Protective cover for universal coupling

Abstract

The utility model discloses a universal coupling protective cover which comprises a protective cover body, a telescopic protective cover and a fastener. The shield body is provided with a first end and a second end in the length direction, the first end is used for being installed on a diesel engine flywheel, and the second end is provided with a locking part. The telescopic shield is arranged at the second end and connected with the second end in a telescopic adjusting mode, and a kidney-shaped adjusting hole is formed in the telescopic shield in the length direction of the telescopic shield. The fastener is arranged between the locking part and the kidney-shaped adjusting hole in a penetrating mode so that the telescopic shield can be locked to the second end. By flexibly adjusting the length, potential safety hazards caused by exposure of the rotating part due to the fact that the protective cover is too short are effectively avoided, and meanwhile the tedious procedure of on-site truncation due to the fact that the protective cover is too long is omitted. In addition, the length can be adjusted, size errors generated in the assembling process of units of the same model can be flexibly dealt with, good universality is achieved, the protective cover can be suitable for units of different models, and the situation that a protective cover needs to be customized due to machine type differences is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a universal joint technical field, in particular to a universal joint protective cover. BACKGROUND

[0002] The universal joint is one of the key transmission components in mechanical equipment, mainly used for connecting the shafts of two devices to transmit torque and motion. According to the relevant standards of the state and industry, all rotating parts must be equipped with protective covers to ensure the safe operation of the equipment and protect the personal safety of the surrounding operators. In the market, diesel engine driven fire pump occupies an important share, and its main components include diesel engine 1, fire pump 2, base 3, universal joint 4 and coupling protective cover 5 (as shown in Figure 1 As the driving device, the diesel engine 1 drives the driven device, the fire pump 2, to rotate through the universal joint 4, thereby realizing power transmission. In this process, the coupling protective cover 5 as the external protective shell of the universal joint 4 undertakes the key function of personal safety protection. If the universal joint 4 breaks down during the operation of the equipment, the lack of the coupling protective cover 5 will directly cause harm to the surrounding equipment or on-site personnel. Therefore, according to the relevant provisions in GB 6245 "Fire Pump", it is clearly required that the universal joint must be equipped with a coupling protective cover to minimize the harm to the operators and the surrounding environment in the event of an accident.

[0003] At present, the universal joint protective cover with fixed length and non-adjustable is generally used in the market. However, this design has inconvenience and safety hazards in the installation process. If the length of the universal joint protective cover is too short, some parts of the rotating part are still exposed, which has safety hazards and may cause the operator to accidentally touch the exposed part, thereby causing harm; on the contrary, if the length of the universal joint protective cover is too long, it must be cut short during installation to be normally installed, which not only prolongs the installation time, but also increases the complexity of the operation.

[0004] Due to the fixed length and non-adjustability, different types of diesel engine units cannot share the same specification of universal joint protective cover, thereby affecting the universality of the universal joint protective cover. In addition, due to the existence of assembly error, the same type of diesel engine unit may also not be able to use the same specification of universal joint protective cover, further reducing its flexibility. INVENTION CONTENTS

[0005] To solve the above technical problems, the purpose of the utility model is to provide a universal joint protective cover.

[0006] The technical scheme provided by the utility model is as follows:

[0007] A universal joint protective cover comprises:

[0008] a shroud body having a first end and a second end along a length direction of the shroud body, the first end being configured to be mounted on a diesel engine flywheel, and the second end being provided with a locking portion;

[0009] a telescopic shroud provided on the second end and being telescopically adjustable connected with the second end, the telescopic shroud being provided with a waist-shaped adjusting hole along a length direction of the telescopic shroud;

[0010] a fastener provided between the locking portion and the waist-shaped adjusting hole to lock the telescopic shroud on the second end.

[0011] Further, the locking portion is provided with a press-in nut.

[0012] The fastener includes a bolt, a flat washer and a spring washer, the bolt being connected with the press-in nut through the spring washer, the flat washer and the waist-shaped adjusting hole in sequence.

[0013] Further, the second end is provided with a plurality of locking portions around a periphery of the second end, the telescopic shroud is provided with a plurality of waist-shaped adjusting holes corresponding to the plurality of locking portions around a periphery of the telescopic shroud, and the fastener is matched with the number of the locking portions and the waist-shaped adjusting holes.

[0014] Further, the telescopic shroud has a leading end and a trailing end along the length direction of the telescopic shroud, the leading end is provided with a bearing body mounting hole, and a rubber sealing strip is arranged in the bearing body mounting hole.

