阅读说明：本技术 一种防断链测速制动装置 (Chain breakage preventing speed measuring brake device ) 是由 不公告发明人 于 2020-04-01 设计创作，主要内容包括：本发明涉及一种制动装置,尤其为一种防断链测速制动装置,包括多节伸缩臂,多节伸缩臂的各节伸缩臂内安装测速制动装置,该测速制动装置包括连杆、棘爪、手动复位手柄、测速装置、拉簧、离心装置、棘爪座、电磁铁复位装置和棘条,测速装置与其对应的伸缩臂连接测试并驱动离心装置转动,离心装置在转动超过一定速度时其离心块甩出触发连杆,连杆在正常状态下与棘爪相卡制阻止棘爪转动,离心装置的离心块触发连杆后,连杆解除对棘爪的卡制,棘爪在电磁铁复位装置和重力作用下卡制棘条,本发明能快速有效的在链条失效的状态下有效制动,避免在巨大冲击下造成设备的损坏,保护人员的安全。(The invention relates to a brake device, in particular to a chain breakage prevention speed measurement brake device, which comprises a plurality of sections of telescopic arms, wherein a speed measurement brake device is arranged in each section of telescopic arm of the plurality of sections of telescopic arms, the speed measurement brake device comprises a connecting rod, a pawl, a manual reset handle, a speed measurement device, a tension spring, a centrifugal device, a pawl seat, an electromagnet reset device and a ratchet bar, the speed measurement device is connected with the corresponding telescopic arm to test and drive the centrifugal device to rotate, a centrifugal block of the centrifugal device throws out of a trigger connecting rod when the centrifugal device rotates to exceed a certain speed, the connecting rod is clamped with the pawl under a normal state to prevent the pawl from rotating, after the centrifugal block of the centrifugal device triggers the connecting rod, the connecting rod releases the clamping on the pawl, and the pawl clamps the ratchet bar under the action of the electromagnet reset device and gravity, so that the invention can effectively brake under the state that a chain is out of work and avoid the damage of equipment under the action of huge impact, the safety of personnel is protected.)

1. The utility model provides a prevent broken chain speed measurement arresting gear, includes the flexible arm of multisection, its characterized in that: a speed measuring brake device is arranged in each telescopic arm of the plurality of telescopic arms, the speed measuring brake device comprises a connecting rod (1), a pawl (2), a manual reset handle (3), a speed measuring device (4), a tension spring (5), a centrifugal device (6), a pawl seat (7), an electromagnet reset device (8) and a ratchet bar (9), the speed measuring device (4) is connected with the corresponding telescopic arm to test and drive the centrifugal device (6) to rotate, when the centrifugal device (6) rotates to exceed a certain speed, the centrifugal block is thrown out of the trigger connecting rod (1), the connecting rod (1) is clamped with the pawl (2) to prevent the pawl (2) from rotating in a normal state, after the centrifugal block of the centrifugal device (6) triggers the connecting rod (1), the connecting rod (1) releases the clamping of the pawl (2), the pawl (2) is clamped with the ratchet (9) under the action of the electromagnet resetting device (8) and gravity.

2. The device for preventing chain breakage and measuring speed as claimed in claim 1, wherein: the tension spring (5) is connected with the connecting rod (1).

3. The device for preventing chain breakage and measuring speed as claimed in claim 2, wherein: the connecting rod (1), the manual reset handle (3), the speed measuring device (4), the tension spring (5), the centrifugal device (6), the pawl seat (7) and the electromagnet reset device (8) are all arranged on a mounting seat, and the mounting seat is fixedly mounted on the front section of telescopic arm.

4. The device for preventing chain breakage and measuring speed as claimed in claim 3, wherein: a speed measuring wheel (401) and a plurality of gears (402) are arranged in a shell of the speed measuring device (4), the speed measuring wheel (401) is coaxially connected with one gear (402), and power is transmitted through other gears (402) to drive the centrifugal device (6) to rotate.

5. The device for preventing chain breakage and measuring speed as claimed in claim 4, wherein: the shell of the speed measuring device (4) provides elastic extrusion through the spring rod structure (403), so that the speed measuring wheel (401) of the speed measuring device (4) is tightly attached to the next section of telescopic arm.

