CN102285607A

CN102285607A - Hoisting jack with low press hand

Info

Publication number: CN102285607A
Application number: CN2011101983270A
Authority: CN
Inventors: 殷吉华; 张耀心; 陈有源
Original assignee: CHANGSHU TONGRUN AUTO JACK Co Ltd
Current assignee: CHANGSHU TONGRUN AUTO JACK Co Ltd
Priority date: 2011-07-15
Filing date: 2011-07-15
Publication date: 2011-12-21

Abstract

The invention discloses a hoisting jack with a low press hand. The hoisting jack comprises a pedestal, an oil cylinder component, a piston rod component, an outer sleeve component, a top cap component, an oil return valve rod component, a pump body component, a pump core component, a press hand component and an integrated valve block, and is characterized in that: the press hand component is formed by welding a stepped stamped part and a steel pipe; a left side plate is integrally connected with a right side plate by a plate block on the upper part of the stepped stamped part; the lower end parts of the left side plate and the right side plate are connected with two bus positions on the rear part of the press hand through electric welding respectively; the left side plate and the right side plate are coaxially provided with a first pin shaft hole and a second pin shaft hole; transition inner circular arc surfaces are arranged at lower right-angled inner bent positions on the left side plate and the right side plate; a press hand plug hole is formed at an axial position of the rear part of the press hand; and the rear part of the press hand is upswept. The hoisting jack has the beneficial effects that: 1, the oil suction travel and the oil pressing travel of the jack are guaranteed; and 2, the bending rigidity and strength of the press hand component are improved.

Description

Have low level and press the vertical oil jack of hand

Technical field

The present invention relates to a kind of oil jack, is a kind of vertical oil jack that low level is pressed hand that has specifically.

Background technology

Vertical oil jack is as driver's tool, and the quality of its operating characteristic is concerning successfully can maintenance maintenance automobile, particularly the applicability effect in changing motor tire work should have speciality obtain performance with it in many occasions.Traditional vertical oil jack because will be dispersed in everywhere oil sucting one-way valve of its base, press oily check valve, safe pressure regulating valve central combination on a less valve body, make manufacturing, the debug process of jack become simple.Yet, after this integrated form combinaing valve body is placed into the base aperture of pump housing below, just drawn so problem again: guarantee that pump housing pump core has enough upper and lower displacement spaces to realize oil suction efficiently, press the oil operation, the height that then should keep former pump housing pump core, like this, be used to affect the pump core to do pressing hand unit and will appearing out it suddenly and cause because of the place, position is high-order when pressing hand and upwards rotating of upper and lower displacement, the operating handle collision car crust that connects with it, cause the damage of automobile case paint, limit vertical oil jack oil suction and pressed oily stroke, operating efficiency is had a greatly reduced quality, and the blanked part of conventional confguration is pressed hand owing to can bear very big moment of flexure effect, easily deforms cracking and causes the functional inefficacy of jack.

Summary of the invention

The objective of the invention is to defective at above-mentioned prior art scheme, be conceived to effectively solve upwards affecting in the process to pressing hand, the suction that operating handle collision car crust causes, press oily stroke not enough and press hand intensity lack cause press the hand problems of crack, propose will the blanked part of an original straight tube-like to press hand and change over the member of stepped inversion " U " the shape opening that is shaped with blanked part and a steel pipe complete stepped hand unit of pressing of composition one that is welded as a whole, and rotate on the pump core that connects in the pump housing end with two place's revolute pairs respectively and press end on the hand connecting rod, moving up and down of operate pump core implemented the oil suction of oil jack, press the function of oil and safe draining.

Above-mentioned purpose of the present invention is achieved through the following technical solutions: a kind of have a vertical oil jack that low level is pressed hand, comprise base, cylinder part, piston rod part, outer casing part, the top cap member, the fuel-return valve rod unit, pump housing parts, the pump core components, press hand unit, integrated valve block, it is characterized in that: press hand unit and be welded by a stepped blanked part and a steel pipe, the top plate of stepped blanked part is coupled as one left side board and right side board, left side board, right side board bottom is separately carried out electric welding respectively and is connect in the bus position, two places of pressing the hand rear portion, on left side board and right side board, be manufactured with first pin shaft hole and second pin shaft hole coaxially, and left side board and right side board up and down in the right angle bending position be provided with the transition inner arc surface, be provided with in the axial location of pressing the hand rear portion and press hand inserting hole, again, the centerline hole of pressing the hand rear portion departs from horizon and makes it to be and upwarps shape.

The beneficial effect that the present invention compared with prior art has: the one, reduced the position height of pressing hand and operating handle junction effectively, guarantee jack oil suction, press oily stroke; The 2nd, improved the bending stiffness and the intensity of pressing hand unit greatly.

