Split shaft holding device

Abstract

The utility model provides a split-flap shaft holding device, including a split-flap outer cone sleeve formed by connecting two outer cone sleeve split-flap bodies, a split-flap inner cone sleeve formed by connecting two inner cone sleeve split-flap bodies, and a split-flap hydraulic device formed by connecting two hydraulic device units. The split-flap outer cone sleeve is provided with an oil filling hole, the inner surface of the split-flap outer cone sleeve and the outer surface of the split-flap inner cone sleeve are both conical surfaces, the split-flap hydraulic device is in a circular ring shape, and the split-flap hydraulic device is connected to the split-flap inner cone sleeve and is used to push one end of the split-flap outer cone sleeve. In the utility model, the inner cone sleeve, the outer cone sleeve and the hydraulic device all adopt a split-flap structure. When installing, there is no need to insert from one end of the transmission shaft, thereby reducing scratches on the surface of the transmission shaft; and by adopting this split-flap structure, the disassembly of the inner cone sleeve, the outer cone sleeve and the hydraulic device is greatly facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of shaft clamping, in particular to a petal-type shaft clamping device. Background Art

[0002] A shaft holding device (shaft clamping device) needs to be installed on the ship's transmission shaft. The traditional shaft holding device mainly includes an integral outer tapered sleeve and an integral inner tapered sleeve, wherein the inner surface of the outer tapered sleeve and the outer surface of the inner tapered sleeve are both conical surfaces with the same taper; during installation, the inner tapered sleeve needs to be inserted from one end of the transmission shaft and slid along the transmission shaft to the installation position, and then the outer tapered sleeve needs to be inserted from one end of the transmission shaft and slid to the position of the inner tapered sleeve, and the outer tapered sleeve needs to be sleeved on the outside of the inner tapered sleeve, and then an axial thrust is applied to one end of the outer tapered sleeve to move the outer tapered sleeve relative to the inner tapered sleeve. During the movement of the outer tapered sleeve, under the action of the conical surface, the outer tapered sleeve applies a huge radial extrusion force to the inner tapered sleeve, so that the inner tapered sleeve deforms and contracts radially and holds the transmission shaft tightly.

[0003] However, the existing shaft holding device has the following problems: 1. Since the inner and outer cone sleeves need to be inserted from one end of the transmission shaft and slide along the transmission shaft to the installation position, the inner and outer cone sleeves are prone to contact with the outer surface of the transmission shaft during the sliding process and cause scratches on the outer surface of the transmission shaft. 2. After the inner and outer cone sleeves are installed, it is difficult to disassemble them. Summary of the invention

[0004] The utility model aims to solve the deficiencies in the prior art and provide a split-petal shaft-holding device.

[0005] The purpose of the utility model is achieved through the following technical solutions: a petal-type shaft holding device, comprising a petal-type outer cone sleeve formed by connecting two outer cone sleeve petal bodies, a petal-type inner cone sleeve formed by connecting two inner cone sleeve petal bodies, and a petal-type hydraulic device formed by connecting two hydraulic device units, the petal-type outer cone sleeve is provided with an oil filling hole, the inner surface of the petal-type outer cone sleeve and the outer surface of the petal-type inner cone sleeve are both conical surfaces, the petal-type hydraulic device is in a circular ring shape, the petal-type hydraulic device is connected to the petal-type inner cone sleeve and is used to push one end of the petal-type outer cone sleeve.

[0006] In the utility model, the petal-type outer cone sleeve, the petal-type inner cone sleeve and the hydraulic device all adopt the petal-type structure. When the petal-type inner cone sleeve is installed, the two inner cone sleeve petal bodies are sleeved on both sides of the installation position on the transmission shaft and the two inner cone sleeve petal bodies are combined and connected to form a complete petal-type inner cone sleeve; when the petal-type outer cone sleeve is installed, the two outer cone sleeve petal bodies are sleeved on the outside of the petal-type inner cone sleeve and the two outer cone sleeve petal bodies are combined and connected to form a complete petal-type outer cone sleeve; when the petal-type hydraulic device is installed, the two hydraulic device units are sleeved on the outside of the petal-type inner cone sleeve and the two hydraulic device units are combined and connected to form a complete petal-type hydraulic device. In the utility model, the inner cone sleeve, the outer cone sleeve and the hydraulic device all adopt the petal-type structure. When installing, there is no need to insert from one end of the transmission shaft, thereby reducing scratches on the surface of the transmission shaft; and by adopting this petal-type structure, the disassembly of the inner cone sleeve, the outer cone sleeve and the hydraulic device is greatly facilitated.

