阅读说明：本技术 一种倍速线大负载头尾升降机 (Double-speed line heavy-load head-tail elevator ) 是由 孟得干 于 2019-12-21 设计创作，主要内容包括：本发明公开了一种倍速线大负载头尾升降机,包括机架,以及安装在机架上的升降总成及输送总成；升降总成包括升降气缸、顶升组件、升降链条、辅助导轨及滑块；升降气缸安装在机架的底板上,辅助导轨对称设置在升降气缸的两侧,滑块固定在辅助滑轨上；顶升组件设置在升降气缸的伸缩端并驱动与顶升组件啮合连接的升降链条,输送总成与述滑块及升降链条固定连接。本发明通过升降气缸动作,带动顶升组件与输送总成沿辅助导轨上下移动,以工件的实现升降功能；输送总成通过减速机驱动端头动力轴以同步驱动两侧的输送链条同步传动,以实现工件的前后平移功能,具有制造容易、安装方便、价格低廉且负载大的优点。(The invention discloses a double-speed line heavy-load head-tail elevator, which comprises a rack, and a lifting assembly and a conveying assembly which are arranged on the rack; the lifting assembly comprises a lifting cylinder, a jacking assembly, a lifting chain, an auxiliary guide rail and a sliding block; the lifting cylinder is arranged on a bottom plate of the frame, the auxiliary guide rails are symmetrically arranged on two sides of the lifting cylinder, and the sliding blocks are fixed on the auxiliary sliding rails; the jacking assembly is arranged at the telescopic end of the lifting cylinder and drives a lifting chain which is meshed with the jacking assembly, and the conveying assembly is fixedly connected with the sliding block and the lifting chain. The lifting cylinder acts to drive the jacking assembly and the conveying assembly to move up and down along the auxiliary guide rail, so that the workpiece is lifted; the conveying assembly drives the end power shaft through the speed reducer to synchronously drive the conveying chains on two sides to realize the function of forward and backward translation of the workpiece, and has the advantages of easy manufacture, convenient installation, low price and large load.)

1. A double-speed line heavy-load head-tail elevator is characterized by comprising a rack (1), and a lifting assembly (2) and a conveying assembly (3) which are arranged on the rack (1);

the lifting assembly (2) comprises a lifting cylinder (4), a jacking component (5), a lifting chain (6), an auxiliary guide rail (7) and a sliding block (8); the lifting cylinder (4) is arranged on a bottom plate (18) of the rack (1), the auxiliary guide rails (7) are symmetrically arranged on two sides of the lifting cylinder (4), and the sliding blocks (8) are fixed on the auxiliary sliding rails (7); the jacking assembly (5) is arranged at the telescopic end of the lifting cylinder (4) and drives a lifting chain (6) in meshed connection with the jacking assembly (5), and the conveying assembly (3) is fixedly connected with the sliding block (8) and the lifting chain (6) so as to drive the jacking assembly (5) and the lifting chain (6) through the jacking assembly (5) and further drive the conveying assembly (3) to realize a lifting function along the auxiliary guide rail (7) under the action of the sliding block (8);

the conveying assembly (3) comprises chain transmission assemblies (3-1) on the left side and the right side, a middle driving assembly (3-2), an end power shaft (3-3) and a lifting base assembly (3-4); the chain transmission assembly (3-1), the middle driving assembly (3-2) and the end power shaft (3-3) are all installed on the lifting base assembly (3-4), and two sides of the lifting base assembly (3-4) are fixedly connected with the sliding blocks (8) and the lifting chains (6) on two sides of the rack (1) so as to drive the lifting assembly (5) and the lifting chains (6) through the lifting assembly (5) and further drive the conveying assembly (3) to realize a lifting function along the auxiliary guide rail (7) under the action of the sliding blocks (8); the middle driving component (3-2) drives the chain transmission components (3-1) on the left side and the right side through the end power shaft (3-3) to realize synchronous transmission so as to realize the horizontal transmission function of workpieces.

