Broken belt detection device for elevator car

Abstract

The utility model relates to a belt breakage detection device for an elevator car, which comprises a car body and a movable rod slidably mounted on the car body, a movable sleeve is slidably mounted at the upper end of the movable rod, a spring is sleeved outside the movable rod, the spring is mounted in the movable sleeve, and the movable sleeve is sleeved outside the movable rod. A transverse rod is detachably installed at the top of the movable rod, the bottom end of the transverse rod abuts against the top end of the movable sleeve, the bottom end of the movable sleeve and the bottom end of the spring abut against one end of the lift car body, and a synchronous belt connecting assembly is installed at the lower end of the movable rod. A sensor is fixedly installed on the portion, located outside the movable sleeve, of the lift car body. With the adoption of the technical scheme, real-time monitoring on breakage of the synchronous belt can be realized under the condition that the synchronous belt is not contacted, so that additional abrasion to the synchronous belt is avoided, the service life of the synchronous belt is prolonged, the installation and maintenance of the sensor are simplified, and the use cost of equipment is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hoist equipment, and more specifically, to a belt breakage detection device for a hoist car. Background Art

[0002] Hoist is a common vertical transportation equipment, widely used in various industrial production and construction. The main working part of the hoist is the car, which realizes the vertical lifting of goods or people through the traction of wire rope or synchronous belt. During the working process of the hoist, the stability of the synchronous belt is very important. Once it breaks, it may cause serious safety accidents. Therefore, real-time monitoring of the synchronous belt is very necessary.

[0003] The existing solution is to install sensors on the synchronous belt to detect the tension change of the synchronous belt, so as to determine whether the synchronous belt is broken. When the sensor detects that the tension of the synchronous belt decreases to a certain extent, it will send out an alarm signal to notify the staff to deal with it.

[0004] However, existing technologies have some problems in practical applications. First, most existing sensors need to be in direct contact with the synchronous belt, which may cause additional wear on the synchronous belt and reduce its service life. Second, existing sensors are also more complicated to install and maintain, which increases the cost of using the equipment. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a broken belt detection device for an elevator car, which can realize real-time monitoring of synchronous belt breakage without contacting the synchronous belt, thereby avoiding additional wear on the synchronous belt, extending its service life, simplifying the installation and maintenance of the sensor, reducing the use cost of the equipment, and being more practical.

[0006] The above-mentioned technical purpose of the utility model is achieved through the following technical solutions: a broken belt detection device for an elevator car, comprising a car body and a movable rod slidably installed on the car body, a movable sleeve is slidably installed on the upper end of the movable rod, a spring is sleeved on the outside of the movable rod, and the spring is installed in the movable sleeve, a cross bar is detachably installed on the top of the movable rod, the bottom end of the cross bar is abutted against the top end of the movable sleeve, the bottom ends of the movable sleeve and the spring are both abutted against one end of the car body, a synchronous belt connection assembly is installed at the lower end of the movable rod, and a sensor is fixedly installed on the outside of the movable sleeve on the car body.

[0007] Furthermore, a mounting hole is provided at the top of the movable rod, and the cross bar is installed in the mounting hole.

[0008] Furthermore, a copper bushing is installed at the sliding connection between the movable rod and the car body.

[0009] Furthermore, the synchronous belt connection assembly includes an intermediate plate and an engagement plate, wherein the intermediate plate is fixedly mounted on the movable rod, and the engagement plate is fixedly mounted on the intermediate plate.

[0010] Furthermore, the lower end of the movable rod is provided with an external thread, and the middle plate is correspondingly provided with an internal thread, the movable rod is threadedly connected to the middle plate, and the engaging plate is fixedly mounted on the middle plate by bolts.

[0011] Furthermore, a positioning rod is fixedly mounted on the synchronous belt connection assembly, and the positioning rod is slidably connected to the car body.

[0012] Furthermore, the sensor is specifically a contact sensor, and under the normal condition that the belt is not broken, the contact sensor is in contact with the movable sleeve.

