Polishing assistive device for engine crankshaft

Abstract

The utility model discloses an auxiliary polishing tool for an engine crankshaft, which belongs to the technical field of polishing and comprises a first driving part and a second driving part, an elastic assembly is arranged in the chuck, the first end of the chuck is in driving connection with the first driving part, and the chuck is driven by the first driving part to rotate; the first end of the synchronizer is mounted at the second end of the chuck, and the second end of the synchronizer is slidably connected with the first end of the crankshaft; the first end of the elastic assembly extends out of the chuck, penetrates through the synchronizer and then abuts against the center of the first end of the crankshaft; the telescopic direction of the elastic assembly is coaxial with the crankshaft. The fixing device abuts against the second end of the crankshaft. When the chuck is driven by the first driving part to rotate, the synchronizer and the crankshaft rotate synchronously, and the crankshaft moves in the axial direction in the polishing process, the elastic assembly plays a role in buffering movement of the crankshaft through deformation of the elastic assembly, meanwhile, the range of movement of the crankshaft in the axial direction is limited, and the crankshaft polishing precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of polishing, in particular to an auxiliary tool for polishing an engine crankshaft. Background Art

[0002] At present, during the polishing process of a V-type 12-cylinder engine crankshaft, a gear train that cooperates with the two flange surfaces of the crankshaft and a universal wheel at one end are used to drive the crankshaft to rotate, so as to realize the polishing of the crankshaft. However, due to the large size of the V-type 12-cylinder engine crankshaft, the existing method has weak axial positioning, and the crankshaft is prone to excessive axial movement, which affects the polishing accuracy, resulting in a low product qualification rate and a short service life; the gear train that drives the crankshaft to rotate is greatly affected by time, and is prone to slipping after a long time, and the operation is cumbersome, with low precision and easy to damage the parts.

[0003] The polishing device described in the utility model patent with the application number 202111023499.4 and the name of a polishing device for automotive parts includes a bottom plate, an adjustment component, a fixing component for fixing the crankshaft, a rotating component for driving the fixing component to rotate, and a polishing component for polishing the crankshaft; the fixing component includes two fixing mechanisms arranged symmetrically, the fixing mechanism includes a fixing plate and a fixture component arranged on one side of the fixing plate, the rotating component includes two rotating mechanisms arranged symmetrically, and the two rotating mechanisms are used to drive the two fixing plates to rotate respectively. Although it can drive the crankshaft to rotate and polish, it cannot solve the problem of excessive axial movement of the crankshaft during the polishing process. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an auxiliary tool for polishing an engine crankshaft. The synchronizer is driven to rotate by the chuck, the synchronizer drives the crankshaft to rotate, and the elastic component abuts against the crankshaft, restricting the axial movement range during the polishing process of the crankshaft, and solving the problems of low product qualification rate and short service life of the engine crankshaft processed according to the existing technology.

[0005] The utility model provides the following solutions:

[0006] The utility model describes an auxiliary tool for polishing an engine crankshaft, including:

[0007] A first driving part;

[0008] A chuck, an elastic component is arranged inside the chuck, the first end of the chuck is drivingly connected to the first driving part, and the chuck rotates under the drive of the first driving part;

[0009] A synchronizer, the first end of the synchronizer is installed at the second end of the chuck, and the second end of the synchronizer is slidably connected to the first end of the crankshaft;

[0010] After the first end of the elastic component extends out of the chuck and passes through the synchronizer, it abuts against the center of the first end of the crankshaft; the telescopic direction of the elastic component is coaxial with the crankshaft;

[0011] A fixing device, which abuts against the second end of the crankshaft.

[0012] Preferably, the second end of the synchronizer is slidably connected to the first end of the crankshaft through a connecting column; the first end of the connecting column is installed at the second end of the synchronizer, and the second end of the connecting column is connected in a pin hole provided at the first end of the crankshaft and slides along the axial direction of the crankshaft.

