A variable pitch module

Abstract

This invention discloses a variable-pitch module, including a slide rail, a slider, a screw, and a drive module. The screw groove includes a first end, a second end, and a starting end located at the center of the first and second ends. A first groove is formed from the starting end to the first end, and a second groove is formed from the starting end to the second end. The lateral extension length of the first groove is less than the lateral extension length of the second groove. When the screw rotates forward to return to its original position, the slider reciprocates along the first groove of the screw groove. When the screw rotates in reverse to return to its original position, the slider reciprocates along the second groove of the screw groove. When the forward and reverse rotation angles are the same, the distance the slider is driven by the first and second grooves differs, thus achieving unequal sliding of the slider on a single screw, greatly increasing its applicability.

Description

Technical Field

[0001] This invention relates to the field of variable pitch module technology. Background Technology

[0002] In automated loading and unloading processes during production, sometimes the distance between workpieces needs to be increased or decreased compared to the previous station, and multiple workpieces need to be loaded and unloaded simultaneously. If manual operation is used, the work efficiency is low and the labor intensity is high. Therefore, variable distance modules were developed.

[0003] Patent application number CN202221841854.9, entitled "A worm gear pitch-changing module", discloses a pitch-changing mold, including a motor, a worktable, and a worm gear. The motor and the worktable are connected to the worm gear. The motor is located on one side of the worm gear, and the worktable is located above the worm gear. The worm gear is provided with several helical tracks, and the two side walls of the helical tracks are symmetrically provided with positioning bosses. The worktable cooperates with the helical tracks through a guide mechanism, so that the worktable slides with pitch-changing motion when the worm gear rotates.

[0004] However, the pitch variation of the worktable in the aforementioned variable pitch module is equidistant, limiting its applicability. For these reasons, it is necessary to improve the existing technology. Summary of the Invention

[0005] I. Technical problems to be solved

[0006] The present invention addresses the aforementioned deficiencies in the prior art by proposing a variable pitch module to solve the problems mentioned in the background section.

[0007] II. Technical Solution

[0008] To solve the above-mentioned technical problems, the present invention provides a variable pitch module, comprising:

[0009] A slide rail has an internal cavity and a strip-shaped opening communicating with the internal cavity is provided at the upper end of the slide rail. Multiple sets of sliders are slidably arranged at the end of the slide rail with the opening, and the sliders include guides.

[0010] A screw is disposed within the internal cavity of the slide rail. Both ends of the screw are rotatably supported by the slide rail. Screw grooves matching the number of sliders are distributed on the screw. The guide member cooperates with the screw grooves.

[0011] The drive module includes a fixed seat disposed on one end face of the slide rail, a first drive wheel disposed on the end of the screw, a drive source disposed on the fixed seat, a second drive wheel disposed on the drive source, and a transmission belt tensioned on the first drive wheel and the second drive wheel.

[0012] The screw groove includes a first end, a second end, and a starting end located at the center of the first end and the second end. A first groove is formed from the starting end to the first end, and a second groove is formed from the starting end to the second end. The length of the first groove extending laterally is less than the length of the second groove extending laterally.

[0013] The fixed seat is equipped with a tensioning wheel, which presses against the transmission belt.

[0014] The slide rail is fixed with bearing seats at both ends, and bearings are installed in the bearing seats. The screw has shafts at both ends that cooperate with the bearings.

[0015] A protective cover is fixedly installed on the mounting base.

[0016] The slide rail is provided on both sides of the strip-shaped opening, and the slider has detachable locking blocks on both sides that slide in cooperation with the linear guide rail.

[0017] A protruding block is provided at the middle position of the slider, and the guide is disposed on the protruding block.

[0018] III. Beneficial Effects

[0019] Compared with the prior art, the present invention has the following beneficial effects: When the screw of the present invention returns to its original position in the forward rotation, the slider reciprocates along the first groove of the screw groove; when the screw returns to its original position in the reverse rotation, the slider reciprocates along the second groove of the screw groove. When the forward and reverse rotation angles are the same, the distances that the slider is driven by the first groove and the second groove are different. Therefore, the slider of a screw can slide at unequal distances, which greatly increases the scope of application. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0021] Figure 2 This is a top view of the structure of the present invention.