[0013] Furthermore, the meshing plate is provided with a plurality of tooth blocks meshing with the synchronous belt.

[0014] Furthermore, a protrusion is provided on the car body at the sliding connection with the movable rod to increase the sliding support surface of the car body.

[0015] Furthermore, the movable sleeve and the synchronous belt connecting assembly are both made of aluminum alloy material.

[0016] In summary, the utility model has the following beneficial effects:

[0017] 1. Through the cooperation of the sensor and the movable sleeve, the synchronous belt breakage can be accurately detected without the sensor directly contacting the synchronous belt, avoiding false alarms and missed alarms, while also reducing additional wear on the synchronous belt and extending its service life.

[0018] 2. The utility model adopts simple structures such as movable rods, movable sleeves, springs, etc., which is easy to install and maintain and reduces costs.

[0019] 3. It can be applied to synchronous belt hoists of different specifications and types, and has high versatility and practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the installation of the belt break detection device for the elevator car of the utility model;

[0021] Figure 2 It is a structural schematic diagram of a belt break detection device for a hoist car of the utility model;

[0022] Figure 3The utility model is a cross-sectional structural diagram of a belt breakage detection device for a hoist car.

[0023] In the figure: 1. car body; 2. movable rod; 3. movable sleeve; 4. spring; 5. cross bar; 6. synchronous belt connecting assembly; 61. middle plate; 62. meshing plate; 7. sensor; 8. mounting hole; 9. copper bushing; 10. positioning rod; 11. tooth block; 12. protrusion. DETAILED DESCRIPTION

[0024] The utility model is described in detail below in conjunction with the accompanying drawings and embodiments.

[0025] like Figure 1-3 As shown, the utility model provides a belt break detection device for a hoist car, comprising a car body 1 and a movable rod 2 slidably mounted on the car body 1. The car body 1 is the main structure of the car in the hoist, used to carry materials to rise or fall. The car body 1 in this embodiment is an L-shaped structure, assembled from aluminum profiles and a bottom plate. The movable rod 2 is an axis structure, and multiple components are installed on the movable rod 2. The movable rod 2 remains in place when the synchronous belt is not broken. After the synchronous belt is broken, it slides vertically upward under the action of the spring 4.

[0026] A movable sleeve 3 is slidably mounted on the upper end of the movable rod 2 . The movable sleeve 3 is a hollow cylindrical body, and a through hole matching the movable rod 2 is penetrated at the top end thereof.

[0027] A mounting hole 8 is provided at the top of the movable rod 2, and the cross bar 5 is installed in the mounting hole 8. The diameter of the mounting hole 8 should be slightly smaller than the axial diameter of the cross bar 5. The interference fit between the cross bar 5 and the mounting hole 8 can ensure that the cross bar 5 does not easily slide out of the mounting hole 8. Furthermore, a top screw hole penetrating the mounting hole 8 is provided at the top of the movable rod 2 perpendicular to the axial direction of the mounting hole 8. After the cross bar 5 is installed in place, it is further tightened by the top screw to better prevent sliding.

[0028] A copper sleeve 9 is also installed at the sliding connection between the movable rod 2 and the car body 1. The copper sleeve 9 is used to reduce the sliding friction between the movable rod 2 and the car body 1 and provide support and protection. Since the copper sleeve 9 can form a lubricating layer between the movable rod 2 and the car body 1, it can reduce sliding friction, reduce energy loss, extend the service life of the contact parts, absorb vibrations and impacts, reduce the vibration of the contact parts, and improve the stability and reliability of the system.

[0029] A spring 4 is sleeved outside the movable rod 2 and installed in the movable sleeve 3. The spring 4 is a core component. When the synchronous belt breaks, the stress of the spring 4 is released, driving the movable sleeve 3 out of contact with the sensor 7, thereby triggering an alarm signal.

