Adjustable crankshaft grinding connection tool
By designing an adjustable crankshaft grinding connection tooling, including a front-end flange universal joint and a rear-end flange universal joint, the problem of reduced crankshaft journal accuracy and the inability to grind the steps at both ends is solved, achieving higher machining precision and lower production costs.
Patent Information
- Application Number
- CN202421152389.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-24
- Publication Date
- 2025-01-21
- Estimated Expiration
- 2034-05-24
AI Technical Summary
During the processing process, the existing crankshaft grinding tooling leads to a decrease in the crankshaft journal accuracy and large deviations in the jump value, which cannot meet the customer's high-quality requirements. The outer circle and end face of the two end steps cannot be ground, which extends the production cycle.
An adjustable crankshaft grinding connection tool is designed, including a front-end flange universal joint and a rear-end flange universal joint, which replaces the traditional fixed grinding crankshaft at both ends and avoids problems caused by the clamping force. Elastically bends and deforms, and simplifies the crankshaft lifting process by rotating the connecting piece.
It solves the problem that the outer circle and end face of the steps at both ends of the crankshaft cannot be ground, improves the machining accuracy of the crankshaft journal, reduces the deviation of the runout value, simplifies the crankshaft lifting operation, and reduces the production cost and repair rate.
Smart Images
Figure CN222371112U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of crankshaft processing tooling, and particularly relates to an adjustable crankshaft grinding connection tooling. Background Art
[0002] The existing crankshaft grinding process basically adopts the center clamping and tightening positioning. During the processing, the crankshaft is always in a rigid state (the cutting stress cannot be bent and released). As the equipment is used for a long time and the clamping center wears more, the crankshaft journal processing accuracy gradually decreases. The crankshaft journal runout value deviation is large after grinding, which does not meet the customer's high quality requirements. The process quality rework and rework rate is as high as 10%, and the scrap rate is as high as 3%. In addition, the outer circle and end face of the step at both ends of the crankshaft cannot be ground due to the interference between the dial and the center, and need to be completed in the next process, which prolongs the production cycle. This problem has not been completely solved, which not only causes hidden dangers in the process quality, but also the quality scrap is high, and the production cost is wasted. Utility Model Content
[0003] In order to solve the above problems existing in the prior art, the purpose of the utility model is to provide an adjustable crankshaft grinding connection tool.
[0004] The technical solution adopted by the utility model is:
[0005] An adjustable crankshaft grinding connection tooling is characterized in that it includes an equipment base, a plurality of center brackets are installed on the equipment base, and a crankshaft, which is arranged on the plurality of center brackets, and an equipment power end is installed at one end of the equipment base; it also includes a front end flange universal joint and a rear end flange universal joint, the front end flange universal joint is fixed on the equipment power end, the rear end flange universal joint is connected to the crankshaft, and the front end flange universal joint is connected to the rear end flange universal joint.
[0006] The adjustable crankshaft grinding connection tool of the utility model connects the power end of the equipment and the crankshaft respectively, and the other end of the crankshaft is not connected, replacing the traditional two-end center fixed grinding crankshaft, solving the problem that the outer circle and end surface of the two end steps cannot be ground when the two centers of the crankshaft are clamped and ground. The adjustable crankshaft grinding connection tool includes a front flange universal joint and a rear flange universal joint, which avoids a certain degree of elastic bending deformation caused by the clamping and tightening force of the crankshaft.
[0007] As a preferred solution of the utility model, at least two spaced rotating connectors are connected between the front flange universal joint and the rear flange universal joint. In the process of lifting the crankshaft, the rear flange universal joint and the crankshaft are not disassembled, which can simplify the operation. When the rotating connector between the front flange universal joint and the rear flange universal joint is disassembled until only one is left, the rear flange universal joint can be rotated 90° in both directions to avoid interference with the tooling during the crankshaft lifting.
