Quick dismounting and mounting device for self-centering boring cutter

Abstract

The utility model relates to the field of machining, and discloses a self-centering boring cutter quick dismounting device which comprises a lifting component and a driving component, the lifting component is in threaded connection with the driving component, the lifting component comprises a boring cutter tray, a transmission shaft and a positioning guide pin, the boring cutter tray is connected to the upper end of the transmission shaft through a bolt, and the transmission shaft is connected with the positioning guide pin. A plurality of positioning pin holes are formed in the upper end of the boring cutter tray, the positioning guide pins are inserted into the positioning pin holes of the boring cutter tray, the driving component comprises a transmission sleeve and a positioning sleeve, the transmission sleeve is in threaded connection with the transmission shaft, the positioning sleeve is arranged outside the transmission sleeve in a sleeving mode, and a thrust ball bearing is arranged between the transmission sleeve and the positioning sleeve. The device is simple and reliable in structure, easy and labor-saving in the use process, accurate in positioning when the boring cutter is mounted, free of considering the axis centering problem, and capable of quickly replacing the boring cutter by only one worker, so that the labor and time cost is saved, and the problem that the yield of a production line is influenced due to the replacement of the boring cutter is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the field of machining, in particular to a quick disassembly and assembly device for a self-centering boring tool. Background Art

[0002] The engine block is the basic part of the engine. Through it, the crank connecting rod mechanism of the engine (including piston, connecting rod, flywheel, crankshaft, etc.), the valve train (cylinder head, camshaft, etc.), and the fuel, lubrication, cooling and other mechanisms are connected into a whole. Among them, the cylinder bore of the block is the space for diesel compression combustion and expansion, and plays a guiding role for the piston. The inner wall of the cylinder bore is one of the most severely worn surfaces of the engine, which determines the maximum overhaul period and service life of the engine.

[0003] To ensure the surface accuracy and dimensional accuracy of the cylinder bore, three steps of rough boring, semi-finish boring and finish boring are required for the cylinder bore. Among them, semi-finish boring is a preparatory process for finish boring, mainly to solve the uneven remaining allowance left during rough boring. For holes with high precision requirements, semi-finish boring is generally carried out in two times: the first time is mainly to remove the uneven remaining allowance left during rough boring; the second time is to bore the remaining allowance to improve the dimensional accuracy, shape accuracy of the hole and reduce the surface roughness. In addition, during the boring process, it is necessary to ensure the positioning accuracy between the boring tool and the block. Inaccurate positioning will cause problems such as uneven wall thickness at the bottom of the cylinder bore and uneven distribution of boring allowance.

[0004] During the production process, there will be engine blocks with the same cylinder center distance, the same cylinder diameter, but different numbers of cylinders being processed on the same production line. When changing the processing batch, it is usually necessary to reduce or increase the boring tools installed on the special boring machine for cylinder bores. Without a special device, only two operators can jointly drill into the special boring machine for cylinder bores and use tools such as wooden boards to hold the boring tool for disassembly or installation. This is very inconvenient for the operators, has potential safety hazards, affects the production rhythm, and may even affect the positioning accuracy. The boring tools are generally heavy. Limited by the volume and weight, when using a robotic arm to replace the boring tool, problems such as path settlement of the robotic arm or path interference with the special boring machine for cylinder bores often occur due to the self-weight and large volume of the boring tool. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is the problem that the existing boring tool is difficult to replace and is likely to affect the positioning accuracy.

[0006] To solve the above technical problems, the technical solution of the present utility model is to provide a quick disassembly and assembly device for a self-centering boring tool, which includes a lifting component and a driving component. The lifting component is threadedly connected to the driving component. The lifting component includes a boring tool tray, a transmission shaft, and a positioning guide pin. The boring tool tray is connected to the upper end of the transmission shaft by bolts. A plurality of positioning pin holes are provided on the upper end of the boring tool tray. The positioning guide pin is inserted into the positioning pin holes of the boring tool tray. The driving component includes a transmission sleeve and a positioning sleeve. The transmission sleeve is threadedly connected to the transmission shaft. The positioning sleeve is sleeved outside the transmission sleeve. A thrust ball bearing is provided between the transmission sleeve and the positioning sleeve.

