Coupling for pump

Abstract

The utility model discloses a coupling for a pump, which relates to the technical field of couplings for pumps and comprises a connecting shell, one end of the connecting shell is in bolted connection with a water pump impeller shaft fixing block, the other end of the connecting shell is in bolted connection with a motor power output shaft fixing block, and a reinforcing shell is connected between the water pump impeller shaft fixing block and the motor power output shaft fixing block. A connection relation is established between the water pump impeller shaft and the motor power output shaft through the connecting shell, the water pump impeller shaft fixing block, the motor power output shaft fixing block and the reinforcing shell, during maintenance, the coupler does not need to be separated into two parts firstly, then the coupler is detached from the water pump or the motor, and when the coupler is separated, the coupler can be detached from the water pump or the motor. The water pump or the motor is separated from the coupler, the coupler can be detached from the water pump or the motor without knocking, time is saved, and maintenance work efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pump couplings, in particular to a pump coupling. Background Art

[0002] Usually large water pumps are split type. The water pump is installed in the pipeline system. A platform is built next to the water pump and the motor is installed on the platform. The impeller of the water pump is driven by the motor. In order to transmit the motor power to the impeller shaft of the water pump, a coupling is required.

[0003] A general coupling is divided into two separable parts. When connecting the motor output shaft and the impeller shaft, one part is connected to the motor output shaft and the other part is connected to the impeller shaft. The two parts of the coupling are then aligned and brought into close engagement, and the two parts of the coupling are fixed together by a locking member to achieve stable transmission.

[0004] Commonly used couplings are sleeved on the shaft. During installation, the coupling usually needs to be knocked to plug it into the shaft. It also needs to be knocked during disassembly, which is not conducive to maintenance work.

[0005] Based on this, a pump coupling is now provided, which can eliminate the disadvantages of the existing device. Utility Model Content

[0006] The purpose of the utility model is to provide a coupling for a pump, so as to solve the problem of inconvenient installation and troublesome maintenance of the coupling in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] A pump coupling comprises a connecting shell, the connecting shell being provided with a mounting groove matching the impeller shaft and the motor output shaft, one end of the connecting shell being bolted to a water pump impeller shaft fixing block, the other end of the connecting shell being bolted to a motor power output shaft fixing block, a first positioning structure being provided between the connecting shell and the water pump impeller shaft fixing block, a second positioning structure being provided between the connecting shell and the motor power output shaft fixing block, a reinforcement shell being connected between the water pump impeller shaft fixing block and the motor power output shaft fixing block, a second keyway being provided on the water pump impeller shaft fixing block matching the flat key on the motor output shaft, and a first keyway being provided on the motor power output shaft fixing block matching the flat key on the water pump impeller shaft.

[0009] On the basis of the above technical solutions, the present invention also provides the following optional technical solutions:

[0010] In an optional solution: two first through-holes are symmetrically provided at both ends of the connecting shell, a first bolt is passed through the first through-hole, two second through-holes are symmetrically provided on the water pump impeller shaft fixing block and the motor power output shaft fixing block, the second through-holes correspond to the positions of the first through-holes, the first bolt passes through the second through-holes, and a first nut is threadedly connected to the first bolt.

[0011] In an optional solution: four pre-tightening holes are provided on the connecting shell, the four pre-tightening holes correspond to the four first through-holes one by one, each of the pre-tightening holes is connected to a first through-hole, and a set screw is connected to the inner thread of the pre-tightening hole.

[0012] In an optional solution: the first positioning structure includes a first positioning groove provided on the connecting shell, and the water pump impeller shaft fixing block is provided with a first positioning block matching the first positioning groove.

[0013] In an optional solution: the second positioning structure includes a second positioning groove provided on the connecting shell, and the motor power output shaft fixing block is provided with a second positioning block matching the second positioning groove.

[0014] In an optional solution: there are four first positioning blocks and they are distributed at the four corners of the water pump impeller shaft fixing block, and there are four second positioning blocks and they are distributed at the four corners of the motor power output shaft fixing block.

[0015] In an optional solution: four second bolts are symmetrically provided at both ends of the reinforcement shell, the second bolt at the left end of the reinforcement shell passes through the water pump impeller shaft fixing block and the connecting shell, and the second bolt at the right end of the reinforcement shell passes through the motor power output shaft fixing block and the connecting shell, and a second nut is threadedly connected to the second bolt.

[0016] In an optional solution: the joint between the second bolt and the second nut is coated with screw glue, and the joint between the first bolt and the first nut is coated with screw glue.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] The utility model establishes a connection relationship between the water pump impeller shaft and the motor power output shaft by means of a connecting shell, a water pump impeller shaft fixing block, a motor power output shaft fixing block and a reinforcement shell. During maintenance, there is no need to first separate the coupling into two parts and then remove the coupling from the water pump or from the motor. When the coupling is separated, the water pump or the motor is separated from the coupling, and there is no need to knock to remove the coupling from the water pump or the motor, which saves time and is conducive to improving the efficiency of maintenance work. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1This is a schematic structural diagram of the utility model.

