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CN-117052788-B - Spliced rear end bearing seat

CN117052788BCN 117052788 BCN117052788 BCN 117052788BCN-117052788-B

Abstract

The invention relates to a spliced rear end bearing seat, which comprises a main body, wherein a crank shaft seat hole is formed in the main body, and the main body is formed by splicing an upper body and a lower body; the invention relates to a crankshaft rotation device, which comprises a main body, a crankshaft seat hole, a supporting roller, a crankshaft, a supporting roller, a spring, a crankshaft, a support mechanism and a bearing mechanism, wherein the inner end surface of the main body is provided with the dovetail groove and the two supporting mechanisms, the dovetail groove is annular, the dovetail groove and the crankshaft seat hole are coaxially arranged, and the two supporting mechanisms are symmetrically arranged left and right; when the crankshaft is arranged on the main body, the lower main body is suspended on the crankshaft through the arc-shaped strip, so that a worker can conveniently fix the lower main body and the engine without supporting the lower main body; the arc-shaped strip rotates in the dovetail groove, so that the device is suitable for mounting main bodies with different angles, and the supporting roller always supports the crankshaft.

Inventors

  • CAO NIANFENG
  • LV ZHILIN

Assignees

  • 江阴中玮动力机械有限公司

Dates

Publication Date
20260505
Application Date
20230608

Claims (10)

  1. 1. The spliced rear end bearing seat is characterized by comprising a main body (1), wherein a crank seat hole (5) is formed in the main body (1), and the main body (1) is formed by splicing an upper body (1.1) and a lower body (1.2); The inner end face (2) of the main body (1) is provided with a dovetail groove (11) and two supporting mechanisms (12), the dovetail groove (11) is annular, the dovetail groove (11) and the crankshaft seat hole (5) are coaxially arranged, and the two supporting mechanisms (12) are symmetrically arranged left and right; The supporting mechanism (12) comprises a rotating assembly (12.1) and a plurality of supporting assemblies (12.2), the rotating assembly (12.1) is positioned in the dovetail groove (11), the plurality of supporting assemblies (12.2) are circumferentially distributed by taking the axis of the crankshaft seat hole (5) as the center, and the rotating assembly (12.1) is used for driving the supporting assemblies (12.2) to rotate around the axis of the crankshaft seat hole (5); The support assembly (12.2) comprises a support plate (12.21), the support plate (12.21) is connected with the rotating assembly (12.1), one side clearance of the support plate (12.21) close to the axis of the crank seat hole (5) is provided with a support roller (12.22), the support roller (12.22) is parallel to the axis of the crank seat hole (5), moving rods (12.23) are fixedly arranged at two ends of the support roller (12.22), the axis of the moving rods (12.23) is perpendicular to and intersects with the axis of the crank seat hole (5), a first limiting disc (12.24) is fixedly arranged at one end of the moving rods (12.23), the first limiting disc (12.24) is attached to one side of the support plate (12.21) far away from the support roller (12.22), a spring (12.25) is arranged at the other side of the support plate (12.21), one end of the spring (12.25) is fixedly arranged on the support plate (12.21), and one end of the spring (12.25) is fixedly connected with one end of the moving rod (12.23).
  2. 2. The spliced rear-end bearing seat according to claim 1, wherein the upper body (1.1) and the lower body (1.2) are arranged in an up-down fit manner, and the axis of the crank seat hole (5) is positioned in the fit plane of the upper body (1.1) and the lower body (1.2).
  3. 3. The spliced rear end bearing seat according to claim 1, wherein the upper body (1.1) and the lower body (1.2) are locked through two bolts (1.3) which are symmetrically arranged left and right, a hollow locating pin (1.4) is sleeved on the bolt (1.3), one end of the locating pin (1.4) is inserted into the bottom of the upper body (1.1), and the other end of the locating pin (1.4) is inserted into the top of the lower body (1.2).
  4. 4. A spliced rear-end bearing seat according to any one of claims 1-3, characterized in that clamping grooves (12.26) are formed in each of the two movable rods (12.23), two clamping units (12.27) are arranged on the supporting plate (12.21), and the two clamping units (12.27) are in one-to-one correspondence with the two clamping grooves (12.26); The clamping unit (12.27) comprises a rotating rod (12.271), the rotating rod (12.271) is parallel to the moving rod (12.23), the rotating rod (12.271) penetrates through the supporting plate (12.21), a clamping strip (12.272) is fixedly arranged at one end, far away from the axis of the Qu Zhou hole (5), of the rotating rod (12.271), a second limiting disc (12.273) is fixedly arranged at the other end of the rotating rod (12.271), and both the second limiting disc (12.273) and the clamping strip (12.272) are attached to the supporting plate (12.21), and the clamping strip (12.272) is matched with the clamping groove (12.26).
  5. 5. The spliced rear end bearing seat according to claim 1, wherein the supporting roller (12.22) is provided with a plurality of spiral threads (12.28), and the plurality of spiral threads (12.28) are circumferentially distributed with the axis of the supporting roller (12.22) as the center.
  6. 6. The spliced rear end bearing seat according to claim 1, wherein the rotating assembly (12.1) comprises an arc-shaped strip (12.11), the arc-shaped strip (12.11) is matched with the dovetail groove (11), the arc-shaped strip (12.11) is locked with the main body (1) through a locking screw (12.12), and the supporting plate (12.21) is fixedly arranged on the arc-shaped strip (12.11).
  7. 7. The spliced rear-end bearing seat according to claim 1, wherein a plurality of reinforcing ribs (7) are arranged on the main body (1).
  8. 8. The spliced rear-end bearing seat according to claim 1, wherein the crankshaft seat hole (5) is provided with a bearing bush groove (8).
  9. 9. The spliced rear end bearing seat according to claim 1, wherein an annular oil supply groove (9) is formed in the inner wall of the crankshaft seat hole (5), an engine oil channel (10) is formed in the main body (1), and the oil supply groove (9) is communicated with a lubricating oil channel of an engine through the engine oil channel (10).
  10. 10. The spliced rear-end bearing seat according to claim 1, wherein the main body (1) is provided with a plurality of threaded holes (6).

