Tool for measuring taper of crankshaft

Abstract

The utility model discloses a tool for measuring the taper of a crankshaft, which comprises a bottom plate and a V-shaped block connected with the bottom plate, and further comprises a gauge stand connected with the bottom plate, and the gauge stand and the V-shaped block are both matched with mounting positioning grooves arranged on the top surface of the bottom plate. The bottom end of the V-shaped block or the bottom end of the gauge stand is matched with the corresponding mounting positioning groove and then is fixedly connected with the bottom plate through a locking piece; compared with the prior art, the utility model mainly comprises the bottom plate, the V-shaped block and the gauge stand, and the V-shaped block and the gauge stand are fixedly connected with the bottom plate through the locking piece after the bottoms of the V-shaped block and the gauge stand are positioned through the matched installation positioning grooves, so that the connection stability of the V-shaped block and the gauge stand on the bottom plate is improved; the precision of crankshaft taper measurement is improved, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of detection tooling structures, in particular to a tooling used for measuring crankshaft taper. Background Art

[0002] The crankshaft is the most important part of the engine. It bears the force from the connecting rod and converts it into torque, which is output through the crankshaft and drives other accessories on the engine. The crankshaft is subjected to the combined effects of the centrifugal force of the rotating mass, the periodically changing gas inertia force and the reciprocating inertia force, which makes the crankshaft subject to bending and torsion loads. Therefore, the crankshaft is required to have sufficient strength and rigidity, and the journal surface must be wear-resistant, work evenly and have good balance.

[0003] After the production and processing of the crankshaft is completed, it is necessary to detect the taper of the main journal of the crankshaft for later assembly. A crankshaft main journal taper detection device is disclosed in the patent document with application number CN202023176161.6, including a detection table, on which a V-shaped support block for supporting the two main journals of the crankshaft is fixedly installed, and a positioning mechanism for centering the crankshaft is also installed on the detection table. Two detection cylinders are installed on the detection table, and the detection cylinders are located on the outside of the V-shaped support block. The piston rod of the detection cylinder is fixedly installed with a support block through a mounting plate, and a column is fixedly installed on the support block, and a laser ranging sensor is fixedly installed on the upper end of the column.

[0004] The V-shaped support blocks in the above-mentioned taper detection device are attached to the upper surface of the detection table and fixedly connected by screws, and the connection stability is relatively poor. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the present utility model is to provide a tool for measuring crankshaft taper, so as to solve the problem in the prior art that V-shaped support blocks are attached to the upper surface of the inspection table and fixedly connected by screws, and their connection stability is relatively poor.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical solution: a tool for measuring crankshaft taper, including a base plate and a V-shaped block connected thereto, and also including a table frame connected to the base plate, wherein the table frame and the V-shaped block are both equipped with installation positioning grooves opened on the top surface of the base plate, and the bottom end of the V-shaped block or the bottom end of the table frame is adapted to the corresponding installation positioning groove and is fixedly connected to the base plate through a locking piece.

[0007] Compared with the prior art, the utility model has the following beneficial effects:

[0008] The tooling for crankshaft taper measurement mainly includes a base plate, a V-shaped block and a meter frame. The V-shaped block and the meter frame are positioned at their bottoms through matching installation positioning grooves and then fixedly connected to the base plate through locking pieces, thereby improving the connection stability of the V-shaped block and the meter frame on the base plate, which is beneficial to improving the accuracy of crankshaft taper measurement and increasing service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the structure of an embodiment of the utility model;

[0010] Figure 2 for Figure 1 A front view of

[0011] Figure 3 for Figure 1 A cross-sectional view of the midsole plate;

[0012] Figure 4 for Figure 1 Schematic diagram of the structure of the V-shaped block;

[0013] Figure 5 This is a schematic diagram of the connection between the reinforcement assembly and the V-shaped block in another embodiment of the utility model;

[0014] Figure 6 for Figure 5 A cross-sectional view of the mounting block;

[0015] Figure 7 for Figure 5 Schematic diagram of the structure of the middle locking cylinder.

