Assembling structure of motor and support and bath heater

Abstract

The utility model belongs to the technical field of motors, and discloses a motor and support assembly structure and a bath heater, the motor and support assembly structure comprises a support and a motor, the motor is installed on the support, two bearings are installed on the support, and a motor rotating shaft on the motor is in interference fit with the bearings. The clearance fit between the bearings and the rotating shaft of the motor is changed into the interference fit, so that when the motor works, the jumping of the output end of the shaft conforms to the specification of the motor, the distance between the two bearings can be shortened to 14 mm, and the height of the bracket can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors, and in particular relates to an assembly structure of a motor and a bracket, and a bathroom heater. Background Art

[0002] The current trend of bathroom heater products is to use external rotor motors. External rotor motors have the advantages of low noise, long life, safety, energy saving, and low cost. The disadvantage is that the moisture-proof bracket used occupies a large space. Especially the height. Due to the limitations of motor design, process, performance, etc., the height has always been above 40mm. The blowing and ventilation effects are not good. The existing technology mainly improves the blowing and ventilation effects by increasing the motor power. The disadvantages are high temperature rise, energy consumption, and great safety hazards.

[0003] At the same time, in the prior art, the distance between the two bearings of the bracket used for the motor of the bathroom heater is 22mm, and there is a clearance fit between the bearing and the motor shaft, which makes it impossible to further reduce the distance between the two bearings to reduce the height of the bracket. If the distance between the bearings is forcibly shortened to reduce the height of the bracket, the risk is relatively high. When the motor is working, the torque on the rear bearing will increase. The shaft output is likely to exceed the runout specification and generate noise. It is also easy to cause the plastic bracket to crack and reduce the life of the motor. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the present utility model is to provide an assembly structure of a motor and a bracket and a bathroom heater. By changing the clearance fit between the bearing and the motor shaft to an interference fit, it is ensured that when the motor is working, the runout of the shaft output end meets the motor specifications. In this way, the distance between the two bearings can be shortened to 14mm, thereby reducing the height of the bracket.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] An assembly structure of a motor and a bracket comprises a bracket and a motor, wherein the motor is mounted on the bracket, two bearings are mounted on the bracket, a motor shaft on the motor and the bearings are interference fit, and a spacing between the two bearings is 14 mm.

[0007] The above technical solution, its principle and technical effect:

[0008] In the prior art, the bracket used for the motor on the bathroom heater has a spacing of h1 between the two bearings on the bracket, h1 is 22mm, and there is a clearance fit between the bearing and the motor shaft. This makes it impossible to further reduce the spacing between the two bearings to reduce the height of the bracket. If the spacing between the bearings is forced to be shortened to reduce the height of the bracket, the risk is relatively high. When the motor is working, the torque on the rear bearing will increase. The shaft output is likely to exceed the runout specification and generate noise. It is also easy to cause the plastic bracket to crack and reduce the life of the motor. In this application, the clearance fit between the bearing and the motor shaft is changed to an interference fit to ensure that the runout of the shaft output end meets the motor specifications when the motor is working. In this way, the spacing between the two bearings can be shortened to 14mm, and the height of the bracket can be reduced.

[0009] Furthermore, the bracket includes a bracket core plate, the upper end of the bracket core plate is fixedly connected with a sleeve along its axis, the middle of the sleeve is provided with a through hole along its axis for the motor shaft to pass through, and the through hole passes through the bracket core plate.

[0010] Furthermore, the upper end of the sleeve is fixedly connected along its axis with a first bearing fixing ring having the same outer diameter as the sleeve, and the inner side of the first bearing fixing ring is provided with a first bearing mounting hole having an inner diameter larger than the inner diameter of the through hole, and one of the bearings is installed in the first bearing mounting hole.

[0011] Furthermore, the lower end of the bracket core plate is fixedly connected to a second bearing fixing ring along its axis, and the inner side of the second bearing fixing ring is provided with a second bearing mounting hole whose inner diameter is larger than the inner diameter of the through hole, wherein another bearing is installed in the second bearing mounting hole.

[0012] Furthermore, the inner wall of the first bearing mounting hole, the inner wall of the second bearing mounting hole and the bearing are bonded together by anaerobic adhesive.

[0013] Furthermore, the peripheral side of the bracket core plate is fixedly connected to the bracket wall, the outer side of the lower end of the bracket wall is fixedly connected to a wing plate, and the wing plate is provided with a fixing hole for fixing screws to pass through.

