Diesel pump straight connecting shaft

Abstract

The utility model relates to the technical field of mechanical connection, and discloses a diesel pump straight connecting shaft which comprises a straight connecting shaft body, one end of the straight connecting shaft body is provided with a threaded rod connected with a water pump impeller, the other end of the straight connecting shaft body is rotationally connected with a connecting sleeve, and a diesel engine crankshaft is provided with an external thread. Internal threads used for being in threaded connection with a diesel engine crankshaft are formed in the side wall of the inner side of the connecting sleeve, the straight connecting shaft body is further provided with a limiting piece used for limiting relative rotation of the straight connecting shaft body and the diesel engine crankshaft, the installation technology between a diesel engine and a water pump can be reduced, and the installation efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of mechanical connection, and in particular to a diesel pump direct-connection shaft. Background Art

[0002] Diesel engines and water pumps, as common power equipment, are widely used in various industrial fields.

[0003] In general use, the diesel engine crankshaft and the water pump shaft are connected to each other, and the diesel engine can drive the water pump to work. In the existing connection method between the diesel pump and the diesel engine, the diesel engine and the water pump usually need to use complex couplings and transmission devices to achieve power transmission, and there are many accessories during installation, the installation process is cumbersome, and the efficiency is not high. Utility Model Content

[0004] In order to reduce the installation process between the diesel engine and the water pump and improve the installation efficiency, the present application provides a diesel pump direct-connection shaft.

[0005] The present application provides a diesel pump direct-connection shaft, which adopts the following technical solution:

[0006] A diesel pump direct-connection shaft comprises a direct-connection shaft body, one end of the direct-connection shaft body is provided with a threaded rod connected to a water pump impeller, the other end of the direct-connection shaft body is rotatably connected to a connecting sleeve, an external thread is provided on a diesel engine crankshaft, an internal thread for threaded connection to the diesel engine crankshaft is provided on an inner side wall of the connecting sleeve, and the direct-connection shaft body is also provided with a limiter for limiting the relative rotation between itself and the diesel engine crankshaft.

[0007] By adopting the above technical solution, the direct-connecting shaft body is connected to the water pump impeller through a threaded rod at one end thereof, and the other end is threadedly connected to the diesel engine crankshaft through a connecting sleeve, thereby realizing a direct connection between the diesel pump and the diesel engine. At the same time, the setting of the limiter limits the relative rotation between the direct-connecting shaft body and the diesel engine crankshaft, thereby realizing torque transmission, eliminating traditional couplings and transmission devices, simplifying the installation process, and improving connection stability.

[0008] Preferably, the limiting member is a limiting block, and a limiting groove for inserting the limiting block is provided on the end surface of the diesel engine crankshaft.

[0009] By adopting the above technical solution, the limit block is inserted into the limit groove, which limits the relative rotation of the direct-connection shaft body and the diesel engine crankshaft, thereby improving the stability of the connection.

[0010] Preferably, a positioning ring is provided on the inner side wall of the connecting sleeve, and a movable groove for the positioning ring to rotate is provided on the outer side wall of the direct-connection shaft body, and the movable groove extends along the axial direction of the direct-connection shaft body.

[0011] By adopting the above technical solution, the positioning ring rotates in the movable groove to achieve rotational connection of the positioning ring. At the same time, the movable groove extends along the axial direction of the direct-connection shaft body, so that the positioning ring can slide close to the diesel engine crankshaft, which is convenient for connecting the diesel engine crankshaft.

[0012] Preferably, a clamping block is provided on the inner side wall of the connecting sleeve, a driving rod is provided on the connecting sleeve for driving the clamping block to slide toward or away from the center line of the connecting sleeve, a sliding groove for the clamping block to slide is provided on the inner side wall of the connecting sleeve, and a clamping groove for the clamping block to be engaged is provided on the outer side wall of the diesel engine crankshaft.

[0013] By adopting the above technical solution, the driving member drives the card block to slide in the slide groove, so that the card block is clamped in the card groove. In combination with the threaded connection method, the relative rotation between the connecting sleeve and the diesel engine crankshaft can be limited, thereby improving the stability of the connection.

[0014] Preferably, the driving member comprises a screw rod rotatably disposed on the clamping block, one end of the screw rod facing away from the clamping block passes through the connecting sleeve, and the screw rod is threadedly connected to the connecting sleeve.

[0015] By adopting the above technical solution, the screw is rotated, the screw is threadedly connected in the connecting sleeve and drives the clamping block to slide in the sliding groove, thereby realizing the clamping or separation of the clamping block and the clamping groove, and the operation is convenient.

[0016] Preferably, the driving member further comprises a holding block arranged at an end of the threaded rod away from the clamping block.

