CN212050312U - Overspeed detection device and hoist engine - Google Patents

Abstract

The embodiment provides an overspeed detection device and a winch, and relates to the field of winches. The problem of current detection device for detecting hoist overspeed state inconvenient installation is intended to improve. The overspeed detection device comprises a rotating shaft, a trigger switch, a movable block and an elastic connecting piece, wherein the elastic connecting piece is connected with the movable block so as to enable the movable block to be close to or far away from the rotating shaft in the rotating speed change process of the rotating shaft; when the rotating speed of the rotating shaft exceeds the preset rotating speed, the movable block abuts against the trigger switch, so that the trigger switch is triggered and sends an alarm signal outwards. The hoist includes an overspeed detection device. When the reel hypervelocity, the pivot also hypervelocity, the movable block is got rid of the farthest, and trigger switch is triggered and is sent the overspeed signal, compares and adopts the great tacho generator of volume among the prior art, and the overspeed detection device that this embodiment provided adopts mechanical structure to assemble, and the size of structure easily designs and manufactures according to occupation space, and the suitable installation is in the less occasion in space, and it is convenient to install simultaneously and dismantle.

Description

Overspeed detection device and hoist engine

Technical Field

The utility model relates to a hoist engine field particularly, relates to an overspeed detection device and hoist engine.

Background

The tachogenerator is a micro-motor whose output electromotive force is proportional to the rotation speed. When the mechanism to be measured is coaxially connected with the tachogenerator, the rotating speed of the mechanism to be measured can be obtained only by detecting the output electromotive force, so the mechanism to be measured is also called as a speed sensor.

At present, a common overspeed detection device adopts a tachogenerator, but the tachogenerator has the problem of inconvenient installation when the space is small.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an overspeed detection device, for example, it can improve the current inconvenient problem of detection device installation that is used for detecting hoist engine overspeed state.

The utility model discloses an aim still includes, provides a hoist engine, and it can improve the current inconvenient problem of detection device installation that is used for detecting hoist engine overspeed state.

The embodiment of the utility model discloses a can realize like this:

an embodiment of the utility model provides an overspeed detection device for detect the overspeed state of winch reel, overspeed detection device includes:

the rotating shaft is connected with the winding drum and driven by the winding drum to rotate;

the device comprises a trigger switch, a movable block and an elastic connecting piece, wherein the trigger switch and the rotating shaft are arranged at intervals, the movable block is arranged between the trigger switch and the rotating shaft, and the elastic connecting piece is connected with the movable block so as to enable the movable block to be close to or far away from the rotating shaft in the rotating speed change process of the rotating shaft; when the rotating speed of the rotating shaft exceeds the preset rotating speed, the movable block abuts against the trigger switch, so that the trigger switch is triggered and outputs an alarm signal.

In addition, the embodiment of the present invention provides an overspeed detection apparatus, which can also have the following additional technical features:

optionally:

the overspeed detection device also comprises a guide rod, the guide rod is connected with the trigger switch and the rotating shaft, the movable block can be connected on the guide rod in a sliding way, and is close to or far away from the rotating shaft along the extension direction of the guide rod in the rotating speed change process of the rotating shaft.

Optionally:

the overspeed detection device further comprises a backstop elastic sheet, wherein the backstop elastic sheet is connected to the guide rod and used for abutting against the movable block when the movable block abuts against the trigger switch so as to prevent the movable block from being separated from the trigger switch.

Optionally:

the backstop elastic sheet and the guide rod are arranged in an included angle; the stopping elastic sheet is used for being close to the guide rod under the pressing action of the movable block in the process that the movable block moves close to the trigger switch, and returns to the initial position when the movable block abuts against the trigger switch so as to abut against the movable block.

Optionally:

the elastic connecting piece comprises a spring, one end of the spring is fixed on the guide rod, and the other end of the spring is connected with the movable block.

Optionally:

the overspeed detection device also comprises an anti-drop block; the anti-falling block is fixed at one end of the guide rod, which is far away from the rotating shaft, so as to prevent the movable block from falling off the guide rod.

Optionally:

the overspeed detection device also comprises a conductive slip ring; the conductive slip ring is fixed at one end of the rotating shaft, which is far away from the winding drum, and is used for being electrically connected with the trigger switch so as to transmit an alarm signal when the trigger switch is triggered.

