Crank type jack for hoisting

Abstract

The utility model relates to the technical field of jacks, and particularly discloses a crank type jack for lifting, which comprises a lower fixing plate, a secondary telescopic rod arranged at the top of the lower fixing plate, a primary telescopic rod slidably connected to the outer surface of the secondary telescopic rod, an outer telescopic pipe sleeved on the outer surface of the primary telescopic rod, and a gear box fixedly connected to the top of the outer telescopic pipe. A first gear flange box is fixedly connected to the top left side of the gear box. Through the arrangement of the crank assembly, the gear main shaft and the first-stage screw, the requirement that the gear main shaft rotates to drive the first-stage screw to rotate is met, meanwhile, through the arrangement of the first-stage nut, the second nut, the first-stage telescopic rod and the outer telescopic pipe, the telescopic effect of the first-stage telescopic rod and the outer telescopic pipe is met, and the situation that the size of a single stroke is too large in the using process is avoided; therefore, the jack with a long stroke cannot be installed in a lot of compact spaces, normal use of the jack is affected, and the utilization rate of the crank type jack can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to jack technical field especially is concerned with a lifting use ratchet type jack. BACKGROUND

[0002] The jack is the light and small hoisting equipment that uses rigid top lifting piece as working device, through the small stroke of top support or bottom support claw to open heavy object, and the jack is mainly used in factory and mine, transportation department as vehicle repair and other hoisting, supporting and other work, and its structure is light, firm, flexible and reliable, and one person can carry and operate.

[0003] In prior art, the single stroke volume is too large when using, so that the jack with long stroke cannot be installed in many compact spaces, thereby reducing the use rate of the jack. SUMMARY

[0004] The utility model discloses a lifting use ratchet type jack, can stroke lengthen, the overall appearance is small, and operation is more relaxed, to solve the problem in the above background technique.

[0005] To achieve the above object, the utility model provides the following technical scheme: a lifting use ratchet type jack, including lower fixed plate, the lower fixed plate top is provided with two-stage telescopic link, the two-stage telescopic link outer surface sliding connection has one-stage telescopic link, the one-stage telescopic link outer surface sleeve joint has outer telescopic pipe, the outer telescopic pipe top fixedly connected with gear box, the gear box top left side fixedly connected with first gear flange box, the gear box top right side fixedly connected with second gear flange box, the second gear flange box inside rotationally connected with ratchet handle assembly, the second gear flange box inside sleeve joint has second deep groove ball bearing at the ratchet handle assembly outer surface, the two-stage telescopic link inner thread connection has one-stage screw rod, the one-stage screw rod outer surface sleeve joint has one-stage nut, the one-stage nut bottom fixedly connected with two-stage screw rod, the one-stage screw rod outer surface sleeve joint has two-stage nut at the one-stage nut bottom, the two-stage nut bottom and one-stage telescopic link top fixedly connected, the one-stage screw rod top fixedly connected with pinion, the ratchet handle assembly extends to the first gear flange box inside one end fixedly connected with gear spindle, the ratchet handle assembly outer surface fixed sleeve joint has large gear.

[0006] Preferably, the one-stage screw rod outer surface top sleeve joint has first deep groove ball bearing, the one-stage screw rod outer surface located at the first deep groove ball bearing bottom sleeve joint has thrust ball bearing, the pinion and large gear are engaged.

[0007] Preferably, the one-stage screw rod outer surface located at two-stage nut inside top sleeve joint has third deep groove ball bearing, the one-stage screw rod outer surface located at the third deep groove ball bearing bottom sleeve joint has bearing gland, the bearing gland bottom fixedly connected with shaft elastic baffle.

[0008] Preferably, the top of the first gear flange box and the second gear flange box is fixedly connected with an upper cover plate.

[0009] Preferably, the outer telescopic pipe is fixedly connected with a locking mounting plate on the right side of the outer surface, and the second screw rod is connected with a bolt at the bottom.

[0010] Preferably, the first screw nut, the second screw rod, the first screw rod, the second screw nut, the pinion, the gear wheel, the first gear flange box, the second gear flange box, the gear spindle, the bolt and the bearing gland are all made of # precision steel pipe heat treatment.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] The utility model discloses a rocking handle assembly, gear spindle and the first screw rod's setting satisfy the rotation of gear spindle and drive the rotation of first screw rod, utilize the setting of first screw nut, second screw nut, first telescopic rod and outer telescopic pipe simultaneously, satisfy the telescopic effect of first telescopic rod and outer telescopic pipe, avoid the single stroke volume in the use process too big, lead to many compact space to install the stroke longer jack, thereby influence the normal use of jack, be favorable to improve the use ratio of rocking handle jack. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the following will be briefly introduced to the drawings needed to be used in the specific embodiment or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0014] Figure 1 It is the overall structure view of the utility model;

[0015] Figure 2 It is the half cut structure schematic view of the utility model;

[0016] Figure 3 It is the half cut structure front view of the utility model;

[0017] Figure 4 It is the half cut structure front view of the utility model; Figure 2 It is the enlarged view of A in the utility model.