[0007] Preferably, the two outer cone sleeve petal bodies are connected by connecting bolts.

[0008] Preferably, a first connecting plate is provided between the two outer cone sleeve petal bodies, and the first connecting plate is connected to the two outer cone sleeve petal bodies at the same time through a first fixing bolt.

[0009] Preferably, a second connecting plate is provided between the two inner cone sleeve petal bodies, and the second connecting plate is connected to the two inner cone sleeve petal bodies at the same time through second fixing bolts.

[0010] Preferably, an internal thread is provided on the inner side of the split-type hydraulic device, and an external thread matching the internal thread is provided on the outer surface of the split-type inner cone sleeve.

[0011] Preferably, the external threads are arranged at both ends of the split-flap inner cone sleeve.

[0012] Preferably, the two hydraulic device units are connected via a third connecting plate, and the third connecting plate is simultaneously connected to the two hydraulic device units via a third fixing bolt.

[0013] Preferably, the hydraulic device unit comprises a cylinder body and a piston body. The cylinder body is in a "C" shape. A piston cavity is provided on the cylinder body. The piston body is placed in the piston cavity. A sealing ring is provided on the piston body. The piston body is in sealing contact with the inner wall of the piston cavity through the sealing ring. The piston body is opposite to one end of the split outer cone sleeve. An oil inlet is provided on the cylinder body.

[0014] The beneficial effects of the utility model are as follows: in the utility model, the inner cone sleeve, the outer cone sleeve and the hydraulic device all adopt a split-petal structure, and when installing, there is no need to insert them from one end of the transmission shaft, thereby reducing scratches on the surface of the transmission shaft; and by adopting this split-petal structure, the disassembly of the inner cone sleeve, the outer cone sleeve and the hydraulic device is greatly facilitated. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of one direction of the utility model.

[0016] Figure 2 It is a structural schematic diagram of another direction of the utility model.

[0017] Figure 3 It is a schematic diagram of the structure of the split-flap outer cone sleeve.

[0018] Figure 4 It is a schematic diagram of the structure of the split-flap inner cone sleeve.

[0019] Figure 5 This is a schematic diagram of the structure of a split-valve hydraulic device in one direction.

[0020] Figure 6 It is a schematic diagram of the structure of the split-valve hydraulic device in another direction.

[0021] In the figure: 1. Split outer cone sleeve, 1-1. Split body of outer cone sleeve, 1-2. Oil filling hole, 1-3. Connecting bolt, 1-4. First connecting plate, 1-5. First fixing bolt, 2. Split inner cone sleeve, 2-1. Split body of inner cone sleeve, 2-2. Second connecting plate, 2-3. Second fixing bolt, 2-4. External thread, 3. Split hydraulic device, 3-1. Hydraulic device unit, 3-1a. Cylinder body, 3-1b. Piston body, 3-1c. Oil inlet, 3-2. Third connecting plate, 3-3. Third fixing bolt, 3-4. Internal thread. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0023] like Figures 1 to 5 As shown, a split-flap shaft holding device comprises a split-flap outer cone sleeve 1 formed by connecting two outer cone sleeve split-flap bodies 1-1, a split-flap inner cone sleeve 2 formed by connecting two inner cone sleeve split-flap bodies 2-1, and a split-flap hydraulic device 3 formed by connecting two hydraulic device units 3-1. The split-flap outer cone sleeve 1 is provided with an oil injection hole 1-2, which is arranged along the radial direction of the split-flap outer cone sleeve 1, and the oil injection hole 1-2 passes through the inner and outer surfaces of the split-flap outer cone sleeve 1. The inner surface of the split-flap outer cone sleeve 1 and the outer surface of the split-flap inner cone sleeve 2 are both conical surfaces, and the split-flap hydraulic device 3 is in a circular ring shape. The split-flap hydraulic device 3 is connected to the split-flap inner cone sleeve 2 and is used to push one end of the split-flap outer cone sleeve 1.

