A tower crane motor

Abstract

To solve the problem of poor heat dissipation function of the existing tower crane motors, an embodiment of the present invention provides a tower crane motor, including a motor body; the motor body includes an eddy current brake with a cooling device, and the eddy current brake is arranged at one end of the motor body and connected to one end of the motor shaft; the other end of the motor shaft is connected to a fan. The tower crane motor of the embodiment of the present invention, through the arrangement of the eddy current brake and the fan, eliminates the independent cooling fan, simplifies the structure, reduces the cost, and improves the heat dissipation capacity of the tower crane motor.

Description

Technical Field

[0001] The present invention relates to a tower crane motor. Background Art

[0002] In a circuit, a motor is represented by the letter M (D in the old standard). Its main function is to generate driving torque and serve as a power source for electrical appliances or various machines. A generator is represented by the letter G in a circuit, and its main function is to convert mechanical energy into electrical energy.

[0003] However, the existing tower crane motors have poor heat dissipation functions. Summary of the Invention

[0004] To solve the problem of poor heat dissipation function of the existing tower crane motors, an embodiment of the present invention provides a tower crane motor to improve the overall reliability and economy of the tower crane motor and solve the function of the additional encoder at the tail. The embodiment of the present invention is realized through the following technical solutions:

[0005] A tower crane motor includes a motor body; the motor body includes an eddy current brake with a cooling device, the eddy current brake is arranged at one end of the motor body and connected to one end of the motor shaft; the other end of the motor shaft is connected to a fan.

[0006] Optionally, the cooling device includes:

[0007] A front frame provided with ventilation grooves; and

[0008] An armature for movably sleeving on the front frame and for connecting to one end of the motor shaft;

[0009] The armature includes:

[0010] Ventilation holes provided in the armature body to discharge the hot air inside the armature body;

[0011] A first fan blade provided outside the armature body to drive the air in the outer air duct to flow forward along the outside of the armature body to the ventilation grooves of the front frame when the armature body rotates; and

[0012] A second fan blade provided inside the armature body to drive the air inside the armature body to flow out of the armature body through the ventilation holes when the armature body rotates;

[0013] The ventilation grooves are communicated with the ventilation holes.

[0014] Optionally, a first air duct is formed inside the armature body and communicated with the ventilation holes, and a second air duct is provided between the front frame and the armature;

[0015] The air outlet end of the first air duct, the air outlet end of the second air duct and the ventilation grooves are communicated;

[0016] The air inlet end of the first air duct and the air inlet end of the second air duct are connected through an air inlet.

[0017] Optionally, the ventilation slots are a number of strip-shaped ventilation slots arranged in parallel; the number of strip-shaped ventilation slots arranged in parallel are evenly distributed in the circumferential direction on the outer side of the front machine base;

[0018] There are a number of the first fan blades, and the number of the first fan blades are evenly distributed in the circumferential direction on the outer side of the armature body;

[0019] There are a number of the second fan blades, and the number of the second fan blades are evenly distributed in the circumferential direction on the inner side of the armature body;

[0020] There are a number of the ventilation holes, and the number of the ventilation holes are evenly distributed on the armature body between adjacent second fan blades.

[0021] Optionally, the armature is hermetically connected to the front machine base by an air gap; the front machine base is provided with a rain shield, the rain shield is sleeved on the front machine base, and the rain shield covers a part of the strip-shaped ventilation slots to prevent rainwater from entering through a part of the strip-shaped ventilation slots.

[0022] Optionally, the radial sealing mating surface of the armature and the radial sealing surface of the front machine base are hermetically connected by a radial air gap; the axial sealing mating surface of the armature and the axial sealing surface of the front machine base are hermetically connected by an axial air gap; the axial air gap is 2 - 4 mm; the radial air gap is 1 - 2 mm.

[0023] Optionally, the other end of the motor body is provided with a wind hood combination structure; the wind hood combination structure includes a metal air duct and a plastic rain shield; the metal air duct and the plastic rain shield are detachably connected.

[0024] Optionally, a brake is further provided at the other end of the motor shaft; a loosening prevention device of a release mechanism is provided on the brake; the loosening prevention device includes an elastic limiting mechanism for restricting the movement space of the release bracket; the release mechanism includes a release bracket, one end of the release bracket is provided with an arc-shaped groove, and the arc-shaped groove is rotatably connected to a rotating connecting member having a connection hole; a fixing member sequentially passes through the armature, the fixing piece and the arc-shaped groove of the brake and is threadedly connected to the connection hole.

[0025] Optionally, the elastic limiting mechanism includes a spring piece; the spring piece is used to be fixed on the brake and the arc-shaped spring piece of the spring piece contacts the outer circumferential direction of the rotating connecting member.

[0026] Optionally, the elastic limiting mechanism includes a torsion spring; the torsion spring is installed on the fixing piece, the first connection end of the torsion spring is connected to the fixing piece; the second connection end of the torsion spring is connected to the center of the end of the rotating connecting member.

