CN210795631U - A workpiece hoist - Google Patents

Abstract

The utility model belongs to the technical field of mechanical equipment and specifically relates to a lifting machine for work piece is related to. The utility model provides a lifting machine for work piece, which comprises a frame, sliding connection has the hoisting frame in the frame, the upper end of frame is rotated and is connected with the pivot, the lower extreme of frame is rotated and is connected with down the pivot, the both ends of going up the pivot all are connected with the sprocket, the both ends of pivot correspond the cochain wheel down and are connected with down the sprocket, be connected through the promotion chain that is used for driving the hoisting frame and reciprocates between cochain wheel and the lower sprocket, two promotion chains correspond the both ends of connecting at the hoisting frame respectively, be provided with in the frame and be used for driving pivot pivoted actuating mechanism down, be provided with. The utility model discloses a hoisting frame is difficult for falling, and the security is high during the use.

Description

A workpiece hoist

technical field

The utility model relates to the field of mechanical equipment, in particular to a hoist for workpieces.

Background technique

In the automatic production line, it is often necessary to transport the workpiece through belts or drive rollers between the equipment and the equipment. With the expansion of the production line, the transport of the workpiece often uses a lifting mechanism. The general structure of the lifting mechanism is: the lifting mechanism consists of a motor, It consists of sprocket, chain, frame and lifting frame. The lifting frame that lifts up and down is installed in the frame, and the upper edge and the lower edge of one end face of the lifting frame are respectively fixed with one end of the chain. The chain is driven by the motor-driven sprocket. The lifting frame can be lifted or lowered down to realize the transportation of the workpiece.

However, the safety of the existing hoisting mechanism is not high, and after a long time of use, the chain is prone to break or the connection between the chain and the hoisting frame is detached, thereby causing the hoisting frame to fall.

For example, China Patent Bulletin No.: CN201358080, a lifting mechanism with counterweights announced on December 9, 2009, is composed of a motor, an upper sprocket, a lower sprocket, a chain, a frame, and a moving trolley. The lifting mobile trolley is installed in the frame, the upper edge and the lower edge of one end face of the mobile trolley are respectively fixed with one end of the chain, and the chain is driven by the lower sprocket driven by the motor to lift or lower the mobile trolley. A counterweight block is installed on the other side chain symmetrical to the one side chain connected to the mobile trolley, and the vertical height of the lower surface of the counterweight block and the lower sprocket is not less than the lift of the mobile trolley. Although the utility model has the advantages of simple structure, low cost and easy operation, the lifting of the workpiece can be completed by using a low-power motor, and energy is saved. It is a lifting mechanism that meets the requirements of energy saving, but it is prone to chain breakage after a long time of use. Or the connection between the chain and the moving trolley is disengaged, resulting in the falling of the moving trolley.

SUMMARY OF THE INVENTION

The utility model mainly aims at the problem that the safety of the existing lifting mechanism is not high, and after a long time of use, the chain is prone to breakage or the connection between the chain and the lifting frame is detached, thereby causing the lifting frame to fall. The lifting frame on the workpiece is not easy to fall, and the safety is high during use.