[0024] In the utility model, the petal-type outer cone sleeve 1, the petal-type inner cone sleeve 2 and the hydraulic device all adopt a petal-type structure. When the petal-type inner cone sleeve 2 is installed, the two inner cone sleeve petal bodies 2-1 are sleeved on both sides of the installation position on the transmission shaft, and the two inner cone sleeve petal bodies 2-1 are combined and connected to form a complete petal-type inner cone sleeve 2; when the petal-type outer cone sleeve 1 is installed, the two outer cone sleeve petal bodies 1-1 are sleeved on the outside of the petal-type inner cone sleeve 2, and the two outer cone sleeve petal bodies 1-1 are combined and connected to form a complete petal-type outer cone sleeve 1; when the petal-type hydraulic device 3 is installed, the two hydraulic device units 3-1 are sleeved on the outside of the petal-type inner cone sleeve 2, and the two hydraulic device units 3-1 are combined and connected to form a complete petal-type hydraulic device 3. In the utility model, the inner cone sleeve, the outer cone sleeve and the hydraulic device all adopt a split-petal structure, and when installing, there is no need to insert them from one end of the transmission shaft, thereby reducing scratches on the surface of the transmission shaft; and by adopting this split-petal structure, the disassembly of the inner cone sleeve, the outer cone sleeve and the hydraulic device is greatly facilitated.

[0025] The two outer cone sleeve petal bodies 1-1 are connected by connecting bolts 1-3. The cross section of the outer cone sleeve petal body 1-1 is "C" shaped. Bolt holes for installing the connecting bolts 1-3 are respectively provided on both sides of the outer cone sleeve petal body 1-1.

[0026] A first connecting plate 1-4 is provided between the two outer cone sleeve petal bodies 1-1, and the first connecting plate 1-4 is connected to the two outer cone sleeve petal bodies 1-1 at the same time through the first fixing bolt 1-5. The first connecting plate 1-4 is in an arc shape, and the first connecting plate 1-4 is connected between the ends of the two outer cone sleeve petal bodies 1-1. A threaded hole for connecting the first fixing bolt 1-5 is provided on the end surface of the outer cone sleeve petal body 1-1, and bolt through holes are provided at both ends of the first connecting plate 1-4 for the first fixing bolt 1-5 to pass through. The first fixing bolt 1-5 passes through the bolt through hole on the first connecting plate 1-4 and is connected to the threaded hole on the end surface of the outer cone sleeve petal body 1-1.

[0027] A second connecting plate 2-2 is provided between the two inner cone sleeve petal bodies 2-1, and the second connecting plate 2-2 is connected to the two inner cone sleeve petal bodies 2-1 at the same time through the second fixing bolt 2-3. The second connecting plate 2-2 is in an arc shape, and the second connecting plate 2-2 is connected between the ends of the two inner cone sleeve petal bodies 2-1. A threaded hole for connecting the second fixing bolt 2-3 is provided on the end surface of the inner cone sleeve petal body 2-1, and bolt through holes are provided at both ends of the second connecting plate 2-2 for the second fixing bolt 2-3 to pass through. The second fixing bolt 2-3 passes through the bolt through hole on the second connecting plate 2-2 and is connected to the threaded hole on the end surface of the inner cone sleeve petal body 2-1.

[0028] The inner side of the split-type hydraulic device 3 is provided with an internal thread 3-4, and the outer surface of the split-type inner cone sleeve 2 is provided with an external thread 2-4 matching the internal thread 3-4. The external thread 2-4 is arranged at both ends of the split-type inner cone sleeve 2. When the split-type hydraulic device 3 is in the installed state, the split-type hydraulic device 3 is sleeved on the outer side of the split-type inner cone sleeve 2 and is located at one end of the split-type inner cone sleeve 2, and the split-type hydraulic device 3 is threadedly connected with the split-type inner cone sleeve 2. Preferably, the internal thread 3-4 and the external thread 2-4 are both rectangular threads.

