the present utility model;

FIG. 6 is a schematic structural view of a fixing post;

FIG. 7 is a schematic view of the structure of an angle of the switch lever;

FIG. 8 is a schematic view of another angle configuration of the switch lever;

fig. 9 is a schematic view of the structure of the oil passage seat at a first angle;

fig. 10 is a schematic view of the structure of the oil passage seat at a second angle;

fig. 11 is a schematic structural view of a third angle of the oil passage seat.

Detailed Description

The utility model is described in further detail below with reference to the attached drawings and detailed description:

referring to fig. 1 to 11, the present utility model provides an oil path switching handle for rescue equipment, which comprises a pipeline joint 1, an oil path seat 2 screwed in the upper end of the pipeline joint 1, and a tool joint 3 arranged on the oil path seat 2, wherein a mounting hole 4 is arranged in the center of the upper surface of the oil path seat 2, a butt joint oil feeding structure matched with the mounting hole 4 is arranged in the mounting hole, and a fixing hole 5 transversely penetrating through the middle of the oil path seat 2 is arranged; the inner wall of the hole at the left end of the fixed hole 5 is provided with a left annular groove 6; the inner wall of the hole at the right end of the fixed hole 5 is provided with a right annular groove 7; fixing columns 8 matched with the fixing holes 5 are arranged in the fixing holes; the center of the fixed column 8 is provided with a switching hole 9 which axially penetrates through the fixed column; a switching rod 10 matched with the switching hole 9 is arranged in the switching hole; the left end of the switching rod 10 penetrates out of the switching hole 9 leftwards and is provided with a left pressing structure matched with the left groove 6; the right end of the switching rod 10 penetrates out of the switching hole 9 to the right and is provided with a right pressing structure; the lower surface of the oil way seat 2 is provided with a first oil hole 11 and a second oil hole 12; the inner wall of the middle part of the fixed hole 5 is provided with a first oil way 13 communicated with the first oil hole 11; second oil passages 14 communicated with the second oil holes 12 are arranged on the inner walls of the left side and the right side of the fixed hole 5; the upper surface of the fixed hole 5 is provided with a third oil way 15 and a fourth oil way 16 which are communicated with the butt joint oil feeding structure; the fixed column 8 is provided with an oil passing structure matched with the third oil way 15 and the fourth oil way 16; the switching rod 10 is provided with an oil path switching structure matched with the oil passing structure.

The oil circuit switching structure comprises a first annular groove 17, a second annular groove 18, a third annular groove 19 and a fourth annular groove 20 which are sequentially arranged on the outer wall of the switching rod 10 from left to right; the upper part of the third annular groove 19 is communicated with the lower part of the fourth annular groove 20 through a first inclined hole 21; the lower part of the third annular groove 19 is communicated with the upper part of the fourth annular groove 20 through a second inclined hole 22; the first inclined hole 21 and the second inclined hole 22 are crossed and communicated; the front part of the first annular groove 17 is communicated with the rear part of the second annular groove 18 through a third inclined hole 23; the rear part of the first annular groove 17 is communicated with the front part of the second annular groove 18 through a fourth inclined hole 24; the third inclined hole 23 and the fourth inclined hole 24 are crossed and communicated.