[0017] By adopting the above technical solution, the holding block facilitates the rotation operation of the threaded rod.

[0018] Preferably, a chamfer is provided on a side wall of the clamping block facing the center line of the connecting sleeve.

[0019] By adopting the above technical solution, the chamfer facilitates the operation of inserting the card block into the card slot.

[0020] Preferably, the direct-connection shaft body comprises a first shaft body, a second shaft body, a third shaft body and a fixing member, and two fixing members are provided and are respectively used to connect the first shaft body and the second shaft body and to connect the second shaft body and the third shaft body.

[0021] By adopting the above technical solution, the first shaft body, the second shaft body and the third shaft body are connected together by the fixing member to form a direct-connection shaft body, so that the length of the direct-connection shaft body can be easily changed in actual use to adapt to different working conditions.

[0022] Preferably, the fixing member includes an insert block, a fixing bolt and a fixing nut, an insert block is provided on an end face of the first shaft body facing the second shaft body and an end face of the second shaft body facing the third shaft body, a slot for inserting the insert block is provided on an end face of the second shaft body facing the first shaft body and an end face of the third shaft body facing the second shaft body, and a through hole for the fixing bolt to pass through is provided on the second shaft body, the insert block and the third shaft body.

[0023] By adopting the above technical solution, the plug block is inserted into the slot, and then the plug block, the second shaft body and the third shaft body are fixed together by fixing bolts and fixing nuts, thereby realizing the connection between the first shaft body, the second shaft body and the third shaft body, and the connection is stable and reliable.

[0024] In summary, the present application includes at least one of the following beneficial effects:

[0025] 1. Through the setting of the direct-connection shaft body, threaded rod, connecting sleeve and limiter, the direct connection between the diesel pump and the diesel engine is realized, eliminating the traditional coupling and transmission device, simplifying the installation process and improving the connection efficiency;

[0026] 2. The arrangement of the clamping block and the clamping slot further limits the relative rotation between the connecting sleeve and the crankshaft of the diesel engine, thereby improving the stability of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic structural diagram of Example 1;

[0028] Figure 2 is a schematic cross-sectional structural diagram of the direct-connection shaft body in Example 1;

[0029] Figure 3 is a schematic structural diagram of Example 2;

[0030] Figure 4 It is a schematic diagram of the exploded structure of the direct-connection shaft body in Example 2.

[0031] Explanation of the reference numerals in the accompanying drawings: 101, diesel engine crankshaft; 102, slot; 1, direct-connected shaft body; 11, movable slot; 12, first shaft body; 13, second shaft body; 131, slot; 14, third shaft body; 2, threaded rod; 3, connecting sleeve; 4, limit member; 41, limit block; 5, block; 6, driving member; 61, screw rod; 62, holding block; 7, fixing member; 71, insert block; 72, fixing bolt; 73, fixing nut. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-4 This application is described in further detail.

[0033] Embodiment 1:

[0034] The present application embodiment discloses a diesel pump direct-connection shaft. Figure 1 The diesel pump direct-connecting shaft includes a direct-connecting shaft body 1; one end of the direct-connecting shaft body 1 is provided with a threaded rod 2 connected to the water pump impeller, and an adaptive nut is used to achieve direct connection and fixation with the water pump impeller. At the same time, a bump or other structure can be provided at one end of the direct-connecting shaft body 1 close to the threaded rod 2 to cooperate with the groove seat on the impeller, thereby achieving a stable connection with the water pump impeller.

[0035] Reference Figure 1 and Figure 2 The other end of the direct-connection shaft body 1, that is, the end away from the threaded rod 2, is rotatably connected with a connecting sleeve 3, which is a hollow circular sleeve, one end of which is rotatably connected to the direct-connection shaft body 1, and the other end is used to connect the diesel engine crankshaft 101. Specifically, an internal thread is provided on the inner side wall of the connecting sleeve 3, and an external thread is provided on the diesel engine crankshaft 101. The diesel engine crankshaft 101 can be inserted into the connecting sleeve 3, so that the connecting sleeve 3 is threadedly connected with the external thread on the diesel engine crankshaft 101 through the internal thread on the inner side thereof, thereby realizing the connection between the direct-connection shaft body 1 and the diesel engine crankshaft 101.

[0036] Reference Figure 1 and Figure 2 The direct-connected shaft body 1 is also provided with a limit member 4 for limiting the relative rotation between itself and the diesel engine crankshaft 101. The limit member 4 is a limit block 41. The rectangular shape of the limit block 41 is not limited as long as it can transmit torque between the direct-connected shaft body 1 and the diesel engine crankshaft 101. In this embodiment, the cross-section of the limit block 41 is rectangular, and a limit groove for the limit block 41 to be inserted is provided on the end surface of the diesel engine crankshaft 101. When the direct-connected shaft body 1 is connected to the diesel engine crankshaft 101, the limit block 41 is inserted in the limit groove, which limits the relative rotation of the direct-connected shaft body 1 and the diesel engine crankshaft 101, and at the same time can drive the direct-connected shaft body 1 to rotate through the crankshaft, thereby driving the impeller of the water pump to rotate.