[0016] The figure marks in the drawings of the specification include: base plate 1, V-shaped block 2, table frame 3, installation positioning groove 4, movable notch 5, reinforcement component 6, mounting rod 61, mounting block 62, pressing block 63, locking cylinder 64, driving handle 65, active bevel gear 66, driven bevel gear 67, and adjusting screw 68. DETAILED DESCRIPTION

[0017] The utility model is further described in detail below through specific implementation methods:

[0018] like Figure 1 , Figure 2 as well as Figure 3 As shown, an embodiment of the utility model proposes a tool for measuring crankshaft taper, including a base plate 1 and a V-shaped block 2 connected thereto, and also includes a table frame 3 connected to the base plate 1, wherein the table frame 3 and the V-shaped block 2 are both equipped with mounting positioning grooves 4 opened on the top surface of the base plate 1, and the bottom end of the V-shaped block 2 or the bottom end of the table frame 3 is adapted to the corresponding mounting positioning groove 4 and then fixedly connected to the base plate 1 through a locking member.

[0019] In this embodiment:

[0020] There are two V-shaped blocks 2 and two meter racks 3 , and the two V-shaped blocks 2 are located between the two meter racks 3 . The two V-shaped blocks 2 and the two meter racks 3 are arranged at intervals along the length direction of the bottom plate 1 .

[0021] When in use, the crankshaft is mounted on two V-shaped blocks 2 for positioning, and then a dial indicator is installed on two meter stands 3. The taper of the crankshaft is detected by the cooperation of the two dial indicators, which is convenient and quick.

[0022] Among them, the locking member can be at least two screws connected between the bottom end of the V-shaped block 2 or the bottom end of the watch frame 3 and the base plate 1. In this embodiment, the number of screws connecting each V-shaped block 2 or watch frame 3 and the base plate 1 is two, which can meet the requirements of connection stability.

[0023] In order to understand the present solution, the structure of the meter frame 3 and the V-shaped block 2 in the present solution is further optimized below.

[0024] like Figure 4 As shown, according to another embodiment of the utility model, a tool for measuring crankshaft taper, wherein the V-shaped block 2 includes a bottom side portion, the bottom end of the bottom side portion is adapted to the corresponding installation positioning groove 4 and the bottom side portion is I-shaped, and a V-shaped positioning opening is formed at the top of the bottom side portion.

[0025] Here, the bottom side is designed to be I-shaped to have sufficient structural strength, and its bottom end is adapted to the corresponding installation positioning groove 4 to position the connection of the V-shaped block 2, which is conducive to the rapid assembly of the screws on the one hand, and improves the stability of the V-shaped block 2 after installation on the other hand. Secondly, the formation of the V-shaped positioning hole can stably mount the crankshaft thereon, and can also stably position crankshafts of different thicknesses within a certain range, so as to efficiently complete the taper measurement of the crankshaft.

[0026] Among them, the included angle of the V-shaped positioning opening is 85°-95°, specifically can be 85°, 90° or 95°, etc. In this embodiment, the included angle of the V-shaped positioning opening is specifically 90°, so that the opening angle of the V-shaped positioning opening is more moderate to meet the use requirements.

[0027] Based on the above scheme:

[0028] The bottom of the V-shaped positioning opening is recessed toward the bottom side of the bottom side portion to form an active notch 5. When the crankshaft is clamped in the V-shaped positioning opening, it is convenient to insert a tool in the active notch 5 to lift the crankshaft upward, so that the crankshaft can be removed from the V-shaped positioning opening.

[0029] like Figure 1As shown, according to another embodiment of the utility model, a tool for measuring crankshaft taper, wherein the table frame 3 is composed of multiple sections with successively decreasing cross-sections connected from its bottom end to its top end, and a mounting portion for mounting a dial indicator is formed on a section located at the top end of the table frame 3.

[0030] In this embodiment:

[0031] The meter frame 3 is composed of three sections with successively decreasing cross-sections from the bottom to the top, so that its structure is compact and has sufficient structural strength; a horizontally arranged insertion hole is formed on the mounting portion, and a locking hole connected to the insertion hole is opened on the top of the mounting portion. The detection rod of the dial indicator passes through the insertion hole and contacts one end of the crankshaft for detection, and a bolt that abuts against the detection rod of the dial indicator is connected in the locking hole for locking and fixing.

[0032] In order to further improve the stability of the crankshaft during the measurement process, such as Figure 5 and Figure 6 As shown, according to another embodiment of the utility model, in the tool for measuring crankshaft taper, a reinforcing component 6 for positioning and fixing the crankshaft is arranged on the top of the V-shaped block 2.

