An out-pull type wind vane brake

Abstract

The application discloses an outward-pulling wind vane brake, which comprises a magnetic yoke, an armature arranged below the magnetic yoke, and a brake disc arranged below the armature, wherein a first through hole is formed in the outer end of the armature, a second through hole corresponding to the first through hole is formed in the outer magnetic pole of the magnetic yoke, a same movable connecting pull rod is arranged in the first through hole and the second through hole, a release hinge is fixed to the upper side of the magnetic yoke at one end of the pull rod, a release plate is movably connected to the release hinge, a hinge is movably connected to the release plate, and the hinge is fixed to the magnetic yoke; and an encoder is installed in the release plate on the magnetic yoke. The application is convenient and fast to use, can realize that the space in the release plate on the upper side of the magnetic yoke is larger, and makes the installation of the encoder more convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind vane brake, in particular to an external pull type wind vane brake. BACKGROUND

[0002] The wind vane brake can realize the function that the rotating arm of the tower crane can rotate freely with the wind when the tower crane operator leaves work or the tower crane is not used for a long time, so as to prevent the tower arm from being blown down due to too large windward area. When the wind vane mechanism works, the brake is in a released state in the case of power failure, so that the tower arm can be freely adjusted to the wind direction, the windward area of the tower arm is minimized, the windward resistance is minimized, and the tower arm is prevented from falling down to cause a safety accident.

[0003] The existing wind vane brake needs to mill two notches on the magnetic yoke, and install micro switches in the two notches, so that the micro switches are inconvenient to adjust. In addition, the existing wind vane brake opens a hole on the inner magnetic pole of the magnetic yoke, and connects the magnetic yoke with the armature through the hole, so that the space in the release plate above the magnetic yoke is small, and it is inconvenient to install an encoder. SUMMARY

[0004] The main purpose of the present application is to provide an external pull type wind vane brake, which can effectively solve the problems in the background art.

[0005] To achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0006] An external pull type wind vane brake comprises a magnetic yoke, an armature arranged below the magnetic yoke, and a brake disc arranged below the armature. A first through hole is formed in the outer end of the armature, a second through hole corresponding to the first through hole is formed in the outer magnetic pole of the magnetic yoke, and a same movable connecting pull rod is arranged in the first through hole and the second through hole. A release hinge is fixed to the upper side of the magnetic yoke at one end of the pull rod, a release plate is movably connected to the release hinge, a hinge is movably connected to the release plate, and the hinge is fixed to the magnetic yoke. An encoder is installed in the release plate of the magnetic yoke.

[0007] A first micro switch and a second micro switch are installed on the magnetic yoke. The contact of the first micro switch is arranged downward, and the contact of the second micro switch is arranged upward. A first micro switch pull rod and a second micro switch pull rod are fixed to the armature. One end of the first micro switch pull rod is arranged below the contact of the first micro switch, and the second micro switch pull rod is arranged on one side of the second micro switch. An adjusting plate is fixed to the second micro switch pull rod and arranged above the contact of the second micro switch.

[0008] Preferably, the shaft of the encoder and the motor shaft are fixedly connected, the motor shaft passes through the magnetic yoke, the armature and the brake disc in sequence, a gear sleeve is sleeved on the motor shaft, the gear sleeve is engaged with the brake disc, an annular groove is formed in the gear sleeve for sleeving a damping ring to reduce operation noise.

[0009] Preferably, a wind vane electromagnet is mounted on the magnetic yoke through an electromagnet base, a third micro switch is arranged on the wind vane electromagnet, and a supporting plate is further arranged on the wind vane electromagnet.

[0010] Preferably, a screw extending downward is arranged on the release plate, a groove is formed below the screw on the magnetic yoke, a wind vane release spring is sleeved on the screw, and one end of the wind vane release spring is arranged in the groove.

[0011] Preferably, the magnetic yoke is connected with a mounting plate through a hollow bolt, and the air gap is adjusted through the hollow bolt.

[0012] Preferably, a wind vane cover is arranged above the magnetic yoke, and a release handle and a wind vane handle are mounted on the wind vane cover.

[0013] Preferably, the release handle and the release plate are fixedly connected, a first waterproof ring is arranged at the connection between the release handle and the wind vane cover, and a handle cap is sleeved on the release handle.

[0014] Preferably, one end of the wind vane handle is sleeved in an elastic stop ring in the wind vane cover, a spring is sleeved on the wind vane handle outside the wind vane cover, and a second waterproof ring is sleeved on the wind vane handle.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] The first micro switch and the second micro switch are both mounted on the magnetic yoke through a switch base, so that the first micro switch and the second micro switch are more convenient and faster to adjust, and the magnetic yoke has better sealing effect without needing to mill a notch on the magnetic yoke.