Optionally:

the guide rod is horizontally arranged; the overspeed detection device also comprises a reversing assembly, wherein the reversing assembly is used for connecting the rotating shaft and the output shaft of the winding drum so as to enable the rotating shaft axis of the rotating shaft to be vertical.

Optionally:

the overspeed detection device also comprises a speed increasing mechanism; the speed increasing mechanism is used for connecting the rotating shaft and an output shaft of the winding drum so as to enable the rotating speed of the rotating shaft to exceed a preset rotating speed when the winding drum is overspeed.

The embodiment of the utility model also provides a hoist engine. The hoist includes an overspeed detection device.

The utility model discloses overspeed detection device and hoist engine's beneficial effect includes, for example:

overspeed detection device, the reel is when rotatory, under the centrifugal force effect, the movable block that is being pulled by elastic connection spare reciprocating motion between trigger switch and pivot, when the reel is overspeed, the pivot is also overspeed, the movable block is got rid of the farthest department, trigger switch is triggered and is sent out the overspeed signal, compare the great tachogenerator of adoption volume among the prior art, the overspeed detection device that this embodiment provided adopts mechanical structure assembly, the size of structure easily designs and manufactures according to occupation space, it is convenient to suit to install in the less occasion in space, it is convenient to install simultaneously and dismantle, help improving the current inconvenient problem of detection device installation that is used for detecting hoist engine overspeed state.

The hoist, including foretell overspeed detection device, can improve the current inconvenient problem of detection device installation that is used for detecting hoist overspeed state.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a first structure of an overspeed detection apparatus according to an embodiment of the present invention in a first state;

fig. 2 is a schematic structural diagram of an overspeed detecting apparatus according to an embodiment of the present invention, in which a first structure is in a second state;

fig. 3 is a schematic structural diagram of a second structure of the overspeed detection apparatus according to an embodiment of the present invention in a first state;

fig. 4 is a schematic structural diagram illustrating a second structure of the overspeed detection apparatus according to the embodiment of the present invention in a second state;

fig. 5 is a schematic structural diagram illustrating a third structure of the overspeed detection apparatus according to the embodiment of the present invention in the first state;

fig. 6 is a schematic structural diagram of a third structure of the overspeed detection apparatus according to an embodiment of the present invention in a second state.

Icon: 10-a reel; 100-overspeed detection device; 101-a rotating shaft; 102-a guide bar; 103-trigger switch; 104-an anti-drop block; 105-a movable block; 106-a spring; 107-retaining spring plate; 108-a conductive slip ring; 110-a commutation component; 120-speed increasing mechanism.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the products of the present invention are used, the description is only for convenience of description and simplification, but the indication or suggestion that the indicated device or element must have a specific position, be constructed and operated in a specific orientation, and thus, should not be interpreted as a limitation of the present invention.

Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

At present, a common overspeed detection device adopts a tachogenerator, but the volume of the tachogenerator is large, and the problem of inconvenient installation exists when the space is small. In the prior art, an encoder can also be adopted, but the encoder needs to be processed by system software such as a controller and the like, so that the problem of low safety exists. The overspeed detection device and the winch provided by the embodiment can improve the technical problem.

The overspeed detecting device according to the present embodiment will be described in detail with reference to fig. 1 to 6.

Referring to fig. 1, an embodiment of the present invention provides an overspeed detection apparatus 100 for detecting an overspeed state of a winch drum 10, where the overspeed detection apparatus 100 includes: the rotating shaft 101 is used for being connected with the winding drum 10, and the rotating shaft 101 is driven by the winding drum 10 to rotate; the rotating shaft 101 is provided with a trigger switch 103, a movable block 105 and an elastic connecting piece, wherein the trigger switch 103 and the rotating shaft 101 are arranged at intervals, the movable block 105 is arranged between the trigger switch 103 and the rotating shaft 101, and the elastic connecting piece is connected with the movable block 105 so that the movable block 105 is close to or far away from the rotating shaft 101 in the rotating speed change process of the rotating shaft 101; when the rotating speed of the rotating shaft 101 exceeds the preset rotating speed, the movable block 105 abuts against the trigger switch 103, so that the trigger switch 103 is triggered and outputs an alarm signal.

