High-performance four-axis rotary table

Abstract

The utility model relates to machine tool accessory technical field discloses a high -performance four -axis rotary table, including bottom plate, rotating mechanism and connecting mechanism, rotating mechanism includes the support frame and connecting frame fixed in bottom plate both sides, and the inside planetary gear of connecting frame is installed, and the inside ball and carousel of support frame are inlayed, and the fixed connection locating plate between support frame and connecting frame, and connecting mechanism includes the fixed hole of opening in bottom plate, and the rotating connection adjusting frame no.

Description

Technical Field

[0001] This utility model relates to the field of machine tool accessories technology, and in particular to a high-performance four-axis rotary table. Background Technology

[0002] Four-axis rotary tables are commonly used core accessories on CNC machine tools and machining centers, mainly used to achieve workpiece rotation indexing and multi-faceted machining. When existing four-axis rotary tables achieve rotational functions, the rotating mechanism usually relies on a single transmission and support system. When the rotary table performs high-speed rotational machining, this single structure needs to bear the cutting torque and the axial and radial loads of the workpiece simultaneously, resulting in very large internal frictional torque in the rotating mechanism. At the same time, the transmission efficiency of the worm gear transmission mechanism is relatively low, and the large amount of heat generated by friction also affects the accuracy of key components. This leads to insufficient stability of the rotary table under high-speed operation, making it difficult to guarantee rotational accuracy and directly affecting the final machining quality.

[0003] In addition, in terms of the installation and fixing of the rotary table, the existing rotary table base usually relies on simple bolt holes for positioning and locking. This fixing method lacks flexibility and adjustment when facing T-slots of machine tool worktables of different specifications. The installation process is cumbersome and time-consuming, and it is difficult to guarantee the absolute firmness of the fixed connection. Under heavy cutting, a small displacement will occur between the rotary table base and the machine tool, which further reduces the stability of the machining.

[0004] Therefore, this invention proposes a high-performance four-axis rotary table to address the shortcomings of existing technologies. Utility Model Content

[0005] In view of the problems of high friction, low transmission efficiency, and poor machining accuracy during high-speed rotation, as well as the poor flexibility and insufficient connection of the base fixing method in the existing high-performance four-axis rotary table, this utility model aims to provide a high-performance four-axis rotary table with an improved structure that can effectively solve the above problems. This utility model provides a high-performance four-axis rotary table, including: a base plate; and a rotating mechanism and a connecting mechanism.

[0006] The rotating mechanism includes a support frame and a connecting frame fixed to both sides of the base plate. Planetary gears are installed inside the connecting frame, and ball bearings and a turntable rotatably connected to the support frame are embedded inside the support frame. The support frame and the connecting frame are fixedly connected by a positioning plate via a connecting plate; The positioning plate is rotatably connected to the connecting plate and the rotating disk, and a bearing is installed between the rotating disk and the connecting plate; The connecting mechanism includes a fixing hole in the base plate, an adjusting frame one and an adjusting frame two are rotatably connected in the fixing hole, a lead screw is threaded between the adjusting frame one and the adjusting frame two, a fixing block is rotatably connected to the bottom end of the adjusting frame one and the adjusting frame two respectively, and a threaded rod and a nut are installed on the side of the support frame.

[0007] Preferably, the support frame and the connecting frame are fixedly connected to the left and right sides of the top surface of the base plate.

[0008] Preferably, the planetary gear is used to improve transmission efficiency for rotational adjustment.

[0009] Preferably, the turntable is mounted on the other side of the ball bearing, and the turntable rotates inside the support frame via the fixing frame.

[0010] Preferably, the rotating disk, in conjunction with the connecting plate at the bottom, improves the compatibility of the connection; the bearing is used to reduce friction and facilitate steering.

[0011] Preferably, the fixing hole is used to improve the flexibility of the turntable fixing; the tops of the first adjustment bracket and the second adjustment bracket are rotatably connected inside the fixing hole.

[0012] Preferably, the lead screw rotates through the middle of the second adjustment frame and acts on the first adjustment frame to adjust the distance between the two.

[0013] Preferably, the threaded rod and nut are used for traction and fixation of the connecting wire to protect the device and increase connection stability.

