Splicing type plunger pump main shaft structure

Abstract

The utility model discloses an assembly type plunger pump main shaft structure which comprises a main shaft body (1), the end portion of the main shaft body (1) is provided with an assembly type adapter (2), the adapter (2) is provided with a connecting structure (3), and the connecting structure (3) is matched with the structure of the input end of equipment driven by a plunger pump. One end of the adapter (2) is provided with a connecting structure (3), the other end of the adapter (2) is axially inserted into the body (1), the insertion end of the adapter (2) is in spline connection with the body (1), and an axial limiting mechanism is arranged between the adapter (2) and the body (1); the end of the body (1) extends outwards in the radial direction to form a reinforcing ring (4), and the length of the reinforcing ring (4) is larger than that of spline connection. The plunger pump has the advantage that the delivery cycle of the plunger pump can be shortened.

Description

Technical Field

[0001] This utility model belongs to the field of plunger pumps, and in particular relates to a plunger pump spindle structure in an assembled form. Background Technology

[0002] Piston pumps are common drive components. Current piston pumps have a single-piece spindle, machined from a single bar. The exposed end of the spindle has a connecting structure, through which the piston pump connects to the corresponding equipment, providing rotational torque for its operation. This connecting structure needs to be machined according to the structure of the equipment's input end. However, different equipment input end structures result in a variety of connecting structures, such as external splines, keyways, or stepped shafts, which are difficult to predict. Therefore, spindle production typically begins only after an order is accepted, based on customer requirements. The spindle is then assembled with other pre-stocked parts to form the finished piston pump. The order delivery cycle includes not only spindle production time but also piston pump assembly time, leading to a longer delivery period and hindering market competitiveness. Utility Model Content

[0003] The purpose of this invention is to provide an assembled plunger pump spindle structure.

[0004] This invention has the advantage of shortening the delivery cycle of plunger pumps.

[0005] The technical solution of this utility model is: a piston pump spindle structure in the form of an assembly, including a spindle body, an assembly adapter at the end of the body, a connecting structure on the adapter, and the connecting structure cooperating with the structure of the input end of the device driven by the piston pump.

[0006] In the aforementioned assembled plunger pump spindle structure, one end of the adapter is provided with a connecting structure, the other end of the adapter is axially inserted into the body, the insertion end of the adapter is splinedly connected to the body, and an axial limiting mechanism is provided between the adapter and the body.

[0007] In the aforementioned assembled plunger pump spindle structure, the end of the body extends radially outward to form a reinforcing ring, the length of which is greater than the length of the spline connection.

[0008] In the aforementioned assembled plunger pump spindle structure, the axial limiting mechanism includes an inner ring groove disposed in the inner spline hole and an outer ring groove disposed on the outer spline circumference. An elastic retaining ring is provided between the outer ring groove and the inner ring groove, and the elastic retaining ring has an opening.

[0009] In the aforementioned assembled plunger pump spindle structure, the inner spline hole of the body is chamfered.

[0010] In the aforementioned assembled plunger pump spindle structure, the main body and the adapter are in a clearance fit in the radial direction.

[0011] In the aforementioned assembled plunger pump spindle structure, an oil reservoir is provided on the end face of the insertion end of the adapter and / or on the bottom surface of the spline hole in the body, and the oil reservoir is filled with lubricating grease.

[0012] Compared to existing technologies, this invention essentially adds an assembly-type adapter to the existing spindle. The connecting structure originally located on the spindle is moved to the adapter. This allows the spindle and other parts to be assembled into a plunger pump first. Upon receiving a customer order, the corresponding connecting structure is then machined onto the adapter, which is then assembled onto the plunger pump. Since the plunger pump is essentially assembled before the order is received, the time spent machining the adapter is less than the time spent machining the entire spindle, significantly shortening the order delivery cycle and improving market competitiveness. Therefore, this invention has the advantage of shortening the delivery cycle of plunger pumps. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the elastic retaining ring.

[0015] The labels in the attached diagram are: 1-body, 2-adapter, 3-connection structure, 4-reinforcing ring, 5-inner ring groove, 6-outer ring groove, 7-elastic retaining ring, 8-opening, 9-chamfer, 10-oil reservoir. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0017] Example. A modular plunger pump spindle structure, such as... Figure 1 As shown, the body 1 includes a main shaft, which is equivalent to the main shaft on the original plunger pump. The end of the body 1 (exposed to the output end of the plunger pump) is provided with an assembled adapter 2.

[0018] One end of the adapter 2 is provided with a connecting structure 3, which is matched with the structure of the input end of the device driven by the plunger pump. The other end of the adapter 2 is axially inserted into the body 1, and the insertion end of the adapter 2 is splinedly connected to the body 1.

[0019] The end of the body 1 extends radially outward to form a reinforcing ring 4, the length of which is greater than the length of the spline connection. Because an internal spline hole is opened at the end of the body 1, the torsional resistance of the end of the body 1 decreases, so a reinforcing ring 4 is needed as an incremental supplement.