The hoist is a light and small hoisting device, also called a winch, for hoisting or pulling heavy objects by winding a steel wire rope or a chain on a winding drum 10. The overspeed state of the hoist is obtained by detecting the overspeed state of the hoist drum 10. The overspeed detecting device 100 of the present embodiment is provided for detecting an overspeed state of the spool 10.

The movable block 105 is arranged between the trigger switch 103 and the rotating shaft 101, the winding drum 10 rotates to drive the rotating shaft 101 to rotate, and the movable block 105 moves away from the rotating shaft 101 under the action of centrifugal force and elastic force of the elastic connecting piece. When the rotating speed of the rotating shaft 101 does not exceed the preset rotating speed, the elastic force of the elastic connecting piece can balance the centrifugal force, the sliding distance of the movable block 105 on the guide rod 102 is small, and the movable block 105 cannot touch the trigger switch 103. When the rotating speed of the rotating shaft 101 exceeds the preset rotating speed, the elastic force of the elastic connecting piece is not enough to balance the centrifugal force, the movable block 105 is thrown to the position where the movable block can abut against the trigger switch 103, and the trigger switch 103 is triggered.

The relationship between the rotation speed of the rotating shaft 101 and the rotation speed of the winding drum 10 is related to the connection structure between the winding drum 10 and the rotating shaft 101, and the rotation speed relationship between the two can be obtained through conversion according to the connection structure. As long as the rotating speed of the rotating shaft 101 exceeds the preset rotating speed when the winding drum 10 is in the overspeed state, the movable block 105 can abut against the trigger switch 103, and the trigger switch 103 outputs an alarm signal to enable a worker to know the overspeed state. The trigger switch 103 may be a micro switch, or may be another sensor, as long as it can output an alarm signal when the movable block 105 abuts against the movable block.

The overspeed detection device 100 that this embodiment provided adopts mechanical structure such as pivot 101, movable block 105, trigger switch 103 and elastic connection spare to assemble and form, and the structural dimension is easily according to the big or small improved design in use place, and the suitable installation is in the less occasion in space, and it is convenient to install and dismantle simultaneously, helps improving the current inconvenient problem of detection device installation that is used for detecting hoist overspeed state.

Referring to fig. 1, in the embodiment, the overspeed detecting apparatus 100 further includes a guide rod 102, the guide rod 102 is connected to the trigger switch 103 and the rotating shaft 101, and the movable block 105 is slidably connected to the guide rod 102 and moves toward or away from the rotating shaft 101 along an extending direction of the guide rod 102 during a rotation speed variation of the rotating shaft 101.

The guide rod 102 guides the movement of the movable block 105, and under the guiding action of the guide rod 102, the movable block 105 reciprocates between the trigger switch 103 and the rotating shaft 101 when the rotating shaft 101 rotates. When the rotating speed of the rotating shaft 101 exceeds the preset rotating speed, the elastic force of the elastic connecting piece is not enough to balance the centrifugal force, and the movable block 105 moves close to the trigger switch 103 and away from the rotating shaft 101 until the movable block abuts against the trigger switch 103; when the rotating speed of the rotating shaft 101 does not exceed the preset rotating speed, the movable block 105 is far away from the trigger switch 103 and is close to the rotating shaft 101 as the rotating speed of the rotating shaft 101 is reduced.

In addition, in the present embodiment, the movable block 105 is slidably engaged with the guide bar 102. Specifically, the movable block 105 is provided with a sliding hole, and the guide rod 102 is movably matched with the sliding hole. In other embodiments, the sliding fit between the movable block 105 and the guide rod 102 may also be a fit between a guide rail and a slider, for example, a guide rail is disposed on the guide rod 102, a slider is disposed on the movable block 105, and the guide rail and the slider are slidably fitted.

Specifically, referring to fig. 1, the guide bar 102 is disposed in a horizontal direction, and the extending direction of the guide bar 102 is in the direction indicated by the arrow a in fig. 1. The output shaft of the winding drum 10 is arranged in the vertical direction, the rotating shaft 101 is also arranged in the vertical direction, and when the rotating shaft 101 rotates, the guide rod 102 rotates in the horizontal plane.