[0033] After the crankshaft is mounted on the two V-shaped blocks 2, the crankshaft is further positioned and fixed by the reinforcement assembly 6 on each V-shaped block 2, thereby improving the stability of the crankshaft during the measurement process.

[0034] Based on the above scheme:

[0035] The reinforcement assembly 6 includes a mounting rod 61 and a pressing structure; wherein, there are two mounting rods 61 connected to both sides of the top of the V-shaped block 2, and the two mounting rods 61 are arranged in the vertical direction; the pressing structure is slidably connected between the two mounting rods 61 in the vertical direction to press and fix the crankshaft.

[0036] In this embodiment, the two mounting rods 61 are connected to the V-shaped block 2 by threaded connection, so as to facilitate the connection or separation between the mounting rods 61 and the V-shaped block 2.

[0037] When in use, after the crankshaft is mounted on the two V-shaped blocks 2, a pressing structure is installed between the two mounting rods 61 on each V-shaped block 2 to press and fix the crankshaft, so as to improve the stability of the crankshaft during the measurement process and to improve the measurement accuracy of the crankshaft.

[0038] Among them, the pressing structure includes a mounting block 62, a pressing block 63 and an adjustable locking portion. Both ends of the mounting block 62 are provided with mounting holes arranged in a vertical direction, and two mounting rods 61 pass through the two mounting holes in a one-to-one correspondence; the pressing block 63 is located below the mounting block 62 and above the mounting position of the V-shaped block 2, and the pressing block 63 is connected to the mounting block 62 through a plurality of elastic connecting parts; the adjustable locking portion is connected between the mounting block 62 and the two mounting rods 61, and is used to adjust the locking state between the mounting block 62 and the two mounting rods 61.

[0039] When in use, after the crankshaft is mounted on the two V-shaped blocks 2, the two mounting rods 61 on each V-shaped block 2 are inserted into the mounting holes on the matching mounting block 62; then the mounting block 62 is moved downward to make the pressing block 63 contact the crankshaft, and the elastic connectors are deformed and contracted until the pressing block 63 applies enough force to the crankshaft, and the mounting block 62 and the two mounting rods 61 are locked and fixed through the adjustable locking part, and the pressing block 63 keeps applying force to the crankshaft to make the crankshaft stably pressed, and then measurement can be performed. After the measurement is completed, the locking and fixing between the mounting block 62 and the two mounting rods 61 is released through the adjustable locking part, and the mounting block 62 can be moved upward to disconnect from the two mounting blocks 62, and then the crankshaft can be removed from the two V-shaped blocks 2. Among them, the elastic connector can be a spring.

[0040] Furthermore, a mounting cavity connected between the two mounting holes is provided in the mounting block 62, and the adjustable locking part includes a locking cylinder 64 and an adjustment unit, wherein the locking cylinders 64 are two and are both slidably arranged in the mounting cavity, and the two locking cylinders 64 are matched with the two mounting rods 61 in a one-to-one manner; the adjustment unit is arranged in the mounting cavity and connected to the two locking cylinders 64, and is used to drive the two locking cylinders 64 to move toward or away from each other; the adjustment unit includes a driving handle 65 that is passed through the outside of the mounting block 62 for adjustment.

[0041] In this embodiment, the adjustment unit also includes a driving bevel gear 66 that is rotatably arranged in the installation cavity and connected to the driving handle 65. The driving bevel gear 66 is meshed with two driven bevel gears 67. The two driven bevel gears 67 are connected to an adjusting screw 68. One end of the two adjusting screws 68 is threadedly connected to the two locking cylinders 64 in a one-to-one correspondence; and the two locking cylinders 64 are in a polygonal column shape, such as a quadrangular column shape, and the locking cylinders 64 are adapted to slide in the installation cavity; the driving handle 65 is convenient for the user to hold to rotate the driving bevel gear 66, and the driving bevel gear 66 drives the two driven bevel gears 67, the two driven bevel gears 67 respectively drive the two adjusting screws 68 to rotate, and cooperate with the shape design of the locking cylinder 64 to make the two locking cylinders 64 move toward or away from each other in the installation cavity; when the two locking cylinders 64 move away from each other and abut against the two installation rods 61 one by one, the locking and fixing between the installation block 62 and the two installation rods 61 is completed; when the two locking cylinders 64 move toward each other and are disengaged from the abutment with the two installation rods 61 one by one, the locking and fixing between the installation block 62 and the two installation rods 61 is released, and the installation block 62 can be moved relative to the two installation rods 61.

