Oldham coupling

Abstract

The utility model provides a crosshead shoe coupling which comprises a first coupling half, a second coupling half, a middle disc, a plurality of steel ball retainers and a plurality of steel balls, one end face of the first coupling half and one end face of the second coupling half are provided with sliding grooves, and the sliding groove of the first coupling half is perpendicular to the sliding groove of the second coupling half. The middle disc is located between the first half coupling and the second half coupling and connected with the first half coupling and the second half coupling, steel ball grooves are formed in the two end faces of the middle disc, the steel ball retainers are fixedly installed on the inner walls of the steel ball grooves in the two end faces of the middle disc, and steel balls are placed in the steel ball retainers. The steel balls can roll in the sliding grooves of the first half coupling and the sliding grooves of the second half coupling. The steel balls are designed to replace convex teeth of a conventional middle disc, so that about 20 times of radial relative displacement between shafts of a traditional crosshead shoe coupling is realized, and meanwhile, the structural characteristics of simple structure, high torque rigidity, high sensitivity and zero rotation clearance of the traditional crosshead shoe coupling are kept.

Description

Technical Field

[0001] The utility model relates to the field of automobiles, in particular to a cross slide coupling. Background Art

[0002] Crossed Slider Coupling (Crossed Slider Coupling or Cross Slide Coupling), also known as metal elastic element coupling, is a mechanical component commonly used to transmit rotational motion and torque. It mainly consists of two half-couplings and a cross slider with convex teeth on both sides arranged at 90° in the middle of the two half-couplings. This cross slider can also be called an intermediate disk. The intermediate disk allows a certain axial, radial and angular displacement between the two half-couplings. Because the convex teeth can slide in the grooves, the relative displacement between the two shafts during installation and operation can be compensated. Generally, the radial relative displacement between the two shafts is not greater than 0.01d (d is the shaft diameter).

[0003] The traditional cross slider coupling has the structural characteristics of simple structure, high torque rigidity, high sensitivity and zero rotational clearance. However, the convex teeth of the intermediate disk are subject to large sliding friction in the process of compensating the relative displacement between the two shafts during installation and operation by sliding in the grooves. The transmission efficiency is greatly affected by its sliding friction. How to reduce the sliding friction between the slider and the half coupling while maintaining the advantages of the traditional cross slider coupling has become a difficult problem. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an Oldham coupling, which can reduce the sliding friction between the slider and the half coupling.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] The cross slider coupling comprises a first half coupling, a second half coupling and an intermediate disk, the first half coupling being a column having an output shaft through hole, the second half coupling being a column having a reducer shaft through hole, the intermediate disk being a column having two parallel end surfaces, one end surface of the first half coupling and one end surface of the second half coupling being provided with a slide groove, and the slide groove of the first half coupling and the slide groove of the second half coupling being perpendicular to each other, the intermediate disk being located between the first half coupling and the second half coupling and being connected to the first half coupling and the second half coupling, comprising a plurality of steel ball retainers and a plurality of steel balls, steel ball grooves being formed on both end surfaces of the intermediate disk, the steel ball retainers being fixedly mounted on the inner walls of the steel ball grooves on the two end surfaces of the intermediate disk, steel balls being placed in the steel ball retainers, and the steel balls being able to roll in the slide grooves of the first half coupling and the slide grooves of the second half coupling.

[0007] Furthermore, it includes two coupling sleeves and two polyurethane elastomers, the first half coupling and the second half coupling both have cylinders extending from the end faces away from the intermediate disk, the coupling sleeve is a cylindrical sleeve, and the coupling sleeve is provided with an output shaft keyway and a half coupling keyway, the end face of the cylinder away from the intermediate disk is located inside the through hole of the coupling sleeve, and the cylinder is connected to the coupling sleeve via the half coupling keyway, and one of the two polyurethane elastomers is inserted between the coupling sleeve and the first half coupling and abuts against the two, and the other polyurethane elastomer is inserted between the coupling sleeve and the second half coupling and abuts against the two.

[0008] Furthermore, it comprises two adjustment blocks, wherein the adjustment blocks are U-shaped blocks, the inner walls of the two adjustment blocks are respectively engaged with the outer circumferences of the two cylinders, and the adjustment blocks are located between the coupling sleeve and the polyurethane elastomer.

[0009] Furthermore, the first half coupling, the second half coupling and the intermediate disk are all cylinders with parallel end surfaces.

[0010] Furthermore, the steel ball retainer is connected to the steel ball grooves on both end surfaces of the intermediate disk by screws.

[0011] Furthermore, the steel ball retainer is made of steel material.

[0012] The beneficial effects of the utility model are:

[0013] The cross slider coupling provided by the utility model adopts steel balls as sliders, which reduces sliding friction and significantly improves transmission efficiency. The steel balls roll in the slide grooves, and the friction force is smaller than the sliding friction force of the traditional sliders, thereby reducing energy loss and improving transmission efficiency.

