Soft rubber sleeve for limiting external protector of compressor

Abstract

The utility model relates to the technical field of compressors, in particular to a soft rubber sleeve for limiting an external protector of a compressor, which comprises a soft rubber sleeve body sleeved on the peripheral surface of the protector, the protector comprises an upper end part and a lower end part which are coaxially connected from top to bottom, and the outer diameter of the upper end part is smaller than that of the lower end part. A through hole vertically penetrating through the soft rubber sleeve body is formed in the center of the soft rubber sleeve body and comprises an upper end hole section and a lower end hole section which are coaxially communicated from top to bottom, the diameter of the upper end hole section is gradually increased from top to bottom, and the diameter of the lower end hole section is matched with the outer diameter of the lower end. The maximum diameter of the upper end hole section is smaller than the diameter of the lower end hole section and larger than the outer diameter of the upper end portion, and the minimum diameter of the upper end hole section is smaller than the outer diameter of the upper end portion. The conical inner circumferential face of the upper end hole section and the upper end of the protector extrude each other, the upward escape friction force of the protector is increased, the protector can be prevented from escaping, meanwhile, the upward acting force on the soft rubber sleeve body is reduced, and safety is high.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a soft rubber sleeve for limiting a position of an external protector of a compressor. Background Art

[0002] As a key electrical device of the compressor, the role and performance of the compressor external protector are very important in practical applications. The compressor protector often protects the compressor by monitoring the current and temperature of the compressor. When the current or temperature of the compressor exceeds the corresponding critical value, the protector will automatically cut off the power to protect the compressor. If there is a problem with the protector monitoring data, the actual protection effect will be greatly reduced, and in serious cases it may even endanger personal safety. In actual use, the external protector often senses temperature slower than the built-in protector. At the same time, there is often a gap between the external protector and the surface of the compressor. While the temperature is transmitted to the protector, it also dissipates heat to the outside world, causing the protector to sense hysteresis, so it cannot intervene in time to effectively protect the compressor.

[0003] The external protector is usually made of a soft rubber sleeve that is pressed onto the surface of the compressor. A through hole is provided in the center of the soft rubber sleeve, and the outline size of the through hole is consistent with the outer size of the protector. The through hole of the soft rubber sleeve is sleeved onto the outer peripheral surface of the protector, and pressure is applied to both ends of the soft rubber sleeve to fix it on the surface of the compressor. The protector can be limited and fit to the surface of the compressor by the soft rubber sleeve. However, when fixed on the surface of the compression molding machine, the two ends of the soft rubber sleeve are compressed by force, which may cause the protector to escape from the compressor surface due to the extrusion force, thereby affecting the actual use of the protector and causing electrical safety hazards. Utility Model Content

[0004] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the utility model is to provide a soft rubber sleeve for limiting the position of an external protector of a compressor, which can prevent the protector from escaping.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] The utility model provides a soft rubber sleeve for limiting a compressor external protector, comprising a soft rubber sleeve body for sleeved on the outer peripheral surface of the protector, the protector comprising an upper end portion and a lower end portion coaxially connected from top to bottom, the outer diameter of the upper end portion is smaller than the outer diameter of the lower end portion, a through hole penetrating the soft rubber sleeve body from top to bottom is arranged at the center of the soft rubber sleeve body, the through hole comprises an upper end hole section and a lower end hole section coaxially connected from top to bottom, the diameter of the upper end hole section gradually increases from top to bottom, the diameter of the lower end hole section matches the outer diameter of the lower end portion, the maximum diameter of the upper end hole section is smaller than the diameter of the lower end hole section and larger than the outer diameter of the upper end portion, and the minimum diameter of the upper end hole section is smaller than the outer diameter of the upper end portion.

[0007] Preferably, the lower end of the soft rubber sleeve body is provided with an annular outer edge extending outward from the outer circumferential surface of the soft rubber sleeve body, the upper surface of the annular outer edge is the force-bearing surface, and the lower surface of the annular outer edge is coplanar with the lower end surface of the soft rubber sleeve body and is used to fit the compressor surface.

[0008] Preferably, the height of the lower hole section is L1, the height of the lower end portion is L3, and the following relation is satisfied: L1>L3.

[0009] Preferably, the pressure exerted on the soft rubber sleeve body when it is sleeved on the outer peripheral surface of the protector and pressed on the compressor surface is F, the elastic coefficient of the soft rubber sleeve body is K, and the height L1 of the lower end hole section also satisfies: L1<L3-F / K.