[0020] An axial limiting mechanism is provided between the adapter 2 and the main body 1. The axial limiting mechanism includes an inner ring groove 5 provided in the inner spline hole and an outer ring groove 6 provided on the outer spline circumference. An elastic retaining ring 7 is provided between the outer ring groove 6 and the inner ring groove 5. An opening 8 is provided on the elastic retaining ring 7. The elastic retaining ring 7 is made of spring steel wire.

[0021] The inner spline hole of the body 1 is provided with a chamfer 9. The chamfer 9 is provided to facilitate the assembly between the body 1 and the adapter 2.

[0022] The body 1 and the adapter 2 are radially clearance-fitted. After the plunger pump is connected to the equipment it drives, the body 1 needs to remain coaxial with the input end of the equipment. Therefore, there is a requirement for coaxiality between the external spline at one end of the adapter 2 and the connecting structure 3 at the other end. Setting the body 1 and the adapter 2 as a clearance fit allows the adapter 2 to move slightly radially after being assembled to the body 1, reducing the coaxiality requirement between the two ends of the adapter 2, thus reducing the machining accuracy requirement of the adapter 2, reducing the machining difficulty, and improving the machining pass rate.

[0023] An oil reservoir 10 is provided on the end face of the insertion end of the adapter 2 and / or on the bottom surface of the spline hole inside the body 1, and the oil reservoir 10 is filled with grease. Since the body 1 and the adapter 2 are in a clearance fit in the radial direction, after the plunger pump is connected to the equipment it drives, the body 1 and the adapter 2 will collide in the radial direction when the plunger pump is working. In order to reduce wear and improve service life, it is necessary to set up the oil reservoir 10 and inject grease.

[0024] Alternatively, the axial limiting mechanism can be a resilient pin, which radially passes through the body 1 and the adapter 2. However, using a resilient pin would create a through hole in the radial direction between the body 1 and the adapter 2, reducing the maximum torque transmission capacity.

[0025] The specific processing method is as follows: The main body 1 is prefabricated and assembled into the plunger pump. The blank of the adapter 2 is prefabricated and prepared. After receiving the customer's order, the connecting structure 3 is processed on the blank according to the structure of the input end of the equipment to be connected to the plunger pump, thus obtaining the adapter 2. Then, grease is injected into the spline hole of the main body 1, and the adapter 2 is assembled onto the main body 1. Some excess grease will overflow, and the rest of the grease will be retained between the adapter and the main body and in the oil reservoir. During assembly, the elastic retaining ring 7 is placed in the outer ring groove 6. In its free state, the inner ring of the elastic retaining ring 7 enters the outer ring groove 6, while the outer ring remains outside the outer ring groove 6. When pushed into the inner spline hole, the elastic retaining ring 7 is elastically contracted inward by the chamfer 9 and completely enters the outer ring groove 6 until the elastic retaining ring 7 reaches the inner ring groove 5. Then, the elastic retaining ring 7 expands outward, and the outer ring enters the inner ring groove 5, while the inner ring remains in the outer ring groove 6. The body 1 and the adapter 2 are axially connected through the elastic retaining ring 7.

[0026] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

Claims

1. A piston pump spindle structure in an assembled form, characterized in that: The main body (1) includes a spindle, and an assembly adapter (2) is provided at the end of the main body (1). The adapter (2) is provided with a connecting structure (3), which is compatible with the structure of the input end of the device driven by the plunger pump.

2. The assembled plunger pump spindle structure according to claim 1, characterized in that: One end of the adapter (2) is provided with a connecting structure (3), and the other end of the adapter (2) is axially inserted into the body (1). The insertion end of the adapter (2) is splinedly connected to the body (1), and an axial limiting mechanism is provided between the adapter (2) and the body (1).

3. The assembled plunger pump spindle structure according to claim 2, characterized in that: The end of the body (1) extends radially outward to form a reinforcing ring (4), and the length of the reinforcing ring (4) is greater than the length of the spline connection.

4. The assembled plunger pump spindle structure according to claim 2, characterized in that: The axial limiting mechanism includes an inner ring groove (5) disposed in the inner spline hole and an outer ring groove (6) disposed on the outer spline circumference. An elastic retaining ring (7) is provided between the outer ring groove (6) and the inner ring groove (5), and an opening (8) is provided on the elastic retaining ring (7).

5. The assembled plunger pump spindle structure according to claim 4, characterized in that: The inner spline hole of the body (1) is provided with a chamfer (9).

6. The assembled plunger pump spindle structure according to claim 2, characterized in that: The body (1) and the adapter (2) are in a clearance fit in the radial direction.

7. The assembled plunger pump spindle structure according to claim 6, characterized in that: The adapter (2) has an oil reservoir (10) on the end face of the insertion end and / or on the bottom face of the spline hole in the body (1), and the oil reservoir (10) is filled with grease.

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