CN110733878A - A workpiece stopper - Google Patents

Abstract

The invention relates to a workpiece stopper, comprising a base, a guide rail arranged on the base, an installation base plate slidably arranged on the guide rail, a blocking head mechanism arranged on the installation base plate, and an elastic buffer mechanism arranged between the base and the installation base plate . Compared with the prior art, the workpiece blocker plays a buffering role through a slidingly arranged mounting base plate and a buffer spring, which reduces or avoids noise and damage to the blocker caused by the collision between the workpiece and the blocker, thereby improving the performance of the workpiece blocker. The service life of the blocker; in addition, the workpiece blocker is provided with a front blocking head and a rear blocking head that are arranged in linkage, that is, when one blocking head is in the blocking state, the other blocking head is in the releasing state, and is blocked by the telescopic cylinder. The head switches alternately between the two states, thereby realizing intermittent blocking and release of workpieces.

Description

A workpiece stopper

technical field

The invention belongs to the technical field of automobile production, and relates to a workpiece stopper.

Background technique

The automobile production line mainly uses the blocker to make the moving workpiece stay at the designated station for processing. Most of the blockers currently used are hard contact blockers and non-linked blockers that lack buffer components or only use rubber pads for buffering. When the quality of the blocked workpiece is large or the speed is fast, the blocker and the workpiece will collide violently at the moment of contact, producing loud noise. If the impact is serious, the workpiece or the blocker may be damaged, resulting in an increase in the failure rate of operation. The service life is significantly shortened, or the fine parts that have been assembled on the workpiece are damaged, loosened or fallen off, which seriously affects the production quality and reduces the qualified rate of the product.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a workpiece stopper in order to overcome the above-mentioned defects of the prior art, which is used to reduce or avoid the noise or damage to the stopper caused by the impact between the workpiece and the stopper, and to pass the front and rear The linkage between the blocking heads realizes the intermittent blocking and release of the workpiece.

The object of the present invention can be realized through the following technical solutions:

A workpiece stopper, comprising a base, a guide rail, a mounting bottom plate, a blocking head mechanism and an elastic buffer mechanism;

the guide rail is arranged on the base;

The installation bottom plate is slidably arranged on the guide rail;

The blocking head mechanism is arranged on the installation bottom plate;

The elastic buffer mechanism is arranged between the base and the installation bottom plate.

The workpiece stopper can be installed under the continuously running conveyor line body with accumulation and release function. When the workpiece hits the blocking head mechanism, it can play a buffering role through the cooperation between the sliding installation bottom plate and the elastic buffer mechanism. .

Further, the base includes a front base and a rear base which are arranged side by side in front and back, the guide rails are respectively arranged on the front base and the rear base, and the mounting bottom plate is respectively arranged on the front base and the rear base. The rail slide connection.

Further, the workpiece stopper also includes a limit component, and the limit component includes a limit block that is respectively arranged on the front base or the rear base, and a limit block that is located at the bottom of the installation bottom plate and located at the corresponding limit block. between the limit bosses.

The front and rear sliding distance of the installation base plate is limited by the limit component to ensure that the maximum distance of the workpiece does not exceed the working range during operation.

Further, a buffer bump head is provided on the limit block, and the buffer bump head is selected from a polyurethane buffer bump head.

Further, the elastic buffer mechanism includes a connecting block arranged on the front base and the installation bottom plate in front and rear respectively, and a buffer spring arranged between the connecting blocks.

Further, the elastic buffering mechanism includes a connecting block arranged on the installation bottom plate and the rear base, respectively, and a buffer spring arranged between the connecting blocks.

When the workpiece hits the blocking head mechanism, the blocking head mechanism together with the workpiece will decelerate forward along the linear guide under the pulling force or thrust of the tension spring until it stops together, thereby avoiding hard contact between the workpiece and the blocking head mechanism The impact generates greater vibration and noise, which in turn increases the life of the stopper.

The tension of the buffer spring can be adjusted and replaced according to the weight of different workpieces, or the initial tension of the buffer spring can be adjusted by adjusting the relative position of the connection block on the base and the installation bottom plate, so as to adapt to the collinear production of different workpieces.

