Explosion-proof motor and steering device thereof

Abstract

The invention discloses an explosion-proof motor, which comprises an alternating current motor, an explosion-proof shell, a bearing and a wiring hole, the anti-explosion shell is of a relatively-closed space structure made of metal materials, and the alternating current motor is arranged in the internal space of the anti-explosion shell and used for containing the alternating current motor and conducting anti-explosion isolation. The bearing is arranged at the bottom of the explosion-proof shell, and the alternating current motor is movably arranged in the explosion-proof shell through the bearing; the explosion-proof housing is also provided with a wiring hole, and the wiring hole is used for leading out the wiring of the AC motor. The bottom of the explosion-proof shell is further provided with an output channel communicated with the outside, and the bearing is arranged on the output channel and arranged on the outer surface of an output shaft of the alternating current motor in a sleeving mode to achieve output of driving force. The alternating current motor is installed on the inner side of the anti-explosion shell, and the gap is strictly controlled, so that the anti-explosion requirement is met, the explosion condition caused when the motor operates is avoided, and the problem that mechanical equipment is low in safety in an inflammable and explosive dangerous article environment when the motor is used for operation is solved.

Description

Technical Field

[0001] The invention relates to the technical field of special equipment, and in particular to an explosion-proof motor and a steering device thereof. Background Art

[0002] Today, my country's industrialization process is accelerating, and the design and development of corresponding mechanical equipment is following closely, always ready to provide the complex working conditions brought by industrialization. Especially in recent years, the need to operate in a small space has increased. In order to adapt to this change, the current research and development of mechanical equipment is mostly developed in a refined way.

[0003] With the continuous development of the new energy industry, compared with the traditional driving method, for mechanical equipment driven by motors, the motor is equivalent to the human heart, driving the operation of all parts of the entire mechanical equipment. If there is a problem with the motor, the entire equipment will be paralyzed. Therefore, the protection of the motor is particularly important, especially in most explosion-proof mechanical equipment used in explosive and hazardous places.

[0004] Therefore, in order to cope with the motor application environment in explosion-proof scenarios, designing a motor with explosion-proof function is an issue that needs to be urgently addressed in this field. Summary of the invention

[0005] In order to solve the problem of motor protection in explosive hazardous places in the above-mentioned prior art, the present application provides an explosion-proof casing on the outer layer of the motor to protect the internal motor, thereby playing a protective role.

[0006] The present invention provides an explosion-proof motor, and the specific technical solution is as follows, comprising: an AC motor, an explosion-proof housing, a bearing, and a wiring hole; The explosion-proof housing is a relatively closed space structure made of metal material, and the AC motor is arranged in its internal space to accommodate the AC motor and perform explosion-proof isolation; The bearing is arranged at the bottom of the explosion-proof housing, and the AC motor is movably arranged inside the explosion-proof housing through the bearing; The explosion-proof housing is also provided with the wiring hole, and the wiring hole is used to lead out the wiring of the AC motor; An output channel connected to the outside is also provided at the bottom of the explosion-proof housing. The bearing is arranged on the output channel and sleeved on the outer surface of the output shaft of the AC motor to achieve the output of driving force.

[0007] Preferably, the explosion-proof housing is a split design structure, specifically comprising: an explosion-proof outer shell and an explosion-proof bottom shell; The explosion-proof bottom shell is designed at the bottom and abuts against the bottom of the AC motor; The outer ring of the bearing is clamped and fixed on the explosion-proof bottom shell, and the output channel is arranged at the center of the explosion-proof bottom shell, and the bearing and the output channel are arranged concentrically; The explosion-proof housing is detachably connected to the explosion-proof bottom housing and is sleeved on the outside of the AC motor; The explosion-proof outer shell and the explosion-proof bottom shell are combined to form a hollow structure to accommodate the AC motor.

[0008] Preferably, the explosion-proof outer shell and the explosion-proof bottom shell are detachably connected by combined bolts.

