Eccentricity adjusting structure and eccentric bushing

Abstract

The utility model relates to the technical field of eccentric bushings, and discloses an eccentricity adjusting structure and an eccentric bushing, the eccentricity adjusting structure comprises a mounting cover, a gear, a pressing plate and a positioning screw rod, the mounting cover is provided with a straight notch, and one side in the straight notch is provided with a straight rack which is transversely arranged; the gear is located in the straight notch and meshed with the spur rack, the gear is fixedly connected with the shaft rod, the position of the gear relative to the mounting cover is adjusted through meshing of the gear and the spur rack, then the distance between the shaft rod and the center of the eccentric sleeve is adjusted, and the eccentricity is adjusted; the pressing plate is used for limiting the gear in a space defined by the mounting cover and the pressing plate; and the positioning screw rod is used for positioning and fixing the gear on the mounting cover. According to the eccentricity adjusting structure and the eccentric sleeve, high-precision, convenient and repeatable eccentricity adjustment is achieved, and reliable connection, stable positioning and simple and convenient operation are guaranteed through the unique component connection, positioning, fixing and mounting modes of the eccentricity adjusting structure and the eccentric sleeve.

Description

TECHNICAL FIELD

[0001] The utility model belongs to eccentric sleeve technical field, specifically relates to a eccentricity adjusting structure and eccentric sleeve. BACKGROUND

[0002] In many mechanical devices, eccentric mechanisms are widely used, such as engines, compressors, vibration devices, etc. The core of the eccentric mechanism is to achieve specific motion and function by changing the eccentricity, and different working scenes have different requirements for the size and adjustment accuracy of the eccentricity.

[0003] Traditional eccentricity adjustment methods are often complex, requiring a large number of tools and cumbersome operation steps. For example, some use gasket adjustment methods, which require repeated increases and decreases in gasket thickness to achieve the desired eccentricity. This method not only cannot guarantee the adjustment accuracy, but also is inefficient and not suitable for frequent adjustment. In addition, some eccentric adjustment structures are difficult to stably maintain the adjusted eccentricity after adjustment, and the eccentricity may change during device operation due to factors such as vibration, affecting the normal operation and working accuracy of the device.

[0004] With the continuous development of industrial technology, higher requirements are placed on the accuracy, convenience and stability of eccentricity adjustment. Therefore, it is of great practical significance to develop an eccentricity adjustment structure that can accurately and conveniently adjust the eccentricity and stably maintain it after adjustment. INVENTION CONTENTS

[0005] The present application aims to solve the problems of low adjustment accuracy and complex operation in the existing eccentricity adjustment technology, which cannot meet the high-precision and frequent adjustment requirements.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] An eccentricity adjustment structure, comprising:

[0008] A mounting cover with semicircular structures at both ends and a straight slot opening on it, with a straight rack horizontally arranged on one side of the straight slot; the center of the semicircular part at one end of the mounting cover is located at the center of the eccentric sleeve, and the semicircular part at the other end is arranged close to the outer edge of the eccentric sleeve;

[0009] A gear located in the straight slot and engaged with the straight rack, the gear is fixedly connected with the shaft rod, and the position of the gear relative to the mounting cover is adjusted through the engagement of the gear and the straight rack, thereby adjusting the distance between the shaft rod and the center of the eccentric sleeve, and further adjusting the eccentricity;

[0010] A pressing plate for limiting the gear in the space surrounded by the mounting cover and the pressing plate;

[0011] Positioning screw rod is used for positioning and fixing the gear on the mounting cover.

[0012] As preferred, the inner side of the gear is fixed with a limiting ring, and the top end of the gear is integrally formed with an annular ring arranged through the straight slot hole A on the pressing plate, the annular ring is provided with a rectangular slot communicated with the center hole thereon, the shaft rod end is inserted into the inner side of the gear and limited on the outer side of the limiting ring, the rectangular block integrally formed on the shaft rod is inserted into the rectangular slot, and the shaft rod is fixed on the gear through the screw rod penetrating through the annular ring and being screwed with the rectangular block and the shaft rod.

