Power-off protection device for crane
阅读说明:本技术 一种用于起重机的断电保护装置 (Power-off protection device for crane ) 是由 包志国 于 2020-05-13 设计创作,主要内容包括:本发明涉及一种用于起重机的断电保护装置,包括底座、电机、减速机构和保护机构,所述减速机构包括支撑组件和减速组件,所述保护机构包括固定杆、电磁铁、横杆、配重块、麻绳和支杆,所述连接单元包括弹力拉绳和连杆,该用于起重机的断电保护装置通过支撑机构实现对第一夹持片和第二夹持片的支撑和使得第一夹持片和第二夹持片可以更好的使得刹车片与电机的转轴贴合,使得电机的转轴通过与刹车片摩擦,使得电机的转轴停止,这里第一夹持片和第二夹持片对电机转轴的夹持力,主要是通过配重块的自重和第二弹簧的回复力来实现的,这里通过调节配重块的重量和摩擦块的大小可以实现对不同型号的起重机实现断电保护,增加了使用的实用性。(The invention relates to a power-off protection device for a crane, which comprises a base, a motor, a speed reducing mechanism and a protection mechanism, wherein the speed reducing mechanism comprises a supporting component and a speed reducing component, the protection mechanism comprises a fixed rod, an electromagnet, a cross rod, a balancing weight, a hemp rope and a supporting rod, a connecting unit comprises an elastic pull rope and a connecting rod, the power-off protection device for the crane realizes the support of a first clamping piece and a second clamping piece through the supporting mechanism and enables the first clamping piece and the second clamping piece to better enable the brake piece to be attached to a rotating shaft of the motor, the rotating shaft of the motor is enabled to be in friction with the brake piece so as to stop the rotating shaft of the motor, the clamping force of the first clamping piece and the second clamping piece on the rotating shaft of the motor is mainly realized through the self weight of the balancing weight and the restoring force of a second spring, and the power-off protection for cranes of different models can be realized through adjusting the weight of the, the practicability of the use is increased.)
1. The power-off protection device for the crane is characterized by comprising a base (1), a motor (2), a speed reducing mechanism and a protection mechanism, wherein the base (1) is horizontally arranged, the motor (2) and the protection mechanism are both arranged on the base (1), the speed reducing mechanism is arranged on a rotating shaft of the motor (2), and the protection mechanism is positioned on one side of the speed reducing mechanism;
the speed reducing mechanism comprises a supporting assembly and a speed reducing assembly, the speed reducing assembly comprises a first clamping piece (3), a second clamping piece (4) and a brake block (5), the first clamping piece (3) and the second clamping piece (4) are respectively arranged on two sides of a rotating shaft of a motor (2), the first clamping piece (3) and the second clamping piece (4) are both arc-shaped, the circle centers of the first clamping piece (3) and the second clamping piece (4) are coincident with the axis of the rotating shaft of the motor (2), one end of the first clamping piece (3) is hinged with one end of the second clamping piece (4), the other ends of the first clamping piece (3) and the second clamping piece (4) are respectively provided with a fixing block (6), the brake block (5) is arc-shaped, the circle center of the brake block (5) is positioned on the axis of the rotating shaft of the motor (2), and the brake blocks (5) are two, the two brake pads (5) are respectively arranged on two sides of a rotating shaft of the motor (2), the brake pads (5) are positioned between the rotating shaft and the first clamping piece (3), the brake pads (5) are fixedly connected with the first clamping piece (3), a first spring (7) is arranged between the two fixing blocks (6), and two ends of the first spring (7) are respectively connected with the two fixing blocks (6);
the support assemblies are arranged on one sides of the first clamping piece (3) and the second clamping piece (4) respectively, the two support assemblies are symmetrical about a rotating shaft, each support assembly comprises a piston cylinder (8), a second spring (9), a push rod (10) and a bead screw (11), the piston cylinder (8) is arranged on one side of the first clamping piece (3), the second spring (9) is arranged in the piston cylinder (8), the push rod (10) is arranged between the piston cylinder (8) and the first clamping piece (3), one end of the push rod (10) is hinged to the first clamping piece (3), the other end of the push rod (10) extends into the piston cylinder (8) and is hinged to the second spring (9), one end, far away from the push rod (10), of the second spring (9) is connected with the piston cylinder (8), one end, far away from the push rod (10), of the piston cylinder (8) is hinged to the base (1), the wave bead screw (11) is arranged in the piston cylinder (8), the number of the wave bead screws (11) is two, the two wave bead screws (11) are respectively positioned on two sides of the push rod (10), the wave bead screws are fixedly connected with the piston cylinder (8) (11), a clamping groove is formed in one end, positioned in the piston cylinder (8), of the push rod (10), and the wave bead screws (11) are positioned in the clamping groove;
the protection mechanism comprises a fixed rod (12), an electromagnet (13), a cross rod (14), a balancing weight (15), a hemp rope (16) and a support rod (17), wherein the fixed rod (12) is arranged on a base (1), the cross rod (14) and the support rod (17) are both positioned between the fixed rod (12) and the fixed block (6), the cross rod (14) is arranged above the base (1), the support rod (17) is arranged between the cross rod (14) and the base (1), one end of the support rod (17) is connected with the base (1), the other end of the support rod (17) is hinged with the middle of the cross rod (14), the balancing weight (15) and the hemp rope (16) are both arranged below one end of the cross rod (14) far away from the fixed block (6), the balancing weight (15) is connected with the cross rod (14) through the hemp rope (16), the electromagnet (13) is arranged on one side of the top end of the fixed rod (12), the electromagnet (13) is abutted against one end, far away from the first clamping piece (3), of the fixing block (6);
be equipped with the linkage unit between horizontal pole (14) and fixed block (6), the linkage unit includes elasticity stay cord (18) and connecting rod (19), connecting rod (19) have two, and the one end of two connecting rods (19) is articulated, and the other end of two connecting rods (19) is articulated with the one end that first centre gripping piece (3) was kept away from in two fixed blocks (6) respectively, the articulated department of elasticity stay cord (18) and two connecting rods (19) is passed through to the one end that dead lever (12) were kept away from in horizontal pole (14).
