Integrated follow-up eccentric frame

Abstract

The utility model discloses an integrated follow-up eccentric frame which comprises a follow-up ring and a pressing plate, the upper portion in the follow-up ring and the top of the pressing plate are provided with semicircular structures matched with each other and are connected in a fastened mode through bolts, a pair of semicircular structures form a complete round hole used for supporting the shaft diameter of a crankshaft, and a web plate is installed in the follow-up ring and located below the pressing plate. A pair of auxiliary supporting mechanisms is symmetrically installed on the web plate, and the upper ends of the pair of auxiliary supporting mechanisms are inclined towards the circle center of the follow-up ring. The integrated follow-up eccentric frame relates to the technical field of compressor crankshaft machining, through the unique structural design, the cylindricity requirement that the crankshaft turning diameter is not larger than 0.02 mm can be met; the machining precision can reach IT4-IT5 level, a complete round hole formed by the follow-up ring and the pressing plate is used for supporting the shaft diameter of the crankshaft, a stable and reliable supporting foundation is provided for grinding machining, and the problem that cylindricity is out of tolerance due to unstable supporting is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of compressor crankshaft processing technology, specifically an integrated follower eccentric frame. Background Technology

[0002] Against the backdrop of the booming development of my country's large-scale equipment manufacturing industry, crankshaft parts are moving towards larger size and higher precision, which puts forward higher requirements for processing equipment. When grinding the outer diameter of the crankshaft bend, there is an eccentricity between the crankshaft bend and the shaft diameter. This makes the rotation center line different when grinding different bends, which is significantly different from other shaft workpieces. At the same time, the crankshaft itself has poor rigidity and is subject to deflection deformation. During the grinding process of the bend, the middle part is difficult to obtain effective auxiliary support, resulting in uneven cutting parameters and ultimately causing the bend cylindricity to exceed the tolerance.

[0003] Excessive tolerance in the cylindricity of the bend can lead to many adverse effects:

[0004] Poor lubrication: Excessive cylindricity will alter the fit clearance between the connecting rod big end bearing and the crankshaft bevel. If the clearance is too large, it will cause lubricating oil leakage, reduce the pressure of the lubrication system, and affect normal oil circuit lubrication.

[0005] Increased wear: Excessive cylindricity alters the contact pattern between the connecting rod big end bearing and the crankshaft bore, increasing local contact stress, accelerating wear on the crankshaft bore and bearing, shortening their service life, and the metal debris generated by wear can also enter other moving parts through the lubricating oil, leading to wear on more components.

[0006] Impact on operational stability: Out-of-tolerance crankshaft diameter can cause uneven distribution of rotating mass, resulting in vibration and noise.

[0007] Therefore, it is crucial to design a device that can reduce the cylindricity error of the crankshaft's turning diameter. This integrated follower eccentric frame was developed based on this requirement. Utility Model Content

[0008] To address the shortcomings of existing technologies, this utility model provides an integrated follow-up eccentric frame, which solves the existing problems.

[0009] To achieve the above objectives, this utility model is implemented through the following technical solution: an integrated follower eccentric frame, including a follower ring and a pressure plate. The upper part of the follower ring and the top of the pressure plate are provided with matching semi-circular structures and are fastened together by bolts. The pair of semi-circular structures form a complete circular hole for supporting the crankshaft diameter. A web plate is installed inside the follower ring and below the pressure plate. A pair of auxiliary support mechanisms are symmetrically installed on the web plate. The upper ends of the pair of auxiliary support mechanisms are inclined towards the center of the follower ring.

[0010] Preferably, the auxiliary support mechanism includes an adjusting seat connected to the web plate, an adjusting screw rotatably mounted inside the adjusting seat, a movable seat slidably connected to the adjusting screw and the upper end of the movable seat rotatably mounted with a bearing.

[0011] Preferably, the connection between the pressure plate and the follower ring is provided with a stop that matches each other.

[0012] Preferably, the web is a semi-circular plate structure and has multiple weight-reducing holes.

[0013] Preferably, the lower part of the follower ring is integrally formed with a base plate, and the base plate is connected to the web plate by bolts.

[0014] Beneficial effects

[0015] This utility model provides an integrated follow-up eccentric frame, which has the following beneficial effects:

[0016] The integrated follower eccentric bracket, through its unique structural design, can meet the cylindricity requirement of crankshaft turning diameter not exceeding 0.02mm, and the machining accuracy can reach IT4-IT5 level. The complete circular hole formed by the follower ring and the pressure plate is used to support the crankshaft diameter, providing a stable and reliable support foundation for grinding, and effectively reducing the problem of cylindricity deviation caused by unstable support.

