CN217252227U

CN217252227U - Workpiece jacking mechanism

Info

Publication number: CN217252227U
Application number: CN202120455652.XU
Authority: CN
Inventors: 吕志威
Original assignee: Shenzhen Gimech Technology Corp
Current assignee: Shenzhen Gimech Technology Corp
Priority date: 2021-03-02
Filing date: 2021-03-02
Publication date: 2022-08-23
Anticipated expiration: 2031-03-02

Abstract

The application provides a work piece climbing mechanism, including the backup pad, the backup pad driving piece, supporting shoe and supporting component, supporting shoe and backup pad fastening connection, and protrusion in the bottom side of backup pad, the backup pad driving piece is connected with the backup pad drive, be used for ordering about backup pad and supporting shoe and rise or descend, the supporting component includes cushion and cushion driving piece, the cushion driving piece is connected with the cushion drive, be used for ordering about the bottom side that the cushion removed in order to stretch into or withdraw from the supporting shoe along the horizontal direction. The application provides a work piece climbing mechanism maintains the height of backup pad through the supporting shoe, prescribe a limit to the position of supporting shoe through the cushion, bear the work piece jointly and transmit the pressure for the backup pad through supporting shoe and cushion, avoided this pressure to transmit to cause backup pad driving piece or transfer chain to damage on backup pad driving piece or the transfer chain, make the work piece can carry out the riveting process on the transfer chain, thereby the technical problem that the work piece can't carry out the riveting process on the transfer chain has been solved effectively.

Description

Workpiece jacking mechanism

Technical Field

The application belongs to the technical field of product assembly, and more specifically relates to a work piece climbing mechanism.

Background

At present, a product which completes assembly of a part of components or all components in a riveting manner generally needs to be subjected to a riveting procedure on a special workbench, because in the riveting process, the workbench directly bears the pressure applied to a workpiece by a press machine, and needs to bear a large load. In order to ensure the consistency of the production process, an operator or a manipulator is required to convey workpieces between a conveying line and a special workbench of an assembly line, which inevitably affects the assembly efficiency of the products, however, if the riveting process is directly carried out on the conveying line, the conveying line is easily overloaded due to the large force of a press, and the conveying line is damaged.

SUMMERY OF THE UTILITY MODEL

The application aims to provide a workpiece jacking mechanism, which comprises but is not limited to solve the technical problem that workpieces cannot be riveted on a conveying line.

The application provides a work piece climbing mechanism locates on the transfer chain of assembly line, and it includes backup pad, backup pad driving piece, supporting shoe and supporting component, the supporting shoe with backup pad fastening connection, and protrusion in the bottom side of backup pad, the backup pad driving piece with the backup pad drive is connected, is used for ordering about the backup pad with the supporting shoe rises or descends, the supporting component includes cushion and cushion driving piece, the cushion driving piece with the cushion drive is connected, is used for ordering about the cushion removes in order to stretch into or withdraw from along the horizontal direction the bottom side of supporting shoe.

Optionally, the workpiece jacking mechanism further comprises an installation part used for connecting the workpiece jacking mechanism to the ground, the supporting plate is located on the top side of the installation part, the supporting plate driving part and the cushion block driving part are arranged on the installation part, a first avoidance hole used for avoiding the supporting block is formed in the installation part, and the cushion block is connected to the top surface of the installation part in a sliding mode.

Optionally, the supporting component still includes first supporting seat, first supporting seat is fixed in on the top surface of installed part, and is located the first top side of dodging the hole, offer the confession on the first supporting seat the cushion holds and establishes and supplies with gliding logical groove the skylight that the supporting shoe passed, the central line that leads to the groove extends along the horizontal direction, the skylight with first dodge the hole respectively with lead to the groove intercommunication, the cushion driving piece is located on the first supporting seat.

Optionally, the workpiece jacking mechanism further comprises a guide assembly, the guide assembly comprises a sleeve and a first guide rod, the sleeve is fixed on the mounting piece and vertically penetrates through the mounting piece, one end of the first guide rod is fixedly connected with the support plate, and the other end of the first guide rod penetrates through the sleeve and extends out of the bottom side of the mounting piece.

