Power-off buffer device

Abstract

The utility model discloses a power-off buffer device which comprises a guide sleeve, a spring and a telescopic rod, the first end of the guide sleeve is fixedly arranged, the first end of the telescopic rod extends into the guide sleeve from the second end of the guide sleeve, the spring is located in the guide sleeve, and the telescopic rod is located in the guide sleeve. One end of the spring abuts against the first end of the guide sleeve, the other end of the spring abuts against the first end of the telescopic rod, a travel switch installation sleeve is fixedly installed at the second end of the telescopic rod, the end, away from the telescopic rod, of the travel switch installation sleeve is open, and a travel switch installation space is formed in the travel switch installation sleeve. According to the power-off buffering device, when equipment moves towards the power-off buffering device, before the spring is pressed, the travel switch installed in the travel switch installation space can be triggered firstly, so that the equipment is powered off, the travel switch is triggered earlier and more timely, and the situation that the equipment is not shut down in time to cause collision is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of power-off equipment, in particular to a power-off buffer device. Background Art

[0002] When machining equipment such as ordinary lathes cut the outer circle of a workpiece, they generally perform automatic tool movement. During the automatic tool movement, due to misoperation, inertia after stopping, or lack of concentration of the operator, the tool is likely to hit the rotating lathe chuck, causing mechanical injury accidents. To avoid such problems, equipment such as double-beam bridge cranes that perform linear motion during operation are often equipped with a travel switch and a buffer at the end of the stroke. The travel switch is installed at the end of the stroke, and a buffer device is installed on the side of the travel switch close to the equipment. The buffer device is disclosed in the patent document of Chinese patent application No. 02292673.9. During operation, the equipment moves. Once the equipment that moves to the end of the stroke does not stop, it first presses the buffer device, and then moves forward to trigger the travel switch to cut off the power. With the existing travel switch and buffer, the travel switch is triggered to cut off the power after the buffer device compresses the buffer. On the one hand, the buffer device that performs buffering first is compressed to a large extent, which is highly destructive to the buffer device during use and has a short service life; on the other hand, the travel switch that is triggered later has a late response time, which is prone to collision due to untimely shutdown. In addition, existing travel switches are often installed outdoors without rain protection measures, which can easily lead to short circuits and accidents. Utility Model Content

[0003] The utility model aims to provide a power-off buffer device.

[0004] The technical solution for achieving the purpose of the utility model is: a power-off buffer device, including a guide sleeve, a spring and a telescopic rod, the first end of the guide sleeve is fixedly arranged, the first end of the telescopic rod extends into the guide sleeve from the second end of the guide sleeve, the spring is located in the guide sleeve, one end of the spring touches the first end of the guide sleeve, and the other end touches the first end of the telescopic rod, a travel switch mounting sleeve is fixedly installed on the second end of the telescopic rod, the travel switch mounting sleeve is openly arranged away from one end of the telescopic rod, and a travel switch mounting space is provided in the travel switch mounting sleeve.

[0005] Further, the telescopic rod is limitedly installed on the guide sleeve by a limiting mechanism, and the limiting mechanism includes a limiting groove and a bolt hole, the limiting groove is parallel to the guide sleeve, the limiting groove is arranged on the telescopic rod, the bolt hole is arranged on the guide sleeve, a first bolt is penetrated in the bolt hole, and the first bolt extends into the limiting groove. When the guide sleeve is long, there can be no limit between the telescopic rod and the guide sleeve. In order to make the installation structure of the telescopic rod and the guide sleeve more reliable, the telescopic rod will not fall out of the guide sleeve. Preferably, the telescopic rod is limited to be installed on the guide sleeve by a limiting mechanism. When the telescopic rod is limited to be installed on the guide sleeve by a limiting mechanism, the limiting mechanism can be composed of the inner edge of the guide sleeve extending inwardly and the outer edge of the telescopic rod extending outwardly, or can be composed of the limiting groove and the bolt hole. Compared with the former, the latter is more convenient to disassemble and assemble. Further, the guide sleeve, the spring and the telescopic rod are all coaxial. Under the coaxial structure, the force is more uniform and the operation stability is higher.

