CN219636759U - Upper limiting device - Google Patents

Abstract

The utility model provides an upper limiting device, which is arranged on a suspension arm of a crane, wherein a cable of the crane is connected with the upper limiting device, the upper limiting device comprises a trigger assembly and a collision block assembly, the trigger assembly is arranged on the suspension arm, one end of the cable is connected with a winch on the crane, the other end of the cable passes through the trigger assembly and is connected with a lifting hook, and the collision block assembly is arranged on the cable between the lifting hook and the trigger assembly; the trigger assembly comprises a proximity switch, a mounting bracket, a switch mounting bracket, a trigger connecting plate and a trigger fixing plate; the proximity switch is triggered by arranging the trigger support, and a transition piece is formed between the collision block assembly and the proximity switch, so that the collision block assembly is not directly contacted with the proximity switch, and the proximity switch can be protected from being damaged by collision easily.

Description

Upper limiting device

Technical Field

The utility model relates to the technical field of crane limiting, in particular to an upper limiting device.

Background

The loop wheel machine is the machinery that is used for goods to hoist, loading and unloading, and generally all lift by crane the goods through the lifting hook in the loop wheel machine, thereby when lifting by crane the goods later in the motion in the sky, thereby the goods can receive the influence of other external environment and appear rocking the condition, and need stop the goods upward movement after the goods plays to a take the altitude to need go up spacing to the lifting hook, and generally set up the induction block on the lifting hook in the current last limit structure, then set up proximity switch on the davit, thereby control the loop wheel machine through the touch proximity switch of induction block and stop lifting by crane the goods.

For example, in the patent document with the chinese patent application number 202110708952.9 and the publication date 2021.08.20, an electric hoist is disclosed, which comprises a mounting seat and 2 motors fixed on the mounting seat, wherein the 2 motors are coaxially and oppositely arranged, the output shaft of each motor is connected with a speed reducer, and the output shafts of the two speed reducers are coaxially and fixedly connected with a winding drum; the upper end of the steel wire rope is fixed on the winding drum, and the lower end of the steel wire rope is provided with a lifting hook which is used for lifting a heavy object; the top of the mounting seat is provided with a hook which is used for being connected with carrier equipment; the power supply ports of the 2 motors are electrically connected with a main power supply in series in sequence, and a breaker is electrically connected at the main power supply in series; the remote controller is used for controlling the forward rotation, the reverse rotation and the stop of the motors, and the two motors synchronously act; this technical scheme easy dismounting adopts two motor drive, and it is better to balance the performance in the structure, matches and uses the circuit breaker, and when one of them motor breaks down, the circuit breaker cuts off the total power, and another motor then brakes automatically because of the outage, and factor of safety is high.

However, in the prior art of upper limit control similar to the scheme, the upper limit control is realized by directly controlling the switch by the collision signal of the sensing block, when the crane is used for retracting the cable, the sensing block directly collides with the proximity switch, so that the sensing part of the proximity switch is easily damaged after the number of collisions is more, and the triggering condition of the proximity switch is poor to influence the upper limit control.

Disclosure of Invention

The utility model aims to provide an upper limiting device, so that a collision block does not directly contact a proximity switch, thereby protecting the proximity switch from being damaged by collision.

In order to achieve the above purpose, the utility model provides an upper limiting device, which is arranged on a suspension arm of a crane, a cable of the crane is connected with the upper limiting device, the upper limiting device comprises a trigger component and a bump component, the trigger component is arranged on the suspension arm, one end of the cable is connected with a winch on the crane, the other end of the cable passes through the trigger component and is connected with a lifting hook, the bump component is arranged on the cable between the lifting hook and the trigger component, the trigger component comprises a proximity switch, a mounting bracket, a switch mounting bracket, a trigger connecting plate and a trigger fixing plate, the mounting bracket comprises a main bracket and a trigger bracket, the trigger bracket is arranged on the main bracket, and the main bracket is hinged on the suspension arm; the trigger bracket is provided with a trigger connecting plate, and the proximity switch is arranged on the suspension arm above the trigger bracket through a switch mounting frame; a trigger fixing plate is arranged on the trigger bracket, a trigger connecting plate is arranged on the induction part of the proximity switch, and the trigger connecting plate is connected with the trigger fixing plate; the other end of hawser passes trigger support and connects the lifting hook, the bump piece subassembly is located the hawser of trigger support below, proximity switch is connected with the winch electricity, is equipped with the spacing groove that sets up along trigger connecting plate length direction on the trigger connecting plate, is equipped with the gliding bolt along spacing groove length direction in the spacing groove, triggers fixed plate and bolted connection.

Above-mentioned structure, through setting up trigger assembly, when the collision piece subassembly bumps the trigger support, because the main support is articulated on the davit, consequently trigger support is driven upwards by the collision piece subassembly and swings, drive when triggering support upwards swings and trigger the fixed plate and upwards remove and then drive the induction site that trigger connecting plate triggered proximity switch, can make proximity switch control loop wheel machine stop lifting cable from this, trigger proximity switch through setting up the trigger support, form the transition piece between collision piece subassembly and proximity switch, thereby make collision piece subassembly not direct and proximity switch contact, thereby can protect proximity switch to be difficult to by the striking damage.