[0013] As preferred, the bottom of the mounting cover is integrally formed with a limiting plate with a straight slot hole B, the positioning screw rod is screwed with the gear after penetrating through the straight slot hole B, and the positioning screw rod is arranged against the limiting ring, and the gear is tightly fixed in the space surrounded by the mounting cover and the pressing plate through the positioning screw rod.

[0014] As preferred, the positioning screw rod is located at the end away from the shaft rod.

[0015] An eccentric sleeve comprises an eccentric sleeve body and the eccentricity adjusting structure, and the mounting cover and the pressing plate are fixed on the eccentric sleeve body.

[0016] As preferred, the eccentric sleeve body is provided with a mounting groove matched with the mounting cover for limiting insertion and positioning, and the mounting cover is fixed by screwing with the mounting groove.

[0017] As preferred, the front surface of the eccentric sleeve body and the upper and lower ends of the mounting groove are provided with four positioning grooves arranged symmetrically left and right, and the four positioning plates on the upper and lower ends of the pressing plate are inserted into the positioning grooves, and the pressing plate is fixed on the eccentric sleeve body through the screws penetrating through the pressing plate and being screwed with the eccentric sleeve body, and the front surface of the pressing plate is flush with the front surface of the eccentric sleeve body.

[0018] As preferred, the back surface of the eccentric sleeve body is provided with an assembly groove, the eccentric sleeve body is provided with a straight slot hole C communicated with the assembly groove and communicated with the straight slot hole B and the mounting cover, the positioning screw rod penetrates through the straight slot hole C to tightly fix the gear in the space surrounded by the mounting cover and the pressing plate, and the nut on the positioning screw rod is limited in the assembly groove.

[0019] Compared with the prior art, the technical effects and advantages of the utility model are:

[0020] 1、The eccentricity adjusting structure and the eccentric sleeve, the meshing transmission of the gear and the straight rack has a precise transmission ratio, and the precise eccentricity adjustment can be realized. By controlling the rolling position of the gear on the straight rack, the distance between the shaft rod and the center of the eccentric sleeve can be accurately changed, so that the high-precision requirement of the eccentricity in different working scenes is met. The operation is simple, and the adjustment of the eccentricity can be realized only by rolling the gear on the straight rack, without the need of complex tools and cumbersome steps, so as to reduce the skill threshold and adjustment time cost of the operator, and the repeatability of the adjustment is ensured.

[0021] 2、The shaft rod and the gear are firmly connected by the screw rod, and can bear a large torque and force, so that the connection is stable during work, and the reliability of the whole adjusting structure is improved. The shaft rod is connected with the gear in a plug-in and threaded connection mode, so that the installation and disassembly of the shaft rod are relatively simple, and the maintenance and component replacement of the equipment are facilitated, so as to reduce the maintenance cost and downtime.

[0022] 3、The limiting plate at the bottom of the mounting cover cooperates with the positioning screw rod, the positioning screw rod abuts against the limiting ring, the gear can be tightly fixed in the space surrounded by the mounting cover and the pressing plate, the gear is prevented from moving due to vibration and other factors during work, and the stable eccentricity after adjustment is ensured. The gear can be fixed and adjusted by tightening or loosening the positioning screw rod, so that the operation is simple and fast, and the adjustment efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the first perspective view of the utility model;

[0024] Figure 2 It is the second perspective view of the utility model;

[0025] Figure 3 It is the exploded view of the utility model;

[0026] Figure 4 It is the structural schematic view of the mounting cover, the gear, the shaft rod and the positioning screw rod of the utility model;

[0027] Figure 5 It is the structural schematic view of the mounting cover and the gear of the utility model.