Referring to fig. 2, in the embodiment, the overspeed detecting apparatus 100 further includes a retaining spring 107, where the retaining spring 107 is connected to the guide rod 102 and is used for abutting against the movable block 105 when the movable block 105 abuts against the trigger switch 103, so as to prevent the movable block 105 from being separated from the trigger switch 103.

The backstop elastic sheet 107 props against the movable block 105 to prevent the movable block 105 from being separated from the trigger switch 103, and the trigger switch 103 can continuously output an alarm signal until workers find the alarm signal and manually reset, so that the alarm effect is enhanced. That is, the retaining spring 107 is used for maintaining an overspeed alarm signal, and ensures that the alarm signal can be maintained all the time until manual reset after overspeed occurs.

Specifically, with reference to fig. 1 and 2, the backstop spring sheet 107 and the guide rod 102 form an included angle; the anti-return spring sheet 107 is used for being pressed by the movable block 105 to approach the guide rod 102 in the process that the movable block 105 moves to approach the trigger switch 103, and is returned to the initial position to abut against the movable block 105 when the movable block 105 abuts against the trigger switch 103.

Taking the relative position in fig. 1 as an example for explanation, when the movable block 105 is at the initial position, the movable block 105 forms an included angle with the guide rod 102, and the opening faces to the left side, when the movable block 105 moves to the left (close to the trigger switch 103), the movable block 105 presses the anti-return elastic sheet 107, so that the anti-return elastic sheet 107 is close to and close to the guide rod 102, until the movable block 105 crosses the movable block 105 and abuts against the trigger switch 103, at this time, referring to fig. 2, the anti-return elastic sheet 107 is staggered by the movable block 105, the anti-return elastic sheet 107 also returns to the initial position, the end of the anti-return elastic sheet 107 can abut against the movable block 105, so that the movable block 105 abuts against the trigger. When needing to be explained, during the manual reset, artifical external force presses stopping shell fragment 107, makes stopping shell fragment 107 press close to guide arm 102 to make movable block 105 move to one side that stopping shell fragment 107 is close to pivot 101, consequently, should set up the clearance between movable block 105 and the guide arm 102, guarantee that stopping shell fragment 107 is when laminating guide arm 102, movable block 105 can cross stopping shell fragment 107.

With continued reference to fig. 1, in this embodiment, the elastic connection member includes a spring 106, one end of the spring 106 is fixed on the guide rod 102, and the other end of the spring 106 is connected to the movable block 105.

Specifically, taking the relative position in fig. 1 as an example, the right end of the spring 106 is fixed to the guide bar 102, and the left end of the spring 106 is connected to the movable block 105. When the rotating speed of the rotating shaft 101 does not exceed the preset rotating speed, the elastic force of the spring 106 can balance the centrifugal force of the movable block 105, the movement distance of the movement on the guide rod 102 is small, the movement cannot abut against the trigger switch 103, when the rotating speed of the rotating shaft 101 exceeds the preset rotating speed, the elastic force of the spring 106 is not enough to overcome the centrifugal force, therefore, the movable block 105 is thrown to the position where the elastic force can abut against the trigger switch 103, and the trigger switch 103 is triggered.

Specifically, the spring 106 is fitted around the outer periphery of the guide bar 102.

With continued reference to fig. 1, in the present embodiment, the overspeed detection apparatus 100 further includes an anti-drop block 104; the anti-falling block 104 is fixed at one end of the guide rod 102 far away from the rotating shaft 101 and is used for preventing the movable block 105 from falling off the guide rod 102. The movable block 105 is prevented from breaking away from the guide rod 102 to cause failure, and the danger avoiding function is achieved.

Specifically, taking the relative position in fig. 1 as an example, the right end of the guide rod 102 is connected to the rotating shaft 101, the anti-slip block 104 is fixed to the left end of the guide rod 102, and the trigger switch 103 is fixed to the top of the anti-slip block 104.

