A variable pitch rotary material handling device module

Abstract

This utility model belongs to the technical field of material handling equipment modules, and discloses a variable-pitch rotary material handling equipment module, including a rotary spindle, which is mounted on a frame via bearings, and a positioning seat is provided on the frame; a planetary gear system, which includes a sun gear, planet gears, an internal gear ring, and a planet carrier, with the sun gear mounted on the positioning seat and the planet gears fixedly connected to the rotary spindle via the planet carrier; and a variable-pitch cam disk, which is mounted on the front end of the rotary spindle via bearings, with a cam meshing gear ring on the outer edge of the variable-pitch cam disk, and a cam groove on the end face of the variable-pitch cam disk, in which a slider is slidably connected. This utility model replaces the complex connecting rod / cylinder mechanism with the integrated transmission of the planetary gear system and the variable-pitch cam disk, significantly simplifying the mechanical structure. At the same time, the self-aligning roller bearing supports the internal gear ring, and the deep groove ball bearing interferes with the planetary gear shaft, doubly enhancing the system rigidity and vibration resistance under high-speed rotation, thus solving the vibration problem of traditional gear transmission.

Description

Technical Field

[0001] This utility model relates to the technical field of material handling equipment modules, and in particular to a variable pitch rotary material handling equipment module. Background Technology

[0002] A variable pitch rotary material handling unit is an industrial automation device mainly used for material gripping, positioning and transfer. In automated production lines, rotary material handling equipment often needs to realize the function of adjusting the spacing of materials.

[0003] Traditional variable pitch mechanisms mostly use linkage mechanisms or cylinder drives, which have problems such as complex structure, poor motion stability, and insufficient adjustment accuracy. Especially under high-speed rotation conditions, the gear transmission system in the existing technology often suffers from increased vibration due to insufficient support stiffness of the planetary gear set. Moreover, the cam variable pitch mechanism generally suffers from radial motion jamming. In addition, conventional spiral groove design is difficult to balance motion smoothness and fast response requirements. When the suction cup spacing needs to be dynamically adjusted at high frequency, the wear resistance and repeatability of existing equipment will decrease significantly. Therefore, we propose a variable pitch rotary material handling device module. Utility Model Content

[0004] In view of the problems of complex structure, poor motion stability and insufficient adjustment accuracy of the existing variable pitch rotary material handling equipment module, this utility model is proposed.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A variable-pitch rotary material handling device module includes a rotary spindle, which is mounted on a frame via bearings, and a positioning seat is provided on the frame; A planetary gear train, comprising a sun gear, planet gears, an internal gear ring, and a planet carrier, wherein the sun gear shaft is mounted on the positioning seat, and the planet gears are fixedly connected to the rotating main shaft via the planet carrier; A variable pitch cam disk is mounted on the front end of the rotating spindle via a bearing. The outer edge of the variable pitch cam disk is provided with an integrally formed cam engagement gear ring that meshes with the planetary gear. The end face of the variable pitch cam disk is provided with at least one cam groove. A slider for radial variable pitch movement is slidably connected in the cam groove.

[0006] As a technical solution of the variable pitch rotary material handling device module of this utility model, the planetary gear system includes at least three planetary gears, which are evenly distributed between the sun gear and the internal gear ring. The internal gear ring is mounted on the positioning seat through a self-aligning roller bearing, and the outer wall of the internal gear ring is connected to an external drive motor.

[0007] As a technical solution of the variable pitch rotary material handling device module of this utility model, the planetary gear is mounted on the planetary carrier by a deep groove ball bearing, and the inner ring of the deep groove ball bearing is interference-fitted with the planetary gear shaft on the planetary gear.

[0008] As a technical solution of the variable pitch rotary material handling device module of this utility model, a spiral groove is provided on the cam groove, and the groove width of the spiral groove is connected to the slider with clearance.

[0009] As a technical solution of the variable pitch rotary material handling device module of this utility model, the helix angle of the spiral groove is 45°±2°.

[0010] As a technical solution of the variable pitch rotary material handling device module of this utility model, the variable pitch cam disk is connected to an external material handling suction cup that is arranged radially along the main rotating axis and installed on the slider through the slider.

[0011] Compared with the prior art, the present invention has at least the following beneficial effects: 1. This utility model replaces the complex connecting rod / cylinder mechanism with the integrated transmission of planetary gear train and variable pitch cam disc, which significantly simplifies the mechanical structure. At the same time, the self-aligning roller bearing supports the internal gear ring and the deep groove ball bearing interferes with the planetary gear shaft, which doubly enhances the system rigidity and vibration resistance under high speed rotation, so as to solve the vibration problem of traditional gear transmission.