The purpose of the utility model is mainly achieved through the following scheme: a hoist for workpieces, including a frame, the frame is slidably connected with a lifting frame, and the upper end of the frame is rotatably connected with an upper shaft , the lower end of the frame is rotatably connected with a lower rotating shaft, both ends of the upper rotating shaft are connected with an upper sprocket, and both ends of the lower rotating shaft are connected with a lower sprocket corresponding to the upper sprocket. The upper chain wheel and the lower chain wheel are connected by a lifting chain used to drive the lifting frame to move up and down, and the two lifting chains are respectively connected to the two ends of the lifting frame. A driving mechanism, the lifting frame is provided with a safety device, and the safety device includes a safety shell with a sliding cavity, and both ends of the safety shell are provided with rope outlet holes, and the sliding cavity A connecting shaft is provided, both ends of the connecting shaft are provided with buffer blocks, the buffer blocks are provided with safety ropes, and the safety ropes are respectively connected to the corresponding hoisting chains after passing through the rope outlet holes, The safety device is arranged at the center of the interval between the two hoisting chains. The frame is slidably connected with a lifting frame, the upper end of the frame is rotatably connected with an upper shaft, the lower end of the frame is rotatably connected with a lower shaft, both ends of the upper shaft are connected with an upper sprocket, and both ends of the lower shaft correspond to the upper sprocket The lower sprocket is connected, and the upper sprocket and the lower sprocket are connected by a lifting chain used to drive the lifting frame to move up and down. The frame is provided with a driving mechanism for driving the rotation of the lower rotating shaft. Rotation, the lower shaft can drive the lower sprockets at both ends to rotate at the same time. When the lower sprocket rotates, it can drive the lifting chain to move, thereby driving the lifting frame to move up and down through the lifting chain. The two lifting chains are respectively connected to the two ends of the lifting frame. , so that the lifting frame has higher stability when it moves up and down, and can transport the workpiece more stably. The lifting frame is provided with a safety device. The safety device includes a safety shell with a sliding cavity. Both ends of the safety shell are provided with The rope exit hole, the sliding cavity is provided with a connecting shaft, the two ends of the connecting shaft are provided with buffer blocks, the buffer blocks are provided with safety ropes, and the safety ropes are connected to the corresponding hoisting chains after passing through the rope exit holes. Connected to the hoisting chain near the hoisting frame, after the hoist has been used for a long time, the hoisting chain may break or the connection between the hoisting chain and the hoisting frame may be disconnected. The frame loses the support on one side, causing the lifting frame to deflect. At this time, since the safety casing is connected to the lifting frame, and one of the safety ropes in the safety casing is connected to the intact chain, the safety rope is connected to the intact chain. Under the action of the chain, the stability of the lifting frame can be ensured as much as possible, and it is convenient for the staff to find the damage and maintain it in time. A safety rope is connected, so that the lifting frame can remain as stable as possible and has strong practicality.

Preferably, the driving mechanism includes a hoisting motor, the output shaft of the hoisting motor is connected with a driving sprocket, the lower rotating shaft is provided with a driven sprocket, and the driving sprocket is connected to the driven chain The wheels are connected by a transmission chain. The driving mechanism includes a hoisting motor, the output shaft of the hoisting motor is connected with a driving sprocket, and the lower rotating shaft is provided with a driven sprocket. The driving sprocket and the driven sprocket are connected by a transmission chain. The driving chain wheel rotates, and the driving chain wheel can drive the driven chain wheel to rotate through the transmission chain, thereby driving the lower shaft to rotate through the driven chain wheel.

Preferably, the hoisting motor is connected with the driving sprocket through a reducer. The hoisting motor is connected with the drive sprocket through the reducer, which makes the drive sprocket more stable when it rotates.

Preferably, both ends of the sliding cavity are provided with a circular truncated clamping cavity corresponding to the buffer block. The cross-sectional area of the clamping cavity gradually decreases in the direction away from the buffer block. Corresponding to the circular truncated shape, a positioning block is arranged at the rope outlet hole, and a buffer spring is connected between the positioning block and the buffer block. Both ends of the sliding cavity are provided with a circular truncated clamping cavity corresponding to the buffer block. The cross-sectional area of the clamping cavity gradually decreases in the direction away from the buffer block, and the buffer block is also in the corresponding circular truncated shape. A buffer spring is connected between the positioning block and the buffer block. The buffer spring is designed so that when the safety rope works, the safety rope will first drive the connected buffer block to overcome the elastic force of the buffer spring and then move, and the buffer spring can buffer part of the impact force. , which can prevent the damage of the safety device caused by the sudden movement of the safety rope. The setting of the circular truncated card cavity can make the buffer block stuck on the card cavity when it slides for a certain distance in the card cavity, preventing the buffer block from pressing on the buffer spring. As a result, the buffer spring is damaged, and the positioning block is used to install the buffer spring.

Preferably, the lifting frame is provided with a conveyor belt mechanism. A conveyor belt mechanism is arranged on the lifting frame, and the conveyor belt mechanism is an existing technology, which can facilitate the conveying of workpieces, save time and labor, and reduce manual operations.

Preferably, both ends of the conveyor belt mechanism are connected with clamping jaws for clamping the workpiece through a cylinder. Both ends of the conveyor belt mechanism are connected with clamping jaws for clamping the workpiece through the air cylinder. The cylinder can drive the clamping jaws to move to clamp the workpiece, ensuring the stability of the workpiece during lifting and conveying, convenient operation and strong practicability.

Preferably, the safety housing is fixed on the lifting frame by fastening bolts. The safety shell is fixed on the lifting frame by tightening bolts, the connection is stable, and the installation and disassembly are convenient.

Therefore, the hoist for a workpiece of the present invention has the following advantages: the utility model has a simple structure, is convenient to install, makes the hoisting frame not easy to fall through the design of the safety device, has high safety in use, and ensures that the workpiece is transported during transportation. Stable and practical.