[0030] The spring 4 is specifically a compression spring 4, the outer diameter of the spring 4 is smaller than the inner diameter of the movable sleeve 3, the inner diameter of the spring 4 is larger than the outer diameter of the movable rod 2, and the length of the spring 4 is larger than the height of the movable sleeve 3 under normal conditions to ensure a certain compression distance. When the synchronous belt breaks, the spring 4 needs to overcome the gravity of the movable rod 2, the movable sleeve 3 and the synchronous belt connecting assembly 6, and drive them to move upward, so the elastic force of the spring 4 needs to be enhanced. Preferably, when installing the spring 4, a certain pre-tightening force is applied in advance, so that the spring 4 has a certain degree of compression in the initial state, so that its initial elastic force when subjected to force can be increased, thereby improving the overall elastic force.

[0031] A cross bar 5 is detachably installed on the top of the movable rod 2, and the bottom end of the cross bar 5 is against the top of the movable sleeve 3. The length of the cross bar 5 is greater than the outer diameter of the movable rod 2 so that it can extend outward and contact the movable sleeve 3. The function of the cross bar 5 is that when the synchronous belt is tightened, the movable rod 2 slides downward and drives the movable sleeve 3 to slide downward through the cross bar 5, thereby compressing the spring 4.

[0032] In the normal state when the synchronous belt is not broken, the bottom ends of the movable sleeve 3 and the spring 4 are both in contact with the upper end surface of the bottom plate of the car body 1. When the synchronous belt breaks, the movable sleeve 3 slides upward, and its bottom end does not contact with the car body 1, while the bottom end of the spring 4 always remains in contact with the car body 1.

[0033] A synchronous belt connecting assembly 6 for connecting a synchronous belt is installed at the lower end of the movable rod 2. The synchronous belt connecting assembly 6 includes an intermediate plate 61 and an engaging plate 62. The intermediate plate 61 is fixedly installed at the bottom of the movable rod 2, and the engaging plate 62 is fixedly installed at the intermediate plate 61.

[0034] Specifically, the lower end of the movable rod 2 is provided with an external thread, and the protrusion on the middle plate 61 is correspondingly provided with an internal thread. The movable rod 2 is threadedly connected to the middle plate 61, and the engaging plate 62 is fixedly installed on the middle plate 61 by bolts.

[0035] Specifically, the meshing plate 62 is provided with a plurality of tooth blocks 11 that can mesh with the synchronous belt. The tooth blocks 11 structure provided on the meshing plate 62 mesh with the tooth shape of the synchronous belt, which can prevent the synchronous belt from slipping. After the meshing is completed, the meshing plate 62 is pressed and fixedly installed on the middle plate 61. The connection is tight, and it is not easy to slip or fall off the belt, which is safe and reliable.

[0036] A sensor 7 is fixedly mounted on the car body 1 outside the movable cover 3. The sensor 7 is specifically a contact sensor 7. Under normal circumstances where the belt is not broken, the contact sensor 7 abuts against the movable cover 3.

[0037] A contact sensor 7 is a sensor that detects, measures or senses certain physical quantities through physical contact 7. They usually use direct contact or detection of the surface of an object to obtain data or information.

[0038] Specifically, the detection end of the contact sensor 7 is in contact with the movable sleeve 3, which is defined as a normal working state. When the synchronous belt breaks, the movable sleeve 3 rises and separates from the contact sensor 7, so that the movable sleeve 3 does not abut with the detection end of the sensor 7. This is defined as an abnormal state, and an alarm signal is issued to prompt the operator to respond in time. This design enables the sensor 7 to accurately and timely detect the breakage of the synchronous belt.

[0039] A positioning rod 10 is fixedly mounted on the synchronous belt connection assembly 6, and the positioning rod 10 is slidably connected to the car body 1. Specifically, the positioning rod 10 is threadedly mounted on the middle plate 61, and the positioning rod 10 should be installed in parallel with the movable rod 2. The purpose of setting the positioning rod 10 is to effectively prevent the synchronous belt connection assembly 6 from shaking or deflecting during operation, and ensure its stable connection with the synchronous belt.