[0027] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0028] A tower crane motor according to an embodiment of the present invention, through the setting of an eddy current brake and a fan, eliminates an independent cooling fan, simplifies the structure, reduces the cost, and improves the heat dissipation capacity of the tower crane motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, form a part of this application, and do not constitute a limitation to the embodiments of the present invention. In the drawings:

[0030] Figure 1 It is an overall schematic view of a perspective of the front housing structure.

[0031] Figure 2 It is an overall schematic view of another perspective of the front housing structure.

[0032] Figure 3 It is a front view of the front housing mechanism.

[0033] Figure 4 For Figure 3 It is a schematic structural view of the A-A section.

[0034] Figure 5 It is a schematic structural view of the armature.

[0035] Figure 6 It is a front view structural schematic of the armature.

[0036] Figure 7 For Figure 6 It is a schematic structural view of the B-B section.

[0037] Figure 8 It is a top view of the armature.

[0038] Figure 9 For Figure 8 It is a schematic structural view of the C-C section.

[0039] Figure 10 It is a schematic structural view of the cooling device.

[0040] Figure 11 It is a schematic structural view of the brake.

[0041] Figure 12 It is a schematic structural view of the anti-loosening device of Example 4.

[0042] Figure 13 For Figure 12 It is a partial enlarged view of D in

[0043] Figure 14Schematic structural diagram of the anti-loosening device in Embodiment 5.

[0044] Figure 15 It is Figure 14 Partial enlarged view of E in

[0045] Figure 16 Schematic structural diagram of the wind hood assembly.

[0046] Figure 17 Schematic side view structural diagram of the wind hood assembly.

[0047] Figure 18 Schematic bottom view structural diagram of the wind hood assembly.

[0048] Figure 19 It is Figure 18 Schematic structural diagram of the F-F section in

[0049] Figure 20 Schematic overall structural diagram of the tower crane motor.

[0050] Marks in the attached drawings and corresponding component names:

[0051] 1 - Rain shield, 2 - Upper side of the rain shield, 3 - Lower side of the rain shield, 4 - Strip-shaped ventilation slot, 5 - Armature connection part, 6 - Radial sealing surface, 7 - Axial sealing surface, 8 - Armature connection point, 9 - First wind blade, 10 - Second wind blade, 11 - Ventilation hole, 12 - Axial sealing mating surface, 13 - Radial sealing mating surface, 14 - Shaft connection hole, 15 - Radial air gap, 16 - Axial air gap, 17 - Heat generating component, 18 - Shaft, 19 - Front machine base, 20 - Flange end cover, 21 - Air inlet, 22 - Claw pole combination, 23 - Outer air duct, 24 - Air outlet; 25 - Brake, 26 - Release bracket, 27 - Fixed piece; 28 - Screw, 29 - Armature, 30 - Arc-shaped groove, 31 - Pin with hole, 32 - Connecting piece, 33 - Fixed screw, 34 - Arc-shaped elastic piece, 35 - Torsion spring, 36 - Torsion spring fixing part, 37 - First connection end of the torsion spring; 38 - Second connection end of the torsion spring; 39 - Metal air duct, 40 - Rain shield, 41 - Kidney-shaped hole, 42 - Round hole, 43 - Positioning lug, 44 - Hexagonal rivet nut, 45 - Socket head cap screw; 46 - Claw pole combination, 47 - Armature, 48 - Front machine base, 49 - Junction box, 50 - Stator, 51 - Rotor, 52 - Brake, 53 - Wind hood assembly, 54 - Fan, 55 - Flange end cover. Detailed implementation manners

[0052] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in combination with embodiments and the attached drawings. The illustrative embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0053] Embodiment 1

[0054] Reference Figure 1 and 2 As shown, a front base structure includes a front base; the front base is provided with a rainproof structure for preventing rainwater from entering the motor interior through the front base.

[0055] Reference Figure 1 and 2 As shown, a front base structure includes a front base, and a rainproof structure is provided on the front base.

[0056] The rainproof structure can adopt various implementation manners in the prior art, including but not limited to an umbrella-shaped rainproof structure, etc.

[0057] Optionally, the rainproof structure is a rain cover, the rain cover covers the front base, and one side of the rain cover far from the upper part of the front base extends downward along the upper direction of the front base to the lower part of the front base.

[0058] Reference Figure 1 and 2 As shown, the cross-section of the front base is a circular structure, the rain cover 1 is an annular structure, sleeved on the outer side of the front base, the upper side 2 of the rain cover is connected to the upper part of the outer side of the front base, and the lower side 3 of the rain cover extends downward from the upper part of the outer side of the front base, thereby forming a rain cover structure.

[0059] Optionally, the rainproof structure is integrally formed with the front base.

[0060] Optionally, a plurality of strip-shaped ventilation grooves are provided along the circumferential direction of the outer side of the front base and are arranged in parallel with each other.

[0061] Reference Figure 1-4 As shown, the cross-section of the front base is a circumferential structure, and a plurality of strip-shaped ventilation grooves 4 are uniformly distributed on the circumferential surface of the circumferential structure. The lower side 3 of the rain cover extends downward from the upper part of the lower side of the front base to the outside of the strip-shaped ventilation grooves to block the strip-shaped ventilation grooves and prevent rainwater from entering from the upper part of the strip-shaped ventilation grooves.

