A device for quickly detecting eccentricity

Abstract

The present invention discloses a device for quickly detecting eccentricity, comprising: a base, a lower fixing member for engaging with the lower center hole of a crank, an upper fixing member that can be raised and lowered and engaged with the upper center hole of the crank, a clamping device for clamping the crank rod, a floating pin for inserting into the pin hole of the crank, and a detection device for detecting the eccentricity of the crank. The detection end of the detection device abuts against the floating pin, the upper fixing member, the lower fixing member, and the floating pin are all vertically arranged on the base, and the detection device and the clamping device are both horizontally arranged on the base. By using the device for quickly detecting eccentricity provided by the present invention, the detection effect of the crank eccentricity detection device can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of crank detection, and more particularly to a device for quickly detecting eccentricity. Background Art

[0002] In the prior art, crank 04 plays a vital role in the motorcycle crankshaft, and the crank 04 has strict requirements on the eccentricity. If the eccentricity is out of tolerance, it will affect the compression ratio and affect the power of the engine. The schematic diagram of the commonly used crank eccentricity detection device is as follows: Figure 1 As shown, it mainly uses a parallel rod 01 to be inserted into the pin hole of the crank 2 through interference, and then uses the deflection measuring instrument 02 for detection. The specific implementation method is as follows:

[0003] First, use a hammer to knock the parallel rod 01 into the pin hole of the crank 04; then, place the center holes at both ends of the crank 04 on the two tops of the deflection gauge 02, rotate the crank 04 around the top, and use the micrometer 03 to detect the highest point of the parallel rod 01, then return the micrometer 03 to zero and use this part as a standard part; then, knock another parallel rod 01 of the same size into the pin hole of another crank 04, repeat the above operation, detect the eccentricity of the pin hole of this crank 04, and detect whether the eccentricity is qualified by comparison; finally, when the detection operation is completed, use a hammer to knock out the parallel rod 01, and repeat the above operation when the detection operation needs to be performed again.

[0004] However, existing crank eccentricity detection devices often require numerous standard components due to varying eccentricities and pinhole sizes, leading to management confusion. Furthermore, repeated disassembly and installation of parallel rods 01 can easily damage the balance bar, and the pinholes of crank 04 can also be damaged, posing a safety risk to crank 04.

[0005] In summary, how to improve the detection effect of the crank eccentricity detection device is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, an object of the present invention is to provide a device for quickly detecting eccentricity, which can effectively improve the detection effect of the crank eccentricity detection device.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A device for quickly detecting eccentricity, comprising: a base, a lower fixing member for engaging with a lower center hole of a crank, an upper fixing member movable and capable of being raised and lowered for engaging with an upper center hole of the crank, a clamping device for clamping a rod portion of the crank, a floating pin for inserting into a pin hole of the crank, and a detection device for detecting the eccentricity of the crank, wherein a detection end of the detection device abuts against the floating pin;

[0009] The upper fixing member, the lower fixing member and the floating pin are all vertically arranged on the base, and the detection device and the clamping device are both horizontally arranged on the base.

[0010] Preferably, the lower fixing member is a lower push rod fixed on the base, and the top of the lower push rod is provided with a lower tip for inserting into the lower tip hole.

[0011] Preferably, the upper fixing member includes a support seat vertically arranged on the base, the support seat is in an inverted L shape, the horizontal part of the support seat is provided with an upper push rod and a telescopic cylinder for driving the upper push rod to move up and down, the top of the upper push rod is connected to the telescopic cylinder, and the bottom of the upper push rod is provided with an upper tip for inserting into the upper tip hole.

[0012] Preferably, the clamping device includes a V-shaped block and a connector for clamping the rod portion, the connector is horizontally arranged on the vertical portion of the support seat, the connector is provided with a groove along the horizontal direction, the V-shaped block can move along the groove, and the V-shaped block is fixed to the connector by a locking member.

[0013] Preferably, the detection device includes a linear guide rail horizontally arranged on the base, a dial base arranged on the linear guide rail, and a dial indicator arranged on the dial base, and the detection end of the dial indicator is used to abut against the floating pin.