[0008] As a preferred solution of the utility model, the rotating connecting member between the front flange universal joint and the rear flange universal joint includes a locking screw and a connecting pin. When lifting the crankshaft, the locking screw is removed and the connecting pin is loosened, so that the rear flange universal joint and the front flange universal joint can rotate relative to each other, avoiding interference with the tooling during the crankshaft lifting.
[0009] As a preferred solution of the utility model, the rotating connecting member connected between the front flange universal joint and the rear flange universal joint also includes a guide member. Before connecting the locking screw, the guide member is first installed to play a guiding role and facilitate the installation of the locking screw. When lifting the crankshaft, the guide member and the locking screw are removed together.
[0010] As a preferred solution of the utility model, the rear end flange universal joint is connected to the process hole of the crankshaft by bolts. The rear end flange universal joint is connected to the process hole of the crankshaft by bolts, and the outer circle of the crankshaft journal is used for positioning to ensure reliable connection, thereby avoiding the use of a top clamp to tighten the other end of the crankshaft.
[0011] As a preferred solution of the utility model, the central support is connected with a horizontal support block and a vertical support block, and the ends of the horizontal support block and the vertical support block are in contact with the crankshaft. The horizontal support block and the vertical support block of the central support are adjusted so that all the central supports are supported at the center of the crankshaft journal, so that the adjustable crankshaft grinding connection tooling and the crankshaft are at the same center horizontal line in the X direction.
[0012] As a preferred solution of the utility model, the rear end flange universal joint, the front end flange universal joint and the crankshaft are processed in the same center line in the X direction.
[0013] As a preferred solution of the utility model, a crankshaft gauge is installed at the base point of the inner side surface of the middle crank of the crankshaft. The crankshaft gauge is installed at the base point of the inner side surface of the middle crank of the crankshaft, and the crankshaft gauge measurement value is observed, and the measurement is made from the middle to both ends in sequence.
[0014] As a preferred solution of the utility model, a micrometer and a dial indicator are also included for detecting the initial grinding value of each journal of the crankshaft. The micrometer and the dial indicator are used to detect the initial grinding value of each journal of the crankshaft.
[0015] As a preferred solution of the utility model, a grinding wheel for grinding the crankshaft is installed on the equipment base.
[0016] The beneficial effects of the utility model are:
[0017] 1. The adjustable crankshaft grinding connection tool of the utility model connects the power end of the equipment and the crankshaft respectively, and the other end of the crankshaft is not connected, replacing the traditional two-end center fixed grinding crankshaft, solving the problem that the outer circle and end surface of the two ends of the step cannot be ground when the two centers of the crankshaft are clamped and ground. The adjustable crankshaft grinding connection tool includes a front flange universal joint and a rear flange universal joint, which avoids a certain degree of elastic bending deformation caused by the clamping force of the crankshaft.
[0018] 2. In the process of lifting the crankshaft, the rear flange universal joint and the crankshaft are not disassembled, which can simplify the operation. Disassemble the rotating connection between the front flange universal joint and the rear flange universal joint until only one is left, and the rear flange universal joint can be rotated 90° in both directions to avoid interference with the tooling during the crankshaft lifting. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a structural schematic diagram of the utility model;
[0020] Figure 2 It is a structural schematic diagram of an adjustable crankshaft grinding connection tool and a crankshaft;
[0021] Figure 3 It is a partial structural diagram of the utility model;
[0022] Figure 4 It is a schematic diagram of the structure when the adjustable crankshaft grinding connection tooling is in a straight line;
[0023] Figure 5 It is a cross-sectional view of the adjustable crankshaft grinding connection tooling when it is in a straight line;
[0024] Figure 6 It is a schematic diagram of the structure when the adjustable crankshaft grinding connection fixture is at 90°.