Optionally, the guide assembly further includes a limiting member and a buffering member, the limiting member is fixed to the end portion of the first guide rod located at the bottom side of the mounting member, and is used for abutting against the sleeve to limit the first guide rod to continue to slide upwards along the sleeve, and the buffering member is sleeved on the first guide rod and located between the limiting member and the sleeve.

Optionally, the workpiece jacking mechanism includes two support blocks, two sets of support assemblies and two sets of guide assemblies, the two support blocks and the two sets of guide assemblies are alternately arranged around the same vertical axis at intervals, and the support assemblies correspond to the support blocks one to one.

Optionally, the supporting plate driving part and the cushion block driving part are respectively provided with a sensor for detecting a state of the driving end.

Optionally, a positioning die for abutting against the pressure head and allowing the centering rod of the pressure head to extend into is arranged in the middle of the supporting plate.

Optionally, still be equipped with balanced subassembly on the top surface of backup pad, balanced subassembly includes second supporting seat, a plurality of second guide bar and a plurality of spring, the hole is dodged to the second has been seted up at the middle part of second supporting seat, positioning die's top is passed the second dodges the hole expose in the top side of second supporting seat, and is a plurality of the second guide bar winds positioning die interval sets up, the one end of second guide bar with backup pad fastening connection, the other end of second guide bar wears to locate on the second supporting seat, the spring overlaps one to one and locates on the second guide bar, just the both ends of spring respectively with the backup pad with second supporting seat butt, so that the second supporting seat suspends in the backup pad.

Optionally, the top surface of the supporting plate is further provided with a positioning pin for extending into a positioning hole of the workpiece tray.

The application provides a work piece climbing mechanism's beneficial effect lies in: the utility model discloses a riveting press, including the backup pad, the backup pad driving piece, the supporting shoe cooperates with the supporting component, maintain the height of backup pad through the supporting shoe, the position of supporting shoe is injectd through the cushion, bear the pressure that the work piece transmitted for the backup pad jointly through supporting shoe and cushion, avoided this pressure to transmit to cause backup pad driving piece or transfer chain to damage on backup pad driving piece or the transfer chain, make the work piece can carry out the riveting process on the transfer chain, thereby the technical problem that the work piece can't carry out the riveting process on the transfer chain has been solved effectively, be favorable to improving the assembly efficiency of product.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

FIG. 1 is a schematic perspective view of a workpiece jacking mechanism provided herein;

FIG. 2 is a left side schematic view of FIG. 1;

fig. 3 is a partially exploded schematic view of a workpiece jacking mechanism provided in the present application.

Wherein, in the figures, the respective reference numerals:

10-workpiece jacking mechanism, 11-supporting plate, 12-supporting plate driving part, 13-supporting block, 14-supporting component, 15-mounting part, 16-guiding component, 17-inductor, 18-balancing component, 111-positioning die, 112-positioning pin, 141-cushion block, 142-cushion block driving part, 143-first supporting seat, 161-sleeve, 162-first guiding rod, 163-limiting part, 164-buffering part, 181-second supporting seat, 182-second guiding rod, 183-spring, 1110-positioning hole, 1431-through groove, 1432-skylight, 1811-second avoiding hole and 1812-guiding hole.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It should be noted that: when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly connected to the other element. When an element is referred to as being "connected" to another element, it can be directly or indirectly connected to the other element. When a component is referred to as being "electrically connected" to another component, it can be electrically connected by a conductor, or it can be electrically connected by radio, or it can be connected by various other means capable of transmitting electrical signals. The terms "upper", "lower", "left", "right", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the patent, the specific meaning of which terms will be understood by those skilled in the art according to the particular circumstances. The term "plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1 and 2, a workpiece lifting mechanism 10 is provided on a conveying line of an assembly line, specifically, on a bottom side of a workpiece to be conveyed, for lifting the workpiece entering a riveting station to a top side of the conveying line. In the present application, the workpiece jacking mechanism 10 includes a supporting plate 11, a supporting plate driving member 12, a supporting block 13 and a supporting assembly 14, wherein the supporting block 13 is fixedly connected to the supporting plate 11, and the supporting block 13 protrudes from the bottom side of the supporting plate 11, the supporting plate driving member 12 is drivingly connected to the supporting plate 11 for driving the supporting plate 11 and the supporting block 13 to ascend or descend, the supporting assembly 14 includes a cushion block 141 and a cushion block driving member 142, and the cushion block driving member 142 is drivingly connected to the cushion block 141 for driving the cushion block 141 to move in a horizontal direction to extend into or withdraw from the bottom side of the supporting block 13. It can be understood that the support plate 11 is fixedly connected with the driving end of the support plate driving member 12, and when the support plate driving member 12 is started, the driving end of the support plate driving member 12 can drive the support plate 11 to drive the support block 13 to ascend or descend together along the vertical direction; the cushion block 141 is fastened and connected with the driving end of the cushion block driving piece 142, and when the cushion block driving piece 142 is started, the driving end of the cushion block driving piece 142 can drive the cushion block 141 to move along the horizontal direction.