[0028] In the drawing: 1, mounting cover; 2, straight slot; 3, straight rack; 4, gear; 5, shaft rod; 6, pressing plate; 7, positioning screw rod; 8, limiting ring; 9, straight slot hole A; 10, annular ring; 11, rectangular groove; 12, rectangular block; 13, straight slot hole B; 14, limiting plate; 15, eccentric sleeve body; 16, mounting groove; 17, positioning groove; 18, positioning plate; 19, assembly groove; 20, straight slot hole C. DETAILED DESCRIPTION

[0029] Clearly and completely describe the technical scheme in the embodiments of the utility model with reference to the drawings in the embodiments of the utility model, obviously, the described embodiments are only a part of the embodiments of the utility model, and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of protection of the utility model.

[0030] The following will be combined Figures 1 to 5 Further detailed description is made to the present application,

[0031] The eccentricity adjusting structure is disclosed in the embodiments of the present application, which comprises a mounting cover 1, a gear 4, a pressing plate 6 and a positioning screw rod 7. The mounting cover 1 is in semicircular structure at both ends and a straight slot 2 is formed on the mounting cover 1, and a straight rack 3 is arranged on one side in the straight slot 2. The center of the semicircular part at one end of the mounting cover 1 is located at the center of the eccentric sleeve, and the semicircular part at the other end is arranged close to the outer edge of the eccentric sleeve.

[0032] The gear 4 is located in the straight slot 2 and meshes with the straight rack 3, and the gear 4 is fixedly connected with a shaft rod 5. By the meshing of the gear 4 and the straight rack 3, the position of the gear 4 relative to the mounting cover 1 is adjusted, and then the distance between the shaft rod 5 and the center of the eccentric sleeve is adjusted, and then the eccentricity is adjusted.

[0033] The pressing plate 6 is used for limiting the gear 4 in the space surrounded by the mounting cover 1 and the pressing plate 6, and the positioning screw rod 7 is used for positioning and fixing the gear 4 with the adjusted position on the mounting cover 1.

[0034] The eccentricity adjusting structure mainly utilizes the meshing transmission of the gear 4 and the straight rack 3 to realize the adjustment of the eccentricity. The gear 4 is located in the straight slot 2 of the mounting cover 1 and meshes with the straight rack 3. When the gear 4 rolls on the straight rack 3, the position of the gear 4 relative to the mounting cover 1 changes. Since the gear 4 is fixedly connected with the shaft rod 5, the position of the shaft rod 5 also changes, and since the center of the semicircular part at one end of the mounting cover 1 is located at the center of the eccentric sleeve, the distance between the shaft rod 5 and the center of the eccentric sleeve changes, and the change of the distance represents the change of the eccentricity.

[0035] The meshing transmission of the gear 4 and the straight rack 3 has a precise transmission ratio, which can realize relatively accurate eccentricity adjustment and meet different working requirements. By simply rolling the gear 4 on the straight rack 3, the adjustment of the eccentricity can be realized without complex tools and steps. Each adjustment can be accurately controlled according to the relative position of the gear 4 and the straight rack 3, which ensures the repeatability of the adjustment and facilitates maintaining consistent eccentricity in multiple uses.

[0036] The inner side of the gear 4 is fixedly provided with a limiting ring 8, and the top end of the gear 4 is integrally formed with an annular ring 10 arranged through a straight slot hole A9 of the pressing plate 6, the annular ring 10 is provided with a rectangular slot 11 communicated with the center hole thereon, the end of the shaft rod 5 is inserted into the inner side of the gear 4 and is limited to the outer side of the limiting ring 8, the rectangular block 12 integrally formed on the shaft rod 5 is inserted into the rectangular slot 11, and the shaft rod 5 is fixed on the gear 4 through the screw rod penetrating through the annular ring 10 and being threadedly connected with the rectangular block 12 and the shaft rod 5.

[0037] The inner side of the gear 4 is fixedly provided with a limiting ring 8, and the top end of the gear 4 is integrally formed with an annular ring 10 arranged through a straight slot hole A9 of the pressing plate 6, the annular ring 10 is provided with a rectangular slot 11 communicated with the center hole thereon, the end of the shaft rod 5 is inserted into the inner side of the gear 4 and is limited to the outer side of the limiting ring 8, the rectangular block 12 integrally formed on the shaft rod 5 is inserted into the rectangular slot 11, and the shaft rod 5 is fixed on the gear 4 through the screw rod penetrating through the annular ring 10 and being threadedly connected with the rectangular block 12 and the shaft rod 5.