Description of drawings

The description of drawings of embodiment:

Figure 1 shows that the front view of the embodiment of the invention;

Fig. 2 is the birds-eye view of relative Fig. 1;

Fig. 3 is the right elevation of relative Fig. 1;

Fig. 4 is " A-A " cutaway view on relative Fig. 1;

Fig. 5 is present embodiment has increased the local section structure on Fig. 1 basis a view

Fig. 6 is a front view of pressing hand unit;

Fig. 7 is the birds-eye view of relative Fig. 6;

Fig. 8 is the right elevation of relative Fig. 6;

Fig. 9 is relative Fig. 6 " C-C " cutaway view;

Figure 10 is relative Fig. 9 " B-B " section-drawing.

The parts title is as follows shown in each label of accompanying drawing:

1 base, 2 cylinder parts, 3 piston rod parts, 4 outer casing parts, 5 top cap members, 6 fuel-return valve rod units, 7 pump housing parts, 8 pump core components, 9 press hand unit, 10 integrated valve blocks, 11 press the hand connecting rod, 12 base pitman pins, and 13 connecting rods are pressed the hand bearing pin, 14 press hand pump core bearing pin, 15 compression springs, 16 pressure regulation plug screws, 17 screw thread pairs, 18 second press oil circuit, and 19 first press oil circuit, 20 press oily check valve steel ball, the self-closing stage clip of 21 valves, 22 oil throughs, 23 tubing strings, 24 high pressure are pressed oil circuit, 25 low pressure oil suction lines, 26 ring-type low pressure oil circuits, 27 oil cylinder working oil chambers, 28 shoe cream rooms, 29 pump housing oil pockets, 30 oil sucting one-way valve steel balls, 31 pressure regulation steel balls, 32 spring perches, 33 press the hand rear portion, 34 first weld seams, 35 second weld seams, 36 left side boards, 37 right side boards, 38 top plates, 39 first pin shaft holes, 40 second pin shaft holes, 41 transition inner arc surfaces, 42 unidirectional oil-feed oil circuits, 43 press hand inserting hole.

The specific embodiment

The invention will be further described below in conjunction with the accompanying drawing of embodiment, to help the understanding of the public to this case technology contents and effect, but the description of embodiment is not constituted restriction to the technical program, any category of having done according to this case design that only all should be considered as this case technical scheme for pro forma equivalent transformation.

By each accompanying drawing as seen, the embodiment of the invention is on traditional vertical oil jack basis, the oil sucting one-way valve of each scattered distribution of past, press oily check valve, safe pressure regulating valve concentrated area is arranged on the small and exquisite integrated valve block and sets up that low level is pressed hand and a kind of new construction scheme of forming, this low level is pressed hand and is applied to vertical oil jack, Guan Lian member mainly contains with it: cylinder part 2 and base 1 are with the electric welding sealed connection, connect with screw thread pair between pump housing parts 7 and the base 1, outer casing part 4 connects firmly on base 1 hermetically with electric welding, top cap member 5 is with electric welding sealed connection outer casing part 4, and pump core components 8 is inserting pump housing parts 7 back formation pump housing oil pockets 29; Form shoe cream room 28 in the outer casing part 4; The effect of fuel-return valve rod unit 6 is that the pressure oil in the oil cylinder working oil chamber 27 is imported shoe cream room 28 through fuel-return valve, so that in the piston rod part 3 retraction cylinder parts 2 that are ejected.The pump housing parts 7 that the above relates to are before connecting base 1 with its screw thread pair, be at first to put into the integrated valve block 10 that has lower seal and back seal spare in the appearance valve space below pump housing parts, then rely on end face under the pump housing parts 7 to force ring-type low pressure oil circuit 26 to locate to implement sealing at neighbouring to the pressure of bottom offset, the low pressure oil suction line 25 that is communicated with shoe cream room 28 is linked up with ring-type low pressure oil circuit 26, and the high pressure that is communicated with oil cylinder working oil chamber 27 presses the oil circuit 24 and the appearance valve space of integrated valve block 10 bottoms to link up; On integrated valve block 10, be provided with the pressure regulation plug screw 16 that adopts screw thread pair 17 pressure that connect and scalable compression spring 15 with it, being axially arranged with of pressure regulation plug screw 16 has second of damping hole and presses oil circuit 18, and the top of compression spring 15 is provided with spring perch 32 and is used for the pressure regulation steel ball 31 of safe pressure regulating valve; The upper end of pump core components 8 cooperates first pin shaft hole 39 to implement to press hand unit 9 to connect with revolute pair between the pump core components 8 to press hand pump core bearing pin 14, pressing hand bearing pin 13 at the leading section of pressing hand unit 9 with connecting rod cooperates second pin shaft hole 40 to implement to connect with the revolute pair of pressing hand connecting rod 11, pressing the bottom of hand connecting rod 11 implements to connect with the revolute pair of base 1 with base pitman pin 12, and the afterbody of pressing hand unit 9 is and presses hand rear portion 33, and the centerline hole of pressing hand rear portion 33 departs from horizon and is and upwarps shape; In integrated valve block 10, be provided with oil sucting one-way valve steel ball 30, its upper area is a pump housing oil pocket 29, and its lower zone is provided with the unidirectional oil-feed oil circuit 42 that is communicated with ring-type low pressure oil road 26, and ring-type low pressure oil circuit 26 then leads to low pressure oil suction line 25 and shoe cream room 28; Again, in integrated valve block 10, be provided with press oily check valve steel ball 20 above be to be communicated with first of pump housing oil pocket 29 to press oil circuit 19, press the below of oily check valve steel ball 20 to be provided with the self-closing stage clip 21 of valve, tubing string 23, be axially arranged with oil through 22 at tubing string 23, oil through 22 is communicated with high pressure and presses oil circuit 24 until oil cylinder working oil chamber 27; The described stepped appearance blanked part of pressing hand unit 9 of present embodiment is made of left side board 36, right side board 37 and top plate 38 fundamentals, top plate 38 is coupled as one left side board 36, right side board 37, on left side board and right side board, be manufactured with first pin shaft hole 39 and second pin shaft hole 40 coaxially, and biside plate up and down in the right angle bending position be provided with the transition inner arc surface 41 that reduces stress concentration, the biside plate bottom is carried out electric welding respectively and is connect and form first weld seam 34 and second weld seam 35 in the bus position, two places of solid drawn pipe.