Further, the collision block assembly comprises an upper collision block, a buffer spring and a lower collision block, wherein the upper collision block is arranged at one end of the cable close to the trigger assembly in a sliding manner, the lower collision block is fixed at one end of the cable close to the lifting hook, and the buffer spring is movably arranged on the cable between the upper collision block and the lower collision block. Through setting up and crashing the piece under with, set up buffer spring simultaneously between crashing the piece under and crashing the piece, when the hawser is rising, crashing the piece under and driving buffer spring and upwards moving and supporting crashing the piece, and then drive crashing the piece and remove to the trigger assembly, after crashing the piece touching trigger support down, crashing the piece and can play the cushioning effect through buffer spring's effect when continuing to remove down.

Further, a through groove which is convenient for the cable to pass through the mounting bracket is arranged at the center of the mounting bracket. When the crane drives the cable to hoist goods, the cable can shake due to natural wind or the movement of the crane, so that the cable can swing in the through groove under the action of the through groove, and the problem that the triggering component can not block the cable can be guaranteed.

Further, the limiting assembly is arranged at one end, far away from the main support, of the triggering support, the limiting assembly comprises a limiting installation frame and a limiting plate, the limiting plate is fixed on the triggering support through the limiting installation frame, and the limiting plate is in contact connection with the suspension arm. The arrangement ensures that if the proximity switch has excessive signal delay, the upper collision block is not stopped in time and continues to lift, and the trigger bracket can not continue to lift on the suspension arm through the limiting plate, so that the proximity switch is completely damaged.

Further, a limiting groove arranged along the length direction of the triggering connecting plate is formed in the triggering connecting plate, a bolt sliding along the length direction of the limiting groove is arranged in the limiting groove, and the triggering fixing plate is connected with the bolt. From this setting, through the effect of spacing groove for trigger fixed plate has certain buffer distance when being driven to the direction that is close to the light and remove, thereby places trigger fixed plate and directly collide with proximity switch and cause the damage.

Further, the main support is an arc-shaped support.

The main support can be conveniently fixed on the suspension arm through the arrangement.

Drawings

Fig. 1 is a schematic view of the upper limiting device of the present utility model disposed on a boom.

Fig. 2 is a schematic structural view of the trigger assembly of the present utility model.

Fig. 3 is a side view of the trigger assembly of the present utility model.

Fig. 4 is an enlarged view at a in fig. 2.

Detailed Description

The utility model is described in further detail below with reference to the drawings and the detailed description.

As shown in fig. 1 to 4, an upper limiting device is arranged on a suspension arm 01 of a crane (not shown in the drawings), a cable 02 of the crane is connected with the upper limiting device, the upper limiting device comprises a trigger assembly 1 and a bump assembly 2, the trigger assembly 1 is arranged on the suspension arm 01, one end of the cable 02 is connected with a winch (not shown in the drawings) on the crane, the other end of the cable 02 passes through the trigger assembly 1 and is connected with a lifting hook 03, and the bump assembly 2 is arranged on the cable 02 between the lifting hook 03 and the trigger assembly 1.

As shown in fig. 2 to 4, the trigger assembly 1 comprises a proximity switch 11, a mounting bracket 12, a switch mounting bracket 13, a trigger connecting plate 14 and a trigger fixing plate 15, wherein the mounting bracket 12 comprises a main bracket 121 and a trigger bracket 122, the trigger bracket 122 is arranged on the main bracket 121, and the main bracket 121 is hinged on a suspension arm 01; the trigger bracket 122 is provided with a trigger connecting plate 14, and the proximity switch 11 is arranged on the suspension arm 01 above the trigger bracket 122 through a switch mounting frame 13; a trigger fixing plate 15 is arranged on the trigger bracket 122, a trigger connecting plate 14 is arranged on the sensing part of the proximity switch 11, and the trigger connecting plate 14 is connected with the trigger fixing plate 15; the other end of the cable 01 passes through the trigger support 122 and is connected with the lifting hook 03, the collision block assembly 2 is positioned on the cable 01 below the trigger support 122, the proximity switch 11 is electrically connected with the winch, and in this embodiment, the main support 121 is an arc-shaped support.