[0038] The bottom of the mounting cover 1 is integrally formed with a limiting plate 14 provided with a straight slot hole B13, the positioning screw rod 7 is threadedly connected with the gear 4 after penetrating through the straight slot hole B13, and the positioning screw rod 7 abuts against the limiting ring 8, so that the gear 4 is tightly fixed in the space surrounded by the mounting cover 1 and the pressing plate 6 through the positioning screw rod 7. The positioning screw rod 7 is located at the end away from the shaft rod 5.

[0039] The positioning screw rod 7 abuts against the limiting ring 8, so that the gear 4 is tightly fixed in the space surrounded by the mounting cover 1 and the pressing plate 6, and the gear 4 is prevented from moving during the working process, so as to ensure that the adjusted eccentricity is stable and unchangeable. The gear 4 can be fixed and adjusted by tightening or loosening the positioning screw rod 7, and the operation is simple and fast. The positioning screw rod 7 is located at the end away from the shaft rod 5, so as not to interfere with the rotation and working of the shaft rod 5, and the normal operation of the entire eccentricity adjusting structure is ensured.

[0040] An eccentric sleeve comprises an eccentric sleeve body 15 and the above-mentioned eccentricity adjusting structure, and the mounting cover 1 and the pressing plate 6 are both mounted and fixed on the eccentric sleeve body 15.

[0041] The eccentric sleeve body 15 is provided with a mounting groove 16 for limiting and inserting positioning of the mounting cover 1, and the mounting cover 1 is screw-fixed with the mounting groove 16. The mounting groove 16 can limit and insert position the mounting cover 1, so as to ensure that the mounting position of the mounting cover 1 on the eccentric sleeve body 15 is accurate, and avoid that the installation deviation affects the accuracy of the eccentricity adjustment. The screw-fixed mode of the screw can firmly fix the mounting cover 1 on the eccentric sleeve body 15, so as to ensure that the mounting cover 1 will not be loose or displaced during the working process.

[0042] The front surface of the eccentric sleeve body 15 is provided with four positioning grooves 17 arranged symmetrically left and right at the upper and lower ends of the mounting groove 16, four positioning plates 18 at the upper and lower ends of the pressing plate 6 are inserted into the positioning grooves 17, and the pressing plate 6 is mounted and fixed on the eccentric sleeve body 15 by means of the screws penetrating through the pressing plate 6 and screwed with the eccentric sleeve body 15, and the front surface of the pressing plate 6 is flush with the front surface of the eccentric sleeve body 15.

[0043] The cooperation of the positioning grooves 17 and the positioning plates 18 can accurately mount the pressing plate 6 on the eccentric sleeve body 15, ensure the accurate relative position between the pressing plate 6 and the mounting cover 1, and thus better limit the gear 4. The front surface of the pressing plate 6 is flush with the front surface of the eccentric sleeve body 15, so that the appearance of the entire eccentric sleeve is more neat and beautiful, and it is also convenient to use in some occasions with requirements on appearance.

[0044] The back surface of the eccentric sleeve body 15 is provided with an assembly groove 19, the eccentric sleeve body 15 is provided with a straight slot hole C20 communicated with the assembly groove 19 and communicated with the straight slot hole B13 and the mounting cover 1, the positioning screw 7 penetrates through the straight slot hole C20 to tightly fix the gear 4 in the space surrounded by the mounting cover 1 and the pressing plate 6, and the nut on the positioning screw 7 is limited in the assembly groove 19.

[0045] The assembly groove 19 can limit and protect the nut of the positioning screw 7, prevent the nut from being collided and damaged by the outside world, and prolong the service life of the positioning screw 7. The operation of the positioning screw 7 from the back surface of the eccentric sleeve body 15 will not affect other components and structures on the front surface, the operation is more convenient, and the safety and reliability of the entire eccentric sleeve are improved. This design makes the installation and adjustment of the positioning screw 7 not occupy too much space, and makes the overall structure of the eccentric sleeve more compact, which is convenient for installation and use in limited space.