[0025] In the figure: 1-front end flange universal joint; 2-rear end flange universal joint; 3-locking screw; 4-guide; 5-connecting pin; 6-crankshaft; 7-grinding wheel; 8-dial indicator; 9-micrometer; 10-crankshaft gauge; 11-center bracket; 12-equipment power end; 13-equipment free end; 14-equipment base; 111-horizontal support block; 112-vertical support block. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0027] 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 merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.
[0028] like Figure 1 to Figure 6 As shown, the adjustable crankshaft grinding connection tooling of this embodiment is characterized by: comprising an equipment base 14, on which a plurality of center brackets 11 are installed, and also comprising a crankshaft 6, which is arranged on a plurality of center brackets 11, and an equipment power end 12 is installed at one end of the equipment base 14; and also comprising a front end flange universal joint 1 and a rear end flange universal joint 2, the front end flange universal joint 1 is fixed on the equipment power end 12, the rear end flange universal joint 2 is connected to the crankshaft 6, and the front end flange universal joint 1 is connected to the rear end flange universal joint 2. A grinding wheel 7 for grinding the crankshaft 6 is installed on the equipment base 14. A spare equipment free end 13 is also installed on the equipment base 14.
[0029] The adjustable crankshaft grinding connection tool of the utility model connects the power end 12 of the equipment and the crankshaft 6 respectively, and the other end of the crankshaft 6 is not connected, replacing the traditional two-end center fixed grinding crankshaft 6, and solves the problem that the outer circle of the two end steps and the end surface cannot be ground when the two centers of the crankshaft 6 are clamped and ground. The adjustable crankshaft grinding connection tool includes a front flange universal joint 1 and a rear flange universal joint 2, avoiding a certain degree of elastic bending deformation caused by the clamping and tightening force of the crankshaft 6.
[0030] There are at least two spaced rotating connectors connected between the front flange universal joint 1 and the rear flange universal joint 2. In the process of lifting the crankshaft 6, the rear flange universal joint 2 and the crankshaft 6 are not disassembled, which can simplify the operation. When the rotating connector between the front flange universal joint 1 and the rear flange universal joint 2 is disassembled until only one is left, the rear flange universal joint 2 can be rotated 90° in both directions to avoid interference with the tooling during the lifting of the crankshaft 6.
[0031] Specifically, the rotating connection member connected between the front flange universal joint 1 and the rear flange universal joint 2 includes a locking screw 3, a connecting pin 5 and a guide member 4. Before connecting the locking screw 3, the guide member 4 is installed first to play a guiding role and facilitate the installation of the locking screw 3. When lifting the crankshaft 6, the locking screw 3 and the guide member 4 are removed, and the connecting pin 5 is loosened, so that the rear flange universal joint 2 and the front flange universal joint 1 can rotate relative to each other, avoiding interference with the tooling during the lifting of the crankshaft 6.
[0032] The rear end flange universal joint 2 is connected to the process hole of the crankshaft 6 by bolts. The rear end flange universal joint 2 is connected to the process hole of the crankshaft 6 by bolts, and the outer circle of the journal of the crankshaft 6 is used for positioning to ensure reliable connection, thereby avoiding the use of a top clamp at the other end of the crankshaft 6 for tightening and positioning.
[0033] In order to facilitate the adjustment of the crankshaft 6, the center bracket 11 is connected with a horizontal support block 111 and a vertical support block 112, and the ends of the horizontal support block 111 and the vertical support block 112 are in contact with the crankshaft 6. The horizontal support block 111 and the vertical support block 112 of the center bracket 11 are adjusted so that all the center brackets 11 are supported at the center of the crankshaft 6 journal, so that the adjustable crankshaft grinding connection tooling and the crankshaft 6 are at the same center horizontal line in the X direction.
[0034] The crankshaft 6 gauge is installed at the crank inner side base point of the middle crankshaft 6. The crankshaft 6 gauge is installed at the crank inner side base point of the middle crankshaft 6, and the crankshaft 6 gauge measurement value is observed, and the measurement is made from the middle to both ends in sequence.