The oil passing structure comprises a plurality of first oil passing grooves 25, second oil passing grooves 26, third oil passing grooves 27, fourth oil passing grooves 28 and fifth oil passing grooves 29 which are arranged on the outer wall of the fixed column 8 from left to right, wherein the first oil passing grooves 25, the second oil passing grooves 26, the third oil passing grooves 27, the fourth oil passing grooves 28 and the fifth oil passing grooves 29 are all annular; the bottom of the first oil passing groove 25 is provided with a plurality of first oil passing holes 30 communicated with the switching holes 9; the bottom of the second oil passing groove 26 is provided with a plurality of second oil passing holes 31 communicated with the switching holes 9; the bottom of the third oil-passing groove 27 is provided with a plurality of third oil-passing holes 32 communicated with the switching hole 9 and a third auxiliary hole 33, and the third auxiliary hole 33 is positioned at the left side of the third oil-passing hole 32; the bottom of the fourth oil groove 28 is provided with a plurality of fourth oil holes 34 communicated with the switching holes 9; the bottom of the fifth oil groove 29 is provided with a plurality of fifth oil holes 35 communicated with the switching holes 9; the first oil path 13 is communicated with a third oil-way groove 27; the first oil passage 25 is communicated with the left second oil passage 14, and the fifth oil passage 29 is communicated with the right second oil passage 14; the switching rod 10 shields and seals the inner end orifice of the second oil through hole 31 and the inner end orifice of the fourth oil through hole 34 through the outer wall of the switching rod; the third oil passage 15 is communicated with the second oil drain groove 26, and the fourth oil passage 16 is communicated with the second oil drain groove 26.

The oil delivery structure comprises a fixed seat 36 which is screwed in the mounting hole 4; a pair of seats 37 are arranged in the center of the upper surface of the fixed seat 36; the port at the upper end of the fourth oil way 16 is positioned at the center of the bottom of the mounting hole 4, and the port at the upper end of the third oil way 15 is positioned at the right side of the bottom of the mounting hole 4; the inner wall of the port at the upper end of the fourth oil circuit 16 is provided with a lower positioning step 38 which is annular; a lower oil feeding hole 39 is formed in the center of the lower surface of the fixed seat 36; an upper oil feeding hole 40 is arranged in the center of the upper surface of the butt joint seat 37, and the diameter of the upper oil feeding hole 40 is smaller than that of the lower oil feeding hole 39; an annular upper positioning step 41 is arranged on the inner wall of the lower end hole of the lower oil feeding hole 39; an oil needle 42 coaxial with the port at the upper end of the first oil path 13 is arranged in the lower oil feed hole 39, and the lower end of the oil needle 42 is propped against the lower positioning step 38; the outer wall of the lower end of the oil needle 42 is provided with a positioning part 43 matched with the upper positioning step 41; an oil feeding gap 44 is arranged between the lower surface of the positioning part 43 and the bottom of the mounting hole 4; the upper surface of the positioning part 43 is provided with a plurality of oil delivery holes 45 communicated with the oil delivery gap 44; the upper end of the oil needle 42 passes through the upper oil feed hole 40 upwards; the upper part of the oil needle 42 is sleeved with a sliding sleeve 46 matched with the upper oil feeding hole 40; the inner wall of the upper oil feeding hole 40 is provided with an annular limiting step 47; the outer wall of the sliding sleeve 46 is provided with an annular limiting part 48, and the upper surface of the limiting part 48 is attached to the limiting step 47; a pressure spring 49 sleeved outside the oil needle 42 is arranged between the lower end surface of the sliding sleeve 46 and the upper surface of the positioning part 43; the center of the lower surface of the oil needle 42 is provided with a center hole 50; the outer wall of the upper part of the oil needle 42 is provided with a plurality of upper perforations 51 and lower perforations 52 communicated with the central hole 50, and the lower perforations 52 are positioned right below the upper perforations 51; the outer end opening of the upper through hole 51 is sealed by shielding by the inner wall of the sliding sleeve 46, and the outer end opening of the lower through hole 52 is not sealed by shielding by the inner wall of the sliding sleeve 46.

The outer wall of the middle part of the oil needle 42 is provided with an annular clamping step 53.