6. The device for preventing chain breakage and measuring speed as claimed in claim 5, wherein: the pawl (2) is hinged with the pawl seat (7).

Technical Field

The invention relates to a braking device, in particular to a chain breakage preventing speed measuring braking device.

Background

The driving link of the multi-section telescopic arm mechanism is realized by a gear-rack transmission mechanism. Taking four sections of telescopic arms as an example, the telescopic arm comprises a basic arm, two sections of telescopic arms, three sections of telescopic arms and four sections of telescopic arms. The telescopic driving mechanism is arranged on the basic arm, and the rack is arranged on the two sections of telescopic arms. So that the two sections of telescopic arms perform horizontal telescopic motion. The three-section telescopic arm and the four-section telescopic arm realize synchronous telescopic motion through the telescopic motion of the two-section telescopic arm by chain transmission. The two, three and four sections of telescopic arms have equal telescopic travel and telescopic speed. The requirements of the window cleaning machine in practical use are continuously increased. The telescopic arm of the window cleaning machine needs to have an amplitude variation function, and the telescopic arm does not only horizontally stretch. When the telescopic arm is in a pitching state, the two sections of telescopic arms and the basic arm brake are controlled by the telescopic driving mechanism. The three and four sections of telescopic arms are controlled by chains. Under the state of pitching, if a chain fails, the three-section telescopic arm and the four-section telescopic arm can slide downwards under the action of self weight and load to generate huge impact, and therefore, the chain breakage preventing speed measuring brake device is provided.

Disclosure of Invention

An object of the present invention is to solve the above mentioned drawbacks of the prior art by providing a braking device for preventing chain breakage and measuring speed.

The technical scheme adopted by the invention is as follows: the speed measuring brake device comprises a connecting rod, a pawl, a manual reset handle, a speed measuring device, a tension spring, a centrifugal device, a pawl seat, an electromagnet reset device and a ratchet bar, wherein the speed measuring brake device is installed in each telescopic arm of the telescopic arms and comprises the connecting rod, the pawl, the manual reset handle, the speed measuring device, the tension spring, the centrifugal device, the pawl seat, the electromagnet reset device and the ratchet bar.

As a preferred technical scheme of the invention: the tension spring is connected with the connecting rod.

As a preferred technical scheme of the invention: the connecting rod, the manual reset handle, the speed measuring device, the tension spring, the centrifugal device, the pawl seat and the electromagnet reset device are all arranged on a mounting seat, and the mounting seat is fixedly mounted on the front telescopic arm.

As a preferred technical scheme of the invention: the speed measuring device is characterized in that a speed measuring wheel and a plurality of gears are arranged in a shell of the speed measuring device, the speed measuring wheel is coaxially connected with one of the gears, and power is transmitted through other gears to drive the centrifugal device to rotate.

As a preferred technical scheme of the invention: the shell of the speed measuring device provides elastic extrusion through a spring rod structure, so that a speed measuring wheel of the speed measuring device is tightly attached to the next section of telescopic arm.

As a preferred technical scheme of the invention: the pawl is hinged with the pawl seat.

The invention can effectively brake in the state of chain failure, avoid equipment damage caused by huge impact and protect personnel safety.

Drawings

FIG. 1 is a schematic view of the telescopic arm mechanism of the preferred embodiment of the present invention in an extended state;

FIG. 2 is a schematic structural view of the telescopic arm mechanism according to the preferred embodiment of the present invention in a contracted state;

FIG. 3 is a partial schematic view of the telescopic arm mechanism in the preferred embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a chain breakage preventing speed measuring brake device according to a preferred embodiment of the present invention;

FIG. 5 is a second schematic structural diagram of the chain breakage preventing speed measuring brake device in the preferred embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a speed measuring device according to a preferred embodiment of the present invention;

FIG. 7 is a schematic view of the centrifugal block throwing direction of the centrifugal apparatus according to the preferred embodiment of the present invention.

The reference numbers illustrate:

the device comprises a connecting rod 1, a pawl 2, a manual reset handle 3, a speed measuring device 4, a speed measuring wheel 401, a gear 402, a spring rod structure 403, a tension spring 5, a centrifugal device 6, a pawl seat 7, an electromagnet reset device 8, a ratchet bar 9, a basic arm 10, a two-section telescopic arm 11, a three-section telescopic arm 12, a four-section telescopic arm 13, a chain 14, a rack 15 and a telescopic driving mechanism 16.

