Special waterproof motor for scissors fork aerial work platform

Abstract

The application relates to the technical field of electric machines, in particular to a waterproof electric machine special for a scissor fork type aerial work platform, the inside of a machine shell is sequentially provided with a stator, a rotor and a rotating shaft, the rear end of the machine shell is sleeved with a rear shell, the rear end of the rotating shaft located in the machine shell is sleeved with a bearing, the bearing is provided with an inner ring and an outer ring, the inside of the machine shell is provided with an axial fixing mechanism connecting the rotating shaft and the inner ring; the inner wall of the machine shell is provided with a side plate, and the inside of the machine shell is provided with a circumferential fixing mechanism connecting the side plate and the outer ring. The electric machine in the scheme is not provided with a front end cover and a front end bearing, the rotating shaft is directly connected with a speed reducer box of the aerial platform vehicle, the axial dimension is reduced, the structure is more compact, the bearing in the scheme is connected with the rotating shaft through the axial fixing mechanism and connected with the side plate through the circumferential fixing mechanism, the bearing is movably installed, and when the bearing cannot be used due to abrasion, the bearing can be conveniently replaced.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and in particular to a waterproof motor specifically designed for scissor lift aerial work platforms. Background Technology

[0002] An electric motor is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. Its main function is to generate driving torque, converting mechanical energy into electrical energy, and serving as a power source for electrical appliances or various machines.

[0003] During operation, bearing wear can cause eccentricity, affecting the normal operation of an electric motor. This is especially true for explosion-proof motors, where bearing wear and eccentricity can lead to high temperatures due to friction at the explosion-proof gap, posing an explosion hazard. Therefore, to ensure the safe use of the motor, worn bearings need to be replaced. However, the installation and removal of existing bearings is time-consuming and labor-intensive, making bearing replacement very inconvenient. Summary of the Invention

[0004] This invention addresses the shortcomings of existing technologies by providing a waterproof motor specifically designed for scissor lift aerial work platforms.

[0005] The present invention solves the above-mentioned technical problems through the following technical means:

[0006] A waterproof motor for scissor lift aerial work platforms includes a housing, inside which a stator, a rotor, and a shaft are sequentially arranged. A rear shell is fitted at the rear end of the housing, and a bearing is fitted at the rear end of the shaft inside the housing. The bearing has an inner ring and an outer ring. An axial fixing mechanism connecting the shaft and the inner ring is provided inside the housing.

[0007] The inner wall of the housing is provided with a side plate, and the housing is provided with a circumferential fixing mechanism that connects the side plate and the outer ring.

[0008] As an improvement to the above technical solution, the axial fixing mechanism includes a platform connected to the end of the rotating shaft. The platform is connected to a second column through a first column. An inner ring is sleeved on the platform and the first column. The second column has a threaded section and is threadedly connected to a first nut. The first nut is sleeved with a first sleeve.

[0009] As an improvement to the above technical solution, the axial fixing mechanism further includes an annular groove formed on the inner ring and a rectangular block disposed between the first column and the second column. The rectangular block is slidably fitted with a sliding sleeve, and a support sleeve is provided on the sliding sleeve, with the support sleeve inserted into the interior of the annular groove.

[0010] As an improvement to the above technical solution, the outer wall thickness of the support sleeve increases sequentially from the movable end to the connection end with the sliding sleeve.

[0011] As an improvement to the above technical solution, a collar is fitted on the second column, a fan blade is connected to the collar, and a bolt is threaded into a threaded through hole on the collar, with the bolt abutting against the second column.

[0012] As an improvement to the above technical solution, the circumferential fixing mechanism includes a second sleeve connected to the side plate. The number of the second sleeves is at least three, and they are distributed in a ring at equal intervals around the bearing. A long rod is connected to the inner wall of the second sleeve. The long rod is movably sleeved with a sleeve that abuts against the outer ring. A spring is connected between the long rod and the sleeve.

[0013] The second sleeve is equipped with a limiting component inside to limit the position of the sleeve.

[0014] As an improvement to the above technical solution, the limiting member includes a pressure rod disposed on the outer wall of the sleeve and a threaded section opened on the inner wall of the second sleeve. The threaded section is threadedly connected to an external threaded sleeve, and a pressure ring is connected to the inner wall of the external threaded sleeve.