[0017] The adjusting screw of the auxiliary support mechanism works in conjunction with the adjusting seat. By rotating the adjusting screw, the moving seat can slide within the adjusting seat, thereby adjusting the bearing position and achieving flexible auxiliary support for the crankshaft diameter.

[0018] The follower ring, pressure plate, web plate and other components are fastened together by bolts, and the structure is compact. The stop design at the connection between the pressure plate and the follower ring enhances the stability and accuracy of the connection, ensuring that the entire eccentric frame will not loosen or shift during the grinding process, thus guaranteeing the support accuracy.

[0019] The web plate adopts a semi-circular plate structure and is equipped with multiple weight-reducing holes, which reduces the weight of the eccentric frame while ensuring structural strength, thereby reducing material costs and facilitating installation and operation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a side view of the structure of this utility model.

[0022] Figure 3 This is a schematic diagram of the structure of the follower ring of this utility model.

[0023] Figure 4 This is a schematic diagram of the web structure of this utility model.

[0024] In the diagram: 1. Follower ring; 2. Web plate; 3. Pressure plate; 4. Adjusting seat; 5. Adjusting screw; 6. Bearing. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-4 This utility model provides a technical solution: an integrated follower eccentric frame, including a follower ring 1 and a pressure plate 3. The upper part of the follower ring 1 and the top of the pressure plate 3 are provided with matching semi-circular structures and are fastened together by bolts. The pair of semi-circular structures form a complete circular hole for supporting the crankshaft diameter. A web plate 2 is installed inside the follower ring 1 and below the pressure plate 3. A pair of auxiliary support mechanisms are symmetrically installed on the web plate 2. The upper ends of the pair of auxiliary support mechanisms are inclined towards the center of the follower ring 1.

[0027] By adopting the above technical solution, the follower ring 1 and the pressure plate 3 are fastened together with bolts through the matching semi-circular structure at the top, forming a complete circular hole for supporting the crankshaft diameter. The web plate 2 is installed below the pressure plate 3 inside the follower ring 1, and a pair of auxiliary support mechanisms are symmetrically installed on its upper part, with the upper end of the mechanism inclined towards the center of the follower ring 1, to provide auxiliary support for the crankshaft.

[0028] In this embodiment, the auxiliary support mechanism includes an adjustment seat 4 connected to the web plate 2, an adjustment screw 5 is rotatably installed inside the adjustment seat 4, a movable seat is screwed onto the adjustment screw 5 and slidably connected to the inside of the adjustment seat 4, and a bearing 6 is rotatably installed on the upper end of the movable seat.

[0029] By adopting the above technical solution, the adjusting seat 4 is connected to the web plate 2, the adjusting screw 5 rotates in the adjusting seat 4, and the moving seat slides inside the adjusting seat 4 through the threaded transmission. The bearing 6 rotatably installed at the upper end of the moving seat contacts the crankshaft, thereby realizing the adjustment of the crankshaft support position.

[0030] In this embodiment, the pressure plate 3 and the follower ring 1 are further configured to have a stop that cooperates with each other.

[0031] By adopting the above technical solution, the stop at the connection between the pressure plate 3 and the follower ring 1 cooperates with each other, which enhances the stability and accuracy of the connection between the follower ring 1 and the pressure plate 3.

[0032] In this embodiment, the web plate 2 is further configured as a semi-circular plate structure and is provided with multiple weight-reducing holes.

[0033] By adopting the above technical solution, the overall weight can be reduced by setting multiple weight-reducing holes while ensuring structural strength.

[0034] In this embodiment, the lower part of the follower ring 1 is integrally formed with a base plate, and the base plate and the web plate 2 are connected by bolts.

[0035] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly described below.

[0036] Example:

[0037] This device is suitable for crankshaft grinding machines. When grinding crankshaft bevels, the crankshaft bevel is supported and positioned by an eccentric frame to improve the cylindricity of the crankshaft bevel. Its structure consists of four parts: a follower support ring mechanism, a ring support seat mechanism, a crankshaft auxiliary support mechanism, and a liner.

