CN220300310U - Lifting device - Google Patents

Abstract

The utility model relates to the field of pallet conveying tools and discloses a lifting device, which comprises a table panel (1), a transition plate (2) and a lifting mechanism, wherein the table panel (1) and the transition plate (2) are connected through the lifting mechanism; the lifting mechanism comprises a roller assembly (43), a wedge block (44) and a lifting drive (45), wherein the lifting drive (45) is connected with the wedge block (44) to drive the wedge block (44) to advance or retreat, the roller assembly (43) is connected to the lower surface of the transition plate (2), rollers of the roller assembly (43) are matched with inclined planes of the wedge block (44), and the transition plate (2) rises or descends along with the advance or retreat of the wedge block (44). The lifting device adopts a mode of matching the idler wheels with the wedge blocks to realize lifting, and continuous work can be realized.

Description

Lifting device

Technical Field

The utility model relates to the field of pallet conveying tools, in particular to a lifting device.

Background

In the process of producing products by the electric drive production line, part of working procedures can be completed only by changing the postures of workpiece products on the production line, so that the tool of the production line is usually required to have the functions of lifting and rotating at the same time.

In the occasion that the lifting height is not large and the stability of the lifting process and the control precision of the lifting height are required, a mode of using wedge blocks to lift the target object is generally adopted in the industry. This approach uses two inter-fitting wedges, one of which is connected to the target and the target has only freedom to move in the vertical direction, the other of which can move horizontally. When the wedge block which moves horizontally moves along the horizontal direction, the inclined surface of the other wedge block slides on the inclined surface of the wedge block which moves horizontally, so that the lifting function is realized.

By adopting the wedge block lifting mode, because sliding friction exists between the two inclined planes to generate heat, when the wedge block is required to be lifted frequently, a large amount of heat can be generated by continuous reciprocating friction between the two inclined planes, so that the wedge block lifting mechanism cannot work continuously, and the heat dissipation time is required to be reserved for the wedge block.

Disclosure of Invention

In order to solve the problem that a wedge lifting mechanism cannot work continuously in the prior art, the utility model provides a lifting device which adopts a mode that rollers are matched with wedge blocks to realize lifting and can realize continuous work.

In order to achieve the above object, the present utility model provides a lifting device, which comprises a deck plate, a transition plate and a lifting mechanism, wherein the deck plate and the transition plate are connected by the lifting mechanism;

the lifting mechanism comprises a roller assembly, a wedge block and a lifting drive, wherein the lifting drive is connected with the wedge block to drive the wedge block to move forwards or backwards, the roller assembly is connected to the lower surface of the transition plate, the roller of the roller assembly is matched with the inclined surface of the wedge block, and the transition plate rises or descends along with the advancing or retreating of the wedge block.

Preferably, the table top plate is provided with a sliding rail, the lower end face of the wedge block is connected with a first mounting plate, the lower surface of the first mounting plate is provided with a sliding block, and the sliding rail is matched with the sliding block.

Preferably, a first waiting position is arranged on the first mounting plate, and the transition plate is at the lowest position when the roller assembly is matched with the first waiting position.

Preferably, a second waiting position is arranged at the upper end of the wedge-shaped block, and the transition plate is at the highest position when the roller assembly is matched with the second waiting position.

Preferably, the lower surface of the transition plate is detachably provided with a plurality of guide rods, the upper surface of the table panel is provided with a plurality of guide sleeves corresponding to the guide rods one by one, the table panel and the guide sleeves are coaxially provided with through holes, and the guide rods can extend out of the through holes.

Preferably, a lifting state detection bracket is arranged on the table panel, and a lifting in-place sensor and a lifting in-situ sensor are arranged on the lifting state detection bracket.

Preferably, the lifting device further comprises a lifting plate and a slewing mechanism, wherein the lifting plate is connected with the transition plate through the slewing mechanism;

the rotary mechanism comprises a driving piece, a rotary support and a transmission flange seat, the rotary support is connected with the transition plate and the lifting plate, a first rotary hole is formed in the transition plate, and a rotary shaft of the driving piece penetrates out of the first rotary hole and is connected with the lifting plate through the transmission flange seat.

Preferably, a limiter is arranged on the transition plate, and the lower end surface of the lifting plate is connected with a collision block matched with the limiter;

the transition plate is also provided with a collision block detection switch which is used for detecting whether the collision block is in place or not.

