Adjustable speed long shaft explosion-proof motor device

Abstract

The utility model provides a kind of adjustable speed's long shaft explosion-proof motor device, including explosion-proof box, the inside installation of explosion-proof box has motor and speed change mechanism, the output end fixed mounting of speed change mechanism has output shaft, and output shaft penetrates the outer wall of explosion-proof box;Speed change mechanism includes shell, input gear, transmission gear, transmission shaft and sleeve, the inside movable mounting of shell has input gear and transmission gear, input gear is fixedly connected with the output shaft of motor, input gear and transmission gear are mutually engaged, transmission shaft is fixedly connected in the outer wall of transmission gear, the outer wall of transmission shaft is slidably equipped with sleeve, and it solves the poor working condition adaptability, energy waste, equipment loss etc. Technical problem caused by the speed of existing explosion-proof motor cannot be adjusted, can be widely applied in oil exploitation, chemical production, coal mining, natural gas transmission etc. Flammable and explosive dangerous environment, satisfy the diversification demand of different production technology.

Description

Technical Field

[0001] This utility model relates to the field of explosion-proof motor technology, and in particular to an adjustable speed long-shaft explosion-proof motor device. Background Technology

[0002] With social development, in flammable and explosive hazardous environments such as petroleum, chemical, and coal mines, explosion-proof motors, as key power equipment, undertake the important task of driving various types of machinery. Through special explosion-proof design, they effectively prevent the risk of explosion caused by electric sparks and high temperatures generated during motor operation, thus ensuring production safety and stability.

[0003] In practical applications, different production processes and operating conditions have diverse requirements for motor speed. For example, in the process of material mixing, high-speed mixing is required in the early stage to quickly mix the materials, while low-speed mixing may be required in the later stage to ensure uniform mixing and avoid over-mixing. In conveying equipment, the motor speed also needs to be flexibly adjusted according to the characteristics and conveying volume of the materials being conveyed. However, most existing explosion-proof motors cannot adjust their speed, which makes them extremely unsuitable for complex and changing operating conditions. When the actual operating conditions do not match the fixed speed of the motor, it will not only lead to energy waste and increase production costs, but may also affect the normal operation and production efficiency of the equipment. Furthermore, long-term operation at an unsuitable speed can accelerate motor wear, shorten the motor's service life, and bring potential safety hazards. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the above-mentioned technology and provide an adjustable speed long-shaft explosion-proof motor device.

[0005] Therefore, this utility model provides an adjustable speed long shaft explosion-proof motor device, including an explosion-proof box, in which a motor and a speed change mechanism are installed, and an output shaft is fixedly installed at the output end of the speed change mechanism, the output shaft passing through the outer wall of the explosion-proof box;

[0006] The speed change mechanism includes a housing, an input gear, a transmission gear, a drive shaft, and a sleeve. The input gear and the transmission gear are movably installed inside the housing. The input gear is fixedly connected to the output shaft of the motor and meshes with the transmission gear. The drive shaft is fixedly connected to the outer wall of the transmission gear, and the sleeve is slidably fitted onto the outer wall of the drive shaft. The output shaft is movably installed inside the housing and located at the front end of the input gear.

[0007] The transmission mechanism further includes a first gear transmission gear, a second gear transmission gear, a third gear transmission gear, a first drive gear, a second drive gear, and a third drive gear. The outer wall of the sleeve is fixedly connected to the first gear transmission gear, the second gear transmission gear, and the third gear transmission gear from left to right. The outer wall of the output shaft is fixedly connected to the first drive gear, the second drive gear, and the third drive gear from left to right.

[0008] Preferably, a bearing is sleeved on the outer wall of the first gear transmission gear, the bearing being located between the first gear transmission gear and the second gear transmission gear, and an operating handle is fixedly connected to the outer wall of the bearing.

[0009] Preferably, the operation involves penetrating the outer shell and the explosion-proof box, and the outer wall of the explosion-proof box is provided with a first-position limiting groove, a second-position limiting groove and a third-position limiting groove.