2. The double-speed line heavy-load head-tail elevator as claimed in claim 1, wherein the jacking assembly (5) comprises a jacking shaft block (5-4) arranged at the telescopic end of the lifting cylinder (4), a jacking shaft (5-1) horizontally penetrating through the jacking shaft block (5-4), and a second chain wheel (5-2) mounted at two ends of the jacking shaft (5-1) through bearings (5-3) and meshed with the lifting chain (6), one end of the lifting chain (6) is fixedly connected with the bottom plate (18) of the frame (1) and the other end is fixedly connected with the lifting base assembly (3-4).

3. The double-speed line heavy-load head-tail elevator as claimed in claim 1 or 2, further comprising a limiting device (9) arranged on a top plate (15) of the frame (1) and corresponding to the upper end of the conveying assembly (3), wherein the limiting device (9) comprises an upper adjusting block (9-3), a first buffer (9-1) and an adjustable fixing rod (9-2) which are arranged on the upper adjusting block (9-3), and the height of the limiting device (9) on the top plate (15) is adjusted through the adjustable fixing rod (9-2) to realize adjustment of the buffer height.

4. A double speed line heavy load head and tail elevator according to claim 3, characterized in that the lifting base assembly (3-4) comprises a slider plate (3-4-a), a lifting side plate (3-4-b), a connecting profile (3-4-c), a connecting block (3-4-d), an upper impact block (3-4-e), a lower impact block (3-4-f), a chain pulling plate (3-4-g) and a buffer pulling plate (3-4-h); the two side ends of the sliding plate (3-4-a) at the two sides are connected through a lifting side plate (3-4-b), the lifting side plates (3-4-b) at the two sides are connected through a connecting section bar (3-4-c), the connecting blocks (3-4-d) are installed at two ends of the lifting side plate (3-4-b), the upper collision block (3-4-e) and the lower collision block (3-4-f) are installed at the upper end and the lower end of the sliding plate (3-4-a), the chain pull plates (3-4-g) are arranged on the inner side of the slider plate (3-4-a) and are positioned on both sides of the lower impact block (3-4-f), the buffer pull plates (3-4-h) are arranged at the bottoms of the two sides of the slider plate (3-4-a); the sliding block plates (3-4-a) on the two sides are fixedly connected with the sliding block (8) and the lifting chain (6) so as to drive the jacking assembly (5) and the lifting chain (6) through the jacking assembly (5) and further drive the conveying assembly (3) to realize the lifting function along the auxiliary guide rail (7) under the action of the sliding block (8).

5. A double speed line heavy load head and tail elevator according to claim 4, characterized in that it further has a compensator shaft (3-4-j) installed at one side of said slider plate (3-4-a) and a compensator (3-4-k) installed on said compensator shaft (3-4-j) to prevent the cylinders at both sides from being out of sync and from being stuck.

6. The double-speed-line heavy-load head-tail elevator as claimed in claim 4, wherein the chain transmission assembly (3-1) comprises two groups of supporting side plates (3-1-a) which correspond to the slider plates (3-4-a) on two sides respectively and are installed through the connecting blocks (3-4-d), the two groups of supporting side plates (3-1-a) are connected through a fixed-width shaft II (13), two ends of each group of supporting side plates (3-1-a) are connected through a fixed-width shaft I (3-1-b) in a supporting manner, two ends of the end power shaft (3-3) are rotatably connected with driving ends of the supporting side plates (3-1-a) on two sides through vertical bearing seats (3-1-d), and two ends of the end power shaft (3-3) are respectively connected with the supporting side plates (3-1-a) on two sides respectively The driving chain wheels (3-1-c) between the side plates (3-1-a) are in driving connection, driven chain wheels (3-1-h) installed through tensioning shafts (3-1-i) and tensioning blocks (3-1-j) are arranged at driven ends of the supporting side plates (3-1-a) on two sides, and the driving chain wheels (3-1-c) are in chain transmission connection with the driven chain wheels (3-1-h) through conveying chains (3-1-e) so as to achieve horizontal conveying of workpieces through the conveying chains (3-1-e).