[0015] Further, the shroud body includes:

[0016] a first portion;

[0017] a second portion provided opposite to the first portion;

[0018] a third portion connected between the first portion and the second portion through a connecting assembly;

[0019] a fourth portion connected between the first portion and the second portion through a connecting assembly and provided opposite to the third portion.

[0020] Further, the first portion, the second portion, the third portion and the fourth portion each include a side plate and a sector plate provided close to the first end, four side plates are arranged to form a rectangular protection cavity, and four sector plates are arranged to form a circular fixing disc, and the first end is mounted on the diesel engine flywheel through the circular fixing disc.

[0021] Further, the first portion and the second portion each further include a folded edge located on opposite sides of a corresponding side plate, and the connecting assembly includes:

[0022] A press-in nut is arranged on the folded edge;

[0023] A connecting hole is arranged on the side plate of the third part and the fourth part;

[0024] A locking column is connected between the press-in nut and the connecting hole.

[0025] Further, the first part, the second part, the third part and the fourth part are all installed obliquely, and the first part and the third part are located above the fourth part and the second part respectively.

[0026] Further, the first part and the third part are both dustproof surfaces, and the second part and the fourth part are both heat dissipation surfaces provided with heat dissipation holes.

[0027] Further, the material of the shroud body and the telescopic shroud is aluminum alloy material.

[0028] Compared with the prior art, the universal joint protector provided by the embodiment of the utility model has at least the following technical effects:

[0029] The universal joint protector comprises a shroud body, a telescopic shroud and a fastener; the shroud body has a first end and a second end along the length direction thereof, the first end is used for being installed on a diesel engine flywheel, and the second end is provided with a locking portion; the telescopic shroud is arranged on the second end and is in telescopic adjustment connection with the second end, and the telescopic shroud is provided with a waist-shaped adjustment hole along the length direction thereof; and the fastener is arranged between the locking portion and the waist-shaped adjustment hole to lock the telescopic shroud on the second end. The structure makes the length of the universal joint protector adjustable according to actual requirements, so that the installation requirements of the unit are better adapted. By flexibly adjusting the length, the safety hidden danger caused by the exposure of the rotating part due to the too short shroud is effectively avoided, and the cumbersome process of cutting the shroud on site due to the too long shroud is also avoided, so that the installation time and the operation complexity are reduced. In addition, the design of the adjustable length can flexibly cope with the size error of the same type unit in the assembly process, so that the adaptability and the installation tolerance range of the shroud are improved. Further, the design of the adjustable length also has good universality, and can be applied to units of different types, so that the situation of customizing the shroud due to the difference between the types is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments described in the utility model, and those skilled in the art can obtain other drawings according to these drawings without creating creative labor.

[0031] Figure 1 It is a structural schematic view of the diesel engine driven fire pump in the prior art;

[0032] Figure 2 It is an explosion structural schematic view of the universal joint protector in the embodiment of the utility model;

[0033] Figure 3 It is a structural schematic view of the universal joint protector in the embodiment of the utility model;

[0034] Figure 4 It is a structural schematic view of the telescopic protector half in the embodiment of the utility model.

[0035] Reference signs: 1, diesel engine;2, fire pump;3, base;4, universal joint;5, joint protector;

[0036] 10, protector main body;11, first end;12, second end;121, locking part;13, first part;14, second part;15, third part;16, fourth part;17, connecting assembly;18, heat dissipation hole;20, telescopic protector;21, waist-shaped adjusting hole;22, half;23, bearing body mounting hole;24, rubber sealing strip;30, fastener. DETAILED DESCRIPTION

[0037] In order to make the technical personnel in the art better understand the technical solutions in the utility model, the technical solutions in the embodiments of the utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary technical personnel in the art without creative labor are within the scope of protection of the utility model.

[0038] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or indirectly on the other element;When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0039] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation to the utility model.

[0040] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and should not be construed as implying or suggesting relative importance or an indicated number of technical features. Thus, features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of", "several" is two or more, unless otherwise explicitly specified.

[0041] It should be understood that the structures, proportions, sizes, etc. shown in the drawings of the present application are only used to cooperate with the disclosed content, to be understood and read by those skilled in the art, and do not have technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0042] At present, the length-fixed and non-adjustable universal coupling protective cover is widely used in the market. However, this design often has the following problems in the installation process:

[0043] (1) The length-fixed and non-adjustable design of the universal coupling protective cover will cause inconvenience and safety hazards in installation. Specifically, if the length of the universal coupling protective cover is too short, some parts of the rotating part are still exposed, and the exposed parts have safety hazards, which may cause the operator to accidentally touch the exposed parts, thereby causing injury. On the contrary, if the length of the universal coupling protective cover is too long, interference may occur, and the length must be redesigned and shortened for normal installation, which not only prolongs the installation time, but also increases the complexity of the operation. The problem of too long or too short length of the universal coupling protective cover can be solved by measuring the length of the universal coupling protective cover according to the actual situation after the installation of the unit, and producing the universal coupling protective cover according to the length. However, this method will cause the unit to be produced after the production and assembly of the universal coupling protective cover, which will prolong the production cycle and is not conducive to the product to seize the market.