The left pressing structure comprises a left connecting hole 54 arranged in the center of the left end face of the switching rod 10; a left button 55 matched with the left groove 6 is arranged in the left groove; the center of the right side wall of the left button 55 is provided with a left embedded hole 56 matched with the left end of the switching rod 10; a left pressing groove 57 coaxial with the left embedding hole 56 is arranged in the center of the left side wall of the left button 55; the left pressing groove 57 is communicated with the left embedded hole 56 through a left through hole 58; a left screw 59 passes through the left through hole 58 rightward and is screwed into the left connecting hole 54, and the head of the left screw 59 is pressed on the bottom of the left pressing groove 57; the bottom of the left groove 6 is provided with a plurality of left spring grooves 60 which are uniformly distributed in the circumference; the notch at the left end of the left spring groove 60 is in threaded connection with a left limiting ring 61; a left reset pin 62 matched with the left spring groove 60 is arranged in the left spring groove; the outer wall of the left reset pin 62 is provided with a left annular bulge 63 which is attached to the right side wall of the left limiting ring 61; a left reset spring 64 sleeved outside the lower end of the left reset pin 62 is arranged between the right side wall of the left annular bulge 63 and the bottom of the left spring groove 60; the left end of the left reset pin 62 passes through the inner hole of the left limiting ring 61 leftwards and is propped against the right side wall of the left button 55.

The right pressing structure comprises a right connecting hole 65 arranged in the center of the right end face of the switching rod 10; a right button 66 matched with the right groove 7 is arranged in the right groove; a right embedded hole 67 matched with the right end of the switching rod 10 is arranged in the center of the left side wall of the right button 66; a right pressing groove 68 coaxial with the right embedding hole 67 is arranged in the center of the right side wall of the right button 66; the right pressing groove 68 is communicated with the right embedding hole 67 through a right through hole 69; a right screw 70 passes through the right through hole 69 leftwards and is screwed into the right connecting hole 65, and the head of the right screw 70 is pressed on the bottom of the right pressing groove 68; the bottom of the right pressing groove 68 is provided with a plurality of right spring grooves 71 which are uniformly distributed in the circumference; the right end slot of the right spring slot 71 is in threaded connection with a right limiting ring 72 matched with the right spring slot; a right reset pin 73 matched with the right spring groove 71 is arranged in the right spring groove; the outer wall of the right reset pin 73 is provided with a right annular bulge 74 which is attached to the left side wall of the right limiting ring 72; a right reset spring 75 sleeved outside the left end of the right reset pin 73 is arranged between the left side wall of the right annular bulge 74 and the bottom of the right spring groove 71; the right end of the right reset pin 73 passes through the inner hole of the right limiting ring 72 to the right and is propped against the left side wall of the right button 66.

The application method of the utility model is as follows:

the pipeline joint 1 is used for being connected with the end part of an oil delivery pipeline, the tool joint 3 is an oil inlet joint used for being connected with rescue equipment, the tool joint 3 is of a clamping structure commonly used by the existing handle, the tool joint 3 is equivalent to a female joint, the oil inlet joint of the rescue equipment is equivalent to a male joint, after the male joint is clamped into the tool joint 3, the sliding sleeve 46 is pressed down, at the moment, the sliding sleeve 46 automatically supports the male joint under the elastic action of the pressure spring 49, so that the condition that hydraulic oil in the oil needle 42 leaks outwards through the upper perforation 51 when the sliding sleeve 46 moves is avoided, and the sliding sleeve 46 can move downwards along the track of the oil needle 42 when the rescue equipment needs to be driven to work due to the common butt joint structure adopted by the existing rescue equipment.