[0014] This utility model has the following beneficial effects: 1. This utility model solves the problems of high friction, low transmission efficiency, and poor stability of turntables in the prior art by setting a rotating mechanism. The rotating mechanism adopts a separate structure with planetary gear drive on one side and ball bearing and turntable support on the other side. It achieves the effects of high transmission efficiency, low rotational friction, stable support, and high processing accuracy.

[0015] 2. This utility model solves the problems of single fixing method, inconvenient adjustment, unstable fixing and poor adaptability of the turntable base in the prior art by setting a connecting mechanism inside the base plate, using a screw to drive the adjustment frame and adjusting and clamping it through the fixing block at the bottom of the adjustment frame. It achieves the effects of flexible fixing, convenient adjustment, firm installation and wide applicability. Attached Figure Description

[0016] Figure 1 This is a front perspective view of a high-performance four-axis rotary table proposed in this utility model; Figure 2This is a partial structural exploded view of a high-performance four-axis rotary table proposed in this utility model; Figure 3 This is an exploded view of a partial structure of a high-performance four-axis rotary table proposed in this utility model; Figure 4 This is a partial structural diagram of a high-performance four-axis rotary table proposed in this utility model.

[0017] Legend: 1. Base plate; 2. Rotating mechanism; 201. Support frame; 202. Connecting frame; 203. Planetary gear; 204. Connecting disc; 205. Positioning plate; 206. Fixing frame; 207. Turntable; 208. Ball bearing; 209. Connecting plate; 210. Turning disc; 211. Bearing; 3. Connecting mechanism; 301. Fixing hole; 302. Adjusting frame one; 303. Adjusting frame two; 304. Fixing block; 305. Lead screw; 306. Threaded rod; 307. Nut. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in 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 a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Example

[0019] Please refer to Figures 1 to 4 This utility model provides a high-performance four-axis turntable, which aims to solve the problems of high friction and low transmission efficiency leading to insufficient precision and stability in the existing four-axis turntables when rotating at high speed, as well as poor flexibility and insufficient firmness of the base fixing method.

[0020] like Figure 1 and Figure 2As shown, a high-performance four-axis rotary table includes a base plate 1, a rotating mechanism 2 and a connecting mechanism 3 mounted on the base plate 1. The base plate 1 serves as the mounting base for the entire device. The rotating mechanism 2 is used to achieve high-precision rotary machining of the workpiece. The connecting mechanism 3 is used to flexibly and firmly fix the base plate 1 to the machine tool. The rotating mechanism 2 includes a support frame 201 and a connecting frame 202 fixed to both sides of the base plate 1. The support frame 201 and the connecting frame 202 are fixedly connected to the left and right sides of the top surface of the base plate 1. The connecting frame 202 has a built-in... Planetary gear 203 is used to improve transmission efficiency for rotational adjustment. A ball bearing 208 is embedded inside the support frame 201. A turntable 207 is mounted on the other side of the ball bearing 208. The turntable 207 rotates inside the support frame 201 via a fixed frame 206. A positioning plate 205 is fixedly connected between the support frame 201 and the connecting frame 202 via a connecting plate 204. The positioning plate 205 supports the connecting tooling fixture. A connecting plate 209 and a turntable 210 are rotatably connected to the positioning plate 205. A bearing 211 is installed between the rotating disk 210 and the connecting plate 209. The rotating disk 210, in conjunction with the bottom connecting plate 209, improves the compatibility of the connection. The bearing 211 is used to reduce friction and facilitate steering. A threaded rod 306 and a nut 307 are installed on the side of the support frame 201. The threaded rod 306 and the nut 307 are used for traction and fixation of the connecting line to protect the device and increase the stability of the connection. The connecting mechanism 3 includes multiple fixing holes 301 opened inside the base plate 1. The fixing holes 301 are used to improve the fixation of the turntable. For flexibility, the tops of adjustment frame one 302 and adjustment frame two 303 are rotatably connected inside the fixing hole 301. A lead screw 305 is threaded between adjustment frame one 302 and adjustment frame two 303. The lead screw 305 passes through the middle of adjustment frame two 303 by rotation and acts on adjustment frame one 302 to adjust the distance between the two. The bottom ends of adjustment frame one 302 and adjustment frame two 303 are respectively rotatably connected to fixing blocks 304. Fixing blocks 304 are used to increase the contact friction coefficient and ensure the fixation is firm.