The embodiment of the invention is to use like this: at first screw fuel-return valve rod unit 6, but so that the straight circuit of oil cylinder working oil chamber 27 and shoe cream room 28 be cut off; Press hand inserting hole 43 with suitable operating handle insertion, hand unit 9 is pressed in operation makes it to rely on base pitman pin 12, connecting rod is pressed hand bearing pin 13 and is pressed hand pump core bearing pin 14 and carry out the associativity rotation, make pump core components 8 make the crank motion of upper and lower displacement in pump housing parts 7: pump core components 8 is by when top offset, hydraulic oil in the shoe cream room 28 under the pressure of atmosphere through low pressure oil suction line 25, ring-type low pressure oil circuit 26, unidirectional oil-feed oil circuit 42, oil sucting one-way valve steel ball 30 enters pump housing oil pocket 29, when pump core components 8 is pressed down displacement, the high pressure oil that forms in the pump housing oil pocket 29 will press oil circuit 19 through pressing oily check valve steel ball 20 by first, oil through 22, high pressure presses oil circuit 24 to be pressed into oil cylinder working oil chamber 27, this just causes piston rod part 3 to top offset and the jacking weight, reciprocation cycle successively can be constantly finished by the lifting of lifting thing by piston rod part 3; When being caused oil pressure in the pump housing oil pocket 29 to surpass the setting of safe pressure regulating valve by factors such as the lifting thing are overweight; this moment the pump core press down unnecessary pressure oil that displacement forms just can by way of second push back oil circuit 18, pressure regulating valve steel ball 31 enters the ring-type low pressure oil circuit 26 that is communicated with shoe cream room 28; thereby make pump core components 8 in pressing oily process, can't continue pressure oil is sent into oil cylinder working oil chamber 27, with the overpressure protection of this defencive function enforcement to relevant jacking thing and jack itself.Jack unscrews fuel-return valve rod unit 6 with after finishing, and oil cylinder working oil chamber 27 just makes with shoe cream room 28 conducting oil returns in the piston rod part 3 withdrawal cylinder parts 2.

Claims

1. one kind has the vertical oil jack that low level is pressed hand, comprise base, cylinder part, piston rod part, outer casing part, the top cap member, the fuel-return valve rod unit, pump housing parts, the pump core components, press hand unit, integrated valve block, it is characterized in that: press hand unit (9) and be welded by a stepped blanked part and a steel pipe, on left side board (36) and right side board (37), be manufactured with first pin shaft hole (39) and second pin shaft hole (40) coaxially, and left side board (36) and right side board (37) up and down in the right angle bending position be provided with transition inner arc surface (41), be provided with in the axial location of pressing hand rear portion (33) and press hand inserting hole (43).

2. according to claim 1 have a vertical oil jack that low level is pressed hand, and it is characterized in that: the top plate (38) of stepped blanked part is coupled as one left side board (36) and right side board (37).

3. according to claim 1 have a vertical oil jack that low level is pressed hand, it is characterized in that: the described centerline hole of pressing hand rear portion (33) departs from horizon and makes it to be and upwarps shape.

4. according to claim 1 have a vertical oil jack that low level is pressed hand, it is characterized in that: left side board (36), right side board (37) bottom are separately carried out electric welding respectively and are connect in the bus position, two places of pressing hand rear portion (33).