CN207361614U - A kind of low clearance hand power truck crane - Google Patents

Abstract

The utility model discloses a low clearance hand-drawn trolley, which comprises a trolley body, two sets of walking drive mechanisms, a lifting drive mechanism and a hook mechanism. The overall structure of the utility model is compact. When the hook is raised to the highest position, the distance between the center of the hook and the bottom of the I-beam is only 450mm, and the maximum lifting height of the cargo becomes larger, which meets the requirements of lifting under the condition of low headroom. For transportation needs, the main engine of the chain hoist at either end of the driving body can lift the goods, and at the same time, the lifting speed is faster, and the two sets of walking drive mechanisms are evenly distributed, and the driven gear is driven by meshing with the rack at the bottom of the I-beam. Driving and walking, the walking stability is good, and the operation safety is high.

Description

A low-headroom hand-drawn trolley

technical field

The utility model relates to the field of hoisting equipment, in particular to a hand-drawn trolley with low headroom.

Background technique

The structure of the existing hand-pulled crane for lifting and transportation is not compact, and the overall vertical height is long, which affects the lifting height of the goods. It cannot meet the lifting requirements of the goods in low buildings or working conditions with small clearance limits. , and the walking stability of the transported goods is poor. When there is shaking in the external environment (such as the cabin, etc.), it is easy to cause the walking trolley to deflect and fall, and the operation safety is poor.

Utility model content

The purpose of the utility model is to provide a low-clearance hand-drawn trolley to solve the problems that the existing hand-drawn trolley for lifting and transportation cannot meet the needs of lifting and transporting goods in low-clearance places and has poor walking stability and potential safety hazards.

In order to achieve the above purpose, the technical solution of the present utility model is that the low headroom hand-drawn trolley includes:

a driving body, the driving body is slidably installed on the lower flange of the I-beam suspended in the air;

Two sets of walking driving mechanisms, the two sets of walking driving mechanisms are diagonally arranged on both sides of the vehicle body, each set of walking driving mechanisms includes a walking driving hand chain wheel, a reducer, a driven gear and a rack, and the walking driving hand chain wheel is installed On the outside of the vehicle body, the gear shaft of the driving hand chain wheel is connected to the input shaft of the reducer, and the output shaft of the reducer is connected to the gear shaft of the driven gear. The driven gear is driven by meshing with the rack installed at the bottom of the I-beam. The driving body walks along the I-beam;

Lifting driving mechanism, the lifting driving mechanism includes the first chain hoist main engine and the second chain hoist main engine respectively suspended at the two ends of the bottom of the driving body, installed on the driving body and located at the first chain hoist main engine The fixed sprocket group between the main chain hoist and the second chain hoist, the movable chain wheel suspended under the fixed chain wheel and the lifting chain, the lifting chain connected to the first chain hoist main body is wound through the fixed sprocket The group and the movable sprocket group are wound and connected to the second hand chain hoist host;

A hook mechanism, the upper part of the hook mechanism is integrally installed with the movable sprocket group.

Preferably, the vehicle body includes two oppositely arranged wall panels and two sets of wheel sets mounted on the inner sides of the two sets of wall panels, and each set of wheel sets includes two wheels running side by side on both sides of the lower flange of the I-beam. Four driven wheels.

Preferably, the walking drive hand chain wheel is installed on the outer end of the wallboard, the reducer is located on one side of the walking drive hand chain wheel, one end of the gear shaft of the driven gear passes through the wallboard to connect to the output shaft of the reducer, and the gear of the driven gear The other end of the shaft is connected to another wall plate with a bearing.

Preferably, the hook mechanism includes a hook beam and a hook, the movable sprocket set is installed inside the hook beam, and the hook is connected below the middle of the hook beam.

Preferably, the set of fixed sprockets includes first to eighth fixed sprockets, the first fixed sprocket and the second fixed sprocket are respectively arranged on one side of the first chain hoist host and the second chain hoist host and connected At the bottom of the vehicle body, the third to eighth fixed sprockets are arranged side by side on the lower part of the vehicle body.

Preferably, the movable sprocket set includes first to fourth movable sprockets, and the first to fourth movable sprockets are suspended directly below the third to sixth fixed sprockets through lifting chains.

