Crankshaft de-weighting hole positioning tool

Abstract

The utility model provides a crankshaft de-weighting hole positioning tool, and relates to the technical field of crankshaft positioning. The crankshaft de-weighting hole positioning tool comprises a machining table and a positioning device, a first supporting seat and a second supporting seat are arranged at the two ends of the machining table correspondingly, and pressing devices are arranged on the first supporting seat and the second supporting seat correspondingly; the pressing device comprises a rack installed on the first supporting seat or the second supporting seat in a sliding mode, an incomplete gear meshed with the rack and a pressing piece installed on the incomplete gear, and the pressing piece is used for pressing the main journal. The positioning device comprises a positioning block installed on the machining table and a positioning bolt in threaded connection with the positioning block, a positioning groove is formed in the positioning block, and the end, located in the positioning groove, of the positioning bolt makes rigid contact with the connecting rod journal. A main journal and a connecting rod journal of the crankshaft can be pressed and positioned, circumferential fixing of the crankshaft is achieved, and the stability of the crankshaft in the machining process is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of crankshaft positioning, in particular to a crankshaft deweighting hole positioning tool. Background Art

[0002] The crankshaft is the most important component in the engine. It receives the force from the connecting rod and converts it into torque, which is then output through the crankshaft and used to power other accessories. During the first week of production, the quality of the C15DR crankshaft de-weighting holes remained unstable, with the holes deviating from the centerline of the bearing bushing, resulting in nearly 10 pieces being scrapped.

[0003] When the existing general rotary tooling equipment drills the fourth small tile de-weighting hole against the big head, in order to avoid friction between the drill clamping handle and the pressure rod, the width of the big head is only half, and the pressure has been adjusted to the limit. The de-weighting hole has a large diameter (Φ15) and the cutting resistance is large. The drilling easily causes the crankshaft to rotate circumferentially and produce waste. Utility Model Content

[0004] The purpose of the utility model is to provide a crankshaft deweighting hole positioning tool, which can respectively press and position the main journal and connecting rod journal of the crankshaft, realize circumferential fixation of different parts of the crankshaft, and improve the stability of the crankshaft during processing.

[0005] The utility model is achieved through the following technical solutions:

[0006] A crankshaft deweighting hole positioning tool comprises a processing table and a positioning device, wherein a first support seat and a second support seat are respectively provided at both ends of the processing table, and a clamping device is provided on the first support seat and the second support seat; the clamping device comprises a rack slidably mounted on the first support seat or the second support seat, an incomplete gear meshing with the rack, and a clamping piece mounted on the incomplete gear, and the clamping piece is used to clamp the main shaft neck; the positioning device comprises a positioning block mounted on the processing table and a positioning bolt threadedly connected to the positioning block, a positioning groove is provided on the positioning block, and one end of the positioning bolt located in the positioning groove is in rigid contact with the connecting rod journal.

[0007] Furthermore, both the first support seat and the second support seat are provided with V-shaped grooves.

[0008] Furthermore, a fixing plate is provided on both sides of the first supporting seat and the second supporting seat, and the incomplete gear is connected to the fixing plate via a rotating shaft.

[0009] Furthermore, a slide groove is provided on the top of each of the first support seat and the second support seat, and the rack is slidably installed in the slide groove. A cylinder is provided in the slide groove, and a piston rod of the cylinder is connected to the rack.

[0010] Furthermore, the pressing member includes a pressing rod, the pressing rod includes a connecting portion and a pressing portion, the connecting portion is connected to the incomplete gear, a pressing groove is provided at the bottom end of the pressing portion, and the pressing groove is in an inverted V shape or an arc shape.

[0011] Furthermore, the positioning groove is U-shaped, one side of the positioning groove is a curved surface, and the other side of the positioning groove is provided with a screw hole, and the positioning bolt is installed in the screw hole.

[0012] Furthermore, the processing table is provided with a plurality of dovetail grooves, and the first support seat, the second support seat and the positioning block are all slidably mounted in the dovetail grooves.