[0012] 2. This utility model, by adopting the clearance fit of the spiral groove and the precise spiral helix angle design, can take into account both the rapid response and stability of the variable pitch motion, reduce jamming and impact wear. At the same time, the design of the slider directly connecting to the external material suction cup shortens the transmission chain. Combined with the high rigidity support structure, it ensures the repeatability and wear resistance under high frequency variable pitch conditions. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0015] Figure 3 This is an exploded front view schematic diagram of the planetary gear train and variable pitch cam disk of this utility model.

[0016] Figure 4 This is an exploded side view of the planetary gear train and variable pitch cam disk of this utility model.

[0017] Explanation of reference numerals in the attached figures: In the diagram: 1. Rotating spindle; 201. Sun gear; 202. Planet gear; 203. Internal gear ring; 204. Planet carrier; 3. Variable pitch cam disk; 301. Cam meshing gear ring; 302. Cam groove; 303. Helical groove; 4. Slider; 5. Positioning seat. Detailed Implementation

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0019] Reference Figures 1-4 A variable pitch rotary material handling device module is provided. This variable pitch rotary material handling device module includes a rotary spindle 1, which is mounted on a frame (not shown in the figure) via a double row angular contact ball bearing. The rear end is connected to a servo motor via a coupling to realize the rotary drive of the rotary spindle 1. A positioning seat 5 is provided on the frame. The planetary gear train includes a sun gear 201, planet gears 202, an internal gear ring 203, and a planet carrier 204. The sun gear shaft on the sun gear 201 is mounted on the positioning seat 5, and the planet gears 202 are fixedly connected to the rotating main shaft 1 through the planet carrier 204. A variable-pitch cam disk 3 is mounted on the front end of the rotating spindle 1 via bearings. The outer edge of the variable-pitch cam disk 3 is provided with an integrally formed cam engagement gear ring 301 that meshes with the planetary gear 202. The cam engagement gear ring 301 and the planetary gear 202 have a module of 2 and a gear ratio of 1:3. The end face of the variable-pitch cam disk 3 is provided with at least one cam groove 302. A slider 4 for radial pitch change motion is slidably connected in the cam groove 302 to achieve the radial pitch change motion as the variable-pitch cam disk 3 rotates. The slider 4 is made of GCr15 material. In application, the variable-pitch cam disk 3 is driven by the planetary gear system to convert the rotational motion into the radial pitch change motion of the slider 4, replacing the traditional connecting rod / cylinder structure, simplifying the transmission chain, reducing the number of moving parts, and reducing the failure rate. At the same time, the outer edge of the variable-pitch cam disk 3 directly integrates the cam engagement gear ring 301 and the planetary gear 202 to avoid additional transmission mechanisms, improve the structural compactness and motion synchronization accuracy.

[0020] Reference Figure 3 and Figure 4The planetary gear train includes at least three planetary gears 202, which are evenly distributed between the sun gear 201 and the internal gear ring 203. The internal gear ring 203 is mounted on the positioning seat 5 via self-aligning roller bearings (model 22220 CC / W33). The self-aligning roller bearings are embedded in the positioning seat 5, and the outer wall of the internal gear ring 203 is connected to the external drive motor. The internal gear ring 203 and the external drive motor (speed ratio 10:1) are driven by a synchronous belt. In application, the even distribution of three or more planetary gears 202 improves the uniformity of load distribution and reduces single-tooth wear. At the same time, the internal gear ring 203 is mounted with self-aligning roller bearings to compensate for assembly errors and shaft deformation, enhance the support stiffness under high-speed rotation, and suppress vibration, which can address the problem of insufficient stiffness in traditional planetary gear sets.

[0021] Reference Figure 3 and Figure 4 The planetary gear 202 is mounted on the planetary carrier 204 via a deep groove ball bearing, and the inner ring of the deep groove ball bearing is interference-fitted with the planetary gear shaft on the planetary gear 202. In application, the interference fit between the planetary gear shaft of the planetary gear 202 and the inner ring of the deep groove ball bearing eliminates clearance, avoids positioning deviation caused by micro-vibration during high-speed operation, and improves motion stability.

