Dismounting tool for driving half shaft point-and-mortise nut

Abstract

The utility model discloses a dismounting tool for a driving half shaft point-and-mortise nut, and belongs to the technical field of mechanical equipment dismounting. A first screw hole is fixedly formed in the center of the rear end of the mounting shell, adjusting grooves are fixedly formed in the two sides of the first screw hole, a screw is in threaded connection with the first screw hole, a bearing is fixedly arranged at the front end of the screw, an inner base is fixedly connected to the other end of the bearing, a second screw hole is fixedly formed in the rear end of the inner base, and an adjusting assembly is arranged on the second screw hole. The adjusting assembly is matched with the adjusting groove, a fixing frame is fixedly connected to the front end of the inner seat, an open groove is fixedly formed in the fixing frame, and a jacking assembly is arranged in the open groove. According to the utility model, through the arrangement of the jacking assembly, before the locking nut is disassembled, the pressing point on the locking nut is jacked up along the key groove by utilizing the pressing head, so that the pressing point is prevented from being stacked on the thread on the driving half shaft to cause damage in the subsequent locking nut disassembling process, and the economic loss is reduced. The point-and-mortise nut dismantling device is mainly used for dismantling point-and-mortise nuts.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical equipment disassembly technology, and more specifically, it relates to a disassembly tool for a drive half-shaft mortise nut. Background Technology

[0002] Currently, for vehicles that use drive half-shafts as the power source and force transmission component between the drive wheel and the drive half-shaft, the connection between the drive wheel and the drive half-shaft is generally achieved through a spline fit. A nut (with a raised edge) is then screwed into the head of the drive half-shaft and locked to prevent the drive wheel from coming off. Figure 8 and Figure 9 As shown, the locking of the drive half-shaft head connecting nut is generally achieved by keyway and nut tack deformation. After the connecting nut is tightened, the nut is tacked at the keyway position using tack equipment or tools, so that the nut is deformed and stuck in the keyway, thus achieving permanent locking of the nut.

[0003] For nuts that are locked using a nut-and-mortise method, during the replacement and disassembly of parts, the connecting nut is deformed due to the mortise and the nut is located inside the drive wheel with limited operating space. Therefore, the nut is usually forcibly removed using a pneumatic wrench. Since both sides of the keyway are threaded, the threads will be damaged by the deformed nut during the forced removal process, which will affect the reuse of the drive half shaft. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a tooling for removing the locking nut of the drive half shaft. By setting up a pressing component, before removing the locking nut, the pressing head is used to lift the pressing point on the locking nut along the keyway, so as to ensure that the pressing point will not pile up on the threads of the drive half shaft and cause damage during the subsequent removal of the locking nut, thereby reducing economic losses.

[0005] The aforementioned tooling for removing a drive half-shaft mortise nut includes a mounting shell. A screw hole is fixedly opened at the center of the rear end of the mounting shell. Adjustment grooves are fixedly opened on both sides of the screw hole. A screw rod is threaded onto the screw hole. A bearing is fixedly opened at the front end of the screw rod. An inner seat is fixedly connected at the other end of the bearing. A screw hole is fixedly opened at the rear end of the inner seat. An adjustment component is provided on the screw hole. The adjustment component cooperates with the adjustment groove. A fixing frame is fixedly connected to the front end of the inner seat. A slot is fixedly opened on the fixing frame. A top-pressing component is provided in the slot.

[0006] Preferably, the inner ring of the bearing and the outer wall of the screw are in transition fit, the outer ring of the bearing and the inner seat are in interference fit, and the front end face of the screw does not contact the inner seat.

[0007] Preferably, the side wall of the mounting shell is fixedly provided with an opening, and the front end of the mounting shell is fixedly connected to a base, which is provided with a fixing hole.

[0008] Preferably, the top-pressing assembly includes a pressure head that mates with a slot. A pin hole is fixedly opened in the middle of the pressure head, and a cylindrical pin is rotatably connected to the pin hole. Both ends of the cylindrical pin are fixedly connected to a fixing frame. A slot is fixedly opened on the bottom wall of the rear part of the pressure head, and a second compression spring is fixedly connected inside the slot. The other end of the second compression spring is fixedly connected to the inner wall of the slot. The front end of the pressure head is wedge-shaped, and the pressure head material is high-strength alloy steel. The bottom wall of the front part of the pressure head mates with the fixing frame.