[0013] Preferably, the elastic component includes:

[0014] A sleeve, which is arranged in the middle of the chuck, the first end of the sleeve extends out of the second end of the chuck, and the first end of the synchronizer is sleeved on the first end of the sleeve;

[0015] An inner tube, which is slidably arranged in the sleeve, and the first end of the inner tube extends out of the first end of the sleeve;

[0016] A spring, which is arranged in the sleeve, and both ends of the spring abut against the inner wall of the second end of the sleeve and the second end of the inner tube respectively;

[0017] A first centering center point, the first end of the first centering center point is installed at the first end of the inner tube, and the second end of the first centering center point passes through the synchronizer and abuts against the first end of the crankshaft.

[0018] Preferably, a through hole for the first end of the sleeve, the first end of the inner tube and the first centering center point to pass through is provided in the synchronizer, and a washer is provided on the inner circumference of the through hole;

[0019] A groove is provided at a position corresponding to the washer on the outer circumference of the first end of the sleeve, and the first end of the synchronizer and the first end of the sleeve are fixedly connected through the washer and the groove.

[0020] Preferably, a chuck column is provided on the chuck;

[0021] An installation hole is provided at a position corresponding to the chuck column at the first end of the synchronizer, and the chuck column and the installation hole are connected in a clearance fit.

[0022] Preferably, the fixing device includes:

[0023] A second centering center point, which abuts against the second end of the crankshaft.

[0024] Preferably, a feeding mechanism is further included, and the feeding mechanism includes;

[0025] A sliding rod, with both ends of the sliding rod connected to a second driving part, and the second driving part drives the sliding rod to rotate;

[0026] A sliding base, which is slidably connected to the sliding rod along the axial direction of the sliding rod;

[0027] A torsion brake block, one end of the torsion brake block is installed on the sliding base, and the other end of the torsion brake block is provided with a clamping part, and the clamping part clamps on the crankshaft;

[0028] A support block, one end of the support block is installed on the sliding base, and the other end of the support block is provided with a support part, and the support part supports the lower end of the crankshaft.

[0029] Preferably, a rubber layer is provided on the contact surface between the clamping part and / or the support part and the crankshaft.

[0030] The present utility model has the following advantages compared with the prior art:

[0031] 1. In the present utility model, the synchronizer is installed on the chuck, and the synchronizer is connected to the first end of the crankshaft, so that when the chuck rotates driven by the first driving part, the synchronizer and the crankshaft also rotate synchronously. The rotation of the crankshaft provides the motion basis for polishing. At the same time, compared with driving the crankshaft to rotate by a universal wheel, the error in the rotation process is reduced, and the transmission accuracy is improved; when the crankshaft axially moves during the polishing process, the elastic component buffers the axial movement of the crankshaft through its own deformation, and at the same time limits the length of the axial movement of the crankshaft. The assembly is simple, the polishing accuracy of the crankshaft is improved, and the qualified rate of the finished product is increased to more than 98%.

[0032] 2. A rubber layer is provided on the contact surface between the torsion brake block and the support block of the present utility model and the crankshaft. Since the accuracy requirements for the crankshaft journal are very high, the rubber layer can play a buffering role, increase the friction force, and prevent the crankshaft from directly contacting the torsion brake block and the support block made of metal materials from being knocked and damaged. Description of the Drawings

[0033] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0034] Figure 1 It is a schematic diagram when the synchronizer, chuck, and fixing device of the present utility model are installed at both ends of the crankshaft;

[0035] Figure 2 It is a schematic diagram of the structure of the chuck of the present utility model;

[0036] Figure 3 This is a cross-sectional view of the chuck of the present utility model;

[0037] Figure 4 This is a schematic structural view of the first centering tip of the present utility model;

[0038] Figure 5 This is a schematic structural view when the synchronizer and the crankshaft of the present utility model are connected;

[0039] Figure 6 This is a schematic structural view of the synchronizer of the present utility model;

[0040] Figure 7 This is a cross-sectional view of the synchronizer of the present utility model

[0041] Figure 8 This is a schematic structural view of the crankshaft;

[0042] Figure 9 This is a schematic structural view of the feeding mechanism of the present utility model;

[0043] Figure 10 This is a schematic structural view when the feeding mechanism clamps the crankshaft of the present utility model;

[0044] Figure 11 This is the front view and side view of the torsion brake block of the present utility model;

[0045] Figure 12 This is a schematic structural view of the support block of the present utility model.