Preferably, a plurality of supporting blocks are arranged on the lifting plate, and two of the plurality of supporting blocks are arranged along the diagonal line of the lifting plate;

two tray leveling devices are arranged on the transition plate and correspond to the two supporting blocks arranged along the diagonal line.

Preferably, the tray leveling device comprises a travel switch, a detection spring and a guide sleeve, wherein the detection spring is sleeved in the guide sleeve, the detection end of the travel switch is not lower than the upper end face of the guide sleeve, and the upper end of the detection spring exceeds the travel switch.

According to the technical scheme, in the lifting process of the transition plate, rolling friction is generated between the roller assembly and the wedge block, and the contact surface between the roller assembly and the wedge block is small when the roller assembly moves relatively, and when the roller assembly moves reciprocally on the wedge block, the heat dissipation function can be rapidly realized at the part which does not contact with the wedge block, so that the roller assembly and the wedge block are matched, the heating problem cannot be generated, and the transition plate can be lifted continuously.

Drawings

FIG. 1 is a perspective view of a lifting device;

FIG. 2 is a state diagram of a lift mechanism and deck plate connection;

FIG. 3 is a state diagram of a lifting mechanism and transition plate connection;

fig. 4 is a top view of a lifting device.

Description of the reference numerals

1 deck plate 2 transition plate

3 lifting plate 41 guide bar

51 driver 42 guide sleeve

43 roller assembly 44 wedge block

45 lifting drive 11 sliding rail

441 first mounting plate 442 slider

443 first waiting position 444 second waiting position

12 lifting state detecting bracket 52 rotary support

53 drive flange seat 14 lifting in-situ sensor

22 limiter 23 collision block detection switch

31 ram 32 support block

24 travel switch 25 detects spring

26 sensor for lifting guide sleeve 13 into position

Detailed Description

In the present utility model, unless otherwise indicated, terms of orientation such as "lower, upper, lower end, lower surface, upper surface" are used to generally refer to the orientation of the term in the normal state of use or are commonly known to those skilled in the art and should not be construed as limiting the term.

Referring to fig. 1 to 4, a lifting device comprises a deck plate 1, a transition plate 2 and a lifting mechanism, wherein the deck plate 1 and the transition plate 2 are connected by the lifting mechanism;

the lifting mechanism comprises a roller assembly 43, a wedge block 44 and a lifting drive 45, wherein the lifting drive 45 is connected with the wedge block 44 and used for driving the wedge block 44 to move forwards or backwards, the roller assembly 43 is connected to the lower surface of the transition plate 2, rollers of the roller assembly 43 are matched with inclined surfaces of the wedge block 44, and the transition plate 2 rises or falls along with the advancing or retreating of the wedge block 44.

Through implementation of the technical scheme, the deck plate 1 is fixed, the transition plate 2 is connected with the deck plate 1 through the lifting mechanism, and the lifting mechanism can drive the transition plate 2 to lift or descend when the lifting mechanism lifts or descends.

The roller assembly 43 rolls on the inclined plane of the wedge-shaped block 44 to realize the lifting function of the transition plate 2, so that rolling friction is generated between the roller assembly 43 and the wedge-shaped block 44 in the lifting process of the transition plate 2, the contact surface between the roller assembly 43 and the wedge-shaped block 44 is small when relative movement is generated, and when the roller assembly 43 reciprocates on the wedge-shaped block 44, the heat dissipation function can be rapidly realized at the part which does not contact, so that the roller assembly 43 and the wedge-shaped block 44 are matched, the heating problem is not generated, and the transition plate 2 can continuously lift.

In this embodiment, preferably, the sliding rail 11 is provided on the deck plate 1, the first mounting plate 441 is connected to the lower end surface of the wedge block 44, the sliding block 442 is provided on the lower surface of the first mounting plate 441, and the sliding rail 11 cooperates with the sliding block 442.

The wedge block 44 is matched with the slide rail 11 through the sliding block 442 to realize free movement in the horizontal direction, and the sliding block 442 and the slide rail 11 enable the movement of the wedge block 44 in the horizontal direction to be smoother in forward or backward movement.

In this embodiment, it is preferable that the first mounting plate 441 is provided with a first waiting position 443, and the transition plate 2 is at the lowest position when the roller assemblies 43 are engaged with the first waiting position 443.

The first waiting position 443 is connected to the lowest part of the inclined surface of the wedge block 44, and when the roller assembly 43 is located at the first waiting position 443, the transition plate 2 is located at the lowest position, and no relative force exists between the wedge block 44 and the roller assembly 43.

