Crankshaft precision grinding link neck outer circle follow-up clamp for high-pressure cleaning pump

Abstract

The utility model discloses a kind of crankshaft precision grinding connecting rod neck outer circle follow-up fixture for high-pressure cleaning pump, it is related to crankshaft fixture technical field.The utility model, including first eccentric sleeve and second eccentric sleeve and high-pressure cleaning pump crankshaft, the top surface of first eccentric sleeve and second eccentric sleeve is all provided with threaded through-hole, and second locking nut is inserted with thread in threaded through-hole, to be used to the end of high-pressure cleaning pump crankshaft is fixed in the inside of first eccentric sleeve and second eccentric sleeve.The utility model, by the accurate positioning of eccentric indexing core and indexing bolt, three connecting rod neck eccentricity can be controlled in 0.01mm range, angle error is controlled within ±0.05 °, ensure machining precision, eccentric indexing core is cooperated with first eccentric sleeve and second eccentric sleeve, and accurate positioning is realized by indexing bolt and insertion pin hole insertion;By the design of eccentric indexing core avoids in crankshaft end face pre-machining eccentric center hole, to prevent center hole interference problem, especially suitable for the machining of small eccentricity crankshaft.

Description

Technical Field

[0001] This utility model relates to the field of crankshaft clamping technology, specifically to a crankshaft precision grinding connecting rod neck outer circle follower clamp for high pressure cleaning pumps. Background Technology

[0002] High-pressure cleaning pumps with eccentric crankshafts are widely used in industrial production, such as in chemical plants, thermal power plants, sugar mills, and paper mills for cleaning heat exchangers, reactors, and various pipelines. They can also be used for cleaning various vehicles, aircraft, and ships. The crankshaft-type high-pressure cleaning pump uses power to drive the crankshaft to rotate. The crankshaft, through the eccentric rotation of the connecting rod, drives the plunger to reciprocate, thus achieving the pump function. In terms of machining technology, eccentric crankshaft machining presents certain technical difficulties, especially the precision grinding of the outer diameter of the connecting rod journal with three eccentric points. This is a challenging and crucial element in crankshaft manufacturing. Conventionally, during crankshaft machining, three eccentric holes are drilled on the end face of the crankshaft to fit the grinding machine's center. However, this method is not suitable for crankshafts with an eccentricity of 1.6-3.0 mm.

[0003] To address this, a crankshaft precision grinding connecting rod neck outer circle follower fixture for high-pressure cleaning pumps is proposed. Summary of the Invention

[0004] The purpose of this utility model is to provide a crankshaft precision grinding connecting rod neck outer circle follower clamp for high pressure cleaning pump in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0006] A crankshaft precision grinding connecting rod journal outer diameter follower fixture for a high-pressure cleaning pump includes a first eccentric sleeve, a second eccentric sleeve, and a high-pressure cleaning pump crankshaft. The top surfaces of both the first and second eccentric sleeves have threaded through holes, and a second locking nut is threaded into the threaded through hole to fix the end of the high-pressure cleaning pump crankshaft inside the first and second eccentric sleeves. The end faces of the first and second eccentric sleeves have three sets of annularly spaced pin holes. The end faces of both the first and second eccentric sleeves also have threaded recesses, and an eccentric indexing core is fitted to the end faces of both sleeves. The eccentric indexing core is fixed by the first locking nut threaded into the threaded recess and threaded through hole. An indexing pin is inserted into the eccentric indexing core and the pin hole.

[0007] Furthermore, the end face of the eccentric indexing core is provided with an eccentric center hole to accommodate the center of the grinding machine.

[0008] Furthermore, the surface of the eccentric indexing core is provided with vent holes.

[0009] Furthermore, the bottom surfaces of the first and second eccentric sleeves are planar, so that they can be placed on a horizontal platform before processing.

[0010] Furthermore, the three sets of pin holes on the end faces of the first eccentric sleeve and the second eccentric sleeve are evenly arranged at 120 degrees, and the three sets of pin holes are marked with 1#, 2# and 3# respectively.

[0011] Furthermore, when the first connecting rod journal, the second connecting rod journal, and the third connecting rod journal on the crankshaft surface of the high-pressure cleaning pump are precision ground, their indexing pins are respectively inserted into the pin holes of #1, #2, and #3.

[0012] The beneficial effects of this utility model are as follows:

[0013] By precisely positioning the eccentric indexing core and indexing pin, the eccentricity of the three-link neck can be controlled within 0.01mm, and the angle error can be controlled within ±0.05°, ensuring machining accuracy. The eccentric indexing core cooperates with the first eccentric sleeve and the second eccentric sleeve, and precise positioning is achieved by inserting the indexing pin and the pin hole.

[0014] The design of the eccentric indexing core avoids the need to pre-machine the eccentric center hole on the crankshaft end face, thereby preventing the center hole interference problem, which is particularly suitable for machining crankshafts with small eccentricity.

