CN101665222B

CN101665222B - Horizontal screw jack

Info

Publication number: CN101665222B
Application number: CN200810195642A
Authority: CN
Inventors: 施志强; 陈有源
Original assignee: Changshu Tongrun Auto Accessory Co Ltd
Current assignee: Changshu Tongrun Auto Accessory Co Ltd
Priority date: 2008-09-01
Filing date: 2008-09-01
Publication date: 2012-10-10
Anticipated expiration: 2028-09-01
Also published as: CN101665222A

Abstract

The invention provides a horizontal screw jack, which is characterized in that one end of a connecting rod (5) is rotatably linked with a linking block (6) with a screwed hole. A screw (7) and the linking block form a screw pair. One end of the screw (7) is fixedly linked with a large conical gear (8). A thrust ball bearing (24) is arranged between the rear shoulder flat surface of the large conical gear (8) and a bearing seat (25). A small conical gear (9) is coaxially and fixedly linked with a ratchet wheel (10) and is in an engaging state with the large conical gear (8). A ratchet wheel shell (11) contains the ratchet wheel (10) and realizes the hole shaft clearance fit with the fixedly connected shaft of the small conical gear (9). A left portion ratchet gear body and a right portion ratchet gear body which can be matched with the ratchet wheel (10) are arranged on a dental propping mandrel (12). The dental propping mandrel (12) moves left and right within the central hole of the ratchet wheel shell (11). The technical scheme can reduce the cost of the structure and improve the use safety.

Description

The horizontal screw jack

Technical field

The present invention relates to horizontal jack, especially relate to a kind of horizontal screw jack.

Background technology

Jack is divided into vertical jack and horizontal jack usually.Horizontal jack structure generally is combined as many with mechanical system and hydraulic efficiency pressure system.After using hydraulic horizontal jack jacking vehicle or loaded article, often must just can guarantee that space that personnel get into vehicle, loaded article below carries out operation and keep in repair to the pre-prepd paired support with being fallen by the jacking thing to put.Though hydraulic horizontal jack jacking weight is more laborsaving, it is irreplaceable emergency support supporting weight below weight, and this just makes that the entire job program before and after the lifting is comparatively loaded down with trivial details; Its hydraulic unit processed complex, cost are high again, are unfavorable for the market competition of product.

Summary of the invention

For overcoming above-mentioned defective; The present invention proposes a kind of new horizontal jack structure scheme; The horizontal jack of conventional hydraulic is changed into the synthetic mechanical type jack of structural group such as screw thread pair, conical gear, also can be realized preferably by the safety supports of jacking thing with the infrastructure cost that reduces the jack drive element effectively.

Horizontal screw jack provided by the invention; Comprise pallet, crane arm, axis, plate, frame, preceding wheels, universal wheels energetically; It is characterized in that: an end of connecting rod rotates with the coupling block that is threaded the hole and connects; Screw rod and coupling block are formed screw thread pair, and an end of screw rod is fixedly connected with large conical gear enforcement, and between the back shaft shoulder plane of large conical gear and bearing seat, are provided with thrust ball bearing; Small conical gear and coaxial ratchet connect firmly; And being in engagement with large conical gear, ratchet shell contains ratchet and realizes that with the axle that is fixedly connected of small conical gear a hole axle slack cooperates, supports the tooth mandrel and is provided with the left part ratchet denticle and the right part ratchet denticle that can cooperate with ratchet.

Again: an end of said screw rod is provided with stop collar; Support tooth mandrel is provided with hoist taper knock hole and decline taper knock hole; Stage clip and steel ball are installed in ratchet shell; Ratchet shell is provided with handle hole; Screw rod is captiveed joint through semi-round key with large conical gear.