[0020] Figure 2 For this utility model Figure 1 A partial enlarged view of middle A.

[0021] Figure 3 This is a schematic diagram of the first keyway of the present utility model.

[0022] Figure 4 This is a schematic diagram of the first positioning structure of the utility model.

[0023] Figure 5 This is a schematic diagram of the second keyway of the present invention.

[0024] Notes on figure marks: 101, connecting shell; 102, water pump impeller shaft fixing block; 103, motor power output shaft fixing block; 104, reinforcement shell; 201, first through-hole; 202, second through-hole; 203, first bolt; 204, first nut; 205, pre-tightening hole; 206, set screw; 301, first positioning groove; 302, first positioning block; 303, second positioning groove; 304, second positioning block; 401, second bolt; 402, second nut; 501, first keyway; 502, second keyway. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0026] In one embodiment, Figure 1-Figure 5 As shown, a pump coupling includes a connecting shell 101, which is provided with a mounting groove matching the impeller shaft and the motor output shaft, one end of the connecting shell 101 is bolted to a water pump impeller shaft fixing block 102, and the other end of the connecting shell 101 is bolted to a motor power output shaft fixing block 103, a first positioning structure is provided between the connecting shell 101 and the water pump impeller shaft fixing block 102, a second positioning structure is provided between the connecting shell 101 and the motor power output shaft fixing block 103, a reinforcement shell 104 is connected between the water pump impeller shaft fixing block 102 and the motor power output shaft fixing block 103, a second keyway 502 matching the flat key on the water pump impeller shaft is provided on the water pump impeller shaft fixing block 102, and a first keyway 501 matching the flat key on the motor output shaft is provided on the motor power output shaft fixing block 103.

[0027] In this embodiment, the water pump impeller shaft fixing block 102 cooperates with the connecting shell 101, and the connecting shell 101 and the water pump impeller shaft fixing block 102 are fixed to the impeller shaft. The motor power output shaft fixing block 103 cooperates with the connecting shell 101 to connect the motor output shaft to the connecting shell 101. The reinforcement shell 104 connects the water pump impeller shaft fixing block 102 and the motor power output shaft fixing block 103 together to increase the structural strength. During installation, the connecting shell 101 and the water pump impeller shaft fixing block 102 are directly fixed to the impeller shaft, and then the motor position is adjusted so that the motor output shaft faces the mounting groove on the connecting shell 101, and the motor is moved so that The motor output shaft enters the mounting groove on the connecting shell 101. At this time, the connecting shell 101 corrects the motor output shaft, making the motor output shaft coaxial with the impeller shaft. The motor output shaft is then fixed by the motor power output shaft fixing block 103, so that the motor output shaft is connected to the connecting shell 101. Finally, the overall structure is strengthened by the reinforcement shell 104. When maintaining the motor, loosen the bolts and remove the motor power output shaft fixing block 103 and the reinforcement shell 104, and the motor output shaft can be directly separated from the coupling without laborious knocking. The same is true when maintaining the water pump. Just remove the water pump impeller shaft fixing block 102 and the reinforcement shell 104, which is beneficial to improving maintenance efficiency.

[0028] In one embodiment, Figure 1 and Figure 4 As shown, two first through-holes 201 are symmetrically provided at both ends of the connecting shell 101, and a first bolt 203 is passed through the first through-hole 201. Two second through-holes 202 are symmetrically provided on the water pump impeller shaft fixing block 102 and the motor power output shaft fixing block 103. The second through-holes 202 correspond to the positions of the first through-holes 201. The first bolt 203 passes through the second through-hole 202. A first nut 204 is threadedly connected to the first bolt 203. The first bolt 203 cooperates with the first nut 204 to fix the water pump impeller shaft fixing block 102 on the connecting shell 101 and fix the motor power output shaft fixing block 103 on the connecting shell 101.

[0029] In one embodiment, Figure 1-Figure 3As shown, four pre-tightening holes 205 are provided on the connecting shell 101, and the four pre-tightening holes 205 correspond to the four first through-holes 201 one by one. Each pre-tightening hole 205 is connected to a first through-hole 201, and the pre-tightening hole 205 is internally threaded with a set screw 206. When installing the coupling, under certain circumstances, the operator needs to hold the connecting shell 101 with one hand and place the water pump impeller shaft fixing block 102 or the motor power output shaft fixing block 103 on the connecting shell 101 with the other hand. Then, the first bolt 203 needs to be inserted from the bottom and the first nut 204 needs to be screwed on the first bolt 203 from the top. The operation by one person is difficult. In order to avoid this situation, the first bolt 203 can be inserted in advance, and the set screw 206 in the pre-tightening hole 205 can be rotated so that the set screw 206 lightly touches the first bolt 203 to prevent the first bolt 203 from falling off naturally, thereby improving practicality.