[0014] Furthermore, a circular arc-shaped sealing groove is concavely formed on the lower surface of the connection between the wing plate and the bracket wall.

[0015] Furthermore, a plurality of reinforcing ribs are evenly distributed along the axial direction at the lower end of the support core plate, one end of the reinforcing rib is fixedly connected to the outer wall of the second bearing fixing ring, and the other end is fixedly connected to the inner wall of the support wall.

[0016] Furthermore, the motor includes an inner stator, which is sleeved on the shaft sleeve and the first bearing fixing ring. An outer rotor is arranged on the outer side of the inner stator, and the outer rotor is fixedly connected to the motor shaft.

[0017] Furthermore, the motor is mounted on the bracket, and the bracket is mounted on the bottom plate inside the bathroom heater.

[0018] The nouns, conjunctions or adjectives involved in the above technical solution are explained as follows:

[0019] Fixed connection refers to a connection in which parts or components are fixed without any relative movement. There are two types of connection: detachable and non-detachable.

[0020] (1) A removable connection is a connection that uses screws, splines, wedge pins, etc. to hold parts together. This type of connection can be disassembled for maintenance without damaging the parts. However, the specifications of the connectors used must be correct (such as the length of the bolts, keys, and wedge pins) and they must be properly tightened.

[0021] (2) Non-detachable connections mainly refer to welding, riveting and tenoning. Since they need to be disassembled by forging, sawing or oxygen cutting for maintenance or replacement, spare parts generally cannot be reused. At the same time, when making connections, attention should be paid to process quality, technical inspection and remedial measures (such as calibration, polishing, etc.).

[0022] A threaded connection refers to a detachable connection in which the connected parts are connected together using threaded parts (or the threaded parts of the connected parts).

[0023] A sliding connection is when two objects are in contact but not fixed and can slide relative to each other.

[0024] A rotational connection is a connection between parts that allows the parts to rotate relative to each other.

[0025] Beneficial effects of the utility model:

[0026] 1. By changing the clearance fit between the bearing and the motor shaft to an interference fit, it is ensured that the runout of the shaft output end meets the motor specifications when the motor is working. In this way, the distance between the two bearings can be shortened to 14mm, thereby reducing the height of the bracket.

[0027] 2. The utility model improves the internal environment conditions of blowing and ventilation by improving the motor structure. At the same time, the motor of the same appearance can be used for new and old bathroom heater products. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 This is a cross-sectional view of the improved overall structure of the embodiment of the utility model;

[0030] Figure 2 It is a schematic diagram of the improved size structure of the embodiment of the utility model;

[0031] Figure 3 This is a top view of the improved support structure of the embodiment of the utility model;

[0032] Figure 4 This is a bottom view of the improved support structure of the embodiment of the utility model;

[0033] Figure 5 This is a schematic diagram of the size structure of an embodiment of the utility model before improvement;

[0034] Figure 6 This is a top view of the improved front bracket structure of an embodiment of the utility model;

[0035] Figure 7 It is a bottom view of the improved front bracket structure of an embodiment of the utility model. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] In the description of the present invention, it should be understood that terms such as "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0038] According to the concept of this application, Figures 1 to 4An embodiment of the assembly structure of a motor and a bracket is described below. Specifically, the assembly is constructed as a split structure, which has a bracket 1, a motor and other components. By cooperating with each other, the clearance fit between the bearing and the motor shaft is changed to an interference fit, ensuring that the runout of the shaft output end meets the motor specifications when the motor is working. In this way, the distance between the two bearings can be shortened to 14 mm, thereby reducing the height of the bracket.

[0039] Embodiment 1

[0040] like Figure 1-4 As shown, an assembly structure of a motor and a bracket includes a bracket 1 and a motor. The motor is mounted on the bracket 1. Two bearings are mounted on the bracket 1. The motor shaft on the motor and the bearings are interference fit. The distance between the two bearings is H1, and H1 is 14 mm.