2. The power-off protection device for crane according to claim 1, wherein the hinge joint of the cross bar (14) and the support bar (17) is provided with a torsion spring.
3. The power-off protection device for the crane according to claim 1, wherein an arc-shaped elastic sheet (20) is arranged at one end of the second clamping sheet (4) close to the fixing block (6), a limiting groove matched with the arc-shaped elastic sheet (20) is arranged at one end of the first clamping sheet (3) close to the fixing block (6), the circle center of the arc-shaped elastic sheet (20) is located on the axis of the rotating shaft of the motor (2), one end of the arc-shaped elastic sheet (20) is located in the limiting groove, the other end of the arc-shaped elastic sheet (20) is hinged to the second clamping sheet (4), a plurality of protrusions are arranged on the first clamping sheet (3), a plurality of convex blocks are arranged in the limiting groove, and the arc surfaces of the convex blocks are abutted to the arc surfaces of the convex blocks (22).
4. The power-off protection device for the crane according to claim 3, wherein a limit block (21) is arranged at one end of the arc-shaped elastic sheet (20) extending into the chute.
5. The power-off protection device for the crane according to claim 1, wherein a circular friction block (23) is arranged on the rotating shaft of the motor (2), and the central axis of the friction block (23) is coincident with the axis of the rotating shaft of the motor (2).
6. Power-off protection device for cranes according to claim 5, characterized in that the friction block (23) is formed integrally with the shaft of the motor (2).
Technical Field
The invention particularly relates to a power-off protection device for a crane.
Background
The existing power-off protection device for the crane generally stops the gear from rotating through a hard object, so that certain damage can be caused to the gear, the gear cannot be meshed with other gears, the gear needs to be replaced again, the damage possibly caused by power-off is solved, and the gear needs to be replaced after the power-off protection device is used, so that the power-off protection device is relatively troublesome.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to overcome the defects of the prior art, the power-off protection device for the crane is provided.
The technical scheme adopted by the invention for solving the technical problems is as follows: a power-off protection device for a crane comprises a base, a motor, a speed reducing mechanism and a protection mechanism, wherein the base is horizontally arranged;
the speed reducing mechanism comprises a supporting assembly and a speed reducing assembly, the speed reducing assembly comprises a first clamping piece, a second clamping piece and brake blocks, the first clamping piece and the second clamping piece are respectively arranged on two sides of a motor rotating shaft, the first clamping piece and the second clamping piece are both arc-shaped, the circle centers of the first clamping piece and the second clamping piece are coincided with the axis of the motor rotating shaft, one end of the first clamping piece is hinged with one end of the second clamping piece, the other ends of the first clamping piece and the second clamping piece are respectively provided with a fixed block, the brake blocks are arc-shaped, the circle centers of the brake blocks are positioned on the axis of the motor rotating shaft, the number of the brake blocks is two, the two brake blocks are respectively arranged on two sides of the motor rotating shaft, the brake blocks are positioned between the rotating shaft and the first clamping piece, the brake blocks are fixedly connected with the first clamping piece, and a first spring is arranged between the two fixed blocks, two ends of the first spring are respectively connected with the two fixed blocks;
the support assemblies are arranged on one sides of the first clamping piece and the second clamping piece respectively, the two support assemblies are symmetrical about the rotating shaft, each support assembly comprises a piston cylinder, a second spring, a push rod and a bead screw, the piston cylinder is arranged on one side of the first clamping piece, the second spring is arranged in the piston cylinder, the push rod is arranged between the piston cylinder and the first clamping piece, one end of the push rod is hinged with the first clamping piece, the other end of the push rod extends into the piston cylinder and is hinged with the second spring, one end, far away from the push rod, of the second spring is connected with the piston cylinder, one end, far away from the push rod, of the piston cylinder is hinged with the base, the bead screw is arranged in the piston cylinder, the bead screws are two, the two bead screws are located on two sides of the push rod respectively, and the beads are fixedly connected with the piston cylinder, a clamping groove is formed in one end, located in the piston cylinder, of the push rod, and the wave ball screw is located in the clamping groove;
the protection mechanism comprises a fixed rod, an electromagnet, a cross rod, a balancing weight, a hemp rope and a support rod, wherein the fixed rod is arranged on the base, the cross rod and the support rod are both positioned between the fixed rod and the fixed block, the cross rod is arranged above the base, the support rod is arranged between the cross rod and the base, one end of the support rod is connected with the base, the other end of the support rod is hinged with the middle part of the cross rod, the balancing weight and the hemp rope are both arranged below one end, away from the fixed block, of the cross rod, the balancing weight is connected with the cross rod through the hemp rope, the electromagnet is arranged on one side of the top end of the fixed rod, and the electromagnet is abutted against one;
the connecting unit is arranged between the cross rod and the fixed blocks and comprises elastic pull ropes and two connecting rods, one ends of the two connecting rods are hinged, the other ends of the two connecting rods are hinged to the ends, far away from the first clamping piece, of the two fixed blocks respectively, and the end, far away from the fixed rod, of the cross rod is connected with the hinged position of the two connecting rods through the elastic pull ropes.