[0014] The design of steel balls and steel ball retainers also makes the relative movement between the first half coupling and the second half coupling smoother, reduces the wear caused by sliding friction, and extends the service life of the coupling.

[0015] By using the adjustment block and the polyurethane elastomer, the inner walls of the two adjustment blocks are respectively statically matched with the outer circumference of the two cylinders and the two adjustment blocks can adjust the matching position on the outer circumference of the two cylinders, so the preload force of the coupling can be flexibly adjusted according to the actual working conditions to reduce the axial clearance between the steel ball and the slideway, thereby improving the adaptability of the coupling to different working conditions. At the same time, the polyurethane elastomer has good shock-absorbing and noise-reducing properties, which can effectively reduce the noise level during the operation of the coupling and create a quieter working environment.

[0016] The steel ball retainer is connected to the intermediate disk by screws, which is convenient for disassembly and replacement, reducing maintenance costs and time consumption.

[0017] The coupling design takes thermal expansion into consideration. Through appropriate clearance reservation and the use of elastomers, it can automatically compensate for small axial and radial displacements when the temperature changes, reducing the mechanical stress caused by thermal expansion. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present utility model, the drawings required for use in the embodiments are briefly introduced below.

[0019] Figure 1 It is a structural diagram of the cross slider coupling.

[0020] Figure 2 It is a schematic diagram of the structure of the first half coupling.

[0021] Figure 3 It is a structural diagram of a steel ball retainer.

[0022] Marked in the figure, 1-first half coupling, 2-second half coupling, 3-intermediate plate, 4-steel ball, 5-steel ball retainer, 6-adjusting block, 7-polyurethane elastomer, 8-coupling sleeve. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings.

[0024] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described below are only used to explain the utility model and are not used to limit the utility model.

[0025] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by the terms "up", "down", "horizontal", "vertical", "far away", "close" etc. should be understood in a broad sense and are not used to limit the scope of protection of the present invention. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0026] The cross slider coupling comprises a first half coupling 1, a second half coupling 2 and an intermediate disk 3, wherein the first half coupling 1 is a column having an output shaft through hole, the second half coupling 2 is a column having a reducer shaft through hole, and the intermediate disk 3 is a column having two parallel end surfaces, one end surface of the first half coupling 1 and one end surface of the second half coupling 2 are both provided with a slide groove, and the slide groove of the first half coupling 1 and the slide groove of the second half coupling 2 are perpendicular to each other, the intermediate disk 3 is located between the first half coupling 1 and the second half coupling 2 and is connected to the first half coupling 1 and the second half coupling 2, and comprises a plurality of steel ball retainers 5 and a plurality of steel balls 4, steel ball grooves are formed on both end surfaces of the intermediate disk 3, the steel ball retainer 5 is fixedly mounted on the inner walls of the steel ball grooves on the two end surfaces of the intermediate disk 3, steel balls 4 are placed in the steel ball retainer 5, and the steel balls 4 can roll in the slide grooves of the first half coupling 1 and the slide grooves of the second half coupling 2.

[0027] During installation, first fix a number of steel ball retainers 5 on the inner walls of the steel ball grooves on the two end faces of the intermediate disk 3 until they are full, then insert an equal number of steel balls 4 into the steel ball retainers 5, and then align the slide grooves on the first half coupling 1 and the second half coupling 2 with the steel balls 4 to complete the installation. During actual use, the steel balls 4 can roll in the slide grooves, and the slide grooves of the first half coupling 1 and the second half coupling 2, which are perpendicular to each other, can compensate for slight axial and radial displacements.

[0028] like Figure 1 As shown, the steel ball 4 is used as a slider, which reduces sliding friction and significantly improves transmission efficiency. The steel ball 4 rolls in the slide groove, and the friction force is less than the sliding friction force of the traditional slider, thereby reducing energy loss and improving transmission efficiency. At the same time, the design of the steel ball 4 and the steel ball retainer 5 also makes the relative movement between the first half coupling 1 and the second half coupling 2 smoother, reduces the wear caused by sliding friction, and extends the service life of the coupling.

[0029] Furthermore, it includes two coupling sleeves 8 and two polyurethane elastomers 7, the first half-coupling 1 and the second half-coupling 2 both have cylinders extending from the end faces away from the intermediate disk 3, the coupling sleeve 8 is a cylindrical sleeve, and the coupling sleeve 8 is provided with an output shaft keyway and a half-coupling keyway, the end face of the cylinder away from the intermediate disk 3 is located inside the through hole of the coupling sleeve 8, and the cylinder is connected to the coupling sleeve 8 through the half-coupling keyway, and one of the two polyurethane elastomers 7 is inserted between the coupling sleeve 8 and the first half-coupling 1 and abuts against the two, and the other polyurethane elastomer 7 is inserted between the coupling sleeve 8 and the second half-coupling 2 and abuts against the two.