The principle of work of horizontal screw jack provided by the invention is following:

The process of pallet hoists: the right part ratchet denticle that will support the tooth mandrel cooperates with the ratchet location; Clockwise rotate ratchet shell; Ratchet clockwise rotates under the stirring of right part ratchet denticle; Make with ratchet and connect firmly small conical gear rotates and transmission is engaged with large conical gear and screw rod thereof on same axle; So that the sinistral external thread of screw rod rotates in the negative thread of coupling block, impel coupling block to make clockwise rotation and institute's loads on the jacking pallet around axis through connecting rod tractive crane arm.When ratchet shell and right part ratchet denticle cw are pressed to end position; On carry ratchet shell or to carry ratchet shell on the operating handle; Just can regulate by gap and the stage clip of support tooth mandrel in the corresponding mating holes of ratchet shell, the automatic come-up of steel ball; And the right part ratchet denticle that drives support tooth mandrel upwards slides onto suitable height after breaking away from the ratchet teeth groove on the excircle of ratchet profile of tooth; Press down ratchet shell and support tooth mandrel again; Right part ratchet denticle just get into again the ratchet teeth groove to drive the ratchet dextrorotation then the repetition screw rod to the release of coupling block to make crane arm once again and clockwise rotate and to continue the jacking pallet to top offset, with this reciprocation cycle, can make pallet head on weight and constantly rise to limiting altitude.

The process of decline pallet: the left part ratchet denticle that will support the tooth mandrel cooperates with the ratchet location; Rotate counterclockwise ratchet shell; Ratchet rotates counterclockwise under the stirring of left part ratchet denticle; Make with ratchet and be fixedly connected on small conical gear rotates and transmission is engaged with large conical gear and screw rod thereof on the same axle; So that the sinistral external thread of screw rod rotates in the negative thread of coupling block; Coupling block in the displacement is just pushing away crane arm through connecting rod and is rotating counterclockwise around axis and reduce pallet height, and after ratchet shell and left part ratchet denticle conter clockwise were depressed into end position, cw pressed down ratchet shell or presses down ratchet shell with operating handle again; Just can regulate and the left part ratchet denticle that drives support tooth mandrel breaks away from the ratchet teeth groove can be on the excircle of ratchet profile of tooth to slide onto suitable height to upper by the automatic come-up of gap and the stage clip of support tooth mandrel in the corresponding mating holes of ratchet shell, steel ball; Carry ratchet shell and support tooth mandrel again, left part ratchet denticle just is pressed into the ratchet teeth groove again to drive the ratchet left-hand revolution, drawing in of coupling block is further being pushed away connecting rod with the continuation screw rod and crane arm is being rotated counterclockwise so that pallet continues to bottom offset; Do this reciprocation cycle, can make pallet constantly drop to extreme lower position.

In the preferred version of invention, the other end of screw rod is provided with stop collar, to ensure the function of the screw thread pair that coupling block and screw rod are formed, also is spacing to the pallet rise height.

The invention has the beneficial effects as follows: with ratchet denticle mesh ratchet gear; With small conical gear transmission large conical gear and coaxial screw rod thereof; The pallet that connects with the crane arm rotation hoists or the combination mechanism that descends has stronger functional reliability thereby the coupling block that is in the screw thread pair rotation is produced drive along the dynamic property displacement of screw axial; Institute's jacking weight in height there is safe locking position; Again because its good structural machinability, cost are lower, thereby this technical scheme had the advantage that performance is good, cost is low concurrently, and good safety supports is arranged.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the present invention is done further description.

Fig. 1 is the plan structure figure of the embodiment of the invention;

Fig. 2 is the A-A cutaway view of the embodiment of the invention on Fig. 1;

Fig. 3 is that the A of the relative Fig. 1 of the embodiment of the invention is to view;

Fig. 4 be the embodiment of the invention at the B-B of Fig. 1 cutaway view, it has reflected the engagement of ratchet and support tooth mandrel right part ratchet denticle when implementing lifting functions;

Fig. 5 is that the embodiment of the invention will support the move to right engagement figure of back ratchet and support tooth mandrel left part ratchet denticle of tooth mandrel on Fig. 4 basis;

Fig. 6 is the C-C cutaway view of the embodiment of the invention on Fig. 1;

Parts title shown in each label is following in the accompanying drawing:

1. pallet; 2. crane arm; 3. axis; 4. plate energetically; 5 connecting rods; 6. coupling block; 7 screw rods; 8. large conical gear; 9. small conical gear; 10. ratchet; 11. ratchet shell; 12. support tooth mandrel; 13. left part ratchet denticle; 14. right part ratchet denticle; 15. stop collar; The taper knock hole 16. hoist; 17. decline taper knock hole; 18. stage clip; 19. steel ball; 20. handle hole; 21. frame; 22. preceding wheels; 23. universal wheels; 24. thrust ball bearing; 25. bearing seat; 26. bearing pin; 27. sleeve pipe; 28. bearing pin; 29. small conical gear axle.