7. A double-speed line heavy-load head-tail lifter according to claim 6, characterized in that a chain support (3-1-f) at the inner side of a conveying chain (3-1-e) is arranged above the middle of the supporting side plates (3-1-a) at two sides, and a guide part (3-1-g) is arranged at the upper part of the supporting side plates (3-1-a) at two sides for conveying and guiding the workpiece on the conveying chain (3-1-e).

8. The double-speed-line heavy-load head-tail elevator as claimed in claim 6, wherein the intermediate driving assembly (3-2) comprises a speed reducer (3-2-a) mounted on the lifting side plate (3-4-b) through a motor base (14), the output end of the speed reducer (3-2-a) is connected to a chain wheel (3-2-c) arranged on the end power shaft (3-3) through a chain (3-2-b), and the end power shaft (3-3) is driven by the torque transmitted by the chain (3-2-b) and then the conveying chains (3-1-e) on two sides are driven, so as to realize the horizontal conveying function of workpieces.

9. The double-speed line heavy-load head-tail elevator is characterized in that telescopic and up-down adjustable anti-collision buffer positioning devices (10) are arranged on two sides of the driving end of the chain transmission assembly (3-1), each positioning device (10) comprises a buffer frame (10-3) arranged on two sides of the driving end of the chain transmission assembly (3-1), and a second buffer (10-1) and a buffer block (10-2) arranged on the buffer frame (10-3); the middle of the chain transmission assembly (3-1) is provided with a sensing element (11) and the driving end is provided with a sensing bracket (12).

10. The double-speed line heavy-load head-tail elevator is characterized in that a lifting ring (16) is mounted on a top plate (15) of the frame (1) to realize a lifting function, and a foot cup (19) and a foot margin (20) are mounted at the bottom of a bottom plate (18) to realize a stable supporting function; the rack (1) is also provided with a drag chain (21) corresponding to the conveying assembly (3) to realize a lifting function by matching with the lifting assembly (2); a sealing plate (22) is further arranged on the side edge of the rack (1) to achieve the functions of dust prevention and safety protection; and the side edge of the frame (1) is also provided with a connecting plate (17) to realize the positioning and installation of the head-tail lifter in a speed doubling line.

Technical Field

The invention relates to a speed-multiplying chain conveying device, in particular to a speed-multiplying line heavy-load head-tail lifter.

Background

The speed-multiplying line is a material conveying device which is important for assembly and production processing procedures in the production and manufacturing industry, and the line body is usually composed of a head-tail elevator, a speed-multiplying line body and the like when in use. The upper-layer line body is used for enabling the tooling plate to flow to a working position and waiting for corresponding assembling or processing procedures of a manipulator or manual operation; the lower-layer line body is used for backflow of the tooling plate, and the head-tail lifter is used for switching and conveying the upper line body and the lower line body of the tooling plate. Such wires are typically in a linear or racetrack arrangement.

A heavy-load head-tail elevator is a classic traditional device, is widely used in common production and assembly, and is particularly common in the electronic automobile industry. The invention aims to provide a heavy-load head-tail elevator with a novel structure, so as to realize the purposes of easy manufacture, convenient installation and low cost.

Disclosure of Invention

In order to solve the technical problem, the invention provides a double-speed line heavy-load head-tail elevator which comprises a rack, and a lifting assembly and a conveying assembly which are arranged on the rack;

the lifting assembly comprises a lifting cylinder, a jacking assembly, a lifting chain, an auxiliary guide rail and a sliding block; the lifting cylinder is arranged on a bottom plate of the rack, the auxiliary guide rails are symmetrically arranged on two sides of the lifting cylinder, and the sliding blocks are fixed on the auxiliary sliding rails; the jacking assembly is arranged at the telescopic end of the lifting cylinder and drives a lifting chain in meshed connection with the jacking assembly, and the conveying assembly is fixedly connected with the sliding block and the lifting chain so as to drive the jacking assembly and the lifting chain through the jacking assembly and further drive the conveying assembly to realize a lifting function along the auxiliary guide rail under the action of the sliding block;

