Double-acting motor

Abstract

The utility model discloses a double-acting motor which comprises the components of a housing which is provided with open side surfaces at the front and rear sides and is internally provided with an accommodating cavity; the two end covers are connected to the front side face and the rear side face of the machine shell in a sealed mode respectively, each end cover is provided with a bearing chamber, and each bearing chamber is provided with a bearing; the power module is installed in the containing cavity, the power module is provided with a rotatable power shaft, and the two ends of the power shaft penetrate through the two bearings respectively and extend out of the two end covers; and the two dustproof covers are connected to the power shaft and tightly abut against the two bearing chambers respectively, a sealing ring is arranged in each bearing chamber, and each sealing ring is located between the corresponding dustproof cover and the corresponding bearing. Due to the fact that the sealing ring and the dustproof cover are arranged on the outer side of the bearing, during machining, metal filings and dust can be firstly isolated outside the bearing chamber by the dustproof cover, machining cooling liquid can be isolated outside the bearing by the sealing ring, and external pollutants are prevented from entering the containing cavity through the bearing.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a double-acting motor. Background Art

[0002] Ordinary sawing motors are mostly single-head settings, and can only install one tool at a time. Different tools need to be frequently replaced to meet different processing requirements. In order to facilitate tool replacement, a tool changing mechanism is also required, which leads to a sharp increase in costs, and the tool changing time also occupies a part of the production time.

[0003] In order to solve the above technical problems, the prior art has developed a double-acting sawing motor based on the ordinary sawing motor. The double-acting sawing motor has two mounting positions, which can be used to install different tools, such as a milling cutter and a saw blade, to meet the composite processing requirements of some workpieces.

[0004] However, since the double-acting sawing motor has two processing stations, the probability of external contaminants entering the motor is doubled. Once there is a problem with the sealing of the motor, the processing coolant will penetrate into the interior of the motor from the bearing, causing damage to the motor. Utility Model Content

[0005] The utility model aims to provide a double-acting motor with excellent sealing performance.

[0006] According to the first aspect of the present invention, the double-acting motor comprises:

[0007] A housing, wherein both the front and rear sides of the housing are provided with open sides, and the interior of the housing is provided with a cavity;

[0008] There are two end covers, which are respectively sealed and connected to the front side and the rear side of the casing, each end cover is provided with a bearing chamber, and each bearing chamber is equipped with a bearing;

[0009] A power module is installed in the cavity, and the power module is provided with a rotatable power shaft, and two ends of the power shaft respectively pass through the bearings located on both sides and extend out of the two end covers;

[0010] There are two dust covers, both of which are connected to the power shaft and are tightly abutted against the two bearing chambers respectively. Each bearing chamber is provided with a sealing ring, and each sealing ring is located between the dust cover and the bearing.

[0011] The double-acting motor according to the embodiment of the utility model has at least the following beneficial effects: since a sealing ring and a dust cover are respectively provided on the outer side of the bearing, metal chips and dust can be first isolated outside the bearing chamber by the dust cover during machining, and even if the machining coolant breaks through the dust cover and begins to penetrate into the bearing chamber, since a sealing ring is provided between the bearing and the dust cover, the machining coolant can be isolated outside the bearing by the sealing ring, thereby preventing external pollutants from entering the cavity through the bearing, so as to extend the service life of the power module; even if there are bearings with waterproof and dustproof functions in the prior art, their procurement cost is relatively high, and although the machining coolant cannot penetrate into the interior of the motor through the bearing, it can also make the lubricating grease of the bearing ineffective, ultimately causing the motor to burn out due to excessive temperature rise.

[0012] According to some embodiments of the utility model, the bearing chamber is provided with a plurality of concentric circular grooves on the side facing the dust cover, and the dust cover is provided with a plurality of annular ridges matching all the concentric circular grooves. Through the above arrangement, the dust cover can bite the bearing chamber tightly, and because the dust cover and the bearing chamber form a plurality of barrier barriers together, the blocking rate of external pollutants can be further improved.

[0013] According to some embodiments of the present invention, specifically, each of the sealing rings is elastic.

[0014] According to some embodiments of the utility model, both ends of each sealing ring are tightly in contact with the dust cover and the bearing. Since the sealing rings are elastic, when the sealing rings are squeezed by the dust cover to tightly contact the bearing, the sealing rings can better fill the space between the dust cover and the bearing through elastic deformation, thereby further improving the blocking rate of external pollutants.

[0015] According to some embodiments of the utility model, in order to prevent the bearing from falling off and shifting due to vibration, each bearing chamber is connected to a bearing pressure cover, and each bearing is located between the sealing ring and the bearing pressure cover.