[0018] Explanation of reference signs:

[0019] 1, primary nut; 2, secondary screw rod; 3, primary screw rod; 4, secondary telescopic rod; 5, secondary nut; 6, primary telescopic rod; 7, outer telescopic tube; 8, gear box; 9, pinion; 10, gear wheel; 11, first gear flange box; 12, second gear flange box; 13, gear spindle; 14, upper cover plate; 15, lower fixed plate; 16, handle assembly; 17, bolt; 18, first deep groove ball bearing; 19, thrust ball bearing; 20, second deep groove ball bearing; 21, third deep groove ball bearing; 22, bearing gland; 23, elastic collar for shaft; 24, locking mounting plate. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0021] The utility model provides a technical scheme:

[0022] Please refer to Figures 1 to 4 A lifting handle type jack, including lower fixed plate 15, the lower fixed plate 15 top is provided with secondary telescopic rod 4, the secondary telescopic rod 4 outer surface is connected with primary telescopic rod 6 slidingly, the primary telescopic rod 6 outer surface is sleeved with outer telescopic tube 7, the outer telescopic tube 7 top is fixedly connected with gear box 8, the gear box 8 top left side is fixedly connected with first gear flange box 11, the gear box 8 top right side is fixedly connected with second gear flange box 12, the second gear flange box 12 inside rotationally connected with handle assembly 16, the second gear flange box 12 inside is located the outer surface of handle assembly 16 and is sleeved with second deep groove ball bearing 20, the secondary telescopic rod 4 is connected with primary screw rod 3 internally threaded, the primary screw rod 3 outer surface is sleeved with primary nut 1, the primary nut 1 bottom is fixedly connected with secondary screw rod 2, the primary screw rod 3 outer surface is located the bottom of primary nut 1 and is sleeved with secondary nut 5, the secondary nut 5 bottom is fixedly connected with primary telescopic rod 6 top, the primary screw rod 3 top is fixedly connected with pinion 9, handle assembly 16 extends to the one end fixedly connected with gear spindle 13 in first gear flange box 11, the outer surface of handle assembly 16 is fixedly sleeved with gear wheel 10;

[0023] The primary screw rod 3 outer surface top is sleeved with first deep groove ball bearing 18, the primary screw rod 3 outer surface is located the bottom of first deep groove ball bearing 18 and is sleeved with thrust ball bearing 19, the pinion 9 is engaged with gear wheel 10;

[0024] The outer surface of the primary screw 3 is sleeved with a third deep groove ball bearing 21 at the top inside of the secondary screw nut 5, the outer surface of the primary screw 3 is sleeved with a bearing gland 22 at the bottom of the third deep groove ball bearing 21, and the bottom of the bearing gland 22 is fixedly connected with an elastic shaft collar 23;

[0025] The top of the first gear flange box 11 and the second gear flange box 12 is fixedly connected with an upper cover plate 14;

[0026] The outer surface of the outer telescopic pipe 7 is fixedly connected with a locking mounting plate 24 on the right side, and the bottom of the secondary screw 2 is clamped with a bolt 17;

[0027] The primary screw nut 1, the secondary screw 2, the primary screw 3, the secondary screw nut 5, the pinion 9, the gear wheel 10, the first gear flange box 11, the second gear flange box 12, the gear spindle 13, the bolt 17 and the bearing gland 22 are all made of 45# precision steel pipe heat treatment.

[0028] By adopting the above technical scheme, when in use, the device body is directly and stably connected with the lower fixing plate 15 through the bolt 17, and the lower fixing plate 15 is arranged to protect the bottom of the device body, so that the device body can stand, the device is fixed at a position where it is needed through the locking mounting plate 24, the gear spindle 13 is driven to rotate by the handle assembly 16, the handle assembly 16 is rotated in the second gear flange box 12 through the second deep groove ball bearing 20, the large gear 10 is installed on the gear spindle 13, the small gear 9 is installed on the primary screw rod 3, the rotation of the gear spindle 13 drives the large gear 10 to rotate, the large gear 10 is engaged with the small gear 9, the large gear 10 and the small gear 9 are protected through the arrangement of the gear box 8, the gear box 8 is protected through the arrangement of the first gear flange box 11, and the first gear flange box 11 is protected through the arrangement of the upper cover plate 14, the rotation of the large gear 10 drives the small gear 9 to rotate, the rotation of the small gear 9 drives the primary screw rod 3 to rotate, the rotation of the primary screw rod 3 drives the secondary telescopic rod 4 to slide stably in the outer telescopic tube 7, and the rotation of the primary screw rod 3 drives the first deep groove ball bearing 18 and the thrust ball bearing 19 to rotate, when the primary screw rod 3 rotates, the primary nut 1 is driven to move up and down through the limiting action of the fixed sleeve pipe, the third deep groove ball bearing 21 is rotated on the primary screw rod 3 through the movement of the primary nut 1, the limiting effect is achieved through the elastic retaining ring 23 for shaft, the primary telescopic rod 6 is driven to move through the arrangement of the bearing pressing cover 22 during the rotation of the primary screw rod 3, the bottom of the primary screw rod 3 can drive the secondary screw rod 2 to rotate, the secondary nut 5 is limitingly and slidably connected in the primary telescopic rod 6, the secondary nut 5 is driven to move up and down after the secondary screw rod 2 rotates, the primary telescopic rod 6 is driven to move by the secondary nut 5, the double-stroke telescopic function is achieved, the inconvenience in use caused by the lengthening of the stroke and the small overall appearance is avoided, the speed increasing and decreasing gear operation is more relaxed, the lifting time is shortened through the double-stroke sleeve, and therefore the use rate of the handle type jack is improved.