Preferably, one end of the lifting chain meshes with the lifting sprocket in the first chain hoist host, and the other end of the lifting chain bypasses the first fixed sprocket, the third fixed sprocket, the first movable sprocket, The fourth fixed sprocket, the second movable sprocket, the fifth fixed sprocket, the sixth fixed sprocket, the third movable sprocket, the seventh fixed sprocket, the fourth movable sprocket, the eighth fixed sprocket and the second After the sprocket is fixed, it meshes with the hoisting sprocket in the second hand chain hoist host.

Preferably, a walking driving hand chain is engaged with the walking driving hand chain wheel.

Preferably, the first chain hoist host and the second chain hoist host are provided with lifting drive bracelets, and the lifting drive bracelets of the first chain hoist host and the second chain hoist host are respectively connected to the first chain hoist host The hand chain wheel in the first chain hoist host and the second chain hoist host engages.

Preferably, the tread surface of the driven wheel is an arc surface.

The utility model has the following advantages: 1. The two ends of the low clearance hand-drawn trolley provided by the utility model are each equipped with a chain hoist host, and the hoisting hook of the chain hoist does not directly lift the goods vertically downwards but is connected with the trolley. The eight fixed sprockets on the car body form a fixed pulley, and the combination of the lifting hook and four movable sprockets is designed to form a hook block structure. The hook can be directly lifted to the bottom of the driving car body, which reduces the headroom height, and any A hand chain hoist can lift goods, and the lifting speed is faster when used at the same time; 2. Simultaneously drive two sets of walking drive mechanisms to realize the trolley walking. The two sets of walking drive mechanisms are evenly distributed. The rack meshes to drive the driving and locks the driving body on the I-beam. Even if it is used in a bumpy and shaking situation in the cabin, it will not move sideways. The structure design is reasonable, the walking stability is good, and the operation safety is high.

Description of drawings

Fig. 1 is a schematic structural diagram of a low headroom hand-drawn trolley according to Embodiment 1 of the present invention.

Fig. 2 is a side partial sectional view of a low headroom hand-drawn trolley according to Embodiment 1 of the utility model.

Fig. 3 is a schematic diagram of the working state of a low headroom hand-drawn trolley according to Embodiment 1 of the present invention.

Fig. 4 is a cross-sectional view of the main engine of the chain hoist according to Embodiment 1 of the present invention.

Detailed ways

The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

Example 1

As shown in Figures 1 and 2 , a low headroom hand-pulled crane provided in Embodiment 1 includes a crane body 1 , two sets of traveling drive mechanisms 2 , a lifting drive mechanism 3 and a hook mechanism 4 .

The driving body 1 is slidably installed on the lower flange of the I-beam 5 suspended in the air, and the driving body 1 includes two opposite wall panels 11 and two sets of wheels mounted on the inner sides of the two wall panels 11. Every group of wheel groups all comprises four driven wheels 12 walking side by side on both sides of the lower flange of the I-beam 5 , and the tread of the driven wheels 12 is an arc surface to adapt to various I-beam running tracks.

Two groups of walking driving mechanisms 2 are diagonally arranged on both sides of the vehicle body 1, each group of walking driving mechanisms 2 includes a walking driving hand chain wheel 21, a reducer 22, a driven gear 23 and a rack 24, and the walking driving hand chain wheel 21 is installed At the outer end of the wallboard 11, the speed reducer 22 is located on one side of the walking driving hand chain wheel 21, the gear shaft of the walking driving hand chain wheel 21 is connected to the input shaft of the speed reducing machine 22, and one end of the gear shaft 26 of the driven gear 23 passes through the wall board 11 Connect the output shaft of the reducer 22, the other end of the gear shaft 26 of the driven gear 23 is connected to another wallboard 11 through a bearing, and the driven gear 23 drives the driving vehicle by meshing with the rack 24 installed at the bottom of the I-beam 5 The body 1 walks along the I-beam 5 .