[0016] According to some embodiments of the utility model, in order to meet the connection between the dust cover and the power shaft, the outer peripheral surface of the power shaft is provided with screw threads, and the dust cover is threadedly connected to the power shaft.

[0017] According to some embodiments of the utility model, in order to connect an external tool, a clamp or a drill chuck is threadedly connected to any end of the power shaft.

[0018] According to some embodiments of the utility model, the housing is provided with a wire hole connected to the cavity, and the wire hole is connected to a cable gland. The wire hole is used for wiring, and the cable gland is used to prevent external contaminants from entering the cavity through the wire hole.

[0019] According to some embodiments of the utility model, the interior of the housing and the interiors of the two end covers are provided with a heat dissipation duct, and the heat dissipation duct has an air inlet and an air outlet connected to the outside. When heat dissipation is required, compressed air is introduced into the heat dissipation duct through the air inlet to take away the heat generated by the power module, and the hot air in the heat dissipation duct leaves from the air outlet to meet the air circulation.

[0020] According to some embodiments of the utility model, the air inlet and the air outlet are both arranged on any one of the end covers, and the air inlet and the air outlet of the end cover are not directly connected to extend the air flow path, thereby further improving the heat dissipation effect.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 It is a three-dimensional structural schematic diagram of a double-acting motor according to an embodiment of the utility model;

[0024] Figure 2 yes Figure 1 A top view of a double-acting motor is shown;

[0025] Figure 3 It is a three-dimensional structural schematic diagram of the casing of an embodiment of the utility model;

[0026] Figure 4 yes Figure 2 A cross-sectional view of a double-acting motor along section line AA is shown.

[0027] In the accompanying drawings: 100-casing, 200-power module, 300-end cover, 110-cavity, 120-internal ventilation channel, 310-boss, 311-O-ring, 320-internal air path, 400-trachea joint, 500-muffler, 210-winding, 220-power shaft, 330-bearing chamber, 230-bearing, 240-clip, 600-dust cover, 700-sealing ring, 331-concentric groove, 610-circular ridge, 340-bearing cover, 130-mounting hole, 800-gland. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0029] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 cannot be understood as a limitation on the present invention.

[0030] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0031] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0032] like Figures 1 to 4As shown, according to the double-acting motor of the first embodiment of the utility model, it includes a housing 100, a power module 200 and two end covers 300. The housing 100 is roughly rectangular, and its outer side surfaces are all smooth. The front side and the rear side of the housing 100 are both open sides and are respectively connected to the two end covers 300. The housing 100 is provided with a cavity 110 and a plurality of internal ventilation channels 120 inside. The cavity 110 and all the internal ventilation channels 120 extend to the front side and the rear side of the housing 100, that is, the cavity 110 and all the internal ventilation channels 120 are connected to the housing 100. In this embodiment, the number of the internal ventilation channels 120 is four, and the four internal ventilation channels 120 are distributed in a matrix around the periphery of the cavity 110, and all the internal ventilation channels 120 are not directly connected to the cavity 110. Since the housing 100 is made of aluminum, it has a high heat transfer efficiency. Therefore, when heat is generated in the cavity 110, the heat will be quickly transferred to all the internal ventilation channels 120. Therefore, the utility model can suppress the temperature rise in the cavity 110 by cooling and dissipating the internal ventilation channels 120.

[0033] Specifically, both end covers 300 are provided with a boss 310 extending into the cavity 110. Since the vertical cross-section of the cavity 110 is circular, the boss 310 is correspondingly set to be annular, and the outer diameter of the boss 310 is slightly smaller than the inner diameter of the cavity 110. The outer peripheral surface of the boss 310 is provided with a continuous sealing groove, and an O-ring 311 is provided in the sealing groove, so that when the end cover 300 and the housing 100 are assembled by bolts, the O-ring 311 can effectively prevent external contaminants from entering the cavity 110 from the connection between the end cover 300 and the housing 100, thereby achieving a sealed connection between the end cover 300 and the housing 100.

[0034] The two end covers 300 are each provided with an internal air circuit 320, and the internal air circuits 320 of the two end covers 300 are connected through the multiple internal ventilation channels 120, so that the interior of the casing 100 and the interior of the two end covers 300 together form a heat dissipation duct, and the heat dissipation duct has an air inlet and an air outlet connected to the outside, the air inlet is connected to an air pipe joint 400, and the air outlet is connected to a muffler 500, and the air inlet and the air outlet are both provided on any one of the end covers 300, but the air inlet and the air outlet of the end cover 300 are not directly connected to extend the air flow path.