[0030] By using the coupling sleeve 8 and the polyurethane elastomer 7, the preload of the coupling can be flexibly adjusted according to the actual working conditions, the axial clearance between the steel ball 4 and the slideway is reduced, and the adaptability of the coupling to different working conditions is improved. At the same time, the polyurethane elastomer 7 has good shock-absorbing and noise-reducing properties, which can effectively reduce the noise level during the operation of the coupling and create a quieter working environment.

[0031] Furthermore, it includes two adjustment blocks 6 , which are U-shaped blocks. The inner walls of the two adjustment blocks 6 are respectively engaged with the outer circumferences of the two cylinders. The adjustment blocks 6 are located between the coupling sleeve 8 and the polyurethane elastomer 7 .

[0032] Due to the addition of the coupling sleeve 8 and the polyurethane elastomer 7, the first half coupling 1 and the second half coupling 2 both have cylinders extending out on the end faces away from the intermediate disk 3. Therefore, it is necessary to set an adjustment block 6 to install the coupling sleeve 8 and the polyurethane elastomer 7.

[0033] Furthermore, the first half coupling 1, the second half coupling 2 and the intermediate disk 3 are all cylinders with parallel end surfaces.

[0034] Cylindrical parts can be easily manufactured by turning and other processes, and the processing technology is mature and the cost is relatively low. The cylindrical design of the first half coupling 1 and the second half coupling 2 can evenly distribute the load, improve the bearing capacity and durability of the coupling, and the cylindrical design of the intermediate disk 3 facilitates sliding in the groove of the half coupling, ensuring that the coupling can adapt to the offset of the shaft. At the same time, the cylindrical design naturally has good radial symmetry, which helps to reduce unbalanced forces, thereby reducing vibration and noise.

[0035] like Figure 3 As shown, the steel ball retainer 5 is connected to the grooves on the two end surfaces of the intermediate disk 3 by screws.

[0036] In this solution, the steel ball retainer 5 and the intermediate disk 3 can also be connected by snap connection, welding or the like, but considering the comprehensive requirements of connection strength and ease of disassembly, screw connection is preferably used.

[0037] Furthermore, the steel ball retainer 5 is made of steel material, which increases the structural rigidity, reduces the weight of the overall coupling, and also reduces the production cost.

[0038] The material, preparation process and surface treatment method of the cross-slider coupling provided by the utility model are not limited. For those skilled in the art, the utility model can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A cross-slider coupling, comprising a first half coupling (1), a second half coupling (2) and an intermediate disk (3), wherein the first half coupling (1), the second half coupling (2) and the intermediate disk (3) are all cylinders with parallel end surfaces, one end surface of the first half coupling (1) and one end surface of the second half coupling (2) are both provided with a slide groove, and the slide groove of the first half coupling (1) and the slide groove of the second half coupling (2) are perpendicular to each other, the intermediate disk (3) is located between the first half coupling (1) and the second half coupling (2) and is connected to the first half coupling (1) and the second half coupling (2), characterized in that: The invention comprises a plurality of steel ball retainers (5) and a plurality of steel balls (4). Steel ball grooves are formed on both end surfaces of the intermediate disk (3). The steel ball retainers (5) are fixedly mounted on the inner walls of the steel ball grooves on both end surfaces of the intermediate disk (3). Steel balls (4) are placed in the steel ball retainers (5). The steel balls (4) can roll in the slide grooves of the first half coupling (1) and the slide grooves of the second half coupling (2).

2. The Oldham coupling according to claim 1, characterized in that: The invention comprises two coupling sleeves (8) and two polyurethane elastomers (7). The first half coupling (1) and the second half coupling (2) both have cylinders extending from their end faces away from the intermediate disk (3). The coupling sleeve (8) is a cylindrical sleeve. The coupling sleeve (8) is provided with an output shaft keyway and a half coupling keyway. The end face of the cylinder away from the intermediate disk (3) is located inside the through hole of the coupling sleeve (8), and the cylinder is connected to the coupling sleeve (8) via the half coupling keyway. Of the two polyurethane elastomers (7), one polyurethane elastomer (7) is inserted between the coupling sleeve (8) and the first half coupling (1) and abuts against the two, and the other polyurethane elastomer (7) is inserted between the coupling sleeve (8) and the second half coupling (2) and abuts against the two.

3. The Oldham coupling according to claim 2, characterized in that: It comprises two adjustment blocks (6), wherein the adjustment blocks (6) are U-shaped blocks, the inner walls of the two adjustment blocks (6) are respectively engaged with the outer circumferences of two cylinders, and the adjustment blocks (6) are located between the shaft coupling (8) and the polyurethane elastomer (7).

4. The Oldham coupling according to claim 1, characterized in that: The first half coupling (1), the second half coupling (2) and the intermediate disk (3) are all cylinders with parallel end surfaces.

5. The Oldham coupling according to claim 1, characterized in that: The steel ball retainer (5) is connected to the steel ball grooves on both end surfaces of the intermediate disk (3) via screws.

6. The Oldham coupling according to claim 1, characterized in that: The steel ball retainer (5) is made of steel material.

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