Description

Spliced rear end bearing seat Technical Field The invention relates to a spliced rear end bearing seat, and belongs to the technical field of bearing seats. Background With the progress of the technical level of the engine, the engine has higher and higher requirements for energy conservation, consumption reduction and low-noise vibration development. For energy saving, consumption reduction and economy improvement of the engine, on one hand, the self weight of each part needs to be reduced, inertia is reduced, and on the other hand, the combustion burst pressure needs to be improved to improve the efficiency of combustion work. However, the high combustion burst pressure force must generate larger noise vibration, which affects the noise vibration performance of the engine, and how to coordinate the performance of the engine in terms of energy consumption and noise vibration is a long-felt problem for those skilled in the engine art. The tunnel engine mainly refers to a structure in which the crankshaft mounting position is in a tunnel mode, namely, after the bearing seat is assembled, the engine crankshaft is arranged in a tunnel-type crankshaft mounting seat hole of the engine in a mode of entering the tunnel. The engine body structure has good mechanical strength and positioning accuracy compared with a split type and gantry type engine body structure. Meanwhile, the rear end bearing seat of the tunnel engine is not only used as a key part for connecting a moving part and an engine body, the structural characteristics and the mechanical properties of the rear end bearing seat can seriously influence the service performance and the noise vibration performance of the engine, but also used as a supporting part of the rear end of a crankshaft of the engine, and the rear end bearing seat has the important functions of axial thrust of the crankshaft, rear end lubrication and engine oil sealing. The utility model patent with the application number of CN201521118842.3 discloses a tunnel type engine crankshaft rear bearing seat, which comprises an inner end face positioned at the inner side of an engine, an outer end face connected with an engine rear end connecting plate and positioned at the outer side of the engine, a cylinder body matching face matched with an engine cylinder body and a crankshaft seat hole matched with a crankshaft journal, wherein an outer end face lubrication oil duct is arranged around the outer end face, which is close to the crankshaft seat hole, and is in a non-closed structure, an outer end face oil return groove is arranged between the outer end face lubrication oil duct and the crankshaft seat hole, an oil return hole is arranged in the outer end face lubrication oil duct, the oil return hole penetrates through the outer end face and the inner end face, three reinforcing ribs are arranged in an inverted triangle state, impact stress transmitted by a crankshaft is absorbed, noise and vibration of the engine are effectively reduced, and the lubrication and sealing structures provide good crankshaft rear end face seal and crankshaft rear end lubrication for the engine, and service life of the engine are prolonged. However, during rotation of the crankshaft, the contact position of the crankshaft and the lower part of the bearing seat is stressed greatly due to the action of gravity, so that the abrasion is increased. Therefore, a spliced rear end bearing seat is needed to improve the uniformity of stress. Disclosure of Invention The invention aims to solve the technical problem of overcoming the defects in the prior art and providing a spliced rear end bearing seat for improving stress uniformity. The technical scheme adopted by the invention for solving the problems is that the spliced rear end bearing seat comprises a main body, wherein a crank shaft seat hole is formed in the main body, and the main body is formed by splicing an upper body and a lower body; The inner end surface of the main body is provided with a dovetail groove and two supporting mechanisms, the dovetail groove is annular, the dovetail groove and the crankshaft seat hole are coaxially arranged, the two supporting mechanisms are symmetrically arranged left and right, and the rotating assembly is used for driving the supporting assembly to rotate around the axis of the crankshaft seat hole; the supporting mechanism comprises a rotating assembly and a plurality of supporting assemblies, the rotating assembly is positioned in the dovetail groove, the plurality of supporting assemblies are circumferentially distributed by taking the axis of the crankshaft seat hole as the center, and the rotating assembly is used for driving the supporting assemblies to rotate around the axis of the crankshaft seat hole; The supporting component comprises a supporting plate, the supporting plate is connected with a rotating component, a supporting roller is arranged on one side of the supporting plate, which is close to the axis of th