Disassembling and assembling device and method for clamping ring in deep hole cavity channel of fuel injection pump

Abstract

The invention provides a dismounting and mounting device and method for a clamping ring in a deep hole cavity channel of an oil injection pump, the dismounting and mounting device comprises a pressing sleeve and a pressing block, a sleeving groove is formed in the bottom of the pressing sleeve, the pressing sleeve is connected to the outer side of the pressing block in a sleeving mode through the sleeving groove and can vertically move along the pressing block, and an annular protruding edge is horizontally and outwards arranged in the circumferential direction of the bottom of the pressing block. A pressing connection edge protruding downwards is arranged at the bottom end of the pressing sleeve in the circumferential direction of the opening of the sleeving connection groove, a gap is formed between the inner wall of the pressing connection edge and the pressing block, and the vertical projection of the outer side wall of the annular protruding edge is located on the inner side of the inner side wall of the pressing connection edge. The device has the beneficial effects that the device is convenient to operate and small in occupied space, the pressing sleeve and the pressing block are matched with each other, the clamping ring is effectively disassembled and assembled in the cavity channel, and the smoothness of the inner wall of the cavity channel is not damaged.

Description

Technical Field

[0001] The invention belongs to the technical field of disassembly and assembly of a clamping ring in a deep hole channel of a fuel injection pump, and in particular relates to a disassembly and assembly device and a disassembly and assembly method of a clamping ring in a deep hole channel of a fuel injection pump. Background Art

[0002] The function of the hole snap ring is to be installed in the round hole to fix the axial movement of the parts. The hole snap ring is installed in the deep hole cavity of the injection pump to fix the movement of the plunger spring and the spring upper seat plate to ensure that the plunger is smoothly reset under the action of the plunger spring during the camshaft oil leakage stroke.

[0003] However, since the installation position of the retaining ring in the deep hole cavity of the fuel injection pump is far away from the upper end surface of the pump body, about 10 cm, and the cavity is deep, the operator cannot use the traditional circlip pliers assembly method to directly install the retaining ring in place. When the retaining ring is in a free state, its outer diameter is larger than the cavity hole diameter. Even if it is installed in place, the inner wall of the cavity is easily scratched during the assembly process, and it is also difficult to remove the retaining ring. Summary of the invention

[0004] In view of this, the present invention aims to overcome the deficiencies of the above-mentioned problems in the prior art and proposes a disassembly and assembly device and a disassembly and assembly method for a retaining ring in a deep hole cavity of a fuel injection pump.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] A device for disassembling and assembling a retaining ring in a deep hole cavity of an injection pump comprises a pressing sleeve and a pressing block. A sleeve groove is provided at the bottom of the pressing sleeve. The pressing sleeve is sleeved on the outside of the pressing block through the sleeve groove and can move vertically along the pressing block. An annular convex edge is provided horizontally outwardly in the circumferential direction of the bottom of the pressing block. A downwardly protruding crimping edge is provided circumferentially at the bottom end of the pressing sleeve along the opening of the sleeve groove, and a gap is provided between the inner wall of the crimping edge and the pressing block. The vertical projection of the outer wall of the annular convex edge is located on the inner side of the inner wall of the crimping edge.

[0007] Furthermore, a connecting rod is vertically fixed to the upper side of the pressing block, and the connecting rod passes through the sleeve through the sleeve groove, and the pressing sleeve can move vertically along the connecting rod.

[0008] Furthermore, a pressing plate is overlapped on the top of the pressing sleeve, a connecting rod is arranged through the pressing plate, and the pressing plate can move vertically along the connecting rod.

[0009] Furthermore, a threaded hole is provided on the upper side of the pressing block, and the lower part of the connecting rod is screwed into the threaded hole.

[0010] The present application also provides a method for disassembling and assembling a clamping ring in a deep hole cavity of an injection pump, and installing the clamping ring in the cavity comprises the following steps: sleeve the clamping ring on the outside of the pressure block and overlap the upper side of the annular convex edge, then sleeve the pressure sleeve on the pressure block, move the pressure block from the cavity opening inward into the cavity until the pressure block contacts the spring upper seat disk in the cavity, press the pressure sleeve downward when the crimping edge of the pressure sleeve contacts the clamping ring, the crimping edge removes the clamping ring from the annular convex edge and moves to sleeve the outer circle of the top end of the spring upper seat disk to expand the clamping ring, and continues to press the pressure sleeve downward, and the crimping edge continues to press down the clamping ring, so that the clamping ring moves up and down on the outer circle of the top end of the spring upper seat disk until it is clamped in the clamping ring groove in the cavity;

[0011] Removing the snap ring from the cavity includes the following steps: placing the pressure block into the cavity until it contacts the spring upper seat disk, pressing the pressure block, and the snap ring moves downward with the spring upper seat disk under the action of pressure; when the snap ring contacts the lower edge of the snap ring groove, under the action of the snap ring groove resistance, the snap ring detaches from the spring upper seat disk and is sleeved on the outside of the pressure block under the action of its own rebound force, and then the pressure block is taken out of the cavity.