[0006] Furthermore, the travel switch mounting sleeve is fixedly mounted on the telescopic rod by a second bolt. The second bolt is used for fixing, so that disassembly and assembly are convenient.

[0007] Furthermore, the guide sleeve is connected inside and outside by a through-hole unit. The provision of the through-hole unit facilitates the balance of air pressure inside and outside the guide sleeve during the extension and retraction of the telescopic rod, and the telescopic movement of the telescopic rod will not be affected by air pressure, making the telescopic movement of the telescopic rod easier and more reliable.

[0008] Furthermore, the through hole unit includes a first through hole and a second through hole. The first through hole and the second through hole are arranged to facilitate convection, so that the air pressure inside and outside the guide sleeve is better balanced, and the telescopic movement of the telescopic rod is easier.

[0009] Further, the first through hole is provided on the first end of the guide sleeve, and the second through hole is provided on the telescopic rod. The first through hole and the second through hole can be provided on the side wall of the guide sleeve, or can be provided on the first end of the guide sleeve and the telescopic rod. Compared with the former, the latter can prevent rainwater from entering the guide sleeve through the first through hole and the second through hole.

[0010] Furthermore, the first through hole is parallel to the guide sleeve, and the second through hole is parallel to the telescopic rod.

[0011] Further, the first through hole and the second through hole are coaxial.

[0012] The utility model power-off buffer device, the first end of the guide sleeve is fixedly arranged, the first end of the telescopic rod is extended into the guide sleeve from the second end of the guide sleeve, the travel switch mounting sleeve is mounted on the second end of the telescopic rod, and the travel switch mounting sleeve faces the running equipment. Under this arrangement, when the equipment moves toward the power-off buffer device of the utility model, before pressing the spring, the travel switch installed in the travel switch mounting space can be triggered first to cut off the power of the equipment. The travel switch is triggered earlier and more timely, which greatly reduces the situation of collision caused by untimely shutdown of the equipment; and after the power of the equipment is cut off, when inertia presses the spring, the pressing force is relatively small, and the spring can quickly stop the equipment with buffering under a small deformation. The deformation of the spring is small, and the damage caused by the deformation is small. The service life of the spring is longer, which greatly reduces the replacement frequency.

[0013] In addition, the travel switch is installed in the travel switch installation space, and the travel switch installation sleeve protects the travel switch, which can protect the travel switch from impact and reduce the probability of damage to the travel switch due to impact, and can also prevent rainwater and avoid short circuit accidents caused by rainwater. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a power-off buffer device of the utility model. DETAILED DESCRIPTION

[0015] The preferred implementation of the power-off buffer device of the utility model is described in detail below with reference to the accompanying drawings:

[0016] like Figure 1 As shown, a power-off buffer device comprises a guide sleeve 1, a spring 2 and a telescopic rod 3, wherein the first end 11 of the guide sleeve 1 is fixedly arranged, the first end 31 of the telescopic rod 3 extends into the guide sleeve 1 from the second end 12 of the guide sleeve 1, the spring 2 is located in the guide sleeve 1, one end of the spring 2 contacts the first end 11 of the guide sleeve 1, and the other end contacts the first end 31 of the telescopic rod 3, a travel switch mounting sleeve 4 is fixedly installed on the second end 32 of the telescopic rod 3, the travel switch mounting sleeve 4 is openly arranged away from one end of the telescopic rod 3, and a travel switch mounting space 5 is provided in the travel switch mounting sleeve 4.