When the pipeline joint 1 and the oil pipeline are connected, hydraulic oil in the oil pipeline enters the pipeline joint 1, enters oil through the first oil hole 11 and flows into the first oil way 13, then flows into the third oil through the upper end port of the first oil way 13, and at the moment, the third oil through hole 32 is communicated with the fifth oil through hole 35 through the first inclined hole 21 and the second inclined hole 22, so that part of hydraulic oil in the third oil through hole 27 flows into the fourth annular groove 20 through the first inclined hole 21 and the second inclined hole 22, hydraulic oil flowing into the fourth annular groove 20 flows into the fifth oil through hole 29 through the fifth oil through hole 35, and the other part of hydraulic oil in the third oil through hole 27 flows into the second annular groove 18 through the third auxiliary hole 33, the hydraulic oil in the second annular groove 18 flows into the first annular groove 17 through the third inclined hole 23 and the fourth inclined hole 24, then flows into the first oil through groove 25 through the first oil through hole 30, the first oil through groove 25 is communicated with the left second oil way 14, the fifth oil through groove 29 is communicated with the right second oil way 14, and finally the hydraulic oil in the first oil through groove 25 and the fifth oil through groove 29 returns to the pipeline joint 1 through the second oil way 14 to form a complete oil inlet and return track, at the moment, the position of the switching rod 10 is at the initial position, the oil is simply fed through the oil conveying pipeline, idle work is performed on the oil inlet and the oil return in the handle, and the rescue equipment does not work.

When the rescue equipment needs to be operated, the right button 66 can be pressed leftwards, at this time, the right button 66 pushes the switching rod 10 leftwards until the left side wall of the right button 66 is attached to the bottom of the right groove 7, the switching rod 10 stops leftwards moving, when the right button 66 leftwards moves, the right button 66 pushes the right reset pin 73 leftwards, when the right reset pin 73 leftwards moves, the right annular protrusion 74 compresses the right reset spring 75 leftwards, at this time, the elasticity generated by the right reset spring 75 is convenient for the subsequent reset of the right button 66, after the switching rod 10 stops leftwards moving, the third oil through hole 32 is communicated with the fourth oil through the first inclined hole 21 and the second inclined hole 22, at this time, the inner end hole of the fifth oil through hole 35 is shielded and sealed by the outer wall of the switching rod 10, when hydraulic oil enters the third oil through the first oil way 13 into the third oil through hole 27, the third annular groove 19 encloses the inner end opening of the third oil passing hole 32 and the inner end opening of the third auxiliary hole 33, hydraulic oil entering the third oil passing groove 27 can only flow into the fourth annular groove 20 through the first inclined hole 21 and the second inclined hole 22, then flow into the fourth oil passing groove 28 through the fourth oil passing hole 34, then flow into the third oil path 15 to complete oil feeding action, hydraulic oil entering the third oil path 15 sequentially flows into a gap between the inner wall of the lower oil feeding hole 39 and the outer wall of the oil needle 42 through the oil feeding gap 44 and the oil feeding hole 45, at this time, the sliding sleeve 46 moves downwards to shield and seal the outer end opening of the lower perforation 52, a gap exists between the outer wall of the sliding sleeve 46 and the inner wall of the upper oil feeding hole 40, and finally hydraulic oil enters into the hydraulic rescue equipment through the gap between the outer wall of the sliding sleeve 46 and the inner wall of the upper oil feeding hole 40 to drive the hydraulic rescue equipment to operate, so that rescue effects are realized.

When the rescue equipment is used and needs to be reset, hydraulic oil returns to the central hole 50 through the outer end hole of the upper perforation 51 and flows into the second oil through groove 26 through the fourth oil way 16, the second oil through groove 26 is communicated with the second annular groove 18 through the second oil through hole 31, hydraulic oil in the second oil through groove 26 flows into the second annular groove 18 through the second oil through hole 31, the second annular groove 18 is communicated with the first annular groove 17 through the third inclined hole 23 and the fourth inclined hole 24, hydraulic oil entering the second annular groove 18 flows into the first annular groove 17, the first annular groove 17 is communicated with the left second oil way 14, and then the hydraulic oil returns through the left second oil way 14.