[0015] The planar bottom surfaces of the first and second eccentric sleeves ensure stability and accuracy when installing the crankshaft of the high-pressure cleaning pump before processing, simplifying the operation process and improving processing efficiency, making it particularly suitable for mass production.

[0016] By inserting the indexing pins into the holes of pins #1, #2, and #3, the precise positioning of each connecting rod journal of the high-pressure cleaning pump crankshaft is ensured during the grinding process, thereby achieving high-precision machining. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a side view of the present invention;

[0019] Figure 3 This is a front sectional view of the present invention;

[0020] Figure 4 This is a partial exploded view of this utility model;

[0021] Figure 5 This is a schematic diagram of the first eccentric sleeve of this utility model;

[0022] Figure 6 This is a schematic diagram of the crankshaft of the high-pressure cleaning pump of this utility model;

[0023] Reference numerals: 1. First eccentric sleeve; 11. Threaded through hole; 12. Threaded recessed hole; 2. Second eccentric sleeve; 3. High-pressure cleaning pump crankshaft; 31. First connecting rod neck; 32. Second connecting rod neck; 33. Third connecting rod neck; 4. Pin hole; 5. Eccentric indexing core; 6. Eccentric center hole; 7. First lock nut; 8. Indexing pin; 9. Second lock nut. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0027] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. 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.

[0028] like Figures 1 to 6As shown, a crankshaft precision grinding connecting rod neck outer circle follower fixture for a high-pressure cleaning pump includes a first eccentric sleeve 1, a second eccentric sleeve 2, and a high-pressure cleaning pump crankshaft 3. The top surfaces of the first eccentric sleeve 1 and the second eccentric sleeve 2 are each provided with a threaded through hole 11, and a second locking nut 9 is inserted into the threaded through hole 11 to fix the end of the high-pressure cleaning pump crankshaft 3 inside the first eccentric sleeve 1 and the second eccentric sleeve 2. The end faces of the first eccentric sleeve 1 and the second eccentric sleeve 2 are provided with three sets of pin holes 4 arranged in annular intervals. The end faces of the first eccentric sleeve 1 and the second eccentric sleeve 2 are each provided with a threaded recessed hole 12, and an eccentric indexing core 5 is attached to the end faces of the first eccentric sleeve 1 and the second eccentric sleeve 2. The eccentric indexing core 5 is fixed by the first locking nut 7 being threadedly inserted into the eccentric indexing core 5 and the threaded recessed hole 12. An indexing pin 8 is inserted into the eccentric indexing core 5 and the inside of the pin hole 4. More specifically, the first eccentric sleeve 1 and the second eccentric sleeve 2 respectively mate with the main journals at both ends of the high-pressure cleaning pump crankshaft 3, and the high-pressure cleaning pump crankshaft 3 is fixed in the first eccentric sleeve 1 and the second eccentric sleeve 2 by threaded insertion of the second locking nut 9 into the threaded through hole 11, so as to realize the machining of the corresponding connecting rod journal on the high-pressure cleaning pump crankshaft 3, ensuring a precise fit clearance of 0.005-0.01mm. The indexing pin 8 is inserted into the corresponding pin hole 4 on the end face of the eccentric indexing core 5 and the first eccentric sleeve 1. The first locking nut 7 limits the engagement of the eccentric indexing core 5 with the first eccentric sleeve 1 and the second eccentric sleeve 2, ensuring that the eccentric indexing core 5 can rotate flexibly and be precisely positioned on the end faces of the first eccentric sleeve 1 and the second eccentric sleeve 2. The indexing pin 8 is inserted into the pin holes 4 of the eccentric indexing core 5 and the first eccentric sleeve 1 and the second eccentric sleeve 2, so as to realize the precise positioning and grinding of the three connecting rod journal of the high-pressure cleaning pump crankshaft 3.

[0029] The end face of the eccentric indexing core 5 is provided with an eccentric center hole 6 to accommodate the center of the grinding machine. More specifically, during the grinding process, the center of the grinding machine is inserted into the eccentric center hole 6 on the surface of the eccentric indexing core 5 to ensure the stability and precise positioning of the crankshaft during the grinding process.

[0030] The eccentric indexing core 5 has vent holes on its surface. More specifically, the eccentric indexing core 5 has vent holes on its surface to discharge coolant and debris generated during the grinding process.

[0031] The bottom surfaces of the first eccentric sleeve 1 and the second eccentric sleeve 2 are planar to allow for placement on a horizontal platform before machining. More specifically, the planar bottom surfaces of the first eccentric sleeve 1 and the second eccentric sleeve 2 improve the stability and accuracy when installing the high-pressure cleaning pump crankshaft 3 before machining.