With continued reference to FIG. 1, in this embodiment, the overspeed detection apparatus 100 further includes a conductive slip ring 108; the conductive slip ring 108 is fixed on the end of the rotating shaft 101 far away from the winding drum 10 and is used for being electrically connected with the trigger switch 103 so as to transmit an alarm signal when the trigger switch 103 is triggered. A conductive slip ring 108 is provided for connecting the alarm signal output by the trigger switch 103 to external devices, such as an alarm light, an alarm chime, etc.

Specifically, taking the example of the relative position in fig. 1 as an example, the conductive slip ring 108 is provided at the tip end of the rotating shaft 101, and the conductive slip ring 108 is electrically connected to the trigger switch 103. In this embodiment, the wires between the slip rings 108 pass through the rod 102, and pass through the rod 102 from the trigger switch 103 to connect with the slip rings 108.

Referring to fig. 3, in the present embodiment, with reference to fig. 4, the guide rod 102 is horizontally disposed; the overspeed detecting apparatus 100 further includes a reversing assembly 110, and the reversing assembly 110 is configured to connect the rotating shaft 101 and the output shaft of the winding drum 10 such that the rotating axis of the rotating shaft 101 is along the vertical direction.

In this embodiment, the rotating shaft 101 is vertically disposed, the guide rod 102 is horizontally disposed, and the guide rod 102 is perpendicular to the rotating shaft 101. Through switching-over subassembly 110, then regardless of the direction of setting up of reel 10 output shaft, can both convert the rotation of the output shaft of reel 10 into the rotation of pivot 101 for pivot 101 is vertical setting all the time, and guide arm 102 level setting all the time helps reducing the influence of movable block 105 gravity to movable block 105 centrifugal motion like this, makes the testing result change more easily the accuse, more accurate.

Referring to fig. 3 and 4, when the output shaft of the winding drum 10 is not horizontally arranged, the output shaft of the winding drum 10 is connected with the vertically arranged rotating shaft 101 through the reversing assembly 110, so that the output shaft of the winding drum 10 can be in transmission connection with the vertically arranged rotating shaft 101 at all times. When the output shaft of the spool 10 is horizontally disposed, the reversing assembly 110 need not be added.

Referring to fig. 5 and 6, in the present embodiment, the overspeed detecting apparatus 100 further includes a speed increasing mechanism 120; the speed increasing mechanism 120 is used to connect the rotating shaft 101 and the output shaft of the spool 10 so that the rotating speed of the rotating shaft 101 can exceed a preset rotating speed when the spool 10 is overspeed. Specifically, the speed increasing mechanism 120 employs a speed increasing gear.

The speed increasing mechanism 120 is provided to match the rotation speed of the rotating shaft 101 with other components such as the movable block 105, and serves to detect the overspeed state of the spool 10. For example, when the rotation speed of the winding drum 10 is low, a speed increasing device needs to be added between the rotating shaft 101 and the output shaft of the winding drum 10 to increase the rotation speed of the rotating shaft 101, so that the movable block 105 can make centrifugal motion in the rotation process of the rotating shaft 101.

The embodiment of the utility model also provides a hoist engine. The hoist includes an overspeed detecting device 100. The winch further comprises a machine body and a winding drum 10 arranged on the machine body, and the overspeed detection device 100 is connected with an output shaft of the winding drum 10 through a rotating shaft 101 to detect the rotating speed of the winding drum 10.

The overspeed detection apparatus 100 provided in the present embodiment has at least the following advantages:

the novel multifunctional electric heating cooker is formed by assembling mechanical structures such as a rotating shaft 101, a movable block 105, a trigger switch 103, an elastic connecting piece and the like, the structural size is easy to improve and design according to the size of a use field, and the novel multifunctional electric heating cooker is suitable for being installed in occasions with small space and is convenient and fast to install.

The guide rod 102 is provided with a backstop elastic sheet 107, so that an alarm signal can be maintained until the manual reset is carried out.

The reversing assembly 110 is additionally arranged between the rotating shaft 101 and the output shaft of the winding drum 10, so that the rotating shaft 101 is always vertically arranged, and the guide rod 102 is always horizontally arranged, the influence of the gravity of the movable block 105 on the movement of the centrifugal force is reduced, and the detection result is more accurate.