When the oil return track is required to be switched to the oil inlet track, the left button 55 can be pressed rightwards, at this time, the left button 55 pushes the switching rod 10 rightwards until the right side wall of the left button 55 is attached to the bottom of the left groove 6, the switching rod 10 stops rightwards moving, when the left button 55 moves rightwards, the left button 55 pushes the left reset pin 62 rightwards, when the left reset pin 62 moves rightwards, the left annular bulge 63 compresses the left reset spring 64 rightwards, at this time, the left reset spring 64 generates elasticity for the subsequent reset of the left button 55, when the switching rod 10 stops rightwards moving, the lower end port of the fourth oil path 16 is communicated with the first annular groove 17 through the second oil through hole 31, the third oil through groove 27 is communicated with the second annular groove 18 through the third oil through hole 32, and the fourth inclined hole 24 between the first annular groove 17 and the second annular groove 18, when the hydraulic oil is fed through the first oil path 13, the hydraulic oil enters the second annular groove 18 through the third oil through hole 32 at the first time, then flows into the first annular groove 17 through the third inclined hole 23 and the fourth inclined hole 24, the fourth oil way 16 originally used for oil return is changed into an oil way, the hydraulic oil in the first annular groove 17 sequentially enters the fourth oil way 16 through the second oil through hole 31 and the second oil through groove 26, the sliding sleeve 46 moves upwards to reset under the operation of the rescue equipment and the elastic action of the pressure spring 49 along with the closing of the rescue equipment, at the moment, the upper perforation 51 is shielded and sealed again, the lower perforation 52 is in a circulation state, the hydraulic oil entering the central hole 50 through the fourth oil way 16 flows into a gap between the outer wall of the oil needle 42 and the inner wall of the lower oil feeding hole 39 through the lower perforation 52, then sequentially flows into the third oil way 15 through the oil feeding hole 45 and the oil feeding gap 44, at this moment, the third oil path 15 is communicated with the fourth oil path 28, the fourth oil path 28 is communicated with the third annular groove 19 through the fourth oil hole 34, the third annular groove 19 is communicated with the fourth annular groove 20 through the first inclined hole 21 and the second inclined hole 22, and the fourth annular groove 20 is communicated with the fifth oil path 29 through the fifth oil hole 35, so that the third oil path 15 is finally communicated with the fifth oil path 29, the hydraulic oil returning from the third oil path 15 enters the fifth oil path 29, the fifth oil path 29 is communicated with the upper end port of the right second oil path 14, and finally the hydraulic oil entering from the fourth oil path 16 returns from the second oil path 14.

As can be seen from the above, the present utility model can realize the left-right movement of the switching lever 10 by pressing the right button 66 and the left button 55, and finally change the flow track of the hydraulic oil in the oil path seat 2, so that the oil path for oil intake is converted into the oil path for oil return, and the oil path for oil return is converted into the oil path for oil intake, thereby realizing the bidirectional oil intake effect, having high pressure in both directions, and being convenient for the rescue equipment to work and reset.

The outer wall in the middle of the oil needle 42 is provided with an annular clamping step 53, the stroke of the sliding sleeve 46 moving downwards can be effectively limited by the clamping step 53, the condition that the closed pressure spring 49 surrounds the lower through hole 52 inside due to the fact that the pressure spring 49 is excessively compressed by the sliding sleeve 46, and therefore hydraulic oil of the lower through hole 52 cannot flow to the third oil way is avoided, and the stable flow of the hydraulic oil is ensured.

Claims (7)

