Zero-backlash split type roller cam structure

Abstract

The utility model discloses a zero-backlash split type roller cam structure which comprises a main body, a rotating tower is installed above the main body, a roller bearing is installed on the rotating tower, a fixing bolt is installed on the roller bearing, and a rotary table bearing is installed on the rear side of the rotating tower. The zero-backlash split type roller cam structure can be accurately positioned, and the accuracy is greatly improved. Rolling transmission of the roller and the cam improves positioning speed and efficiency, and ineffective positioning time is shortened. The pre-pressing design ensures zero back clearance, the structure is free of maintenance, and the later cost and workload are reduced. The contact surface of the roller and the cam is large, the rigidity is higher than that of a worm and gear structure rotary table, and the rotary table is more competitive in application scenes such as industrial equipment with high requirements for high precision, high efficiency and stability.

Description

TECHNICAL FIELD

[0001] The utility model relates to a turntable mechanism technical field, concretely is a kind of zero-backlash split type roller cam structure. BACKGROUND

[0002] Cam zero-clearance drive technology is a kind of extremely high-precision motion control technology, and has important application value in many key fields requiring accurate motion control, including but not limited to CNC equipment, grinding machine and engine etc.

[0003] At present, in the market pattern of turntable products, worm gear structure occupies a dominant position. The turbine material in this structure is phosphor bronze, which cannot be pre-pressed due to its own characteristics, which directly leads to the problem of poor rigidity. With the continuous wear and tear of the turntable in daily use, its accuracy will continue to decline. This downward trend in accuracy will cause a series of chain reactions, the most notable of which is the sharp rise in maintenance costs. For machine tool users, they have to face frequent equipment maintenance and high costs generated thereby, while for agents, it not only means that they need to handle more after-sales problems, but also suffer business pressure due to customer dissatisfaction, thereby causing a lot of trouble and serious economic losses to both parties. Of course, in order to overcome the shortcomings of worm gear structure, there are also some special processing methods, such as special processing of worm gear material by high-end brands like Riken and Rayman, but the cost of such processing method is very high, so that the general customers can not afford it.

[0004] At the same time, motor direct drive turntable DDR also faces its own problems that cannot be solved, among which the problem of heat has not been effectively solved. Once the motor overheats, it will have many adverse effects, such as causing the bearing to deform. After the bearing deforms, it will further cause the shaft center to deviate, which will lead to a decrease in flatness, and ultimately make the machining accuracy greatly discounted. In addition, the torque of direct drive motor itself is small, which makes the rigidity of the turntable insufficient, so that the selection range of suitable workpieces becomes very small. At present, this motor direct drive turntable DDR can only be used for small workpieces and light cutting force product machining. When facing other types of workpieces or machining tasks with larger cutting force requirements, it is not up to the task. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a zero-backlash split type roller cam structure to solve the problems raised in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical scheme: A zero-backlash split type roller cam structure, including main body, the upper portion of main body is installed with turret, the turret is installed with roller bearing, the roller bearing is installed with fixed bolt, the rear side of turret is installed with rotary table bearing.

[0007] Preferably, the main body includes a left main rod, a roller shaft is installed on the left side of the left main rod, a right main rod is installed on the right side of the roller shaft, and a fixed connection device is installed on the right side of the right main rod.

[0008] Preferably, the turret includes a connecting ring, a roller is arranged on the inner side of the connecting ring, screw holes are arranged on the connecting ring, a screw rod is installed on the screw hole, and a roller bearing is installed on the screw rod.

[0009] Preferably, the rotary table bearing includes a connecting shaft, a deep groove ball bearing is installed in the connecting shaft, and a rotating shaft is installed on the deep groove ball bearing.

[0010] Preferably, annular cam grooves are arranged on the left main rod and the right main rod, the surface of the cam groove on the main rod and the surface of the roller bearing on the connecting ring are in line contact engagement, so as to drive the connecting ring to rotate and further drive the roller to rotate. The depth of the annular cam groove is 3-5mm, the groove width is 1.2-1.5 times the diameter of the roller bearing (11), and the contact angle of the line contact engagement area is 45°±5°.

[0011] Preferably, the roller is connected with the screw hole arranged on the rotating shaft through the screw hole arranged on the surface, and rotates through the deep groove ball bearing behind the rotating shaft, so as to transmit torque.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] The zero-backlash split type roller cam structure can realize accurate positioning and has great improvement in precision compared with other structures. The rolling transmission between the roller and the cam greatly improves the positioning speed and efficiency, and effectively compresses the invalid positioning time to the minimum. In addition, the pre-pressing design plays a key role in the whole structure, which can ensure that the structure always maintains a zero-backlash state. The maintenance of this state makes the structure have the characteristics of maintenance-free, greatly reducing the cost and workload of later maintenance. In addition, the contact surface between the roller and the cam is larger, which makes the rigidity much higher than that of the worm and gear structure rotary table, so that it can better play a role in many application scenarios with high rigidity requirements, such as industrial equipment requiring high precision, high efficiency and stable performance. The combination of these characteristics makes the mechanical structure have strong competitiveness. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1The utility model discloses a structure schematic drawing.

[0015] Figure 2 The utility model discloses a structure disassembling drawing.

[0016] Figure 3 The utility model discloses a structure schematic drawing.

[0017] Figure 4 The utility model discloses a structure disassembling drawing

[0018] In the drawing: 1, main body;2, turret;3, rotary table bearing;4, left main rod;5, roller axle;6, right main rod;7, fixed connecting device;8, roller;9, connecting ring;10, screw hole;11, roller bearing;12, screw;13, rotating shaft;14, connecting shaft;15, deep groove ball bearing. Specific implementation

[0019] The technical scheme in the embodiments of the utility model will be apparently and completely described below with the drawings in the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative efforts belong to the range of protection of the utility model.

