Double-brake device of pneumatic hoist

Abstract

The utility model discloses a double-brake device of a pneumatic hoist. The double-brake device comprises the pneumatic hoist, a first brake, a second brake and a switching device. The first brake is arranged on the rear portion of the pneumatic motor, the second brake is arranged on the speed reducer, a left chuck of the switching device is movably arranged on a shaft body of a rotating shaft of the speed reducer, a right chuck of the switching device is fixedly arranged on a push rod of a second air cylinder of the second brake, and the left chuck and the right chuck are combined when the second brake brakes. The second brake slips during braking, and the pneumatic travel switch is triggered to control the first brake to work. Working is automatically controlled through the double brake devices, slipping during braking is effectively prevented, and the safety performance of the pneumatic hoist is improved to the maximum extent.

Description

TECHNICAL FIELD

[0001] The utility model relates to a double brake device of pneumatic hoist, relate to pneumatic hoisting equipment technical field. BACKGROUND

[0002] The pneumatic hoist of the market has the advantages of strong load capacity, safety and convenient use, but the defect is that the brake device is easy to wear and cause falling accidents; the market urgently needs a pneumatic hoist with double brake devices to meet market needs. SUMMARY

[0003] The utility model discloses a double brake device of pneumatic hoist, relate to pneumatic hoisting equipment technical field.

[0004] In view of above-mentioned technical problem, the utility model provides a double brake device of pneumatic hoist, including pneumatic hoist, first brake, second brake and switching device. The transmission shaft of pneumatic motor of pneumatic hoist is connected with the rotating shaft of speed reducer, and the first brake seat of first brake is arranged on the shaft head of transmission shaft of pneumatic motor, the first cylinder of first brake is arranged on the shell of rear part of pneumatic motor, and the push rod of first cylinder is provided with first brake disc, and the structure of first brake is tapered brake. The second brake seat of second brake is arranged on the shaft head of rotating shaft of speed reducer, the second cylinder of second brake is arranged on the box of speed reducer, and the push rod of second cylinder is provided with second brake disc, and the structure of second brake is disc brake. The left chuck of switching device is movably arranged on the shaft body of rotating shaft of speed reducer, and the left disc body of left chuck is arranged outside the second brake seat, the right chuck of switching device is fixedly arranged on the push rod of second cylinder, the pneumatic travel switch of switching device is arranged on the box of speed reducer, a travel lever is arranged on the pneumatic travel switch, and the outside of right chuck is provided with a gear ring. When second brake works, left chuck and right chuck are combined with each other, when second brake slips, left chuck and right chuck rotate simultaneously, the gear ring drives the displacement of travel lever, and the pneumatic travel switch controls the work of first brake. When switching device controls second brake to slip, first brake works automatically, when second brake stops brake work, the travel lever of pneumatic travel switch resets automatically, and first brake stops brake work.

[0005] Preferably, a pneumatic alarm device is arranged on the pneumatic travel switch, and the pneumatic alarm device works when second brake slips.

[0006] Preferably, first brake and second brake work simultaneously, and an upper three-way valve and a lower three-way valve are arranged on the controller, the upper three-way valve of controller controls the work of second brake, the lower three-way valve controls the work of pneumatic travel switch, or the lower three-way valve directly controls the work of first brake. ADVANTAGEOUS EFFECTS

[0007] Based on the above technical scheme, the utility model has at least one of the following advantageous effects:

[0008] 1. The utility model discloses a double brake device of pneumatic hoist through setting switching device, when the second brake braking slips, automatic trigger pneumatic travel switch control first brake work, maximum limit has improved the safety performance of pneumatic hoist,

[0009] 2. The pneumatic travel switch is provided with pneumatic alarm device, when the second brake slips, the pneumatic alarm device works,

[0010] 3. The controller is provided with upper three -way valve and lower three -way valve, and the upper three -way valve of controller controls the second brake work, and the lower three -way valve controls the pneumatic travel switch work, or the lower three -way valve directly controls the first brake work. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is the working schematic diagram of the utility model discloses a double brake device of pneumatic hoist. DETAILED DESCRIPTION

[0012] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the following combines specific embodiment, and refers to the drawings, and makes further detailed description to the utility model.

