Hole site machining clamp for left box body of engine

Abstract

The utility model discloses an engine left box body hole site machining clamp which comprises a base plate, the base plate is provided with a positioning device, a pressing device and a mistake proofing device, the positioning device comprises at least two positioning pins, the pressing device comprises a plurality of supporting pins and pressing blocks which correspond to the supporting pins and can ascend and descend in a rotating mode or an overturning mode, and the mistake proofing device is arranged on the base plate. The mistake proofing device comprises a front limiting block, a left limiting block and a right limiting block, the front limiting block, the left limiting block and the right limiting block are used for being matched with the outer contour of the left box body for limiting, and a containing space is formed between the front limiting block and the right limiting block; the containing space is used for containing the part, used for being connected with an engine cylinder body, of the left box body. According to the hole site machining clamp for the left box body of the engine, the machining precision of the hole site in the left box body can be improved, and the high-precision requirement is met.

Description

Technical Field

[0001] The utility model relates to a tool for machining an engine case, in particular to a fixture for machining holes of a left case of an engine. Background Art

[0002] A motorcycle engine has a housing, which is divided into a left housing and a right housing. The left housing and the right housing cooperate to form a cavity for accommodating a crankshaft and a connecting rod.

[0003] At the same time, the left box and the right box are both cast from aluminum alloy, which can reduce the workload of machining.

[0004] If necessary, the two surfaces of the left box body and the right box body that are in contact with each other and the two surfaces that are separated from each other are milled so that the two surfaces of the left box body and the right box body that are in contact with each other and the two surfaces that are separated from each other remain flat, so as to set the sealing gasket, thereby maintaining the sealing of the engine and avoiding leakage.

[0005] Furthermore, holes need to be processed on the left case and the right case to meet the requirements of engine assembly.

[0006] To avoid incorrect installation, the outer surface of the left box body faces upward and the inner surface faces downward on the fixture, so that the operator can confirm it by visually observing the outer surface of the left box body.

[0007] However, the machining accuracy of the holes on the left box is low and cannot meet the high-precision requirements. Utility Model Content

[0008] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a hole processing fixture for the left case of an engine, which can improve the processing accuracy of the holes on the left case and meet high-precision requirements.

[0009] According to an embodiment of the utility model, a fixture for processing holes in the left case of an engine comprises a base plate, wherein the base plate is provided with a positioning device, a clamping device and an anti-error device, wherein the positioning device comprises at least two positioning pins, the clamping device comprises a plurality of supporting pins, and a pressure block corresponding to the supporting pins that can be rotatably lifted or flipped and lifted, and the anti-error device comprises a front limit block, a left limit block and a right limit block, wherein the front limit block, the left limit block and the right limit block are used to match the outer contour of the left case to limit the position, and an accommodating space is formed between the front limit block and the right limit block, and the accommodating space is used to accommodate the part of the left case used to connect to the engine cylinder block.

[0010] According to an engine left case hole processing fixture of an embodiment of the utility model, in the front-to-back direction, the right limit block is farther away from the front limit block than the left limit block, and in the left-to-right direction, the right limit block is farther away from the front limit block than the left limit block.

[0011] According to an engine left case hole processing fixture of an embodiment of the utility model, one of the plurality of pressure blocks is a rear pressure block, the rear pressure block is connected to a cross arm, the cross arm is connected to a rear cylinder, and the rear cylinder is a rotary lifting cylinder.

[0012] According to an engine left case hole processing fixture of an embodiment of the utility model, the clamping device includes a rear support pin corresponding to the rear pressure block, and the positioning device includes a rear positioning pin, and the rear positioning pin is arranged close to the rear support pin.

[0013] According to an engine left case hole processing fixture of an embodiment of the utility model, one of the plurality of pressure blocks is a front left pressure block, the front left pressure block is located between the left limit block and the front limit block, the front left pressure block is connected to a four-bar structure, the four-bar structure is driven by a cylinder, and the front left pressure block can be flipped and pressed against the inner surface of the left case.

[0014] According to an engine left case hole processing fixture of an embodiment of the utility model, one of the several pressure blocks is a rear right pressure block, the rear right pressure block is located between the right limit block and the front limit block and is arranged close to the right limit block, the rear right pressure block is connected to a four-bar structure, the four-bar structure is driven by a cylinder, and the rear right pressure block can be flipped and pressed against the inner surface of the left case.