Further, the blocking head mechanism includes a front blocking head and a rear blocking head respectively arranged on the installation base plate in front and rear, a connecting rod arranged between the front blocking head and the rear blocking head, and a connecting rod drivingly connected with the connecting rod. Displacement driving components, and connecting pieces respectively arranged between the front end of the connecting rod and the front blocking head, and between the rear end of the connecting rod and the rear blocking head.

Through the forward and backward movement of the connecting rod, when one blocking head is in the release state, the other blocking head is in the blocking state, thereby ensuring that only one workpiece is released at a time.

Further, the front blocking head and the rear blocking head each include a blocking head base fixed on the installation bottom plate, a connecting plate hinged with the blocking head base, a baffle plate disposed on the connecting plate, and a connecting plate disposed on the connecting plate. A connecting piece with the connecting rod, the two ends of the connecting piece are respectively hinged with the connecting plate and the connecting rod.

When the connecting rod moves forward, the connecting rod pushes the connecting piece connected with the front blocking head, so that the connecting plate rotates forward and the baffle is erected to block the workpiece. At this time, the front blocking head is in the blocking state; at the same time, due to the connecting plate The rod moves forward, so that the lower end of the connecting piece on the rear blocking head is pulled forward, so that the connecting plate rotates in the reverse direction, the baffle moves down, and the workpiece loses its blocking, and the rear blocking head is in the release state at this time.

The baffle is provided with a polyurethane buffer layer.

Further, the displacement driving assembly includes a cylinder mounting seat fixed on the mounting base plate and a telescopic cylinder arranged on the cylinder mounting seat, and one end of the telescopic cylinder is connected to the connecting rod for transmission.

The displacement of the connecting rod is realized by the telescopic cylinder, and the conveying distance of the workpiece can be adjusted by setting the delay action time of the telescopic cylinder through the control system.

Further, the stopper also includes a position sensing block for detecting the position of the connecting rod. The position sensing block can use the common displacement sensors on the market, such as the proximity sensor and the sensing board used together, the sensing board is fixedly installed on the connecting rod, and the proximity sensors are provided with two, one behind the other. They are respectively installed on the installation bottom plate, corresponding to the position of the sensing plate when the front blocking head is in the blocking state or the release state, and the position of the connecting rod can be detected through the use of the proximity sensor and the sensing board, so as to cooperate with the blocking head mechanism to realize the workpiece. Block release in turn.

In the waiting state, the front blocking head is in the blocking state, the rear blocking head is in the releasing state, and the workpiece is blocked by the front blocking head and is in the stopping state; after receiving the release control command, the piston rod of the telescopic cylinder extends and the connecting rod moves , the front blocking head is dropped and the rear blocking head is raised, then the tray directly above the blocker moves forward with the conveying line body due to the removal of blocking. When the rear end of the workpiece runs away from the front blocking head, control the piston rod of the cylinder to retract, raise the front blocking head, and drop the rear blocking head, then the workpiece placed in the rear area moves forward with the conveyor line until it touches the front blocking head. The blocking head makes the front and rear blocking heads together with the workpiece to decelerate forward along the linear guide under the pulling force of the tension spring, until they stop together, and continue to keep the tray in a waiting state. This cycle is completed once, and a tray is released to the next. Location.

Compared with the prior art, the present invention has the following characteristics:

1) The workpiece blocker plays a buffering role through the sliding installation base plate and buffer spring, reducing or avoiding the noise and damage to the blocker caused by the collision between the workpiece and the blocker, thereby improving the use of the blocker. life;

2) The front blocking head and the rear blocking head in the workpiece blocker are set in linkage, so that when one blocking head is in the blocking state, the other blocking head is in the releasing state, and the blocking head alternates between the two states through the telescopic cylinder Switch, so as to achieve intermittent blocking and release of workpieces.