[0029] The two hydraulic device units 3 - 1 are connected via a third connecting plate 3 - 2 , and the third connecting plate 3 - 2 is simultaneously connected to the two hydraulic device units 3 - 1 via a third fixing bolt 3 - 3 .

[0030] Specifically, the hydraulic device unit 3-1 includes a cylinder body 3-1a and a piston body 3-1b. The cylinder body 3-1a is in a "C" shape. A piston cavity is provided on the cylinder body 3-1a. The piston body 3-1b is placed in the piston cavity. A sealing ring is provided on the piston body 3-1b. The piston body 3-1b is in sealing contact with the inner wall of the piston cavity through the sealing ring. The piston body 3-1b is directly opposite to one end of the split-type outer cone sleeve 1. An oil inlet 3-1c is provided on the cylinder body 3-1a. The oil inlet 3-1c is connected to the hydraulic oil station through a liquid inlet pipeline. Hydraulic oil of a certain pressure is introduced into the piston cavity through the hydraulic oil station, so that the piston is pushed to move by the hydraulic oil, thereby pushing one end of the split-type outer cone sleeve 1.

[0031] When installing the split-type shaft holding device, the specific method is as follows:

[0032] Step 1: Clean the outer surface of the drive shaft to make it meet the installation conditions, put the two inner cone sleeve petals 2-1 on the outside of the petal-type inner cone sleeve 2, and combine and connect the two outer cone sleeve petals 1-1 into an integral petal-type inner cone sleeve 2 through the second connecting plate 2-2 and the second fixing bolts 2-3.

[0033] Step 2: Put the two outer cone sleeve petal bodies 1-1 on the outside of the petal-type inner cone sleeve 2, and combine and connect the two outer cone sleeve petal bodies 1-1 into an integral petal-type outer cone sleeve 1 through the first connecting plate 1-4 and the first fixing bolt 1-5; fasten the two outer cone sleeve petal bodies 1-1 through the connecting bolts 1-3.

[0034] Step three, tighten the hydraulic device unit 3-1 along the external thread 2-4 on the split-type inner cone sleeve 2 from the pressure direction, check the overlap between the end faces of the two hydraulic device units 3-1, and use the third connecting plate 3-2 and the third fixing bolts 3-3 to fix the two hydraulic device units 3-1 to form a complete split-type hydraulic device 3. The split-type hydraulic device 3 is connected to the external thread 2-4 at the end with a smaller diameter on the outer surface of the split-type inner cone sleeve 2.

[0035] Step 4: Install a dial indicator on the end faces of the split-flap inner cone sleeve 2 and the split-flap outer cone sleeve 1 and measure the movement of the split-flap inner cone sleeve 2 and the split-flap outer cone sleeve 1.

[0036] Step five, the oil filling hole 1-2 is connected to the hydraulic oil station through a hydraulic pipeline, and hydraulic oil of a certain pressure is injected into the space between the split inner cone sleeve 2 and the split outer cone sleeve 1 through the oil filling hole 1-2, so that the split outer cone sleeve produces a slight expansion and deformation; hydraulic oil is introduced into the piston chamber of the hydraulic device unit 3-1 through the oil inlet 3-1c, and the hydraulic oil drives the piston to move and applies a top thrust to one end of the split outer cone sleeve 1. Under the action of the conical surface, the split outer cone sleeve 1 applies a huge radial extrusion pressure to the split inner cone sleeve 2, so that the inner cone sleeve deforms radially and contracts and holds the drive shaft tightly.

[0037] Step 6: After the movement amount (push amount) of the split-type outer cone sleeve 1 reaches the specified range, record the relevant data, slowly release the pressure of the oil filling hole 1-2, and observe whether the dial indicator rebounds. After waiting for 15 minutes, slowly release the pressure of the oil inlet 3-1c on the hydraulic device unit 3-1. If the rebound reading of the dial indicator is within the specified range, the split-type shaft holding device is successfully installed;

[0038] Step seven, continue to tighten the split hydraulic device 3 so that the split hydraulic device 3 is pressed against one end of the split outer cone sleeve 1, use high-pressure air to blow out the hydraulic oil in the cylinder body 3-1a, and seal the liquid inlet hole on the cylinder body 3-1a with bolts, and the whole installation process is completed.