[0007] Optionally, the boring tool tray, the transmission shaft, the transmission sleeve, and the positioning sleeve are coaxially arranged.

[0008] Optionally, the transmission shaft is in the shape of a T-shaped screw column, and a positioning counterbore and a screw hole are provided at its top end. The screw holes are located on both sides of the positioning counterbore. A protruding shaft is provided at the bottom of the boring tool tray, and the protruding shaft is located in the positioning counterbore. Bolts for fixing the boring tool tray are provided in the screw holes.

[0009] Optionally, a plurality of notches for avoiding the cutting edges of the boring tool are provided on the outer ring of the boring tool tray. The positioning guide pin is made of nylon material. A conical guide is provided at the head of the positioning guide pin, and the upper end of the positioning guide pin protrudes above the boring tool tray.

[0010] Optionally, a trapezoidal thread is provided on the outer side of the transmission shaft. The transmission sleeve is in the shape of a T-shaped nut, and a trapezoidal thread identical to that on the transmission shaft is provided on its inner hole. The transmission sleeve and the transmission shaft are threadedly connected to form a lead screw structure.

[0011] Optionally, a second counterbore is provided on the top surface of the transmission sleeve. The depth of the second counterbore is the same as the height of the top of the transmission shaft, and the inner diameter of the second counterbore is the same as the outer diameter of the top of the transmission shaft. The top of the transmission shaft can be inserted into the second counterbore.

[0012] Optionally, the positioning sleeve is sleeved on the small-diameter section at the lower end of the transmission sleeve, and an annular step is provided on the outside of the positioning sleeve.

[0013] Optionally, a third counterbore is provided on the top surface of the positioning sleeve. A thrust ball bearing is placed in the third counterbore. The inner diameter of the third counterbore is the same as the outer diameter of the thrust ball bearing, and the depth of the third counterbore is less than the thickness of the thrust ball bearing.

[0014] Optionally, a plurality of threaded holes are provided on the outer side of the large-diameter section at the upper end of the transmission sleeve, and handles are provided in the threaded holes.

[0015] Optionally, the outer diameter of the handle is smaller than the thickness of the large-diameter section of the transmission sleeve. Parallel grooves are provided on the surface of the handle, and a through hole is provided at the tail of the handle.

[0016] In summary, the utility model is driven by a lead screw structure, which is simple and reliable. During use, it is labor-saving and easy to operate. When installing the boring tool, the positioning is accurate, and there is no need to consider the axis alignment problem. It has a built-in boring tool edge protection structure, and its own structure ensures that the boring tool will not tilt. Only one staff member can quickly replace the boring tool, saving a large amount of labor costs and time costs, and effectively avoiding the problem of affecting the production line output due to the replacement of the boring tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is an assembly application schematic diagram of the quick disassembly and assembly device for the self-centering boring tool of the utility model;

[0018] Figure 2 is a combined schematic diagram of the quick disassembly and assembly device for the self-centering boring tool of the utility model;

[0019] Figure 3 is a structural schematic diagram of the lifting component of the quick disassembly and assembly device for the self-centering boring tool of the utility model;

[0020] Figure 4 is a structural schematic diagram of the driving component of the quick disassembly and assembly device for the self-centering boring tool of the utility model;

[0021] Figure 5 is a structural schematic diagram of the boring tool tray in the quick disassembly and assembly device for the self-centering boring tool of the utility model;

[0022] Figure 6 is a top view structural schematic diagram of the boring tool tray in the quick disassembly and assembly device for the self-centering boring tool of the utility model;

[0023] Figure 7 is a structural schematic diagram of the transmission shaft in the quick disassembly and assembly device for the self-centering boring tool of the utility model;

[0024] Figure 8 is a structural schematic diagram of the transmission sleeve in the quick disassembly and assembly device for the self-centering boring tool of the utility model;

[0025] Figure 9 is a structural schematic diagram of the positioning sleeve in the quick disassembly and assembly device for the self-centering boring tool of the utility model;

[0026] Figure 10 is a structural schematic diagram of the positioning guide pin in the quick disassembly and assembly device for the self-centering boring tool of the utility model;