[0021] Please refer to Figures 1 to 4The rotating mechanism 2 includes a support frame 201 and a connecting frame 202 fixed to both sides of the base plate 1. The support frame 201 and the connecting frame 202 are fixedly connected to the left and right sides of the top surface of the base plate 1. A planetary gear 203 is installed inside the connecting frame 202. The planetary gear 203 is used to improve the transmission efficiency for rotation adjustment. A ball bearing 208 is embedded inside the support frame 201. A turntable 207 is installed on the other side of the ball bearing 208. The turntable 207 is rotatably connected to the inside of the support frame 201 through a fixed frame 206. The ball bearing 208 is used to support the turntable 207 to rotate smoothly and reduce friction. A rotating connecting disc 2 is installed on an adjacent side of the support frame 201 and the connecting frame 202. 04. The connecting plate 204 is used to fix the positioning plate 205. The positioning plate 205 facilitates the support of the connecting tooling fixture. The positioning plate 205 internally rotatably connects the connecting plate 209 and the rotating disk 210. A bearing 211 is installed between the rotating disk 210 and the connecting plate 209. The rotating disk 210 cooperates with the bottom connecting plate 209 to improve the compatibility of the connection. The bearing 211 is used to extend the service life and realize convenient steering. This split structure, which provides efficient transmission through the planetary gear 203 on one end and low-friction support through the ball bearing 208 and the rotating disk 207 on the other end, ensures high stability and high precision of the positioning plate 205 during high-speed rotation. Please refer to Figure 1 and Figure 3 The connecting mechanism 3 is installed inside the base plate 1. Multiple fixing holes 301 are opened inside the connecting mechanism 3 within the base plate 1. These fixing holes 301 facilitate the fitting of the structure and improve the flexibility of the turntable's fixation. The tops of the second adjusting frame 303 and the first adjusting frame 302 are rotatably connected inside the fixing holes 301. The bottoms of the second adjusting frame 303 and the first adjusting frame 302 cooperate to achieve a quick-locking effect. A lead screw 305 is rotatably connected to the middle of the first adjusting frame 302 and the second adjusting frame 303. The lead screw 305 rotates to one side of the first adjusting frame 302 and passes through the adjusting frame. In the middle of the second frame 303, the distance between the two can be adjusted. During the process of reducing the distance, the bottom ends of the second frame 303 and the first frame 302 are respectively rotatably connected to the fixing block 304. The fixing block 304 increases the contact friction coefficient and ensures firmness. For the auxiliary cable management structure, the threaded rod 306 and the nut 307 are installed on the side of the support frame 201. The threaded rod 306 and the nut 307 are used for the traction and fixation of the connecting wire, which makes it easy to pull the connecting wire from the inside to the inside of the equipment, protecting the safety of the device while increasing the connection stability of the device.

[0022] As a preferred embodiment, please refer to Figure 1 The support frame 201 and the connecting frame 202 are fixedly connected to the top surface of the base plate 1 on the left and right sides with high-strength bolts, providing a symmetrical and stable installation base for the rotating mechanism 2, ensuring that no displacement occurs under high-speed rotation and cutting force.

[0023] As a preferred embodiment, please refer to Figure 2 In order to achieve efficient drive transmission, a transmission cavity is provided inside the connecting frame 202. The planetary gear 203 is installed inside the transmission cavity. The input shaft of the planetary gear 203 is connected to an external servo motor, and the output end of the planetary gear 203 is splined connected to the connecting plate 204. The planetary gear 203 provides high transmission efficiency, high torque and high indexing accuracy for the rotation adjustment of the positioning plate 205.

[0024] Furthermore, as a preferred embodiment, please refer to... Figure 2 and Figure 3 To achieve low-friction driven support, the support frame 201 has a precision-machined cavity inside. The balls 208 are arranged in an array and embedded in the cavity inside the support frame 201. On the other side of the balls 208, a turntable 207 that has been quenched and ground is installed. The turntable 207 is rotatably connected to the inside of the support frame 201 through a fixing frame 206. The fixing frame 206 is fixed to the support frame 201 with screws. The rolling contact between the balls 208 and the turntable 207 effectively reduces the coefficient of rotational friction and improves the rigidity and stability of the support end.