For better recovery, a torsional spring is arranged at the hinged position of the cross rod and the support rod.
For better make the friction disc support with the pivot of motor and lean on, the one end that the second holding piece is close to the fixed block is equipped with the arc-shaped elastic sheet, the one end that first holding piece is close to the fixed block be equipped with arc-shaped elastic sheet assorted spacing groove, the centre of a circle of arc-shaped elastic sheet is located the axis of the pivot of motor, the one end of arc-shaped elastic sheet is located the spacing inslot, the other end and the second holding piece of arc-shaped elastic sheet are articulated, be equipped with a plurality of archs on the first holding piece, the spacing inslot is equipped with a plurality of lugs, the cambered surface and each bellied cambered surface.
In order to prevent the arc-shaped elastic sheet from being removed and limiting the first clamping sheet and the second clamping sheet, the limiting device is characterized in that one end of the arc-shaped elastic sheet extending into the sliding groove is provided with a limiting block.
In order to increase the friction force, a rotating shaft of the motor is provided with a circular friction block, and the central axis of the friction block coincides with the axis of the rotating shaft of the motor.
In order to increase firmness, the friction block and the motor rotating shaft are integrally formed.
The power-off protection device for the crane has the advantages that the first clamping piece and the second clamping piece are supported through the supporting mechanism, the brake block can be better attached to the rotating shaft of the motor through the first clamping piece and the second clamping piece, the rotating shaft of the motor is made to be in friction with the brake block, the rotating shaft of the motor is made to stop, the clamping force of the first clamping piece and the second clamping piece on the rotating shaft of the motor is mainly achieved through the self weight of the balancing weight and the restoring force of the second spring, power-off protection can be achieved for cranes of different models through adjusting the weight of the balancing weight and the size of the friction block, and the practicability of use is improved.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic structural diagram of a power-off protection device for a crane according to the present invention;
FIG. 2 is a schematic structural diagram of the power-off protection device for the crane of the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 2;
FIG. 4 is an enlarged view of portion B of FIG. 2;
FIG. 5 is a schematic structural diagram of the connection between the arc-shaped spring plate and the first clamping plate of the power-off protection device for a crane according to the present invention;
in the figure: 1. the brake comprises a base, 2. a motor, 3. a first clamping piece, 4. a second clamping piece, 5. a brake block, 6. a fixed block, 7. a first spring, 8. a piston cylinder, 9. a second spring, 10. a push rod, 11. a bead screw, 12. a fixed rod, 13. an electromagnet, 14. a cross rod, 15. a balancing weight, 16. a hemp rope, 17. a supporting rod, 18. an elastic pull rope, 19. a connecting rod, 20. an arc-shaped elastic sheet, 21. a limiting block, 22. a bulge and 23. a friction block.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
As shown in fig. 1-5, a power-off protection device for a crane comprises a
the speed reducing mechanism comprises a supporting assembly and a speed reducing assembly, the speed reducing assembly comprises a first clamping piece 3, a
the support assemblies are arranged on one sides of the first clamping piece 3 and the
the protection mechanism comprises a
a connecting unit is arranged between the
For better recovery, a torsion spring is arranged at the hinged part of the
For better make
In order to prevent the arc-shaped
In order to increase the friction force, the friction device is characterized in that a
In order to increase the firmness, the
Both the
The power-off protection device for the crane is used for controlling the drive shaft of the paying-off of the crane.
When the crane is suddenly powered off, the
Here, the
Here, by providing the limiting mechanism between the first holding piece 3 and the
When the return is needed, only by pulling the two fixing
The power-off protection of cranes of different models can be realized by adjusting the weight of the balancing
Compared with the prior art, this a power-off protection device for hoist passes through supporting mechanism and realizes the support to first holding piece 3 and
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
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