Description of drawings

1 is a schematic structural diagram of a workpiece stopper in the present invention;

2 is a front view of a workpiece stopper in the present invention;

3 is a top view of a workpiece stopper in the present invention;

4 is a front view of the workpiece stopper when the front blocking head blocks the workpiece in the present invention;

5 is a front view of a workpiece stopper in Embodiment 1;

FIG. 6 is a left cross-sectional view of a workpiece stopper in Embodiment 1;

FIG. 7 is an installation cross-sectional view of the position sensing block including the sensing sensor and the sensing plate

Description of marks in the figure:

1- Rear blocking head, 2- Rear base, 3- Seat tray, 4- Mounting bottom plate, 5- Front base, 6- Front blocking head, 7- Link, 8- Cylinder mount, 9- Position sensing block, 901-Induction board, 902-Proximity sensor, 903-Induction board mounting bracket, 904-Proximity sensor mounting bracket, 10-Buffer spring, 11-Telescopic cylinder, 12-Guide rail, 13-Connecting block, 14-Limiting block, 15 -Limiting boss, 16-connecting piece, 17-blocking head base, 18-connecting plate, 19-baffle plate, 20-speed chain body, 21-line body leg, 22-linear guide slider, 23- Buffer bump.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and provides a detailed implementation manner and a specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

Example 1:

As shown in FIG. 5 and FIG. 6 , a workpiece blocker is provided below the seat tray conveying line. The workpiece blocker includes a front base 5 and a rear base 2 , which are respectively installed on the front base 5 and the rear base 2 The guide rail 12 and the plurality of limit blocks 14, the installation base plate 4, the linear guide slider 22 located at the bottom of the installation base plate 4, the front blocking head 6 and the rear blocking head 1 disposed on the installation base plate 4, and the front blocking head 6 and the connecting rod 7 between the rear blocking head 1, the telescopic cylinder 11 drivingly connected with the connecting rod 7, the position sensing block 9 arranged on the connecting rod 7, and the 3 A buffer spring 10.

Both sides of the front base 5 and the rear base 2 are provided with wire body mounting plates along the horizontal direction. The wire body installation plates are provided with a double-speed chain body 20 , and the seat tray 3 is conveyed through the double-speed chain body 20 .

As shown in FIG. 5 , the front blocking head 6 is in a blocking state, the rear blocking head 1 is in a releasing state, and the seat tray 3 is blocked by the front blocking head 6 and is in a waiting state. After receiving the release control command, the piston rod of the telescopic cylinder 11 is extended, so that the front blocking head 6 falls and the rear blocking head 1 rises, then the seat tray 3 located directly above the blocker follows the double-speed chain due to the cancellation of blocking The wire body 20 moves forward. By setting the delayed action time of the telescopic cylinder 11, when the rear end of the seat tray 3 runs away from the front blocking head 6, the piston rod of the telescopic cylinder 11 is controlled to retract, the front blocking head 6 is raised, and the rear blocking head 1 When it falls, the seat tray 3 placed in the rear area moves forward together with the double-speed chain body 20 until it contacts the front blocking head 6, and makes the front blocking head 6 and the rear blocking head 1 together with the seat tray 3 in the buffer spring. Under the action of the pulling force of 10 , it moves forward along the linear guide 12 to decelerate together until it stops, and continues to keep the seat tray 3 in a waiting state, and so on. By means of the buffer spring 10 and the slidably arranged mounting bottom plate 4, the seat tray 3 is prevented from directly hitting the blocking head to generate large vibration and noise, thereby improving the service life of the blocker. The intermittent release of the seat tray 3 is completed by the cyclic operation of the workpiece stopper.

Example 2:

A workpiece stopper as shown in FIG. 1 , FIG. 2 , FIG. 3 and FIG. 4 includes a front base 5 and a rear base 2 , guide rails 12 respectively arranged on the front base 5 and the rear base 2 , and slidingly arranged on the guide rails 12 The installation base plate 4 on the upper part, the blocking head mechanism arranged on the installation base plate 4 , and the elastic buffer mechanism arranged between the base and the installation base plate 4 .

The bottom of the mounting base plate 4 is provided with a guide rail block 22 , which is slidably connected to the guide rails 12 provided on the front base 5 and the rear base 2 respectively through the guide rail block 22 .

The front base 5 and the rear base 2 are also provided with a plurality of limit blocks 14, and the bottom of the mounting base plate 4 is also provided with limit bosses 15, the limit bosses 15 are respectively arranged between the corresponding limit blocks 14 to limit the The block 14 is provided with a buffer bumper 23 made of polyurethane.