[0025] As another preferred embodiment, please refer to Figure 3 and Figure 4 To improve the adaptability and rotational flexibility of workpiece installation, a through mounting hole is provided inside the positioning plate 205. The connecting plate 209 and the rotating disk 210 are rotatably connected through the mounting hole. A high-precision bearing 211 is installed between the rotating disk 210 and the connecting plate 209. The end face of the rotating disk 210 cooperates with the bottom connecting plate 209 to form the installation interface of the fourth axis. The interface can be provided with a T-slot or a positioning pin hole, which improves the adaptability of connecting different tooling fixtures. The bearing 211 is used to reduce friction and facilitate steering, ensuring the accuracy of the fourth axis rotation.

[0026] In addition, as a preferred embodiment, please refer to Figure 1 and Figure 3 To achieve flexible installation and positioning, the connecting mechanism 3 includes multiple fixing holes 301 opened inside the base plate 1. The fixing holes 301 are evenly distributed along the length of the base plate 1 to improve the flexibility of the turntable fixing. The tops of the first adjustment frame 302 and the second adjustment frame 303 are rotatably connected to the inside of the fixing holes 301 by a pin. The pin connection allows the first adjustment frame 302 and the second adjustment frame 303 to swing around the fixing holes 301 at a small angle.

[0027] As a preferred embodiment of the above-described connecting mechanism 3, please refer to Figure 3To facilitate convenient clamping adjustment, the lead screw 305 is rotatably connected to the middle of the first adjustment frame 302 and the second adjustment frame 303. One end of the lead screw 305 is equipped with an operating handle. The lead screw 305 passes through the middle of the second adjustment frame 303 through the rotating thread and acts on the first adjustment frame 302 to adjust the distance between the two. By operating the lead screw 305, the entire base plate 1 can be quickly locked or released.

[0028] Finally, as a preferred embodiment, please refer to... Figure 1 To protect the cables and standardize the wiring, the support frame 201 is equipped with a threaded rod 306 and a nut 307 on its side. The threaded rod 306 and the nut 307 form a waterproof and dustproof cable connector for pulling and fixing the connecting wires. This facilitates the pulling of the encoder or motor connecting wires from the inside into the equipment, protecting the device's safety while increasing the connection stability of the device.

[0029] Working principle: During the processing of the parts, the base plate 1 needs to be fixed first. At this time, the connecting mechanism 3 is operated. By rotating the lead screw 305, since the lead screw 305 is threaded between the first adjusting frame 302 and the second adjusting frame 303, the rotation of the lead screw 305 causes the middle distance between the first adjusting frame 302 and the second adjusting frame 303 to change. Since the top of the first adjusting frame 302 and the second adjusting frame 303 is rotatably connected to the inside of the fixing hole 301, forming a lever fulcrum, the change in the middle distance will cause the bottom ends of the first adjusting frame 302 and the second adjusting frame 303 to swing in the opposite direction around the top fulcrum. The bottom ends of the first adjusting frame 302 and the second adjusting frame 303 are respectively rotatably connected to the fixing blocks 304. The fixing blocks 304, as the force-bearing end, are pushed to press against both sides of the T-slot of the machine tool worktable. By utilizing the increased contact friction coefficient of the fixing blocks 304, a firm, quick and highly adaptable fixation of the base plate 1 is achieved, solving the problems of insecure and inflexible fixation. After fixing, the selected fixture and workpiece are clamped and placed on the positioning plate 205. The machining program is started, and the power input of the spindle servo motor is sent to the connecting frame 202, driving the planetary gear 203 to work. The planetary gear 203, as a high-efficiency transmission mechanism, transmits the rotational motion to the connecting plate 204. Since the connecting plate 204 is fixedly connected to the positioning plate 205, the positioning plate 205 is thus driven to rotate with high precision around the central axis. While the positioning plate 205 is rotating, the other end of the positioning plate 205 is synchronously supported by the support frame 201. The turntable 20 inside the support frame 201... 7, serving as the contact interface, rotates synchronously with the positioning plate 205. The turntable 207 is stably connected to the inside of the support frame 201 via the fixed frame 206. The load of the turntable 207 is borne by the lower ball bearings 208. The rolling of the ball bearings 208 replaces sliding friction, greatly reducing the friction coefficient of the driven end. This separate structure, with efficient driving by the planetary gear 203 at one end and low-friction support by the ball bearings 208 at the other end, synergistically ensures the high precision and high stability of the positioning plate 205 under high-speed rotation, solving the problems of high friction and low efficiency of traditional turntables, and is particularly suitable for multi-faceted machining. At the same time, the rotating disk 210 mounted on the positioning plate 205 can be driven by another drive source to realize the rotation of the workpiece around the second axis. Since a high-precision bearing 211 is installed between the rotating disk 210 and the connecting plate 209, the rolling characteristics of the bearing 211 ensure that the rotating disk 210 can still turn conveniently, smoothly and with high precision when carrying the workpiece. The rotating disk 210, together with the bottom connecting plate 209, provides a standardized installation interface, which improves the adaptability of connecting tooling fixtures. During the entire processing, the connecting cable can be connected through the threaded rod 30 installed on the side of the support frame 201. The interface formed by threaded rod 306 and nut 307 is used for traction and fixation. The setting of threaded rod 306 and nut 307 protects the safety of the connecting line and avoids the cable being pulled during rotation, increasing the stability of the device connection. In summary, this utility model achieves flexible and firm installation of base plate 1 through lever clamping of connecting mechanism 3, and achieves high-efficiency, low-friction, and high-precision multi-axis linkage processing through the separation design of active planetary gear 203 driving and passive ball bearing 208 supporting the rotating mechanism 2, combined with highly adaptable fourth axis rotating disk 210 and bearing 211.