the conveying assembly comprises chain transmission components at the left side and the right side, a middle driving component, an end power shaft and a lifting base component; the chain transmission assembly, the middle driving assembly and the end power shaft are all arranged on the lifting base assembly, and two sides of the lifting base assembly are fixedly connected with the sliding blocks and the lifting chains on two sides of the rack, so that the lifting assembly drives the lifting assembly and the lifting chains through the lifting assembly and further drives the conveying assembly to realize a lifting function along the auxiliary guide rail under the action of the sliding blocks; the middle driving assembly drives the chain transmission assemblies on the left side and the right side through the end power shaft to realize synchronous transmission so as to realize the horizontal transmission function of workpieces.

Further, the jacking subassembly is including setting up the flexible end of lift cylinder's jacking axle piece, the level runs through the jacking axle of jacking axle piece to and install at the jacking axle both ends through the bearing and with the sprocket two that the lifting chain meshing is connected, the one end of lifting chain with the bottom plate fixed connection and the other end of frame with lifting base subassembly fixed connection.

Furthermore, the device is also provided with a limiting device which is arranged on a top plate of the rack and corresponds to the upper end of the conveying assembly, the limiting device comprises an upper adjusting block, a first buffer and an adjustable fixing rod, the first buffer and the adjustable fixing rod are arranged on the upper adjusting block, and the height of the limiting device on the top plate is adjusted through the adjustable fixing rod so as to realize the adjustment of the buffering height.

The lifting base assembly comprises a sliding block plate, a lifting side plate, a connecting profile, a connecting block, an upper collision block, a lower collision block, a chain pull plate and a buffer pull plate; the two side ends of the slider plates on the two sides are connected through lifting side plates, the lifting side plates on the two sides are connected through connecting profiles, the connecting blocks are installed at the two ends of the lifting side plates, the upper collision block and the lower collision block are installed at the upper end and the lower end of the slider plates, the chain pulling plates are arranged on the inner sides of the slider plates and located on the two sides of the lower collision block, and the buffer pulling plates are arranged at the bottoms of the two sides of the slider plates; the sliding block plates on two sides are fixedly connected with the sliding block and the lifting chain, so that the lifting assembly drives the lifting assembly and the lifting chain and further drives the conveying assembly to realize a lifting function along the auxiliary guide rail under the action of the sliding block.

Furthermore, the lifting base assembly is also provided with a compensator shaft arranged on one side of the sliding block plate and a compensator arranged on the compensator shaft, so that the cylinders on two sides are prevented from being asynchronous and being blocked.

Wherein, the chain drive subassembly is including corresponding both sides respectively the slider board passes through two sets of support curb plates of connecting block installation, it is two sets of through two connections of level width axle between the support curb plate, and every group support and connect through a level width axle support between the both ends of curb plate, pass through vertical bearing frame and both sides through the both ends of end power shaft the drive end of support curb plate realizes rotating to be connected just the both ends of end power shaft are respectively with set up in both sides every group the drive sprocket drive between the support curb plate is connected, both sides the driven end of supporting the curb plate all is provided with the driven sprocket through tensioning axle and tensioning block installation, drive sprocket passes through conveyor chain drive with driven sprocket and is connected, in order to pass through conveyor chain realizes the horizontal transport of work piece.

Furthermore, chain supports on the inner sides of the conveying chains are arranged in the middle of the supporting side plates on the two sides in the upward direction and used for supporting the conveying chains, and guiding parts are arranged on the upper portions of the supporting side plates on the two sides and used for conveying and guiding workpieces on the conveying chains.

The middle driving assembly comprises a speed reducer arranged on the lifting side plate through a motor base, the output end of the speed reducer is connected to a first chain wheel arranged on the end power shaft through a first chain, and the first chain wheel is used for transmitting torque to drive the end power shaft and further drive the conveying chains on two sides, so that the horizontal conveying function of workpieces is realized.