[0035] The utility model also includes a micrometer 9 and a dial indicator 8 for detecting the initial grinding value of each journal of the crankshaft 6. The micrometer 9 and the dial indicator 8 are used to detect the initial grinding value of each journal of the crankshaft 6.
[0036] Crankshaft 6 grinding preparation and debugging steps: The adjustable crankshaft grinding connection tool is fixed to the crankshaft 6 on the center bracket 11, and the crankshaft 6 gauge is installed at the base point of the inner side of the middle crank of the crankshaft 6. Observe the measurement value of the crankshaft 6 gauge, measure from the middle to both ends in turn, adjust the horizontal support block 111 and the vertical support block 112 on the center bracket 11 so that all center brackets 11 are supported on the center of the crankshaft 6 journal, use the micrometer 9 and the dial indicator 8 to detect the initial grinding value of each gear journal of the crankshaft 6, and tighten the crankshaft 6 by adjusting the horizontal support block 111 and the vertical support block 112 on each group of center brackets 11.
[0037] Grinding wheel tool setting steps: Tool setting - outer circle and end face, determine the position of the grinding wheel 7 and then proceed with the crankshaft 6 grinding process.
[0038] The present utility model is not limited to the above-mentioned optional implementation modes. Anyone can derive other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in the shape or structure, all technical solutions that fall within the scope defined by the claims of the present utility model fall within the protection scope of the present utility model.
Claims
1. An adjustable crankshaft grinding connection tool, characterized in that: The invention comprises an equipment base (14), a plurality of center brackets (11) are installed on the equipment base (14), a crankshaft (6) is arranged on the plurality of center brackets (11), and an equipment power end (12) is installed on one end of the equipment base (14); the invention also comprises a front end flange universal joint (1) and a rear end flange universal joint (2), the front end flange universal joint (1) is fixed on the equipment power end (12), the rear end flange universal joint (2) is connected to the crankshaft (6), and the front end flange universal joint (1) is connected to the rear end flange universal joint (2).
2. The adjustable crankshaft grinding and connecting tool according to claim 1, characterized in that: At least two rotating connecting parts arranged at intervals are connected between the front end flange universal joint (1) and the rear end flange universal joint (2).
3. The adjustable crankshaft grinding and connecting tool according to claim 2, characterized in that: The rotating connection piece connecting the front flange universal joint (1) and the rear flange universal joint (2) comprises a locking screw (3) and a connecting pin (5).
4. The adjustable crankshaft grinding and connecting tool according to claim 3, characterized in that: The rotating connection piece connecting the front end flange universal joint (1) and the rear end flange universal joint (2) further comprises a guide piece (4).
5. The adjustable crankshaft grinding and connecting tool according to claim 1, characterized in that: The rear end flange universal joint (2) is connected to the process hole of the crankshaft (6) via bolts.
6. The adjustable crankshaft grinding and connecting tool according to claim 1, characterized in that: The central support (11) is connected to a horizontal support block (111) and a vertical support block (112), and ends of the horizontal support block (111) and the vertical support block (112) are in contact with the crankshaft (6).
7. The adjustable crankshaft grinding and connecting tool according to claim 1, characterized in that: The rear end flange universal joint (2), the front end flange universal joint (1) and the crankshaft (6) are processed in the same center line in the X direction.
8. The adjustable crankshaft grinding and connecting tool according to claim 1, characterized in that: A crankshaft (6) gauge is installed at a base point on the inner side surface of the middle crank of the crankshaft (6).
9. The adjustable crankshaft grinding and connecting tool according to claim 1, characterized in that: It also includes a micrometer (9) and a dial indicator (8) for detecting the initial grinding value of each gear journal of the crankshaft (6).
10. The adjustable crankshaft grinding and connecting tool according to claim 1, characterized in that: A grinding wheel (7) for grinding the crankshaft (6) is installed on the equipment base (14).