In practical applications, the workpiece lifting mechanism 10 is an actuator in an assembly line of products to be assembled by riveting, the assembly line further includes a conveying line, a riveting device, a control device and the like, and the control device controls the conveying line to continuously convey workpieces through the riveting device. When a workpiece is conveyed to a riveting station by a conveying line, the control device starts the supporting plate driving piece 12, the supporting plate driving piece 12 drives the supporting plate 11 to push the workpiece to rise to a set height, the supporting block 13 also rises to the set height along with the supporting plate 11, then the control device starts the cushion block driving piece 142, the cushion block driving piece 142 drives the cushion block 141 to move to the bottom side of the supporting block 13 and support the supporting block 13, and then the control device starts the riveting device to punch the workpiece; after the riveting process is completed, the cushion block driving part 142 drives the cushion block 141 to leave the bottom side of the supporting block 13, then the supporting plate driving part 12 drives the supporting plate 11 to drive the workpiece and the supporting block 13 to descend until the workpiece returns to the conveying line, and the conveying line continues to convey the workpiece to the next station.

The application provides a work piece climbing mechanism 10, the backup pad 11 has been adopted, backup pad driving piece 12, supporting shoe 13 cooperates with supporting component 14, maintain the height of backup pad 11 through supporting shoe 13, inject the position of supporting shoe 13 through cushion 141, bear the work piece jointly and transmit the pressure for backup pad 11 through supporting shoe 13 and cushion 141, avoided this pressure to transmit and cause backup pad driving piece 12 and transfer chain to damage on backup pad driving piece 12 and the transfer chain, make the work piece can carry out the riveting process on the transfer chain, thereby the technical problem that the work piece can't carry out the riveting process on the transfer chain has been solved effectively, be favorable to improving the assembly efficiency of product.

Optionally, referring to fig. 1 and fig. 2, as an embodiment of the workpiece lifting mechanism provided by the present application, the workpiece lifting mechanism 10 further includes a mounting part 15, the mounting part 15 is used for connecting the workpiece lifting mechanism 10 to the ground, the supporting plate 11 is located on a top side of the mounting part 15, the supporting plate driving part 12 and the cushion block driving part 142 are disposed on the mounting part 15, meanwhile, a first avoiding hole (not shown) for avoiding the supporting block 13 is formed in the mounting part 15, and the cushion block 141 is slidably connected to a top surface of the mounting part 15. Specifically, the mounting member 15 is a mounting plate, and is fastened to a grounding bracket of the conveying line, so that the pressure borne by the workpiece lifting mechanism 10 is transmitted to the ground through the grounding bracket, and the workpiece lifting mechanism 10 can provide sufficient support for the workpiece; in the non-working state, the support plate 11 can be horizontally placed on the top surface of the mounting part 15 or the top surface of the cushion block 141, the support plate driving part 12 is preferably an air cylinder, the cylinder body of the support plate driving part 12 is fixed on the bottom surface of the mounting part 15, and the driving end of the support plate driving part 12 penetrates through the mounting part 15 and is fixedly connected on the bottom surface of the support plate 11; the horizontal section contour of the first avoidance hole is matched with the horizontal section contour of the supporting block 13, the supporting block 13 penetrates through the first avoidance hole in a non-working state, and the bottom end of the supporting block 13 extends out of the bottom side of the mounting piece 15; at least one of the length, the width and the horizontal cross-sectional area of the cushion block 141 is larger than that of the first avoidance hole, so that the supporting block 13 in the working state is abutted against the cushion block 141 and cannot be retracted into the first avoidance hole, and the supporting block 13 is ensured to support the supporting plate 11.