[0015] The pressure ring is provided with an inclined section whose inner diameter decreases from left to right, and the pressure rod is in contact with the inclined section.

[0016] As an improvement to the above technical solution, the pressure rod and the sleeve are rotatably connected.

[0017] As an improvement to the above technical solution, a groove matching the sleeve is formed on the outer wall of the outer ring, and the sleeve is inserted into the inside of the groove.

[0018] The beneficial effects of this invention are:

[0019] In this design, the motor does not have a front cover or a front bearing. The shaft is directly connected to the gearbox of the scissor lift aerial work platform, which reduces the axial dimension and makes the structure more compact. It also eliminates a connecting link and improves assembly accuracy.

[0020] In this design, the bearing connects the shaft and inner ring via an axial fixing mechanism and the side plate and outer ring via a circumferential fixing mechanism. The movable installation of the bearing facilitates replacement when it becomes unusable due to wear. Furthermore, when the bearing needs to be replaced, only the rear housing needs to be disassembled, making the operation highly convenient.

[0021] In this axial fixing mechanism, the inner ring abuts against the side wall of the platform, limiting the left side position of the bearing, and the first sleeve abuts against the right end of the inner ring, limiting the right side position of the bearing. The operation is simple and the installation is convenient. The rectangular block and the sliding sleeve are designed to work together so that the first sleeve acts on the inner ring through the sliding sleeve and the support sleeve, preventing the rotation of the inner ring from affecting the installation of the bearing. At the same time, the setting of the support sleeve inserting into the annular groove adds a second support point in addition to the support point where the inner ring contacts the platform, improving the stability of the bearing installation.

[0022] In this week's fixing mechanism, the sleeve clamps and fixes the bearing inside the housing through the outer ring, while also connecting the side plate and the bearing; the limiting component, consisting of a pressure rod, an external threaded sleeve, and a pressure ring, not only achieves the function of installing the bearing, but also allows the bearing to be installed in the middle position of the housing. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the waterproof motor for the scissor-type aerial work platform according to an embodiment of the present invention;

[0024] Figure 2 for Figure 1 Schematic diagram of a local structure in the middle;

[0025] Figure 3 for Figure 2 Schematic diagram of a local structure in the middle;

[0026] Figure 4 This is a schematic diagram of the sliding sleeve and support sleeve structure according to an embodiment of the present invention;

[0027] Reference numerals: 1. Housing; 2. Stator; 3. Rotor; 4. Shaft; 5. Rear shell; 6. Side plate; 7. Bearing; 701. Inner ring; 702. Outer ring; 8. Axial fixing mechanism; 801. Platform; 802. First column; 803. Rectangular block; 804. Second column; 805. Sliding sleeve; 806. Annular groove; 807. Support sleeve; 808. First nut; 809. Circumferential fixing mechanism; 9. Second sleeve; 901. Long rod; 902. Sleeve; 903. Spring; 904. Pressure rod; 905. External threaded sleeve; 906. Pressure ring; 907. Collar; 10. Bolt; 11. Fan blade; 12. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0030] Example

[0031] like Figure 1 As shown, the waterproof motor for scissor lift aerial work platform in this embodiment includes a housing 1. Inside the housing 1, a stator 2, a rotor 3 and a shaft 4 are arranged in sequence. A rear shell 5 is fitted at the rear end of the housing 1. A bearing 7 is fitted at the rear end of the shaft 4 inside the housing 1. An inner ring 701 and an outer ring 702 are provided on the bearing 7. An axial fixing mechanism 8 connecting the shaft 4 and the inner ring 701 is provided inside the housing 1.

[0032] A side plate 6 is provided on the inner wall of the housing 1, and a circumferential fixing mechanism 9 connecting the side plate 6 and the outer ring 702 is provided inside the housing 1.

[0033] In this design, the motor does not have a front cover or a front bearing. The shaft 4 is directly connected to the gearbox of the scissor lift aerial work platform, which reduces the axial dimension and makes the structure more compact. One connecting link is eliminated, improving assembly accuracy. The motor connector in this technical solution is a waterproof connector, and the motor has waterproof performance with a protection level of IP67.