1. The utility model provides an oil circuit switching handle that rescue equipment used, includes pipeline joint, spiro union oil circuit seat in pipeline joint upper end and locates the instrument joint on the oil circuit seat, and oil circuit seat upper surface center is equipped with the mounting hole, is equipped with in the mounting hole rather than assorted butt joint oil feeding structure, its characterized in that: the middle part of the oil way seat is provided with a fixing hole which transversely penetrates through the oil way seat; the inner wall of the hole at the left end of the fixed hole is provided with a left annular groove; the inner wall of the hole at the right end of the fixed hole is provided with a right annular groove; fixing columns matched with the fixing holes are arranged in the fixing holes; the center of the fixed column is provided with a switching hole which axially penetrates through the fixed column; a switching rod matched with the switching hole is arranged in the switching hole; the left end of the switching rod penetrates out of the switching hole leftwards and is provided with a left pressing structure matched with the left groove; the right end of the switching rod penetrates out of the switching hole to the right and is provided with a right pressing structure; the lower surface of the oil way seat is provided with a first oil hole and a second oil hole; the inner wall of the middle part of the fixed hole is provided with a first oil way communicated with the first oil hole; second oil ways communicated with the second oil holes are arranged on the inner walls of the left side and the right side of the fixed hole; the upper surface of the fixed hole is provided with a third oil way and a fourth oil way which are communicated with the butt joint oil feeding structure; the fixed column is provided with an oil passing structure matched with the third oil way and the fourth oil way; and the switching rod is provided with an oil circuit switching structure matched with the oil passing structure.

2. An oil path switching handle for rescue equipment according to claim 1, wherein: the oil way switching structure comprises a first annular groove, a second annular groove, a third annular groove and a fourth annular groove which are sequentially arranged on the outer wall of the switching rod from left to right; the upper part of the third annular groove is communicated with the lower part of the fourth annular groove through a first inclined hole; the lower part of the third annular groove is communicated with the upper part of the fourth annular groove through a second inclined hole; the first inclined hole and the second inclined hole are crossed and communicated; the front part of the first annular groove is communicated with the rear part of the second annular groove through a third inclined hole; the rear part of the first annular groove is communicated with the front part of the second annular groove through a fourth inclined hole; the third inclined hole and the fourth inclined hole are crossed and communicated.

3. An oil path switching handle for rescue equipment according to claim 2, wherein: the oil passing structure comprises a plurality of first oil passing grooves, second oil passing grooves, third oil passing grooves, fourth oil passing grooves and fifth oil passing grooves which are arranged on the outer wall of the fixed column from left to right, wherein the first oil passing grooves, the second oil passing grooves, the third oil passing grooves, the fourth oil passing grooves and the fifth oil passing grooves are all annular; the bottom of the first oil passing groove is provided with a plurality of first oil passing holes communicated with the switching holes; the bottom of the second oil passing groove is provided with a plurality of second oil passing holes communicated with the switching holes; the bottom of the third oil-passing groove is provided with a plurality of third oil-passing holes and third auxiliary holes communicated with the switching holes, and the third auxiliary holes are positioned at the left side of the third oil-passing holes; the bottom of the fourth oil groove is provided with a plurality of fourth oil holes communicated with the switching holes; the bottom of the fifth oil groove is provided with a plurality of fifth oil holes communicated with the switching holes; the first oil way is communicated with the third oil way; the first oil passing groove is communicated with the left second oil way, and the fifth oil passing groove is communicated with the right second oil way; the switching rod shields and seals the inner end orifice of the second oil through the outer wall of the switching rod; the third oil way is communicated with the second oil through groove, and the fourth oil way is communicated with the second oil through groove.