[0037] Furthermore, a positioning ring is provided on the inner side wall of the connecting sleeve 3, and the positioning ring is fixed at one end close to the threaded rod 2. A movable groove 11 for the positioning ring to rotate is provided on the outer side wall of the direct-connecting shaft body 1, and the movable groove 11 extends along the axial direction of the direct-connecting shaft body 1, so that the positioning ring can rotate in the movable groove 11 and can slide along the movable groove 11. When in use, the connecting groove first slides toward the threaded rod 2, and the limit block 41 can be inserted into the limit groove first, and then the connecting sleeve 3 is slid close to the diesel engine crankshaft 101, and the connecting sleeve 3 is rotated for threaded connection.

[0038] Reference Figure 1 and Figure 2Optionally, a block 5 may be provided on the inner side wall of the connecting sleeve 3, and a driving member 6 for driving the block 5 to slide toward or away from the center line of the connecting sleeve 3 is provided on the connecting sleeve 3. A slide groove for the block 5 to slide is provided on the inner side wall of the connecting sleeve 3, and a slot 102 for the block 5 to engage is provided on the outer side wall of the diesel engine crankshaft 101. The driving member 6 drives the block 5 to slide along the slide groove and insert into the slot 102, or to separate the block 5 from the slot 102, thereby limiting the reverse rotation between the connecting sleeve 3 and the diesel engine crankshaft 101, and improving the stability of the connection.

[0039] Reference Figure 1 and Figure 2 Specifically, the driving member 6 includes a screw rod 61 rotatably arranged on the clamping block 5 through a bearing, and one end of the screw rod 61 away from the clamping block 5 is passed through the connecting sleeve 3, and the screw rod 61 is threadedly connected with the connecting sleeve 3. When it is necessary to limit the relative rotation between the connecting sleeve 3 and the diesel engine crankshaft 101, the screw rod 61 is rotated, and the screw rod 61 drives the clamping block 5 to slide in the direction close to the center line of the connecting sleeve 3, so that the clamping block 5 is clamped in the clamping groove 102. When it is necessary to release the restriction on the relative rotation between the connecting sleeve 3 and the diesel engine crankshaft 101, the screw rod 61 is rotated in the opposite direction to separate the clamping block 5 from the clamping groove 102.

[0040] In order to facilitate the rotation of the screw 61, the driving member 6 further comprises a holding block 62 fixedly arranged at one end of the screw 61 away from the clamping block 5, and the screw 61 can be conveniently rotated by the holding block 62. In order to facilitate the operation of clamping the clamping block 5 into the clamping groove 102, a chamfer is provided on the side wall of the clamping block 5 facing the center line of the connecting sleeve 3, and the chamfer can guide the clamping block 5 to be clamped into the clamping groove 102.

[0041] The implementation principle of a diesel pump direct-connection shaft in an embodiment of the present application is as follows: when connecting, first pass the threaded rod 2 on the direct-connection shaft body 1 through the water pump impeller, and fix it to the impeller with a nut, then insert the limit block 41 into the limit groove of the diesel engine crankshaft 101, then rotate the connecting sleeve 3 to threadably connect it to the diesel engine crankshaft 101, and finally rotate the screw 61 to drive the clamping block 5 to clamp into the clamping groove 102 to complete the installation.

[0042] Embodiment 2:

[0043] The difference between this embodiment and embodiment 1 is that the specific structure of the direct-connection shaft body 1 is different. Figure 3 and Figure 4The direct-connection shaft body 1 includes a first shaft body 12, a second shaft body 13, a third shaft body 14 and a fixing member 7, wherein the connecting sleeve 3 is rotatably arranged at one end of the first shaft body 12 away from the second shaft body 13, the screw 61 is fixedly connected to one end of the third shaft body 14 away from the second shaft body 13, and two fixing members 7 are correspondingly arranged, one for connecting the first shaft body 12 and the second shaft body 13, and the other for connecting the second shaft body 13 and the third shaft body 14. Since the connection method is the same, the connection structure of the first shaft body 12 and the second shaft body 13 is specifically described below.