When the lift drive 45 starts pushing the wedge 44, the roller assembly 43 will start climbing along the incline of the wedge 44, while the transition plate 2 starts rising until the maximum travel of the lift drive 45 is reached or the highest point of the wedge 44 is reached.

In this embodiment, the upper end of the wedge block 44 is preferably provided with a second waiting position 444, and the transition plate 2 is at the highest position when the roller assembly 43 is engaged with the second waiting position 444.

The roller assembly 43 will roll up the incline of the wedge 44 until it reaches its highest point. A second waiting position 444 is arranged at the highest point of the wedge-shaped block 44, when the roller assembly 43 passes over the highest point and enters the area of the second waiting position 444, the area of the second waiting position 444 horizontally extends, and therefore the extending action of the lifting drive 45 does not lead to the lifting of the transition plate 2 any more, and the height of the wedge-shaped block 44 determines the lifting height of the transition plate 2, so that when the same lifting drive 45 is used, the inclined surface of the wedge-shaped block 44 is longer, and the lifting speed of the transition plate 2 is slower.

In this embodiment, preferably, a plurality of guide bars 41 are detachably provided on the lower surface of the transition plate 2, a plurality of guide sleeves 42 are provided on the upper surface of the deck plate 1 in one-to-one correspondence with the guide bars 41, and a through hole is provided on the deck plate 1 coaxially with the guide sleeves 42, through which the guide bars 41 can protrude.

The guide rod 41 cooperates with the guide sleeve 42 to guide the lifting movement of the transition plate 2, so that the transition plate 2 has only a degree of freedom of lifting in the height direction. While the guide rod 41 and the guide sleeve 42 play a guiding role, the lifting drive 45 pushes the wedge block 44 to move forwards, the roller assembly 43 rolls upwards along the inclined plane of the wedge block 44, and the transition plate 2 is lifted vertically under the combined action of the roller assembly 43 and the guide.

The cooperation of a plurality of guide rods 41 and a guide sleeve 42 can realize effective guide to the transition plate 2, and deflection or deviation in the lifting process of the transition plate 2 is avoided.

By providing the through holes, the distance between the transition plate 2 and the deck plate 1 can be shortened, so that the structure of the lifting mechanism is more compact. The guide bar 41 extends through the through hole to below the deck plate 1 when the transition plate 2 is at the lowest position, and the guide bar 41 moves upward together with the transition plate 2 when the transition plate 2 is at the highest position, but the lower part of the guide bar 41 still needs to be located in the guide bush 42.

In this embodiment, preferably, the table top 1 is provided with a lifting state detecting bracket 12, and the lifting state detecting bracket 12 is provided with a lifting in-place sensor 13 and a lifting in-situ sensor 14.

The lift in place sensor 13 and the lift home sensor 14 may be provided as proximity switches that sense and signal when the edge of the transition plate 2 approaches.

The lifting in-place sensor 13 can detect whether the transition plate 2 is lifted in place, and when the transition plate 2 is lifted to the position of the lifting in-place sensor 13, the lifting in-place sensor 13 sends a signal, and the control system receives the signal and regards that the transition plate 2 is lifted in place, so that the next action can be performed.

Likewise, the lifting in-situ sensor 14 is capable of detecting whether the transition plate 2 has been lowered into position, and when the transition plate 2 has been lowered to the position of the lifting in-situ sensor 14, the lifting in-situ sensor 14 sends a signal, and when the signal is received, the transition plate 2 is regarded as being lowered into position, and the next action can be performed.

The lifting in-place sensor 13 and the lifting in-situ sensor 14 can also be used for judging the position of the transition plate 2, and before reaching a certain station, the actual position of the transition plate 2 is detected, and then the detection result is compared with the actual requirement to judge whether the position state of the transition plate 2 meets the requirement of the station.

In this embodiment, preferably, the lifting device further includes a lifting plate 3 and a swing mechanism, the lifting plate 3 being connected to the transition plate 2 by the swing mechanism;

the slewing mechanism comprises a driving piece 51, a slewing support 52 and a transmission flange seat 53, the slewing support 52 is connected with the transition plate 2 and the lifting plate 3, a first slewing hole is formed in the transition plate 2, and a slewing shaft of the driving piece 51 penetrates through the first slewing hole and is connected with the lifting plate 3 through the transmission flange seat 53.