[0032] The three sets of pin holes 4 on the end faces of the first eccentric sleeve 1 and the second eccentric sleeve 2 are evenly arranged at 120 degrees, and the three sets of pin holes 4 are marked with 1#, 2#, and 3# respectively. More specifically, this arrangement ensures that the indexing pins 8 can be positioned in different pin holes 4 respectively, realizing the precise positioning and grinding of the three-link journal of the crankshaft 3 of the high-pressure cleaning pump. The markings corresponding to each set of pin holes 4 facilitate quick identification and operation by the operator.

[0033] When the first connecting rod neck 31, the second connecting rod neck 32, and the third connecting rod neck 33 on the surface of the high-pressure cleaning pump crankshaft 3 are precision ground, their indexing pins 8 are respectively inserted into the pin holes 4 of #1, #2, and #3. More specifically, by positioning the indexing pins 8 with the pin holes 4 of #1, #2, and #3, the precise positioning of each connecting rod neck of the high-pressure cleaning pump crankshaft 3 during the grinding process is ensured, thereby achieving high-precision machining.

[0034] In summary: The first eccentric sleeve 1 and the second eccentric sleeve 2 respectively mate with the main journals at both ends of the high-pressure cleaning pump crankshaft 3, and the high-pressure cleaning pump crankshaft 3 is fixed in the first eccentric sleeve 1 and the second eccentric sleeve 2 by threaded insertion of the second locking nut 9 into the threaded through hole 11, so as to realize the machining of the corresponding connecting rod journal on the high-pressure cleaning pump crankshaft 3, ensuring a precise fit clearance of 0.005-0.01mm. The indexing pin 8 is inserted into the corresponding pin hole 4 on the end face of the eccentric indexing core 5 and the first eccentric sleeve 1. The first locking nut 7 limits the engagement of the eccentric indexing core 5 with the first eccentric sleeve 1 and the second eccentric sleeve 2, ensuring that the eccentric indexing core 5 can rotate flexibly and be precisely positioned on the end faces of the first eccentric sleeve 1 and the second eccentric sleeve 2. The indexing pin 8 is inserted into the pin holes 4 of the eccentric indexing core 5 and the first eccentric sleeve 1 and the second eccentric sleeve 2, so as to realize the precise positioning and grinding of the three connecting rod journal of the high-pressure cleaning pump crankshaft 3.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A crankshaft precision-ground connecting rod neck outer diameter follower fixture for a high-pressure cleaning pump, characterized in that, The assembly includes a first eccentric sleeve (1), a second eccentric sleeve (2), and a high-pressure cleaning pump crankshaft (3). The top surfaces of both the first eccentric sleeve (1) and the second eccentric sleeve (2) are provided with threaded through holes (11), and a second locking nut (9) is threaded into the threaded through hole (11) to fix the end of the high-pressure cleaning pump crankshaft (3) inside the first eccentric sleeve (1) and the second eccentric sleeve (2). The end faces of the first eccentric sleeve (1) and the second eccentric sleeve (2) have three sets of... The pin holes (4) are arranged in a ring and are equidistant. The end faces of the first eccentric sleeve (1) and the second eccentric sleeve (2) are provided with threaded recesses (12). The end faces of the first eccentric sleeve (1) and the second eccentric sleeve (2) are fitted with eccentric indexing cores (5). The eccentric indexing cores (5) are fixed by the first locking nut (7) being threaded into the eccentric indexing cores (5) and the threaded recesses (12). The eccentric indexing cores (5) and the pin holes (4) are fitted with indexing pins (8).

2. The crankshaft precision grinding connecting rod neck follower fixture for a high-pressure cleaning pump according to claim 1, characterized in that, The end face of the eccentric indexing core (5) is provided with an eccentric center hole (6) to fit the center of the grinding machine.

3. The crankshaft precision grinding connecting rod neck follower fixture for a high-pressure cleaning pump according to claim 1, characterized in that, The surface of the eccentric indexing core (5) is provided with an exhaust hole.

4. The crankshaft precision grinding connecting rod neck outer circle follower fixture for a high-pressure cleaning pump according to claim 1, characterized in that, The bottom surfaces of the first eccentric sleeve (1) and the second eccentric sleeve (2) are planar, so that they can be placed on a water platform before processing.

5. A crankshaft precision grinding connecting rod neck follower fixture for a high-pressure cleaning pump according to claim 1, characterized in that, The three sets of pin holes (4) on the end faces of the first eccentric sleeve (1) and the second eccentric sleeve (2) are evenly arranged at 120 degrees, and the three sets of pin holes (4) are marked with 1#, 2# and 3# respectively.

6. The crankshaft precision grinding connecting rod neck follower fixture for a high-pressure cleaning pump according to claim 5, characterized in that, When the first connecting rod neck (31), the second connecting rod neck (32) and the third connecting rod neck (33) on the surface of the crankshaft (3) of the high-pressure cleaning pump are precision ground, their indexing pins (8) are respectively inserted into the pin holes (4) of #1, #2 and #3.

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