Description of drawings

1 is a schematic structural diagram of an angle of the present invention.

Figure 2 is a schematic structural diagram of another angle of the present invention.

FIG. 3 is an enlarged view of A in FIG. 2 .

4 is a schematic structural diagram of the safety device in the present invention.

Description: 1-frame, 2-lifting frame, 3-air cylinder, 4-claw, 5-conveyor belt mechanism, 6-drive mechanism, 7-base plate, 8-lower shaft, 9-transmission chain, 10- Driving sprocket, 11-reducer, 12-lifting motor, 13-safety device, 14-safety rope, 15-lifting chain, 16-upper shaft, 17-upper sprocket, 18-driven sprocket, 19-lower Sprocket, 20-buffer spring, 21-safety shell, 22-connecting shaft, 23-sliding cavity, 24-card cavity, 25-positioning block, 26-rope hole, 27-buffer block, 28-fastening bolt .

Detailed ways

The technical solutions of the present utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

Example 1:

As shown in Figures 1, 2, 3, and 4, a hoist for workpieces includes a frame 1, a hoist frame 2 is slidably connected to the frame 1, an upper shaft 16 is rotatably connected to the upper end of the frame 1, and the frame 1 The lower end of the shaft 8 is rotatably connected to the lower shaft 8, both ends of the upper shaft 16 are connected to the upper sprocket 17, the two ends of the lower shaft 8 are connected to the lower chain wheel 19 corresponding to the upper chain wheel 17, the upper chain wheel 17 and the lower chain wheel 19 They are connected by a lifting chain 15 for driving the lifting frame 2 to move up and down. The frame 1 is provided with a driving mechanism 6 for driving the lower rotating shaft 8 to rotate. When the driving mechanism 6 is activated, it can drive the lower rotating shaft 8 to rotate. The lower sprockets 19 at both ends are driven to rotate at the same time. When the lower sprocket 19 rotates, it can drive the lifting chain 15 to move, thereby driving the lifting frame 2 to move up and down through the lifting chain 15. The two lifting chains 15 are respectively connected to the lifting frame 2. The two ends make the lifting frame 2 have higher stability when moving up and down, and can transport the workpiece more stably. The lifting frame 2 is provided with a safety device 13. The safety device 13 includes a safety shell 21 with a sliding cavity 23. Both ends of the housing 21 are provided with rope outlet holes 26 , the sliding cavity 23 is provided with a connecting shaft 22 , both ends of the connecting shaft 22 are provided with buffer blocks 27 , and the buffer blocks 27 are provided with safety ropes 14 , and safety ropes 14 After passing through the rope outlet hole 26, they are respectively connected to the corresponding hoisting chain 15, and the safety rope 14 is connected to the hoisting chain 15 near the hoisting frame 2. After the hoist is used for a long time, the hoisting chain 15 may break or lift There are two situations in which the connection between the chain 15 and the lifting frame 2 is disengaged. When the lifting chain 15 breaks, the lifting frame 2 is deflected because the lifting frame 2 loses one side of the support. At this time, the safety shell 21 is connected On the hoisting frame 2, one of the safety ropes 14 in the safety housing 21 is connected to the intact chain, so under the action of the safety rope 14 and the intact chain, the stability of the hoisting frame 2 can be guaranteed as much as possible , it is convenient for the staff to find the damage and maintain it in time. When the connection between the lifting chain 15 and the lifting frame 2 is separated, because the lifting chain 15 separated from the lifting frame 2 is connected with one of the safety ropes 14, the lifting frame 2 is connected. It can be kept as stable as possible and has strong practicability. The safety device 13 is arranged at the center of the interval between the two hoisting chains 15, thereby ensuring good stability no matter which hoisting chain 15 fails; the safety shell 21 It is fixed on the lifting frame 2 by the fastening bolts 28, the connection is stable, and the installation and disassembly are convenient.

The driving mechanism 6 includes a hoisting motor 12, the output shaft of the hoisting motor 12 is connected with the driving sprocket 10, and the hoisting motor 12 is connected with the driving sprocket 10 through the reducer 11, so that the driving stability of the driving sprocket 10 is higher when it rotates, and the lowering The rotating shaft 8 is provided with a driven sprocket 18, and the driving sprocket 10 and the driven sprocket 18 are connected by a transmission chain 9. When the hoisting motor 12 is started, it can drive the driving sprocket 10 to rotate, and the driving sprocket 10 can pass the transmission The chain 9 drives the driven sprocket 18 to rotate, thereby driving the lower shaft 8 to rotate through the driven sprocket 18 .