[0044] (2) The fixed length of the universal coupling protective cover cannot be adjusted, so that different types of diesel engine units cannot share the same size universal coupling protective cover, thereby affecting the versatility of the universal coupling protective cover, and large-scale production and standardized production cannot be realized. In addition, due to the existence of assembly errors, the fixed length of the universal coupling protective cover cannot be adjusted, so that the same type of diesel engine unit may also not be able to use the same size universal coupling protective cover, thereby reducing the flexibility of the universal coupling protective cover. Specifically, in the production process of the unit, the pump is usually installed on the base first, then the diesel engine and the universal coupling are installed, and finally the coupling protective cover is installed. Since all assembly errors are concentrated on the length of the universal coupling protective cover, the same type of diesel engine unit may not be able to use the same size universal coupling protective cover due to assembly error problems.

[0045] Therefore, referring to the accompanying drawings Figure 2 to the accompanying drawings Figure 4 An embodiment of the utility model provides a kind of universal coupling protective cover, including shield main body 10, telescopic shield 20 and fastener 30;Shield main body 10 has first end 11 and second end 12 along its length direction, first end 11 is used to be installed on diesel engine flywheel, and second end 12 is provided with locking portion 121;Telescopic shield 20 is set to second end 12, and with second end 12 it is telescopic adjustable connection, telescopic shield 20 is provided with waist-shaped adjusting hole 21 along its length direction;Fastener 30 is arranged between locking portion 121 and waist-shaped adjusting hole 21, to lock telescopic shield 20 in second end 12.In the installation process of universal coupling protective cover, the length of universal coupling protective cover can be adjusted according to actual required length, so that it is better adapted to the actual requirement of unit.Specific operation mode is: when the length of universal coupling protective cover is adjusted, first loosen fastener 30, then push or pull telescopic shield 20, so that it is retracted or extended along the length direction of shield main body 10.When telescopic shield 20 moves to the desired target position, fastener 30 is tightened, and telescopic shield 20 is locked to second end 12.This length adjustment mode has the characteristics of simplicity and intuition, and is more convenient to operate, so that universal coupling protective cover can quickly adapt to the size requirement of different types of units or the size requirement of different assembly errors of the same type of unit, avoiding the cumbersome process of cutting or customizing different length protective covers in the prior art, in which the length is fixed and cannot be adjusted.In addition, this mode not only saves installation time, but also improves flexibility and versatility, can realize large-scale production and standardized production, and meets the diversified installation needs.

[0046] In this embodiment, the universal joint protector cover includes a cover body 10, an extension cover 20 and a fastener 30; the cover body 10 has a first end 11 and a second end 12 along its length direction, the first end 11 is used for mounting on the diesel engine flywheel, and the second end 12 is provided with a locking portion 121; the extension cover 20 is arranged on the second end 12 and is connected with the second end 12 in a telescopic adjustment mode, the extension cover 20 is provided with a waist-shaped adjustment hole 21 along its length direction; the fastener 30 is arranged between the locking portion 121 and the waist-shaped adjustment hole 21 to lock the extension cover 20 on the second end 12. The structure can adjust the length of the universal joint protector cover according to actual requirements, so as to better adapt to the installation requirements of the unit. By flexibly adjusting the length, the safety hidden danger caused by the exposure of the rotating part due to the too short protective cover is effectively avoided, and the cumbersome process of cutting the protective cover on site due to the too long protective cover is also avoided, thereby reducing the installation time and operation complexity. In addition, the design of adjustable length can flexibly cope with the size error of the same type unit generated in the assembly process, thereby improving the adaptability and installation tolerance range of the protective cover. Furthermore, the design of adjustable length also has good universality and can be applied to different types of units, thereby reducing the situation of customizing the protective cover due to the difference between the units.

[0047] In some optional embodiments, the locking portion 121 is provided with a press-in nut; the fastener 30 includes a bolt, a flat washer and a spring washer, the bolt is connected with the press-in nut in sequence through the spring washer, the flat washer and the waist-shaped adjustment hole 21, so that the extension cover 20 is locked on the second end 12.