Optionally, referring to fig. 1 and fig. 2, as an embodiment of the workpiece jacking mechanism provided by the present application, the supporting assembly 14 further includes a first supporting seat 143, the first supporting seat 143 is fixed on the top surface of the mounting part 15, the first supporting seat 143 is located on a top side of the first avoiding hole, a through slot 1431 and a louver 1432 are opened on the first supporting seat 143, wherein a center line of the through slot 1431 extends along the horizontal direction, the louver 1432 and the first avoiding hole of the mounting part 15 are respectively communicated with the through slot 1431, the cushion block 141 is accommodated in the through slot 1431 and can slide along the through slot 1431, the supporting block 13 can abut against the cushion block 141 after passing through the louver 1432, and the cushion block 142 is disposed on the first supporting seat 143. Specifically, the bottom wall of the first supporting seat 143 is provided with a notch or an avoidance hole, the notch or the avoidance hole serves as a passage for communicating the first avoidance hole of the mounting part 15 with the through groove 1431, the skylight 1432 is provided on the top wall of the first supporting seat 143 and is directly communicated with the through groove 1431, in a non-working state, the supporting plate 11 is placed on the top surface of the first supporting seat 143, so that a space is reserved between the supporting plate 11 and the mounting part 15, the space provides an accommodating space for a fastener for connecting the supporting plate 11 and the supporting plate driving part 12, and the supporting block 13 sequentially penetrates through the first avoidance hole of the skylight 1432, the through groove 1431 and the mounting part 15; the volume of the cushion block 141 is smaller than the volume of the through groove 1431, the cushion block driving part 142 is preferably an air cylinder, a cylinder body of the cushion block driving part 142 is fixed on the first support seat 143, a driving end of the cushion block driving part 142 extends into the through groove 1431 and is fixedly connected with the cushion block 141, in an operating state, the cushion block driving part 142 can drive the cushion block 141 to slide along the through groove 1431 and close a channel through which the first avoidance hole of the installation part 15 is communicated with the through groove 1431, so that the raised support block 13 can only penetrate through the skylight 1432 and abut against the cushion block 141, and the support plate 11 is ensured to be kept at a certain height and can bear the pressure generated by the riveting device.

Optionally, referring to fig. 1 and fig. 2, as an embodiment of the workpiece lifting mechanism provided by the present application, the workpiece lifting mechanism 10 further includes a guide assembly 16, the guide assembly 16 includes a sleeve 161 and a first guide rod 162, wherein the sleeve 161 is fixed on the mounting member 15 and vertically penetrates through the mounting member 15, one end of the first guide rod 162 is fixedly connected with the support plate 11, and the other end of the first guide rod 162 penetrates through the sleeve 161 and extends out of the bottom side of the mounting member 15. Specifically, a mounting hole is opened on the mounting member 15, the sleeve 161 is inserted into the mounting hole and is tightly connected with the mounting member 15, and the first guiding rod 162 is inserted on the sleeve 161 and can slide vertically along the sleeve 161. So that the stability of the process of lifting the workpiece by the supporting plate 11 can be effectively improved by the guide assembly 16.

Optionally, referring to fig. 1 and fig. 2, as an embodiment of the workpiece lifting mechanism provided by the present application, the guide assembly 16 further includes a limiting member 163 and a buffering member 164, where the limiting member 163 is fixed on an end portion of the first guide rod 162 located at the bottom side of the mounting member 15, and is used for abutting against the sleeve 161 to limit the first guide rod 162 to continuously slide upwards along the sleeve 161, the buffering member 164 is sleeved on the first guide rod 162, and the buffering member 164 is located between the limiting member 163 and the sleeve 161. Specifically, the limiting member 163 is a tightening member, and cooperates with the support plate 11 to limit the first guide bar 162 on the sleeve 161, so as to prevent the support plate 11 from rising above a set height; the buffer 164 is an annular elastomer member disposed between the stopper 163 and the sleeve 161, and can effectively prevent the stopper 163 from rigidly contacting the sleeve 161.