The lifting plate 3 is connected with the transition plate 2 through the slewing mechanism, and along with the rising or falling of the transition plate 2, the lifting plate 3 can also rise or fall along with the transition plate 2, so that under the action of the lifting mechanism, the lifting plate 3 can rise or fall through the transition plate 2.

The driving member 51 is used to drive the transmission flange seat 53 to rotate, and the transmission flange seat 53 is connected with the lifting plate 3, so that the lifting plate 3 is driven to rotate when the driving member 51 rotates. The driving member 51 is fixedly connected to the transition plate 2 and can be lifted and lowered along with the transition plate 2.

The slewing bearing 52 is a bearing, the inner ring is connected with the transition plate 2, the outer ring is connected with the lifting plate 3, and the transition plate 2 is not affected when the lifting plate 3 rotates. The lifting function can be completed at the same time.

In this embodiment, preferably, the transition plate 2 is provided with a limiter 22, and the lower end surface of the lifting plate 3 is connected with a collision block 31 matched with the limiter 22;

the transition plate 2 is also provided with a bump detection switch 23, and the bump detection switch 23 is used for detecting whether the bump 31 is in position or not.

The driving member 51 can use a cylinder to directly push a rack, a rack driving gear forms a rack-and-pinion rotary mechanism to drive the lifting plate 3 to rotate, preferably, a rotary cylinder can be used to drive the lifting plate 3 to rotate, and compared with the rotary mechanism adopting the rack-and-pinion rotary mechanism, the rotary cylinder driving has the characteristics of compact mechanism and small space occupation ratio due to the fact that the rack-and-pinion mechanism is omitted; the rotary cylinder is selected and has good replacement performance, and can be directly replaced by a servo motor or a gear motor for driving according to the requirement.

Preferably, since the control accuracy of the rotation angle using the revolving cylinder is poor, when the rotation angle needs to be precisely controlled, it can be achieved by providing the stopper 22. The limiter 22 is arranged on the transition plate 2, the lower end face of the lifting plate 3 is connected with the collision block 31 matched with the limiter 22, the travel of the revolving cylinder is set to be larger than a required angle, the revolving cylinder drives the lifting plate 3 to rotate until the collision block 31 collides with the limiter 22, the lifting plate 3 stops rotating, at the moment, the collision block detection switch 23 can detect the collision block 31 and then gives out a signal, and the signal is used for controlling the revolving cylinder to stop air inlet, so that the continuous pushing of the collision block 31 to the limiter 22 is avoided, and the accuracy and the service life of the limiter 22 are influenced.

Due to factors such as different process requirements, when the lifting plate 3 is in different stations and different products are produced, the rotation angles are different, so that a plurality of limiters 22 can be arranged on the transition plate 2 as required, two limiters 22 can be arranged on the same circumference, and the two limiters 22 can be respectively collided by the collision block 31 by controlling the driving piece 51 to rotate forwards or reversely.

When more limit positions are needed, other limiters 22 can be arranged on other circumferences of the transition plate 2, interference with the limiters 22 arranged in the transition plate can be avoided, and the collision blocks 31 are correspondingly arranged on the lifting plate 3.

In this embodiment, preferably, a plurality of support blocks 32 are provided on the lifting plate 3, and two of the plurality of support blocks 32 are provided along a diagonal line of the lifting plate 3;

two pallet leveling devices are provided on the transition plate 2, and correspond to two support blocks 32 provided along a diagonal line.

The plurality of support blocks 32 can realize support for the tray placed thereon.

In production, the trays are required to be in a horizontal state, so that the transition plate 2 is also provided with horizontal detection of the trays. Two tray leveling devices are diagonally arranged, when the tray inclines, one tray leveling device can be subjected to larger pressure, and the other tray leveling device can be subjected to smaller pressure. Whether the tray is leveled or not can be judged by comparing the stress conditions of the two tray leveling devices.

In this embodiment, preferably, the tray leveling device includes a travel switch 24, a detection spring 25 and a guide sleeve 26, the detection spring 25 is sleeved in the guide sleeve 26, the detection end of the travel switch 24 is not lower than the upper end surface of the guide sleeve 26, and the upper end of the detection spring 25 exceeds the travel switch 24.