Both ends of the sliding cavity 23 are provided with a truncated truncated card cavity 24 corresponding to the buffer block 27 . The cross-sectional area of the card cavities 24 gradually decreases in the direction away from the buffer block 27 , and the buffer block 27 also has a corresponding truncated truncated shape. A positioning block 25 is provided at the rope hole 26, and a buffer spring 20 is connected between the positioning block 25 and the buffer block 27. The buffer spring 20 is designed so that when the safety rope 14 works, the safety rope 14 will first drive the connected buffer block 27. After overcoming the elastic force of the buffer spring 20, the buffer spring 20 can buffer a part of the impact force, thereby preventing the safety device 13 from being damaged due to the sudden movement of the safety rope 14. 24 slides for a certain distance, it will be stuck on the card cavity 24 to prevent the buffer block 27 from pressing on the buffer spring 20 to cause damage to the buffer spring 20 . The positioning block 25 is provided for installing the buffer spring 20 .

A conveyor belt mechanism 5 is provided on the lifting frame 2, and the conveyor belt mechanism 5 is an existing technology, which can facilitate the transportation of workpieces, save time and labor, and reduce manual operations; both ends of the conveyor belt mechanism 5 are connected by the cylinder 3. The clamping jaw 4 holding the workpiece can drive the clamping jaw 4 to move through the cylinder 3 to clamp the workpiece, ensuring the stability of the workpiece during lifting and conveying, convenient operation and strong practicability; the cylinder 3 is a double-rod cylinder 3, which improves the clamping jaw. 4. Stability when clamping the workpiece.

The bottom end of the frame 1 is provided with a bottom plate 7 for supporting the lifting frame 2. When the lifting frame 2 moves to the bottom, it will abut on the bottom plate 7, thereby reducing the force of the lifting chain 15 and increasing the stability of workpiece handling. .

When the upper and lower surfaces of the hoisting frame 2 are respectively connected with both ends of the hoisting chain 15 , safety devices 13 can be installed on the upper and lower sides of the hoisting frame 2 respectively, thereby improving the safety of the hoisting frame 2 during operation.

It should be understood that this embodiment is only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

Claims (7)

1. A lifting machine for workpieces comprises a frame, wherein the frame is connected with a lifting frame in a sliding manner, and is characterized in that the upper end of the frame is rotatably connected with an upper rotating shaft, the lower end of the frame is rotatably connected with a lower rotating shaft, both ends of the upper rotating shaft are connected with upper chain wheels, both ends of the lower rotating shaft are connected with lower chain wheels corresponding to upper chain wheels, the upper chain wheels are connected with the lower chain wheels through lifting chains for driving the lifting frame to move up and down, the two lifting chains are respectively and correspondingly connected with both ends of the lifting frame, the frame is provided with a driving mechanism for driving the lower rotating shaft to rotate, the lifting frame is provided with a safety device, the safety device comprises a safety shell with a sliding cavity, both ends of the safety shell are provided with rope outlet holes, the sliding cavity is internally provided with a connecting shaft, both ends of the connecting shaft are provided with buffer blocks, the buffer block is provided with a safety rope which passes through the rope outlet hole and then is respectively connected to the corresponding lifting chains.

2. The lifting machine for the workpieces as claimed in claim 1, wherein the driving mechanism comprises a lifting motor, an output shaft of the lifting motor is connected with a driving sprocket, a driven sprocket is arranged on the lower rotating shaft, and the driving sprocket and the driven sprocket are connected through a transmission chain.

3. The workpiece lifter according to claim 2, wherein the lifting motor is connected to the drive sprocket through a speed reducer.

4. The lifting machine for the workpieces as claimed in claim 1, wherein the two ends of the sliding cavity are provided with clamping cavities corresponding to the buffer blocks, the cross-sectional area of each clamping cavity is gradually reduced towards the direction away from the buffer block, the buffer blocks are also in the shape of the corresponding circular truncated cone, the rope outlet holes are provided with positioning blocks, and buffer springs are connected between the positioning blocks and the buffer blocks.

5. The workpiece lifter according to claim 1, 2, 3 or 4, characterized in that the lifting frame is provided with a conveyor belt mechanism.

6. The lifting machine for the workpieces as claimed in claim 5, wherein clamping jaws for clamping the workpieces are connected to both ends of the conveying belt mechanism through air cylinders.

7. The hoisting machine for the workpiece as set forth in claim 1, 2, 3 or 4, wherein the safety housing is fixed to the hoisting frame by fastening bolts.

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