[0027] Figure 11 is a structural schematic diagram of the handle in the quick disassembly and assembly device for the self-centering boring tool of the utility model;

[0028] Figure 12 is a structural schematic diagram of the thrust ball bearing in the quick disassembly and assembly device for the self-centering boring tool of the utility model;

[0029] In the figure: 1. boring tool tray; 11. locating pin hole; 12. notch; 13. protruding shaft; 2. transmission shaft; 21. locating countersunk hole; 3. transmission sleeve; 31. threaded hole; 32. second countersunk hole; 4. locating sleeve; 41. third countersunk hole; 42. annular step; 5. locating guide pin; 51. tapered guide; 6. handle; 61. parallel groove; 62. through hole; 7. thrust ball bearing. DETAILED DESCRIPTION

[0030] The following combination Figure 1-12 The utility model is described in further detail.

[0031] The utility model discloses a self-centering boring tool quick disassembly and assembly device, referring to Figures 2 to 4 , including a lifting component and a driving component, the lifting component is threadedly connected to the driving component, the lifting component includes a boring tool tray 1, a transmission shaft 2 and a positioning guide pin 5, the boring tool tray 1 is connected to the upper end of the transmission shaft 2 by bolts, and a plurality of positioning pin holes 11 are provided on the upper end of the boring tool tray 1, and the positioning guide pin 5 is inserted into the positioning pin holes 11 of the boring tool tray 1, the driving component includes a transmission sleeve 3 and a positioning sleeve 4, the transmission sleeve 3 is threadedly connected to the transmission shaft 2, the positioning sleeve 4 is sleeved on the outside of the transmission sleeve 3, and a thrust ball bearing 7 is provided between the transmission sleeve 3 and the positioning sleeve 4, and the boring tool tray 1, the transmission shaft 2, the transmission sleeve 3 and the positioning sleeve 4 are coaxially arranged.

[0032] In a further embodiment, referring to Figures 5 to 7 The transmission shaft 2 is in the shape of a T-shaped stud, and a positioning countersunk hole 21 and a screw hole are provided at the top thereof. The screw holes are located on both sides of the positioning countersunk hole 21. A protruding shaft 13 is provided at the bottom of the boring tool tray 1. The protruding shaft 13 is located in the positioning countersunk hole 21. A bolt for fixing the boring tool tray 1 is provided in the screw hole. The outer ring of the boring tool tray 1 is provided with a plurality of notches 12 for avoiding the boring tool blade. Figure 10 The positioning guide pin 5 is made of nylon, and a conical guide 51 is provided at the head of the positioning guide pin 5. The upper end of the positioning guide pin 5 is higher than the boring tool tray 1. The height of the positioning guide pin 5 higher than the upper end surface of the boring tool tray 1 must be greater than the distance between the lower end surface of the boring tool and the blade;

[0033] Specifically, the boring tool tray 1 is disc-shaped as a whole, and a second positioning countersunk hole is provided on the top to facilitate the safe placement of the boring tool. A guiding angle is provided on the upper part of the second positioning countersunk hole to facilitate the smooth placement of the boring tool. A certain gap is provided between the inner hole of the second positioning countersunk hole and the maximum outer circle of the boring tool to ensure the accurate insertion of the boring tool and the spindle positioning mandrel; four notches are provided on the circumference of the boring tool tray 1, and the positions of the notches are consistent with the four tool holders on the circumference of the bottom of the boring tool, and the size of the notches is larger than the size of the boring tool tool holder;

[0034] In a further embodiment, referring to Figure 8, a trapezoidal thread is provided on the outer side of the transmission shaft 2. The screw stroke of the transmission shaft 2 is not less than the stroke required for the lifting during the disassembly and assembly of the boring tool. The transmission sleeve 3 is in the shape of a T-shaped nut, and a trapezoidal thread same as that on the transmission shaft 2 is provided on its inner hole. The transmission sleeve 3 and the transmission shaft 2 are thread-connected to form a lead screw structure. A second counterbore 32 is provided on the top surface of the transmission sleeve 3. The depth of the second counterbore 32 is the same as the height of the top of the transmission shaft 2, and the inner diameter of the second counterbore 32 is the same as the outer diameter of the top of the transmission shaft 2. The top of the transmission shaft 2 can be inserted into the second counterbore 32. The positioning sleeve 4 is sleeved on the small-diameter section at the lower end of the transmission sleeve 3, and an annular step 42 is provided on the outside of the positioning sleeve 4.