[0030] In one embodiment, Figure 4 As shown, the first positioning structure includes a first positioning groove 301 provided on the connecting shell 101, and the water pump impeller shaft fixing block 102 is provided with a first positioning block 302 matching the first positioning groove 301. The second positioning structure includes a second positioning groove 303 provided on the connecting shell 101, and the motor power output shaft fixing block 103 is provided with a second positioning block 304 matching the second positioning groove 303. When the water pump impeller shaft fixing block 102 is fixed to the connecting shell 101, the water pump impeller shaft fixing block 102 is directly placed on the connecting shell 101. At this time, the first positioning block 302 is inserted into the first positioning groove 301, which has the effect of quickly positioning and preventing deviation of the water pump impeller shaft fixing block 102. When the motor power output shaft fixing block 102 is fixed to the connecting shell 101, the water pump impeller shaft fixing block 102 is directly placed on the connecting shell 101. At this time, the first positioning block 302 is inserted into the first positioning groove 301, which has the effect of quickly positioning and preventing deviation of the water pump impeller shaft fixing block 102. When 103 is fixed on the connecting shell 101, the motor power output shaft fixing block 103 is directly placed on the connecting shell 101. At this time, the second positioning block 304 is inserted into the second positioning groove 303, which has the effect of quickly positioning and preventing the motor power output shaft fixing block 103 from deviation, which is beneficial to improving the efficiency of installation and maintenance work. In addition, when producing and processing the coupling, the contact part between the water pump impeller shaft fixing block 102 and the connecting shell 101 is only the first positioning block 302 and the first positioning groove 301, and the contact part between the motor power output shaft fixing block 103 and the connecting shell 101 is only the second positioning groove 303 and the second positioning block 304. The remaining planes are not in contact, and the non-contact parts do not require high-precision processing, which is beneficial to reducing production costs.

[0031] In one embodiment, Figure 3 and Figure 4As shown, there are four first positioning blocks 302 and they are distributed at the four corners of the water pump impeller shaft fixing block 102, and there are four second positioning blocks 304 and they are distributed at the four corners of the motor power output shaft fixing block 103. The water pump impeller shaft fixing block 102 is more stable when connected to the connecting shell 101, and the motor power output shaft fixing block 103 is more stable when connected to the connecting shell 101. When the bolts are tightened, the first positioning block 302 serves as a support point, which is conducive to the tight connection between the water pump impeller shaft fixing block 102 and the impeller shaft, and is conducive to the tight connection between the motor power output shaft fixing block 103 and the motor output shaft.

[0032] In one embodiment, Figure 1 As shown, four second bolts 401 are symmetrically penetrated at both ends of the reinforcement shell 104. The second bolt 401 at the left end of the reinforcement shell 104 penetrates the water pump impeller shaft fixing block 102 and the connecting shell 101, and the second bolt 401 at the right end of the reinforcement shell 104 penetrates the motor power output shaft fixing block 103 and the connecting shell 101. A second nut 402 is threadedly connected to the second bolt 401, and the second bolt 401 and the second nut 402 cooperate with each other. When the reinforcement shell 104 connects the water pump impeller shaft fixing block 102 and the motor power output shaft fixing block 103 together, the reinforcement shell 104 is also connected to the connecting shell 101, effectively improving the structural strength of the coupling.

[0033] In one embodiment, Figure 1 As shown, the joint between the second bolt 401 and the second nut 402 is coated with screw glue, and the joint between the first bolt 203 and the first nut 204 is coated with screw glue to prevent the bolts from loosening during the operation of the coupling.

