Single-cylinder crankshaft pressing mechanism and dynamic balance testing device

Abstract

The utility model provides a single-cylinder crankshaft pressing mechanism which comprises a first pressing assembly and a second pressing assembly which are located on the two sides of a connecting rod neck of a crankshaft and used for pressing and limiting main shafts on the two sides of the connecting rod neck respectively. The first pressing assembly and the second pressing assembly each comprise a supporting base, a driving part and a pressing arm, an arc-shaped clamping opening used for supporting the main shaft is formed in the top face of each supporting base, and the driving parts are used for driving the pressing arms to rotate so as to be matched with the arc-shaped clamping openings to press and limit the main shaft. According to the utility model, the driving part is arranged to drive the pressing arm to rotate and cooperate with the arc-shaped clamping opening to press and limit the main shafts on the two sides of the connecting rod neck of the crankshaft, automatic pressing and limiting of the crankshaft can be realized through electric control without manual operation of the locking frame, the operation process is simplified, and the efficiency of crankshaft dynamic balance testing is improved; and the requirement of large-batch automatic testing of crankshafts can be met.

Description

Technical Field

[0001] The present application relates to the technical field of crankshaft dynamic balancing test equipment, and in particular to a single-cylinder crankshaft clamping mechanism and a dynamic balancing test device. Background Art

[0002] The single-cylinder crankshaft is an important component inside a motorcycle engine. Since it has a large inherent imbalance, its radial runout and axial movement must be limited during dynamic balancing measurement to ensure measurement accuracy.

[0003] like Figure 1 As shown in the figure, in order to prevent the radial runout of the crankshaft when it rotates at high speed, a locking frame is commonly used to clamp the crankshaft at home and abroad. This structure requires manual loosening of the locking frame, placing the crankshaft and then locking it, which is complicated to operate and inefficient. It is only suitable for small manual balancing machines and cannot meet the requirements of automated mass production. In addition, its clamping force depends entirely on the operator's subjective feeling and is not easy to control. Summary of the invention

[0004] The present application provides a single-cylinder crankshaft clamping mechanism and a dynamic balancing test device, which solve the problems of complex operation and low efficiency when performing dynamic balancing test on the crankshaft by locking the crankshaft through a locking frame in the prior art.

[0005] The first aspect of the present application provides a single-cylinder crankshaft clamping mechanism, comprising a first clamping assembly and a second clamping assembly located on both sides of the connecting rod neck of the crankshaft, respectively used to clamp and limit the main shaft on both sides of the connecting rod neck;

[0006] The first clamping assembly and the second clamping assembly both include a support seat, a driving component and a clamping arm. The top surface of the support seat is provided with an arc-shaped clamp for supporting the main shaft. The driving component is used to drive the clamping arm to rotate to cooperate with the arc-shaped clamp to clamp and limit the main shaft.

[0007] In the technical solution provided in the present application, a driving component is provided to drive the pressure arm to rotate and cooperate with the arc-shaped clamp to clamp and limit the main shaft on both sides of the connecting rod neck of the crankshaft. The automatic clamping and limiting of the crankshaft can be achieved through electronic control without manual operation of the locking frame, which simplifies the operating process, improves the efficiency of the crankshaft dynamic balancing test, and can meet the needs of large-scale automated testing of crankshafts.

[0008] In some embodiments, the first clamping assembly includes a first supporting seat, a first driving component and a first pressing arm, the bottom end height of the first pressing arm corresponds to the top surface height of the main shaft, and the first driving component is used to drive the first pressing arm to rotate in a horizontal direction; when the first driving component drives the first pressing arm to rotate above the main shaft, the bottom end of the first pressing arm cooperates with the arc-shaped clamp on the top surface of the first supporting seat to form a radial limit for the main shaft to prevent radial jitter of the main shaft during rotation; when the test is completed, the first pressing arm can be driven by the first driving component to rotate to one side of the main shaft to facilitate the removal of the tested crankshaft.

[0009] In some embodiments, a roller is installed at the bottom end of the first pressure arm, and the axial direction of the roller is parallel to the axial direction of the main shaft; by installing the roller at the bottom end of the first pressure arm, the friction between the main shaft and the bottom end of the first pressure arm can be reduced during rotation.