[0013] As Figure 1As shown, a double brake device of a pneumatic hoist comprises a pneumatic hoist 1, a first brake 11, a second brake 21 and a switching device 31. A transmission shaft 3 of a pneumatic motor 2 of the pneumatic hoist 1 is connected with a rotating shaft 5 of a speed reducer 4, a first brake seat 12 of the first brake 11 is arranged on a shaft head of the transmission shaft 3 of the pneumatic motor 2; a first cylinder 13 of the first brake 11 is arranged on a shell 14 at a rear part of the pneumatic motor 2, a push rod of the first cylinder 13 is provided with a first brake disc 15, and the first brake 11 is a taper brake. A second brake seat 22 of the second brake 21 is arranged on a shaft head of the rotating shaft 5 of the speed reducer 4, a second cylinder 23 of the second brake 21 is arranged on a box body 24 of the speed reducer 4, a push rod of the second cylinder 23 is provided with a second brake disc 25, and the second brake 21 is a disc brake. A left chuck 32 of the switching device 31 is movably arranged on a shaft body of the rotating shaft 5 of the speed reducer 4, and a left disc body 33 of the left chuck 32 is arranged outside the second brake seat 22. A right chuck 34 of the switching device 31 is fixedly arranged on the push rod of the second cylinder 23. A pneumatic travel switch 35 of the switching device 31 is arranged on the box body of the speed reducer 4, a travel rod 36 is arranged on the pneumatic travel switch 35, and a tooth ring 41 is arranged outside the right chuck 34. When the second brake 21 works, the left chuck 32 and the right chuck 34 are combined with each other; when the second brake 21 slips, the left chuck 32 and the right chuck 34 rotate simultaneously, the tooth ring 41 drives the travel rod 36 to displace, and the pneumatic travel switch 35 controls the first brake 11 to work. When the switching device 31 controls the second brake 21 to slip, the first brake 11 automatically works; when the second brake 21 stops working, the travel rod 36 of the pneumatic travel switch 35 is automatically reset, and the first brake 11 stops working. A pneumatic alarm device 37 is arranged on the pneumatic travel switch 35, and the pneumatic alarm device 37 works when the second brake 21 slips. The first brake 11 and the second brake 21 work simultaneously, an upper three-way valve 39 and a lower three-way valve 40 are arranged on a controller 38. The upper three-way valve 39 of the controller 38 controls the second brake 21 to work, the lower three-way valve 40 controls the pneumatic travel switch 35 to work, or the lower three-way valve 40 directly controls the first brake 11 to work.

[0014] Thus far, the embodiment of the utility model is introduced.

[0015] The above-described specific embodiments have further detailed the purpose, technical solutions and beneficial effects of the utility model, and it should be understood that the above-described is only a specific embodiment of the utility model and is not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A double brake arrangement for a pneumatic hoist, characterized in that The utility model relates to a kind of air hoist, comprising: Pneumatic motor (2) transmission shaft (3) and the rotation axis (5) of speed reducer (4) are connected; First brake (11), first brake seat (12) is arranged on the shaft head of pneumatic motor (2) transmission shaft (3);The first cylinder (13) of first brake (11) is arranged on the shell (14) of the rear of pneumatic motor (2), and first brake disc (15) is arranged on the push rod of the first cylinder (13);The structure of first brake (11) is tapered brake; Second brake (21), second brake seat (22) is arranged on the shaft head of the rotation axis (5) of speed reducer (4);Second cylinder (23) of second brake (21) is arranged on the box (24) of speed reducer (4), and second brake disc (25) is arranged on the push rod of second cylinder (23);The structure of second brake (21) is disc brake; Switching device (31), left chuck (32) is movably arranged on the shaft body of the rotation axis (5) of speed reducer (4), and left disc body (33) of left chuck (32) is arranged outside second brake seat (22);Right chuck (34) of switching device (31) is fixedly arranged on the push rod of second cylinder (23);Pneumatic travel switch (35) of switching device (31) is arranged on the box of speed reducer (4), and travel lever (36) is arranged on the pneumatic travel switch (35), and the outside of right chuck (34) is provided with gear ring (41);Second brake (21) works, and left chuck (32) and right chuck (34) are combined with each other;When second brake (21) slips, left chuck (32) and right chuck (34) rotate simultaneously, gear ring (41) drives travel lever (36) displacement, and pneumatic travel switch (35) controls first brake (11) to work;When second brake (21) slips under the control of switching device (31), first brake (11) works automatically;Second brake (21) stops brake work, and travel lever (36) of pneumatic travel switch (35) is automatically reset, and first brake (11) stops brake work.

2. A double brake arrangement for a pneumatic hoist according to claim 1, characterized in that: Pneumatic alarm device (37) is arranged on the pneumatic travel switch (35), and pneumatic alarm device (37) works when second brake (21) slips.

3. A double brake arrangement for a pneumatic hoist according to claim 1 or 2, characterized in that: First brake (11) and second brake (21) work simultaneously, and upper three-way valve (39) and lower three-way valve (40) are arranged on controller (38);Upper three-way valve (39) of controller (38) controls second brake (21) to work, and lower three-way valve (40) controls pneumatic travel switch (35) to work, or lower three-way valve (40) directly controls first brake (11) to work.

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