[0009] Preferably, the adjustment assembly includes a guide rod, a compression spring is fixedly provided on the outer wall of the guide rod, a washer is fixedly provided at the front end of the compression spring, the washer is in contact with the outer wall of the mounting housing, and a thread is fixedly provided at the front end of the guide rod, the thread engaging with a screw hole.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1. By setting up a top pressure component, before disassembling the locking nut, the pressure head is used to lift the pressure point on the locking nut along the keyway, ensuring that the pressure point will not accumulate on the threads of the drive half shaft during the subsequent disassembly of the locking nut, thus reducing economic losses;

[0012] 2. By setting the adjustment component, after the mounting shell and the drive wheel are properly fitted, the guide rod is rotated on the adjustment groove so that the pressure head is aligned with the keyway, thus speeding up the removal of the locking nut. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the outer structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the inner structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the mounting shell structure;

[0016] Figure 4 This is a schematic diagram of the internal structure of the present invention;

[0017] Figure 5 This is a structural schematic diagram of the top pressure assembly and the inner seat;

[0018] Figure 6 A schematic diagram of the structure of the adjustment component;

[0019] Figure 7 This is a schematic diagram of the exploded structure of the top-pressure component;

[0020] Figure 8 A schematic diagram of the mating structure of the drive wheel, drive half shaft, and fixing nut;

[0021] Figure 9 This is a schematic diagram of the structure for fixing the nut and driving half-shaft.

[0022] In the diagram, 1. Mounting housing; 101. Base; 102. Window; 103. Adjustment groove; 104. Screw hole one; 2. Screw; 3. Adjustment assembly; 301. Guide rod; 301A. Thread; 302. Compression spring one; 303. Washer; 4. Inner seat; 401. Screw hole two; 402. Fixing bracket; 402A. Groove; 5. Top pressure assembly; 501. Pressure head; 501A. Pin hole; 501B. Slot hole; 502. Cylindrical pin; 503. Compression spring two; 6. Bearing; 7. Locking nut; 701. Pressure point; 8. Drive half shaft; 801. Keyway; 9. Drive wheel side. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings:

[0024] The directional terms used in the detailed description paragraphs are only for the convenience of those skilled in the art to understand the technical solutions described in this application based on the visual orientation shown in the accompanying drawings. Unless otherwise expressly specified and limited, the terms "setting," "installation," "connection," etc., should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] like Figure 1 and Figure 2 As shown, a tooling for removing a drive half-shaft mortise nut includes a mounting shell 1. A screw hole 104 is fixedly opened at the center of the rear end of the mounting shell 1. Adjustment grooves 103 are fixedly provided on both sides of the screw hole 104. A screw rod 2 is threaded onto the screw hole 104. A bearing 6 is fixedly installed at the front end of the screw rod 2. An inner seat 4 is fixedly connected to the other end of the bearing 6. A screw hole 401 is fixedly opened at the rear end of the inner seat 4. An adjustment component 3 is provided on the screw hole 401. The adjustment component 3 cooperates with the adjustment grooves 103. By setting the adjustment component 3, when the mounting shell 1 is properly engaged with the drive wheel edge 9, the guide rod 3 is... 01 rotates on the adjusting groove 103 so that the pressure head 501 is aligned with the keyway 801, which speeds up the removal of the locking nut 7; the front end of the inner seat 4 is fixedly connected to the fixing bracket 402, and the fixing bracket 402 is fixedly provided with a slot 402A. The slot 402A is provided with a top pressing component 5. By setting the top pressing component 5, before removing the locking nut 7, the pressure head 501 is used to lift the pressure point 701 on the locking nut 7 along the keyway 801, so as to ensure that the pressure point 701 will not pile up on the threads on the drive half shaft 8 during the subsequent removal of the locking nut 7, thereby reducing economic losses.

[0026] like Figure 4As shown, the inner ring of bearing 6 and the outer wall of screw 2 have a transition fit, while the outer ring of bearing 6 and the inner seat 4 have an interference fit. The front end face of screw 2 does not contact the inner seat 4. This fit allows for easy removal of the inner seat 4 during assembly and maintenance. Furthermore, the rotation of screw 2 only rotates the inner ring of bearing 6, without applying torque to the inner seat 4, thus increasing the stability of the axial movement of the inner seat 4.

[0027] like Figure 3 As shown, a window 102 is fixedly opened on the side wall of the mounting shell 1, and a base 101 is fixedly connected to the front end of the mounting shell 1. The base 101 has a fixing hole. When using the tooling, the base 101 is fixed to the drive wheel side 9 and secured. The alignment of the pressure head 501 and the keyway 801 can be observed through the window 102.

[0028] like Figure 5 and Figure 7 As shown, the top pressing assembly 5 includes a pressing head 501, which cooperates with a slot 402A. A pin hole 501A is fixedly opened in the middle of the pressing head 501, and a cylindrical pin 502 is rotatably connected to the pin hole 501A. Both ends of the cylindrical pin 502 are fixedly connected to the fixing frame 402. A slot 501B is fixedly opened on the bottom wall of the rear part of the pressing head 501. A second compression spring 503 is fixedly connected inside the slot 501B. The other end of the second compression spring 503 is fixedly connected to the inner wall of the slot 402A. The front end of the pressing head 501 is wedge-shaped. The pressing head 501 is made of high-strength alloy steel, and the bottom wall of the front part of the pressing head 501 cooperates with the fixing frame 402. Since the keyway 801 at the head of the drive half-shaft 8 is a semi-circular or oblique keyway 801 with a deep outer cut and a shallow inner cut, as the pressure head 501 is gradually pressed into the keyway 801, the pressure head 501 not only bears the extrusion force of the pressure point 701, but also needs to reserve clearance space to allow the contact end of the pressure head 501 to tilt upwards. Therefore, under the push of the pressure spring 503, the pressure head 501 keeps its front end in contact with the fixing frame 402, and transmits the extrusion force of the pressure point 701 to the fixing frame 402. It can also rotate around the cylindrical pin 502, allowing the front end of the pressure head 501 to open to fit the keyway 801.