[0010] Preferably, the height of the upper hole section is L2, the height of the upper end portion is L4, and the following relationship is satisfied: L1+L2=L3+L4.

[0011] Preferably, the angle between the inner circumferential surface of the upper hole segment and the lower end surface of the upper hole segment is θ, and satisfies: 60°≤θ<90°.

[0012] Compared with the prior art, the present invention has significant improvements:

[0013] The utility model discloses a soft rubber sleeve for limiting a compressor external protector, which has an upper end hole section of a through hole in the center of the soft rubber sleeve body set to a cone shape, and utilizes the conical inner circumferential surface of the upper end hole section to squeeze the upper end of the protector, thereby increasing the friction force of the protector escaping upwards, and can prevent the protector from escaping, while reducing the upward force on the soft rubber sleeve body, thereby ensuring that the protector fits the surface of the compressor, and there will be no gap or cavity that affects heat transfer and temperature sensing. The utility model has high safety, and is also simpler to install, and there will be no situation where the protector escapes due to over-installation, resulting in the need for multiple installation operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of an external protector for a compressor in an embodiment of the utility model.

[0015] Figure 2 It is a longitudinal sectional schematic diagram of a soft rubber sleeve for limiting a compressor external protector according to an embodiment of the utility model.

[0016] The reference numerals are described as follows:

[0017] 1 Protector

[0018] 11 Upper end

[0019] 12 Lower end

[0020] 13 First step surface

[0021] 14 Terminal block

[0022] 2 Soft rubber cover body

[0023] 21 Through hole

[0024] 211 Upper hole section

[0025] 212 lower end hole section

[0026] 213 Second step surface

[0027] 22 Annular outer edge DETAILED DESCRIPTION

[0028] The following is a further detailed description of the specific implementations of the present invention in conjunction with the accompanying drawings. These implementations are only used to illustrate the present invention, but not to limit the present invention.

[0029] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions 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. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In addition, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0032] like Figure 1 and Figure 2 As shown in FIG. 1 , an embodiment of the soft rubber sleeve for limiting the position of the compressor external protector provided by the utility model is provided. In the description of the utility model, it should be noted that the definition Figure 1 and Figure 2 The upper side of the paper is the "up" side. Figure 1 and Figure 2The lower side of the paper is the "lower" side, and the up and down direction is also called the height direction. "Height" is the extended dimension in the height direction.

[0033] The soft rubber sleeve for limiting the external protector of the compressor in this embodiment includes a soft rubber sleeve body 2, which is used to be sleeved on the outer peripheral surface of the protector 1 to press-fit and fix the external protector 1 on the surface of the compressor. During assembly, the lower surface of the soft rubber sleeve body 2 is in contact with the surface of the compressor, and the lower end surface of the protector 1 is in contact with the surface of the compressor.

[0034] See also Figure 1 The protector 1 includes an upper end 11 and a lower end 12 coaxially connected from top to bottom, the lower end 12 is a temperature-sensitive metal bag of the protector 1, and the upper end 11 is a cover of the protector 1. The upper end 11 and the lower end 12 of the protector 1 are both roughly cylindrical. The outer diameter φe of the upper end 11 is smaller than the outer diameter φd of the lower end 12, so that a first step surface 13 facing upward is formed between the upper end 11 and the lower end 12.