[0048] In some optional embodiments, the outer periphery of the second end 12 is provided with a plurality of locking portions 121, the outer periphery of the extension cover 20 is provided with a plurality of waist-shaped adjustment holes 21 corresponding to the plurality of locking portions 121, and the number of the fasteners 30 matches the number of the locking portions 121 and the waist-shaped adjustment holes 21.

[0049] In some optional embodiments, the extension cover 20 has a head end and a tail end along its length direction, the head end is provided with a bearing body mounting hole 23, and a rubber sealing strip 24 is arranged in the bearing body mounting hole 23. In a specific embodiment, the extension cover 20 includes two symmetrical halves 22, specifically a first half and a second half, one end of the first half and the second half is combined to form the bearing body mounting hole 23, and the other end is combined to form the tail end matched with the second end 12 of the cover body 10.

[0050] Specifically, the rubber sealing strip 24 adopts a U-shaped design. In the installation, first, the U-shaped rubber sealing strip 24 is clamped into the bearing body mounting hole 23 of the extension cover 20, and then the bearing body of the pump body is mounted into the bearing body mounting hole 23. This way not only effectively ensures good sealing performance, but also effectively buffers the vibration transmitted from the diesel engine end to the pump body, thereby playing a damping role.

[0051] In some alternative embodiments, the shroud body 10 comprises a first portion 13, a second portion 14, a third portion 15 and a fourth portion 16; the second portion 14 is arranged opposite to the first portion 13; the third portion 15 is connected between the first portion 13 and the second portion 14 by a connecting assembly 17; the fourth portion 16 is connected between the first portion 13 and the second portion 14 by the connecting assembly 17, and is arranged opposite to the third portion 15.

[0052] In some alternative embodiments, the first portion 13, the second portion 14, the third portion 15 and the fourth portion 16 each comprises a side plate and a sector plate arranged near the first end 11; the four side plates surround to form a cuboid protection cavity, and the four sector plates surround to form a circular fixing disc, and the first end 11 is installed on the diesel engine flywheel through the circular fixing disc.

[0053] In some alternative embodiments, the first portion 13 and the second portion 14 each further comprises a folded edge located on opposite sides of the corresponding side plate; the connecting assembly 17 comprises a press-in nut, a connecting hole and a locking column; the press-in nut is arranged on the folded edge; the connecting hole is arranged on the side plate of the third portion 15 and the fourth portion 16; and the locking column is connected between the press-in nut and the connecting hole.

[0054] The specific installation process of the universal joint protector is as follows: first, the press-in nuts are installed on the folded edges of the first portion 13 and the second portion 14, and on the side plates near the second end 12. Then, the sector plates of the first portion 13 and the second portion 14 are oppositely installed on the diesel engine flywheel shell. Subsequently, the press-in nuts are also installed on the side plates of the third portion 15 and the fourth portion 16 near the second end 12, and the sector plates of the third portion 15 and the fourth portion 16 are oppositely installed on the diesel engine flywheel shell. Further, the third portion 15 and the fourth portion 16 are fixed on the press-in nuts on the folded edges of the first portion 13 and the second portion 14 respectively through the locking columns, so as to complete the assembly of the shroud body 10 and form a cuboid structure with an unsealed tail. Next, the U-shaped rubber sealing strip is fixed at the bearing body mounting hole 23 of the telescopic shroud 20, and then the telescopic shroud 20 is connected to the second end 12 of the shroud body 10 using the fastener 30, finally completing the installation of the universal joint protector.

[0055] In some alternative embodiments, the first portion 13, the second portion 14, the third portion 15 and the fourth portion 16 are all installed obliquely, and the first portion 13 and the third portion 15 are located above the fourth portion 16 and the second portion 14 respectively. Compared with horizontal installation, when a heavy object falls on a horizontal surface, the object will stay on the horizontal surface; while when a heavy object falls on an inclined surface, the object will slide down, avoiding staying on the inclined surface, so as to make the unit stable and safe in operation.

[0056] Since the universal joint is a high-speed rotating component, its rotating speed is usually between 1480 rpm and 2980 rpm. During operation, due to the instability of the rotating speed of the diesel engine, the spline and the box of the universal joint will rub when transmitting torque, thereby generating a large amount of heat. These heat needs to be dissipated in time, therefore, the universal joint protective cover should have effective heat dissipation function. In some optional embodiments, the first part 13 and the third part 15 are both dustproof surfaces, and the second part 14 and the fourth part 16 are both heat dissipation surfaces provided with heat dissipation holes 18. This design not only effectively guarantees the heat dissipation function, but also ensures the dustproof effect.