The elastic buffer mechanism includes connecting blocks 13 respectively disposed on the mounting base plate 4 and the rear base 2 and a buffer spring 10 disposed between the connecting blocks 13 . The pulling force of the buffer spring 10 can be adjusted and replaced according to the weight of different workpieces, or the initial pulling force of the buffer spring 10 can be adjusted by adjusting the relative positions of the base and the connecting blocks on the mounting base plate 4, thereby adapting to the collinear production of different workpieces.

The blocking head mechanism includes a front blocking head 6 and a rear blocking head 1 respectively disposed on the installation base plate 4 in front and rear, a connecting rod 7 arranged between the front blocking head 6 and the rear blocking head 1, and a transmission connection with the connecting rod 7 The displacement drive assembly, and the connecting pieces 16 are respectively provided between the front end of the connecting rod 7 and the front blocking head 6 and between the rear end of the connecting rod 7 and the rear blocking head 1 . The displacement drive assembly includes a cylinder mounting base 8 fixed on the mounting base 4 and a telescopic cylinder 11 set on the cylinder mounting base 8 .

Both the front blocking head 6 and the rear blocking head 1 include a blocking head base 17 fixed on the mounting base plate 4 , a pair of connecting plates 18 hinged to the blocking head base 17 , and a baffle plate fixedly connected with the pair of connecting plates 18 19 A connecting piece 16 is provided between the connecting plate 18 and the connecting rod 7 , one end of the connecting piece 16 is hinged with a pair of connecting plates 18 , and the other end of the connecting piece 16 is hinged with the connecting rod 7 .

The displacement of the connecting rod 7 is realized by the telescopic cylinder 11 , and the conveying distance of the workpiece can be adjusted by setting the delay time of the telescopic cylinder 11 .

As shown in FIG. 7 , the stopper further includes a position sensing block 9 for detecting the position of the connecting rod 7 , and the position sensing block 9 includes a proximity sensor 902 and a sensing plate 901 used together, wherein the sensing plate 901 is installed through the sensing plate The frame 903 is fixedly installed on the connecting rod 7, and there are two proximity sensors 902, which are respectively installed on the mounting base plate 4 through the corresponding proximity sensor mounting frames 904 in tandem, and are in a blocking state or release with the front blocking head 6 respectively. In the state, the position of the induction plate 901 corresponds to the position of the connecting rod 7 through the proximity sensor 902 and the induction plate 901, so as to cooperate with the blocking head mechanism to realize the sequential blocking and release of the workpiece.

Working principle: When the workpiece is in contact with the front blocking head 6 or the rear blocking head 1, due to the impact of the workpiece, it slides with the mounting base plate 4 along the guide rail 12, and under the pulling force of the buffer spring 10, decelerates until the Stop, reduce the impact of the workpiece on the blocking head through the buffer spring 10 and the sliding mounting base plate 4, thereby reducing the vibration and noise caused by the impact, and improving the service life of the workpiece blocker;

In addition, the workpiece blocker can also realize the intermittent release of workpieces. When the workpiece is blocked by the blocking head 6 and is in a waiting state, the baffle 19 of the front blocking head 6 is erected to be in a blocking state, and the baffle 19 of the rear blocking head 1 is lowered. In the release state, at this time, the connecting piece 16 hinged with the front blocking head 6 is in a vertical state, and the connecting piece 16 hinged with the rear blocking head 1 is in an inclined state;

When the workpiece needs to be released, the piston rod of the telescopic cylinder 11 is stretched out, which drives the connecting rod 7 to move backward, and then pulls the connecting piece 16 hinged with the front blocking head 6 to move backward, from the vertical state to the inclined state, so that the front The connecting plate 18 on the blocking head 6 rotates clockwise, thereby driving the baffle 19 on the front blocking head 6 to lower, so that the front blocking head 6 is in the release state; The connecting piece 16 moves forward and changes from the inclined state to the vertical state, so that the connecting plate 18 on the rear blocking head 1 rotates counterclockwise, thereby driving the baffle 19 on the rear blocking head 1 to lift up, so that the rear blocking head 1 is in the blocking position state to block the movement of the next workpiece until the previous workpiece completely leaves the front blocking head 6;

After that, the piston rod of the telescopic cylinder 11 retracts, the connecting rod 7 moves forward, the connecting plate 18 on the front blocking head 6 rotates counterclockwise, and the connecting plate 18 on the rear blocking head 1 rotates clockwise, so that the front blocking head 6 and the rear The blocking head 1 is in the blocking state and the release state, respectively, and the workpiece is blocked by the front blocking head 6 and is in a waiting state until the next release; the telescopic cylinder 11 drives the circular work of the connecting rod 7, so that the front blocking head 6 and the rear blocking head 1 is in the blocking state alternately, so as to realize the intermittent release of the workpiece.