The specific embodiment

In an embodiment of the present invention, be respectively equipped with preceding wheels 22, universal wheels 23 on the frame 21; Pallet 1 and assembly set thereof use bearing pin 26 to realize that rotation connects with an end of crane arm 2, realize rotating with the axis hole of axis 3 and sleeve pipe 27 connecting, and the two ends section of axis 3 is positioned in the mating holes of frame 21; Plate 4 is welded on the belly of crane arm 2 energetically, and connects firmly with sleeve pipe 27 cylindricals; With 28 pairs of plate 4 and connecting rod 5 realization rotation connections energetically of bearing pin; The other end of connecting rod 5 realizes that with the termination of coupling block hole axle rotation connects; The tapped bore of screw rod 7 and coupling block 6 forms screw thread pair and cooperates, and is provided with the stop collar 15 that connects surely with screw rod end state in the termination of screw rod 7, and screw rod 7 connects with fixing after large conical gear 8 is located; Bearing seat 25 is positioned and is fixedly connected on frame 21, and cooperates with the smooth and round section enforcement hole axle slack of screw rod 7, makes axial location on the centerline hole of the relative bearing seat 25 of assembly sets such as screw rod; Be provided with thrust ball bearing 24 between the shaft shoulder plane of large conical gear 8 back and the end face of bearing seat 25; With large conical gear 8 ingear small conical gears 9 and ratchet 10 coaxial assemblings; And relative fixed; Between the mating holes of small conical gear axle 29 and ratchet shell 11 is that intermittence hole axle cooperates, and forms revolute pair, and the handle hole of operation usefulness is arranged on the top of ratchet shell 11; The mider hole of said ratchet shell 11 is implemented to cooperate with the hole axle slack of support tooth mandrel 12, can realize supportting the sway of tooth mandrel 12 in the mider hole of ratchet shell 11; On support tooth mandrel 12 cylindricals, be provided with hoist taper knock hole 16 and decline taper knock hole 17; And can be provided with stage clip 18 and steel ball 19 in the corresponding ratchet shell 11 with said two knock holees; When the taper knock hole 16 that hoists of support tooth mandrel 12 was located with steel ball 19 elasticity, the right part ratchet denticle 14 of support tooth mandrel 12 cooperated running with ratchet 10; When falling taper knock hole 17 with steel ball 19 elasticity location under the support tooth mandrel 12, the left part ratchet denticle 13 of support tooth mandrel 12 cooperates running with ratchet 10.

Claims

1. horizontal screw jack; Comprise pallet, crane arm, axis, plate, frame, preceding wheels, universal wheels energetically; It is characterized in that: an end of connecting rod (5) rotates with the coupling block that is threaded the hole (6) and connects; Screw rod (7) is formed screw thread pair with coupling block; One end of screw rod (7) and large conical gear (8) are implemented to be fixedly connected, and between the back shaft shoulder plane of large conical gear (8) and bearing seat (25), are provided with thrust ball bearing (24), small conical gear (9) and coaxial the connecting firmly of ratchet (10); And be in engagement with large conical gear (8); Ratchet shell (11) contains ratchet (10) and realizes that with the axle that is fixedly connected of small conical gear (9) the hole axle slack cooperates, and support tooth mandrel (12) is provided with the left part ratchet denticle and the right part ratchet denticle that can cooperate with ratchet (10), support tooth mandrel (12) sway in the mider hole of ratchet shell (11).

2. horizontal screw jack according to claim 1 is characterized in that: an end of said screw rod (7) is provided with stop collar (15).

3. horizontal screw jack according to claim 1 is characterized in that: said support tooth mandrel (12) is provided with hoist taper knock hole (16) and decline taper knock hole (17), and stage clip (18) and steel ball (19) are installed in ratchet shell (11).

4. horizontal screw jack according to claim 1 is characterized in that: said ratchet shell (11) is provided with handle hole (20).

5. horizontal screw jack according to claim 1 is characterized in that: said screw rod (7) is fixedly connected through semi-round key with large conical gear (8).