CN104340912B - Manual hoisting jack - Google Patents

Abstract

The invention discloses a manual lifting chain, which comprises a driving sprocket, a driven sprocket, a driving chain and a lifting chain, an eccentric sleeve is arranged on one side of the driving sprocket, and a There is a needle-tooth sleeve evenly distributed with pin-tooth pins, the eccentric sleeve is inserted into the pin-tooth sleeve, and an external gear sleeve is provided on the side of the driven sprocket. Bite, the number of teeth of the outer tooth sleeve is one less than the number of pin tooth pins, the sum of the diameter of the outer tooth sleeve and the eccentric distance of the eccentric sleeve twice is equal to the diameter of the pitch circle of the pin tooth pin, between the driving sprocket and the driven There is a connecting bush in the center hole of the sprocket, and a mounting plate is provided at both ends of the connecting bush. The upper ends of the two mounting plates are connected to each other through the mounting sleeve. Set outside. The advantages are: simple and compact structure, convenient use and installation, low production cost, small size, light weight, no idle travel in the active chain, labor and time saving, and reduce the labor intensity of operators.

Description

Manual lifting chain

technical field

The invention relates to a hoisting machine, in particular to a manual hoisting back chain.

Background technique

"Inverted chain", also known as "chain hoist", is a manual lifting tool that is easy to use and easy to carry. , Warehouse and other installation operations are more important for open-air and non-electric operations.

Commonly used upside-down chains at present are made up of housing, the gear group that is located in the housing, friction pair and ratchet anti-falling self-locking device. This type of inverted chain has a complex structure, high manufacturing cost, and inconvenient use and installation. Especially after the first hoisting, it is necessary to reverse the empty travel of the endless chain on the driving sprocket to perform the second hoisting, which is labor-intensive and time-consuming, and increases the labor force of the workers. Labor intensity.

Contents of the invention

The technical problem to be solved by the present invention is to provide a manual lifting and rewinding chain with simple and compact structure, convenient use and installation, no idle travel, labor and time saving, self-locking function, and low manufacturing cost.

In order to solve the above problems, the present invention adopts the following technical solutions:

A manual lifting chain, including a driving sprocket and a driven sprocket, ring-shaped chain grooves are respectively arranged on the driving sprocket and driven sprocket, and a driving chain and a lifting chain are respectively arranged in the ring-shaped chain grooves , an eccentric sleeve is provided on one side of the driving sprocket, a pin tooth sleeve is provided between the driving sprocket and the driven sprocket, and a circle of pin tooth pins are evenly distributed in the pin tooth sleeve, and the eccentric sleeve is inserted into the pin In the center hole of the gear sleeve, there is an outer gear sleeve on the side of the driven sprocket. The outer gear sleeve is inserted into the pin tooth sleeve and engages with some pin teeth. The number of teeth of the outer gear sleeve is smaller than that of the pin tooth pin The number is less than one, the sum of the diameter of the outer gear sleeve and the eccentricity of twice the eccentric sleeve is equal to the diameter of the pitch circle where the pin tooth pins are evenly distributed, and a connecting shaft is arranged in the center hole of the driving sprocket and the driven sprocket There are two sets of mounting plates on both ends of the connecting shaft sleeve. The upper ends of the two mounting plates are connected to each other through a mounting sleeve. The slot snaps onto the outside of the mounting sleeve.

Preferably, the width of the U-shaped groove is equal to the sum of the diameter of the mounting sleeve and twice the eccentricity of the eccentric sleeve.

Preferably, needle bearings A are respectively provided between the central holes of the driving sprocket and the driven sprocket and between the connecting bushes.

Preferably, a needle bearing B is provided between the eccentric sleeve and the central hole of the needle gear sleeve.

Preferably, a sealing ring is provided between the driven sprocket and the end surface of the pin tooth sleeve.

Preferably, an annular groove is processed on the needle-tooth sleeve, and the needle-tooth pin is fixed at the large-diameter inner wall of the annular groove.

Preferably, positioning bolts are respectively connected to the two ends of the connecting sleeve, so as to realize the positioning of the two mounting plates.

Preferably, fixing bolts are respectively connected to both ends of the installation sleeve, and the upper ends of the two installation plates are respectively fitted on the installation sleeve and limited by the fixing bolts.