[0012] Furthermore, when the clamping ring is sleeved on the outside of the pressing block and overlapped on the annular convex edge, the vertical projection of the crimping edge is located on the clamping ring.

[0013] Furthermore, the outer diameter of the annular convex edge is consistent with the diameter of the outer circle of the top end of the spring upper seat disk.

[0014] Furthermore, when the clamping ring is sleeved on the pressing block, the outer diameter of the clamping ring is smaller than the aperture of the cavity.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] When the disassembling and assembling device for the clamping ring in the deep hole cavity of the fuel injection pump is used, the clamping ring is sleeved on the outside of the pressure block, and the clamping ring is in contact with the upper side of the annular convex edge. The disassembling and assembling device with the clamping ring installed is placed in the cavity, the pressing sleeve is pressed down, so that the crimping edge presses down on the clamping ring, the clamping ring expands and is taken off from the annular convex edge, sleeved on the outer circle of the spring upper seat plate in the cavity, and clamped into the clamping ring groove in the cavity; when the clamping ring needs to be removed from the cavity, it is only necessary to put the pressure block into the cavity and contact the spring upper seat plate, press the pressure block down, so that the spring upper seat plate moves downward, and the clamping ring and the clamping ring groove are blocked to separate from the spring upper seat plate, and then sleeved on the pressure block, and the pressure block can be taken out. The device is simple to process, convenient to operate when in use, and occupies a small space. The mutual cooperation of the pressure sleeve and the pressure block is utilized to effectively disassemble and assemble the clamping ring in the cavity without damaging the smoothness of the inner wall of the cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 It is a schematic structural diagram of a disassembly and assembly device for a retaining ring in a deep hole cavity of a fuel injection pump according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the installation state of the retaining ring described in an embodiment of the present invention in the cavity of a fuel injection pump.

[0020] Description of reference numerals:

[0021] 1. Pressing sleeve; 11. Sleeve groove; 12. Pressing edge; 2. Pressing block; 21. Annular convex edge; 22. Threaded hole; 23. Weight reduction groove; 3. Connecting rod; 4. Pressing plate; 5. Snap ring; 6. Gap; 7. Fuel injection pump; 71. Cavity; 72. Snap ring groove; 8. Spring upper seat plate. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0025] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0026] As shown in the figure, a disassembly and assembly device for a retaining ring in a deep hole cavity of a fuel injection pump comprises a pressing sleeve 1 and a pressing block 2. A sleeve groove 11 is provided at the bottom of the pressing sleeve 1. The pressing sleeve 1 is sleeved on the outside of the pressing block 2 through the sleeve groove 11 and can move vertically along the pressing block 2. An annular convex edge 21 is provided horizontally outwardly at the bottom of the pressing block 2. A downwardly protruding crimping edge 12 is provided circumferentially at the bottom end of the pressing sleeve 1 along the opening of the sleeve groove 11, and a gap 6 is provided between the inner wall of the crimping edge 12 and the pressing block 2. The vertical projection of the outer wall of the annular convex edge 21 is located on the inner side of the inner wall of the crimping edge 12. In this embodiment, when in use, the snap ring 5 is sleeved on the outside of the pressure block 2, and the snap ring 5 is in contact with the upper side of the annular convex edge 21, the disassembly and assembly device with the snap ring 5 installed is placed in the cavity 71, the pressing sleeve 1 is pressed down, so that the crimping edge 12 presses down on the snap ring 5, the snap ring 5 expands and is removed from the annular convex edge 21, and is sleeved on the outer circle of the spring upper seat disk 8 in the cavity 71, and is clamped into the snap ring groove 72 in the cavity 71; when it is necessary to remove the snap ring 5 from the cavity 71, it is only necessary to put the pressure block 2 into the cavity 71 and contact the spring upper seat disk 8, press the pressure block 2 down, so that the spring upper seat disk 8 moves downward, and the snap ring 5 and the snap ring groove 72 are detached from the spring upper seat disk 8 under the obstruction of the spring upper seat disk 8, and then sleeved on the pressure block 2, and the pressure block 2 can be taken out.