[0062] Optionally, the rain cover is an annular structure, the rain cover is sleeved on the front base, and the length of the rain cover covering the strip-shaped ventilation grooves is 40 mm.

[0063] The length of the rain cover covering the strip-shaped ventilation grooves, that is, the distance from the position parallel to the lower side 3 of the rain cover to the upper end of the strip-shaped ventilation grooves, refers to Figure 4 f in

[0064] Optionally, the height of the side of the rain cover far from the upper part of the front base lower than the armature connection 8 is 117 mm.

[0065] The distance between the lower side 3 of the rain shield and the upper edge of the connection part 8 with the armature is 117 mm, referring to d in Figure 3 in

[0066] The armature connection part 5 is used to connect with the armature. At this time, rainwater mainly flows down along the waterproof cover and will not enter the armature through the armature connection part 5.

[0067] Optionally, a sealing surface for forming an air-gap seal in cooperation with the armature of the motor is provided inside the front machine base. The front machine base cooperates with the armature to form an air-gap seal. When the armature rotates, rainwater can be prevented from entering the interior of the motor.

[0068] Optionally, the front machine base is provided with an armature connection part, and the armature connection part is of an annular structure; a sealing surface for forming an air-gap seal in cooperation with the armature of the motor is provided inside the annular structure.

[0069] Thus, rainwater can be prevented from entering the interior of the motor from the connection part between the armature and the front machine base.

[0070] Thus, in the embodiment of the present invention, rain protection for the front machine base is achieved through the rain shield and the sealing surface.

[0071] Optionally, the sealing surface includes a radial sealing surface 6 and an axial sealing surface 7 provided inside the armature connection part. An extension part extending into the armature connection part is provided on the lower side of the armature connection part, and the extension part is of an annular structure; a radial sealing surface 6 is provided on one side of the extension part close to the armature connection part 8; an axial sealing surface 7 is provided on the lower side of the extension part; when the armature connection part is connected to the armature, the sealing surface of the armature cooperates with the radial sealing surface 6 and the axial sealing surface 7 to form an air-gap seal.

[0072] Embodiment 2

[0073] To solve the technical problem that the existing armature does not have a self-cooling structure and function and requires additional equipment for heat dissipation, an embodiment of the present invention provides an armature, including:

[0074] Ventilation holes, which are used to be provided on the armature body to discharge the hot air inside the armature body;

[0075] The first fan blade, which is used to be provided outside the armature body to drive the air in the outer air duct to flow forward along the outside of the armature body to the ventilation slot of the front machine base when the armature body rotates; and

[0076] The second fan blade, which is used to be provided inside the armature body to drive the air inside the armature body to flow out of the armature body through the ventilation holes when the armature body rotates.

[0077] Referring to Figure 5As shown in the figure, the armature includes a first fan blade 9 provided on the outer side surface of the armature body and a second fan blade 10 provided on the inner side surface of the armature body; ventilation holes 11 are provided on the armature body.

[0078] Reference Figure 7 As shown in the figure, the armature is provided with a rotating shaft connection hole 14, which facilitates the connection between the rotating shaft and the armature.

[0079] When the armature rotates driven by the rotating shaft, the second fan blade on the inner side surface of the armature rotates to drive the air inside the armature to start flowing, and the first fan blade 9 on the outer side surface of the armature drives the air outside the armature to start flowing; thus, a certain negative pressure is formed inside the armature, so that the hot air inside the armature is discharged outside the armature, thereby realizing the heat dissipation of the armature.

[0080] To achieve a better heat dissipation effect, reference Figure 5-9 As shown in the figure, optionally, a plurality of ventilation holes are evenly distributed along the outer circumference of the armature body. A first fan blade is provided between adjacent ventilation holes on the outside of the armature body, and a plurality of second fan blades are evenly distributed along the circumference of the hollow cylindrical structure on the inside of the armature body.

[0081] Optionally, each second fan blade is respectively provided on the inner side of the armature body between adjacent ventilation holes.

[0082] Reference Figure 5 As shown in the figure, a ventilation hole is provided on the inner side surface of the armature body between two adjacent second fan blades 10. Thus, when the armature rotates, the air inside the armature can be conveniently discharged through the ventilation hole, thereby playing a better heat dissipation role.

[0083] Optionally, the structure of the armature body is a hollow cylindrical or frustum-shaped structure; a component for connecting with the front machine base is provided on the upper side of the armature body. Axial sealing mating surfaces 12 and radial sealing mating surfaces 13 are provided on this component to form an air gap seal with the sealing surfaces on the corresponding front machine base, thereby enhancing the sealing performance of the overall connection.