[0022] Reference Figure 3 and Figure 4 A helical groove 303 is provided on the cam groove 302. The groove width of the helical groove 303 is connected to the slider 4 with a clearance fit. The helical groove 303 converts the rotation of the variable pitch cam disk 3 into the radial displacement of the slider 4. The formula is Δr=θ*P / 360°, where P is the helical lead and θ is the rotation angle of the variable pitch cam disk 3. The helix angle of the helical groove 303 is 45°±2°. In application, the clearance fit design between the helical groove 303 and the slider 4 can reduce the risk of movement jamming of the slider 4. The 45°±2° helix angle balances the smoothness of movement and response speed. At the same time, the larger helix angle shortens the variable pitch stroke time (fast response). Strict tolerance control ensures that the acceleration change of the slider 4 is smooth and avoids impact wear.

[0023] Reference Figures 1-4 The variable pitch cam disk 3 is connected to an external material-picking suction cup that is radially arranged along the rotating main shaft 1 and mounted on the slider 4 via a slider 4. The material-picking suction cup is made of silicone and is connected to an external vacuum generator through a vacuum pipeline. The radial displacement of the slider 4 directly drives the change of the suction cup spacing. The maximum load is 5kg / suction cup. In application, the slider 4 is directly connected to the external material-picking suction cup, reducing intermediate transmission links, improving the repeatability of variable pitch accuracy, and adapting to the needs of high-frequency dynamic adjustment.

[0024] The working principle of this utility model is as follows: The internal gear ring 203 is driven to rotate by an external drive motor, and the planetary gear 202 drives the variable pitch cam disk 3 to rotate in the opposite direction. The spiral groove 303 converts the rotation of the variable pitch cam disk 3 into the radial displacement of the slider 4. Then the rotating main shaft 1 rotates and drives the material suction cup to adsorb the material under the assistance of centrifugal force. When the material is picked up, the internal gear ring 203 rotates in the opposite direction to reset, the slider 4 retracts to the initial position, and then the material is released.

[0025] This utility model provides a variable-pitch rotary material handling device module. This module replaces the complex linkage / cylinder mechanism with the integrated transmission of the planetary gear train and the variable-pitch cam disk 3, which significantly simplifies the mechanical structure. The self-aligning roller bearing supports the internal gear ring 203, and the deep groove ball bearing is interference-fitted with the planetary gear shaft, which doubly enhances the system rigidity and vibration resistance under high-speed rotation to solve the vibration problem of traditional gear transmission. At the same time, by adopting the clearance fit of the helical groove 303 and the precise helix angle design, it can take into account the rapid response and smoothness of the variable-pitch motion, reduce jamming and impact wear. The design of the slider 4 directly connecting to the external material handling suction cup shortens the transmission chain. Combined with the high-rigidity support structure, it ensures the repeatability and wear resistance under high-frequency variable-pitch conditions.

[0026] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A variable-pitch rotary material handling device module, characterized in that: include: A rotating spindle (1) is mounted on a frame via bearings, and a positioning seat (5) is provided on the frame. The planetary gear train includes a sun gear (201), planet gears (202), an internal gear ring (203), and a planet carrier (204). The sun gear shaft on the sun gear (201) is mounted on the positioning seat (5), and the planet gears (202) are fixedly connected to the rotating main shaft (1) through the planet carrier (204). A variable pitch cam disk (3) is mounted on the front end of the rotating spindle (1) via a bearing. The outer edge of the variable pitch cam disk (3) is provided with an integrally formed cam meshing gear ring (301) that meshes with the planetary gear (202). The end face of the variable pitch cam disk (3) is provided with at least one cam groove (302). A slider (4) for radial variable pitch motion is slidably connected in the cam groove (302) to rotate with the variable pitch cam disk (3).

2. The variable-pitch rotary material handling device module according to claim 1, characterized in that: The planetary gear system includes at least three planetary gears (202), which are evenly distributed between the sun gear (201) and the internal gear ring (203). The internal gear ring (203) is mounted on the positioning seat (5) through a self-aligning roller bearing, and the outer wall of the internal gear ring (203) is connected to an external drive motor.

3. The variable-pitch rotary material handling device module according to claim 2, characterized in that: The planetary gear (202) is mounted on the planet carrier (204) via a deep groove ball bearing, and the inner ring of the deep groove ball bearing is interference-fitted with the planetary gear shaft on the planetary gear (202).

4. The variable-pitch rotary material handling device module according to claim 1, characterized in that: The cam groove (302) is provided with a spiral groove (303), and the width of the spiral groove (303) is connected to the slider (4) with a clearance fit.

5. The variable-pitch rotary material handling device module according to claim 4, characterized in that: The helix angle of the spiral groove (303) is 45°±2°.

6. The variable-pitch rotary material handling device module according to claim 1, characterized in that: The variable pitch cam disk (3) is connected to an external material suction cup that is arranged radially along the main rotating shaft (1) and mounted on the slider (4) via the slider (4).

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