[0035] In a further embodiment, referring to Figure 9 and Figure 12 , a third counterbore 41 is provided on the top surface of the positioning sleeve 4. A thrust ball bearing 7 is placed in the third counterbore 41. The inner diameter of the third counterbore 41 is the same as the outer diameter of the thrust ball bearing 7, and the depth of the third counterbore 41 is less than the thickness of the thrust ball bearing 7 to ensure that the surface of the thrust ball bearing 7 extends beyond the upper surface of the positioning sleeve 4;

[0036] Specifically, the outer diameter dimension of the positioning sleeve 4 is consistent with the inner diameter dimension of the cylinder bore of the engine block. The annular step 42 on the outside of the positioning sleeve 4 is erected on the top surface of the block during use to provide support for the whole set of devices and the boring tool. The specification of the thrust ball bearing 7 is thrust ball bearing type 51112.

[0037] In a further embodiment, referring to Figure 8 and Figure 11 , a plurality of threaded holes 31 are provided on the outer side of the large-diameter section at the upper end of the transmission sleeve 3. A handle 6 is provided in the threaded holes 31. The outer diameter of the handle 6 is less than the thickness of the large-diameter section of the transmission sleeve 3. Parallel grooves 61 are provided on the surface of the handle 6 for facilitating the disassembly and installation with a wrench. A through hole 62 is provided at the tail of the handle 6. When the boring tool is lifted to the required position, a pin is inserted through the through hole 62 to fix the driving component.

[0038] When the present utility model is in use, referring to Figure 1 , when assembling the boring tool, the following steps are included:

[0039] Step 1: Place the whole driving component on the corresponding cylinder bore to ensure that the positioning sleeve 4 in the driving component is stably seated in the cylinder bore;

[0040] Step 2: Insert the lifting component into the driving component, and turn the handle 6 until the lower end face of the boring tool tray 1 is attached to the upper end face of the transmission sleeve 3, and then make the boring tool stably seated on the boring tool tray 1 with the aid of the positioning guide pin 5, and pay attention to protecting the cutting edge during this period;

[0041] Step 3: Push the block along the roller path into the designated position of the cylinder bore boring special machine;

[0042] Step 4: After the positioning of the machine body is completed, rotate the cutter body of the boring tool counterclockwise to make the lifting component and the boring tool rotate and rise synchronously. Stop rotating the boring tool when approaching the assembly position of the boring tool; adjust the boring tool so that its mounting hole aligns with the corresponding hole position of the boring machine for boring cylinder holes.

[0043] Step 5: Rotate the handle 6 counterclockwise to make the lifting component and the boring tool rise linearly synchronously.

[0044] Step 6: When the boring tool rises to the installation position, confirm that the hole positions are consistent. Insert the pin into the through hole 62 on the handle 6, and then fix the boring tool to the corresponding position of the boring machine for boring cylinder holes to complete the assembly of the boring tool.

[0045] When disassembling the boring tool, the following steps are included:

[0046] Step 1: Place the driving component as a whole on the corresponding cylinder hole, ensure that the positioning sleeve 4 in the driving component is seated stably in the cylinder hole, and then insert the lifting component into the driving component and push the machine body along the roller path into the designated position of the boring machine for boring cylinder holes.

[0047] Step 2: After the positioning of the machine body is completed, rotate the lifting component counterclockwise until the boring tool tray 1 approaches the boring tool, and then rotate the handle 6 counterclockwise until the boring tool tray 1 is completely fitted with the boring tool.

[0048] Step 3: Insert the pin into the through hole 62 on the handle 6 and use tools to disassemble the boring tool from the boring machine for boring cylinder holes.

[0049] Step 4: After the disassembly is completed, pull out the pin in the through hole 62 on the handle 6 and rotate the handle 6 clockwise until the lower end face of the boring tool tray 1 is fitted with the upper end face of the transmission sleeve 3.