[0041] In the prior art, the bracket used for the motor on the bathroom heater has a spacing of h1 between the two bearings on the bracket, h1 is 22mm, and there is a clearance fit between the bearing and the motor shaft. This makes it impossible to further reduce the spacing between the two bearings to reduce the height of the bracket. If the spacing between the bearings is forced to be shortened to reduce the height of the bracket, the risk is relatively high. When the motor is working, the torque on the rear bearing will increase. The shaft output is likely to exceed the runout specification and generate noise. It is also easy to cause the plastic bracket to crack and reduce the life of the motor. In this application, the clearance fit between the bearing and the motor shaft is changed to an interference fit to ensure that the runout of the shaft output end meets the motor specifications when the motor is working. In this way, the spacing between the two bearings can be shortened to 14mm, and the height of the bracket can be reduced.

[0042] It should be noted that the electrical performance parameters of the motor can be further optimized to ensure that the plastic bracket of the motor remains unchanged and operates smoothly at room temperature.

[0043] Interference fit, in the process of mechanical installation, many parts need to fit tightly to prevent the connection from falling off or transmitting large torque, so interference technology was born. Interference fit is to use the elasticity of the material to expand and deform the hole and put it on the shaft. When the hole is restored, it generates a clamping force on the shaft to connect the two parts. In the interference fit tolerance zone diagram, the tolerance zone of the hole is below the tolerance zone of the shaft.

[0044] Clearance fit refers to a fit with clearance (including the minimum clearance equal to zero). At this time, the tolerance zone of the hole is above the tolerance zone of the shaft, that is, the actual size of the hole is always greater than or equal to the actual size of the shaft.

[0045] Bearings are an important component in modern mechanical equipment. Its main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy.

[0046] In the illustration of the present application, the bracket 1 includes a bracket core plate 11, the upper end of the bracket core plate 11 is fixedly connected with a sleeve 12 along its axis, and the middle of the sleeve 12 is provided with a through hole 121 along its axis for the motor shaft to pass through, and the through hole 121 penetrates the bracket core plate 11.

[0047] In the illustration of the present application, the upper end of the sleeve 12 is fixedly connected along its axis with a first bearing fixing ring 13 having the same outer diameter as the sleeve 12, and the inner side of the first bearing fixing ring 13 is provided with a first bearing mounting hole 131 having an inner diameter larger than the inner diameter of the through hole 121, wherein one bearing is installed in the first bearing mounting hole 131.

[0048] In the illustration of the present application, the lower end of the bracket core plate 11 is fixedly connected to the second bearing fixing ring 14 along its axis, and the inner side of the second bearing fixing ring 14 is provided with a second bearing mounting hole 141 whose inner diameter is larger than the inner diameter of the through hole 121, wherein another bearing is installed in the second bearing mounting hole 141.

[0049] The inner wall of the first bearing mounting hole 131, the inner wall of the second bearing mounting hole 141 and the bearing are bonded together by anaerobic adhesive. Anaerobic adhesive will not solidify when in contact with oxygen or air. Once isolated from air, coupled with the catalytic effect of the metal surface, it can quickly polymerize and solidify at room temperature to form a strong bond and a good seal. By utilizing the inhibition of oxygen, it can be stored for many years. It is a one-liquid adhesive that can remain liquid in the presence of air at room temperature and can quickly solidify when isolated from air.

[0050] In the illustration of the present application, the peripheral side of the bracket core plate 11 is fixedly connected to the bracket wall 15, and the lower end of the bracket wall 15 is fixedly connected to the outer side with a wing plate 16, and the wing plate 16 is provided with a fixing hole 161 for a fixing screw to pass through. The fixing screw passes through the fixing hole 161 and is fastened to the bottom plate inside the bathroom heater, so that the bracket and the motor can be fixed.

[0051] In the illustration of the present application, the lower surface of the connection between the wing plate 16 and the bracket wall 15 is concave with an arc-shaped sealing groove 156. A rubber ring is installed in the arc-shaped sealing groove 156. When the rear cover plate is covered with the bracket, the internal sealing and waterproofness are increased, and the internal circuit board is further protected.

[0052] In the illustration of the present application, a plurality of reinforcing ribs 17 are evenly distributed along the axial direction at the lower end of the bracket core plate 11, one end of the reinforcing rib 17 is fixedly connected to the outer wall of the second bearing fixing ring 14, and the other end is fixedly connected to the inner wall of the bracket wall 15. The number of reinforcing ribs 17 is preferably 8, and the width of the reinforcing rib 17 is wider than the width of the reinforcing rib on the bracket in the prior art, further improving the mechanical strength of the plastic bracket.