[0013] The technical solution of the utility model has at least the following advantages and beneficial effects:

[0014] In the present invention, the first support seat and the second support seat are used to support the two ends of the crankshaft, and the clamping device is used to clamp the main journals at both ends of the crankshaft. Specifically, the incomplete gear is rotated by moving the rack, and the incomplete gear rotates clockwise or counterclockwise, so that the clamping member moves away from or close to the main journal, thereby achieving the clamping and fixing of the main journal. The crankshaft connecting rod journal is circumferentially positioned and fixed by the positioning device. When the connecting rod journal is located in the positioning groove on the positioning block, the positioning bolt is rotated to press it against the outer surface of the connecting rod journal to achieve the fixing of the connecting rod journal. It can achieve circumferential fixation of different parts of the crankshaft, improve the stability of the crankshaft during processing, avoid the circumferential rotation of the crankshaft caused by insufficient clamping of the main journal, and reduce the scrap rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 A schematic diagram of the structure of the crankshaft de-weighting hole positioning tool provided in Example 1 of the present utility model;

[0017] Figure 2 This is a left side view of the crankshaft deweighting hole positioning tool provided in Example 1 of the present utility model;

[0018] Figure 3 A partial cross-sectional view of the crankshaft deweighting hole positioning tool provided in Example 1 of the present utility model;

[0019] Figure 4 This is a top view of the crankshaft deweighting hole positioning tool provided in Example 1 of the utility model.

[0020] Icons: 1-processing table, 2-positioning device, 3-first support seat, 4-second support seat, 5-V-groove, 6-clamping device, 7-dovetail groove, 8-positioning block, 9-positioning bolt, 10-rack, 11-incomplete gear, 12-clamping rod, 13-clamping groove, 14-main shaft neck, 15-fixed plate, 16-positioning groove, 17-connecting rod journal, 18-cylinder, 19-rotating shaft, 20-slide groove. DETAILED DESCRIPTION

[0021] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0024] In the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0025] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0026] Example 1

[0027] like Figure 1-4 As shown, this embodiment provides a crankshaft deweighting hole positioning tool, including a processing table 1 and a positioning device 2, wherein a first support seat 3 and a second support seat 4 are respectively provided at both ends of the processing table 1, and a clamping device 6 is provided on the first support seat 3 and the second support seat 4; the clamping device 6 includes a rack 10 slidably mounted on the first support seat 3 or the second support seat 4, an incomplete gear 11 meshing with the rack 10, and a clamping member mounted on the incomplete gear 11, and the clamping member is used to clamp the main shaft neck 14; the positioning device 2 includes a positioning block 8 mounted on the processing table 1 and a positioning bolt 9 threadedly connected to the positioning block 8, a positioning groove 16 is provided on the positioning block 8, and one end of the positioning bolt 9 located in the positioning groove 16 is in rigid contact with the connecting rod journal 17.

[0028] The first support seat 3 and the second support seat 4 are used to support both ends of the crankshaft, specifically the main journal 14 of the crankshaft. The clamping device 6 clamps the main journal 14, specifically by moving the rack 10 to rotate the incomplete gear 11. The incomplete gear 11 rotates clockwise or counterclockwise, allowing the clamping member to move away from or close to the main journal 14, thereby achieving clamping and fixing of the main journal 14. The crankshaft connecting rod journal 17 is circumferentially positioned and fixed by the positioning device 2. When the connecting rod journal 17 is located in the positioning groove 16 on the positioning block 8, the positioning bolt 9 is rotated to press it against the outer surface of the connecting rod journal 17, thereby achieving fixation of the connecting rod journal 17. It can achieve circumferential fixation of different parts of the crankshaft, improve the stability of the crankshaft during processing, avoid the circumferential rotation of the crankshaft caused by insufficient clamping of the main journal 14, and reduce the scrap rate.

[0029] In this embodiment, both the first support seat 3 and the second support seat 4 are provided with a V-shaped groove 5. When in use, the main shaft journal 14 is located in the V-shaped groove 5. The V-shaped groove 5 can provide two fulcrums for the main shaft journal 14. The two fulcrums are the circumferential fixing points of the main shaft journal 14. The clamping device 6 is used to clamp the main shaft journal 14 from the top, thereby achieving multi-point fixation of the main shaft journal 14 and achieving a good fixing effect.

[0030] In other embodiments, a shim is provided on the wall of the V-shaped groove 5. The shim can prevent the crankshaft from wearing the V-shaped groove 5, thereby extending the service life of the first support seat 3 and the second support seat 4. Furthermore, when the shim is worn, the shim can be replaced.

[0031] In this embodiment, a fixing plate 15 is provided on both sides of the first support base 1 and the second support base 4, and the partial gear 11 is connected to the fixing plate 15 via a rotating shaft 19. The partial gear 11 is fixedly connected to the rotating shaft 19, and both ends of the rotating shaft 19 are rotatably connected to the fixing plate 15, thereby improving the stability of the partial gear 11 during rotation.