[0084] Embodiment 3

[0085] Based on Embodiments 1 and 2, an embodiment of the present invention provides a cooling device, including:

[0086] A front machine base, provided with a ventilation groove; and

[0087] An armature, for being movably sleeved with the front machine base and for being fixedly connected with the rotating shaft;

[0088] The armature includes:

[0089] Ventilation holes, for being provided on the armature body to discharge the hot air inside the armature body;

[0090] The first wind blade is used to be arranged outside the armature body, so that when the armature body rotates, it drives the air in the outer air duct to flow forward along the outside of the armature body to the ventilation slot of the front machine base; and

[0091] The second wind blade is used to be arranged inside the armature body, so that when the armature body rotates, it drives the air inside the armature body to flow out of the armature body through the ventilation holes;

[0092] The ventilation slot is used to communicate with the ventilation holes.

[0093] Reference Figure 10 As shown in Figure 10 In the cooling device shown in, there is a heat - generating component 17. The cooling device includes a front machine base and an armature; the upper part of the armature is movably sleeved with the front machine base. Optionally, the armature is hermetically connected to the front machine base with an air gap;

[0094] The radial sealing mating surface 13 of the armature is hermetically connected to the radial sealing surface 6 of the front machine base through a radial air gap 15;

[0095] The axial sealing mating surface 12 of the armature is hermetically connected to the axial sealing surface 7 of the front machine base through an axial air gap 16.

[0096] Optionally, the axial air gap is 2 - 4 mm; the radial air gap is 1 - 2 mm.

[0097] Through the air - gap seal, rainwater is prevented from entering the motor interior along with the air.

[0098] A shaft connection hole 14 is provided on the central axis of the armature. The rotating shaft 18 is arranged in the shaft connection hole; the armature is connected through the rotating shaft 18, so that the armature is driven to rotate through the rotating shaft 18.

[0099] Optionally, the interior of the armature body communicates with the ventilation holes to form a first air duct, and there is a second air duct between the front machine base and the armature;

[0100] The air - outlet end of the first air duct, the air - outlet end of the second air duct and the ventilation slot communicate;

[0101] The air - inlet end of the first air duct and the air - inlet end of the second air duct communicate through an air inlet.

[0102] Optionally, the front machine base is sleeved on the upper part of the armature, and the upper part of the armature is hermetically connected to the interior of the front machine base through an air gap; there is a gap between the front machine base and the armature, that is, the second air duct.

[0103] Reference Figure 10As shown, the cooling device includes an armature, a front housing 19, a flange end cover 20, and a claw pole assembly 22; the flange end cover 20, the claw pole assembly 22, and the front housing 19 are fixed components. The armature is assembled on the rotating shaft and can rotate with the rotor. The flange end cover is connected to the lower side of the armature; an air inlet 21 is provided on the flange end cover, and the air inlet 21 is respectively communicated with the air inlet end of the second air duct and the air inlet end (lower end) of the first air duct. External air enters the second air duct and the interior of the armature through the air inlet 21; the claw pole assembly fixes the heat-generating component 17 inside the armature; the air entering the interior of the armature through the air inlet 21 becomes hot air after passing through the claw pole assembly 22 and the heat-generating component 17. The hot air rises to the second air blade 10 inside the armature. Due to the rotation of the second air blade, a negative pressure is formed at the claw pole assembly and the heat-generating component, so that the hot air rises into the ventilation holes 11 between the second air blades. Thus, the ventilation holes form the first air duct with the interior space of the armature.

[0104] The air inlet end of the first air duct, that is Figure 10 the air inlet on the flange end cover in

[0105] The air inlet end of the second air duct, that is Figure 10 the lower end of the gap provided between the front housing and the armature in

[0106] The air inlet 21 is respectively communicated with the air inlet end of the first air duct and the air inlet end of the second air duct.

[0107] The air outlet end of the first air duct, the air outlet end of the second air duct, and the ventilation groove are communicated.

[0108] When the rotating shaft drives the armature to rotate, the front housing is relatively stationary. Referring to Figure 10 as shown, the first air duct refers to Figure 10 the direction indicated by the arrow inside the armature in Figure 10 i.e., the outer air duct 23; the second air duct refers to the direction indicated by the arrow in the gap between the front housing and the armature in

[0109] After the air enters from the air inlet 21, it enters the first air duct from the interior of the armature, enters the second air duct from the gap between the front housing and the armature. The air at the upper end of the first air duct passes through the armature ventilation holes, passes through the second air duct, and is discharged from the ventilation groove of the front housing. The air in the second air duct flows upward along the outer wall of the armature and is discharged from the ventilation groove of the front housing, thereby realizing the heat dissipation effect on the heat-generating components inside the cooling device.

[0110] Optionally, in order to achieve a better heat dissipation effect, the ventilation groove is a plurality of strip-shaped ventilation grooves 4 arranged in parallel; the plurality of strip-shaped ventilation grooves arranged in parallel are uniformly distributed in the circumferential direction on the outer side of the front housing.

[0111] The first wind blades are several in number, and the several first wind blades are evenly distributed circumferentially on the outer side of the armature body;

[0112] The second wind blades are several in number, and the several second wind blades are evenly distributed circumferentially on the inner side of the armature body;

[0113] The ventilation holes are several in number, and the several ventilation holes are evenly distributed on the armature body between adjacent second wind blades.

