CN114179429A

CN114179429A - Slide block anti-falling locking device of press machine

Info

Publication number: CN114179429A
Application number: CN202111486234.8A
Authority: CN
Inventors: 潘祺钦; 李娜; 王菡杰; 包松东; 张文
Original assignee: CHIN FONG (CHINA) MACHINE INDUSTRY CO LTD
Current assignee: CHIN FONG (CHINA) MACHINE INDUSTRY CO LTD
Priority date: 2021-12-07
Filing date: 2021-12-07
Publication date: 2022-03-15

Abstract

The invention discloses a slide block anti-falling locking device of a press machine, which is characterized by comprising a lock tongue and a rack, wherein the lock tongue is arranged on a stand column of a frame of the press machine, a lock tongue driving mechanism and a lock tongue position detection mechanism are arranged on the stand column of the frame, the rack is arranged on the side surface of a slide block and is in up-and-down sliding fit with the slide block, a rack elastic supporting mechanism is arranged on the slide block, and when the lock tongue driving mechanism drives the lock tongue to be inserted into the rack, the slide block is locked; the locking device has the advantages that the locking device locks the sliding block in an anti-falling mode through the matching of the lock tongue and the rack, and when the sliding block stops at different height positions, the sliding block can be locked to play a role in safety without being limited to the top dead center position of the sliding block; and the length of the rack can be changed to adapt to different stroke lengths and die height adjustment amounts of the press machine.

Description

Slide block anti-falling locking device of press machine

Technical Field

The invention relates to a press machine, in particular to a slide block anti-falling locking device of the press machine.

Background

Among the current press, all be provided with the safeties that prevent that the slider accident from dropping when stopping from appearing, and this safeties adopts cylinder bolt formula slider anti-falling device at present basically, and concrete structure is: the air cylinder is fixedly arranged on the rack, the bolt is fixedly connected to a piston rod of the air cylinder, the limiting block is fixedly arranged on the sliding block, and the bolt is driven to insert or move out of a pin hole of the limiting block through actuation of the air cylinder to lock or unlock the sliding block. However, the anti-falling device has the following defects in the actual use process: 1. the locking position of the device is limited and can not be selected, and the locking is usually carried out when the slide block is positioned at the position of the upper dead point, so that the inconvenience is brought to the maintenance and repair of the press or the repair of the die on the press; 2. the pin holes on the limiting blocks are waist-shaped holes so as to adapt to different mold closing heights, the bolts are inserted into the waist-shaped holes of the limiting blocks during locking, gaps between the bolts and the waist-shaped holes change along with the change of the mold closing heights, and the larger the gap is, the larger the slide block dropping amount is, so that potential safety hazards exist; 3. the anti-falling device is free of a buffer piece, and once the sliding block falls to have a large impact load, the sliding block and the associated piece are damaged; 4. the feedback of the bolt position is generally obtained by indirect feedback through magnetic detection of the position of the piston of the air cylinder, and certain false detection exists.

Disclosure of Invention

The invention aims to solve the technical problem of providing a slide block anti-falling locking device of a press machine, which can lock a slide block to play a role in safety when the slide block stops at different height positions and is safe and reliable to lock.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a locking device is prevented weighing down by slider of press, includes spring bolt and rack, the spring bolt setting on the frame stand of press, the frame stand on be provided with spring bolt actuating mechanism and spring bolt position detection mechanism, the rack set up in the side of slider and with the slider about sliding fit, the slider on be provided with rack elastic support mechanism, work as spring bolt actuating mechanism drive the spring bolt insert the rack during, the slider locked.

Further, the spring bolt actuating mechanism include cylinder, L type connecting rod and straight connecting rod, the cylinder fix the frame stand on, the one end of L type connecting rod with the tip of the piston rod of cylinder articulated mutually, the other end of L type connecting rod with the spring bolt articulated mutually, the one end of straight connecting rod with the turning department of L type connecting rod articulated mutually, the other end of straight connecting rod with the frame stand articulated mutually, the frame stand on fixedly be provided with the spring bolt sliding seat, the spring bolt pass the spring bolt sliding seat and rather than horizontal sliding fit.

