Horizontal four-axis cam turntable

Abstract

The utility model discloses a horizontal four -axle cam rotary table relates to mechanical transmission equipment technical field, it includes box, output shaft, camshaft and needle bearing, be provided with an output shaft installation cavity of front -back direction setting on the box, still be provided with a camshaft installation cavity of left and right direction setting on the box, the camshaft installation cavity is located the below of output shaft installation cavity, and with its inside intercommunication, and output shaft rotatory installation is in output shaft installation cavity. The utility model carrying capacity is improved obviously: through needle bearing direct transmission torque, avoided the stress concentration problem of traditional key connection, can bear higher radial and axial load, is applicable to heavy -duty processing equipment, transmission precision improves greatly: the cooperation clearance of needle bearing and camshaft is small, and the contact area is big, eliminates the transmission error of key clearance, and the positioning accuracy and motion stability of output shaft are obviously superior to traditional structure.

Description

Technical Field

[0001] This utility model relates to the field of mechanical transmission equipment technology, and in particular to a horizontal four-axis cam turntable. Background Technology

[0002] In existing rotary table technology, the split cam and input shaft are typically connected by a key to achieve torque transmission. This structure has the following drawbacks: Poor load-bearing capacity: Keyed connections are prone to stress concentration under heavy load conditions, leading to wear or deformation of the connection parts, which limits the upper limit of the turntable's load. Low transmission accuracy: Key gaps introduce transmission errors, affecting the positioning accuracy and motion smoothness of the output shaft, making it difficult to meet the requirements of precision machining; High assembly complexity: Split cams require precise alignment and fixation with the input shaft via a key, making the assembly process cumbersome and demanding, which increases the difficulty of maintenance.

[0003] Therefore, there is an urgent need for a new type of turntable structure that is simple in structure, has a strong load-bearing capacity, and high transmission accuracy. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a horizontal four-axis cam turntable. By optimizing the torque transmission structure, it solves the problems of poor load-bearing capacity, low transmission accuracy, and complex assembly in existing technologies, thereby achieving stable transmission and high-precision positioning under high load conditions.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A horizontal four-axis cam rotary table includes a housing, an output shaft, a camshaft, and a needle roller bearing. The housing is provided with an output shaft mounting cavity arranged in a front-to-back direction, and the housing is also provided with a camshaft mounting cavity arranged in a left-to-right direction. The camshaft mounting cavity is located below the output shaft mounting cavity and is connected to its interior. The output shaft is rotatably mounted in the output shaft mounting cavity. The camshaft is rotatably mounted in the camshaft mounting cavity, and input eccentric sleeves are fixedly mounted on both sides of the outer side of the camshaft. The needle roller bearing is fixedly mounted on the output shaft, and the needle roller bearing cooperates with the camshaft. A motor plate is fixedly installed on the outside of the housing. A brake sleeve is fixedly fitted on the outside of the output shaft, which contacts the inner wall of the output shaft mounting cavity. An input gear is fixedly fitted on the output shaft. When the camshaft is rotated, it can directly transmit torque to the output shaft through the needle roller bearing to drive the output shaft to rotate.

[0006] As a further description of the above technical solution, an output cover that is movably fitted to the outside of the output shaft is fixedly installed on the front side of the housing. The output cover has an annular structure and an output flange surface is provided on the output cover.

[0007] As a further description of the above technical solution, a tapered roller bearing is fixedly installed between the outer rear side of the output shaft and the output cover, and a rear bearing mounting seat is installed on the rear side of the housing, with the tapered roller bearing fixedly installed inside the rear bearing mounting seat. The synergistic effect of the tapered roller bearing and the output cover further enhances the stability of the overall structure.

[0008] As a further description of the above technical solution, the output shaft is internally hollow, and both the front and rear ends of the output shaft are open. The hollow design of the output shaft takes into account both lightweight and functional expansion requirements.

[0009] As a further description of the above technical solution, a curved groove is provided on the outer side of the camshaft for driving the needle roller bearing to rotate.

[0010] The beneficial effects of this utility model are as follows: 1. The load-bearing capacity of this utility model is significantly improved: the torque is directly transmitted through the needle roller bearing, avoiding the stress concentration problem of traditional key connection, and can withstand higher radial and axial loads, making it suitable for heavy-duty processing equipment; 2. The transmission accuracy of this utility model is greatly improved: the fit clearance between the needle roller bearing and the camshaft is small and the contact area is large, which eliminates the transmission error caused by the key gap. The positioning accuracy and motion stability of the output shaft are significantly better than those of the traditional structure. 3. This utility model is easy to assemble and maintain: The mating structure of the needle roller bearing and the camshaft simplifies the torque transmission path, eliminating the need for complex key alignment and fixing operations, thus reducing assembly difficulty and maintenance costs. Attached Figure Description

[0011] Figure 1 This is a front view of the internal structure of the housing of this utility model; Figure 2 This is a front view structural diagram of the camshaft mounting area of ​​this utility model; Figure 3 This is a front view of the connection between the output cover and the tapered roller bearing of this utility model. Figure 4 This utility model Figure 1 A schematic diagram of the cross-sectional structure; Figure 5 This utility model Figure 2 A schematic diagram of the cross-sectional structure; Figure 6 This utility model Figure 3 A schematic diagram of the cross-sectional structure; Figure 7 This is a schematic diagram of the external structure of this utility model.