[0010] Preferably, a second bearing is fixedly connected to the inner wall of the housing, the second bearing is sleeved on the outer wall of the output shaft, and the second bearing is located between the first gear drive gear and the second gear drive gear.

[0011] Preferably, the drive shaft and the sleeve are slidably connected by a slotted pin.

[0012] Preferably, the outer wall hinges of the explosion-proof box are connected to two sealing doors, and a sealing strip is fixedly installed on the inner wall of the sealing door, and the sealing strip is in contact with the outer wall of the explosion-proof box.

[0013] Preferably, a cooling fan is fixedly installed on the top of the explosion-proof box, and there are multiple cooling fans arranged in a rectangular shape. A filter screen is fixedly installed at the air inlet end of the cooling fan.

[0014] This utility model provides an adjustable speed long-shaft explosion-proof motor device, which has the following beneficial effects:

[0015] Compared with existing technologies, this adjustable speed long-shaft explosion-proof motor device, through a speed-changing mechanism, allows the output shaft to drive the input gear to rotate after the motor starts. The input gear meshes with the transmission gear, thereby driving the transmission shaft to rotate. When speed adjustment is needed, the operator pushes the operating handle, which moves the bearing. Since the bearing is connected to the sleeve, the sleeve slides on the transmission shaft. When the sleeve moves to different positions, different gears of the transmission gears mesh with the drive gear. When the first gear meshes with the first drive gear, their diameters and tooth grooves are the same, and the motor speed is transmitted to the output shaft at the same speed. When the second gear meshes with the second drive gear, because the second drive gear has a larger diameter and more tooth grooves, the motor speed is reduced before being transmitted to the output shaft. When the third gear meshes with the third drive gear, the output shaft speed is further reduced. This achieves multi-level speed adjustment of the motor, which can flexibly adjust the output speed according to different working conditions, greatly improving the adaptability of the explosion-proof motor to complex working conditions, meeting diverse production needs, and avoiding energy waste and equipment wear.

[0016] (2) Compared with the prior art, this adjustable speed long-shaft explosion-proof motor device, through the first-gear limit groove, second-gear limit groove, and third-gear limit groove, allows the operator to push the operating handle to the corresponding gear during motor speed change operation. The operator then engages the operating handle in the corresponding limit groove. These limit grooves limit the operating handle, thereby fixing the position of bearing one and indirectly fixing the position of the sleeve. This ensures that the transmission gear and drive gear of the corresponding gear maintain a stable meshing state, effectively preventing sleeve displacement due to vibration or other factors during motor operation, which could lead to gear disengagement and other faults. This ensures stable and reliable speed after speed change, improves the safety and stability of motor operation, and reduces equipment maintenance frequency and repair costs. Attached Figure Description

[0017] Figure 1 This is a first-view structural schematic diagram of an adjustable speed long-shaft explosion-proof motor device proposed in this utility model.

[0018] Figure 2 This is a second-view structural schematic diagram of an adjustable speed long-shaft explosion-proof motor device proposed in this utility model.

[0019] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0020] Figure 4 This is a schematic diagram of the internal structure of an adjustable speed long-shaft explosion-proof motor device proposed in this utility model.

[0021] Figure 5This is a cross-sectional schematic diagram of the speed change mechanism of an adjustable speed long-shaft explosion-proof motor device proposed in this utility model.

[0022] Figure 6 This is a schematic diagram of the three-speed transmission mechanism in an adjustable-speed long-shaft explosion-proof motor device proposed in this utility model.

[0023] Figure 7 This is a schematic diagram of the speed change mechanism in the second gear of an adjustable speed long-shaft explosion-proof motor device proposed in this utility model.

[0024] Figure 8 This is a schematic diagram of the speed change mechanism in the first gear of an adjustable speed long-shaft explosion-proof motor device proposed in this utility model.