[0114] Optionally, the front machine base is provided with a rain shield, the rain shield is sleeved on the front machine base, and the rain shield covers a part of the strip-shaped ventilation groove to prevent rainwater from entering through a part of the strip-shaped ventilation groove.

[0115] Reference Figure 10 As shown, the rain shield covers the upper part of the strip-shaped ventilation groove 4, thereby forming an air outlet 24 between the rain shield and the outer side of the front machine base; thus, the rain shield not only plays a waterproof role but also plays a role in guiding the flow direction of the air coming out of the strip-shaped ventilation groove.

[0116] Thus, the cooling device of the embodiment of the present invention realizes the heat dissipation of the heat-generating components inside the armature when the armature rotates through the combination of the front machine base and the armature.

[0117] Embodiment 4

[0118] Figure 11 It is a structural schematic diagram of the brake 25.

[0119] Reference Figure 12 As shown, due to the relatively large axial gap, the axial movement space of the release bracket is relatively large. A spring is connected to the middle of the release bracket. When the release bracket is in a free movement state, the release bracket will reciprocate up and down multiple times under the action of the spring, thereby causing the release bracket to vibrate and contact other components of the brake to generate noise. To solve the technical problem that the release bracket of the brake in the prior art is prone to vibration and noise during the operation of the motor and avoid the vibration of the release bracket, the inventor provides an anti-loosening device for the release mechanism of the brake. Refer to Figure 11-13 As shown, the release mechanism includes a release bracket; the anti-loosening device includes an elastic limit mechanism for restricting the movement space of the release bracket, thereby solving the above problems through the elastic limit mechanism.

[0120] Optionally, the release mechanism includes a release bracket, and an arc-shaped groove is provided at one end of the release bracket. The arc-shaped groove is rotatably connected to a rotating connecting member having a connection hole; the fixing member sequentially passes through the armature, the fixing piece and the arc-shaped groove of the brake and is threadedly connected to the connection hole.

[0121] Optionally, the rotating connecting member having a connection hole is a pin with a hole.

[0122] Optionally, the fixing member is a screw.

[0123] Reference Figure 13 As shown, the release bracket includes an arc-shaped groove 30 that fits against the upper arc surface of the pin with hole 31, so that the release bracket can rotate up and down with the pin with hole 31 as the rotation axis through the contact between the arc-shaped groove 30 and the arc surface of the pin with hole 31; the screw 28 passes through the armature 29, the fixing piece 27 and the arc-shaped groove 30 in sequence and then connects to the hole of the pin with hole 31; thus, one end of the release bracket with the arc-shaped groove, the armature 29, the fixing piece 27 and the arc-shaped groove 30 are connected by the screw 28 and the pin with hole 31.

[0124] The fixing piece is a component connected to the end cover of the brake.

[0125] The elastic limiting mechanism includes a spring piece; the spring piece is used to be fixed on the brake and the arc-shaped elastic piece of the spring piece is in circumferential contact with the outer side of the rotating connecting piece.

[0126] Reference Figure 13 As shown, the elastic limiting mechanism includes a spring piece, the spring piece includes a pin with hole 32 and an arc-shaped elastic piece 34, and the spring piece is fixed on the brake 25 by a fixing screw 33. The arc-shaped part of the arc-shaped elastic piece 34 is in contact with the arc surface at the lower part of the outer circumference of the pin with hole.

[0127] When the left end of the release bracket moves downward, the part of the release bracket on the right side of the pin with hole moves upward; the screw 28 drives the armature 29 to move in the direction close to the fixing piece 27. At this time, a gap is generated between the fixing piece 27 and the release bracket 26, and the pin with hole presses down the arc-shaped elastic piece 34. When the release bracket is released, the release bracket returns to its original position under the elastic reset action of the arc-shaped elastic piece 34, avoiding vibration and noise.

[0128] Embodiment 5

[0129] On the basis of Embodiment 4, there is a second implementation manner for the elastic limiting mechanism, that is, the elastic mechanism can also use a torsion spring to replace the spring piece in Embodiment 4.

[0130] Reference Figure 15 As shown, the elastic limiting mechanism includes a torsion spring; the torsion spring is installed on the fixing piece, and the first connection end of the torsion spring is connected to the fixing piece; the second connection end of the torsion spring is connected to the center of the end of the rotating connecting piece.

[0131] The torsion spring is fixed on the fixing piece by a torsion spring fixing member 36, the first connection end 37 of the torsion spring is connected to the fixing piece; the second connection end 38 of the torsion spring is connected to the end of the pin with hole 31; optionally, the second connection end of the torsion spring is connected to the center of the end of the pin with hole 31.

[0132] Thus, when the release bracket moves downward, the first connecting end and the second connecting end of the torsion spring are simultaneously tightened, thereby restricting the downward movement space of the release bracket. When the release bracket is released, the first connecting end 37 and the second connecting end of the torsion spring return to their original states simultaneously, thereby causing the release bracket to return to its original position and preventing vibration and noise from occurring in the release bracket.