Optionally, telescopic and vertically adjustable anti-collision buffer positioning devices are arranged on two sides of the driving end of the chain transmission assembly, and each positioning device comprises a buffer frame arranged on two sides of the driving end of the chain transmission assembly, and a second buffer and a buffer block which are arranged on the buffer frame; the middle of the chain transmission assembly is provided with a sensing element, and the driving end of the chain transmission assembly is provided with a sensing bracket.

Optionally, a lifting ring is mounted on a top plate of the rack to realize a lifting function, and a foot cup and a foot margin are mounted at the bottom of the bottom plate to realize a stable supporting function; the frame is also provided with a drag chain corresponding to the conveying assembly so as to realize a lifting function by matching with the lifting assembly; the side edge of the rack is also provided with a sealing plate to realize the functions of dust prevention and safety protection; and the side edge of the rack is also provided with a connecting plate to realize the positioning and installation of the head-tail lifter in a speed doubling line.

Through the technical scheme, the lifting cylinder acts to drive the jacking assembly and the conveying assembly to move up and down along the auxiliary guide rail so as to realize the lifting function of the workpiece; the conveying assembly drives the end power shaft through the speed reducer to synchronously drive the conveying chains on two sides to realize the function of forward and backward translation of the workpiece, and has the advantages of easy manufacture, convenient installation, low price and large load.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below.

FIG. 1 is a schematic perspective view of a head-tail elevator according to an embodiment of the disclosure;

FIG. 2 is a schematic perspective view of a jacking assembly according to an embodiment of the disclosure;

FIG. 3 is a perspective view of a delivery assembly according to an embodiment of the disclosure;

FIG. 4 is a schematic perspective view of a lifting base assembly according to an embodiment of the disclosure;

fig. 5 is a schematic perspective view of the compensating assembly shown in fig. 4.

The reference numbers in the figures denote: 1. a frame; 2. a lifting assembly; 3. a transport assembly; 3-1. chain drive assembly; 3-1-a supporting side plate; 3-1-b, fixing a width shaft I; 3-1-c. a drive sprocket; 3-1-d. a vertical bearing seat; 3-1-e. a conveyor chain; 3-1-f. a chain support; 3-1-g. a guide; 3-1-h. a driven sprocket; 3-1-i. tensioning shaft; 3-1-j. a tensioning block; 3-2. intermediate drive assembly; 3-2-a. a speed reducer; 3-2-b. a chain I; 3-2-c. a first chain wheel; 3-3. end power shaft; 3-4, lifting the base assembly; 3-4-a. a slider plate; 3-4-b, lifting the side plates; 3-4-c. connecting profile; 3-4-d, connecting blocks; 3-4-e. an upper impact mass; 3-4-f. a lower collision mass; 3-4-g. chain pulling plate; 3-4-h. a buffer pulling plate; 3-4-j. compensator shaft; 3-4-k. compensator; 4. a lifting cylinder; 5. a jacking assembly; 5-1, jacking the shaft; 5-2, a second chain wheel; 5-3, bearing; 5-4, jacking the shaft block; 6. a lifting chain; 7. an auxiliary guide rail; 8. a slider; 9. a limiting device; 9-1, a first buffer; 9-2, an adjustable fixing rod; 9-3, an upper adjusting block; 10. a positioning device; 10-1, a second buffer; 10-2, a buffer block; 10-3, a buffer frame; 11. a sensing element; 12. a sensing support; 13. a second fixed width shaft; 14. a motor base; 15. a top plate; 16. a hoisting ring; 17. a connecting plate; 18. a base plate; 19. a foot cup; 20. ground feet; 21. a drag chain; 22. and (7) closing the plate.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Referring to fig. 1, the double-speed line heavy-load head-tail elevator provided by the invention comprises a frame 1, and a lifting assembly 2 and a conveying assembly 3 which are arranged on the frame 1; the lifting assembly 2 comprises a lifting cylinder 4, a jacking component 5, a lifting chain 6, an auxiliary guide rail 7 and a sliding block 8; the lifting cylinder 4 is arranged on a bottom plate 18 of the frame 1, the auxiliary guide rails 7 are symmetrically arranged on two sides of the lifting cylinder 4, and the sliding blocks 8 are fixed on the auxiliary sliding rails 7; the jacking component 5 is arranged at the telescopic end of the lifting cylinder 4 and drives a lifting chain 6 in meshed connection with the jacking component 5, and the conveying assembly 3 is fixedly connected with the sliding block 8 and the lifting chain 6 so as to drive the jacking component 5 and the lifting chain 6 through the jacking component 5 and further drive the conveying assembly 3 to realize a lifting function along the auxiliary guide rail 7 under the action of the sliding block 8; the buffer device is characterized by further comprising a limiting device 9 which is arranged on a top plate 15 of the rack 1 and corresponds to the upper side end of the conveying assembly 3, wherein the limiting device 9 comprises an upper adjusting block 9-3, a first buffer 9-1 and an adjustable fixing rod 9-2, the first buffer 9-1 is arranged on the upper adjusting block 9-3, and the height of the limiting device 9 on the top plate 15 is adjusted through the adjustable fixing rod 9-2 so as to achieve adjustment of the buffer height.