[0029] Working principle: when using, rotate the handle assembly 16 to drive the gear spindle 13 to rotate, the gear spindle 13 is installed with a large gear 10, a small gear 9 is installed on the primary screw rod 3, the rotation of the gear spindle 13 drives the large gear 10 to rotate, the large gear 10 is engaged with the small gear 9, the rotation of the large gear 10 drives the small gear 9 to rotate, the rotation of the small gear 9 drives the primary screw rod 3 to rotate, when the primary screw rod 3 rotates, the primary nut 1 is driven to move up and down by the limiting action of the fixed sleeve, the primary screw rod 3 drives the primary telescopic rod 6 to move, at the same time, the primary screw rod 3 bottom can drive the secondary screw rod 2 to rotate, the primary telescopic rod 6 is limited to slide in the secondary nut 5, after the secondary screw rod 2 rotates, the secondary nut 5 moves up and down, the secondary nut 5 drives the primary telescopic rod 6 to move, achieves the function of double stroke telescopic, improves the utilization rate of the handle type jack.

[0030] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, but not limited to them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A lifting ratchet jack comprising a lower fixed plate (15), characterised in that: The lower fixed plate (15) top is provided with two-stage telescopic rod (4), the outer surface of two-stage telescopic rod (4) is slidably connected with a telescopic rod (6), the outer surface of telescopic rod (6) is sleeved with an outer telescopic tube (7), the top of outer telescopic tube (7) is fixedly connected with a gear box (8), the top of gear box (8) is fixedly connected with a first gear flange box (11) on the left side, the top of gear box (8) is fixedly connected with a second gear flange box (12) on the right side, the inside of second gear flange box (12) is rotatably connected with a crank handle assembly (16), the inside of second gear flange box (12) is sleeved with a second deep groove ball bearing (20) on the outer surface of crank handle assembly (16), the inside of two-stage telescopic rod (4) is threadedly connected with a first screw rod (3), the outer surface of first screw rod (3) is sleeved with a first screw nut (1), the bottom of first screw nut (1) is fixedly connected with a second screw rod (2), the outer surface of first screw rod (3) is sleeved with a second screw nut (5) at the bottom of first screw nut (1), the bottom of second screw nut (5) is fixedly connected with the top of telescopic rod (6), the top of first screw rod (3) is fixedly connected with a pinion (9), one end of crank handle assembly (16) extending into first gear flange box (11) is fixedly connected with a gear spindle (13), the outer surface of crank handle assembly (16) is fixedly sleeved with a large gear (10).

2. A lever jack as claimed in claim 1 wherein: The outer surface of first screw rod (3) is sleeved with a first deep groove ball bearing (18) at the top, the outer surface of first screw rod (3) is sleeved with a thrust ball bearing (19) at the bottom of first deep groove ball bearing (18), the pinion (9) is engaged with the large gear (10).

3. A lever jack as claimed in claim 1 wherein: The outer surface of first screw rod (3) is sleeved with a third deep groove ball bearing (21) at the top inside of second screw nut (5), the outer surface of first screw rod (3) is sleeved with a bearing gland (22) at the bottom of third deep groove ball bearing (21), the bottom of bearing gland (22) is fixedly connected with an elastic collar (23) for shaft.

4. A lever jack as claimed in claim 1 wherein: The top of first gear flange box (11) and second gear flange box (12) is fixedly connected with an upper cover plate (14).

5. A lever jack as claimed in claim 1 wherein: The outer surface of outer telescopic tube (7) is fixedly connected with a locking mounting plate (24) on the right side, the bottom of second screw rod (2) is clamped with a bolt (17).

6. A lever jack as claimed in claim 1 wherein: The first screw nut (1), second screw rod (2), first screw rod (3), second screw nut (5), pinion (9), large gear (10), first gear flange box (11), second gear flange box (12), gear spindle (13), bolt (17) and bearing gland (22) are all made of 45# precision steel pipe heat treatment.

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