The trigger connecting plate 14 is provided with a limit groove 16 arranged along the length direction of the trigger connecting plate 14, a bolt 17 sliding along the length direction of the limit groove 16 is arranged in the limit groove 16, and the trigger fixing plate 15 is connected with the bolt 17. The trigger fixing plate 15 is driven to move towards the direction approaching to the switch 11 by the action of the limit groove 16, and a certain buffer distance is provided, so that the trigger fixing plate 15 is placed to collide with the proximity switch 11 directly to cause damage. According to the structure, when the collision block assembly 2 collides with the triggering support 122 through the triggering assembly 1, the main support 121 is hinged to the suspension arm 01, so that the triggering support 122 is driven to swing upwards by the collision block assembly 2, the triggering fixing plate 15 is driven to move upwards when the triggering support 122 swings upwards, and then the triggering connecting plate 14 is driven to trigger the sensing part of the proximity switch 11, so that the proximity switch 11 can control the crane to stop lifting the cable 02, the proximity switch 11 is triggered through the triggering support 122, a transition piece is formed between the collision block assembly 2 and the proximity switch 11, and the collision block assembly is not directly contacted with the proximity switch 11, so that the proximity switch 11 can be protected from being damaged easily due to collision.

As shown in fig. 1, the striker assembly 2 includes an upper striker 21, a buffer spring 22 and a lower striker 23, the upper striker 21 is slidably disposed at an end of the cable 02 near the trigger assembly 1, the lower striker 23 is fixed at an end of the cable 02 near the hook 03, and the buffer spring 22 is movably disposed on the cable 02 between the upper striker 21 and the lower striker 22. Through setting up upper crash block 21 and lower crash block 23, set up buffer spring 22 simultaneously between upper crash block 21 and lower crash block 23, when cable 02 is rising, lower crash block 23 drives buffer spring 22 and upwards moves and support upper crash block 21, and then drives upper crash block 21 and moves to trigger assembly 1, after upper crash block 21 touches trigger support 122, lower crash block 23 can play the cushioning effect through buffer spring 22's effect when continuing to move.

As shown in fig. 2, a through slot 120 is provided in the center of the mounting bracket 12 to facilitate passage of the cable 02 through the mounting bracket 12. When the crane drives the cable 02 to hoist goods, the cable 02 can shake due to natural wind or the movement of the crane, so that the cable 02 can swing in the through groove 120 under the action of the through groove 120, and the problem that the triggering assembly 1 cannot block the cable 02 can be guaranteed.

As shown in fig. 4, a limiting assembly 3 is arranged at one end of the triggering bracket 122 far away from the main bracket 121, the limiting assembly 3 comprises a limiting mounting frame 31 and a limiting plate 32, the limiting plate 32 is fixed on the triggering bracket 122 through the limiting mounting frame 31, and the limiting plate 32 is in contact connection with the suspension arm 01. The arrangement is such that if the proximity switch 11 is too delayed, the upper crash block 21 is not stopped in time and continues to lift, the limit plate 32 resists the suspension arm 01, and the trigger bracket 122 can not continue to lift, so that the proximity switch 11 is completely damaged.

Claims (6)

1. Go up stop device, go up stop device setting on the davit of loop wheel machine, the hawser of loop wheel machine is connected its characterized in that with last stop device: the upper limiting device comprises a trigger assembly and a collision block assembly, the trigger assembly is arranged on a suspension arm, one end of a cable is connected with a winch on the crane, the other end of the cable penetrates through the trigger assembly and is connected with a lifting hook, the collision block assembly is arranged on the cable between the lifting hook and the trigger assembly, the trigger assembly comprises a proximity switch, a mounting bracket, a switch mounting bracket, a trigger connecting plate and a trigger fixing plate, the mounting bracket comprises a main bracket and a trigger bracket, the trigger bracket is arranged on the main bracket, and the main bracket is hinged on the suspension arm; the trigger bracket is provided with a trigger connecting plate, and the proximity switch is arranged on the suspension arm above the trigger bracket through a switch mounting frame; a trigger fixing plate is arranged on the trigger bracket, a trigger connecting plate is arranged on the induction part of the proximity switch, and the trigger connecting plate is connected with the trigger fixing plate; the other end of the cable passes through the trigger support and is connected with the lifting hook, the collision block assembly is positioned on the cable below the trigger support, and the proximity switch is electrically connected with the winch.

2. An upper limit device as claimed in claim 1, wherein: the collision block assembly comprises an upper collision block, a buffer spring and a lower collision block, wherein the upper collision block is arranged at one end of the cable close to the trigger assembly in a sliding manner, the lower collision block is fixed at one end of the cable close to the lifting hook, and the buffer spring is movably arranged on the cable between the upper collision block and the lower collision block.

3. An upper limit device as claimed in claim 1, wherein: a through groove which is convenient for the cable to pass through the mounting bracket is arranged at the center of the mounting bracket.

4. An upper limit device as claimed in claim 1, wherein: the one end that keeps away from the main support at the trigger support is equipped with restriction subassembly, restriction subassembly is including restriction mounting bracket and restriction board, the restriction board is fixed on the trigger support through restriction mounting bracket, restriction board and davit contact connection.

5. An upper limit device as claimed in claim 1, wherein: the trigger connecting plate is provided with a limit groove arranged along the length direction of the trigger connecting plate, a bolt sliding along the length direction of the limit groove is arranged in the limit groove, and the trigger fixing plate is connected with the bolt.

6. An upper limit device as claimed in claim 1, wherein: the main support is a support arranged in an arc shape.