[0133] On the basis of Embodiment 4, there is a third implementation manner for the elastic limiting mechanism, that is, the elastic limiting mechanism includes a spring piece and a torsion spring.

[0134] This manner enhances the function of restricting the movement range of the release bracket and the function of preventing vibration and noise from occurring in the release bracket through the dual elastic limiting effects of the spring piece and the torsion spring.

[0135] Specifically, the elastic limiting mechanism includes a spring piece and a torsion spring. The spring piece is used to be fixed on the brake, and the arc-shaped elastic piece of the spring piece is in circumferential contact with the outer side of the rotating connecting piece; the torsion spring is installed on the fixed piece, and the first connecting end of the torsion spring is connected to the fixed piece; the second connecting end of the torsion spring is connected to the center of the end of the rotating connecting piece.

[0136] Reference Figure 13-15 As shown, the elastic limiting mechanism includes a spring piece and a torsion spring 35; the spring piece includes a pin with a hole 32 and an arc-shaped elastic piece 34, and the spring piece is fixed on the brake 25 through a fixing screw 33. The arc-shaped part of the arc-shaped elastic piece 34 is in contact with the arc-shaped surface at the lower part of the outer side of the pin with a hole; the torsion spring is fixed on the fixed piece through a torsion spring fixing member 36, and the first connecting end 37 of the torsion spring is connected to the fixed piece; the second connecting end 38 of the torsion spring is connected to the end of the pin with a hole 31; optionally, the second connecting end of the torsion spring is connected to the center of the end of the pin with a hole 7.

[0137] Thus, when the left end of the release bracket moves downward, the part of the release bracket on the right side of the pin with a hole moves upward; the screw 28 drives the armature 29 to move in the direction close to the fixed piece 27. At this time, a gap is generated between the fixed piece 27 and the release bracket 26. The pin with a hole presses down the arc-shaped elastic piece 34, and the first connecting end and the second connecting end of the torsion spring are simultaneously tightened, thereby restricting the downward movement space of the release bracket. When the release bracket is released, the release bracket returns to its original position under the elastic reset action of the arc-shaped elastic piece 34, and the first connecting end and the second connecting end of the torsion spring return to their original states simultaneously, thereby causing the release bracket to return to its original position and preventing vibration and noise from occurring in the release bracket.

[0138] Embodiment 6

[0139] Reference Figure 16 As shown, a wind hood combination structure, the combination structure includes a metal air duct and a plastic rain shield; the metal air duct and the plastic rain shield are detachably connected.

[0140] Reference Figure 16 As shown, a wind hood combination mechanism includes a metal air duct 39 and a rain shield 40. The metal air duct and the plastic rain shield are detachably connected. Optionally, the metal air duct can be made of metals such as iron and aluminum. The rain shield 40 is made of plastic, with low material cost and high production efficiency through mold production.

[0141] Optionally, the metal air duct and the plastic rain shield are connected by snap fasteners, screw threads, etc.

[0142] Optionally, the metal air duct is a cylindrical structure with openings at both ends; optionally, the metal air duct adopts a straight tube structure, canceling the bottom surface and punching holes of the wind hood.

[0143] Optionally, the metal air duct is made by rolling steel sheets.

[0144] Optionally, the metal air duct 39 is made into a cylindrical structure by rolling a 2-mm-thick steel plate, without sealing at the tail and without punching structure, with simple structure, high production efficiency and low cost.

[0145] Optionally, a plurality of positioning lugs for radially and axially positioning the metal air duct are provided inside the plastic rain shield.

[0146] Reference Figure 16-19 As shown, the plastic rain shield is an annular structure, the cross-section of the metal air duct is a circular structure, and positioning lugs 43 are respectively provided radially and axially on the plastic rain shield. Thus, the metal air duct can be positioned in both the radial and axial directions, facilitating the detachable connection between the plastic rain shield and the metal air duct.

[0147] Optionally, the metal air duct and the plastic rain shield are connected by screws, which can effectively prevent the rain shield from falling off.

[0148] Optionally, a plurality of kidney-shaped holes for connecting the motor are opened at one end of the metal air duct.

[0149] Optionally, the kidney-shaped holes are provided at the upper left of the metal air duct, and several kidney-shaped holes 41 are opened on the circumferential direction on the left side of the air duct for connecting the main motor.

[0150] Optionally, a plurality of through holes are provided on the plastic wind shield, and the through holes are used for detachable connection with the other end of the metal air duct. Optionally, the through holes are round holes 42, and the round holes 42 are used for installing hexagon rivet nuts 44 to connect the plastic rain shield.

[0151] Optionally, internal hexagon screws are provided in the through holes. The internal hexagon screws pass through spring washers, flat washers and the metal air duct in sequence and then fix the plastic wind shield on the metal air duct through hexagon rivet nuts.

[0152] Reference Figure 16-19As shown, a plurality of through holes are provided on the wind shield for installing the hexagon socket head cap screws 45. The hexagon socket head cap screws sequentially pass through the spring washer, flat washer and metal air duct, and then the plastic wind shield is fixed on the metal air duct 39 by the hexagon rivet nut 44.