[0027] A connecting rod 3 is vertically fixed to the upper side of the pressing block 2, and the connecting rod 3 passes through the sleeve 1 through the sleeve groove 11, and the sleeve 1 can move vertically along the connecting rod 3. In this embodiment, the connecting rod 3 is provided to guide the movement of the sleeve 1 on the one hand, and to facilitate the placement of the pressing block 2 in the cavity 71 on the other hand.

[0028] A pressing plate 4 is overlapped at the top of the pressing sleeve 1, and the connecting rod 3 is arranged through the pressing plate 4, and the pressing plate 4 can move vertically along the connecting rod 3. In this embodiment, when in use, the pressing plate 4 is located above the cavity 71, and the pressing sleeve 1 can be pressed down to separate the clamping ring 5 from the pressing block 2 by operating the pressing plate 4 outside the cavity 71, and the pressing plate 4 is arranged to increase the pressing operation surface, which is more convenient to operate.

[0029] A threaded hole 22 is provided on the upper side of the pressing block 2, and the lower part of the connecting rod 3 is screwed into the threaded hole 22. In this embodiment, the connecting rod 3 is a screw structure.

[0030] A weight-reducing groove 23 is provided inwardly at the bottom of the pressing block 2 to save production materials and reduce the weight of the device.

[0031] The present application also provides a method for disassembling and assembling a snap ring in a deep hole cavity of an injection pump, and installing the snap ring 5 in the cavity 71 includes the following steps: sleeve the snap ring 5 on the outside of the pressure block 2 and overlap the upper side of the annular convex edge 21, then sleeve the pressure sleeve 1 on the pressure block 2, and move the pressure block 2 from the opening of the cavity 71 inward into the cavity 71 until the pressure block 2 contacts the spring upper seat plate 8 in the cavity 71, and when the crimping edge 12 of the pressure sleeve 1 contacts the snap ring 5, the pressure sleeve 1 is pressed downward, and the crimping edge 12 removes the snap ring 5 from the annular convex edge 21 and moves to sleeve the outer circle of the top end of the spring upper seat plate 8 to open the snap ring 5, and continues to press the pressure sleeve 1 downward, and the crimping edge 12 continues to press the snap ring 5 downward, so that the snap ring 5 moves up and down on the outer circle of the top end of the spring upper seat plate 8 until it is clamped in the snap ring groove 72 in the cavity 71;

[0032] Removing the snap ring 5 from the cavity 71 includes the following steps: placing the pressure block 2 into the cavity 71 until it contacts the spring upper seat plate 8, pressing the pressure block 2, and the snap ring 5 moves downward with the spring upper seat plate 8 under the action of pressure; when the snap ring 5 contacts the lower edge of the snap ring groove 72, under the action of the resistance of the snap ring groove 72, the snap ring 5 detaches from the spring upper seat plate 8 and is sleeved on the outside of the pressure block 2 under the action of its own rebound force, and then the pressure block 2 is taken out of the cavity 71.

[0033] When the clamping ring 5 is sleeved on the outside of the pressing block 2 and overlapped on the annular convex edge 21, the vertical projection of the crimping edge 12 is located on the clamping ring 5, ensuring that the clamping ring 5 can be smoothly removed from the pressing block 2 when the crimping edge 12 moves downward.

[0034] The outer diameter of the annular convex edge 21 matches the outer diameter of the top of the spring upper seat disc 8, ensuring that the press sleeve 1 can be smoothly sleeved on the outer diameter of the top of the spring upper seat disc 8 after the snap ring 5 is removed from the annular convex edge 21.

[0035] When the clamping ring 5 is sleeved on the pressing block 2, the outer diameter of the clamping ring 5 is smaller than the aperture of the cavity 71, ensuring that the clamping ring 5 and the pressing sleeve 1 can smoothly enter the cavity 71 without damaging the smoothness of the inner wall of the cavity 71. In this embodiment, the difference between the aperture of the cavity 71 and the outer diameter of the clamping ring 5 is greater than 0.3 mm and less than 1 mm.