[0050] Step 5: Push the machine body along the roller path out of the inside of the boring machine for boring cylinder holes to complete the disassembly of the boring tool.

[0051] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. Self-centering boring tool quick disassembly and assembly device, characterized in that, It includes a lifting component and a driving component. The lifting component is threadedly connected to the driving component. The lifting component includes a boring tool tray (1), a transmission shaft (2), and a positioning guide pin (5). The boring tool tray (1) is bolted to the upper end of the transmission shaft (2). A plurality of positioning pin holes (11) are provided at the upper end of the boring tool tray (1). The positioning guide pin (5) is inserted into the positioning pin holes (11) of the boring tool tray (1). The driving component includes a transmission sleeve (3) and a positioning sleeve (4). The transmission sleeve (3) is threadedly connected to the transmission shaft (2). The positioning sleeve (4) is sleeved outside the transmission sleeve (3). A thrust ball bearing (7) is provided between the transmission sleeve (3) and the positioning sleeve (4).

2. The quick disassembly and assembly device for the self-centering boring tool according to claim 1, characterized in that The boring tool tray (1), the transmission shaft (2), the transmission sleeve (3), and the positioning sleeve (4) are coaxially arranged.

3. The quick disassembly and assembly device for the self-centering boring tool according to claim 1, characterized in that, The transmission shaft (2) is in the shape of a T-shaped screw column, and a positioning counterbore (21) and screw holes are provided at its top end. The screw holes are located on both sides of the positioning counterbore (21). A protruding shaft (13) is provided at the bottom of the boring tool tray (1). The protruding shaft (13) is located in the positioning counterbore (21), and bolts for fixing the boring tool tray (1) are provided in the screw holes.

4. The quick disassembly and assembly device for the self-centering boring tool according to claim 3, characterized in that, A plurality of notches (12) for avoiding the cutting edges of the boring tool are provided on the outer circle of the boring tool tray (1). The positioning guide pin (5) is made of nylon. A conical guide (51) is provided at the head of the positioning guide pin (5). The upper end of the positioning guide pin (5) protrudes above the boring tool tray (1).

5. The quick disassembling and assembling device for the self-centering boring tool according to claim 3, wherein A trapezoidal thread is provided on the outside of the transmission shaft (2). The transmission sleeve (3) is in the shape of a T-shaped nut, and a trapezoidal thread the same as that on the transmission shaft (2) is provided on its inner hole. The transmission sleeve (3) and the transmission shaft (2) are threadedly connected to form a lead screw structure.

6. The quick disassembling and assembling device for the self-centering boring tool according to claim 5, characterized in that, A second counterbore (32) is provided on the top surface of the transmission sleeve (3). The depth of the second counterbore (32) is the same as the height of the top of the transmission shaft (2), and the inner diameter of the second counterbore (32) is the same as the outer diameter of the top of the transmission shaft (2). The top of the transmission shaft (2) can be inserted into the second counterbore (32).

7. The quick disassembly and assembly device for the self-centering boring tool according to claim 5, characterized in that, The positioning sleeve (4) is sleeved on the lower small-diameter section of the transmission sleeve (3). An annular step (42) is provided on the outside of the positioning sleeve (4).

8. The quick disassembly and assembly device for the self-centering boring tool according to claim 7, characterized in that A third counterbore (41) is provided on the top surface of the positioning sleeve (4). The thrust ball bearing (7) is placed in the third counterbore (41). The inner diameter of the third counterbore (41) is the same as the outer diameter of the thrust ball bearing (7), and the depth of the third counterbore (41) is less than the thickness of the thrust ball bearing (7).

9. The quick disassembly and assembly device for the self-centering boring tool according to claim 5, characterized in that, A plurality of threaded holes (31) are provided on the outside of the large-diameter section at the upper end of the transmission sleeve (3). A handle (6) is provided in the threaded holes (31).

10. The quick disassembly and assembly device for the self-centering boring tool according to claim 9, wherein The outer diameter of the handle (6) is smaller than the thickness of the large-diameter section of the transmission sleeve (3). Parallel grooves (61) are provided on the surface of the handle (6). A through hole (62) is provided at the tail of the handle (6).

Images