[0010] In some embodiments, the second clamping assembly includes a second support seat, a second driving component and a second pressing arm, and the second driving component is used to drive the second pressing arm to rotate in a vertical direction, thereby cooperating with the arc-shaped clamping opening on the top surface of the second support seat to form a radial limit for the main shaft.

[0011] In some embodiments, the second driving component is a telescopic component, and the telescopic rod of the second driving component is hinged to the second pressure arm through a first hinge support, and the tail of the second driving component is hinged to the side wall of the second support seat through a second hinge support; the end of the second pressure arm away from the arc-shaped clamp is hinged to the second support seat; the telescopic rod is driven to be telescoped by the second driving component, driving the second pressure arm to rotate around the second support seat, thereby realizing the opening and closing action of the second pressure arm and the arc-shaped clamp on the top surface of the second support seat, thereby realizing the clamping or loosening of the main shaft.

[0012] In some embodiments, the driving component is a hydraulic cylinder, a pneumatic cylinder or a motor.

[0013] The second aspect of the present application provides a single-cylinder crankshaft dynamic balancing test device, including the above-mentioned clamping mechanism.

[0014] In some embodiments, the testing device further comprises a shift fork, which cooperates with the connecting rod neck of the crankshaft, and the shift fork is connected to the turntable through a shift rod; the support seat of the first clamping assembly is installed on the inner end surface of the fixed disk, and the outer end surface of the fixed disk is provided with a bearing, and the turntable is rotatably installed on the bearing; by driving the turntable to rotate, the turntable drives the shift fork to rotate through the shift rod, and the shift fork drives the connecting rod neck of the crankshaft to rotate around the main axis, thereby realizing the dynamic balance test of the crankshaft; during the test, the fixed disk does not rotate with the turntable, and the first clamping assembly is located in the cylindrical envelope surface formed by the rotation of the shift rod, and the rotation path of the shift rod will not interfere with the first clamping assembly.

[0015] In some embodiments, the shift fork is U-shaped, and a limit block is provided on the inner bottom surface of the U-shaped mouth of the shift fork, and the width of the limit block matches the width of the connecting rod neck; by providing a limit block on the inner bottom surface of the U-shaped mouth of the shift fork and clamping the connecting rod neck with the limit block, axial movement of the crankshaft during the dynamic balancing test can be prevented, thereby further ensuring the stability of the crankshaft dynamic balancing test.

[0016] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings in this application are used to illustrate preferred embodiments, so that those skilled in the art can clearly understand various other advantages and benefits, and should not be considered as limitations of this application. In addition, the same reference numerals are used throughout the drawings to represent the same or similar components.

[0018] Figure 1 It is a schematic diagram of the structure of clamping the crankshaft by a locking frame in the prior art;

[0019] Figure 2 This is a structural schematic diagram of a single-cylinder crankshaft clamping mechanism in one embodiment of the present application;

[0020] Figure 3 This is a schematic structural diagram of a first clamping assembly in an embodiment of the present application;

[0021] Figure 4 This is a schematic diagram of the structure of the second clamping assembly in one embodiment of the present application;

[0022] Figure 5 This is a structural schematic diagram of a dynamic balance test device when a clamping mechanism clamps a crankshaft in one embodiment of the present application;

[0023] Figure 6 This is a structural schematic diagram of a dynamic balance test device when a clamping mechanism releases a crankshaft in one embodiment of the present application;

[0024] Figure 7 This is a schematic diagram of the structure of the cooperation between the limit block and the connecting rod neck in one embodiment of the present application;

[0025] Icons: 1. First clamping assembly; 2. Second clamping assembly; 3. Connecting rod neck; 4. Main shaft; 5. First supporting seat; 6. First driving component; 7. First pressing arm; 8. Roller; 9. Second supporting seat; 10. Second driving component; 11. Second pressing arm; 12. First hinge support; 13. Second hinge support; 14. Fork; 15. Shift rod; 16. Turntable; 17. Fixed plate; 18. Limit block. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0028] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two (including two), unless otherwise clearly and specifically defined.