[0035] When the double-acting motor needs to be cooled, the air pipe is first inserted into the air pipe joint 400, and the compressed air is introduced into the cooling air duct through the air inlet. Since the air inlet and the air outlet of the end cover 300 are not directly connected, the compressed air needs to flow through the end cover A, the housing 100, the end cover B, the housing 100, the end cover A in sequence, and finally leave from the air outlet. The above-mentioned air flow direction flows through the housing 100 and the two end covers 300. Since the compressed air has a high flow rate in the cooling air duct, it can take away a large amount of heat in a short time. Therefore, this structure can effectively dissipate the heat of the double-acting motor comprehensively.

[0036] In addition, the power module 200 is installed in the cavity 110. The power module 200 can be selected as a conventional double-acting movement, which mainly includes a winding 210, a permanent magnet (not shown in the drawings) and a power shaft 220. The permanent magnet is arranged outside the winding 210. The power shaft 220 is assembled with the winding 210. When the winding 210 is energized, under the control of a driver (not shown in the drawings), the winding 210 can rotate in the magnetic field, thereby driving the power shaft 220 to rotate. The two end caps 300 are each provided with a bearing chamber 330, and a bearing 230 is installed in each of the bearing chambers 330. Two end caps 300 are respectively extended from the two ends of the power shaft 220 and are supported by their respective bearings 230 to achieve a rotational connection of the power shaft 220 and improve the rotation quality of the power shaft 220.

[0037] The outer peripheral surface of the power shaft 220 is provided with screw threads. When the type of tool is a radial processing tool such as a saw blade or a milling cutter, two clips 240 are threadedly connected to any end of the power shaft 220, and a clamping space is formed between the two clips 240. Before installing the tool, the outermost clip 240 is first removed, and then the tool is placed on the power shaft 220. Finally, the removed clip 240 is reinstalled and abutted against the tool to lock the position of the tool on the power shaft 220, so that the tool can rotate with the power shaft 220. When the type of tool is an axial processing tool such as a drill bit or a boring tool, a drill chuck (not shown in the drawings) is threadedly connected to any end of the power shaft 220, and the tool is locked in the drill chuck, so that the tool can rotate with the power shaft 220.

[0038] It should be noted that when the power shaft 220 is threadedly connected to a drill chuck, the rotation direction of the power shaft 220 must be consistent with the thread tightening direction of the drill chuck to prevent the drill chuck from loosening.

[0039] like Figure 4As shown, in order to improve the waterproof and dustproof performance of the double-acting motor, the power shaft 220 is threadedly connected with a dust cover 600 on the outside of the two bearing chambers 330, and each bearing chamber 330 is provided with a sealing ring 700 between the dust cover 600 and the bearing 230. In this embodiment, the sealing ring 700 can be selected as a rubber piston ring, which has elasticity. When the dust cover 600 is screwed and abutted against the bearing chamber 330 by threading, the sealing ring 700 is squeezed by the dust cover 600 to be closely abutted against the bearing 230, and the sealing ring 700 can fill the space between the dust cover 600 and the bearing 230 through elastic deformation, thereby effectively blocking external pollutants outside the bearing 230 and avoiding contact between the bearing 230 and external pollutants.

[0040] Furthermore, since it is difficult for the side of the dust cover 600 to perfectly fit with the side of the bearing chamber 330, even if the dust cover 600 is tightly against the bearing chamber 330, there may be a gap between the two due to tolerance, thereby losing the ability to block external pollutants. In order to solve the above technical problems, the bearing chamber 330 is provided with a plurality of concentric circular grooves 331 on the side facing the dust cover 600, all of which have at least two groove depth specifications, and the dust cover 600 is provided with a plurality of annular convex ridges 610 matching all of the concentric circular grooves 331. Since there are multiple fitting surfaces between the dust cover 600 and the bearing chamber 330, even if there is a large tolerance between the two, at least one fitting surface can be guaranteed to meet the sealing requirements, so that the dust cover 600 can bite the bearing chamber 330, and since the dust cover 600 and the bearing chamber 330 form multiple barrier barriers together, the blocking rate of external pollutants can be further improved.

[0041] With the above structure, since a sealing ring 700 and a dust cover 600 are respectively provided on the outer side of the bearing 230, during machining, metal chips and dust can first be isolated outside the bearing chamber 330 by the dust cover 600. Even if the machining coolant breaks through the dust cover 600 and begins to penetrate into the bearing chamber 330, since a sealing ring 700 is provided between the bearing 230 and the dust cover 600, the sealing ring 700 is tightly abutted against the bearing 230 under the extrusion of the dust cover 600, so that the sealing ring 700 can fill the space between the dust cover 600 and the bearing 230 through elastic deformation. Therefore, the machining coolant can be isolated outside the bearing 230 by the sealing ring 700, preventing external pollutants from entering the cavity 110 through the bearing 230, thereby extending the service life of the power module 200. Even though there is a bearing 230 with waterproof and dustproof function in the prior art, its purchase cost is relatively high. Although the processing coolant cannot penetrate into the interior of the motor through the bearing 230, it can also make the lubricating grease of the bearing 230 ineffective, eventually causing the motor to overheat and burn out.