Furthermore, a limit block is fixedly arranged on the stand column of the frame, and when the L-shaped connecting rod is contacted with the limit block, three points of a hinge point of the L-shaped connecting rod and the lock tongue, a hinge point of the straight connecting rod and the L-shaped connecting rod, and a hinge point of the straight connecting rod and the stand column are positioned on the same straight line, so that the L-shaped connecting rod and the straight connecting rod are in a self-locking state.

Furthermore, the lock tongue position detection mechanism comprises a first proximity switch and a second proximity switch which are fixed on the lock tongue sliding seat, the first proximity switch and the second proximity switch are staggered from front to back, a first detection hole and a second detection hole which are opposite up and down are arranged on the lock tongue, when the lock tongue extends into the rack to enable the sliding block to be in a locking state, the first proximity switch is opposite to the first detection hole to cut off a signal, and the second proximity switch is staggered from the second detection hole to cut on the signal; when the bolt retracts to enable the sliding block to be in an unlocking state, the first proximity switch and the first detection hole are staggered to switch on a signal, and the second proximity switch and the second detection hole are opposite to each other to switch off the signal.

Furthermore, the upper end face of the front end of the lock tongue is a horizontal plane, the lower end face of the front end of the lock tongue is an inclined plane, and the lower end faces of the teeth of the rack are horizontal planes.

Further, the side of slider fixed be provided with the rack mount pad, the rack setting be in the rack mount pad in and rather than upper and lower sliding fit, rack elastic support mechanism include spring, guide arm and spring support seat, the spring support seat fix the side of slider, the guide arm upwards pass the spring support seat, just the upper end of guide arm with the lower extreme fixed connection of rack, the lower extreme spiro union of guide arm have a stop nut, the spring housing on the guide arm, just the both ends of spring support respectively the lower terminal surface of rack with the spring support seat between.

Furthermore, a buffer block is fixedly arranged on the side face of the sliding block and located above the rack, and the vertical sliding distance of the rack between the buffer block and the spring supporting seat is one tooth height of the rack.

Compared with the prior art, the invention has the advantages that:

1. the locking device locks the sliding block in an anti-falling mode through the matching of the lock tongue and the rack, and when the sliding block stops at different height positions, the sliding block can be locked to play a role in safety without being limited to the top dead center position of the sliding block; the length of the rack is changed to adapt to different stroke lengths and die height adjustment amounts of the press machine;

2. the sliding block is provided with the rack elastic supporting mechanism, so that the rack can float up and down through the lifting of the spring, the bolt can be ensured to be smoothly inserted into the tooth groove of the rack, the resistance of the dead weight of the rack to the insertion and the withdrawal of the bolt is reduced, and the bolt and the rack can be flexibly and smoothly matched;

3. the air cylinder drives the lock tongue through the matching of the L-shaped connecting rod and the straight connecting rod, and the matching of the L-shaped connecting rod and the straight connecting rod forms a multi-connecting-rod toggle mechanism, so that the thrust of the air cylinder is increased through the toggle mechanism and then acts on the lock tongue, and the toggle mechanism slowly enters and quickly returns during actuation (the lock tongue is gradually slow when being inserted and locked and is gradually fast when being withdrawn and unlocked), so that the collision can be relieved when the lock tongue is slowly inserted, and the action time can be shortened when the lock tongue is quickly withdrawn;

4. the bolt position detection mechanism detects through the interactive mode of first proximity switch and second proximity switch, and the locking state: a second proximity switch on signal, a first proximity switch off signal; an unlocking state: the second proximity switch is used for switching off signals, the first proximity switch is used for switching on signals, and only two proximity switch signals are correct at the same time, the subsequent actions of the cylinder and the sliding block can be carried out, so that misoperation is avoided;

5. be provided with the buffer block on the slider, when the slider accident fell, the buffer block can the active absorption impact load, avoids the part damage.