Detailed Description

It should be noted that, in the present application, features of embodiments and embodiments may be combined with each other without conflict, and technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a chain breakage preventing speed measuring brake device which comprises a plurality of sections of telescopic arms, wherein a speed measuring brake device is installed in each section of telescopic arm of the plurality of sections of telescopic arms, the speed measuring brake device comprises a connecting rod 1, a pawl 2, a manual reset handle 3, a speed measuring device 4, a tension spring 5, a centrifugal device 6, a pawl seat 7, an electromagnet reset device 8 and a ratchet bar 9, the speed measuring device 4 is connected with the corresponding telescopic arm to test and drive the centrifugal device 6 to rotate, a centrifugal block of the centrifugal device 6 is thrown out of a trigger connecting rod 1 when the centrifugal device rotates at a speed higher than a certain speed, the connecting rod 1 is clamped with the pawl 2 to prevent the pawl 2 from rotating in a normal state, after the centrifugal block of the centrifugal device 6 triggers the connecting rod 1, the connecting rod 1 releases the clamping on the pawl 2, and the pawl 2 is clamped with the ratchet bar 9 under the action of the electromagnet reset device 8 and gravity.

In a preferred embodiment, as seen in the whole, taking the four-section telescopic boom mechanism shown in fig. 1-3 as an example, it includes a basic boom 10, two sections of telescopic booms 11, three sections of telescopic booms 12, and four sections of telescopic booms 13, the four telescopic booms are slidably sleeved with each other, and are driven to extend and retract by a telescopic driving mechanism 16 installed on the basic boom 10, specifically, the telescopic driving mechanism 16 is a motor with arbitrary speed regulation, the output shaft of the motor is coaxially connected with a cylindrical gear, the toothed rack 15 on the two sections of telescopic booms 11 is engaged with the cylindrical gear to drive the extension and retraction of the two sections of telescopic booms 11, and the two sections of telescopic booms 11 are driven to synchronously extend and retract by a chain 14 and a chain wheel during extension and retraction, and the three sections of telescopic booms 12 are driven to synchronously extend and retract by a chain 14 and a chain wheel, and the two said chain-breaking-proof speed-measuring braking devices are installed on the two sections of telescopic booms 11 and the three sections of telescopic booms 12 respectively, taking the two sections of the telescopic arms 11 as an example, referring to fig. 4 and 5, the tachometer wheel 401 in the tachometer 4 is closely attached to the three sections of the telescopic arms 12, and under a normal working condition, the speed is normal, and the centrifugal device 6 does not work. The centrifugal thrower in the centrifugal device 6 is not thrown out under the action of normal speed centrifugal force. The connecting rod 1 cannot swing under the action of the tension spring 5, and the pawl 2 is not triggered. And the two and three telescopic arms can normally perform telescopic motion.

If the chain is broken, the three telescopic arms 12 slide down at the highest speed under the action of the self weight and the load (the telescopic arms are in a pitching state), and the speed measuring wheel 401 in the speed measuring device 4 rotates rapidly under the sliding friction force of the three telescopic arms 12 and drives the centrifugal device 6 to rotate. The centrifugal block in the centrifugal device 6 is thrown out under the action of the ultracentrifugal force. The centrifugal block is triggered, the connecting rod 1 swings upwards, the pawl 2 falls down, and the ratchet 9 on the three telescopic arms 12 is clamped to effectively brake.

The electromagnet resetting device 8 is an electrified solenoid coil, a slidable magnet block in the electromagnet resetting device pulls the manual resetting handle 3 to swing through a connecting rod, the other end of the manual resetting handle 3 is connected with the pawl 2 and is hinged to the pawl seat 7 together with the pawl 2, and when the connecting rod 1 is triggered by the centrifugal block to be separated from the clamping of the pawl 2, the pawl 2 rotates downwards under the dual acting force of the self gravity and the magnet block of the electromagnet resetting device 8 driving the manual resetting handle 3 to pull so as to clamp the ratchet bar 9.

When the electromagnet resetting device 8 is powered off and loses magnetism, the telescopic arm in the pitching state is firstly adjusted to the horizontal position, and the pawl 2 can reset under the reverse self-weight.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.