The lifting drive mechanism 3 includes a first chain hoist main engine 31 and a second chain hoist main engine 38 respectively suspended on the two ends of the bottom of the driving body 1, installed on the driving body 1 and located between the first chain hoist main engine 31 and the second chain hoist main engine 38. The fixed sprocket group 32 between the second hand chain hoist host 38, the movable sprocket group 33 and the lifting chain 34 suspended below the fixed sprocket group 32, the fixed sprocket group 32 includes the first to eighth fixed chains wheels, the first fixed sprocket 321 and the second fixed sprocket 322 are respectively arranged on the side of the first chain hoist host 31 and the second chain hoist host 38 and connected to the bottom of the driving body 1, and the third to eighth fixed The sprockets are installed side by side on the lower part of the vehicle body 1, and the movable sprocket group 33 includes the first to the fourth movable sprockets, and the first to the fourth movable sprockets are suspended on the third to the eighth fixed sprockets by the hoisting chain 34. 3 and 4, one end of the lifting chain 34 meshes with the lifting sprocket 36 in the first hand chain hoist host 31, and the other end of the lifting chain 34 bypasses the first fixed sprocket 321, the third Fixed sprocket 323, first movable sprocket 331, fourth fixed sprocket 324, second movable sprocket 332, fifth fixed sprocket 325, sixth fixed sprocket 326, third movable sprocket 333, seventh fixed sprocket After sprocket 327, the 4th movable sprocket 334, the 8th fixed sprocket 328 and the second fixed sprocket 322 are engaged with the lifting sprocket 36 in the second hand chain hoist main frame 38, and the walking drive hand chain wheel 21 is engaged with Walking driving bracelet 25, the first chain hoist main frame 31 and the second chain hoist main frame 38 are all provided with lifting driving bracelet 35, the lifting of the first chain hoist main frame 31 and the second chain hoist main frame 38 The driving hand chain 35 is engaged with the hand chain wheels 37 in the first chain hoist host 31 and the second chain hoist host 38 respectively. The brake that slides down, the hand chain wheel 37 and the hoisting sprocket 36 in the first chain hoist host 31 and the second chain hoist host 38 transmit torque through the friction plates between the two.

The hook mechanism 4 includes a hook crossbeam 41 and a suspension hook 42 , the movable sprocket group 33 is installed inside the hook crossbeam 41 , and the suspension hook 42 is connected below the middle of the hook crossbeam 41 .

The low headroom hand-pulled trolley in this embodiment includes two working processes of walking along the I-beam 5 in the horizontal direction and lifting goods in the vertical direction. The two working processes are respectively:

1. Walking working process: simultaneously pull the walking driving hand chain 25 at both ends of the driving body 1, drive the walking driving hand chain wheel 21 to rotate, pass the input speed of the reducer 22 to the input speed in the reducer 22, decelerate and increase the speed through the reducer 22 Large torque, the output shaft of the reducer 22 outputs the speed and drives the gear shaft 26 of the driven gear 23 and the driven gear 23 to rotate, and the driven gear 23 engages the rack 24 at the bottom of the I-beam 5 to drive the hand-drawn trolley to achieve stable Walking, reversely pulling the walking driving hand chain 25 at two ends of the driving vehicle body 1 can make the hand-pull driving return.

2. Lifting working process: pull the lifting drive bracelet 35 at any end of the vehicle body 1 to rotate the bracelet wheel 37, and the torque is transmitted to the lifting sprocket 36 and the lifting chain 34, and the lifting chain 34 drives the first to the second Eight fixed sprockets and the first to the fourth movable sprockets, the first to the fourth movable sprockets are pulled up under the pulling of the lifting chain 34, and the goods hooked on the hook 42 and the hook 42 are also pulled up, Its lifting state is shown in Figure 3. The brake in the chain hoist host 31 prevents the goods from falling under the action of gravity. The wheel 37 reversely rotates, and the torque is transmitted to the hoisting sprocket 36 to make the hoisting sprocket 36 reversely rotate, the hoisting chain 34 is loosened, the first to fourth movable sprockets descend under the action of gravity, the hook 42 and the suspension The goods hooked on the hook 42 descend.

In the low headroom hand-pulled crane of this embodiment, when the hook is raised to the highest position, the distance between the center of the hook and the bottom of the I-beam is only 450mm. Lifting requirements under working conditions, the maximum lifting load is 20t, the maximum lifting height is 5m-15m, the travel distance can reach 5m-30m, the reduction ratio of the reducer is 1:30, the hand pull at both ends of the driving body The hoist host can lift the goods by pulling any one of them, and at the same time, the lifting speed is faster.

Although the utility model has been described in detail with general description and specific examples above, some modifications or improvements can be made on the basis of the utility model, which will be obvious to those skilled in the art. Therefore, the modifications or improvements made on the basis of not departing from the spirit of the utility model all belong to the protection scope of the utility model.