[0032] In this embodiment, a slot 20 is formed on the top of each of the first support seat 3 and the second support seat 4. The rack 10 is slidably mounted in the slot 20. A cylinder 18 is disposed in the slot 20, and the piston rod of the cylinder 18 is connected to the rack 10. During use, the piston rod of the cylinder 18 extends, driving the rack 10 toward the main journal 14. The rack 10 drives the incomplete gear 11 to rotate clockwise, which in turn drives the pressing member away from the main journal 14, releasing the crankshaft. The piston rod of the cylinder 18 shortens, driving the rack 10 away from the main journal 14. The rack 10 drives the incomplete gear 11 to rotate counterclockwise, which in turn drives the pressing member toward the main journal 14 until it is pressed against the outer circumference of the main journal 14. This secures the crankshaft and quickly achieves both fixation and release.

[0033] In some implementations of this embodiment, the clamping member includes a clamping rod 12, the clamping rod 12 includes a connecting portion and a clamping portion, the connecting portion is connected to the incomplete gear 11, and a clamping groove 13 is provided at the bottom end of the clamping portion, and the clamping groove 13 is in an inverted V shape or an arc shape.

[0034] In this embodiment, the positioning groove 16 is U-shaped, with one side of the positioning groove 16 being curved. The other side of the positioning groove 16 defines a screw hole, into which the positioning bolt 9 is installed. The width of the positioning groove 16 is greater than or equal to the diameter of the connecting rod journal 17. The tightening of the positioning bolt 9 ensures circumferential positioning of the connecting rod journal 17.

[0035] In this embodiment, the processing table 1 is provided with a plurality of dovetail grooves 7, and the first support seat 3, the second support seat 4, and the positioning block 8 are all slidably mounted on the dovetail grooves 7. This allows the positions of the first support seat 3, the second support seat 4, and the positioning block 8 on the processing table 1 to be adjusted, and can be adapted to the positioning and fixation of different crankshafts.

[0036] The working principle of a crankshaft deweighting hole positioning tool is as follows: the connecting rod journal 17 is placed in the positioning groove 16, and the two ends of the crankshaft are respectively placed in the V-groove 5 of the first support seat 3 and the V-groove 5 of the second support seat 4. The positions of the first support seat 3 and the second support seat 4 are adjusted so that the main journal 14 is located in the V-groove 8. The positioning bolt 9 is rotated so that the end located in the positioning groove 16 is pressed against the outer peripheral surface of the connecting rod journal 17. At the same time, the cylinder 18 is started, and the piston rod of the cylinder 18 drives the rack 10 to move, the incomplete gear 11 rotates, and the clamping rod 12 gradually approaches the main journal 14 until the clamping groove 13 of the clamping rod 12 is pressed against the outer peripheral surface of the main journal 14, completing the fixation of the crankshaft and processing.

[0037] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A crankshaft de-weighting hole positioning tool, characterized by: It includes a processing table and a positioning device, a first support seat and a second support seat are respectively provided at both ends of the processing table, and a clamping device is provided on the first support seat and the second support seat; the clamping device includes a rack slidably mounted on the first support seat or the second support seat, an incomplete gear meshing with the rack, and a clamping piece mounted on the incomplete gear, and the clamping piece is used to clamp the main shaft neck; the positioning device includes a positioning block mounted on the processing table and a positioning bolt threadedly connected to the positioning block, a positioning groove is provided on the positioning block, and one end of the positioning bolt located in the positioning groove is in rigid contact with the connecting rod journal.

2. The crankshaft deweighting hole positioning tool according to claim 1, characterized in that: The first support seat and the second support seat are both provided with a V-shaped groove.

3. The crankshaft deweighting hole positioning tool according to claim 1, characterized in that: A fixing plate is provided on both sides of the first supporting seat and the second supporting seat, and the incomplete gear is connected to the fixing plate via a rotating shaft.

4. The crankshaft deweighting hole positioning tool according to claim 1, characterized in that: The tops of the first support seat and the second support seat are both provided with a sliding groove, and the rack is slidably installed in the sliding groove. A cylinder is provided in the sliding groove, and the piston rod of the cylinder is connected to the rack.

5. The crankshaft deweighting hole positioning tool according to claim 1, characterized in that: The pressing member includes a pressing rod, which includes a connecting portion and a pressing portion. The connecting portion is connected to the incomplete gear. A pressing groove is provided at the bottom end of the pressing portion, and the pressing groove is in an inverted V shape or an arc shape.

6. The crankshaft deweighting hole positioning tool according to claim 1, characterized in that: The positioning groove is U-shaped, one side of the positioning groove is a curved surface, and the other side of the positioning groove is provided with a screw hole, and the positioning bolt is installed in the screw hole.

7. The crankshaft deweighting hole positioning tool according to claim 1, characterized in that: The processing table is provided with a plurality of dovetail grooves, and the first supporting seat, the second supporting seat and the positioning block are all slidably mounted on the dovetail grooves.

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