[0009] Preferably, an O-ring is further provided between the contact surfaces of the explosion-proof housing and the explosion-proof bottom housing.

[0010] Preferably, a plurality of wiring holes are provided on the explosion-proof housing, and the size of each wiring hole is set to match the diameter of an actual explosion-proof cable.

[0011] Preferably, a clamping nut is provided on the outer side of the wiring hole to isolate it from the outside, and a rubber sealing ring is also provided between the clamping nut and the contact surface of the wiring hole.

[0012] Preferably, a plurality of wiring holes are arranged along the same straight line on the side wall of the explosion-proof housing.

[0013] Preferably, the gap between the AC motor and the explosion-proof bottom shell is ≤0.3 mm.

[0014] Preferably, the output channel at the outer end of the explosion-proof housing is further provided with a skeleton oil seal at the outlet.

[0015] A steering device, including the explosion-proof motor, and also includes: a steering bridge, a driving gear; The explosion-proof motor is installed above the steering axle. The output shaft of the explosion-proof motor is also equipped with the driving gear, which is engaged with the gear of the steering axle. The explosion-proof motor performs forward and reverse operations according to the received electrical signals, thereby achieving the purpose of steering the steering axle left and right.

[0016] Compared with the prior art, the explosion-proof motor provided by the present technical solution meets the explosion-proof requirements by installing a maintenance-free AC motor inside an explosion-proof housing, strictly controlling the connection gap, performing explosion-proof treatment on the AC cable outlet, and using special explosion-proof cables as connecting cables. This avoids explosions caused by sparks, static electricity, temperature and other factors when the explosion-proof motor is in operation, and solves the problem of low safety of mechanical equipment when using motors in an environment with flammable and explosive dangerous goods. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a front view of an explosion-proof motor in a specific embodiment; Figure 2 It is a side cross-sectional view of an explosion-proof motor; Figure 3 The figure is a top view of an explosion-proof motor.

[0019] The specific figures are: 1. AC motor; 2. Explosion-proof housing; 3. Bearing; 4. Wiring hole; 5. Explosion-proof outer shell; 6. Explosion-proof bottom shell; 7. Combination bolts; 8. O-ring; 9. Rubber sealing ring; 10. Pressing nut; 11. Skeleton oil seal. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] It should be noted that when an element is referred to as being "fixed on" or "set on" another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0022] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0024] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0025] Please refer to Figures 1 to 3 , the technical solution of the present invention is specifically described as an explosion-proof motor, the structure of the explosion-proof motor includes: an AC motor 1, an explosion-proof housing 2, a bearing 3, and a wiring hole 4; like Figure 1 As shown, in this embodiment, the overall structure of the explosion-proof motor is a cylindrical structure, and its outermost structure is the explosion-proof shell 2. The explosion-proof shell 2 is a relatively closed space structure made of metal material. The AC motor 1 is arranged in its internal space to accommodate the AC motor 1 and perform explosion-proof isolation. In this embodiment, the explosion-proof shell 2 made of scripture material and having a closed space can well protect the AC motor 1 arranged inside. Whether it is caused by an external or internal fire source, the AC motor 1 can be well isolated from the flammable and explosive substances in the external environment, thereby avoiding the AC motor 1 from becoming an ignition source in an explosive and dangerous place, and meeting the explosion-proof requirements; Since the AC motor 1 performs rotation output, in order to offset the angular momentum, in this embodiment, as Figure 3 As shown, the bearing 3 for offsetting angular momentum is also provided, and the bearing 3 is provided at the bottom of the explosion-proof housing 2, and the AC motor 1 is movably provided inside the explosion-proof housing 2 through the bearing 3; like Figures 1 to 3 As shown, in order to realize the electrical connection between the AC motor 1 and the outside, the explosion-proof housing 2 is further provided with the wiring hole 4, and the wiring hole 4 is used to lead out the wiring of the AC motor 1; like Figure 3As shown, an output channel connected to the outside is also provided at the bottom of the explosion-proof housing 2, and the bearing 3 is arranged on the output channel and sleeved on the outer surface of the output shaft of the AC motor 1 to realize the output of driving force, which can facilitate the explosion-proof motor to provide a driving force source for other equipment.