[0017] In the power-off buffer device of the utility model, the first end 11 of the guide sleeve 1 is fixedly arranged. When the guide sleeve 1 serves as a bracket, the first end 31 of the telescopic rod 3 extends into the guide sleeve 1 from the second end 12 of the guide sleeve 1. The guide sleeve 1 also limits and guides the telescopic movement of the telescopic rod 3. One end of the spring 2 contacts the guide sleeve 1, and the other end contacts the first end 31 of the telescopic rod 3. After the telescopic rod 3 is pressed against the spring 2 by force, the spring 2 is deformed by force, and buffering is achieved through deformation. The telescopic rod 3 serves as a force transmission member, transmitting the force to the spring 2. Under the deformation of the spring 2, the spring 2 is extended and retracted relative to the guide sleeve 1. One end of the travel switch installation sleeve 4 is installed on the second end 32 of the telescopic rod 3, and the other end is open. The travel switch installation space 5 formed therein is used for the installation of the travel switch.

[0018] The power-off buffer device of the utility model is installed at the end of the travel of the equipment, the travel switch installation sleeve 4 faces the running equipment, and the travel switch 10 is installed in the travel switch installation space 5. During operation, when the equipment approaches the power-off buffer device of the utility model, the travel switch 10 first senses the arrival of the equipment and cuts off the power of the equipment. When the equipment moves forward by inertia after the power-off and presses the travel switch installation sleeve 4, the travel switch installation sleeve 4 and the telescopic rod 3 sequentially transmit the force to the spring 2, and the spring 2 is deformed by the force, and the movement of the equipment is buffered by the deformation. After the buffering effect of the spring 2, the equipment gradually stops.

[0019] The utility model power-off buffer device, the first end 11 of the guide sleeve 1 is fixedly arranged, the first end 31 of the telescopic rod 3 is extended into the guide sleeve 1 by the second end 12 of the guide sleeve 1, the travel switch installation sleeve 4 is installed on the second end 32 of the telescopic rod 3, and the travel switch installation sleeve 4 faces the running equipment. Under this arrangement, when the equipment moves toward the power-off buffer device of the utility model, before pressing the spring 2, the travel switch 10 installed in the travel switch installation space 5 can be triggered first to cut off the power of the equipment. The travel switch is triggered earlier and more timely, which greatly reduces the impact caused by the untimely shutdown of the equipment; and after the power of the equipment is cut off, when the inertia presses the spring 2, the pressing force is relatively small, and the spring 2 can quickly stop the equipment with buffering under a small deformation, the deformation of the spring 2 is small, the damage caused by the deformation is small, the service life of the spring 2 is longer, and the replacement frequency is greatly reduced.

[0020] In addition, the travel switch 10 is installed in the travel switch installation space 5, and the travel switch installation sleeve 4 protects the travel switch 10, which can not only protect the travel switch 10 from impact and reduce the probability of damage to the travel switch 10 due to impact, but also prevent rainwater and avoid short-circuit accidents caused by rainwater.

[0021] In the power-off buffer device of the utility model, preferably, the telescopic rod 3 is limitedly installed on the guide sleeve 1 through a limiting mechanism 6, and the limiting mechanism 6 includes a limiting groove 61 and a bolt hole 62. The limiting groove 61 is parallel to the guide sleeve 1, and the limiting groove 61 is provided on the telescopic rod 3. The bolt hole 62 is provided on the guide sleeve 1. A first bolt 63 is penetrated in the bolt hole 62, and the first bolt 63 extends into the limiting groove 61. When the guide sleeve 1 is long, there can be no limit between the telescopic rod 3 and the guide sleeve 1. In order to make the installation structure of the telescopic rod 3 and the guide sleeve 1 more reliable, the telescopic rod 3 will not fall out of the guide sleeve 1. Preferably, the telescopic rod 3 is limitedly installed on the guide sleeve 1 through the limiting mechanism 6. When the telescopic rod 3 is limited by the limiting mechanism 6 and installed on the guide sleeve 1, the limiting mechanism 6 can be composed of the inner edge of the guide sleeve 1 extending inwardly and the outer edge of the telescopic rod 3 extending outwardly, or can be composed of the limiting groove 61 and the bolt hole 62. Compared with the former, the latter is more convenient to disassemble and assemble.

[0022] In the power-off buffer device of the utility model, preferably, the guide sleeve 1, the spring 2 and the telescopic rod 3 are all coaxial. Under the coaxial structure, the force is more uniform and the operation stability is higher.