Alternatively, referring to fig. 1, as an embodiment of the workpiece lifting mechanism provided by the present application, the workpiece lifting mechanism 10 includes two supporting blocks 13, two sets of supporting components 14, and two sets of guiding components 16, the two supporting blocks 13 and the two sets of guiding components 16 are alternately arranged around a same vertical axis at intervals, and the supporting components 14 correspond to the supporting blocks 13 one to one. Specifically, the two support blocks 13 are symmetrically disposed with reference to the support plate driving member 12, the two sets of guide assemblies 16 are symmetrically disposed with reference to the support plate driving member 12, and the two sets of support assemblies 14 are disposed between the two first guide rods 162 and respectively cooperate with the two support blocks 13 one to one. Thereby further improving the supporting effect of the workpiece jacking mechanism 10 on the workpiece and the stability of the process of driving the workpiece to lift.

Optionally, referring to fig. 1 and fig. 2, as an embodiment of the workpiece jacking mechanism provided in the present application, the sensors 17 for detecting the driving end state are respectively disposed on the supporting plate driving part 12 and the pad driving part 142. Specifically, the sensor 17 is a position sensor, the sensor 17 disposed on the support plate driving member 12 is used for detecting a position of the driving end of the support plate driving member 12 to ensure that the control device knows an operating state of the driving end of the support plate driving member 12, and the sensor 17 disposed on the cushion block driving member 142 is used for detecting a position of the driving end of the cushion block driving member 142 to ensure that the control device knows an operating state of the driving end of the cushion block driving member 142 to ensure that the riveting process is smoothly performed.

Alternatively, referring to fig. 1 to 3, as an embodiment of the workpiece lifting mechanism provided by the present application, a positioning mold 111 is disposed in a middle portion of the supporting plate 11, and the positioning mold 111 is used for abutting against the pressing head and allowing a centering rod of the pressing head to extend into the positioning mold. Specifically, the shape and size of the positioning die 111 are adapted to the shape and size of the workpiece, and are used for extending into the workpiece to support the part of the workpiece subjected to stamping, a positioning hole 1110 is formed in the center of the top surface of the positioning die 111, and the shape and size of the positioning hole 1110 are adapted to the shape and size of a centering rod on a ram of the riveting device, so that the centering rod extends into the positioning hole and is matched with the centering rod to position the stamping position of the ram.

Alternatively, referring to fig. 1 to 3, as an embodiment of the workpiece jacking mechanism provided by the present application, a balancing assembly 18 is further provided on the top surface of the support plate 11, the balancing assembly 18 including a second support seat 181, a plurality of second guide bars 182 and a plurality of springs 183, wherein, a second avoiding hole 1811 is opened in the middle of the second supporting seat 181, the top end of the positioning mold 111 passes through the second avoiding hole 1811 to be exposed at the top side of the second supporting seat 181, a plurality of second guiding rods 182 are arranged around the positioning mold 111 at intervals, one end of each second guiding rod 182 is fastened to the supporting plate 11, the other end of each second guiding rod 182 is inserted into the second supporting seat 181, the springs 183 are sleeved on the second guiding rods 182 one by one, and both ends of the spring 183 abut against the support plate 11 and the second support seat 181, respectively, so that the second support seat 181 is suspended on the support plate 11. Specifically, the bottom of the second support seat 181 is provided with an accommodating groove, the plurality of second guide rods 182 and the plurality of springs 183 are accommodated in the accommodating groove, the top wall of the second support seat 181 is provided with a plurality of guide holes 1812 for the second guide rods 182 to penetrate through, the guide holes 1812 are communicated with the accommodating groove, and the thickness of the top wall of the second support seat 181 is greater than the distance between the second support seat 181 and the support plate 11, so as to ensure that the top ends of the second guide rods 182 cannot penetrate through the guide holes 1812 and extend out of the top side of the second support seat 181 when the second support seat 181 abuts against the support plate 11; the bottom end of the spring 183 abuts against the top surface of the support plate 11, and the top end of the spring 183 abuts against the inner surface of the top wall of the second support seat 181, for providing an elastic force to the second support seat 181 to balance the weight of the work pallet, preventing the work pallet from coming into rigid contact with the support plate 11.