[0044] Reference Figure 3 and Figure 4 Specifically, the fixing member 7 includes an insert block 71, a fixing bolt 72 and a fixing nut 73. A rectangular insert block 71 is fixed to one end face of the first shaft body 12 facing the second shaft body 13, and a slot 131 for inserting the insert block 71 is provided on one end face of the second shaft body 13 facing the first shaft body 12. The insert block 71 is inserted into the slot 131 to achieve pre-positioning of the first shaft body 12 and the second shaft body 13. Through holes for the fixing bolt 72 to pass through are provided on the insert block 71 of the first shaft body 12 and the side wall of the second shaft body 13. The fixing bolt 72 passes through the insert blocks 71 on the second shaft body 13 and the first shaft body 12 in turn, and is threadedly connected with the fixing nut 73, so that the insert block 71 and the second shaft body 13 are fixed together by the fixing bolt 72 and the fixing nut 73, thereby achieving the connection between the first shaft body 12 and the second shaft body 13.

[0045] Correspondingly, an insert block 71 is provided on one end face of the second shaft body 13 facing the third shaft body 14, and a slot 131 is provided on one end face of the third shaft body 14 facing the second shaft body 13, and is also locked by a fixing bolt 72 and a fixing nut 73. When the connection space is small, when connecting the water pump and the diesel engine, the second shaft body 13 can be removed first, and the first shaft body 12 and the third shaft body 14 can be directly connected. The length of the direct-connected shaft body 1 is adjusted, and then the first shaft body 12 is connected to the water pump impeller, and the third shaft body 14 is connected to the diesel engine crankshaft 101.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A diesel pump direct-connection shaft, characterized in that: The invention comprises a straight-connected shaft body (1), one end of which is provided with a threaded rod (2) connected to a water pump impeller, the other end of which is rotatably connected to a connecting sleeve (3), an external thread is provided on a diesel engine crankshaft (101), an internal thread for threaded connection to the diesel engine crankshaft (101) is provided on an inner side wall of the connecting sleeve (3), and the straight-connected shaft body (1) is also provided with a stopper (4) for limiting the relative rotation between the straight-connected shaft body and the diesel engine crankshaft (101).

2. A diesel pump direct-connection shaft according to claim 1, characterized in that: The limiting member (4) is a limiting block (41), and a limiting groove for the limiting block (41) to be inserted is provided on the end surface of the diesel engine crankshaft (101).

3. A diesel pump direct-connection shaft according to claim 2, characterized in that: A positioning ring is provided on the inner side wall of the connecting sleeve (3), and a movable groove (11) for the positioning ring to rotate is provided on the outer side wall of the direct-connecting shaft body (1), and the movable groove (11) extends along the axial direction of the direct-connecting shaft body (1).

4. A diesel pump direct-connection shaft according to claim 3, characterized in that: A clamping block (5) is arranged on the inner side wall of the connecting sleeve (3), a driving member (6) is arranged on the connecting sleeve (3) for driving the clamping block (5) to slide towards or away from the center line of the connecting sleeve (3), a sliding groove for the clamping block (5) to slide is provided on the inner side wall of the connecting sleeve (3), and a clamping groove (102) for the clamping block (5) to be clamped is provided on the outer side wall of the diesel engine crankshaft (101).

5. A diesel pump direct-connection shaft according to claim 4, characterized in that: The driving member (6) comprises a screw rod (61) rotatably arranged on the clamping block (5), one end of the screw rod (61) facing away from the clamping block (5) passes through the connecting sleeve (3), and the screw rod (61) is threadedly connected to the connecting sleeve (3).

6. A diesel pump direct-connection shaft according to claim 5, characterized in that: The driving member (6) further comprises a holding block (62) arranged at an end of the screw rod (61) away from the clamping block (5).

7. A diesel pump direct-connection shaft according to claim 4, characterized in that: A chamfer is provided on a side wall of the clamping block (5) facing the center line of the connecting sleeve (3).

8. A diesel pump direct-connection shaft according to any one of claims 1 to 7, characterized in that: The direct-connection shaft body (1) comprises a first shaft body (12), a second shaft body (13), a third shaft body (14) and a fixing member (7); two fixing members (7) are provided and are respectively used to connect the first shaft body (12) and the second shaft body (13) and to connect the second shaft body (13) and the third shaft body (14).

9. A diesel pump direct-connection shaft according to claim 8, characterized in that: The fixing member (7) comprises an insert block (71), a fixing bolt (72) and a fixing nut (73); an end surface of the first shaft body (12) facing the second shaft body (13) and an end surface of the second shaft body (13) facing the third shaft body (14) are both provided with an insert block (71); an end surface of the second shaft body (13) facing the first shaft body (12) and an end surface of the third shaft body (14) facing the second shaft body (13) are both provided with a slot (131) for the insert block (71) to be inserted into; and a through hole for the fixing bolt (72) to pass through is formed on the second shaft body (13), the insert block (71) and the third shaft body (14).

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