4. An oil circuit switching handle for rescue equipment according to claim 3, wherein: the oil conveying structure comprises a fixed seat which is screwed in the mounting hole; a pair of seats are arranged in the center of the upper surface of the fixed seat; the fourth oil upper end port is positioned at the center of the bottom of the mounting hole, and the third oil upper end port is positioned at the right side of the bottom of the mounting hole; the inner wall of the port at the upper end of the fourth oil circuit is provided with a lower positioning step which is annular; a lower oil feeding hole is formed in the center of the lower surface of the fixed seat; an upper oil feeding hole is formed in the center of the upper surface of the butt joint seat, and the diameter of the upper oil feeding hole is smaller than that of the lower oil feeding hole; an annular upper positioning step is arranged on the inner wall of the hole at the lower end of the lower oil feeding hole; an oil needle coaxial with the port at the upper end of the first oil path is arranged in the lower oil feeding hole, and the lower end of the oil needle is propped against the lower positioning step; the outer wall of the lower end of the oil needle is provided with a positioning part matched with the upper positioning step; an oil feeding gap is formed between the lower surface of the positioning part and the bottom of the mounting hole; the upper surface of the positioning part is provided with a plurality of oil delivery holes communicated with the oil delivery gap; the upper end of the oil needle upwards passes through the upper oil feeding hole; the upper part of the oil needle is sleeved with a sliding sleeve matched with the upper oil feeding hole; the inner wall of the upper oil feeding hole is provided with an annular limiting step; the outer wall of the sliding sleeve is provided with an annular limiting part, and the upper surface of the limiting part is attached to the limiting step; a pressure spring sleeved outside the oil needle is arranged between the lower end surface of the sliding sleeve and the upper surface of the positioning part; the center of the lower surface of the oil needle is provided with a center hole; the outer wall of the upper part of the oil needle is provided with a plurality of upper perforations and lower perforations communicated with the central hole, and the lower perforations are positioned right below the upper perforations; the upper perforated outer end orifice is sealed by the inner wall of the sliding sleeve in a shielding way, and the lower perforated outer end orifice is not sealed by the inner wall of the sliding sleeve in a shielding way.

5. The oil path switching handle for rescue equipment according to claim 4, wherein: the outer wall of the middle part of the oil needle is provided with an annular clamping step.

6. An oil circuit switching handle for rescue equipment according to claim 3, wherein: the left pressing structure comprises a left connecting hole arranged in the center of the left end face of the switching rod; a left button matched with the left groove is arranged in the left groove; the center of the side wall at the right side of the left button is provided with a left embedded hole matched with the left end of the switching rod; the center of the left side wall of the left button is provided with a left pressing groove coaxial with the left embedded hole; the left pressing groove is communicated with the left embedded hole through a left through hole; a left screw passes through the left through hole rightwards and is screwed into the left connecting hole, and the head of the left screw is pressed at the bottom of the left pressing groove; the bottom of the left groove is provided with a plurality of left spring grooves which are uniformly distributed in circumference; the notch at the left end of the left spring groove is in threaded connection with a left limiting ring; a left reset pin matched with the left spring groove is arranged in the left spring groove; the outer wall of the left reset pin is provided with a left annular bulge which is attached to the right side wall of the left limiting ring; a left reset spring sleeved outside the lower end of the left reset pin is arranged between the right side wall of the left annular bulge and the bottom of the left spring groove; the left end of the left reset pin penetrates through the inner hole of the left limiting ring leftwards and is propped against the right side wall of the left button.

7. An oil circuit switching handle for rescue equipment according to claim 3, wherein: the right pressing structure comprises a right connecting hole arranged in the center of the right end face of the switching rod; a right button matched with the right groove is arranged in the right groove; the center of the left side wall of the right button is provided with a right embedded hole matched with the right end of the switching rod; a right pressing groove coaxial with the right embedding hole is formed in the center of the right side wall of the right button; the right pressing groove is communicated with the right embedding hole through a right through hole; a right screw passes through the right through hole leftwards and is screwed into the right connecting hole, and the head of the right screw is pressed at the bottom of the right pressing groove; the bottom of the right pressing groove is provided with a plurality of right spring grooves which are uniformly distributed in the circumference; the notch at the right end of the right spring groove is in threaded connection with a right limiting ring matched with the notch at the right end of the right spring groove; a right reset pin matched with the right spring groove is arranged in the right spring groove; the outer wall of the right reset pin is provided with a right annular bulge which is attached to the left side wall of the right limiting ring; a right reset spring sleeved outside the left end of the right reset pin is arranged between the left side wall of the right annular bulge and the bottom of the right spring groove; the right end of the right reset pin rightwards passes through the inner hole of the right limiting ring and is propped against the left side wall of the right button.