Claims (10)

1. A low headroom hand-drawn trolley, characterized in that: the low headroom hand-drawn trolley includes: The driving body (1), the driving body (1) is slidably mounted on the lower flange of the I-beam (5) suspended in the air; Two sets of travel drive mechanisms (2), two sets of travel drive mechanisms (2) are diagonally arranged on both sides of the vehicle body (1), each set of travel drive mechanisms (2) includes a travel drive hand chain wheel (21), a reducer (22), driven gear (23) and tooth bar (24), walking drive hand chain wheel (21) is installed on the outside of the vehicle body (1), and the gear shaft of walking drive hand chain wheel (21) is connected to reducer (22) The input shaft of the reducer (22) is connected to the gear shaft (26) of the driven gear (23), and the driven gear (23) meshes with the rack (24) installed at the bottom of the I-beam (5) The transmission drives the driving body (1) to walk along the I-beam (5); Lifting driving mechanism (3), the lifting driving mechanism (3) includes a first chain hoist main engine (31) and a second chain hoist main engine (38) suspended respectively at both ends of the bottom of the vehicle body (1) , be installed on the driving body (1) and be positioned at the fixed sprocket group (32) between the first chain hoist main frame (31) and the second chain hoist main frame (38), hang on the fixed chain wheel group ( 32) The movable sprocket set (33) and the lifting chain (34) below are wound and connected to the lifting chain (34) of the first chain hoist host (31) via the fixed sprocket set (32) and the movable sprocket The group (33) is wound and connected to the second chain hoist host (38); Hook mechanism (4), the upper part of the hook mechanism (4) is integrally installed with the movable chain wheel group (33). 2. A low headroom hand-drawn trolley according to claim 1, characterized in that: the trolley body (1) comprises two wall panels (11) arranged opposite to each other and installed on two sets of wall panels (11) ) two groups of wheels on the inner side, each group of wheels includes four driven wheels (12) that walk side by side on both sides of the lower flange of the I-beam (5). 3. A low headroom hand-pulled trolley according to claim 1, characterized in that: the travel drive bracelet (21) is installed on the outer end of the wall panel (11), and the reducer (22) is located on the travel drive bracelet On one side of the wheel (21), one end of the gear shaft (26) of the driven gear (23) passes through the wallboard (11) to connect the output shaft of the reducer (22), and the other end of the gear shaft (26) of the driven gear (23) One end is connected to the other wall plate (11) by a bearing. 4. A low headroom hand-drawn trolley according to claim 1, characterized in that: the hook mechanism (4) includes a hook beam (41) and a hook (42), and the movable sprocket set (33) Be installed in suspension hook crossbeam (41) inside, suspension hook (42) is connected below the middle of suspension hook crossbeam (41). 5. The hand-drawn trolley with low headroom according to claim 1, characterized in that: the fixed sprocket set (32) includes first to eighth fixed sprockets, the first fixed sprocket (321) and the second fixed sprocket The two fixed sprockets (322) are respectively arranged on one side of the first chain hoist main engine (31) and the second chain hoist main engine (38) and connected to the bottom of the driving body (1), and the third to eighth fixed sprockets They are installed side by side on the lower part of the driving body (1). 6. A low headroom hand-drawn trolley according to claim 1, characterized in that: the movable sprocket set (33) includes first to fourth movable sprockets, and the first to fourth movable sprockets pass through Heavy chain (34) is suspended directly below the 3rd to the 8th fixed sprocket. 7. The hand-pulled trolley with low headroom according to claim 6, characterized in that: one end of the lifting chain (34) meshes with the lifting sprocket (36) in the first chain hoist main unit (31) , the other end of the lifting chain (34) goes around the first fixed sprocket (321), the third fixed sprocket (323), the first movable sprocket (331), the fourth fixed sprocket (324), the second Active sprocket (332), the fifth fixed sprocket (325), the sixth fixed sprocket (326), the third movable sprocket (333), the seventh fixed sprocket (327), the fourth movable sprocket (334 ), the eighth fixed sprocket (328) and the second fixed sprocket (322) are engaged with the hoisting sprocket (36) in the second chain hoist main frame (38). 8 . The low headroom hand-drawn trolley according to claim 3 , characterized in that: a walking driving hand chain ( 25 ) is engaged with the walking driving hand chain wheel ( 21 ). 9. A low headroom hand-pulled trolley according to claim 7, characterized in that: the first chain hoist host (31) and the second chain hoist host (38) are equipped with lifting drive bracelets bar (35), the hoisting driving hand chain (35) of the first chain hoist host (31) and the second chain hoist host (38) is connected with the first chain hoist host (31) and the second chain hoist respectively The bracelet wheel (37) engagement in the main frame (38). 10. The low headroom hand-pulled trolley according to claim 2, characterized in that: the tread surface of the driven wheel (12) is a circular arc surface.