[0023] In the power-off buffer device of the utility model, preferably, the travel switch mounting sleeve 4 is fixedly mounted on the telescopic rod 3 by a second bolt 41. The second bolt 41 is fixed to facilitate disassembly and assembly.

[0024] In the power-off buffer device of the utility model, preferably, the inside and outside of the guide sleeve 1 are connected by a through-hole unit 7. The setting of the through-hole unit 7 facilitates the balance of air pressure inside and outside the guide sleeve 1 during the extension and retraction of the telescopic rod 3, and the telescopic movement of the telescopic rod 3 will not be affected by air pressure, so the telescopic movement of the telescopic rod 3 can be easier and more reliable.

[0025] In the power-off buffer device of the utility model, preferably, the through-hole unit 7 includes a first through-hole 71 and a second through-hole 72. The arrangement of the first through-hole 71 and the second through-hole 72 facilitates convection, the air pressure balance effect inside and outside the guide sleeve 1 is better, and the telescopic movement of the telescopic rod 3 is easier.

[0026] In the power-off buffer device of the utility model, preferably, the first through hole 71 is provided on the first end 11 of the guide sleeve 1, and the second through hole 72 is provided on the telescopic rod 3. The first through hole 71 and the second through hole 72 can be provided on the side wall of the guide sleeve 1, or can be provided on the first end 11 of the guide sleeve 1 and the telescopic rod 3. Compared with the former, the latter can prevent rainwater from entering the guide sleeve 1 through the first through hole 71 and the second through hole 72.

[0027] In the power-off buffer device of the present invention, preferably, the first through hole 71 is parallel to the guide sleeve 1 , and the second through hole 72 is parallel to the telescopic rod 3 .

[0028] In the power-off buffer device of the present invention, preferably, the first through hole 71 and the second through hole 72 are coaxial.

[0029] For ordinary technicians in the technical field to which the utility model belongs, the utility model can make several simple deductions or substitutions without departing from the concept of the utility model, which should be regarded as falling within the protection scope of the utility model.

Claims

1. A power-off buffer device, comprising a guide sleeve, a spring and a telescopic rod, characterized in that: The first end of the guide sleeve is fixedly arranged, and the first end of the telescopic rod extends into the guide sleeve from the second end of the guide sleeve. The spring is located in the guide sleeve, and one end of the spring contacts the first end of the guide sleeve, and the other end contacts the first end of the telescopic rod. A travel switch mounting sleeve is fixedly installed on the second end of the telescopic rod, and the travel switch mounting sleeve is openly arranged at one end away from the telescopic rod, and a travel switch mounting space is provided in the travel switch mounting sleeve.

2. The power-off buffer device according to claim 1, characterized in that: The telescopic rod is mounted on the guide sleeve by a limiting mechanism, the limiting mechanism includes a limiting groove and a bolt hole, the limiting groove is parallel to the guide sleeve, the limiting groove is arranged on the telescopic rod, the bolt hole is arranged on the guide sleeve, a first bolt is passed through the bolt hole, and the first bolt extends into the limiting groove.

3. The power-off buffer device according to claim 1, characterized in that: The guide sleeve, the spring and the telescopic rod are all coaxial.

4. The power-off buffer device according to claim 1, characterized in that: The travel switch mounting sleeve is fixedly mounted on the telescopic rod by a second bolt.

5. The power-off buffer device according to claim 1, characterized in that: The guide sleeve is connected inside and outside by a through-hole unit.

6. The power-off buffer device according to claim 5, characterized in that: The through-hole unit includes a first through-hole and a second through-hole.

7. The power-off buffer device according to claim 6, characterized in that: The first through hole is arranged on the first end of the guide sleeve, and the second through hole is arranged on the telescopic rod.

8. The power-off buffer device according to claim 7, characterized in that: The first through hole is parallel to the guide sleeve, and the second through hole is parallel to the telescopic rod.

9. The power-off buffer device according to claim 6, characterized in that: The first through hole is coaxial with the second through hole.

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