[0020] Embodiment: please refer to Figure 1 The utility model provides a kind of technical scheme: a zero-backlash split roller cam structure, including main body 1, the upper portion of main body 1 is equipped with turret 2, turret 2 is equipped with roller bearing 11, roller bearing 11 is equipped with fixed bolt, the rear side of turret 2 is equipped with rotary table bearing 3.

[0021] Among them, main body 1 includes left main rod 4, the left side of left main rod 4 is equipped with roller axle 5, the right side of roller axle 5 is equipped with right main rod 6, the right side of right main rod 6 is equipped with fixed connecting device 7.

[0022] Among them, annular cam groove is provided on left main rod 4 and right main rod 6, the surface of cam groove on main rod and the surface of roller bearing 11 on connecting ring 9 are in line contact engagement, to drive connecting ring rotation, further drive roller 8 rotation.

[0023] In the embodiment, precise positioning can be realized, and compared with other structures, the precision is greatly improved.And the rolling transmission of roller and cam greatly improves the positioning speed, and the positioning efficiency is higher, can effectively compress invalid positioning time to the minimum degree.And compared with other transmission modes such as surface contact, line contact engagement is relatively small when transmitting power, can reduce energy loss.

[0024] The turret 2 comprises a connecting ring 9, the inner side of the connecting ring 9 is provided with a roller 8, the connecting ring 9 is provided with a threaded hole 10, the threaded hole 10 is provided with a screw rod 12, and the screw rod 12 is provided with a roller bearing 11.

[0025] The roller 8 is connected with the threaded hole provided on the rotating shaft 13 through the threaded hole provided on the surface, and rotates through the deep groove ball bearing 15 behind the rotating shaft 13, so as to transmit the torque.

[0026] In the embodiment, the power can be efficiently transmitted from one component to another, and the effective use of power is ensured. The energy loss in the transmission process is reduced, the energy utilization efficiency of the whole mechanical system is improved, and the energy consumption is reduced.

[0027] The rotating table bearing 3 comprises a connecting shaft 14, the connecting shaft 14 is provided with a deep groove ball bearing 15, and the deep groove ball bearing 15 is provided with a rotating shaft 13.

[0028] In the embodiment, stable rotating support can be provided for the rotating shaft, so that the rotating shaft can still rotate stably when rotating at high speed or bearing a large radial force.

[0029] Working principle: in the actual application process, first, the left main rod 4 is driven to rotate by the roller 5. The roller 5 is the starting transmission component of the power, which stably transmits the power to the left main rod 4, so that the left main rod 4 starts to rotate around its own axis. While the left main rod 4 rotates, the right main rod 6 associated with it also rotates under the driving of the left main rod 4, so that the main body 1 rotates as a whole.

[0030] Subsequently, the roller bearing 11 installed on the connecting ring 9 of the turret 2 will be in contact with the annular cam groove of the main rod, forming a linear contact engagement state. When the main body 1 starts to rotate, the rotation of the main body 1 will drive the roller 8 to rotate due to the existence of the engagement relationship.

[0031] Finally, the roller 8 is provided with a threaded hole, and the threaded hole is connected with the rotating shaft 13. When the roller 8 is driven by the connecting ring 9 to rotate, it will drive the rotating shaft 13 connected therewith to rotate. The rotating shaft 13 rotates with the deep groove ball bearing 15 behind it as support. The deep groove ball bearing 15 is like a stable carrier, which provides necessary support and protection for the rotation of the rotating shaft 13, so as to smoothly transmit the torque on the roller 8 to meet the power demand of the whole equipment.

[0032] In the description of the utility model, still need to explain, unless another explicit provision and limitation, term " set ", " install ", " link ", " connect " should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication。For ordinary skilled person in the art, can understand the specific meaning of the above-mentioned terms in the utility model according to specific circumstances.

[0033] Although the embodiments of the utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made thereto without departing from the principles and spirit of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A zero-backlash split roller cam structure comprising a main body (1), characterized in that: The upper part of the main body (1) is installed with a turret (2), the turret (2) is installed with a roller bearing (11), the roller bearing (11) is installed with a fixing bolt, the rear side of the turret (2) is installed with a rotary table bearing (3); The main body (1) comprises a left main rod (4), the left side of the left main rod (4) is installed with a roller shaft (5), the right side of the roller shaft (5) is installed with a right main rod (6), the right side of the right main rod (6) is installed with a fixed connection device (7); The turret (2) comprises a connecting ring (9), the inner side of the connecting ring (9) is provided with a roller (8), the connecting ring (9) is provided with a screw hole (10), the screw hole (10) is installed with a screw rod (12), and the screw rod (12) is installed with a roller bearing (11).

2. A zero-backlash split roller cam structure according to claim 1, characterized in that: The rotary table bearing (3) comprises a connecting shaft (14), the connecting shaft (14) is installed with a deep groove ball bearing (15), and the deep groove ball bearing (15) is installed with a rotating shaft (13).

3. A zero-backlash split roller cam structure according to claim 1, characterized in that: The left main rod (4) and the right main rod (6) are provided with annular cam grooves, the surface of the cam groove on the main rod is in line contact engagement with the surface of the roller bearing (11) on the connecting ring (9), the depth of the annular cam groove is 3-5mm, the groove width is 1.2-1.5 times the diameter of the roller bearing (11), and the contact angle of the line contact engagement area is 45°±5°.

4. A zero-backlash split roller cam structure according to claim 1, characterized in that: The roller (8) is connected with the screw hole provided on the rotating shaft (13) through the screw hole provided on the surface, and rotates through the deep groove ball bearing (15) behind the rotating shaft (13).

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