[0015] According to an engine left case hole processing fixture of an embodiment of the utility model, the clamping device includes a rear right support pin corresponding to the rear right pressure block, and the positioning device includes a rear right positioning pin, and the rear right positioning pin is arranged close to the rear right support pin.

[0016] According to an engine left case hole processing fixture of an embodiment of the utility model, the clamping device also includes a separately arranged rear left support pin, the rear left support pin is located on the rear side of the left limit block, and the rear left support pin is located on the left side of the right limit block.

[0017] According to an embodiment of the utility model, a left case hole processing fixture of an engine has at least the following beneficial effects:

[0018] The utility model provides a positioning device, a clamping device and an anti-error device, so that the position of the left box body is accurately determined by the positioning pin of the positioning device, and then the hole position to be processed is determined, which is convenient for processing. At the same time, multi-point support and clamping can be achieved by the support pin and the pressure block of the clamping device, which is convenient for up and down positioning, and fixes the left box body, reduces vibration, and helps to improve processing accuracy. At the same time, the left limit block, the right limit block and the front limit block of the anti-error device are used, and the distance between the right limit block and the front limit block is increased, and the inner surface of the left box body is also facing upward, and then the hole position of the left box body is close to the base plate, which improves the fixing reliability, reduces the vibration during processing, avoids relying on the strength of the left box body itself to ensure the processing accuracy, and then improves the processing accuracy to meet the high-precision requirements.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 This is a schematic diagram of the structure of a fixture for machining holes in the left case of an engine according to an embodiment of the utility model;

[0022] Figure 2 for Figure 1 A structural schematic diagram of a pressing method of a pressing device is shown.

[0023] Reference numerals:

[0024] 1-front limit block, 2-left limit block, 3-right limit block, 4-rear pressure block, 5-rear support pin, 6-rear positioning pin, 7-front left pressure block, 8-rear right pressure block, 9-rear right support pin, 10-rear right positioning pin, 11-rear left support pin. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, 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.

[0027] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of first and second, this is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation, connection and connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] A fixture for machining holes of a left case of an engine according to an embodiment of the utility model will be described below in conjunction with the accompanying drawings.

[0030] Reference Figure 1 The utility model aims to provide an embodiment of a hole processing fixture for the left case of an engine, thereby being able to improve the processing progress of the holes on the left case and meet high-precision requirements.

[0031] In this embodiment, the fixture includes a substrate, and the top and bottom surfaces of the substrate should be ground so that the top and bottom surfaces have high parallelism and flatness, reducing manufacturing errors and reducing the difficulty of subsequent installation and adjustment.

[0032] In some specific embodiments of the present invention, at least one side of the substrate can also be ground to facilitate marking during machining and avoid skewed installation of the fixture.

[0033] A positioning device, a pressing device and an anti-error device are arranged on the substrate.

[0034] Wherein, the positioning device includes at least two positioning pins, thereby utilizing two-point positioning to improve positioning accuracy.

[0035] In some specific embodiments of the present invention, a three-point positioning method can be used to overcome the wear of the positioning pin, but the damage to the hole on the left box body must be considered.

[0036] In some specific embodiments of the present invention, the positioning pin may include a pin seat and a tapered pin body, so that they can be installed as a whole, which is convenient for replacement and maintenance.

[0037] In some specific embodiments of the present invention, the tapered pin body can be elastically lifted and lowered relative to the pin seat, thereby compensating for the manufacturing deviation or processing deviation of the positioning hole on the left box body.

[0038] The clamping device comprises a plurality of supporting pins and pressing blocks corresponding to the supporting pins and capable of rotating and lifting or flipping and lifting.

[0039] In some specific embodiments of the utility model, a part of the pressing blocks can be rotated and lifted, and the other part of the pressing blocks can be flipped and lifted. Therefore, the need to press the inner surface of the left box body is met, and the obstruction in the upper and lower directions is reduced, making it convenient to take and put the left box body.

[0040] In some specific embodiments of the utility model, the pressing block can be driven by a cylinder, which reduces the power manufacturing cost and is easy to implement.