[0025] The markings in the diagram are: 1. Explosion-proof box; 101. First gear limit slot; 102. Second gear limit slot; 103. Third gear limit slot; 2. Motor; 3. Transmission mechanism; 301. Housing; 302. Input gear; 303. Transmission gear; 304. Drive shaft; 305. Sleeve; 306. First gear transmission gear; 307. Second gear transmission gear; 308. Third gear transmission gear; 309. First gear drive gear; 310. Second gear drive gear; 311. Third gear drive gear; 312. Bearing 1; 313. Operating handle; 314. Bearing 2; 4. Sealed door; 5. Output shaft; 6. Cooling fan. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0027] Depend on Figures 1-8 As shown in the figure, this utility model provides an adjustable speed long-shaft explosion-proof motor device, including an explosion-proof box 1. The explosion-proof box 1 serves as the protective shell of the entire device, effectively preventing potential electrical sparks, high temperatures, etc. generated inside from spreading to the external flammable and explosive environment, and providing a safe and reliable operating space for the motor 2 and the speed change mechanism 3. The motor 2 and the speed change mechanism 3 are installed inside the explosion-proof box 1. The motor 2 serves as the power source, providing rotational power for the entire device. An output shaft 5 is fixedly installed at the output end of the speed change mechanism 3. The output shaft 5 passes through the outer wall of the explosion-proof box 1 and is used to transmit the adjusted speed of the speed change mechanism 3 to external equipment to drive the external equipment to operate.

[0028] The transmission mechanism 3 includes a housing 301, an input gear 302, a transmission gear 303, a drive shaft 304, and a sleeve 305. The housing 301 provides installation space and protection for the gears and other components inside the transmission mechanism 3, preventing dust, impurities, etc. from entering and affecting the gear transmission. The input gear 302 and the transmission gear 303 are movably installed inside the housing 301. The input gear 302 is fixedly connected to the output shaft of the motor 2, which can transmit the rotational power of the motor 2. The input gear 302 and the transmission gear 303 mesh with each other, and transmit the power to the drive shaft 304 through gear transmission. The drive shaft 304 is fixedly connected to the outer wall of the transmission gear 303, which plays the role of transmitting power. The sleeve 305 is slidably sleeved on the outer wall of the drive shaft 304. The sleeve 305 can slide on the drive shaft 304, and by driving the transmission gears of different gears to move, it realizes the meshing and switching with the drive gear, thereby adjusting the output speed. The output shaft 5 is movably installed inside the housing 301 and located at the front end of the input gear 302, and is used to receive the adjusted power of the transmission mechanism 3 and output it.

[0029] The transmission mechanism 3 also includes a first-speed transmission gear 306, a second-speed transmission gear 307, a third-speed transmission gear 308, a first-speed drive gear 309, a second-speed drive gear 310, and a third-speed drive gear 311. The outer wall of the sleeve 305 is fixedly connected to the first-speed transmission gear 306, the second-speed transmission gear 307, and the third-speed transmission gear 308 from left to right. The outer wall of the output shaft 5 is fixedly connected to the first-speed drive gear 309, the second-speed drive gear 310, and the third-speed drive gear 311 from left to right. The transmission gears and drive gears of different gears are designed with different diameters and numbers of teeth to achieve different transmission ratios, thereby achieving the purpose of adjusting the speed of the output shaft 5.

[0030] Depend on Figure 4 As shown, this utility model provides an adjustable speed long-shaft explosion-proof motor device. A bearing 312 is sleeved on the outer wall of the first gear 306. The bearing 312 is located between the first gear 306 and the second gear 307. The bearing 312 can reduce the friction when the transmission shaft 304 rotates, and at the same time provide a connection point for the operating handle 313. The operating handle 313 is fixedly connected to the outer wall of the bearing 312. The operator drives the bearing 312 to move by operating the handle 313, which in turn drives the sleeve 305 to move, thereby realizing gear switching.

[0031] Depend on Figures 2-3 As shown in the figure, this utility model provides an adjustable speed long-shaft explosion-proof motor device. The operating handle 313 passes through the outer shell 301 and the explosion-proof box 1, which facilitates the operator to perform speed adjustment operation outside the explosion-proof box 1. The outer wall of the explosion-proof box 1 is provided with a first-gear limit groove 101, a second-gear limit groove 102 and a third-gear limit groove 103, which are used to limit the operating handle 313, fix the gear after speed change, and ensure stable gear meshing.