Alternatively, referring to fig. 1 to 3, as an embodiment of the workpiece lifting mechanism provided in the present application, a positioning pin 112 for extending into the positioning hole of the workpiece tray is further disposed on the top surface of the supporting plate 11. Specifically, at least two positioning pins 112 are disposed on the top surface of the supporting plate 11, the at least two positioning pins 112 are disposed around the positioning mold 111 at intervals, and the positions thereof correspond to the positions of the positioning holes of the workpiece tray, and when the supporting plate 11 jacks up the workpiece tray under the driving of the supporting plate driving member 12, the positioning pins 112 extend into the positioning holes of the workpiece tray, so that the workpiece tray is accurately positioned on the supporting plate 11.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. The utility model provides a work piece climbing mechanism, locates on the transfer chain of assembly line, its characterized in that, work piece climbing mechanism includes backup pad, backup pad driving piece, supporting shoe and supporting component, the supporting shoe with backup pad fastening connection to protrusion in the bottom side of backup pad, the backup pad driving piece with the backup pad drive is connected, is used for ordering about the backup pad with the supporting shoe rises or descends, the supporting component includes cushion and cushion driving piece, the cushion driving piece with the cushion drive is connected, is used for ordering about the cushion removes in order to stretch into or withdraw from along the horizontal direction the bottom side of supporting shoe.

2. The workpiece jacking mechanism as claimed in claim 1, further comprising an installation member for connecting the workpiece jacking mechanism to the ground, wherein the supporting plate is located on a top side of the installation member, the supporting plate driving member and the cushion block driving member are disposed on the installation member, the installation member is provided with a first avoiding hole for avoiding the supporting block, and the cushion block is slidably connected to a top surface of the installation member.

3. The workpiece jacking mechanism as claimed in claim 2, wherein the support assembly further comprises a first support seat, the first support seat is fixed on the top surface of the mounting member and is located on a top side of the first avoiding hole, the first support seat is provided with a through groove for accommodating and sliding the cushion block and a skylight for passing the support block, a central line of the through groove extends along a horizontal direction, the skylight and the first avoiding hole are respectively communicated with the through groove, and the cushion block driving member is arranged on the first support seat.

4. The workpiece jacking mechanism as claimed in claim 2, further comprising a guide assembly, said guide assembly including a sleeve and a first guide rod, said sleeve being fixed to said mounting member and extending vertically through said mounting member, one end of said first guide rod being fixedly connected to said support plate, and the other end of said first guide rod extending through said sleeve to the bottom side of said mounting member.

5. The workpiece lifting mechanism according to claim 4, wherein the guide assembly further comprises a limiting member and a buffering member, the limiting member is fixed to an end portion of the first guide rod located at the bottom side of the mounting member and is used for abutting against the sleeve to limit the first guide rod to continue to slide upwards along the sleeve, and the buffering member is sleeved on the first guide rod and located between the limiting member and the sleeve.

6. The workpiece jacking mechanism as claimed in claim 4 or 5, including two said support blocks, two said sets of support members and two said sets of guide members, the two said support blocks and two said sets of guide members being alternately spaced about a common vertical axis, the said support members being in one-to-one correspondence with the said support blocks.

7. The workpiece lifting mechanism as recited in any one of claims 1 to 5, wherein the support plate driving member and the pad driving member are respectively provided with a sensor for detecting a state of the driving end.

8. The workpiece jacking mechanism as claimed in any one of claims 1 to 5, wherein a positioning die for abutting against the indenter and into which a centering rod of the indenter is inserted is provided in a middle portion of the support plate.

9. The workpiece jacking mechanism according to claim 8, wherein a balance assembly is further arranged on the top surface of the supporting plate, the balance assembly comprises a second supporting seat, a plurality of second guide rods and a plurality of springs, a second avoiding hole is formed in the middle of the second supporting seat, the top end of the positioning die penetrates through the second avoiding hole to be exposed out of the top side of the second supporting seat, the second guide rods are arranged around the positioning die at intervals, one end of each second guide rod is fixedly connected with the supporting plate, the other end of each second guide rod penetrates through the second supporting seat, the springs are sleeved on the second guide rods in a one-to-one manner, and the two ends of each spring are respectively abutted against the supporting plate and the second supporting seat, so that the second supporting seat is suspended on the supporting plate.

10. The workpiece lift mechanism of claim 8, wherein said support plate further includes a positioning pin on a top surface thereof for extending into a positioning hole of the workpiece pallet.