[0153] In the embodiment of the present invention, the air duct 1 and the rain shield 40 are connected together by the hexagon socket head cap screw 3, spring washer 4, flat washer 5 and hexagon rivet nut 44, so as to effectively prevent the rain shield from falling off.

[0154] Embodiment 7

[0155] On the basis of Embodiments 1-6, with reference to Figure 20 As shown, a tower crane motor includes a motor body; the motor body includes an eddy current brake with a cooling device, and the eddy current brake is arranged at one end of the motor body and connected to one end of the motor rotating shaft; the other end of the motor rotating shaft is connected to a fan.

[0156] With reference to Figure 20 As shown, a tower crane motor includes a motor body; the motor body includes a stator, a rotor and a junction box; the rotor is inside the stator, and the rotor is connected to the rotating shaft; the junction box is connected to the frame of the stator.

[0157] The direction of the screw sleeve hole of the junction box 49 is in the front. When the motor is installed vertically, the screw sleeve hole faces downward, which can effectively prevent rain.

[0158] An eddy current brake is provided at the left end of the motor body; the eddy current brake has a cooling device including a front frame and an armature as described in Embodiments 1-3; the motor body includes a stator 50 and a rotor 51; the rotor is inside the stator; the rotor is connected to the motor rotating shaft; the left end of the motor rotating shaft drives the armature 47 to rotate by connecting with the armature 47; the right end of the motor rotating shaft is connected with a fan 54; the junction box is connected to the frame of the stator; a wind shield combination 53 structure is also provided at the right end of the motor body.

[0159] Thus, the tower crane motor realizes the heat dissipation on the left side of the motor rotating shaft of the tower crane motor through the eddy current brake; the tower crane motor realizes the heat dissipation on the right side of the motor main body through the fan by the rotation of the motor rotating shaft. Thus, this method realizes the coaxial heat dissipation on the left and right sides of the motor body. At the same time, the eddy current brake is placed at the front end of the motor, shortening the length of the ventilation air duct at the rear end of the motor, reducing the heat dissipation requirement at the rear end of the motor, so that an independent cooling fan can be omitted, the structure can be simplified, and the cost can be reduced.

[0160] The armature of the eddy current brake is placed at the front end of the motor, with a compact structure and self - contained heat dissipation and rain protection functions.

[0161] At the rear end of the motor are a brake 52, a blower housing assembly 53, and a fan 54. The fan 54 is installed on the motor shaft and rotates with the shaft without the need for a separate power supply. The fan drives air flow. Cold air enters the interior of the blower housing through the air inlet of the blower housing 53, cools the brake, and then flows out from the air outlet of the blower housing 53 and flows along the heat sinks on the motor stator 50 to cool the motor stator 50.

[0162] Reference Figure 20 As shown, the eddy current brake further includes a claw pole assembly 46; the claw pole assembly is disposed within the armature. The eddy current brake includes a cooling device; the motor includes a flange end cover; the flange end cover 55 communicates with the right side of the armature and the front housing 48; air enters the armature through the air inlet on the flange end cover 55 and rotates under the drive of the rotation of the armature, thereby discharging the heat inside the armature, thus playing a role in dissipating heat from the eddy current brake.

[0163] Optionally, the cooling device includes: a front housing provided with ventilation grooves; and an armature for movably sleeving on the front housing and for connecting to one end of the motor shaft; the armature includes: ventilation holes provided in the armature body to discharge the hot air inside the armature body; a first air blade provided on the outer side of the armature body to drive the air in the outer air duct to flow forward along the outer side of the armature body to the ventilation grooves of the front housing when the armature body rotates; and a second air blade provided on the inner side of the armature body to drive the air inside the armature body to flow out of the armature body through the ventilation holes when the armature body rotates; the ventilation grooves are used to communicate with the ventilation holes.

[0164] For the specific description of the cooling device, refer to the embodiments of the above cooling device.

[0165] Optionally, the armature is hermetically connected to the front housing by an air gap; the front housing is provided with a rain shield, the rain shield is sleeved on the front housing, and the rain shield covers a part of the strip-shaped ventilation grooves to prevent rainwater from entering through a part of the strip-shaped ventilation grooves.

[0166] Optionally, the radial sealing mating surface of the armature and the radial sealing surface of the front housing are hermetically connected by a radial air gap; the axial sealing mating surface of the armature and the axial sealing surface of the front housing are hermetically connected by an axial air gap. The axial air gap is 2 - 4 mm; the radial air gap is 1 - 2 mm.

[0167] Optionally, the other end of the motor body is provided with a blower housing assembly structure; the blower housing assembly structure includes a metal air duct and a plastic rain shield; the metal air duct and the plastic rain shield are detachably connected.

[0168] For the specific description of the structure of the blower housing assembly, refer to the embodiments of the above blower housing assembly structure.

[0169] The brake is provided with a loosening prevention device for the release mechanism, and for the specific description of the loosening prevention device, refer to the embodiments of the above loosening prevention device.