[0035] See also Figure 2, a through hole 21 is provided in the center of the soft rubber sleeve body 2, which passes through the soft rubber sleeve body 2 from top to bottom, and the soft rubber sleeve body 2 is sleeved on the outer peripheral surface of the protector 1 through the through hole 21. The through hole 21 includes an upper hole section 211 and a lower hole section 212 which are coaxially connected from top to bottom. The diameter of the upper hole section 211 gradually increases from top to bottom, so that the upper hole section 211 is conical. The diameter of the lower hole section 212 remains unchanged from top to bottom, so that the lower hole section 212 is cylindrical. The diameter φc of the lower hole section 212 matches the outer diameter φd of the lower end portion 12 of the protector 1, so that the soft rubber sleeve body 2 can be sleeved and matched with the outer peripheral surface of the lower end portion 12 of the protector 1 through the lower hole section 212 of the through hole 21, which plays a role in restraining and fixing the protector 1. The maximum diameter φa of the upper hole section 211 is smaller than the diameter φc of the lower hole section 212, so that a second step surface 213 facing downward is formed between the upper hole section 211 and the lower hole section 212. When assembled, the first step surface 13 of the protector 1 is opposite to the second step surface 213 of the through hole 21. The maximum diameter φa of the upper end hole section 211 is greater than the outer diameter φe of the upper end portion 11 of the protector 1, and the minimum diameter φb of the upper end hole section 211 is smaller than the outer diameter φe of the upper end portion 11 of the protector 1, that is, the outer diameter φe of the upper end portion 11 of the protector 1 is between the minimum diameter φb and the maximum diameter φa of the upper end hole section 211 of the through hole 21 of the soft rubber sleeve body 2, so that the upper end portion 11 of the protector 1 can easily pass through the lower end hole section 212 and the lower end of the upper end hole section 211 from the bottom of the through hole 21 of the soft rubber sleeve body 2, and be limited at the conical inner circumferential surface of the upper end hole section 211. In the process that the soft rubber sleeve body 2 is compressed by force and squeezes the protector 1 laterally, the protector 1 can be given an extrusion force perpendicular to the outer circumferential surface of the protector 1, thereby increasing the sliding friction of the protector 1, and also giving the protector 1 a downward component of force to prevent the protector 1 from leaving the compressor surface and escaping upward.

[0036] Therefore, the soft rubber sleeve for limiting the external protector of the compressor in this embodiment, by setting the upper end hole section 211 of the through hole 21 in the center of the soft rubber sleeve body 2 to a cone shape, and utilizing the conical inner circumferential surface of the upper end hole section 211 to squeeze the upper end portion 11 of the protector 1, the friction force of the protector 1 escaping upward is increased, and the protector 1 can be prevented from escaping, while the upward force on the soft rubber sleeve body 2 is reduced, thereby ensuring that the protector 1 fits well with the surface of the compressor, and there will be no gap or cavity that affects the heat transfer and thus the temperature sensing, the safety is high, and the installation is also simpler, and there will be no situation where the protector 1 escapes due to over-installation, resulting in the need for multiple installation operations.

[0037] In this embodiment, the main body of the soft rubber sleeve body 2 is roughly cylindrical with a through hole 21 in the center. Preferably, the lower end of the soft rubber sleeve body 2 is provided with an annular outer edge 22 extending outward from the outer circumference of the soft rubber sleeve body 2, so that the shape of the soft rubber sleeve body 2 is a truncated cone. The upper surface of the annular outer edge 22 is a force-bearing surface, which is used to withstand the pressure F applied to the soft rubber sleeve body 2 when the soft rubber sleeve body 2 is sleeved on the outer circumference of the protector 1 and pressed on the surface of the compressor. The lower surface of the annular outer edge 22 is coplanar with the lower end surface of the soft rubber sleeve body 2 to form the lower surface of the soft rubber sleeve body 2, and the lower surface of the soft rubber sleeve body 2 is used to fit the surface of the compressor. Therefore, by sleeve-fitting the soft rubber sleeve body 2 on the outer peripheral surface of the protector 1, placing the lower surface of the soft rubber sleeve body 2 on the surface of the compressor, and applying pressure to the upper surface of the annular outer edge 22 at the lower end of the soft rubber sleeve body 2, the soft rubber sleeve body 2 can be fixedly pressed on the surface of the compressor, and the protector 1 can be limited and fixed on the surface of the compressor, so that the lower end surface of the protector 1 is in contact with the surface of the compressor, thereby effectively monitoring the temperature of the compressor.

[0038] In this embodiment, preferably, the height of the lower end hole section 212 of the through hole 21 at the center of the soft rubber sleeve body 2 is L1, and the height of the lower end portion 12 of the protector 1 is L3, and the following conditions are satisfied: L1>L3. This can reduce the relative contact between the first step surface 13 of the protector 1 and the second step surface 213 of the through hole 21 during assembly, or even make them non-contacting, and can reduce the contact force between the first step surface 13 of the protector 1 and the second step surface 213 of the through hole 21, so that the force between the two is small or even non-existent, thereby requiring a small force on the force-bearing surface when used in the waterproof field.