[0040] A raised portion 12 is provided at the sliding connection between the car body 1 and the movable rod 2 to increase the sliding support surface of the car body 1. The raised portion 12 of the car body 1 is provided at the bottom end of the bottom plate to ensure the vertical linear motion accuracy of the movable rod 2.

[0041] Furthermore, the movable sleeve 3 and the synchronous belt connecting assembly 6 are both made of aluminum alloy. The aluminum alloy material is light, high-strength and has good corrosion resistance, and can meet the use requirements of the device in a complex working environment. Finally, the load of the spring 4 is reduced, so that when the synchronous belt breaks, the load can be overcome more easily, driving the movable rod 2 and its connecting parts to rise.

[0042] During the use of the broken belt detection device of the utility model, when the synchronous belt works normally, the movable sleeve 3 is subjected to the tensile force transmitted by the synchronous belt through the synchronous belt connecting assembly 6, and maintains the contact state with the sensor 7. Once the synchronous belt breaks, the movable sleeve 3 will move upward under the elastic force of the spring 4 and separate from the sensor 7, thereby triggering the detection signal of the sensor 7. The sensor 7 transmits the detection signal to the control system, and the control system takes corresponding measures according to the received signal, such as stopping the operation of the hoist or issuing an alarm, so as to ensure the safety of the equipment and personnel.

[0043] To sum up, the utility model is a broken belt detection device for an elevator car with the advantages of simple structure, easy installation, accurate and reliable detection, etc. It can realize timely detection of broken synchronous belts, improve the safety and reliability of the elevator, and realize real-time monitoring of the tension of the synchronous belt without contacting the synchronous belt to avoid additional wear on the synchronous belt, extend its service life, simplify the installation and maintenance of sensor 7, and reduce the use cost of the equipment.

[0044] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A belt break detection device for a hoist car, characterized in that: It includes a car body and a movable rod slidably installed on the car body, a movable sleeve is slidably installed on the upper end of the movable rod, a spring is sleeved on the outside of the movable rod, and the spring is installed in the movable sleeve, a cross bar is detachably installed on the top of the movable rod, the bottom end of the cross bar is abutted against the top of the movable sleeve, the bottom ends of the movable sleeve and the spring are both abutted against one end of the car body, a synchronous belt connection assembly is installed on the lower end of the movable rod, and a sensor is fixedly installed on the outside of the movable sleeve of the car body.

2. A belt break detection device for a hoist car according to claim 1, characterized in that: A mounting hole is provided on the top of the movable rod, and the cross bar is mounted in the mounting hole.

3. A belt break detection device for a hoist car according to claim 1, characterized in that: A copper bushing is also installed at the sliding connection between the movable rod and the car body.

4. A belt breakage detection device for a hoist car according to claim 1, characterized in that: The synchronous belt connection assembly includes an intermediate plate and an engagement plate. The intermediate plate is fixedly mounted on the movable rod, and the engagement plate is fixedly mounted on the intermediate plate.

5. A belt breakage detection device for a hoist car according to claim 4, characterized in that: The lower end of the movable rod is provided with an external thread, and the middle plate is correspondingly provided with an internal thread. The movable rod is threadedly connected to the middle plate, and the engaging plate is fixedly installed on the middle plate by bolts.

6. A belt breakage detection device for a hoist car according to claim 1, characterized in that: A positioning rod is fixedly mounted on the synchronous belt connection assembly, and the positioning rod is slidably connected to the car body.

7. A belt breakage detection device for a hoist car according to claim 1, characterized in that: The sensor is specifically a contact sensor. Under the normal condition that the belt is not broken, the contact sensor abuts against the movable sleeve.

8. A belt breakage detection device for a hoist car according to claim 4, characterized in that: The meshing plate is provided with a plurality of tooth blocks meshing with the synchronous belt.

9. A belt breakage detection device for a hoist car according to claim 1, characterized in that: A protrusion is provided on the car body at the sliding connection with the movable rod to increase the sliding support surface of the car body.

10. A belt breakage detection device for a hoist car according to claim 9, characterized in that: The movable sleeve and the synchronous belt connecting assembly are both made of aluminum alloy material.

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