[0170] Thus, for the tower crane motor of the embodiment of the present invention, the eddy current brake is arranged at one end of the motor body, and the fan is arranged at the other end of the motor body; the armature of the eddy current brake is driven to rotate by the rotating shaft, and the fan is driven to rotate by the rotating shaft, realizing the heat dissipation function of the tower crane motor.

[0171] In addition, the front frame structure of the eddy current brake realizes the function of preventing rainwater from entering the motor interior through the air gap sealing connection mode of the rain shield, the front frame and the armature; the wind shield combination structure adopts the design of a plastic rain shield and a metal air duct, effectively preventing the rain shield from falling off; the loosening prevention device of the release mechanism on the brake plays a role in preventing the release bracket from generating vibration and noise.

[0172] Thus, the embodiment of the present invention effectively solves the problem of poor heat dissipation capacity of the tower crane motor in the prior art. At the same time, it can be seen from the embodiment of the present invention that the motor of the embodiment of the present invention adopts technical means such as rain prevention, vibration and noise prevention, and prevention of rain shield falling off; thus, the embodiment of the present invention has the characteristics of good heat dissipation effect and diverse protection functions.

[0173] The above specific implementation manners further elaborate on the purpose, technical solution and beneficial effects of the present invention. It should be understood that the above is only the specific implementation manner of the present invention and is not used to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tower crane motor, characterized in that, It includes a motor body; the motor body includes an eddy current brake with a cooling device, the eddy current brake is arranged at one end of the motor body and is connected to one end of the motor shaft; the other end of the motor shaft is connected to a fan; The cooling device includes: A front frame provided with ventilation slots; and An armature for movably sleeving on the front frame and for connecting to one end of the motor shaft; The armature includes: Ventilation holes provided in the armature body to discharge the hot air inside the armature body; A first wind blade provided on the outer side of the armature body to drive the air in the ventilation holes to flow outside the armature body when the armature body rotates; and A second wind blade provided on the inner side of the armature body to drive the air inside the armature body to flow outside the armature body through the ventilation holes when the armature body rotates; The ventilation slots are used to communicate with the ventilation holes; The other end of the motor body is provided with a wind hood combination structure.

2. The tower crane motor according to claim 1, wherein, A first air duct is formed by the interior of the armature body communicating with the ventilation holes, and a second air duct is provided between the front frame and the armature; The air outlet ends of the first air duct, the air outlet end of the second air duct and the ventilation slots are communicated; The air inlet ends of the first air duct and the second air duct are communicated through an air inlet.

3. The tower crane motor according to claim 1, characterized in that, The ventilation slots are a number of strip-shaped ventilation slots arranged in parallel; a number of strip-shaped ventilation slots arranged in parallel are evenly distributed in the circumferential direction on the outer side of the front frame; The first wind blades are several, and several first wind blades are evenly distributed in the circumferential direction on the outer side of the armature body; The second wind blades are several, and several second wind blades are evenly distributed in the circumferential direction on the inner side of the armature body; The ventilation holes are several, and several ventilation holes are evenly distributed in the armature body between adjacent second wind blades.

4. The tower crane motor according to claim 3, wherein, The armature is connected to the front frame in an airtight manner; the front frame is provided with a rain shield, the rain shield is sleeved on the front frame, and the rain shield covers a part of the strip-shaped ventilation slots to prevent rainwater from entering through a part of the strip-shaped ventilation slots.

5. The tower crane motor according to claim 4, characterized in that, The radial sealing mating surface of the armature and the radial sealing surface of the front frame are connected by radial airtight connection; the axial sealing mating surface of the armature and the axial sealing surface of the front frame are connected by axial airtight connection; the axial air gap is 2-4 mm; the radial air gap is 1-2 mm.

6. The tower crane motor according to claim 1, wherein, The wind hood combination structure includes a metal wind cylinder and a plastic rain shield; the metal wind cylinder and the plastic rain shield are detachably connected.

7. The tower crane motor according to claim 1, wherein, The other end of the motor shaft is also provided with a brake with the function of a side-mounted wind vane; the brake is provided with a loosening prevention device for the release mechanism; the loosening prevention device includes an elastic limiting mechanism for restricting the movement space of the release bracket; the release mechanism includes a release bracket, one end of the release bracket is provided with an arc-shaped groove, and the arc-shaped groove is rotatably connected to a rotating connecting member with a connecting hole; the fixing member sequentially passes through the armature, the fixing piece and the arc-shaped groove of the brake and is threadedly connected to the connecting hole.

8. The tower crane motor according to claim 7, wherein, The elastic limiting mechanism includes a spring piece; the spring piece is used to be fixed on the brake and the arc-shaped spring piece of the spring piece contacts the outer circumference of the rotating connecting member.

9. The tower crane motor according to claim 7, wherein, The elastic limiting mechanism includes a torsion spring; the torsion spring is installed on the fixed piece, and the first connection end of the torsion spring is connected to the fixed piece; the second connection end of the torsion spring is connected to the center of the end of the rotating connecting piece.

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