[0042] Since the mounting rod 61 is cylindrical, the separated ends of the two locking cylinders 64 are formed with arc surfaces (such as Figure 7 ), thereby increasing the contact surface between the locking cylinder 64 and the mounting rod 61, which is beneficial to improving the locking ability.

[0043] When using:

[0044] The crankshaft is mounted between two V-shaped blocks 2, and then a mounting block 62 is installed on each V-shaped block 2. Then the mounting block 62 is moved to make the pressing block 63 abut against the crankshaft, and then the driving handle 65 is rotated to make the two locking cylinders 64 and the two mounting rods 61 abut against each other one by one to lock them, and then the taper of the crankshaft is measured by the dial indicators installed on the two meter frames 3.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A tool for measuring crankshaft taper, comprising a base plate and a V-shaped block connected thereto, characterized in that: It also includes a meter frame connected to the base plate, wherein the meter frame and the V-shaped block are both equipped with installation positioning grooves opened on the top surface of the base plate, and the bottom end of the V-shaped block or the bottom end of the meter frame is adapted to the corresponding installation positioning groove and fixedly connected to the base plate through a locking piece.

2. A tool for measuring crankshaft taper according to claim 1, characterized in that: There are two V-shaped blocks and two meter frames, the two V-shaped blocks are located between the two meter frames, and the two V-shaped blocks and the two meter frames are arranged at intervals along the length direction of the bottom plate.

3. A tool for measuring crankshaft taper according to claim 1 or 2, characterized in that: The V-shaped block comprises: The bottom side portion, the bottom end of the bottom side portion is adapted to the corresponding installation positioning groove and the bottom side portion is in an I-shape, and a V-shaped positioning opening is formed at the top of the bottom side portion.

4. A tool for measuring crankshaft taper according to claim 3, characterized in that: The included angle of the V-shaped positioning opening is 85°-95°.

5. The tool for measuring crankshaft taper according to claim 3, characterized in that: The bottom of the V-shaped positioning opening is recessed toward the bottom side of the bottom side portion to form a movable notch.

6. A tool for measuring crankshaft taper according to claim 1 or 2, characterized in that: The meter frame is formed by connecting a plurality of sections with successively decreasing cross sections from the bottom end to the top end, and a mounting portion for mounting a dial indicator is formed on a section at the top end of the meter frame.

7. A tool for measuring crankshaft taper according to claim 1 or 2, characterized in that: A reinforcement component for positioning and fixing the crankshaft is arranged on the top of the V-shaped block.

8. A tool for crankshaft taper measurement according to claim 7, characterized in that: The reinforcement component comprises: There are two mounting rods connected to both sides of the top of the V-shaped block, and both mounting rods are arranged in the vertical direction; The pressing structure is slidably connected between the two mounting rods in a vertical direction to press and fix the crankshaft.

9. A tool for measuring crankshaft taper according to claim 8, characterized in that: The pressing structure comprises: A mounting block, wherein both ends of the mounting block are provided with mounting holes arranged in a vertical direction, and two mounting rods pass through the two mounting holes in a one-to-one correspondence; A pressing block, the pressing block is located below the mounting block and above the mounting position of the V-shaped block, and the pressing block is connected to the mounting block via a plurality of elastic connectors; The adjustable locking portion is connected between the mounting block and the two mounting rods and is used to adjust the locking state between the mounting block and the two mounting rods.

10. A tool for measuring crankshaft taper according to claim 9, characterized in that: The mounting block is provided with a mounting cavity communicating between the two mounting holes, and the adjustable locking portion comprises: There are two locking cylinders, both of which are slidably arranged in the installation cavity, and the two locking cylinders are matched with the two installation rods in a one-to-one correspondence; The adjusting unit is arranged in the installation cavity and connected with the two locking cylinders, and is used to drive the two locking cylinders to move toward or away from each other; the adjusting unit includes a driving handle that is inserted outside the installation block for adjustment.

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