[0034] The above embodiment discloses a coupling for a pump, wherein the first bolt 203 cooperates with the first nut 204 to fix the water pump impeller shaft fixing block 102 on the connecting shell 101, and the motor power output shaft fixing block 103 is fixed on the connecting shell 101, the second bolt 401 cooperates with the second nut 402, and while the reinforcement shell 104 connects the water pump impeller shaft fixing block 102 and the motor power output shaft fixing block 103 together, the reinforcement shell 104 is also connected to the connecting shell 101. During installation, the water pump impeller shaft fixing block 102 is placed on the impeller shaft so that The second keyway 502 corresponds to the flat key position on the impeller shaft, and then the connecting shell 101 is attached to the impeller shaft, so that the first positioning block 302 is inserted into the first positioning slot 301, the first bolt 203 is inserted, and the first nut 204 is tightened to fix the water pump impeller shaft fixing block 102 and the connecting shell 101 on the impeller shaft. Then adjust the position of the motor so that the motor output shaft faces the mounting slot on the connecting shell 101, move the motor so that the motor output shaft enters the mounting slot on the connecting shell 101, and the connecting shell 101 corrects the motor output shaft so that the motor output shaft is aligned with the impeller shaft. Coaxially, place the motor power output shaft fixing block 103 on the connecting shell 101, make the first keyway 501 on the motor power output shaft fixing block 103 correspond to the flat key on the motor power output shaft, insert the second positioning block 304 into the second positioning groove 303, insert the first bolt 203, tighten the first nut 204, fix the motor power output shaft fixing block 103 on the connecting shell 101, connect the motor output shaft to the connecting shell 101, and place the two ends of the reinforcement shell 104 on the water pump impeller shaft fixing block 102 and the motor power output shaft fixing block 103 respectively. Insert the second bolt 401 and tighten the second nut 402. The reinforcement shell 104 connects the water pump impeller shaft fixing block 102 and the motor power output shaft fixing block 103 together. At the same time, the reinforcement shell 104 is also connected to the connecting shell 101, effectively improving the structural strength of the coupling. When maintaining the motor, loosen the bolts and remove the motor power output shaft fixing block 103 and the reinforcement shell 104, and the motor output shaft can be directly separated from the coupling without laborious knocking. The same is true when maintaining the water pump. Just remove the water pump impeller shaft fixing block 102 and the reinforcement shell 104, which is beneficial to improving maintenance efficiency.

[0035] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A coupling for a pump, comprising a connecting shell (101), wherein the connecting shell (101) is provided with a mounting groove matching the impeller shaft and the motor output shaft, characterized in that: One end of the connecting shell (101) is bolted to a water pump impeller shaft fixing block (102), and the other end of the connecting shell (101) is bolted to a motor power output shaft fixing block (103). A first positioning structure is provided between the connecting shell (101) and the water pump impeller shaft fixing block (102), and a second positioning structure is provided between the connecting shell (101) and the motor power output shaft fixing block (103). A reinforcement shell (104) is connected between the water pump impeller shaft fixing block (102) and the motor power output shaft fixing block (103). A second keyway (502) matching a flat key on the motor output shaft is provided on the water pump impeller shaft fixing block (102), and a first keyway (501) matching a flat key on the water pump impeller shaft is provided on the motor power output shaft fixing block (103).

2. A pump coupling according to claim 1, characterized in that: Two first through-holes (201) are symmetrically provided at both ends of the connecting shell (101), a first bolt (203) is passed through the first through-hole (201), two second through-holes (202) are symmetrically provided on the water pump impeller shaft fixing block (102) and the motor power output shaft fixing block (103), the second through-holes (202) are located at positions corresponding to the first through-holes (201), the first bolt (203) passes through the second through-holes (202), and a first nut (204) is threadedly connected to the first bolt (203).

3. A pump coupling according to claim 2, characterized in that: The connecting shell (101) is provided with four pre-tightening holes (205), the four pre-tightening holes (205) correspond to the four first through-holes (201) one by one, each of the pre-tightening holes (205) is connected to a first through-hole (201), and the pre-tightening holes (205) are internally threadedly connected to a set screw (206).

4. A pump coupling according to claim 1, characterized in that: The first positioning structure comprises a first positioning groove (301) provided on the connecting shell (101), and the water pump impeller shaft fixing block (102) is provided with a first positioning block (302) matching the first positioning groove (301).

5. A pump coupling according to claim 4, characterized in that: The second positioning structure comprises a second positioning groove (303) provided on the connecting shell (101), and a second positioning block (304) matching the second positioning groove (303) is provided on the motor power output shaft fixing block (103).

6. A pump coupling according to claim 5, characterized in that: There are four first positioning blocks (302) distributed at the four corners of the water pump impeller shaft fixing block (102), and there are four second positioning blocks (304) distributed at the four corners of the motor power output shaft fixing block (103).

7. A pump coupling according to claim 2, characterized in that: Four second bolts (401) are symmetrically provided at both ends of the reinforcement shell (104), the second bolt (401) at the left end of the reinforcement shell (104) penetrates the water pump impeller shaft fixing block (102) and the connecting shell (101), and the second bolt (401) at the right end of the reinforcement shell (104) penetrates the motor power output shaft fixing block (103) and the connecting shell (101), and the second bolt (401) is threadedly connected with a second nut (402).

8. A pump coupling according to claim 7, characterized in that: The joint portion between the second bolt (401) and the second nut (402) is coated with screw glue, and the joint portion between the first bolt (203) and the first nut (204) is coated with screw glue.

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