The beneficial effects of the present invention are:

1. Since the chain link is only composed of several parts, and there are few parts for relative rotation, the structure is simple and compact, easy to use and install, low in manufacturing cost, small in size and light in weight.

2. After the driving sprocket rotates, the eccentric sleeve can drive the pin-tooth sleeve to perform sieve swing motion in situ, and then drive the driven sprocket to rotate at a differential speed through the pin-tooth pin. Therefore, the driving chain has no empty travel, which solves the problem of traditional reverse rotation. The chain must reverse the idle travel of the active chain to carry out the second lifting problem, which saves labor and time, and reduces the labor intensity of the operators.

3. Since the hoisting function of chain rewinding is realized by using the principle of cycloid differential transmission, the chain rewinding structure has a self-locking function, and there is no need to set up a ratchet anti-falling self-locking device, which further simplifies the structure. Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a cross-sectional view along line A-A of Fig. 1 .

Fig. 3 is a B-B sectional view of Fig. 3 .

In the figure: driven sprocket 1, circular chain groove 101, outer gear sleeve 2, mounting sleeve 3, pin gear sleeve 4, annular groove 401, boss 402, U-shaped groove 403, fixing bolt 5, mounting plate 6 , Needle roller bearing B7, drive sprocket 8, ring chain groove 801, needle roller bearing A9, positioning bolt 10, connecting bushing 11, eccentric sleeve 12, ring pin tooth pin 13, driving chain 14, sealing ring 15, lifting Chain 16.

detailed description

As shown in Figures 1-3, a manual lifting chain involved in the present invention includes a driving sprocket 8 and a driven sprocket 1, and annular rings are respectively arranged on the driving sprocket 8 and the driven sprocket 1. The chain grooves 801 and 101 are respectively provided with an annular closed driving chain 14 and a lifting chain 16 in the annular chain grooves 801 and 101 of the driving sprocket 8 and the driven sprocket 1 . An eccentric sleeve 12 is arranged on the side of the driving sprocket 8 corresponding to the driven sprocket 1, and the eccentric sleeve 12 and the driving sprocket 8 are integrally structured, and a pin tooth is arranged between the driving sprocket 8 and the driven sprocket 1. The sleeve 4, the eccentric sleeve 12 is inserted into the central hole of the pin tooth sleeve 4, and a needle bearing B7 is installed between the eccentric sleeve 12 and the central hole of the pin gear sleeve 4.

An annular groove 401 is processed on the needle-tooth sleeve 4, and a ring of needle-tooth pins 13 are evenly distributed and fixed on the large-diameter inner wall of the annular groove 401. As a preference, the needle-tooth pin 13 of this embodiment is 40 as an example. Half of the circumference of the pin-tooth pin 13 protrudes from the large-diameter inner wall of the annular groove 401 . A trapezoidal boss 402 is arranged on the outer wall of the needle tooth sleeve 4 , and a U-shaped groove 403 is processed in the middle of the boss 402 .

On the side of the driven sprocket 1 corresponding to the driving sprocket 8, an external gear sleeve 2 is provided. The external gear sleeve 2 is integrated with the driven sprocket 1. The external gear sleeve 2 is inserted into the annular groove of the needle gear sleeve 4. 401 and engages with part of the pin-tooth pin 13, the number of teeth of the outer gear sleeve 2 is one less than the number of pin-tooth pins 13, and the sum of the diameter of the outer gear sleeve 2 and the eccentricity of the eccentric sleeve 12 is equal to the needle teeth The pitch circle diameters of the pins 13 are evenly distributed to ensure that the relative movement between the outer gear sleeve 2 and the pin gear sleeve 4 of the driven sprocket 1 can be realized, that is, the driven sprocket 1 is driven by the sieve movement of the pin gear sleeve 4 Differential rotation.

A connecting sleeve 11 is inserted in the central hole of the driving sprocket 8 and the driven sprocket 1, and a set of needle rollers are respectively installed between the connecting sleeve 11 and the central holes of the driving sprocket 8 and the driven sprocket 1. Bearing A9. Mounting plates 6 are sleeved at both ends of the connecting shaft sleeve 11, and the driving sprocket 8 and the driven sprocket 1 are clamped between the two mounting plates 6, and threaded in the central holes at both ends of the connecting shaft sleeve 11. Positioning bolts 10 are connected to realize the positioning of the two mounting plates 6 .