[0057] At present, the common rotating component protection device on the market mostly adopts carbon steel material, and is painted according to different standard requirements. However, the carbon steel material joint protective cover is easy to produce sparks when abnormally contacting with the rotating component. This problem is particularly prominent in the petrochemical industry, because the production site of these industries is full of flammable and explosive materials, and the control requirements for fire sources are very strict. In order to avoid potential safety risks, the on-site equipment must have the characteristic of no spark. If the universal joint rubs with the protective cover made of carbon steel material and produces sparks during high-speed operation of the unit, it may cause serious safety accidents. Therefore, the joint protective cover made of carbon steel material is not suitable in such environment.

[0058] Therefore, in some optional embodiments, the material of the protective cover body 10 and the telescopic protective cover 20 is aluminum alloy material, so as to avoid the universal joint protective cover and the universal joint from producing sparks during operation. Compared with the traditional carbon steel material, the protective cover body 10 and the telescopic protective cover 20 made of aluminum alloy material are not easy to produce sparks when abnormally contacting with the high-speed rotating equipment, and have higher safety. In this embodiment, the material of the protective cover body 10 and the telescopic protective cover 20 is aluminum alloy material, so as to improve the safety and reliability. In addition, the aluminum alloy material has excellent corrosion resistance. In the smoke experiment, a protective oxide film is usually formed on the surface of the aluminum alloy material, which effectively prevents the substrate from being further eroded. Compared with carbon steel material, aluminum alloy material is more light and convenient for workers to install. According to API610 (centrifugal pumps for the petroleum, petrochemical and natural gas industries) standard, aluminum alloy material is also recognized as the material of the rotating component protective cover. Therefore, compared with the traditional carbon steel material, the aluminum alloy material not only has advantages in safety and corrosion resistance, but also its lightness makes it a more ideal choice.

[0059] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A protective cover for a universal coupling, characterized in that, include: The main body of the protective cover has a first end and a second end along its length. The first end is used to be installed on the flywheel of the diesel engine, and the second end is provided with a locking part. A telescopic cover is disposed at the second end and is telescopically and adjustablely connected to the second end. The telescopic cover has a waist-shaped adjustment hole along its length. Fasteners are inserted between the locking part and the waist-shaped adjustment hole to lock the telescopic cover to the second end.

2. The universal joint protective cover according to claim 1, characterized in that, The locking part is provided with a press-fit nut; The fastener includes a bolt, a flat washer, and a spring washer, and the bolt passes through the spring washer, the flat washer, and the waist-shaped adjustment hole in sequence to connect to the press-fit nut.

3. The universal joint protective cover according to claim 1, characterized in that, The outer periphery of the second end is provided with a plurality of locking parts, and the outer periphery of the telescopic cover is provided with a plurality of waist-shaped adjustment holes corresponding one-to-one with the plurality of locking parts. The fastener matches the number of the locking parts and the number of the waist-shaped adjustment holes.

4. The universal joint protective cover according to claim 1, characterized in that, The telescopic cover has a head end and a tail end along its length. The head end is provided with a bearing body mounting hole, and a rubber sealing strip is installed in the bearing body mounting hole.

5. The universal joint protective cover according to claim 1, characterized in that, The main body of the protective cover includes: Part One; The second part is set relative to the first part; The third part is connected between the first part and the second part via a connecting component; The fourth part is connected between the first part and the second part by a connecting component and is positioned opposite to the third part.

6. The universal joint protective cover according to claim 5, characterized in that, The first part, the second part, the third part and the fourth part each include a side plate and a fan-shaped plate disposed near the first end. The four side plates surround to form a rectangular protective cavity, and the four fan-shaped plates surround to form a circular fixing plate. The first end is mounted on the diesel engine flywheel through the circular fixing plate.

7. The universal joint protective cover according to claim 6, characterized in that, Both the first part and the second part further include folded edges located on opposite sides of the corresponding side panels, and the connecting assembly includes: A press-fit nut is provided on the folded edge; Connection holes are provided on the side plates of the third and fourth parts; A locking pin is connected between the press-fit nut and the connecting hole.

8. The universal joint protective cover according to claim 5, characterized in that, The first part, the second part, the third part, and the fourth part are all installed at an angle, and the first part and the third part are respectively located above the fourth part and the second part.

9. The universal joint protective cover according to claim 8, characterized in that, The first part and the third part are both dustproof surfaces, while the second part and the fourth part are both heat dissipation surfaces with heat dissipation holes.

10. The universal joint protective cover according to claim 1, characterized in that, Both the main body of the protective cover and the telescopic protective cover are made of aluminum alloy.

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