[0046] In the figure:

[0047] 11. Elastic component; 111. Sleeve; 1111. Groove; 112. Inner tube; 113. Spring; 114. First centering tip; 12. Connecting column; 13. Chuck; 131. Chuck column; 14. Synchronizer; 141. Washer; 142. Mounting hole; 2. Fixing device; 3. Feeding mechanism; 31. Slide bar mechanism; 32. Sliding base; 33. Torsion brake block; 34. Support block; 4. Crankshaft; 41. Crankshaft inner hole; 42. Pin hole. Detailed implementation manners

[0048] In order to make the purpose, technical solutions and advantages of this application clearer, the following will further describe this application in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the protection scope of this application.

[0049] The terms used in the embodiments of the present application are for the purpose of describing specific embodiments only and are not intended to limit the present application. The singular forms "a", "the" and "said" used in the embodiments of the present application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. "Plural" generally includes at least two.

[0050] It should be understood that the term "and / or" used herein is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0051] It should be understood that although terms such as first, second, and third may be used in the embodiments of the present application for description, these descriptions should not be limited to these terms. These terms are only used to distinguish the descriptions. For example, without departing from the scope of the embodiments of the present application, the first may also be referred to as the second, and similarly, the second may also be referred to as the first.

[0052] Depending on the context, the words "if", "when" as used herein may be interpreted as "when...", "when...", "in response to determining", or "in response to detecting". Similarly, depending on the context, the phrase "if determined" or "if detected (stated condition or event)" may be interpreted as "when determined", "in response to determining", "when detected (stated condition or event)", or "in response to detecting (stated condition or event)".

[0053] It should also be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a commodity or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such commodity or device. Without further limitation, the element defined by the statement "including one..." does not exclude the existence of another identical element in the commodity or device including the said element.

[0054] It should be particularly noted that symbols and / or numbers existing in the specification, if not marked in the figure description, are not figure reference numerals.

[0055] Embodiment 1

[0056] See Figures 1-8 As shown, the engine crankshaft polishing auxiliary tool provided by the embodiment of the present application includes:

[0057] The first driving part;

[0058] The chuck 13 is provided with an elastic component 11 therein. The first end of the chuck 13 is drivingly connected to a first driving part, and the chuck 13 rotates under the drive of the first driving part.

[0059] The synchronizer 14 has its first end mounted on the second end of the chuck 13, and its second end is slidably connected to the first end of the crankshaft 4.

[0060] After the first end of the elastic component 11 extends out of the chuck 13 and passes through the synchronizer 14, it abuts against the center of the first end of the crankshaft 4. The telescopic direction of the elastic component 11 is coaxial with the crankshaft 4.

[0061] The fixing device 2 abuts against the second end of the crankshaft 4.

[0062] The synchronizer 14 is mounted on the chuck 13 and connected to the first end of the crankshaft 4, so that when the chuck 13 is driven by the first driving part to rotate, the synchronizer 14 and the crankshaft 4 also rotate synchronously. The rotation of the crankshaft provides the motion basis for polishing. At the same time, compared with the universal wheel driving the crankshaft to rotate, this solution reduces the error during the rotation process and improves the transmission accuracy. Since the fixing device 2 fixes the position of the second end of the crankshaft 4, and the chuck 13 is provided with an elastic component 11 that abuts against the first end of the crankshaft 4, when the crankshaft 4 has an axial movement during the polishing process, the crankshaft 4 moves in the direction of the synchronizer 14. The elastic component 11 buffers the axial movement of the crankshaft 4 through its own deformation, and at the same time limits the length of the axial movement of the crankshaft 4, improving the machining accuracy.

