Assembly type crankshaft structure

Abstract

The utility model relates to the technical field of crankshafts, in particular to an assembly type crankshaft structure. An assembly type crankshaft structure comprises a crankshaft body, the crankshaft body comprises a crankshaft connecting rod in the middle, the rear end of the crankshaft connecting rod is connected with a rear end shaft, the rear end shaft and the crankshaft connecting rod are integrally formed, an installation groove is formed in the front end of the crankshaft connecting rod, a front end shaft is fixed in the installation groove, and a balance block is installed on the side portion of the crankshaft connecting rod. The balance block and the crankshaft connecting rod are arranged in a split mode, and the balance block is fixedly connected with the crankshaft connecting rod through a locking bolt. The crankshaft body, the front end shaft and the balance block are designed into a split assembly type structure, and each part is independently machined and then assembled, so that the cost is reduced, the quality and the service life are ensured, and the machining cost of the whole crankshaft is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a crankshaft technical field especially relates to an assembly type crankshaft structure. BACKGROUND

[0002] At present, in the diaphragm compressor, the crankshaft is an important driving component, the present crankshaft, its structure is like the patent application of public no. CN215634342U, disclosed a kind of damping balance shaft's crankshaft structure, middle is crankshaft connecting rod, balance block is equipped on crankshaft connecting rod, rear end is equipped with rear end shaft, front end is equipped with front end shaft.This kind of structure's crankshaft is currently in processing, some adopt integral casting form, but the cost of casting is high, lead to the cost of entire diaphragm compressor increase;Some adopt integral forging form, although cost is reduced, but due to the front end shaft diameter is thin, forging is prone to crack, affect later life, and balance block is generally arc structure, forging difficulty is high, same economy is poor, lead to the processing cost of entire crankshaft be higher, there is no good solution to the above problems at present.

[0003] In summary, the crankshaft machining cost is high in the diaphragm compressor, and the difficulty is great, which has become a technical problem urgently to be solved in the industry. UTILITY MODEL CONTENTS

[0004] The utility model provides a kind of assembly type crankshaft structure to make up for the deficiency of prior art, solve the problem of high cost of previous crankshaft with integral casting form, solve the problem of previous crankshaft with integral forging form prone to crack and affect quality.

[0005] The utility model employs the technical scheme to solve the above technical problems:

[0006] An assembly type crankshaft structure, comprising a crankshaft body, the crankshaft body includes a middle crankshaft connecting rod, a rear end of the crankshaft connecting rod is connected with a rear end shaft, the rear end shaft is integrally formed with the crankshaft connecting rod, a front end of the crankshaft connecting rod is provided with a mounting groove, a front end shaft is fixed in the mounting groove, a balance block is installed on the side of the crankshaft connecting rod, the balance block is separately arranged with the crankshaft connecting rod, and the balance block is fixedly connected with the crankshaft connecting rod by locking bolts.

[0007] The front end shaft is interference fit and press-fitted in the mounting groove.

[0008] The front end shaft and the crankshaft connecting rod are provided with an oil passage connected therewith.

[0009] The rear end shaft and the crankshaft connecting rod are integrally forged to form.

[0010] The balance block and the crankshaft connecting rod are connected through a dovetail groove structure.

[0011] The balance block has a countersunk hole, and the locking bolt passes through the countersunk hole and connects to the threaded hole of the crankshaft connecting rod. An anti-loosening washer is provided between the locking bolt and the bottom of the countersunk hole.

[0012] The present invention adopts the above solution and has the following advantages:

[0013] By designing the crankshaft body, front-end shaft, and balance weight into a separate assembly structure, each part is processed separately and then assembled, which reduces costs while ensuring quality and service life, thus lowering the overall crankshaft processing cost. Attached image description:

[0014] Fig. 1 This is a three-dimensional structural diagram of the present invention.

[0015] Fig. 2 This is a cross-sectional view of the present invention.

[0016] Fig. 3 This is a longitudinal section diagram of the present invention.