[0041] For the error prevention device, the error prevention device includes a front limit block 1, a left limit block 2 and a right limit block 3. The front limit block 1, the left limit block 2 and the right limit block 3 are used to match the outer contour of the left box body to limit the position. An accommodating space is formed between the front limit block 1 and the right limit block 3. The accommodating space is used to accommodate the part of the left box body used to connect to the engine cylinder block.

[0042] It is easy to understand that in this embodiment, a positioning device, a clamping device and an anti-error device are provided, so that the position of the left box body is accurately determined by the positioning pin of the positioning device, and then the hole position to be processed is determined to facilitate processing. At the same time, multi-point support and clamping can be achieved through the support pin and the pressure block of the clamping device, which is convenient for up and down positioning, and fixes the left box body to reduce vibration, which helps to improve processing accuracy. At the same time, through the left limit block 2, the right limit block 3 and the front limit block 1 of the anti-error device, and the distance between the right limit block 3 and the front limit block 1 is increased, the inner surface of the left box body is also facing upward, and then the hole position of the left box body is close to the substrate, which improves the fixing reliability, reduces the vibration during processing, avoids relying on the strength of the left box body itself to ensure the processing accuracy, and then improves the processing accuracy to meet high precision requirements.

[0043] In some specific embodiments of the present invention, the limit block can be made of plastic to reduce the probability of the limit block contacting the left box body and causing damage to the surface of the left box body.

[0044] In some specific embodiments of the present invention, the limiting block can be made to extend along the outer contour of the left box body in a concave-convex manner close to the side of the left box body to improve the error prevention capability.

[0045] In some specific embodiments of the present invention, a mounting column may be provided at the bottom of the limit block, thereby increasing the height of the limit block to meet the limit requirement and, at the same time, reducing the material used in the limit block and lowering the manufacturing cost.

[0046] In some specific embodiments of the present invention, in the front-to-back direction, the right limit block 3 is farther away from the front limit block 1 than the left limit block 2 , and in the left-to-right direction, the right limit block 3 is farther away from the front limit block 1 than the left limit block 2 .

[0047] It is easy to understand that, by improving the position of the right limit block 3, the protruding portion of the left box body for mounting the cylinder body is arranged along the diagonal position of the base plate, which makes rational use of space, has a compact structure, and does not need to increase the specifications of the base plate.

[0048] In some specific embodiments of the utility model, one of the plurality of pressing blocks can be a rear pressing block 4, the rear pressing block 4 is connected to a cross arm, the cross arm is connected to a rear cylinder, and the rear cylinder is a rotary lifting cylinder.

[0049] It is easy to understand that in this embodiment, by setting the rear pressing block 4 so that the rear pressing block 4 can be rotated and lifted, the height position of the rear pressing block 4 can be lowered, the obstruction in the front and rear directions can be reduced, and the left box can be easily taken in and out without affecting the disassembly and loading operations.

[0050] In some specific embodiments of the present invention, the pressing device may include a rear supporting pin 5 corresponding to the rear pressing block 4 , and the positioning device may include a rear positioning pin 6 , which is disposed close to the rear supporting pin 5 .

[0051] It is easy to understand that this embodiment arranges the rear support pin 5 and the rear positioning pin 6 close to each other. On the one hand, it is convenient to confirm whether the positioning is accurate. On the other hand, it makes the fastening position and the positioning position close to each other, reducing the influence of the clamping action on the positioning, thereby satisfying both the positioning requirement and the fixing requirement.

[0052] In some specific embodiments of the present invention, one of the plurality of pressure blocks can be the front left pressure block 7, which is located between the left limit block 2 and the front limit block 1. The front left pressure block 7 is connected to a four-bar structure, which is driven by a cylinder. The front left pressure block 7 can be flipped and pressed against the inner surface of the left box body.

[0053] It is easy to understand that in this embodiment, the front left pressure block 7 is set, and the front left pressure block 7 is turned over and pressed, thereby meeting the fixing requirements and avoiding increasing the horizontal occupied space without affecting the arrangement of the left limit block 2 and the right limit block 3.

[0054] For the form of the four-bar linkage, please refer to Figure 2 The cylinder pushes the pressure rod, and the pressure rod rotates around the connecting rod. At the same time, due to the rotating arrangement of the connecting rod, the cylinder push rod is prevented from tilting and wearing eccentrically, thereby extending the service life. Moreover, after being pressed, the pressure rod is not easy to translate, and the front left pressure block 7 can be firmly pressed and fixed.