[0034] In this design, the bearing 7 is connected to the rotating shaft 4 and the inner ring 701 via the axial fixing mechanism 8, and to the side plate 6 and the outer ring 702 via the circumferential fixing mechanism 9. The movable installation of the bearing 7 makes it easy to replace the bearing 7 when it becomes worn and unusable. Moreover, when the bearing 7 needs to be replaced, only the rear shell 5 needs to be disassembled, making the operation highly convenient.

[0035] like Figure 1 , 2 As shown in Figures 3 and 4, the axial fixing mechanism 8 includes a platform 801 connected to the end of the rotating shaft 4. The platform 801 is connected to a second column 804 via a first column 802. An inner ring 701 is fitted onto the platform 801 and the first column 802. The second column 804 has a threaded section and is threadedly connected to a first nut 808. The first nut 808 is fitted with a first sleeve 809.

[0036] In this axial fixing mechanism 8, the axial fixing mechanism 8 is set to connect the rotating shaft 4 and the inner ring 701; the bearing 7 is sleeved on the platform 801 and the first column 802, and the inner ring 701 abuts against the side wall of the platform 801 to limit the left position of the bearing 7. The first nut 808 is rotated on the threaded section of the second column 804 until the first sleeve 809 abuts against the right end of the inner ring 701 to limit the right position of the bearing 7. The operation is simple and the installation is convenient.

[0037] The axial fixing mechanism 8 also includes an annular groove 806 formed on the inner ring 701 and a rectangular block 803 disposed between the first column 802 and the second column 804. The rectangular block 803 is slidably sleeved with a sliding sleeve 805, and a support sleeve 807 is disposed on the sliding sleeve 805. The support sleeve 807 is inserted into the interior of the annular groove 806. The outer wall thickness of the support sleeve 807 increases sequentially from the movable end to the connection end with the sliding sleeve 805, so that the support sleeve 807 can be in close contact with the side wall of the annular groove 806, thereby improving the stability of the support.

[0038] In this axial fixing mechanism 8, the rectangular block 803 and the sliding sleeve 805 are configured to cooperate so that the first sleeve 809 acts on the inner ring 701 through the sliding sleeve 805 and the support sleeve 807. This prevents the rotation of the first sleeve 809 from causing the inner ring 701 to rotate, which would affect the installation of the bearing 7. At the same time, the support sleeve 807 is inserted into the annular groove 806, which adds a second support point in addition to the support point where the inner ring 701 contacts the platform 801, thereby improving the stability of the bearing 7 installation.

[0039] like Figure 1 As shown, a collar 10 is fitted onto the second column 804, and a fan blade 12 is connected to the collar 10. A bolt 11 is threaded into a threaded through hole on the collar 10, and the bolt 11 abuts against the second column 804. The fan blade 12 is designed to rotate when the shaft 4 rotates, thereby cooling the motor. The fan blade 12 is mounted on the collar 10, which is fixed to the second column 804 by the bolt 11. When the bearing 7 is replaced, the collar 10, bolt 11, and fan blade 12 are disassembled. The movable installation of the fan blade 12 facilitates the replacement of the bearing 7.

[0040] like Figure 1 , 2 As shown, the circumferential fixing mechanism 9 includes a second sleeve 901 connected to the side plate 6. There are at least three second sleeves 901, which are distributed in a ring at equal intervals around the bearing 7. A long rod 902 is connected to the inner wall of the second sleeve 901. The long rod 902 is movably sleeved with a sleeve 903 that abuts against the outer ring 702. A spring 904 is connected between the long rod 902 and the sleeve 903.

[0041] The second sleeve 901 is equipped with a limiting component inside to limit the position of the sleeve 903.

[0042] The limiting component includes a pressure rod 905 disposed on the outer wall of the sleeve 903 and a threaded section disposed on the inner wall of the second sleeve 901. The threaded section is threadedly connected to an external threaded sleeve 906, and a pressure ring 907 is connected to the inner wall of the external threaded sleeve 906. The pressure ring 907 is provided with an inclined section whose inner diameter decreases from left to right, and the pressure rod 905 contacts the inclined section.

[0043] In this week, after the bearing 7 is installed on the rotating shaft 4 in the fixed mechanism 9, the external threaded sleeve 906 is rotated on the threaded section of the inner wall of the second sleeve 901. The external threaded sleeve 906 drives the pressure ring 907 to rotate synchronously. When the external threaded sleeve 906 drives the pressure ring 907 to rotate and move to the left, under the cooperation of the inclined section on the pressure ring 907 and the pressure rod 905, the movable end of the sleeve 903 moves towards the bearing 7 until it abuts against the outer ring of the outer ring 702.