[0042] In some embodiments of the present invention, in order to prevent the bearing 230 from falling off and shifting due to vibration, each bearing chamber 330 is connected to a bearing cover 340 , and each bearing 230 is located between the sealing ring 700 and the bearing cover 340 .

[0043] like Figures 1 to 3 As shown, in some embodiments of the utility model, in order to install the double-acting motor on the slide of the machine tool, a plurality of mounting holes 130 are provided on the top surface of the housing 100, and all the mounting holes 130 are respectively connected to the two inner ventilation channels 120 located above. During assembly, workers use leak-proof screws to fix the housing 100 and the slide of the machine tool, so that the double-acting motor can move in space with the slide of the machine tool. Since the housing 100 and the slide of the machine tool are connected by leak-proof screws, the compressed air in the heat dissipation duct can be prevented from leaking to the outside from the mounting holes 130.

[0044] In some embodiments of the present invention, in order to meet the wiring requirements of the power module 200, the top surface of the housing 100 is provided with a wire hole connected to the cavity 110, and the wire hole is connected with a cable gland 800, and the cable gland 800 can be selected to have IP5 / 6 specifications. The wire hole is used for wiring to provide power to the power module 200, and the cable gland 800 is used to prevent external contaminants from entering the cavity 110 through the wire hole.

[0045] Furthermore, the air pipe joint 400 is located on the same side of the cable gland 800. Since the air pipe joint 400, the cable gland 800 and the mounting hole 130 are all located on the same side, the air pipe and the outgoing cable can be hidden inside the slide to protect the air pipe and the outgoing cable from being scratched by other components, thereby reducing the failure rate.

[0046] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. Double-acting motor, characterized in that: include: A housing (100) having open side surfaces at both the front and rear sides, and a receiving cavity (110) is provided inside the housing (100); There are two end covers (300), the two end covers (300) are respectively sealed and connected to the front side and the rear side of the housing (100), each end cover (300) is provided with a bearing chamber (330), and each bearing chamber (330) is equipped with a bearing (230); A power module (200) is installed in the cavity (110), the power module (200) is provided with a rotatable power shaft (220), and two ends of the power shaft (220) respectively pass through bearings (230) located on both sides and extend out of the two end covers (300); There are two dust covers (600), both of which are connected to the power shaft (220) and are respectively tightly abutted against the two bearing chambers (330), each of which is provided with a sealing ring (700), and each of which is located between the dust cover (600) and the bearing (230).

2. The double-acting motor according to claim 1, characterized in that: The bearing chamber (330) is provided with a plurality of concentric circular grooves (331) on the side facing the dust cover (600), and the dust cover (600) is provided with a plurality of annular ridges (610) matching all the concentric circular grooves (331).

3. The double-acting motor according to claim 1, characterized in that: Each of the sealing rings (700) is elastic.

4. The double-acting motor according to claim 3, characterized in that: Both ends of each sealing ring (700) are tightly in contact with the dust cover (600) and the bearing (230).

5. The double-acting motor according to claim 1, characterized in that: Each of the bearing chambers (330) is connected to a bearing pressure cover (340), and each of the bearings (230) is located between the sealing ring (700) and the bearing pressure cover (340).

6. The double-acting motor according to claim 1, characterized in that: The outer peripheral surface of the power shaft (220) is provided with screw threads, and the dust cover (600) is threadedly connected to the power shaft (220).

7. The double-acting motor according to claim 6, characterized in that: Any end of the power shaft (220) is threadedly connected with a clip (240) or a drill chuck.

8. The double-acting motor according to claim 1, characterized in that: The housing (100) is provided with a wire hole connected to the cavity (110), and the wire hole is connected to a cable gland (800).

9. The double-acting motor according to claim 1, characterized in that: The interior of the housing (100) and the interiors of the two end covers (300) are provided with a heat dissipation duct, and the heat dissipation duct has an air inlet and an air outlet that are connected to the outside.

10. The double-acting motor according to claim 9, characterized in that: The air inlet and the air outlet are both arranged on any one of the end covers (300), and the air inlet and the air outlet of the end cover (300) are not directly connected.

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