[0055] In some specific embodiments of the present invention, one of the several pressure blocks can be the rear right pressure block 8, which is located between the right limit block 3 and the front limit block 1 and is arranged close to the right limit block 3. The rear right pressure block 8 is connected to a four-bar structure, which is driven by a cylinder. The rear right pressure block 8 can be flipped and pressed against the inner surface of the left box body.

[0056] It is easy to understand that, by providing the rear right pressing block 8, the present embodiment also facilitates three-point clamping and fixing of the left box body, thereby preventing the left box body from partially tilting up and affecting the fixation.

[0057] The four-bar structure of the right pressure block 8 after the drive can also refer to Figure 2 The scheme setting and structural scheme are the same to avoid increasing the manufacturing difficulty.

[0058] In some specific embodiments of the present invention, the clamping device may include a rear right supporting pin 9 corresponding to the rear right pressing block 8 , and the positioning device may include a rear right positioning pin 10 , which is arranged close to the rear right supporting pin 9 .

[0059] It is easy to understand that in this embodiment, by arranging the rear right positioning pin 10 close to the rear right supporting pin 9, another positioning point can be quickly fixed around when pressed, thereby reducing the possibility of inch movement of the left box body.

[0060] In some specific embodiments of the present invention, the clamping device may further include a separately provided rear left support pin 11 , which is located at the rear side of the left limit block 2 and the left side of the right limit block 3 .

[0061] It is easy to understand that, by providing the rear right support pin 9, this embodiment also realizes multi-point support, improves support stability, reduces local vibration during machining, and is beneficial to improving machining accuracy.

[0062] In the description of this specification, the description with reference to the terms "one embodiment, some embodiments, illustrative embodiments, examples, specific examples or some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0063] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A hole processing fixture for the left case of an engine, comprising a base plate, characterized in that: The base plate is provided with a positioning device, a clamping device and an anti-error device, wherein the positioning device includes at least two positioning pins, the clamping device includes a plurality of supporting pins, and a pressure block corresponding to the supporting pins that can be rotatably lifted or flipped and lifted, and the anti-error device includes a front limit block, a left limit block and a right limit block, the front limit block, the left limit block and the right limit block are used to match the outer contour of the left box body to limit the position, and an accommodating space is formed between the front limit block and the right limit block, and the accommodating space is used to accommodate the part of the left box body used to connect to the engine cylinder block.

2. The engine left case hole processing fixture according to claim 1, characterized in that: In the front-to-back direction, the right limit block is farther away from the front limit block than the left limit block, and in the left-to-right direction, the right limit block is farther away from the front limit block than the left limit block.

3. The engine left case hole processing fixture according to claim 1, characterized in that: One of the plurality of pressing blocks is a rear pressing block, the rear pressing block is connected with a cross arm, the cross arm is connected with a rear cylinder, and the rear cylinder is a rotary lifting cylinder.

4. The engine left case hole processing fixture according to claim 3, characterized in that: The pressing device includes a rear supporting pin corresponding to the rear pressing block, and the positioning device includes a rear positioning pin, which is arranged close to the rear supporting pin.

5. The engine left case hole processing fixture according to claim 1, characterized in that: One of the several pressure blocks is a front left pressure block, which is located between the left limit block and the front limit block. The front left pressure block is connected to a four-bar structure, which is driven by a cylinder. The front left pressure block can be flipped and pressed against the inner surface of the left box body.

6. The engine left case hole processing fixture according to claim 1, characterized in that: One of the several pressure blocks is a rear right pressure block, which is located between the right limit block and the front limit block and is arranged close to the right limit block. The rear right pressure block is connected to a four-bar structure, and the four-bar structure is driven by a cylinder. The rear right pressure block can be flipped and pressed against the inner surface of the left box body.

7. The engine left case hole processing fixture according to claim 6, characterized in that: The clamping device includes a rear right supporting pin corresponding to the rear right pressing block, and the positioning device includes a rear right positioning pin, which is arranged close to the rear right supporting pin.

8. The engine left case hole processing fixture according to claim 1, characterized in that: The clamping device also includes a separately arranged rear left support pin, wherein the rear left support pin is located at the rear side of the left limit block, and the rear left support pin is located at the left side of the right limit block.

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