A speed increasing device is added between the rotating shaft 101 and the output shaft of the winding drum 10, which is helpful for increasing the rotating speed of the rotating shaft 101 when the rotating speed of the winding drum 10 is low, so that the movable block 105 can do centrifugal motion under the overspeed state of the winding drum 10 and abut against the trigger switch 103; when the rotation speed of the reel 10 is high, the rotation speed of the rotating shaft 101 is reduced, which contributes to reducing the size of the movement and the structure of the guide rod 102.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. An overspeed detection device for detecting an overspeed state of a hoist drum (10), characterized in that the overspeed detection device comprises:

the rotating shaft (101), the rotating shaft (101) is used for being connected with the winding drum (10) and driven by the winding drum (10) to rotate;

the rotating shaft rotating mechanism comprises a trigger switch (103), a movable block (105) and an elastic connecting piece, wherein the trigger switch (103) and the rotating shaft (101) are arranged at intervals, the movable block (105) is arranged between the trigger switch (103) and the rotating shaft (101), and the elastic connecting piece is connected with the movable block (105) so that the movable block (105) is close to or far away from the rotating shaft (101) in the rotating speed change process of the rotating shaft (101); when the rotating speed of the rotating shaft (101) exceeds a preset rotating speed, the movable block (105) abuts against the trigger switch (103) so that the trigger switch (103) is triggered and outputs an alarm signal.

2. The overspeed detecting apparatus according to claim 1, characterized in that:

the overspeed detection device further comprises a guide rod (102), the guide rod (102) is connected with the trigger switch (103) and the rotating shaft (101), the movable block (105) is connected to the guide rod (102) in a sliding mode, and the movable block is close to or far away from the rotating shaft (101) along the extension direction of the guide rod (102) in the process of rotating speed change of the rotating shaft (101).

3. The overspeed detecting apparatus according to claim 2, characterized in that:

the overspeed detection device further comprises a backstop elastic sheet (107), wherein the backstop elastic sheet (107) is connected to the guide rod (102) and used for abutting against the movable block (105) when the movable block (105) abuts against the trigger switch (103) so as to prevent the movable block (105) from being separated from the trigger switch (103).

4. The overspeed detecting apparatus according to claim 3, characterized in that:

the backstop elastic sheet (107) and the guide rod (102) are arranged in an included angle; the anti-return elastic sheet (107) is used for being pressed by the movable block (105) to be close to the guide rod (102) in the process that the movable block (105) moves close to the trigger switch (103), and returns to the initial position when the movable block (105) abuts against the trigger switch (103) so as to abut against the movable block (105).

5. The overspeed detecting apparatus according to claim 2, characterized in that:

the elastic connecting piece comprises a spring (106), one end of the spring (106) is fixed on the guide rod (102), and the other end of the spring (106) is connected with the movable block (105).

6. The overspeed detecting apparatus according to claim 2, characterized in that:

the overspeed detection device further comprises an anti-drop block (104); the anti-falling block (104) is fixed at one end, far away from the rotating shaft (101), of the guide rod (102) so as to prevent the movable block (105) from falling off the guide rod (102).

7. The overspeed detecting apparatus according to claim 1, characterized in that:

the overspeed detection apparatus further comprises an electrically conductive slip ring (108); the conductive slip ring (108) is fixed at one end of the rotating shaft (101), which is far away from the winding drum (10), and is used for being electrically connected with the trigger switch (103) so as to transmit the alarm signal when the trigger switch (103) is triggered.

8. The overspeed detection apparatus of any one of claims 2 to 6, wherein:

the guide rod (102) is horizontally arranged; the overspeed detection device further comprises a reversing assembly (110), wherein the reversing assembly (110) is used for connecting the rotating shaft (101) and an output shaft of the winding drum (10) so that a rotating axis of the rotating shaft (101) is along a vertical direction.

9. The overspeed detection apparatus of any one of claims 1 to 7, wherein:

the overspeed detection device also comprises a speed increasing mechanism (120); the speed increasing mechanism (120) is used for connecting the rotating shaft (101) and an output shaft of the winding drum (10) so that the rotating speed of the rotating shaft (101) can exceed the preset rotating speed when the winding drum (10) is overspeed.

10. A hoist engine, characterized by:

the hoisting machine comprising the overspeed detecting device of any one of claims 1 to 9.

Images