[0014] Preferably, a positioning body is slidably provided on the linear guide rail, the positioning body is provided with a receiving hole, the floating pin includes a vertical rod for inserting into the receiving hole and an insertion rod for inserting into the pin hole, and the vertical rod and the insertion rod are connected.

[0015] Preferably, the vertical rod and the accommodating hole are clearance-fitted, and a spring is sandwiched between the outer periphery of the vertical rod and the inner periphery of the accommodating hole.

[0016] Preferably, a nut is fixed to the bottom of the accommodating hole, and the bottom of the vertical rod and the nut are threadedly connected.

[0017] Preferably, the upper fixing member, the lower fixing member, the floating pin, the detection device and the clamping device are all detachably connected to the base.

[0018] When using the rapid eccentricity detection device provided by the present invention, the lower center hole of the crank and the lower fixing member can be clamped and fixed, and the crank rod can be clamped and fixed using a clamping device. The upper fixing member can then be lifted and lowered to a suitable position to ensure that the upper fixing member is clamped and fixed with the upper center hole of the crank. Afterwards, the floating pin can be inserted into the pin hole of the crank, and the eccentricity of the crank can be detected using a detection device. That is, the detection end of the detection device can be brought into contact with the floating pin to measure the distance between the pin hole and the lower center hole, so that the device can perform eccentricity detection on cranks of different sizes. In addition, since the upper fixing member, the lower fixing member, and the floating pin are all vertically arranged on the base, the device is also provided with a clamping device for fixing the crank rod, which can ensure that the above-mentioned clamping, fixing, and insertion detection operations are accurate to avoid damage to the crank.

[0019] In summary, the rapid eccentricity detection device provided by the present invention can effectively improve the detection effect of the crank eccentricity detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0021] Figure 1 It is a structural schematic diagram of a crank eccentricity detection device in the prior art;

[0022] Figure 2 Schematic diagram of the crank structure;

[0023] Figure 3 This is a schematic diagram of the use of the device for quickly detecting eccentricity provided by the present invention.

[0024] Figure 1 middle:

[0025] 01 is a parallel rod, 02 is a runout gauge, 03 is a dial indicator, and 04 is a crank;

[0026] Figure 2 and Figure 3 middle:

[0027] 1 is the base, 2 is the crank, 21 is the lower center hole, 22 is the upper center hole, 23 is the pin hole, 3 is the lower fixing part, 4 is the upper fixing part, 41 is the support seat, 42 is the upper push rod, 43 is the telescopic cylinder, 5 is the clamping device, 51 is the V-block, 52 is the connector, 53 is the locking part, 6 is the floating pin, 7 is the detection device, 71 is the linear guide rail, 72 is the base, 73 is the micrometer, 8 is the positioning body, 9 is the spring, 10 is the nut, and 11 is the bolt. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] The core of the present invention is to provide a device for quickly detecting eccentricity, which can effectively improve the detection effect of the crank eccentricity detection device.

[0030] Please refer to Figure 2 and Figure 3 ,in, Figure 2 Schematic diagram of the crank structure; Figure 3 This is a schematic diagram of the use of the device for quickly detecting eccentricity provided by the present invention.

[0031] This specific embodiment provides a device for quickly detecting eccentricity, including: a base 1, a lower fixing member 3 for engaging with the lower center hole 21 of the crank 2, an upper fixing member 4 that can be raised and lowered for engaging with the upper center hole 22 of the crank 2, a clamping device 5 for clamping the rod of the crank 2, a floating pin 6 for inserting into the pin hole 23 of the crank 2, and a detection device 7 for detecting the eccentricity of the crank 2, the detection end of the detection device 7 abuts against the floating pin 6; the upper fixing member 4, the lower fixing member 3 and the floating pin 6 are all vertically arranged on the base 1, and the detection device 7 and the clamping device 5 are both horizontally arranged on the base 1.