Referring to fig. 2, the jacking assembly 5 comprises a jacking shaft block 5-4 arranged at the telescopic end of the lifting cylinder 4, a jacking shaft 5-1 horizontally penetrating through the jacking shaft block 5-4, and two chain wheels 5-2 mounted at two ends of the jacking shaft 5-1 through bearings 5-3 and meshed with the lifting chain 6, wherein one end of the lifting chain 6 is fixedly connected with a bottom plate 18 of the frame 1 and the other end is fixedly connected with the lifting base assembly 3-4.

Referring to fig. 3, the conveying assembly 3 comprises a left side chain transmission component 3-1, a right side chain transmission component 3-1, a middle driving component 3-2, an end power shaft 3-3 and a lifting base component 3-4; the chain transmission component 3-1, the middle driving component 3-2 and the end power shaft 3-3 are all arranged on the lifting base component 3-4, and two sides of the lifting base component 3-4 are fixedly connected with the sliding blocks 8 and the lifting chains 6 on two sides of the rack 1, so that the lifting component 5 drives the lifting component 5 and the lifting chains 6 to drive the conveying assembly 3 to realize a lifting function along the auxiliary guide rail 7 under the action of the sliding blocks 8; the middle driving component 3-2 drives the chain transmission components 3-1 at the left side and the right side through the end power shaft 3-3 to realize synchronous transmission so as to realize the horizontal transmission function of the workpiece.

Referring to FIG. 4, the lifting base assembly 3-4 includes a slider plate 3-4-a, a lifting side plate 3-4-b, a connecting profile 3-4-c, a connecting block 3-4-d, an upper impact block 3-4-e, a lower impact block 3-4-f, a chain pulling plate 3-4-g, and a buffer pulling plate 3-4-h; the two side ends of the two side sliding plates 3-4-a are connected through lifting side plates 3-4-b, the lifting side plates 3-4-b on the two sides are connected through connecting profiles 3-4-c, connecting blocks 3-4-d are installed at the two ends of the lifting side plates 3-4-b, upper collision blocks 3-4-e and lower collision blocks 3-4-f are installed at the upper and lower ends of the sliding plate 3-4-a, chain pulling plates 3-4-g are arranged on the inner side of the sliding plate 3-4-a and located at the two sides of the lower collision blocks 3-4-f, and buffer pulling plates 3-4-h are arranged at the bottoms of the two sides of the sliding plate 3-4-a; the two side sliding blocks 3-4-a are fixedly connected with the sliding block 8 and the lifting chain 6, so that the lifting component 5 drives the lifting component 5 and the lifting chain 6 to further drive the conveying assembly 3 to realize the lifting function along the auxiliary guide rail 7 under the action of the sliding block 8.