[0029] like Figure 6 As shown, the adjusting assembly 3 includes a guide rod 301. A compression spring 302 is fixedly mounted on the outer wall of the guide rod 301. A washer 303 is fixedly mounted on the front end of the compression spring 302. The washer 303 contacts and engages with the outer wall of the mounting housing 1. A thread 301A is fixedly mounted on the front end of the guide rod 301, and the thread 301A engages with a screw hole 401. After rotating and screwing the guide rod 301 into the inner seat 4, rotating the guide rod 301 adjusts its position on the adjusting groove 103, thereby aligning the pressure head 501 with the keyway 801.

[0030] Working principle:

[0031] 1. In order to keep the locking nut 7 locked to the drive half shaft 8, a mortise and tenon tool is used to perform mortise and tenon treatment, which causes the nut structure to deform. The pressed point 701 is stuck in the keyway 801 of the drive half shaft 8. When it is necessary to remove the locking nut 7, the base 101 of the tooling is fixed to the drive wheel side 9.

[0032] 2. Observe the position of the pressure head 501 through the window 102, and rotate the guide rod 301 so that the pressure head 501 is aligned with the keyway 801;

[0033] 3. First, manually rotate the screw 2 to advance the inner seat 4. When the pressure head 501 contacts the keyway 801, use an electric or pneumatic tool to rotate the screw 2, driving the pressure head 501 to move towards the keyway 801. The pressure head 501 uses a wedge structure to lift the pressure point 701 of the locking nut 7.

[0034] 4. Rotate screw 2 in the opposite direction to remove inner seat 4, and press head 501 returns to its original position under the push of spring 503.

[0035] This invention, by setting up a top-pressing component 5, uses a pressure head 501 to lift the pressure point 701 on the locking nut 7 along the keyway 801 before disassembling the locking nut 7, ensuring that the pressure point 701 will not damage the threads on the drive half-shaft 8 during the subsequent disassembly of the locking nut 7, thus reducing economic losses; by setting up an adjustment component 3, after the mounting shell 1 and the drive wheel side 9 are properly fitted, the guide rod 301 is rotated on the adjustment groove 103, so that the pressure head 501 is aligned with the keyway 801, thereby speeding up the removal of the locking nut 7.

Claims

1. A tooling for removing the mortise nut of a drive half-shaft, characterized in that: The device includes a mounting shell. A screw hole is fixedly opened at the center of the rear end of the mounting shell. Adjustment grooves are fixedly opened on both sides of the screw hole. A screw rod is threaded onto the screw hole. A bearing is fixedly opened at the front end of the screw rod. An inner seat is fixedly connected at the other end of the bearing. A screw hole is fixedly opened at the rear end of the inner seat. An adjustment component is provided on the screw hole. The adjustment component cooperates with the adjustment groove. A fixing frame is fixedly connected to the front end of the inner seat. A slot is fixedly opened on the fixing frame. A top pressure component is provided in the slot.

2. The tooling for removing the mortise nut of a drive half-shaft according to claim 1, characterized in that: The inner ring of the bearing is fitted with the outer wall of the screw, while the outer ring of the bearing is fitted with the inner seat. The front end face of the screw does not contact the inner seat.

3. The tooling for removing the mortise nut of a drive half-shaft according to claim 1, characterized in that: The mounting shell has a fixed window on its side wall, and a base is fixedly connected to the front end of the mounting shell, with a fixing hole on the base.

4. The tooling for removing the mortise nut of a drive half-shaft according to claim 1, characterized in that: The top-pressing assembly includes a pressure head that mates with a slot. A pin hole is fixedly opened in the middle of the pressure head, and a cylindrical pin is rotatably connected to the pin hole. Both ends of the cylindrical pin are fixedly connected to a fixing frame. A slot is fixedly opened on the bottom wall of the rear part of the pressure head, and a second compression spring is fixedly connected inside the slot. The other end of the second compression spring is fixedly connected to the inner wall of the slot. The front end of the pressure head is wedge-shaped. The pressure head is made of high-strength alloy steel, and the bottom wall of the front part of the pressure head mates with the fixing frame.

5. The tooling for removing the mortise nut of a drive half-shaft according to claim 1, characterized in that: The adjustment assembly includes a guide rod, a compression spring is fixedly provided on the outer wall of the guide rod, a washer is fixedly provided at the front end of the compression spring, the washer is in contact with the outer wall of the mounting shell, and a thread is fixedly provided at the front end of the guide rod, the thread is in contact with a screw hole.

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