[0032] It should be noted that the device adopts a modular design, which realizes the universalization of eccentricity detection, makes the detection operation faster and more accurate, reduces the labor intensity of workers, and eliminates the quality risks of the crank 2.

[0033] During actual use, the shape, structure, size, material, position, etc. of the base 1, lower fixing part 3, upper fixing part 4, clamping device 5, floating pin 6 and detection device 7 can be determined according to actual conditions and actual needs.

[0034] When using the rapid eccentricity detection device provided by the present invention, the lower center hole 21 of the crank 2 and the lower fixing member 3 can be clamped and fixed, and the rod portion of the crank 2 can be clamped and fixed using the clamping device 5. The upper fixing member 4 is then lifted and lowered to a suitable position to ensure that the upper fixing member 4 is clamped and fixed with the upper center hole 22 of the crank 2. Thereafter, the floating pin 6 is inserted into the pin hole 23 of the crank 2, and the eccentricity of the crank 2 is detected using the detection device 7. That is, the detection end of the detection device 7 can be brought into contact with the floating pin 6 to measure the distance between the pin hole 23 and the lower center hole 21, so that the device can detect the eccentricity of cranks 2 of different sizes. In addition, since the upper fixing member 4, the lower fixing member 3 and the floating pin 6 are all vertically arranged on the base 1, the device is also provided with a clamping device 5 for fixing the rod portion of the crank 2, which can ensure that the above-mentioned clamping, fixing and insertion detection operations are accurate to avoid damage to the crank 2.

[0035] In summary, the device for quickly detecting eccentricity provided by the present invention can effectively improve the detection effect of the device for detecting eccentricity of the crank 2.

[0036] Based on the above embodiment, preferably, the lower fixing member 3 is a lower push rod fixed to the base 1, and the top of the lower push rod is provided with a lower tip for inserting into the lower center hole 21. The lower push rod can be arranged with an interference fit with the base 1, and the lower push rod can achieve preliminary fixation of the crank 2. Then, the clamping device 5 is used to clamp and fix the rod portion of the crank 2, and the upper fixing member 4 is used to fix the upper center hole 22 of the crank 2, so as to facilitate the eccentricity detection operation of the crank 2.

[0037] Preferably, the upper fixing member 4 includes a support seat 41 vertically arranged on the base 1, and the support seat 41 is in an inverted L shape. The horizontal part of the support seat 41 is provided with an upper push rod 42 and a telescopic cylinder 43 for driving the upper push rod 42 to move up and down. The top of the upper push rod 42 is connected to the telescopic cylinder 43, and the bottom of the upper push rod 42 is provided with an upper tip for inserting into the upper tip hole 22.

[0038] It should be noted that when the present device is testing cranks 2 of different sizes, after the crank 2 is fixed by the lower ejector rod and the clamping device 5, the telescopic cylinder 43 can be controlled to operate so that the upper ejector rod 42 moves up and down to ensure that the bottom of the upper ejector rod 42 is inserted into the upper top hole 22 of the crank 2. The upper top hole 22 and the lower top hole 21 of the crank 2 are coaxially arranged, and the upper ejector rod 42 is vertically engaged with the upper top hole 22, and the lower ejector rod is vertically engaged with the lower top hole 21. When the upper ejector rod 42 is moved up and down, it can ensure that the upper tip is accurately inserted into the upper top hole 22, and will not collide and damage the crank 2.

[0039] Preferably, the clamping device 5 includes a V-shaped block 51 for clamping the rod part and a connecting body 52. The connecting body 52 is horizontally arranged on the vertical part of the support seat 41. The connecting body 52 is provided with a groove in the horizontal direction. The V-shaped block 51 can move along the groove. The V-shaped block 51 is fixed to the connecting body 52 by a locking member 53.

[0040] It should be noted that when the present device is detecting cranks 2 of different sizes, after the crank 2 is initially fixed by the lower push rod, the V-block 51 can be controlled to move horizontally along the slot to ensure that the V-groove of the V-block 51 can clamp and fix the rods of cranks 2 of different diameters. When the V-block 51 moves to a suitable position, the locking piece 53 is used to fix the V-block 51 on the connector 52 to prevent the V-block 51 from continuing to move, thereby ensuring the fixing effect of the V-block 51 on the rod of the crank 2.