[0026] As a preferred example, Figure 3 As shown, in this embodiment, the explosion-proof housing 2 is a split structure design, and the structure of the explosion-proof housing 2 specifically includes: an explosion-proof outer shell 5 and an explosion-proof bottom shell 6; The explosion-proof housing 5 and the explosion-proof bottom housing 6 are arranged up and down, and the explosion-proof bottom housing 6 is arranged at the bottom and abuts against the bottom of the AC motor 1; The bearing 3 is mounted on the explosion-proof bottom shell 6 by clamping the outer ring, and in order to avoid the shaking caused by the rotation of the output shaft of the AC motor 1, the output channel is arranged at the center of the explosion-proof bottom shell 6, and the bearing 3 is arranged concentrically with the output channel to better transmit the driving force of the AC motor 1; The explosion-proof housing 5 is detachably connected to the explosion-proof bottom housing 6 and is sleeved outside the AC motor 1; The explosion-proof housing 5 and the explosion-proof bottom housing 6 are combined to form a hollow structure to accommodate the AC motor 1 .

[0027] Furthermore, in this embodiment, the explosion-proof housing 5 and the explosion-proof bottom housing 6 are detachably connected by a combination bolt 7. Figure 3 As shown, the bolts are moved upward from bottom to top, and the bolts abut against the explosion-proof bottom shell 6 to fasten the explosion-proof outer shell 5 and the explosion-proof bottom shell 6.

[0028] Furthermore, in order to ensure the sealing performance between the explosion-proof housing 5 and the explosion-proof bottom housing 6, in the present embodiment, an O-ring 8 is further provided between the contact surfaces of the explosion-proof housing 5 and the explosion-proof bottom housing 6 to ensure the isolation performance.

[0029] Preferably, in order to better ensure the telecommunication connection of the AC motor 1, a plurality of wiring holes 4 are provided on the explosion-proof casing 5 according to actual use requirements, and the aperture size of each wiring hole 4 is matched and set according to the diameter of the actual explosion-proof cable to ensure the sealing inside the explosion-proof casing 2; specifically, in the present embodiment, two groups of wiring holes 4, one large and one small, are installed on the side wall panel of the explosion-proof casing 5, wherein the large holes are used for connecting the three main lines U / V / W of the maintenance-free motor with the explosion-proof cable, and the small holes are used for connecting the temperature sensor and the motor encoder wiring harness of the AC motor 1 with the explosion-proof cable.

[0030] Further, such as Figure 1 and Figure 3 As shown, in this embodiment, the wiring hole 4 is sealed and isolated from the outside by means of a clamping nut 10 , and in order to ensure the sealing effect, a rubber sealing ring 9 is further provided between the contact surface of the clamping nut 10 and the wiring hole 4 .

[0031] Furthermore, in order to facilitate the cable management of the explosion-proof motor, Figures 1 to 3 As shown, in this embodiment, a plurality of wiring holes 4 are arranged along the same straight line on the side wall of the explosion-proof housing 2. Specifically, the wiring holes 4 with smaller diameters are on the top, and the wiring holes 4 with larger diameters are on the bottom.

[0032] Preferably, in the present embodiment, the gap between the AC motor 1 and the explosion-proof bottom shell 6 is ≤0.3 mm, so that the overall protection level of the explosion-proof motor reaches IP65 level.

[0033] Preferably, the output channel at the outer end of the explosion-proof housing 2 is further provided with a skeleton oil seal 11 at the outlet to prevent dust from entering the interior of the explosion-proof motor and improve the dustproof grade of the explosion-proof motor.