Example 3:

The elastic buffer mechanism in this embodiment includes connecting blocks 13 respectively disposed on the front base 5 and the mounting bottom plate 4, and a buffer spring 10 disposed between the connecting blocks 13. The thrust of the buffer spring 10 reduces the impact of the workpiece on the blocking head. Function; the rest are the same as in Example 2.

The foregoing description of the embodiments is provided to facilitate understanding and use of the invention by those of ordinary skill in the art. It will be apparent to those skilled in the art that various modifications to these embodiments can be readily made, and the generic principles described herein can be applied to other embodiments without inventive step. Therefore, the present invention is not limited to the above-mentioned embodiments, and improvements and modifications made by those skilled in the art according to the disclosure of the present invention without departing from the scope of the present invention should all fall within the protection scope of the present invention.

Claims (10)

1. The workpiece stoppers are characterized by comprising a base, a guide rail (12), an installation base plate (4), a stopper head mechanism and an elastic buffer mechanism;

   the guide rail (12) is arranged on the base;

   the mounting bottom plate (4) is arranged on the guide rail (12) in a sliding manner;

   the blocking head mechanism is arranged on the mounting bottom plate (4);

   the elastic buffer mechanism is arranged between the base and the mounting bottom plate (4).
2. 2. The kinds of work stoppers of claim 1, wherein the base comprises a front base (5) and a rear base (2) juxtaposed behind front , the guide rails (12) are respectively disposed on the front base (5) and the rear base (2), and the mounting base (4) is slidably connected to the guide rails (12) disposed on the front base (5) and the rear base (2), respectively.
3. 3. kinds of work stoppers according to claim 2, characterized in that, the work stopper further comprises a spacing assembly, the spacing assembly comprises front and rear spacing blocks (14) respectively arranged on the front base (5) or the rear base (2) and spacing bosses (15) arranged at the bottom of the mounting base plate (4) and located between the corresponding spacing blocks (14).
4. 4. The workpiece stopper as claimed in claim 3, wherein the stopper (14) is provided with a buffer ram (23).
5. 5. The workpiece stopper as claimed in claim 2, wherein the resilient buffer mechanism includes connecting blocks (13) respectively provided on the front base (5) and the mounting base plate (4) after front and a buffer spring (10) provided between the connecting blocks (13).
6. 6. The workpiece stopper as claimed in claim 2, wherein the resilient buffer mechanism includes connecting blocks (13) respectively provided on the mounting base plate (4) and the rear base (2) at the front and rear ends of and a buffer spring (10) provided between the connecting blocks (13).
7. 7. The workpiece stopper as claimed in claim 1, wherein the blocker mechanism includes front front and rear blockers (6, 1) respectively disposed on the mounting plate (4), a link (7) disposed between the front blocker (6) and the rear blocker (1), and a displacement drive assembly drivingly connected to the link (7).
8. 8. kinds of work piece stoppers according to claim 7, characterized by that, the front stopper (6) and the rear stopper (1) each include a stopper base (17) fixed on the mounting base plate (4), a connecting plate (18) hinged with the stopper base (17), a baffle (19) arranged on the connecting plate (18), and a connecting member (16) arranged between the connecting plate (18) and the connecting rod (7), and both ends of the connecting member (16) are hinged with the connecting plate (18) and the connecting rod (7) respectively.
9. 9. The workpiece stopper as claimed in claim 7, wherein the displacement drive assembly comprises a cylinder mount (8) fixed to the mounting plate (4) and a telescopic cylinder (11) mounted to the cylinder mount (8), the end of the telescopic cylinder (11) is drivingly connected to the connecting rod (7).
10. 10. kinds of work stoppers according to claim 7, characterized in that the stopper further includes a position sensing block (9) for detecting the position of the link (7).

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