[0063] See Figures 1-8 As shown, the second end of the synchronizer 14 is slidably connected to the first end of the crankshaft 4 through a connecting column 12. The first end of the connecting column 12 is mounted on the second end of the synchronizer 14, and the second end of the connecting column 12 is connected to a pin hole 42 provided on the first end of the crankshaft 4 and slides along the axial direction of the crankshaft 4.

[0064] The connecting column 12 is provided on the synchronizer 14, and the second end of the connecting column 12 is inserted into the crankshaft pin hole 42, so that the synchronizer 14 drives the crankshaft 4 to rotate and cooperate with the polishing equipment for polishing operations. During the rotation of the crankshaft 4, axial movement will occur. Therefore, the connecting column 12 has sufficient length and the pin hole 42 has sufficient depth, that is, an axial movement margin is reserved on the connecting column 12 and the pin hole 42. When there is no axial movement, the second end of the connecting column 12 is located inside the pin hole 42 and the middle part of the connecting column 12 is located outside the pin hole 42. When axial movement occurs, the entire crankshaft 4 moves in the direction of the synchronizer 14, and the middle part of the connecting column 12 also inserts into the pin hole 42.

[0065] See Figures 3-5 As shown, the elastic component 11 includes:

[0066] The sleeve 111 is arranged in the middle of the chuck. The first end of the sleeve 111 extends out of the second end of the chuck 13, and the first end of the synchronizer 14 is sleeved on the first end of the sleeve 111.

[0067] The inner tube 112 is slidably arranged in the sleeve 111, and the first end of the inner tube 112 extends out of the first end of the sleeve 111.

[0068] The spring 113 is arranged in the sleeve 111, and both ends of the spring 113 are respectively abutted against the inner wall of the second end of the sleeve 111 and the second end of the inner tube 112.

[0069] The first centering center point 114, the first end of the first centering center point 114 is installed at the first end of the inner tube 112, and the second end of the first centering center point 114 passes through the synchronizer 14 and abuts against the first end of the crankshaft 4.

[0070] The first centering center point 114 is coaxial with the crankshaft 4. When the crankshaft moves axially, it pushes the first centering center point 14 and the inner tube 112 to slide together in the sleeve 111, so that the spring 113 is compressed, thereby playing a buffering role on the crankshaft 4 and restricting the axial movement range of the crankshaft 4.

[0071] See Figures 5-7 As shown, the synchronizer 14 is provided with a through hole for the first end of the sleeve 111, the first end of the inner tube 112 and the first centering center point 114 to pass through, and a washer 141 is arranged on the inner circumference of the through hole;

[0072] A groove 1111 is arranged at the corresponding position of the outer circumference of the first end of the sleeve 111 and the washer 141. The first end of the synchronizer 14 and the first end of the sleeve 111 are fixedly connected through the washer 141 and the groove 1111.

[0073] The synchronizer 14 is sleeved on the sleeve 111 in the chuck 13. In this embodiment, the washer 141 is made of vulcanized rubber and has a large friction force. When the washer 141 is stuck in the groove 1111, the chuck 13 can drive the synchronizer 14 to rotate.

[0074] See Figure 2 、 7 As shown, the chuck 13 is provided with a chuck column 131;

[0075] An installation hole 142 is arranged at the corresponding position of the first end of the synchronizer 14 and the chuck column 131. The chuck column 131 and the installation hole 142 are connected with a clearance fit.

[0076] The chuck column 131 is inserted into the installation hole 142, which plays a positioning role when the synchronizer 14 is installed on the chuck 13.

[0077] See Figure 1 As shown, the fixing device 2 includes:

[0078] The second centering center, and the second centering center abuts against the second end of the crankshaft 4.