[0038] The follower support ring mechanism consists of a follower ring 1, a pressure plate 3, a web plate 2, and bolts. This eccentric frame is an integral piece. Both the follower ring 1 and the pressure plate 3 have a semi-circular structure. The pressure plate 3 is fitted with a stop and fastened with bolts to form an integral part with the follower ring 1, constituting the upper half of the follower ring 1. The two semicircles form a complete circular hole, which is used to support the crankshaft diameter. The web plate 2 is a semi-circular plate with a weight-relief hole. It is connected with bolts to form an integral part with the follower ring 1, constituting the lower half of the follower ring 1.

[0039] The ring support base mechanism consists of a base, a lead screw and slider transmission mechanism, and a support wheel assembly. The lower end of the base is positioned in conjunction with the machine tool guide rail. By rotating the handwheel, the linear motion of the lead screw and slider mechanism inside the base is converted into linear motion, which drives the opposing and opposite movements of the two support wheels. The two support wheels adopt a high-low design.

[0040] The auxiliary support mechanism consists of an adjusting screw 5, an adjusting seat 4, and a bearing 6. There are two parts to the mechanism. The crankshaft diameter is achieved through the transmission of the threaded pair. It serves as a buffer support before the installation of the pressure plate 3.

[0041] The liner consists of a pair (two semi-circular tiles), which are made according to the crankshaft diameter and are used to clamp the crankshaft diameter. When the two semi-circular tiles are clamped, their end faces cannot contact each other.

[0042] The ring support mechanism mentioned above is a common structure for machine tool accessories, so it is not shown in the attached drawings of this patent. Since the follower ring itself has a semi-circular structure, it can form a complete circular structure with the pressure plate, so it is called an integrated type.

[0043] During machining, the eccentricity of the eccentric frame is pre-machined according to the crankshaft drawings. The machining accuracy of each component, such as follower ring 1, pressure plate 3, web plate 2, and auxiliary support mechanism, is checked to ensure that the cylindricity of follower ring 1 is controlled within 0.015mm.

[0044] Install the liner (a pair of semi-circular liner) into the circular hole formed by the follower ring 1 and the pressure plate 3 according to the crankshaft diameter. Note that the end faces of the two semi-circular liner should not touch when they are clamped. Place the crankshaft on the liner so that the crankshaft diameter fits the liner.

[0045] The assembled crankshaft and the integrated eccentric frame are clamped onto the eccentric fixtures on both sides of the machine tool, ensuring that the grinding wheel side is adjacent to the lower end of the ring support seat, so that the outer circle of the follower ring 1 is positioned in conjunction with the outer circle of the bearing of the ring support seat, and its posture in the vertical direction is adjusted according to the end face of the follower ring 1. By adjusting the bearings 6 of the ring support seats on both sides, the radial runout of the follower ring 1 is controlled within 0.02mm.

[0046] When grinding other bends is required, loosen pressure plate 3. At this time, the crankshaft is temporarily supported on the outer circle of bearing 6 of the auxiliary support mechanism. After adjusting the crankshaft angle, realign it to ensure accurate positioning. After re-clamping and tightening, continue grinding other bends until all bends are ground.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0048] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An integrated follow-up eccentric frame, characterized in that, The device includes a follower ring (1) and a pressure plate (3). The upper part of the follower ring (1) and the top of the pressure plate (3) are provided with matching semi-circular structures and are fastened together by bolts. The pair of semi-circular structures form a complete circular hole for supporting the crankshaft diameter. A web plate (2) is installed inside the follower ring (1) and below the pressure plate (3). A pair of auxiliary support mechanisms are symmetrically installed on the web plate (2). The upper ends of the pair of auxiliary support mechanisms are inclined towards the center of the follower ring (1).

2. The integrated follower eccentric frame according to claim 1, characterized in that, The auxiliary support mechanism includes an adjustment seat (4) connected to the web (2), an adjustment screw (5) is rotatably installed inside the adjustment seat (4), a movable seat is screwed onto the adjustment screw (5) and slidably connected to the inside of the adjustment seat (4), and a bearing (6) is rotatably installed on the upper end of the movable seat.

3. The integrated follower eccentric frame according to claim 2, characterized in that, The pressure plate (3) and the follower ring (1) are provided with a stop that fits between them.

4. The integrated follower eccentric frame according to claim 3, characterized in that, The web (2) is a semi-circular plate structure and is provided with multiple weight-reducing holes.

5. The integrated follower eccentric frame according to claim 4, characterized in that, The lower part of the follower ring (1) is integrally formed with a base plate, and the base plate is connected to the web plate (2) by bolts.

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