Claims

1. A high-performance four-axis rotary table, comprising: Base plate (1); Its features are, The high-performance four-axis rotary table also includes a rotation mechanism (2) and a connection mechanism (3). The rotating mechanism (2) includes a support frame (201) and a connecting frame (202) fixed on both sides of the base plate (1). The connecting frame (202) is equipped with a planetary gear (203). The support frame (201) is inlaid with a ball (208) and a turntable (207) rotatably connected by a fixed frame (206). The support frame (201) and the connecting frame (202) are fixedly connected to the positioning plate (205) via the connecting plate (204). The positioning plate (205) is rotatably connected to the connecting plate (209) and the rotating plate (210). The rotating plate (210) and the connecting plate (209) are installed with a bearing (211). The connecting mechanism (3) includes a fixing hole (301) opened in the base plate (1), an adjusting frame one (302) and an adjusting frame two (303) are rotatably connected in the fixing hole (301), a lead screw (305) is threaded between the adjusting frame one (302) and the adjusting frame two (303), a fixing block (304) is rotatably connected to the bottom end of the adjusting frame one (302) and the adjusting frame two (303), and a threaded rod (306) and a nut (307) are installed on the side of the support frame (201).

2. The high-performance four-axis rotary table according to claim 1, characterized in that, The support frame (201) and the connecting frame (202) are fixedly connected to the left and right sides of the top surface of the base plate (1).

3. The high-performance four-axis rotary table according to claim 1, characterized in that, The planetary gear (203) is used to improve transmission efficiency for rotational adjustment.

4. A high-performance four-axis rotary table according to claim 1, characterized in that, The turntable (207) is mounted on the other side of the ball (208), and the turntable (207) rotates inside the support frame (201) via the fixing frame (206).

5. A high-performance four-axis rotary table according to claim 1, characterized in that, The rotating disk (210) works in conjunction with the connecting plate (209) at the bottom to improve the compatibility of the connection, and the bearing (211) is used to reduce friction and facilitate steering.

6. A high-performance four-axis rotary table according to claim 1, characterized in that, The fixing hole (301) is used to improve the flexibility of the turntable fixing, and the tops of the first adjustment bracket (302) and the second adjustment bracket (303) are rotatably connected inside the fixing hole (301).

7. A high-performance four-axis rotary table according to claim 6, characterized in that, The lead screw (305) rotates through the middle of the second adjustment frame (303) and acts on the first adjustment frame (302) to adjust the distance between the two.

8. A high-performance four-axis rotary table according to claim 1, characterized in that, The threaded rod (306) and nut (307) are used for traction and fixation of the connecting wire to protect the device and increase connection stability.

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