[0041] During actual use, the shape, structure, size, material, position, etc. of the lower push rod, support seat 41, upper push rod 42, telescopic cylinder 43, V-block 51 and connector 52 can be determined according to actual conditions and actual needs.

[0042] Based on the above embodiment, preferably, the detection device 7 includes a linear guide 71 horizontally mounted on the base 1, a dial gauge 72 mounted on the linear guide 71, and a dial gauge 73 mounted on the dial gauge 72. The detection end of the dial gauge 73 is configured to abut against the floating pin 6. When the crank 2 has different sizes, the position of the floating pin 6 inserted into the pin hole 23 of the crank 2 varies, thereby causing the detection end of the dial gauge 73 to be positioned differently, ultimately allowing eccentricity data for different cranks 2 to be obtained.

[0043] Preferably, a positioning body 8 is slidably provided on the linear guide rail 71 , the positioning body 8 is provided with a receiving hole, and the floating pin 6 includes a vertical rod for inserting into the receiving hole and an insertion rod for inserting into the pin hole 23 , and the vertical rod and the insertion rod are connected.

[0044] Preferably, the vertical rod and the receiving hole are clearance-fitted, and a spring 9 is sandwiched between the outer periphery of the vertical rod and the inner periphery of the receiving hole.

[0045] It should be noted that the floating pin 6 can float up and down in the positioning body 8 through the spring 9. The floating pin 6 can effectively fit with the cranks 2 of different heights. The positioning body 8 is installed on the linear guide rail 71. While the floating pin 6 moves up and down, it can move left and right on the linear guide rail 71 as the eccentricity of the crank 2 changes. During the left and right movement of the positioning body 8, the detection end of the micrometer 73 can be pushed to move, so that the micrometer 73 displays different values, and different eccentricities can be detected.

[0046] Preferably, a nut 10 is fixed to the bottom of the accommodating hole, and a threaded connection is formed between the bottom of the vertical rod and the nut 10 . This arrangement can effectively prevent the floating pin 6 from falling off the positioning body 8 .

[0047] Preferably, the upper fixing member 4, the lower fixing member 3, the floating pin 6, the detection device 7, and the clamping device 5 are all detachably connected to the base 1. For example, the upper fixing member 4, the lower fixing member 3, the floating pin 6, the detection device 7, and the clamping device 5 can be fixed to the base 1 using bolts 11.

[0048] During actual use, the shape, structure, size, material, position, etc. of the linear guide 71, the base 72, the micrometer 73, the positioning body 8 and the spring 9 can be determined according to actual conditions and actual needs.

[0049] In order to further illustrate the use of the device for quickly detecting eccentricity provided by the present invention, an example is given below.

[0050] When using the rapid eccentricity detection device provided by the present invention, the lower center hole 21 of the crank 2 can be placed on the lower push rod, and the floating pin 6 can be pushed into the pin hole 23 of the crank 2. Then, the V-block 51 can be used to clamp and fix the rod portion of the crank 2 to prevent the crank 2 from tilting, which is also beneficial to ensure that the lower push rod is coaxial with the upper push rod 42. Afterwards, the telescopic cylinder 43 can be started to drive the upper push rod 42 to move down and push into the upper center hole 22. During this pushing process, the floating pin 6 will float up and down along the accommodating hole under the action of the spring 9 to effectively fit the cranks 2 of different heights.

[0051] Since the positioning body 8 is slidably arranged on the linear guide rail 71, when the floating pin 6 moves up and down, the floating pin 6 can move left and right on the linear guide rail 71 as the eccentricity of the crank 2 changes. When the floating pin 6 moves left and right, it will push the detection end of the micrometer 73 to move, so that the micrometer 73 displays different values, and different eccentricities can be detected.

