Failure safety protection coupling for fire pump

Abstract

The utility model discloses a failure safety protection coupler for a fire pump, which particularly relates to the technical field of couplings and comprises a power input flange connected to an output shaft of an engine and a power output shaft hub used for outputting torque, and a combined elastic body is arranged between the power input flange and the power output shaft hub. The combined elastic body comprises a middle elastic body, a rear connecting piece and a front connecting piece, the front connecting piece and the rear connecting piece are fixedly arranged on the front side and the rear side of the middle elastic body respectively, the middle elastic body is made of rubber and has elasticity, and the rear connecting piece and the front connecting piece are both made of iron. The combined elastic body is arranged, the middle elastic body in the combined elastic body has elasticity, the buffering effect can be achieved in the torque transmission process, vibration impact of an engine is absorbed, the fire pump is prevented from being affected by vibration, and then fire fighting work is prevented from being affected.

Description

Technical Field

[0001] The utility model relates to the technical field of couplings, in particular to a fail-safe protection coupling for a fire pump. Background Art

[0002] Fire pumps are generally installed on fire trucks and are used to draw water sources for fire extinguishing. Therefore, during use, the fire pump needs to provide sufficient water pressure so that the water flow can be sprayed farther, thereby improving the fire extinguishing efficiency and ensuring the safety of personnel.

[0003] The fire pump needs to be driven by an electric motor or an engine. A coupling is required during the power output process. The vibration of the engine during operation will affect the fire pump through the coupling. The affected fire pump may not work properly, resulting in interference with fire fighting work. Therefore, a fail-safe protection coupling for a fire pump is proposed. Content of the Utility Model

[0004] The purpose of the utility model is to provide a fail-safe protection coupling for a fire pump. By setting a combined elastic body, it can play a buffering role during the torque transmission process, absorb the vibration impact of the engine, prevent the fire pump from being affected by vibration, and thus avoid affecting fire fighting work.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A fail-safe protection coupling for a fire pump includes a power input flange connected to the output shaft of the engine and a power output hub for outputting torque. A combined elastic body is provided between the power input flange and the power output hub;

[0006] The combined elastic body includes an intermediate elastic body, a rear connecting member, and a front connecting member. The front connecting member and the rear connecting member are respectively fixed on the front and rear sides of the intermediate elastic body;

[0007] The intermediate elastic body is made of rubber and has elasticity. The rear connecting member and the front connecting member are both made of iron.

[0008] Furthermore, a plurality of fastening screws are provided on the rear connecting member. The rear connecting member is connected to the power input flange through the fastening screws. A plurality of fastening bolts are provided on the front connecting member. The front connecting member is connected to the power output hub through the fastening bolts. In this way, the power input flange and the power output hub are connected through the combined elastic body.

[0009] Further, the fastening screw is located inside the power input flange, and the fastening bolt is located inside the combined elastic body. Both the fastening screw and the combined elastic body are hidden inside the coupling, without occupying too much space, reducing the installation space. At the same time, when installing the bolt into the threaded hole on the power input flange, the bolt passes through the threaded hole from right to left, and the bolt head is located on the right side of the power input flange, without occupying the left space, further reducing the installation space.

[0010] Further, an axially thrust safety protection element with elasticity is provided on the front side of the front connecting member. The axially thrust safety protection element is clamped between the front connecting member and the power input flange, and the axially thrust safety protection element provides axial support and buffering for the coupling.

[0011] Further, a radially supporting safety protection element with elasticity is sleeved on the outer end of the power output shaft hub. The radially supporting safety protection element is clamped between the power input flange and the power output shaft hub. The radially supporting safety protection element is located on the front side of the axially thrust safety protection element, and the radially supporting safety protection element provides radial support and buffering for the coupling.

[0012] In the above technical solution, the technical effects and advantages provided by the present utility model are as follows:

[0013] 1. By providing a combined elastic body, the intermediate elastic body in the combined elastic body has elasticity, can play a buffering role during the process of transmitting torque, absorb the vibration impact of the engine, avoid the influence of vibration on the fire pump, and further avoid affecting fire fighting work;

[0014] 2. By providing an axially thrust safety protection element and a radially supporting safety protection element, the soft performance of the two can well compensate for axial, radial and angular deviations, making the installation more convenient and reducing the requirement for alignment;

[0015] If the load borne by the coupling during operation exceeds the bearing range, the axially thrust safety protection element and the radially supporting safety protection element will be damaged accordingly, making the coupling unable to operate anymore, thus playing a protective role. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is the front view structure diagram of the present utility model;

[0018] Figure 2It is the rear view structure diagram of the present utility model;

[0019] Figure 3 It is the exploded view of the present utility model;

[0020] Figure 4 It is the side sectional view of the present utility model;

[0021] Figure 5 It is the Figure 4 enlarged view of part A in the present utility model.