[0012] In the diagram: 1. Output shaft mounting cavity; 2. Output shaft; 3. Camshaft mounting cavity; 4. Camshaft; 5. Input eccentric sleeve; 6. Needle roller bearing; 7. Input gear; 8. Motor plate; 9. Output cover; 10. Tapered roller bearing; 11. Output flange face; 12. Housing; 13. Brake sleeve; 14. Rear bearing mounting seat. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0014] Reference Figure 1-7 A horizontal four-axis cam turntable includes a housing 12, an output shaft 2, a camshaft 4, and a needle roller bearing 6. The housing 12 is provided with an output shaft mounting cavity 1 arranged in the front-to-back direction, and the housing 12 is also provided with a camshaft mounting cavity 3 arranged in the left-to-right direction. The camshaft mounting cavity 3 is located below the output shaft mounting cavity 1 and is connected to its interior. The output shaft 2 is rotatably mounted in the output shaft mounting cavity 1. Furthermore, the camshaft 4 is rotatably mounted in the camshaft mounting cavity 3, and input eccentric sleeves 5 are fixedly mounted on both sides of the outer side of the camshaft 4. The outer ends of the eccentric sleeves 5 are fixed by nuts and caps. The needle roller bearing 6 is fixedly mounted on the output shaft 2 and cooperates with the camshaft 4. Furthermore, a motor plate 8 is fixedly installed on the outside of the housing 12, a brake sleeve 13 is fixedly fitted on the outside of the output shaft 2 and contacts the inner wall of the output shaft mounting cavity 1, an input gear 7 is fixedly fitted on the output shaft 2, and when the camshaft 4 is rotated, it can directly transmit torque to the output shaft 2 through the needle roller bearing 6 to drive the output shaft 2 to rotate; Furthermore, an output cover 9 is fixedly installed on the front side of the housing 12 and is movably fitted to the outside of the output shaft 2. The output cover 9 has a ring structure and an output flange surface 11 is provided on the output cover 9. A tapered roller bearing 10 is fixedly installed between the rear side of the output shaft 2 and the output cover 9. A rear bearing mounting seat 14 is installed on the rear side of the housing 12, and the tapered roller bearing 10 is fixedly installed in the rear bearing mounting seat 14. Furthermore, the output shaft 2 has a hollow interior, with both the front and rear ends of the output shaft 2 being open, and a curved groove is provided on the outer side of the camshaft 4 to drive the needle roller bearing 6 to rotate.

[0015] Working Principle: First, the output shaft 2 is rotatably mounted in the output shaft mounting cavity 1 via bearings. The cavity has a hollow structure to accommodate internal wiring. The camshaft 4 is rotatably mounted in the camshaft mounting cavity 3 and fitted with an input eccentric sleeve 5. The outer ends of the input eccentric sleeve 5 are secured with nuts and caps to ensure the axial positioning and rotational stability of the camshaft 4. Second, a needle roller bearing 6 is fixedly mounted on the outer circumference of the output shaft 2. The outer ring of the needle roller bearing 6 fits tightly against the outer circumference of the camshaft 4. When external power drives the camshaft 4 to rotate, the camshaft 4 directly... The torque is transmitted to the output shaft 2, which drives the output shaft 2 to rotate synchronously and realize power output. Finally, in order to further improve the support performance of the output shaft 2, a tapered roller bearing 10 is fixedly installed between its outer rear end and the output cover 9 (the output cover 9 is a ring structure, fixed to the front side of the housing 12 and movably fitted with the output shaft 2). It can bear axial and radial loads at the same time and prevent the output shaft 2 from shifting or vibrating when rotating at high speed. In addition, a curved groove of a specific shape is opened on the outer side of the camshaft 4 to guide the needle roller bearing 6 to roll along a preset track, thereby optimizing torque transmission efficiency and motion smoothness.

[0016] The contents not described in detail in this specification are prior art known to those skilled in the art. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A horizontal four-axis cam rotary table, characterized in that, Includes housing (12), output shaft (2), camshaft (4) and needle roller bearing (6); The housing (12) is provided with an output shaft mounting cavity (1) arranged in the front-to-back direction, and the housing (12) is also provided with a camshaft mounting cavity (3) arranged in the left-to-right direction. The camshaft mounting cavity (3) is located below the output shaft mounting cavity (1) and is connected to its interior. The output shaft (2) is rotatably mounted in the output shaft mounting cavity (1). The camshaft (4) is rotatably mounted in the camshaft mounting cavity (3), and input eccentric sleeves (5) are fixedly mounted on both sides of the outer side of the camshaft (4). The needle roller bearing (6) is fixedly mounted on the output shaft (2), and the needle roller bearing (6) cooperates with the camshaft (4). The outer side of the housing (12) is fixedly mounted with a motor plate (8), and the outer side of the output shaft (2) is fixedly fitted with a brake sleeve (13) that contacts the inner wall of the output shaft mounting cavity (1), and the output shaft (2) is fixedly fitted with an input gear (7).

2. The horizontal four-axis cam rotary table according to claim 1, characterized in that, An output cover (9) is fixedly installed on the front side of the housing (12) and is movably fitted to the outside of the output shaft (2). The output cover (9) is a ring structure and has an output flange surface (11).

3. A horizontal four-axis cam rotary table according to claim 1, characterized in that, A tapered roller bearing (10) is fixedly installed between the outer rear side of the output shaft (2) and the output cover (9). A rear bearing mounting seat (14) is installed on the rear side of the housing (12), and the tapered roller bearing (10) is fixedly installed in the rear bearing mounting seat (14).

4. A horizontal four-axis cam rotary table according to claim 1, characterized in that, The output shaft (2) has a hollow interior and both the front and rear ends are open.

5. A horizontal four-axis cam rotary table according to claim 1, characterized in that, A curved groove is provided on the outer side of the camshaft (4).

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