[0052] Furthermore, it should be noted that the modular design of the present device allows for universal detection of the eccentricity of the crank 2. A single set of the present device can be used to detect cranks 2 of different types and sizes, facilitating management and reducing operator labor. Furthermore, the various structural arrangements of the present device ensure rapid and accurate detection without causing scratches or damage to the crank 2 during the detection process, thereby ensuring the quality of the detection of the crank 2.

[0053] In addition, it should be noted that the orientations or positional relationships indicated by "up and down", "horizontal", "vertical", etc. in this application are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the purpose of simplifying the description and facilitating understanding, and do not indicate or imply 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 a limitation on the present invention.

[0054] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other. Any combination of all the embodiments provided by the present invention is within the scope of protection of this invention and will not be described in detail here.

[0055] The above is a detailed introduction to the rapid eccentricity detection device provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A device for quickly detecting eccentricity, characterized in that: include: A base (1), a lower fixing member (3) for engaging with a lower center hole (21) of a crank (2), an upper fixing member (4) for engaging with an upper center hole (22) of the crank (2) and capable of being lifted and lowered, a clamping device (5) for clamping the rod of the crank (2), a floating pin (6) for inserting into a pin hole (23) of the crank (2), and a detection device (7) for detecting the eccentricity of the crank (2), wherein a detection end of the detection device (7) abuts against the floating pin (6); The upper fixing member (4), the lower fixing member (3) and the floating pin (6) are all vertically arranged on the base (1), and the detection device (7) and the clamping device (5) are both horizontally arranged on the base (1); the detection device (7) includes a linear guide rail (71) horizontally arranged on the base (1), a dial base (72) arranged on the linear guide rail (71) and a micrometer (73) arranged on the dial base (72), and the detection end of the micrometer (73) is used to abut against the floating pin (6); a positioning body (8) is slidably provided on the linear guide rail (71), and the positioning body (8) is provided on the linear guide rail (71). The positioning body (8) is provided with a receiving hole, and the floating pin (6) includes a vertical rod for inserting into the receiving hole and an insertion rod for inserting into the pin hole (23), and the vertical rod and the insertion rod are connected; the vertical rod and the receiving hole are clearance-matched, and a spring (9) is sandwiched between the outer periphery of the vertical rod and the inner periphery of the receiving hole; the floating pin (6) moves up and down and moves left and right on the linear guide rail (71) as the eccentricity of the crank (2) changes, and the positioning body (8) pushes the detection end of the micrometer (73) to move during the left and right movement to detect different eccentricities.

2. The device for quickly detecting eccentricity according to claim 1, characterized in that: The lower fixing member (3) is a lower push rod fixed on the base (1), and the top of the lower push rod is provided with a lower tip for inserting into the lower tip hole (21).

3. The device for quickly detecting eccentricity according to claim 1, characterized in that: The upper fixing member (4) includes a support seat (41) vertically arranged on the base (1), the support seat (41) is in an inverted L-shape, and the horizontal portion of the support seat (41) is provided with an upper push rod (42) and a telescopic cylinder (43) for driving the upper push rod (42) to move up and down, the top of the upper push rod (42) is connected to the telescopic cylinder (43), and the bottom of the upper push rod (42) is provided with an upper tip for inserting into the upper tip hole (22).

4. The device for quickly detecting eccentricity according to claim 3, characterized in that: The clamping device (5) comprises a V-shaped block (51) for clamping the rod portion and a connecting body (52), wherein the connecting body (52) is horizontally arranged on the vertical portion of the support seat (41), and the connecting body (52) is provided with a slot in the horizontal direction, and the V-shaped block (51) can move along the slot, and the V-shaped block (51) is fixed to the connecting body (52) by a locking member (53).

5. The device for quickly detecting eccentricity according to any one of claims 1 to 4, characterized in that: A nut (10) is fixedly provided at the bottom of the receiving hole, and a threaded connection is formed between the bottom of the vertical rod and the nut (10).

6. The device for quickly detecting eccentricity according to any one of claims 1 to 4, characterized in that: The upper fixing member (4), the lower fixing member (3), the floating pin (6), the detection device (7) and the clamping device (5) are all detachably connected to the base (1).

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