[0022] Explanation of reference numerals:

[0023] 1. Power input flange; 2. Fastening screw; 3. Composite elastomer; 301. Intermediate elastomer; 302. Rear connecting member; 303. Front connecting member; 4. Axial thrust safety protection element; 5. Radial support safety protection element; 6. Fastening bolt; 7. Power output shaft hub. Specific embodiments

[0024] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0025] The present utility model provides a fail-safe protection coupling for a fire pump as Figures 1-5 shown, which includes a power input flange 1 connected to the engine output shaft and a power output shaft hub 7 for outputting torque. A composite elastomer 3 is provided between the power input flange 1 and the power output shaft hub 7;

[0026] The composite elastomer 3 includes an intermediate elastomer 301, a rear connecting member 302 and a front connecting member 303. The front connecting member 303 and the rear connecting member 302 are respectively fixed on the front and rear sides of the intermediate elastomer 301;

[0027] The intermediate elastomer 301 is made of rubber and has elasticity. Both the rear connecting member 302 and the front connecting member 303 are made of iron.

[0028] A plurality of fastening screws 2 are provided on the rear connecting member 302. The rear connecting member 302 is connected to the power input flange 1 through the fastening screws 2. A plurality of fastening bolts 6 are provided on the front connecting member 303. The front connecting member 303 is connected to the power output shaft hub 7 through the fastening bolts 6. Thus, the power input flange 1 and the power output shaft hub 7 are connected through the composite elastomer 3.

[0029] In use, the power input flange 1 is installed on the engine, and the power output shaft hub 7 is connected to the rotating component in the fire pump. Therefore, the engine can drive the coupling to rotate, and the coupling transmits torque to drive the fire pump to operate. The power input flange 1 and the power output shaft hub 7 are connected by the combined elastomer 3. The intermediate elastomer 301 in the combined elastomer 3 has elasticity and can play a buffering role in the process of transmitting torque, absorbing the vibration impact of the engine and preventing the fire pump from being affected by vibration, thereby avoiding affecting fire fighting work.

[0030] To reduce the installation space, as shown in Figure 1 , 2 , 4, and 5, the fastening screw 2 is located inside the power input flange 1, and the fastening bolt 6 is located inside the combined elastomer 3. The fastening screw 2 and the combined elastomer 3 are both hidden inside the coupling, without occupying too much space, reducing the installation space. At the same time, when installing the bolt through the threaded hole on the power input flange 1, the bolt passes through the threaded hole from right to left, and the bolt head is located on the right side of the power input flange 1, without occupying the left space, further reducing the radial installation space.

[0031] This coupling also has a protection function. As shown in Figures 3-5 , an axially thrust safety protection element 4 with elasticity is provided on the front side of the front connecting member 303. The axially thrust safety protection element 4 is clamped between the front connecting member 303 and the power input flange 1, and the axially thrust safety protection element 4 provides axial support and buffering for the coupling.

[0032] A radially supporting safety protection element 5 with elasticity is sleeved on the outer end of the power output shaft hub 7. The radially supporting safety protection element 5 is clamped between the power input flange 1 and the power output shaft hub 7. The radially supporting safety protection element 5 is located in front of the axially thrust safety protection element 4, and the radially supporting safety protection element 5 provides radial support and buffering for the coupling.

[0033] An axially thrust safety protection element 4 is provided between the combined elastomer 3 and the power input flange 1, and a radially supporting safety protection element 5 is provided between the power input flange 1 and the power output shaft hub 7. Both are soft and elastic, and can respectively well bear and transmit the axial force and radial force during the operation of the coupling. The soft performance can well compensate for axial, radial, and angular deviations, making the installation more convenient, reducing the requirement for alignment. At the same time, if the load borne by the coupling during operation exceeds the bearing range, the axially thrust safety protection element 4 and the radially supporting safety protection element 5 will be damaged accordingly. The damage of the two makes the coupling unable to operate anymore. Therefore, it plays a protective role for the coupling and the fire pump connected thereto, avoiding excessive load from damaging the fire pump.

[0034] Only some exemplary embodiments of the present utility model are described by way of illustration. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present utility model. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present utility model.

Claims

1. The fail-safe protection coupling for a fire pump, comprising a power input flange (1) connected to the engine output shaft and a power output shaft hub (7) for outputting torque, characterized in that: A combined elastomer (3) is provided between the power input flange (1) and the power output shaft hub (7); The combined elastomer (3) includes an intermediate elastomer (301), a rear connecting member (302) and a front connecting member (303). The front connecting member (303) and the rear connecting member (302) are respectively fixed on the front and rear sides of the intermediate elastomer (301); The intermediate elastomer (301) is made of rubber and has elasticity. Both the rear connecting member (302) and the front connecting member (303) are made of iron.

2. The fail-safe coupling for a fire pump according to claim 1, wherein: A plurality of fastening screws (2) are provided on the rear connecting member (302). The rear connecting member (302) is connected to the power input flange (1) through the fastening screws (2). A plurality of fastening bolts (6) are provided on the front connecting member (303). The front connecting member (303) is connected to the power output shaft hub (7) through the fastening bolts (6).

3. The fail-safe coupling for a fire pump according to claim 2, characterized in that: The fastening screws (2) are located inside the power input flange (1), and the fastening bolts (6) are located inside the combined elastomer (3).

4. The fail-safe protection coupling for a fire pump according to claim 1, characterized in that: An elastic axial thrust safety protection element (4) is provided on the front side of the front connecting member (303). The axial thrust safety protection element (4) is clamped between the front connecting member (303) and the power input flange (1).

5. The fail-safe coupling for a fire pump according to claim 1, wherein: An elastic radial support safety protection element (5) is sleeved on the outer end of the power output shaft hub (7). The radial support safety protection element (5) is clamped between the power input flange (1) and the power output shaft hub (7).

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