[0079] A slider is connected to the second centering center. The second centering center is coaxial with the crankshaft 4. The slider can move and be locked so that the second centering center can be axially moved along the crankshaft 4 into the inner hole 41 of the second end of the crankshaft 4. After abutting against the inner wall of the inner hole 41 of the crankshaft, the slider is locked to fix the second centering center at this position.

[0080] See Figures 9-12 As shown, it further includes a feeding mechanism 3. The feeding mechanism 3 includes;

[0081] A slide bar 31, with the two ends of the slide bar 31 connected to a second driving part, and the second driving part drives the slide bar 31 to rotate;

[0082] A sliding base 32, which is slidably connected to the slide bar 31 along the axial direction of the slide bar 31;

[0083] A torsion brake block 33, with one end of the torsion brake block 33 installed on the sliding base 32, and a clamping part provided at the other end of the torsion brake block 33, and the clamping part clamps on the crankshaft 4;

[0084] A support block 34, with one end of the support block 34 installed on the sliding base 32, and a support part provided at the other end of the support block 34, and the support part supports the lower end of the crankshaft 4.

[0085] The second driving part drives the slide bar 31 to rotate so that the crankshaft 4 is sent to the polishing position under the clamping of the torsion brake block 33 and the support of the support block 34. The second driving part can be a motor, and the second driving part can also cooperate with devices such as a transmission belt and a manipulator to move the slide bar 31 in the horizontal and vertical directions. In this embodiment, there are two sliding bases 32, and the two sliding bases 32 can slide on the slide bar 31. By changing the relative distance between the two sliding bases 32, the crankshaft 4 of different lengths can be adapted. There are two support blocks 34, which are respectively arranged on the two sliding bases 32, making the feeding more stable. The torsion brake block 33 is located on one of the sliding bases 32 and has a weight-reducing hole. The clamping part is C-shaped and clamps on the journal of the crankshaft 4.

[0086] See Figures 9-12 As shown, a rubber layer is provided on the contact surface between the clamping part and / or the support part and the crankshaft 4.

[0087] Grooves are provided in the contact surface between the clamping part and / or the support part and the crankshaft 4, and rubber blocks are installed in the grooves. The material of the rubber blocks is polyurethane, avoiding damage to the crankshaft 4 caused by the torsion brake block 33 and the support block 34 made of metal material knocking against the crankshaft 4 during the feeding process.

[0088] Further, the synchronizer 14 and the chuck 13 can be set as an integral body, that is, the outer wall of the sleeve 111 is fixedly connected to the inner wall of the synchronizer.

[0089] The working process of the present utility model is as follows:

[0090] Place the crankshaft 4 to be polished into the torsion brake block 33 and the support block 34 of the feeding mechanism 3, and the feeding mechanism 3 sends the crankshaft 4 to the polishing position. Adjust the position of the fixing device 2 so that it abuts against the inner hole 41 of the second end of the crankshaft 4. Put the synchronizer 14 on the sleeve 111 on the chuck 13, and install them together on the first end of the crankshaft 4, ensuring that the second end of the connecting column 12 is inserted into the pin hole 42 of the first end of the crankshaft 4, and the first end of the elastic component 11 abuts against the inner hole 41 inside the first end of the crankshaft 4.

[0091] Start the second driving part to adjust the position of the feeding mechanism 3, so that the torsion brake block 33 and the support block 34 are separated from the crankshaft 4, and the feeding mechanism 3 returns to the initial position to convey the next crankshaft 4 to be polished. Drive the chuck 13 to rotate through the first driving part, and then drive the synchronizer 14 and the crankshaft 4 to rotate together, and cooperate with the polishing equipment to polish the crankshaft 4.

[0092] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and the key points of each embodiment are the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other. For the system or device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0093] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present application.