[0053] At the same time, the thickness of the existing bracket core plate can be increased by 0.3 mm, so that the thickness of the bracket core plate 11 in the present application is thicker, and the mechanical strength of the plastic bracket is further improved.

[0054] In the illustration of the present application, the height between the upper surface of the first bearing fixing ring 13 and the lower surface of the wing plate 16 is H2, and H2 is 33 mm. Compared with the height of h2 in the prior art, h2 is 42 mm, which is 9 mm lower.

[0055] In the illustration of the present application, the height between the upper surface of the bracket core plate 11 and the lower surface of the wing plate 16 is H3, and H3 is 18 mm. Compared with the height of h3 in the prior art, h3 is 27 mm, which is 9 mm lower.

[0056] In the illustration of the present application, three threading holes 111 for stator lead wires to pass through are provided on the bracket core plate 11. A circuit board is installed inside the bracket 1, and the three stator lead wires pass through the corresponding threading holes 111 to be connected to the circuit board.

[0057] Embodiment 2

[0058] A bathroom heater, such as the motor and bracket 1 in the first embodiment, the motor is mounted on the bracket 1, and the bracket 1 is mounted on the bottom plate inside the bathroom heater.

[0059] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0060] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. An assembly structure of a motor and a bracket, comprising a bracket (1) and a motor, wherein the motor is mounted on the bracket (1), and two bearings are mounted on the bracket (1), characterized in that: The motor shaft and the bearing on the motor are interference fit.

2. The assembly structure of a motor and a bracket according to claim 1, characterized in that: The bracket (1) comprises a bracket core plate (11), the upper end of the bracket core plate (11) being fixedly connected to a shaft sleeve (12) along its axis, the middle of the shaft sleeve (12) being provided with a through hole (121) along its axis for the motor shaft to pass through, the through hole (121) penetrating the bracket core plate (11).

3. The assembly structure of a motor and a bracket according to claim 2, characterized in that: The upper end of the shaft sleeve (12) is fixedly connected along its axis with a first bearing fixing ring (13) having the same outer diameter as the shaft sleeve (12); the inner side of the first bearing fixing ring (13) is provided with a first bearing mounting hole (131) having an inner diameter larger than the inner diameter of the through hole (121); one of the bearings is mounted in the first bearing mounting hole (131).

4. The assembly structure of a motor and a bracket according to claim 3, characterized in that: A second bearing fixing ring (14) is fixedly connected to the lower end of the support core plate (11) along its axis, and a second bearing fixing ring (14) is provided on the inner side of the second bearing fixing ring (14) with an inner diameter larger than the inner diameter of the through hole (121), wherein another bearing is installed in the second bearing fixing hole (141).

5. The assembly structure of a motor and a bracket according to claim 4, characterized in that: The inner wall of the first bearing mounting hole (131), the inner wall of the second bearing mounting hole (141) and the bearing are bonded together by anaerobic adhesive.

6. The assembly structure of a motor and a bracket according to claim 4, characterized in that: The peripheral side of the bracket core plate (11) is fixedly connected to a bracket wall (15), the lower end of the bracket wall (15) is fixedly connected to a wing plate (16) on the outer side, and the wing plate (16) is provided with a fixing hole (161) for a fixing screw to pass through.

7. The assembly structure of a motor and a bracket according to claim 6, characterized in that: The lower surface of the connection between the wing plate (16) and the bracket wall (15) is concavely provided with an arc-shaped sealing groove (156).

8. The assembly structure of a motor and a bracket according to claim 6, characterized in that: The lower end of the support core plate (11) is evenly distributed with a plurality of reinforcing ribs (17) along the axial direction, one end of the reinforcing rib (17) is fixedly connected to the outer wall of the second bearing fixing ring (14), and the other end is fixedly connected to the inner wall of the support wall (15).

9. The assembly structure of a motor and a bracket according to claim 3, characterized in that: The motor comprises an inner stator, the inner stator being sleeved on the shaft sleeve (12) and the first bearing fixing ring (13), an outer rotor being arranged on the outer side of the inner stator, and the outer rotor being fixedly connected to the motor shaft.

10. A bathroom heater, comprising the motor and the bracket (1) as claimed in any one of claims 1 to 9, characterized in that: The motor is mounted on the bracket (1), and the bracket (1) is mounted on the bottom plate inside the bathroom heater.

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