[0036] In this embodiment, when installing the snap ring 5, the snap ring 5 is sleeved on the pressure block 2, and then the pressure sleeve 1 is sleeved on the pressure block 2, and the pressure plate 4 and the pressure sleeve 1 and the pressure block 2 are combined in series with the connecting rod 3, and the combined device is placed in the cavity 71, and the pressure plate 4 is pressed, and the pressure plate 4 pushes the pressure sleeve 1 to move downward until the snap ring 5 is taken off and stuck in the snap ring groove 72 in the cavity 71; when removing the snap ring 5 in the cavity 71, only the pressure block 2 and the connecting rod 3 are required, which is particularly suitable for the situation where the pressure block 2 completely enters the cavity 71, and the upper part of the connecting rod 3 is always exposed to the cavity 71. The pressure block 2 is placed in the cavity 71, the screw is pressed, and the pressure block 2 moves downward until it contacts the spring upper seat plate 8, and the screw is continued to be pressed. The spring upper seat plate 8 moves downward and cooperates with the snap ring groove 72, so that the snap ring 5 is separated from the snap ring groove 72 and sleeved on the pressure block 2, and it can be taken out.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A disassembly and assembly device for a retaining ring in a deep hole cavity of a fuel injection pump, characterized in that: It includes a pressing sleeve and a pressing block. A sleeve groove is provided at the bottom of the pressing sleeve. The pressing sleeve is sleeved on the outside of the pressing block through the sleeve groove and can move vertically along the pressing block. An annular convex edge is provided horizontally outwardly at the bottom of the pressing block. A downwardly protruding crimping edge is provided at the bottom end of the pressing sleeve along the opening of the sleeve groove. A gap is provided between the inner wall of the crimping edge and the pressing block. The vertical projection of the outer wall of the annular convex edge is located on the inner side of the inner wall of the crimping edge.

2. The disassembly and assembly device of the retaining ring in the deep hole cavity of the fuel injection pump according to claim 1, characterized in that: A connecting rod is vertically fixedly connected to the upper side of the pressing block, and the connecting rod passes through the sleeve groove to be arranged on the pressing sleeve, and the pressing sleeve can move vertically along the connecting rod.

3. The disassembly and assembly device of the retaining ring in the deep hole cavity of the fuel injection pump according to claim 2, characterized in that: A pressing plate is overlapped on the top of the pressing sleeve, a connecting rod is arranged through the pressing plate, and the pressing plate can move vertically along the connecting rod.

4. The device for disassembling and assembling a retaining ring in a deep hole of a fuel injection pump according to claim 2, characterized in that: A threaded hole is provided on the upper side of the pressing block, and the lower part of the connecting rod is screwed into the threaded hole.

5. A method for disassembling and assembling a retaining ring in a deep hole cavity of a fuel injection pump, characterized in that: The disassembly and assembly is performed using a disassembly and assembly device for a retaining ring in a deep hole cavity of a fuel injection pump as described in any one of claims 1 to 4.

6. A method for disassembling and assembling a retaining ring in a deep hole of a fuel injection pump according to claim 5, characterized in that: Installing the clamping ring in the cavity includes the following steps: sleeve the clamping ring on the outside of the pressure block and overlap the upper side of the annular convex edge, then sleeve the pressure sleeve on the pressure block, move the pressure block from the cavity opening inward into the cavity until the pressure block contacts the spring upper seat disk in the cavity, press the pressure sleeve downward when the crimping edge of the pressure sleeve contacts the clamping ring, the crimping edge removes the clamping ring from the annular convex edge and moves to sleeve on the outer circle of the top end of the spring upper seat disk to expand the clamping ring, continue to press the pressure sleeve downward, and the crimping edge continues to press down the clamping ring, so that the clamping ring moves up and down on the outer circle of the top end of the spring upper seat disk until it is clamped in the clamping ring groove in the cavity; Removing the snap ring from the cavity includes the following steps: placing the pressure block into the cavity until it contacts the spring upper seat disk, pressing the pressure block, and the snap ring moves downward with the spring upper seat disk under the action of pressure; when the snap ring contacts the lower edge of the snap ring groove, under the action of the snap ring groove resistance, the snap ring detaches from the spring upper seat disk and is sleeved on the outside of the pressure block under the action of its own rebound force, and then the pressure block is taken out of the cavity.

7. The method for disassembling and assembling a retaining ring in a deep hole of a fuel injection pump according to claim 5, characterized in that: When the clamping ring is sleeved on the outer side of the pressing block and overlapped on the annular convex edge, the vertical projection of the crimping edge is located on the clamping ring.

8. The method for disassembling and assembling a retaining ring in a deep hole of a fuel injection pump according to claim 5, characterized in that: The outer diameter of the annular convex edge is consistent with the diameter of the outer circle of the top end of the spring upper seat disk.

9. The method for disassembling and assembling a retaining ring in a deep hole of a fuel injection pump according to claim 5, characterized in that: When the clamping ring is sleeved on the pressing block, the outer diameter of the clamping ring is smaller than the aperture of the cavity.

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