Claims

1. An engine crankshaft polishing aid, characterized in that: include: a first driving unit; A chuck (13), wherein an elastic component (11) is arranged in the chuck (13), a first end of the chuck (13) is drivingly connected to a first driving unit, and the chuck (13) rotates under the driving of the first driving unit; A synchronizer (14), wherein a first end of the synchronizer (14) is mounted on a second end of the chuck (13), and a second end of the synchronizer (14) is slidably connected to a first end of the crankshaft (4); After the first end of the elastic component (11) extends out of the chuck (13) and passes through the synchronizer (14), it abuts against the center of the first end of the crankshaft (4); the expansion and contraction direction of the elastic component (11) is coaxial with the crankshaft (4); A fixing device (2), wherein the fixing device (2) abuts against the second end of the crankshaft (4).

2. The engine crankshaft polishing aid according to claim 1, characterized in that: The second end of the synchronizer (14) is slidably connected to the first end of the crankshaft (4) through a connecting column (12); the first end of the connecting column (12) is installed on the second end of the synchronizer (14), and the second end of the connecting column (12) is connected to a pin hole (42) provided on the first end of the crankshaft (4) and slides axially along the crankshaft (4).

3. The engine crankshaft polishing aid according to claim 2, characterized in that: The elastic component (11) comprises: A sleeve (111), wherein the sleeve (111) is arranged in the middle of the chuck, a first end of the sleeve (111) extends out of a second end of the chuck (13), and a first end of the synchronizer (14) is sleeved on the first end of the sleeve (111); an inner tube (112), the inner tube (112) being slidably disposed in the sleeve (111), and a first end of the inner tube (112) extending out of a first end of the sleeve (111); A spring (113), wherein the spring (113) is arranged in the sleeve (111), and two ends of the spring (113) are respectively in contact with the inner wall of the second end of the sleeve (111) and the second end of the inner tube (112); A first centering point (114), wherein a first end of the first centering point (114) is mounted on a first end of the inner tube (112), and a second end of the first centering point (114) passes through the synchronizer (14) and abuts against a first end of the crankshaft (4).

4. The engine crankshaft polishing aid according to claim 3, characterized in that: The synchronizer (14) is provided with a through hole for the first end of the sleeve (111), the first end of the inner tube (112) and the first centering tip (114) to pass through, and a gasket (141) is provided on the inner periphery of the through hole; A groove (1111) is provided at a position on the outer periphery of the first end of the sleeve (111) corresponding to the washer (141), and the first end of the synchronizer (14) and the first end of the sleeve (111) are fixedly connected via the washer (141) and the groove (1111).

5. The engine crankshaft polishing aid according to claim 4, characterized in that: The chuck (13) is provided with a chuck column (131); A mounting hole (142) is provided at a position corresponding to the first end of the synchronizer (14) and the chuck column (131), and the chuck column (131) and the mounting hole (142) are connected with clearance fit.

6. The engine crankshaft polishing aid according to claim 3, characterized in that: The fixing device (2) comprises: A second centering point, wherein the second centering point abuts against the second end of the crankshaft (4).

7. The engine crankshaft polishing aid according to claim 1, characterized in that: It also includes a feeding mechanism (3), wherein the feeding mechanism (3) includes: A sliding rod (31), wherein both ends of the sliding rod (31) are connected to a second driving unit, and the second driving unit drives the sliding rod (31) to rotate; A sliding base (32), the sliding base (32) being slidably connected to the sliding rod (31) along the axial direction of the sliding rod (31); A torsion brake block (33), one end of which is mounted on the sliding base (32), and the other end of which is provided with a clamping portion, which is clamped on the crankshaft (4); A support block (34), one end of which is mounted on the sliding base (32), and the other end of which is provided with a support portion, wherein the support portion is supported on the lower end of the crankshaft (4).

8. The engine crankshaft polishing aid according to claim 7, characterized in that: A rubber layer is provided on the contact surface between the clamping portion and / or the supporting portion and the crankshaft (4).

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