Drawings

FIG. 1 is a schematic view of the present invention mounted on a frame column and a slide block of a press;

FIG. 2 is a schematic structural view of the present invention in a slider locked state;

FIG. 3 is a right side view of FIG. 2;

FIG. 4 is a schematic structural view of the present invention in a slider unlocked state;

FIG. 5 is a schematic view of the position detection mechanism of the locking bolt of the present invention when the locking bolt is locked;

fig. 6 is a schematic view of the lock tongue position detecting mechanism of the present invention when the lock tongue is unlocked.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in the figure, a slide block anti-falling locking device of a press machine comprises a lock tongue 1 and a rack 2, the lock tongue is arranged on a stand column 3 of the press machine, a lock tongue driving mechanism and a lock tongue position detection mechanism are arranged on the stand column 3, the lock tongue driving mechanism comprises an air cylinder 4, an L-shaped connecting rod 5 and a straight connecting rod 6, the air cylinder 4 is fixed on the stand column 3, one end of the L-shaped connecting rod 5 is hinged with the end part of a piston rod of the air cylinder 4, the other end of the L-shaped connecting rod 5 is hinged with the rear end of the lock tongue 1, one end of the straight connecting rod 6 is hinged with the turning part of the L-shaped connecting rod 5, the other end of the straight connecting rod 6 is hinged with the stand column 3, a lock tongue sliding seat 31 is fixedly arranged on the stand column 3, the lock tongue 1 passes through the lock tongue sliding seat 31 and is in horizontal sliding fit with the lock tongue sliding seat, a limit block 32 is fixedly arranged on the stand column 3, when the L-shaped connecting rod 5 is contacted with the limit block 32, three points of a hinge point of the L-shaped connecting rod 5 and the bolt 1, a hinge point of the straight connecting rod 6 and the L-shaped connecting rod 5 and a hinge point of the straight connecting rod 6 and the stand column 3 of the frame are positioned on the same straight line, so that the L-shaped connecting rod 5 and the straight connecting rod 6 are in a self-locking state; the bolt position detection mechanism comprises a first proximity switch 33 and a second proximity switch 34 which are fixed on a bolt sliding seat 31, the first proximity switch 33 and the second proximity switch 34 are staggered front and back, a first detection hole 11 and a second detection hole 12 which are opposite up and down are arranged on a bolt 1, a rack mounting seat 71 is fixedly arranged on the side surface of a sliding block 7, a rack 2 is arranged in the rack mounting seat 71 and is in up and down sliding fit with the rack mounting seat, the upper end surface of the front end of the bolt 1 is a horizontal plane, the lower end surface of the front end is an inclined plane, and the lower end surfaces of teeth of the rack 2 are horizontal planes; when the bolt 1 retracts to enable the sliding block 7 to be in an unlocking state, the first proximity switch 33 is staggered with the first detection hole 11 to switch on a signal, and the second proximity switch 34 is opposite to the second detection hole 12 to switch off the signal;

be provided with rack elastic support mechanism on slider 7, rack elastic support mechanism includes spring 8, guide arm 9 and spring support seat 10, spring support seat 10 is fixed in the side of slider 7, guide arm 9 upwards passes spring support seat 10, and the upper end of guide arm 9 and the lower extreme fixed connection of rack 2, the lower extreme spiro union of guide arm 9 has stop nut 91, spring 8 overlaps on guide arm 9, and the both ends of spring 8 support respectively between the lower terminal surface of rack 2 and spring support seat 10, the fixed buffer block 72 that is provided with in side of slider 7, buffer block 72 is located the top of rack 2, rack 2 is a tooth height for rack 2 at the upper and lower sliding distance between buffer block 72 and spring support seat 10.

In the above embodiment, the locking process of the slider anti-falling locking device is as follows: after the sliding block 7 stops moving, the cylinder 4 is controlled to drive the L-shaped connecting rod 5 and the straight connecting rod 6 downwards, the L-shaped connecting rod 5 pushes the bolt 1 to move towards the direction of the rack 2, the bolt 1 can be smoothly inserted into the rack 2 due to the fact that the lower end face of the front end of the bolt 1 is an inclined face, the sliding block 7 is locked, when the L-shaped connecting rod 5 is in contact with the limiting block 32, three points of a hinge point of the L-shaped connecting rod 5 and the bolt 1, a hinge point of the straight connecting rod 6 and the L-shaped connecting rod 5 and a hinge point of the straight connecting rod 6 and the stand column 3 of the rack are located on the same straight line, at the moment, the L-shaped connecting rod 5 and the straight connecting rod 6 form a self-locking dead point, reaction force of the self-locking dead point on the cylinder 4 is zero, reliability of locking of the sliding block is guaranteed, the first proximity switch 33 is opposite to the first detection hole 11 to turn off a signal, and the second proximity switch 34 is staggered with the second detection hole 12 to turn on a signal; when the sliding block 7 needs to be unlocked, the control cylinder 4 drives the L-shaped connecting rod 5 and the straight connecting rod 6 upwards, the L-shaped connecting rod 5 drives the bolt 1 to return to the bolt sliding seat 31, when the bolt 1 returns to the right position, the first proximity switch 33 and the first detection hole 11 are staggered to switch on a signal, and the second proximity switch 34 and the second detection hole 12 are opposite to each other to switch off the signal.