[0034] The present application also provides a steering device including the explosion-proof motor, the steering device also including: a steering bridge, a driving gear; The specific connection relationship is: the explosion-proof motor is installed above the steering axle, the output shaft of the explosion-proof motor is also equipped with the driving tooth, which is meshed with the gear of the steering axle, and the explosion-proof motor performs forward and reverse operations according to the received electrical signal, thereby achieving the purpose of left and right steering of the steering axle.

[0035] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An explosion-proof motor, characterized in that: include: AC motor (1), explosion-proof housing (2), bearing (3), wiring hole (4); The explosion-proof housing (2) is a relatively closed space structure made of metal material, and the AC motor (1) is arranged in its internal space, so as to accommodate the AC motor (1) and perform explosion-proof isolation; The bearing (3) is arranged at the bottom of the explosion-proof housing (2), and the AC motor (1) is movably arranged inside the explosion-proof housing (2) through the bearing (3); The explosion-proof housing (2) is also provided with the wiring hole (4), and the wiring hole (4) is used to lead out the wiring of the AC motor (1); An output channel connected to the outside is also provided at the bottom of the explosion-proof housing (2), and the bearing (3) is arranged above the output channel and sleeved on the outer surface of the output shaft of the AC motor (1) to achieve output of driving force.

2. The explosion-proof motor according to claim 1, characterized in that: The explosion-proof housing (2) is a split-type design structure, specifically comprising: an explosion-proof outer shell (5) and an explosion-proof bottom shell (6); The explosion-proof bottom shell (6) is designed at the bottom and abuts against the bottom of the AC motor (1); The outer ring of the bearing (3) is fixedly connected to the explosion-proof bottom shell (6), and the output channel is arranged at the center of the explosion-proof bottom shell (6), and the bearing (3) and the output channel are arranged concentrically; The explosion-proof housing (5) is detachably connected to the explosion-proof bottom housing (6) and is sleeved on the outside of the AC motor (1); The explosion-proof housing (5) and the explosion-proof bottom housing (6) are combined to form a hollow structure to accommodate the AC motor (1).

3. The explosion-proof motor according to claim 2, characterized in that: The explosion-proof housing (5) and the explosion-proof bottom housing (6) are detachably connected via a combination bolt (7).

4. The explosion-proof motor according to claim 3, characterized in that: An O-type sealing ring (8) is also provided between the contact surfaces of the explosion-proof housing (5) and the explosion-proof bottom housing (6).

5. The explosion-proof motor according to claim 1, characterized in that: A plurality of wiring holes (4) are provided on the explosion-proof housing (2), and the size of each wiring hole (4) is set to match the diameter of an actual explosion-proof cable.

6. The explosion-proof motor according to claim 5, characterized in that: A clamping nut (10) is provided on the outside of the wiring hole (4) to isolate it from the outside, and a rubber sealing ring (9) is also provided between the contact surface between the clamping nut (10) and the wiring hole (4).

7. The explosion-proof motor according to claim 6, characterized in that: A plurality of wiring holes (4) are arranged on the side wall of the explosion-proof housing (2) along the same straight line.

8. The explosion-proof motor according to claim 2, characterized in that: The gap between the AC motor (1) and the explosion-proof bottom casing (6) is ≤0.3 mm.

9. The explosion-proof motor according to claim 8, characterized in that: The output channel at the outer end of the explosion-proof housing (2) is also provided with a skeleton oil seal (11) at the outlet.

10. A steering device, comprising the explosion-proof motor according to any one of claims 1 to 9, characterized in that: The steering device also includes: a steering bridge and a driving gear; The explosion-proof motor is installed above the steering axle. The output shaft of the explosion-proof motor is also equipped with the driving gear, which is engaged with the gear of the steering axle. The explosion-proof motor performs forward and reverse operations according to the received electrical signals, thereby achieving the purpose of steering the steering axle left and right.

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