[0017] In the diagram, 1 is the crankshaft connecting rod, 2 is the rear end shaft, 3 is the mounting groove, 4 is the front end shaft, 5 is the balance block, 6 is the locking bolt, 7 is the oil passage, 8 is the dovetail groove structure, 9 is the countersunk hole, and 10 is the anti-loosening washer. Detailed implementation method:

[0018] To clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0019] like Figs. 1-3 As shown, an assembled crankshaft structure includes a crankshaft body, the crankshaft body including a central crankshaft connecting rod 1, a rear end shaft 2 connected to the rear end of the crankshaft connecting rod 1, the rear end shaft 2 being integrally formed with the crankshaft connecting rod 1, a mounting groove 3 being provided at the front end of the crankshaft connecting rod 1, a front end shaft 4 being fixed in the mounting groove 3, a balance block 5 being installed on the side of the crankshaft connecting rod 1, the balance block 5 being separately set from the crankshaft connecting rod 1, and the balance block 5 being fixedly connected to the crankshaft connecting rod 1 by locking bolts 6.

[0020] The front end shaft 4 is press-fitted into the mounting groove 3 with an interference fit, which can quickly connect the front end shaft 4 to the crankshaft connecting rod 1, and is easy to disassemble and replace.

[0021] The front end shaft 4 and the crankshaft connecting rod 1 are provided with interconnected oil passages 7 to facilitate the entry and exit of lubricating oil.

[0022] The rear shaft 2 and the crankshaft connecting rod 1 are integrally forged, which is easy to forge and economical.

[0023] The balance block 5 is connected with the crank connecting rod 1 through the dovetail groove structure 8, so that the connection between the balance block 5 and the crank connecting rod 1 is more firm, and loosening is avoided.

[0024] The balance block 5 is provided with a counterbore 9, the locking bolt 6 is connected with the threaded hole of the crank connecting rod 1 through the counterbore 9, the locking bolt 6 and the bottom of the counterbore 9 are provided with a lock washer 10, so that loosening of the locking bolt 6 is avoided, and the balance block 5 and the crank connecting rod 1 are fixed through two locking bolts 6 respectively.

[0025] Working principle:

[0026] During machining, the rear end shaft 2 and the crank connecting rod 1 are integrally forged into a shape, the shaft diameters of the two are large, the shapes are relatively regular, forging difficulty is low, and economy is good, the front end shaft 4 and the balance block 5 are separately machined, and can be machined by selecting casting or forging according to needs, and then assembled after machining is completed, during assembly, the front end shaft 4 is press-fitted in the mounting groove 3 at the front end of the crank connecting rod 1 in interference fit, the balance block 5 and the crank connecting rod 1 are connected through the dovetail groove structure 8 first, then the locking bolt 6 is connected with the threaded hole of the crank connecting rod 1 through the counterbore 9 in the balance block 5, the balance block 5 and the crank connecting rod 1 are fixed, and the assembly of the whole crankshaft is completed.

[0027] The above embodiment cannot be used as a limitation on the protection scope of the utility model, and any alternative improvement or change made by the person skilled in the art to the embodiment of the utility model falls within the protection scope of the utility model.

[0028] The parts not described in the utility model are the known technology of the person skilled in the art.

Claims

1. A modular crankshaft structure, characterized by: The application relates to a crankshaft body, which comprises a middle crank connecting rod, a rear end shaft connected to the rear end of the crank connecting rod, a front end shaft fixed in an installation groove in the front end of the crank connecting rod, and a balance block fixed to the side of the crank connecting rod.

2. An assembled crankshaft structure according to claim 1, characterized in that: The front end shaft is press-fitted in the installation groove in an interference fit.

3. The fabricated crankshaft structure of claim 1, wherein: The front end shaft and the crank connecting rod are provided with an oil passage connected therewith.

4. The fabricated crankshaft structure of claim 1, wherein: The rear end shaft and the crank connecting rod are integrally forged.

5. The fabricated crankshaft structure of claim 1, wherein: The balance block and the crank connecting rod are connected through a dovetail groove structure.

6. The fabricated crankshaft structure of claim 1, wherein: The balance block is provided with a counterbore, a locking bolt is connected to a threaded hole of the crank connecting rod through the counterbore, and a lock washer is arranged between the locking bolt and the bottom of the counterbore.

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