[0032] Depend on Figure 4 As shown, this utility model provides an adjustable speed long shaft explosion-proof motor device. The inner wall of the housing 301 is fixedly connected to a bearing 314. The bearing 314 is sleeved on the outer wall of the output shaft 5. The bearing 314 is located between the first gear drive gear 309 and the second gear drive gear 310, which can reduce the friction when the output shaft 5 rotates and improve the stability and smoothness of the rotation of the output shaft 5.

[0033] Depend on Figure 4 As shown, this utility model provides an adjustable speed long shaft explosion-proof motor device. The drive shaft 304 and the sleeve 305 are slidably connected by a slotted pin. This connection method ensures that the sleeve 305 can slide smoothly on the drive shaft 304 to realize gear switching, and also ensures that the sleeve 305 will not rotate circumferentially when transmitting power, thus ensuring the accuracy of power transmission.

[0034] Depend on Figure 1 As shown, this utility model provides an adjustable speed long-shaft explosion-proof motor device. The outer wall of the explosion-proof box 1 is hinged to two sealing doors 4. A sealing strip is fixedly installed on the inner wall of the sealing door 4. The sealing strip is in contact with the outer wall of the explosion-proof box 1. Through the design of the sealing door 4 and the sealing strip, the sealing performance of the explosion-proof box 1 can be further enhanced, preventing external flammable and explosive gases from entering the interior of the explosion-proof box 1. At the same time, it can also prevent hazardous substances that may be generated inside from leaking into the external environment.

[0035] Depend on Figures 1-2 As shown in the figure, this utility model provides an adjustable speed long-shaft explosion-proof motor device. A cooling fan 6 is fixedly installed on the top of the explosion-proof box 1. Multiple cooling fans 6 are arranged in a rectangular pattern. A filter screen is fixedly installed at the air inlet end of the cooling fan 6. The cooling fan 6 can accelerate the airflow inside the explosion-proof box 1 and dissipate the heat generated during the operation of the motor 2 and the speed change mechanism 3 in a timely manner, preventing the normal operation of the equipment from being affected by excessive temperature. The filter screen can filter dust and other impurities in the air, preventing them from entering the explosion-proof box 1 and affecting the performance and service life of the equipment.

[0036] Working principle: When in use, first start motor 2. The output shaft of motor 2 starts to rotate, which drives the input gear 302, which is fixedly connected to it, to rotate synchronously. Since the input gear 302 and the transmission gear 303 mesh with each other, the rotational power of the input gear 302 is transmitted to the transmission gear 303 through gear transmission, which in turn drives the transmission shaft 304 to rotate, providing the power basis for subsequent speed change operation.

[0037] When the output shaft 5 speed is required, the operator holds the operating handle 313 and pushes the operating handle 313 to move along the guide direction of the outer wall of the explosion-proof box 1. The operating handle 313 is fixedly connected to the bearing 312, which will drive the bearing 312 to move between the first gear 306 and the second gear 307. Since the bearing 312 is sleeved on the outer wall of the first gear 306, the movement of the bearing 312 will drive the sleeve 305 to slide on the transmission shaft 304.

[0038] When the sleeve 305 moves to engage the first gear transmission gear 306 with the first gear drive gear 309, since the diameter and tooth groove of the first gear transmission gear 306 and the first gear drive gear 309 are the same, according to the gear transmission principle, the driving rotation speed of the motor 2 can be transmitted to the output shaft 5 at the same speed. At this time, the output shaft 5 rotates at the same speed as the motor 2.

[0039] If it is necessary to reduce the speed, continue to push the operating handle 313 to move the sleeve 305 further. When the second gear transmission gear 307 and the second gear drive gear 310 mesh, since the second gear drive gear 310 has a larger diameter and more tooth grooves than the second gear transmission gear 307, according to the gear transmission ratio, the driving rotation speed of the motor 2 will be reduced and transmitted to the output shaft 5, thereby reducing the speed of the output shaft 5.