The upper ends of the two mounting plates 6 are connected to each other through a mounting sleeve 3, and fixing bolts 5 are respectively threaded in the center holes at both ends of the mounting sleeve 3, and the upper ends of the two mounting plates 6 are respectively sleeved on the mounting sleeves. 3 and limit by fixing bolt 5. The pin tooth sleeve 4 is stuck outside the installation sleeve 3 through the U-shaped groove 403 on the boss 402, and the width of the U-shaped groove 403 is equal to the diameter of the installation sleeve 3 and the eccentricity of the eccentric sleeve 12 twice Sum.

Preferably, a sealing ring 15 is provided between the driven sprocket 1 and the end surface of the pin tooth sleeve 4 so as to realize the lubrication and sealing between the teeth of the external gear sleeve 2 and the pin tooth pin 13 .

When in use, the manual lifting chain is suspended on the chain support through the installation sleeve 3, the driving chain 14 on the driving sprocket 8 is pulled, the driving driving sprocket 8 is driven to rotate, and the eccentric sleeve on the driving sprocket 8 is driven 12 performs eccentric rotation, and the rotation of the eccentric sleeve 12 drives the pintooth sleeve 4 to move. Since the upper end of the pintooth sleeve 4 is stuck outside the installation sleeve 3, the pintooth sleeve 4 can realize the sieve swing movement in situ, and through the pintooth pin 13 Partial engagement with the outer gear sleeve 2 drives the driven sprocket 1 to rotate at a differential speed, thereby driving the lifting chain 16 to rotate in a circular manner to realize lifting of heavy objects. Manually drive driving sprocket 8 every revolution, and pin gear sleeve 4 drives driven sprocket 1 to turn a tooth, so lifting is stable.

Although the embodiment of the present invention has been disclosed as above, it is not limited to the use listed in the specification and implementation, it can be applied to various fields suitable for the present invention, and it can be easily understood by those skilled in the art Therefore, the invention is not limited to the specific details and examples shown and described herein without departing from the general concept defined by the claims and their equivalents.

Claims (7)

1. a Manual hoisting jack, including drive sprocket and driven sprocket, at drive sprocket and driven chain It is respectively equipped with annular key way on wheel, and be respectively equipped with drive chain and hoisting-chain in annular key way, its feature It is: be provided with an eccentric bushing in drive sprocket side, between drive sprocket and driven sprocket, be provided with one Pin gear sleeve, is evenly equipped with a circle gear pin in pin gear sleeve, and described eccentric bushing inserts in the centre bore of pin gear sleeve, Be provided with an external tooth cover in driven sprocket side, in described external tooth cover inserts pin gear sleeve and with part gear pin Occlusion, fewer than the quantity of gear pin one of the teeth quantity of external tooth cover, the diameter of external tooth cover and two times inclined Heart set eccentric throw sum is equal to the uniform reference diameter of gear pin, in drive sprocket and driven sprocket It is provided with a connecting bushing in heart hole, be arranged with installing plate, two installing plates at connecting bushing two ends respectively Upper end by one install set be connected with each other, be provided with a boss at pin gear sleeve outer wall, described boss lead to Cross the U-shaped groove in the middle part of it to be stuck in outside installation set；The width of described U-shaped groove is equal to install the straight of set The eccentric bushing eccentric throw sum with two times for the footpath.

2. Manual hoisting jack according to claim 1, is characterized in that: at drive sprocket and driven It in the centre bore of sprocket wheel and is respectively equipped with needle bearing A between connecting bushing.

3. Manual hoisting jack according to claim 2, is characterized in that: at eccentric bushing and pin gear sleeve Centre bore between be provided with needle bearing B.

4. Manual hoisting jack according to claim 1, is characterized in that: at driven sprocket and pin tooth It is provided with sealing ring between the end face of set.

5. Manual hoisting jack according to claim 1, is characterized in that: be machined with on pin gear sleeve One annular groove, described gear pin is fixed at the big footpath inwall of annular groove.

6. Manual hoisting jack according to claim 1, is characterized in that: described connecting bushing two ends It is connected to bolt, to realize the positioning to two installing plates.

7. Manual hoisting jack according to claim 1, is characterized in that: divide at the two ends installing set Not being connected with fixing bolt, the upper end of described two installing plates is set in installation and puts and pass through to fix Bolt is spacing.