[0046] Finally, it should be noted that: the above only describes the preferred embodiments of the present application, and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An eccentricity adjustment structure, characterized in that, include: Mounting cover (1) has a semi-circular structure at both ends and a straight groove (2) is provided on it. A straight toothed rack (3) is provided on one side of the straight groove (2). The center of the semi-circular part at one end of the mounting cover (1) is located at the center of the eccentric sleeve, and the semi-circular part at the other end is located close to the outer edge of the eccentric sleeve. Gear (4) is located in the straight slot (2) and meshes with the rack (3). Gear (4) is fixedly connected to shaft (5). By meshing gear (4) with rack (3), the position of gear (4) relative to mounting cover (1) is adjusted, thereby adjusting the distance between shaft (5) and the center of eccentric sleeve, and thus adjusting the eccentricity. The pressure plate (6) is used to limit the gear (4) within the space enclosed by the mounting cover (1) and the pressure plate (6); The positioning screw (7) is used to position and fix the gear (4) on the mounting cover (1).

2. The eccentricity adjustment structure according to claim 1, characterized in that: A limiting ring (8) is fixedly provided on the inner side of the gear (4), and an annular ring (10) is integrally formed on the top of the gear (4) through the straight slot hole A (9) on the pressure plate (6). A rectangular groove (11) is provided on the annular ring (10) and communicates with the center hole thereon. The end of the shaft (5) is inserted into the inner side of the gear (4) and limited to the outer side of the limiting ring (8). A rectangular block (12) integrally formed on the shaft (5) is inserted into the rectangular groove (11). The shaft (5) is fixed on the gear (4) by a screw that passes through the annular ring (10) and is threadedly connected to the rectangular block (12) and the shaft (5).

3. The eccentricity adjustment structure according to claim 2, characterized in that: The bottom of the mounting cover (1) is integrally formed with a limiting plate (14) with a straight slot hole B (13). The positioning screw (7) passes through the straight slot hole B (13) and is threadedly connected to the gear (4). The positioning screw (7) is set to abut against the limiting ring (8). The gear (4) is pressed and fixed in the space enclosed by the mounting cover (1) and the pressure plate (6) by the positioning screw (7).

4. The eccentricity adjustment structure according to claim 3, characterized in that: The positioning screw (7) is located at one end away from the shaft (5).

5. An eccentric sleeve, characterized in that, The eccentric sleeve body (15) and the eccentricity adjustment structure as described in any one of claims 1-4 are included, with the mounting cover (1) and pressure plate (6) both mounted and fixed on the eccentric sleeve body (15).

6. An eccentric sleeve according to claim 5, characterized in that: The eccentric sleeve body (15) is provided with a mounting groove (16) for positioning and limiting the mounting cover (1). The mounting cover (1) is fixed to the mounting groove (16) by screws.

7. An eccentric sleeve according to claim 5, characterized in that: The front of the eccentric sleeve body (15) and the upper and lower ends of the mounting groove (16) are provided with four positioning grooves (17) arranged symmetrically on the left and right. After the four positioning plates (18) at the upper and lower ends of the pressure plate (6) are inserted into the positioning grooves (17), the pressure plate (6) is installed and fixed on the eccentric sleeve body (15) by screws that pass through the pressure plate (6) and are screwed to the eccentric sleeve body (15), and the front of the pressure plate (6) is flush with the front of the eccentric sleeve body (15).

8. An eccentric sleeve according to claim 7, characterized in that: The back of the eccentric sleeve body (15) is provided with an assembly groove (19). The eccentric sleeve body (15) is provided with a straight groove hole C (20) that is connected to the assembly groove (19) and to the straight groove hole B (13) and the mounting cover (1). After the positioning screw (7) passes through the straight groove hole C (20), it tightens and fixes the gear (4) in the space enclosed by the mounting cover (1) and the pressure plate (6). The nut on the positioning screw (7) is limited in the assembly groove (19).

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