[0040] Similarly, when the push operation 313 engages the third gear transmission gear 308 with the third gear drive gear 311, the third gear drive gear 311 has a larger diameter and more tooth grooves than the third gear transmission gear 308, and the rotational speed of the output shaft 5 will be further reduced.

[0041] After completing the gear shifting operation, the operating handle 313 is engaged in the first gear limit groove 101, the second gear limit groove 102, or the third gear limit groove 103. These limit grooves will mechanically limit the operating handle 313, thereby fixing the position of the bearing 312 and indirectly fixing the position of the sleeve 305. This ensures that the transmission gear and the drive gear of the corresponding gear maintain a stable meshing state, preventing the sleeve 305 from shifting due to vibration or other factors during the operation of the motor 2. This ensures that the output shaft 5 continuously outputs power at a stable speed to drive the external equipment.

[0042] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0043] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A speed-adjustable long-shaft explosion-proof motor device, comprising an explosion-proof enclosure (1), characterized in that: The explosion-proof box (1) is equipped with a motor (2) and a speed change mechanism (3). The output end of the speed change mechanism (3) is fixedly installed with an output shaft (5), which penetrates the outer wall of the explosion-proof box (1). The speed change mechanism (3) includes a housing (301), an input gear (302), a transmission gear (303), a drive shaft (304), and a sleeve (305). The input gear (302) and the transmission gear (303) are movably installed inside the housing (301). The input gear (302) is fixedly connected to the output shaft of the motor (2). The input gear (302) and the transmission gear (303) mesh with each other. The drive shaft (304) is fixedly connected to the outer wall of the transmission gear (303). The sleeve (305) is slidably sleeved on the outer wall of the drive shaft (304). The output shaft (5) is movably installed inside the housing (301) and located at the front end of the input gear (302). The transmission mechanism (3) further includes a first gear transmission gear (306), a second gear transmission gear (307), a third gear transmission gear (308), a first drive gear (309), a second drive gear (310), and a third drive gear (311). The outer wall of the sleeve (305) is fixedly connected to the first gear transmission gear (306), the second gear transmission gear (307), and the third gear transmission gear (308) from left to right. The outer wall of the output shaft (5) is fixedly connected to the first drive gear (309), the second drive gear (310), and the third drive gear (311) from left to right.

2. The adjustable speed long-shaft explosion-proof motor device according to claim 1, characterized in that, The outer wall of the first gear transmission gear (306) is fitted with a bearing (312), which is located between the first gear transmission gear (306) and the second gear transmission gear (307). An operating handle (313) is fixedly connected to the outer wall of the bearing (312).

3. The adjustable speed long-shaft explosion-proof motor device according to claim 2, characterized in that, The operation involves (313) penetrating the outer shell (301) and the explosion-proof box (1). The outer wall of the explosion-proof box (1) is provided with a first-position limiting groove (101), a second-position limiting groove (102) and a third-position limiting groove (103).

4. The adjustable speed long-shaft explosion-proof motor device according to claim 1, characterized in that, The inner wall of the outer casing (301) is fixedly connected to a bearing (314), which is sleeved on the outer wall of the output shaft (5) and is located between the first gear drive gear (309) and the second gear drive gear (310).

5. The adjustable speed long-shaft explosion-proof motor device according to claim 1, characterized in that, The drive shaft (304) and the sleeve (305) are connected by a slotted pin sliding connection.

6. The adjustable speed long-shaft explosion-proof motor device according to claim 1, characterized in that, The explosion-proof box (1) has two sealing doors (4) connected to the outer wall by hinges. The inner wall of the sealing door (4) is fixedly equipped with a sealing strip, which is in contact with the outer wall of the explosion-proof box (1).

7. The adjustable speed long-shaft explosion-proof motor device according to claim 1, characterized in that, The explosion-proof box (1) is fixedly installed with a cooling fan (6) on the top. There are multiple cooling fans (6) arranged in a rectangular shape. The air inlet end of the cooling fan (6) is fixedly installed with a filter screen.

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