[0029] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0030] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0031] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0032] See also Figure 2-Figure 7 In a first aspect, an embodiment of the present application provides a single-cylinder crankshaft clamping mechanism, comprising a first clamping assembly 1 and a second clamping assembly 2 located on both sides of a connecting rod neck 3 of the crankshaft, respectively used to clamp and limit the main shaft 4 on both sides of the connecting rod neck 3;

[0033] The first clamping assembly 1 and the second clamping assembly 2 both include a support seat, a driving component and a clamping arm. The top surface of the support seat is provided with an arc-shaped clamp for supporting the main shaft 4. The driving component is used to drive the clamping arm to rotate to cooperate with the arc-shaped clamp to clamp and limit the main shaft 4.

[0034] In the technical solution provided in the present application, a driving component is provided to drive the pressure arm to rotate and cooperate with the arc-shaped clamp to clamp and limit the main shaft 4 on both sides of the connecting rod neck 3 of the crankshaft. The automatic clamping and limiting of the crankshaft can be achieved through electronic control without manual operation of the locking frame, which simplifies the operating process, improves the efficiency of the crankshaft dynamic balancing test, and can meet the needs of large-scale automated testing of crankshafts.

[0035] Please continue reading Figure 3 In some embodiments, the first clamping assembly 1 includes a first supporting seat 5, a first driving component 6 and a first pressing arm 7. The bottom end height of the first pressing arm 7 corresponds to the top surface height of the main shaft 4. The first driving component 6 is used to drive the first pressing arm 7 to rotate in the horizontal direction; when the first driving component 6 drives the first pressing arm 7 to rotate above the main shaft 4, the bottom end of the first pressing arm 7 cooperates with the arc-shaped clamp on the top surface of the first supporting seat 5 to form a radial limit for the main shaft 4 to prevent the main shaft 4 from radially shaking during rotation; when the test is completed, the first pressing arm 7 can be driven by the first driving component 6 to rotate to the side of the main shaft 4, so as to facilitate the removal of the crankshaft after the test.

[0036] Please continue reading Figure 3 In some embodiments, in some implementations, a roller 8 is installed at the bottom end of the first pressure arm 7, and the axial direction of the roller 8 is parallel to the axial direction of the main shaft 4; by installing the roller 8 at the bottom end of the first pressure arm 7, the friction between the main shaft 4 and the bottom end of the first pressure arm 7 can be reduced during rotation.

[0037] Please continue reading Figure 3 In a specific embodiment, the first pressure arm 7 includes a horizontal arm and a vertical arm, the first driving component 6 is a rotating component, and its output shaft is vertically upward. One end of the horizontal arm is fixedly installed on the output shaft of the first driving component 6, and the other end of the horizontal arm is fixedly connected to the top end of the vertical arm, and the roller 8 is installed at the bottom end of the vertical arm.

[0038] Please continue reading Figure 4 In some embodiments, the second clamping assembly 2 includes a second support seat 9, a second driving component 10 and a second pressing arm 11. The second driving component 10 is used to drive the second pressing arm 11 to rotate in a vertical direction, thereby cooperating with the arc-shaped clamping opening on the top surface of the second support seat 9 to form a radial limit for the main shaft 4.

[0039] Please continue reading Figure 4 In some embodiments, the second driving component 10 is a telescopic component, and the telescopic rod of the second driving component 10 is hinged to the second pressure arm 11 through a first hinge support 12, and the tail of the second driving component 10 is hinged to the side wall of the second support seat 9 through a second hinge support 13; the end of the second pressure arm 11 away from the arc-shaped clamp is hinged to the second support seat 9; the second driving component 10 drives its telescopic rod to extend and retract, driving the second pressure arm 11 to rotate around the second support seat 9, thereby realizing the opening and closing action of the second pressure arm 11 and the arc-shaped clamp on the top surface of the second support seat 9, thereby realizing the clamping or loosening of the main shaft 4.