[0039] Furthermore, when the soft rubber sleeve body 2 is sleeved on the outer peripheral surface of the protector 1 and pressed on the surface of the compressor, the pressure it is subjected to is F, and the elastic coefficient of the soft rubber sleeve body 2 is K. According to Hooke's law, the height L1 of the lower end hole section 212 of the through hole 21 at the center of the soft rubber sleeve body 2 is compared with the height L3 of the lower end portion 12 of the protector 1, and it also satisfies: L1<L3-F / K. Therefore, the deformation caused by the actual compression of the soft rubber sleeve body 2 is taken into account, and it can ensure that the upward force on the soft rubber sleeve body 2 is reduced while also playing a good role in limiting and fixing the protector 1.

[0040] In practical applications, the height L1 of the lower end hole section 212 of the through hole 21 at the center of the soft rubber sleeve body 2 can be set to be slightly greater than the height L3 of the lower end portion 12 of the protector 1 .

[0041] In this embodiment, preferably, the height of the upper hole section 211 of the through hole 21 at the center of the soft rubber sleeve body 2 is L2, and the height of the upper end 11 of the protector 1 is L4, and the following conditions are satisfied: L1+L2=L3+L4. This ensures that the wiring head 14 of the protector 1 located above the upper end 11 can maintain a normal height and will not be blocked by the soft rubber sleeve body 2 to affect the wiring of the device.

[0042] In this embodiment, preferably, the angle between the inner circumference of the upper hole section 211 of the through hole 21 at the center of the soft rubber sleeve body 2 and the lower end surface of the upper hole section 211 is θ, and satisfies: 60°≤θ<90°. The size of the angle θ is mainly set according to the strength of the soft rubber sleeve body 2 and the protector 1 and the size of the pressure F on the upper surface of the annular outer edge 22 at the lower end of the soft rubber sleeve body 2. For example, when the material of the soft rubber sleeve body 2 is relatively soft, the material of the protector 1 is relatively hard, and the deformation is relatively large, the angle θ can be appropriately reduced.

[0043] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A soft rubber sleeve for limiting a position of an external protector of a compressor, comprising a soft rubber sleeve body (2) for sleeve-fitting on the outer peripheral surface of a protector (1), wherein the protector (1) comprises an upper end portion (11) and a lower end portion (12) coaxially connected from top to bottom, wherein the outer diameter of the upper end portion (11) is smaller than the outer diameter of the lower end portion (12), and characterized in that: A through hole (21) is provided at the center of the soft rubber sleeve body (2) and passes through the soft rubber sleeve body (2) from top to bottom. The through hole (21) comprises an upper hole section (211) and a lower hole section (212) which are coaxially connected from top to bottom. The diameter of the upper hole section (211) gradually increases from top to bottom. The diameter of the lower hole section (212) matches the outer diameter of the lower end portion (12). The maximum diameter of the upper hole section (211) is smaller than the diameter of the lower hole section (212) and larger than the outer diameter of the upper end portion (11). The minimum diameter of the upper hole section (211) is smaller than the outer diameter of the upper end portion (11).

2. The soft rubber sleeve for limiting the position of the compressor external protector according to claim 1 is characterized in that: The lower end of the soft rubber sleeve body (2) is provided with an annular outer edge (22) extending outward from the outer circumference of the soft rubber sleeve body (2), the upper surface of the annular outer edge (22) is a force-bearing surface, and the lower surface of the annular outer edge (22) is coplanar with the lower end surface of the soft rubber sleeve body (2) and is used to fit the compressor surface.

3. The soft rubber sleeve for limiting the position of the compressor external protector according to claim 1 is characterized in that: The height of the lower end hole section (212) is L1, the height of the lower end portion (12) is L3, and the following relationship is satisfied: L1>L3.

4. The soft rubber sleeve for limiting the position of the compressor external protector according to claim 3 is characterized in that: The pressure exerted on the soft rubber sleeve body (2) when it is sleeved on the outer peripheral surface of the protector (1) and pressed onto the surface of the compressor is F, the elastic coefficient of the soft rubber sleeve body (2) is K, and the height L1 of the lower end hole section (212) also satisfies: L1<L3-F / K.

5. The soft rubber sleeve for limiting the position of the compressor external protector according to claim 3 is characterized in that: The height of the upper hole section (211) is L2, the height of the upper end portion (11) is L4, and the following relationship is satisfied: L1+L2=L3+L4.

6. The soft rubber sleeve for limiting the position of the compressor external protector according to claim 1, characterized in that: The included angle between the inner circumferential surface of the upper end hole section (211) and the lower end surface of the upper end hole section (211) is θ, and satisfies: 60°≤θ<90°.

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