[0017] The first through hole is formed in the outer end of the armature, and the second through hole corresponding to the first through hole is formed in the outer magnetic pole of the magnetic yoke, so that the space in the release plate above the magnetic yoke is larger, and the encoder is more convenient to install. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The present application provides an overall structure schematic view of the external pull type wind vane brake.

[0019] Figure 2 It is a schematic view of the magnetic yoke.

[0020] Figure 3 Schematic diagram of armature.

[0021] Figure 4 Schematic diagram of brake disc.

[0022] Figure 5 Schematic diagram of gear sleeve.

[0023] Figure 6 Schematic diagram of wind vane cover.

[0024] Figure 7 Schematic diagram of motor rear end cover.

[0025] Figure 8 Schematic diagram of release plate and pull rod.

[0026] In the figure: 1, magnetic yoke; 2, armature; 3, brake disc; 4, first through hole; 5, second through hole; 6, pull rod; 7, release hinge; 8, release plate; 9, hinge; 10, encoder; 11, first micro switch; 12, second micro switch; 13, first micro switch pull rod; 14, second micro switch pull rod; 15, adjustment plate; 16, motor shaft; 17, gear sleeve; 18, annular groove; 19, electromagnet base; 20, wind vane electromagnet; 21, third micro switch; 22, support plate; 23, magnetic isolation block; 24, screw; 25, recess; 26, wind vane release spring; 27, hollow bolt; 28, mounting plate; 29, motor rear end cover; 30, wind vane cover; 31, release handle; 32, wind vane handle; 33, first waterproof ring; 34, handle cap; 35, elastic retainer; 36, spring; 37, second waterproof ring. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in conjunction with specific embodiments.

[0028] Embodiment 1

[0029] As Figures 1-7As shown, an external pull type wind vane brake includes a magnetic yoke 1, an armature 2 arranged below the magnetic yoke 1, a brake disc 3 arranged below the armature 2, a first through hole 4 is formed in the outer end of the armature 2, a second through hole 5 corresponding to the first through hole 4 is formed in the outer magnetic pole of the magnetic yoke 1, a same movable connecting pull rod 6 is arranged in the first through hole 4 and the second through hole 5, one end of the pull rod 6 is fixed with a release hinge 7 above the magnetic yoke 1, the release hinge 7 is movably connected with a release plate 8, the release plate 8 is movably connected with a hinge 9, and the hinge 9 is fixed on the magnetic yoke 1; an encoder 10 is installed in the release plate 8 on the magnetic yoke 1; a first micro switch 11 and a second micro switch 12 are installed on the magnetic yoke 1, the contact of the first micro switch 11 is arranged downward, the contact of the second micro switch 12 is arranged upward, a first micro switch pull rod 13 and a second micro switch pull rod 14 are fixed on the armature 2, one end of the first micro switch pull rod 13 is arranged below the contact of the first micro switch 11, the second micro switch pull rod 14 is arranged on one side of the second micro switch 12, an adjusting plate 15 is fixed on the second micro switch pull rod 14, and the adjusting plate 15 is arranged above the contact of the second micro switch 12. The first micro switch 11 is an attraction micro switch, which is used for monitoring whether the brake is attracted or not; the second micro switch 12 is a limit micro switch, which is used for monitoring whether the brake disc is worn to the limit state or not.

[0030] The shaft of the encoder 10 is fixedly connected with a motor shaft 16, the motor shaft 16 passes through the magnetic yoke 1, the armature 2 and the brake disc 3 in sequence, a gear sleeve 17 is sleeved on the motor shaft 16, the gear sleeve 17 is engaged with the brake disc 3, an annular groove 18 is formed in the gear sleeve 17, and a damping ring is arranged in the annular groove 18, so as to reduce the running noise. A wind vane electromagnet 20 is installed on the magnetic yoke 1 through an electromagnet base 19, a third micro switch 21 is arranged on the wind vane electromagnet 20, a supporting plate 22 is further arranged on the wind vane electromagnet 20, and a magnetic separation block 23 is arranged above the release plate 8 and the supporting plate 22. A screw 24 extending downward is arranged on the release plate 8, a recess 25 is formed below the screw 24 on the magnetic yoke 1, a wind vane release spring 26 is sleeved on the screw 24, and one end of the wind vane release spring 26 is arranged in the recess 25. The magnetic yoke 1 is connected with a mounting plate 28 through a hollow bolt 27, the air gap is adjusted through the hollow bolt 27, and a motor rear end cover 29 is connected to the mounting plate 28.

[0031] A wind vane cover 30 is arranged above the magnetic yoke 1, a release handle 31 and a wind vane handle 32 are installed on the wind vane cover 30. The release handle 31 is fixedly connected with the release plate 8, a first waterproof ring 33 is arranged at the connection position of the release handle 31 and the wind vane cover 30, and a handle cap 34 is sleeved on the release handle 31. One end of the wind vane handle 32 is sleeved with an elastic stop ring 35 in the wind vane cover 30, a spring 36 is sleeved on the wind vane handle 32 outside the wind vane cover 30, and a second waterproof ring 37 is sleeved on the wind vane handle 32.