[0040] Please continue reading Figure 4 In a specific embodiment, the second pressing arm 11 is an "L"-shaped arm, and the "inflection point" in the middle of the "L"-shaped arm is hinged to the telescopic rod of the second driving component 10, one end of the "L"-shaped arm is hinged to the part of the second support seat 9 near one end of the arc-shaped clamp, and the other end of the "L"-shaped arm cooperates with the other end of the arc-shaped clamp to achieve clamping and limiting of the main shaft 4.

[0041] In a specific embodiment, when the second driving component 10 drives the second pressing arm 11 to cooperate with the arc-shaped clamping opening of the second supporting seat 9 to limit the main shaft 4, in order to ensure that the rotation of the main shaft 4 is not affected, the pressing force of the second pressing arm 11 on the main shaft 4 will not be too large, thereby ensuring that the main shaft 4 will not vibrate radially during rotation.

[0042] In a specific implementation process, a roller 8 may also be provided on the arc-shaped jaws of the second support seat 9 and / or the contact surface between the second pressure arm 11 and the spindle 4 to reduce the friction of the rotation of the spindle 4. In this embodiment, in order to reduce the friction of the rotation of the spindle 4, lubricating oil may also be applied to the arc-shaped jaws of the second support seat 9.

[0043] In some embodiments, the driving component is a hydraulic cylinder, a gas cylinder or a motor. During the specific implementation, the corresponding driving component can be flexibly selected according to the actual situation.

[0044] Please continue reading Figure 5 , Figure 6 The second embodiment of the present application provides a single-cylinder crankshaft dynamic balancing test device, including the above-mentioned clamping mechanism.

[0045] Please continue reading Figure 5 In some embodiments, the test device further comprises a shift fork 14, wherein the shift fork 14 cooperates with the connecting rod neck 3 of the crankshaft, and the shift fork 14 is connected to the turntable 16 through a shift rod 15; the support seat of the first clamping assembly 1 is installed on the inner end surface of the fixed disk 17, and the outer end surface of the fixed disk 17 is provided with a bearing (the bearing can be fixed on the external bracket of the test device), and the turntable 16 is rotatably installed on the bearing; by driving the turntable 16 to rotate, the turntable 16 drives the shift fork 14 to rotate through the shift rod 15, and the shift fork 14 drives the connecting rod neck 3 of the crankshaft to rotate around the main shaft 4, thereby realizing the dynamic balance test of the crankshaft; during the test, the fixed disk 17 does not rotate with the turntable 16, and the first clamping assembly 1 is located in the cylindrical envelope surface formed by the rotation of the shift rod 15, and the rotation path of the shift rod 15 will not interfere with the first clamping assembly 1.

[0046] Please continue reading Figure 5 , Figure 7 In some embodiments, the shift fork 14 is U-shaped, and a limit block 18 is provided on the inner bottom surface of the U-shaped opening of the shift fork 14, and the width of the limit block 18 matches the width of the connecting rod neck 3 (corresponding to the distance between the inner walls of the cranks on both sides of the connecting rod neck 3); by providing the limit block 18 on the inner bottom surface of the U-shaped opening of the shift fork 14, the limit block 18 always rotates synchronously with the connecting rod neck 3, and the limit block 18 clamps the connecting rod neck 3, which can prevent the crankshaft from axial movement during the dynamic balancing test, thereby further ensuring the stability of the crankshaft dynamic balancing test.

[0047] The process of dynamic balancing test in this embodiment is as follows:

[0048] First, the first driving component 6 is controlled to drive the first pressing arm 7 to rotate clockwise (viewed from top to bottom) to the initial position, and the second driving component 10 is controlled to drive its telescopic rod to retract, so that the second pressing arm 11 rotates counterclockwise (viewed from right to left) around the second supporting seat 9 to the initial position, and then the crankshaft is placed on the test station, so that the connecting rod neck 3 of the crankshaft is placed on the fork 14, and the limit block 18 is ensured to clamp the connecting rod neck 3, and the main shaft 4 on both sides of the connecting rod neck 3 is respectively placed on the arc-shaped clamping openings of the first supporting seat 5 and the second supporting seat 9, as shown in FIG. Figure 6Then, the first driving component 6 is controlled to drive the first pressing arm 7 to rotate counterclockwise to the locking position, so that the first pressing arm 7 presses the top surface of the left main shaft 4; the second driving component 10 is controlled to drive its telescopic rod to extend, so that the second pressing arm 11 rotates clockwise around the second supporting seat 9 to the locking position, ensuring that the second pressing arm 11 cooperates with the arc-shaped clamping opening on the top surface of the second supporting seat 9 to clamp the right main shaft 4, as shown. Figure 5 As shown; finally, the drive turntable 16 is rotated, and the turntable 16 drives the fork 14 to rotate through the shift rod 15, and the shift fork 14 drives the connecting rod neck 3 to rotate around the main shaft 4, so as to realize the dynamic balance test of the crankshaft; during the rotation of the crankshaft, the first clamping mechanism and the second clamping mechanism can ensure that the main shaft 4 will not vibrate radially, and the limit block 18 arranged on the inner bottom surface of the U-shaped mouth of the shift fork 14 can clamp the inner wall of the crank on both sides of the connecting rod neck 3 to prevent the crankshaft from axial movement during rotation, thereby ensuring the accuracy of the dynamic balance test of the crankshaft.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A single-cylinder crankshaft clamping mechanism, characterized in that: It comprises a first clamping assembly (1) and a second clamping assembly (2) located on both sides of a connecting rod neck (3) of a crankshaft, and is used to clamp and limit the main shaft (4) on both sides of the connecting rod neck (3); The first clamping assembly (1) and the second clamping assembly (2) both comprise a support seat, a driving component and a clamping arm. The top surface of the support seat is provided with an arc-shaped clamp for supporting the main shaft (4). The driving component is used to drive the clamping arm to rotate so as to cooperate with the arc-shaped clamp to clamp and limit the main shaft (4).

2. A single-cylinder crankshaft clamping mechanism according to claim 1, characterized in that: The first clamping assembly (1) comprises a first supporting seat (5), a first driving component (6) and a first pressing arm (7); the bottom end height of the first pressing arm (7) corresponds to the top surface height of the main shaft (4); and the first driving component (6) is used to drive the first pressing arm (7) to rotate in a horizontal direction.

3. A single-cylinder crankshaft clamping mechanism according to claim 2, characterized in that: A roller (8) is installed at the bottom end of the first pressing arm (7), and the axial direction of the roller (8) is parallel to the axial direction of the main shaft (4).

4. A single-cylinder crankshaft clamping mechanism according to claim 1, characterized in that: The second pressing assembly (2) comprises a second supporting seat (9), a second driving component (10) and a second pressing arm (11), wherein the second driving component (10) is used to drive the second pressing arm (11) to rotate in a vertical direction.

5. A single-cylinder crankshaft clamping mechanism according to claim 4, characterized in that: The second driving component (10) is a telescopic component, and the telescopic rod of the second driving component (10) is hinged to the second pressure arm (11) through a first hinge support (12), and the tail of the second driving component (10) is hinged to the side wall of the second support seat (9) through a second hinge support (13); the end of the second pressure arm (11) away from the arc-shaped clamping opening is hinged to the second support seat (9).

6. A single-cylinder crankshaft clamping mechanism according to claim 1, characterized in that: The driving component is a hydraulic cylinder, a gas cylinder or a motor.

7. A single-cylinder crankshaft dynamic balance test device, characterized in that: It comprises the clamping mechanism as claimed in any one of claims 1 to 6.

8. A single-cylinder crankshaft dynamic balancing test device according to claim 7, characterized in that: It comprises a shift fork (14), the shift fork (14) cooperates with the connecting rod neck (3) of the crankshaft, and the shift fork (14) is connected to the rotating disk (16) through a shift rod (15); the support seat of the first clamping assembly (1) is installed on the inner end surface of the fixed disk (17), the outer end surface of the fixed disk (17) is provided with a bearing, and the rotating disk (16) is rotatably installed on the bearing.

9. A single-cylinder crankshaft dynamic balancing test device according to claim 8, characterized in that: The shift fork (14) is U-shaped, and a limit block (18) is provided on the inner bottom surface of the U-shaped opening of the shift fork (14), and the width of the limit block (18) matches the width of the connecting rod neck (3).

Images