[0039] When disassembling the split-type shaft holding device, the specific method is as follows:

[0040] Step 1: first remove the split-type hydraulic device 3 on the pressing side, and then install the split-type hydraulic device 3 on the external thread 2-4 at the end with a larger diameter on the outer surface of the split-type inner cone sleeve 2.

[0041] Step 2: Inject hydraulic oil into the oil filling hole 1-2, and then inject hydraulic oil into the cylinder body 3-1a through the oil inlet 3-1c, and slowly increase the oil pressure entering the oil filling hole 1-2 and the oil inlet 3-1c until the split-type inner cone sleeve 2 and the split-type outer cone sleeve 1 are separated;

[0042] Step three, first remove the connecting bolts 1-3 and the first connecting plate 1-4 on the split outer cone sleeve 1 and remove the split outer cone sleeve 1, then remove the third connecting plate 3-2 on the split hydraulic device 3 and remove the split hydraulic device 3, and finally remove the second connecting plate 2-2 on the split inner cone sleeve 2 and remove the split inner cone sleeve 2 from the drive shaft.

[0043] The split-petal type shaft holding device of the utility model is suitable for a marine shaft-belt engine.

[0044] The present utility model is not limited to the above-mentioned optimal implementation mode. Anyone can derive other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in the shape or structure, all those having the same or similar technical solutions as the present application fall within the protection scope of the present utility model.

Claims

1. The split-flap shaft holding device is characterized by: The utility model comprises a split-flap outer cone sleeve formed by connecting two outer cone sleeve split-flap bodies, a split-flap inner cone sleeve formed by connecting two inner cone sleeve split-flap bodies, and a split-flap hydraulic device formed by connecting two hydraulic device units. The split-flap outer cone sleeve is provided with an oil filling hole. The inner surface of the split-flap outer cone sleeve and the outer surface of the split-flap inner cone sleeve are both conical surfaces. The split-flap hydraulic device is in a circular ring shape. The split-flap hydraulic device is connected to the split-flap inner cone sleeve and is used for pushing one end of the split-flap outer cone sleeve.

2. The split-flap shaft holding device according to claim 1 is characterized in that: The two outer cone sleeve petal bodies are connected via connecting bolts.

3. The split-flap shaft holding device according to claim 1 is characterized in that: A first connecting plate is arranged between the two outer cone sleeve petal bodies, and the first connecting plate is connected to the two outer cone sleeve petal bodies simultaneously through a first fixing bolt.

4. The split-flap shaft holding device according to claim 1 is characterized in that: A second connecting plate is arranged between the two inner cone sleeve petal bodies, and the second connecting plate is connected to the two inner cone sleeve petal bodies simultaneously through second fixing bolts.

5. The split-flap shaft holding device according to claim 1 is characterized in that: An internal thread is arranged on the inner side of the split-flap hydraulic device, and an external thread matching the internal thread is arranged on the outer surface of the split-flap inner cone sleeve.

6. The split-flap shaft-holding device according to claim 5 is characterized in that: The external threads are arranged at two ends of the split-flap inner cone sleeve.

7. The split-flap shaft-holding device according to claim 1 is characterized in that: The two hydraulic device units are connected via a third connecting plate, and the third connecting plate is simultaneously connected to the two hydraulic device units via a third fixing bolt.

8. The split-flap shaft-holding device according to claim 1 is characterized in that: The hydraulic device unit includes a cylinder body and a piston body. The cylinder body is in a "C" shape. A piston cavity is arranged on the cylinder body. The piston body is placed in the piston cavity. A sealing ring is arranged on the piston body. The piston body is in sealing contact with the inner wall of the piston cavity through the sealing ring. The piston body is directly opposite to one end of the split-flap outer cone sleeve. An oil inlet is arranged on the cylinder body.

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