[0032] The first micro switch 11 and the second micro switch 12 are both mounted on the magnetic yoke 1 through switch bases, making it more convenient and quick to adjust the first micro switch 11 and the second micro switch 12, and eliminating the need to mill notches on the magnetic yoke 1, thereby improving the sealing effect of the magnetic yoke 1.

[0033] By providing a first through hole 4 at the outer end of the armature 2 and a second through hole 5 corresponding to the first through hole 4 on the outer magnetic pole of the yoke 1, the space inside the release plate 8 above the yoke 1 is larger, making it easier to install the encoder 10.

[0034] Example 2

[0035] like Figure 8 As shown, an external pull-type weather vane brake is described. The structure of the weather vane brake in Embodiment 2 is basically the same as that in Embodiment 1. The difference is that the armature 2 has a first screw hole at its outer end, and the magnetic pole of the yoke 1 has a second screw hole corresponding to the first screw hole. The pull rod 6 is connected to the armature by a thread, and an adjusting nut is fixed at the upper end of the pull rod 6. A hole is drilled in the release plate, and the adjusting nut is loosely fitted in the hole of the release plate. The step of the adjusting nut locks the release plate, preventing the release plate from lifting freely.

[0036] In this embodiment, the design described above reduces the size of the weather vane brake, which in turn reduces the size of the weather vane cover. This size reduction helps to reduce production costs, making it easier to save costs in large-scale production.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. An externally pulled weather vane brake, comprising a magnetic yoke (1), an armature (2) disposed below the magnetic yoke (1), and a brake disc (3) disposed below the armature (2), characterized in that: The armature (2) has a first through hole (4) at its outer end. The magnetic pole of the yoke (1) has a second through hole (5) corresponding to the first through hole (4). The first through hole (4) and the second through hole (5) are connected by the same movable pull rod (6). One end of the pull rod (6) is fixed above the magnetic yoke (1) with a release hinge (7). The release hinge (7) is movably connected to a release plate (8). The release plate (8) is provided with a movable hinge (9). The hinge (9) is fixed to the magnetic yoke (1). An encoder (10) is installed on the magnetic yoke (1) inside the release plate (8). A first micro switch (11) and a second micro switch (12) are installed on the magnetic yoke (1). The contacts of the first micro switch (11) are set downwards, and the contacts of the second micro switch (12) are set upwards. A first micro switch lever (13) and a second micro switch lever (14) are fixed on the armature (2). One end of the first micro switch lever (13) is set below the contacts of the first micro switch (11), and the second micro switch lever (14) is set on one side of the second micro switch (12). An adjusting plate (15) is fixed on the second micro switch lever (14), and the adjusting plate (15) is set above the contacts of the second micro switch (12). The encoder (10) shaft and the motor shaft (16) are fixedly connected. The motor shaft (16) passes through the magnetic yoke (1), the armature (2) and the brake disc (3) in sequence. A gear sleeve (17) is fitted on the motor shaft (16). The gear sleeve (17) meshes with the brake disc (3). An annular groove (18) is provided on the gear sleeve (17) for installing a vibration damping ring to reduce operating noise. A weather vane electromagnet (20) is mounted on the magnetic yoke (1) via an electromagnet base (19). A third micro switch (21) is provided on the weather vane electromagnet (20). A support plate (22) is also provided on the weather vane electromagnet (20). A magnetic shielding block (23) is provided above the release plate (8) and the support plate (22).

2. The external pull-type weather vane brake according to claim 1, characterized in that: The release plate (8) is provided with a downwardly extending screw (24), and the magnetic yoke (1) has a groove (25) below the screw (24). A wind vane release spring (26) is sleeved on the screw (24), and one end of the wind vane release spring (26) is located in the groove (25).

3. The external pull-type weather vane brake according to claim 1, characterized in that: The magnetic yoke (1) is connected to the mounting plate (28) by hollow bolts (27), and the air gap is adjusted by hollow bolts (27). The motor rear end cover (29) is connected to the mounting plate (28).

4. The external pull-type weather vane brake according to claim 1, characterized in that: The magnetic yoke (1) is covered with a weather vane cover (30), and a release handle (31) and a weather vane handle (32) are installed on the weather vane cover (30).

5. The external pull-out wind vane brake according to claim 4, characterized in that: The release handle (31) and the release plate (8) are fixedly connected. A first waterproof ring (33) is provided at the connection between the release handle (31) and the wind vane cover (30). A handle cap (34) is fitted on the release handle (31).

6. The external pull-out wind vane brake according to claim 4, characterized in that: One end of the weather vane handle (32) is fitted inside the weather vane cover (30) with an elastic retaining ring (35), and a spring (36) is fitted over the weather vane cover (30) of the weather vane handle (32). A second waterproof ring (37) is fitted on the weather vane handle (32).

Images