Referring to fig. 5, the lifting base assembly 3-4 further includes a compensator shaft 3-4-j installed at one side of the slider plate 3-4-a and a compensator 3-4-k installed at the compensator shaft 3-4-j to prevent the cylinders at both sides from being out of sync and from being stuck.

Referring to FIG. 3, the chain transmission assembly 3-1 comprises two groups of supporting side plates 3-1-a which correspond to the two side sliding plates 3-4-a respectively and are installed through connecting blocks 3-4-d, the two groups of supporting side plates 3-1-a are connected through a fixed width shaft II 13, two ends of each group of supporting side plates 3-1-a are in supporting connection through a fixed width shaft I3-1-b, two ends of an end head power shaft 3-3 are in rotating connection with driving ends of the supporting side plates 3-1-a at two sides through vertical bearing seats 3-1-d, two ends of the end head power shaft 3-3 are in driving connection with driving chain wheels 3-1-c arranged between the supporting side plates 3-1-a at two sides respectively, driven ends of the supporting side plates 3-1-a at two sides are provided with tensioning shafts 3-1-i The driven chain wheel 3-1-h is arranged on the tensioning block 3-1-j, and the driving chain wheel 3-1-c and the driven chain wheel 3-1-h are in chain transmission connection through the conveying chain 3-1-e so as to realize the horizontal conveying of the workpiece through the conveying chain 3-1-e; a chain support 3-1-f at the inner side of the conveying chain 3-1-e is arranged above the middle of the supporting side plate 3-1-a at two sides, and the upper parts of the supporting side plates 3-1-a at two sides are provided with guide pieces 3-1-g for conveying and guiding the workpiece on the conveying chain 3-1-e; the middle driving assembly 3-2 comprises a speed reducer 3-2-a which is arranged on a lifting side plate 3-4-b through a motor base 14, the output end of the speed reducer 3-2-a is connected to a chain wheel I3-2-c arranged on the end power shaft 3-3 through a chain I3-2-b, and the end power shaft 3-3 is driven by the torque transmitted by the chain I3-2-b and then the conveying chains 3-1-e on the two sides are driven, so that the horizontal conveying function of the workpiece is realized.

Referring to fig. 3, both sides of the driving end of the chain transmission assembly 3-1 are provided with a positioning device 10 which is telescopic and can adjust up and down for crash prevention and buffer, and the positioning device 10 comprises a buffer frame 10-3 arranged on both sides of the driving end of the chain transmission assembly 3-1, a second buffer 10-1 and a buffer block 10-2 arranged on the buffer frame 10-3; the chain drive assembly 3-1 is equipped with a sensor element 11 in the middle and the drive end is provided with a sensor carrier 12.

Referring to fig. 1, a top plate 15 of a frame 1 is provided with a lifting ring 16 to realize a lifting function, and the bottom of a bottom plate 18 is provided with a foot cup 19 and a foot 20 to realize a stable supporting function; the frame 1 is also provided with a drag chain 21 corresponding to the conveying assembly 3 to realize the lifting function by matching with the lifting assembly 2; the side of the frame 1 is also provided with a sealing plate 22 to realize the functions of dust prevention and safety protection; the side of the frame 1 is also provided with a connecting plate 17 to realize the positioning and installation of the head-tail lifter in the speed doubling line.

The lifting cylinder 4 acts to drive the jacking assembly 5 and the conveying assembly 3 to move up and down along the auxiliary guide rail 7, so that the workpiece is lifted; the conveying assembly 3 drives the end power shaft 3-3 through the speed reducer 3-2-a to synchronously drive the conveying chains 3-1-e at the two sides to synchronously transmit so as to realize the front and back translation of the workpiece, and has the advantages of easy manufacture, convenient installation, low price and large load.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to the above-described embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.