The scope of the present invention includes, but is not limited to, the above embodiments, and the scope of the present invention is defined by the appended claims, and any substitutions, modifications, and improvements that may occur to those skilled in the art are intended to fall within the scope of the present invention.

Claims

1. The utility model provides a locking device is prevented weighing down by slider of press, its characterized in that includes spring bolt and rack, the spring bolt setting on the frame stand of press, the frame stand on be provided with spring bolt actuating mechanism and spring bolt position detection mechanism, the rack set up in the side of slider and with the slider about sliding fit, the slider on be provided with rack elastic support mechanism, work as spring bolt actuating mechanism drive the spring bolt insert the rack during, the slider locked.

2. The slide fall arrest locking arrangement for presses of claim 1, further characterized by: the spring bolt actuating mechanism include cylinder, L type connecting rod and straight connecting rod, the cylinder fix the frame stand on, the one end of L type connecting rod with the tip of the piston rod of cylinder articulated mutually, the other end of L type connecting rod with the spring bolt articulated mutually, the one end of straight connecting rod with the turn department of L type connecting rod articulated mutually, the other end of straight connecting rod with the frame stand articulated mutually, the frame stand on fixedly be provided with the spring bolt sliding seat, the spring bolt pass the spring bolt sliding seat and rather than horizontal sliding fit.

3. The slide fall arrest locking arrangement for presses of claim 2, further characterized by: the frame stand column is fixedly provided with a limiting block, when the L-shaped connecting rod is in contact with the limiting block, three points of a hinge point of the L-shaped connecting rod and the spring bolt, a hinge point of the straight connecting rod and the L-shaped connecting rod, and a hinge point of the straight connecting rod and the frame stand column are positioned on the same straight line, so that the L-shaped connecting rod and the straight connecting rod are in a self-locking state.

4. The slide fall arrest locking arrangement for presses of claim 2, further characterized by: the lock tongue position detection mechanism comprises a first proximity switch and a second proximity switch which are fixed on the lock tongue sliding seat, the first proximity switch and the second proximity switch are staggered front and back, a first detection hole and a second detection hole which are opposite up and down are arranged on the lock tongue, when the lock tongue extends into the rack to enable the sliding block to be in a locking state, the first proximity switch is opposite to the first detection hole to cut off a signal, and the second proximity switch is staggered with the second detection hole to cut on the signal; when the bolt retracts to enable the sliding block to be in an unlocking state, the first proximity switch and the first detection hole are staggered to switch on a signal, and the second proximity switch and the second detection hole are opposite to each other to switch off the signal.

5. The slide fall arrest locking arrangement for presses of claim 1, further characterized by: the upper end face of the front end of the lock tongue is a horizontal plane, the lower end face of the front end of the lock tongue is an inclined plane, and the lower end face of the teeth of the rack is a horizontal plane.

6. The slide fall arrest locking arrangement for presses of claim 1, further characterized by: the side of slider fixed be provided with the rack mount pad, the rack setting be in the rack mount pad in and rather than upper and lower sliding fit, rack elastic support mechanism include spring, guide arm and spring support seat, the spring support seat fix the side of slider, the guide arm upwards pass the spring support seat, just the upper end of guide arm with the lower extreme fixed connection of rack, the lower extreme spiro union of guide arm have a stop nut, the spring housing the guide arm on, just the both ends of spring support respectively the lower terminal surface of rack with the spring support seat between.

7. The slide fall arrest locking arrangement for presses of claim 6, further characterized by: the side of the sliding block is fixedly provided with a buffer block, the buffer block is positioned above the rack, and the vertical sliding distance between the buffer block and the spring supporting seat of the rack is one tooth height of the rack.