[0044] The sleeve 903 clamps and fixes the bearing 7 inside the housing 1 through the outer ring 702, and at the same time realizes the connection between the side plate 6 and the bearing 7; the limiting component is composed of a pressure rod 905, an external threaded sleeve 906 and a pressure ring 907, which not only achieves the function of installing the bearing 7, but also allows the bearing 7 to be installed in the middle position of the housing 1.

[0045] The pressure rod 905 and the sleeve 903 are rotatably connected. When the pressure ring 907 rotates, it drives the pressure rod 905 to rotate, changing the sliding friction between the pressure ring 907 and the pressure rod 905 into rolling friction, thus reducing the friction between the components. The outer wall of the outer ring 702 is provided with a groove that matches the sleeve 903. The sleeve 903 is inserted into the groove, which improves the stability of the contact between the sleeve 903 and the outer ring 702.

[0046] It should be noted that, in this document, the use of relational terms such as "first" and "second" is merely for distinguishing one entity or operation from another, and does not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0047] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A waterproof motor for scissor lift aerial work platforms, comprising a housing (1), wherein a stator (2), a rotor (3), and a shaft (4) are sequentially arranged inside the housing (1), and a rear shell (5) is fitted onto the rear end of the housing (1), characterized in that: The shaft (4) is fitted with a bearing (7) at its rear end inside the housing (1). The bearing (7) is provided with an inner ring (701) and an outer ring (702). An axial fixing mechanism (8) connecting the shaft (4) and the inner ring (701) is provided inside the housing (1). The inner wall of the housing (1) is provided with a side plate (6), and the housing (1) is provided with a circumferential fixing mechanism (9) connecting the side plate (6) and the outer ring (702). The axial fixing mechanism (8) includes a platform (801) connected to the end of the rotating shaft (4). The platform (801) is connected to a second column (804) via a first column (802). An inner ring (701) is sleeved on the platform (801) and the first column (802). The second column (804) has a threaded section and is threadedly connected to a first nut (808). The first nut (808) is sleeved with a first sleeve (809). The axial fixing mechanism (8) further includes an annular groove (806) formed on the inner ring (701) and a rectangular block (803) disposed between the first column (802) and the second column (804). The rectangular block (803) is slidably fitted with a sliding sleeve (805). A support sleeve (807) is provided on the sliding sleeve (805), and the support sleeve (807) is inserted into the interior of the annular groove (806). The circumferential fixing mechanism (9) includes a second sleeve (901) connected to the side plate (6). There are at least three second sleeves (901), which are distributed in a ring at equal intervals around the bearing (7). A long rod (902) is connected to the inner wall of the second sleeve (901). The long rod (902) is movably sleeved with a sleeve (903) that abuts against the outer ring (702). A spring (904) is connected between the long rod (902) and the sleeve (903). A limiting member is provided inside the second sleeve (901) to limit the position of the sleeve (903). The limiting component includes a pressure rod (905) disposed on the outer wall of the sleeve (903) and a threaded section disposed on the inner wall of the second sleeve (901). The threaded section is threadedly connected to an external threaded sleeve (906), and a pressure ring (907) is connected to the inner wall of the external threaded sleeve (906). The pressure ring (907) is provided with an inclined section whose inner diameter decreases from left to right, and the pressure rod (905) contacts the inclined section.

2. The waterproof motor for scissor-type aerial work platforms according to claim 1, characterized in that: The thickness of the outer wall of the support sleeve (807) increases sequentially from the movable end to the connection end with the sliding sleeve (805).

3. The waterproof motor for scissor-type aerial work platforms according to claim 1, characterized in that: The second column (804) is fitted with a collar (10), and a fan blade (12) is connected to the collar (10). A bolt (11) is threadedly connected to the threaded through hole on the collar (10), and the bolt (11) abuts against the second column (804).

4. The waterproof motor for scissor-type aerial work platforms according to claim 1, characterized in that: The pressure rod (905) and the sleeve (903) are rotatably connected.

5. The waterproof motor for scissor lift aerial work platforms according to claim 1, characterized in that: The outer ring (702) has a groove on its outer wall that matches the sleeve (903), and the sleeve (903) is inserted into the groove.

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