When the tray is placed on the supporting block 32, if the tray is positioned horizontally, the two detecting springs 25 are subjected to the same amount of pressure and the same amount of shrinkage deformation is generated. Both travel switches 24 will act to signal. If the tray is inclined, the lower tray will apply pressure to the detection spring 25 below the tray, so that the detection spring 25 is compressed and contracted, and the lifting plate 3 contacts the travel switch 24 below the tray, and then the travel switch 24 acts to send out a signal; and the amount of contraction of the detection spring 25 located under the tray of the high-level portion is small, the lifting plate 3 does not contact the lower travel switch 24, and the travel switch 24 does not act. One of the two travel switches 24 has a signal and the other has no signal, the control system will alert the tray to the need for readjustment until both travel switches 24 signal that the tray is ready for the next step.

The preferred embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present utility model within the scope of the technical concept of the present utility model, and all the simple modifications belong to the protection scope of the present utility model.

In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further.

Moreover, any combination of the various embodiments of the utility model can be made without departing from the spirit of the utility model, which should also be considered as disclosed herein.

Claims (10)

1. The lifting device is characterized by comprising a table panel (1), a transition plate (2) and a lifting mechanism, wherein the table panel (1) and the transition plate (2) are connected through the lifting mechanism;

the lifting mechanism comprises a roller assembly (43), a wedge block (44) and a lifting drive (45), wherein the lifting drive (45) is connected with the wedge block (44) to drive the wedge block (44) to advance or retreat, the roller assembly (43) is connected to the lower surface of the transition plate (2), rollers of the roller assembly (43) are matched with inclined planes of the wedge block (44), and the transition plate (2) rises or descends along with the advance or retreat of the wedge block (44).

2. Lifting device according to claim 1, characterized in that the deck plate (1) is provided with a sliding rail (11), the lower end surface of the wedge block (44) is connected with a first mounting plate (441), the lower surface of the first mounting plate (441) is provided with a sliding block (442), and the sliding rail (11) is matched with the sliding block (442).

3. Lifting device according to claim 2, characterized in that the first mounting plate (441) is provided with a first waiting position (443), and that the transition plate (2) is at its lowest position when the roller assembly (43) cooperates with the first waiting position (443).

4. A lifting device according to claim 3, characterized in that the upper end of the wedge-shaped block (44) is provided with a second waiting position (444), and that the transition plate (2) is in its highest position when the roller assembly (43) cooperates with the second waiting position (444).

5. Lifting device according to claim 1, characterized in that the lower surface of the transition plate (2) is detachably provided with a plurality of guide bars (41), the upper surface of the table plate (1) is provided with a plurality of guide sleeves (42) corresponding to the guide bars (41) one by one, the table plate (1) is coaxially provided with the guide sleeves (42) with through holes, and the guide bars (41) can extend out of the through holes.

6. Lifting device according to claim 1, characterized in that a lifting state detection bracket (12) is arranged on the deck plate (1), and a lifting in-place sensor (13) and a lifting in-situ sensor (14) are arranged on the lifting state detection bracket (12).

7. Lifting device according to any one of claims 1-6, characterized in that the lifting device further comprises a lifting plate (3) and a swivel mechanism, by means of which swivel mechanism the lifting plate (3) is connected to the transition plate (2);

the rotary mechanism comprises a driving piece (51), a rotary support (52) and a transmission flange seat (53), the rotary support (52) is connected with the transition plate (2) and the lifting plate (3), a first rotary hole is formed in the transition plate (2), and a rotary shaft of the driving piece (51) penetrates out of the first rotary hole and is connected with the lifting plate (3) through the transmission flange seat (53).

8. Lifting device according to claim 7, characterized in that the transition plate (2) is provided with a stopper (22), the lower end surface of the lifting plate (3) is connected with a bump (31) cooperating with the stopper (22);

the transition plate (2) is also provided with a collision block detection switch (23), and the collision block detection switch (23) is used for detecting whether the collision block (31) is in place or not.

9. Lifting device according to claim 7, characterized in that the lifting plate (3) is provided with a plurality of support blocks (32), two of the plurality of support blocks (32) being arranged along a diagonal of the lifting plate (3);

two tray leveling devices are arranged on the transition plate (2), and the two tray leveling devices correspond to the two supporting blocks (32) arranged along the diagonal line.

10. Lifting device according to claim 9, characterized in that the tray leveling device comprises a travel switch (24), a detection spring (25) and a guide sleeve (26), wherein the detection spring (25) is sleeved in the guide sleeve (26), the detection end of the travel switch (24) is not lower than the upper end surface of the guide sleeve (26), and the upper end of the detection spring (25) exceeds the travel switch (24).