[0022] Figure 3 This is a three-dimensional structural diagram of the slider of the present invention.

[0023] Figure 4 This is a partial structural schematic diagram of the present invention.

[0024] Figure 5 This is a schematic diagram of the planar structure of the screw.

[0025] Figure 6 for Figure 5 A magnified view of a portion of point A in the middle. Detailed Implementation

[0026] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0027] Please see Figure 1-6 The present invention provides a variable pitch module, including a slide rail 1, a screw 2 and a drive module 3, wherein the screw 2 is rotatably disposed within the slide rail 1, and the drive module 3 is used to drive the screw 2 to rotate.

[0028] The slide rail 1 has an internal cavity, and a strip-shaped opening 10 communicating with the internal cavity is provided at the upper end of the slide rail 1. Multiple sets of sliders 4 are slidably arranged at the end of the slide rail 1 with the opening. Each slider 4 includes a guide member 40. A screw 2 is disposed in the internal cavity of the slide rail 1. Both ends of the screw 2 are rotatably supported by the slide rail 1. Screw grooves 20 matching the number of sliders are distributed on the screw 2. The guide member 40 and the screw grooves 20 cooperate. The drive module 3 includes a fixed seat 30 disposed on one end face of the slide rail 1, a first drive wheel 31 disposed at the end of the screw 2, a drive source 33 disposed on the fixed seat, a second drive wheel 32 disposed on the drive source, and a transmission belt 34 tensioned on the first drive wheel and the second drive wheel. The screw groove 20 includes a first end 20a, a second end 20b, and a drive belt 34 located at the first end 20a. A starting end 20c is located at the center of a first ending end and a second ending end 20a. A first groove 21 is formed between the starting end 20c and the first ending end 20a, and a second groove 22 is formed between the starting end 20c and the second ending end 20b. In this application, the positions of the starting end 20c, the first ending end 20a, and the second ending end 20b satisfy the following: when the screw 2 rotates forward by a specific angle, the guide member 40 can slide from the starting end 20c to the first starting end 20a; when the screw 2 rotates in the same direction by the same angle, the guide member 40 can slide from the starting end 20c to the second starting end 20b. That is, the starting end 20c and the first ending end 20a, and the starting end 20c and the second ending end 20b have the same angular interval; the lateral extension length of the first groove 21 is less than the lateral extension length of the second groove 22.

[0029] In the above structure, when the screw 2 rotates forward to return to its original position, the slider reciprocates along the first groove of the screw groove. When the screw rotates in reverse to return to its original position, the slider reciprocates along the second groove of the screw groove. When the forward and reverse rotation angles are the same, the distances that the slider is driven by the first groove and the second groove are different. Therefore, the slider of a screw can slide at unequal distances, which greatly increases the range of applications.

[0030] Specifically, a tensioning wheel 35 is provided on the fixed base 30, which abuts against the transmission belt 34 to enable the drive mechanism to better drive the screw to rotate. Bearing seats 11 are fixed at both ends of the slide rail 1, and bearings are provided inside the bearing seats. Shaft portions that cooperate with the bearings are provided at both ends of the screw 2. A protective cover 100 is fixedly provided on the fixed base 30.

[0031] Specifically, linear guide rails 12 are provided on both sides of the slide rail 1 located in the strip-shaped opening, and the slider 4 has detachable locking blocks 41 on both sides that slide in cooperation with the linear guide rails. A protruding block 42 is provided in the middle of the slider 4, and the guide member 40 is disposed on the protruding block 42.

[0032] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A variable pitch module, comprising: a slide rail (1) having an internal cavity, and a strip-shaped opening (10) communicating with the internal cavity being arranged at an upper end of the slide rail (1), a plurality of slide blocks (4) being arranged at one end of the slide rail (1) having the opening, the slide blocks (4) comprising a guide member (40); a screw rod (2) arranged in the internal cavity of the slide rail (1), both ends of the screw rod (2) being rotatably supported by the slide rail (1), a plurality of screw grooves (20) corresponding to the number of the slide blocks being distributed on the screw rod (2), the guide member (40) and the screw grooves (20) being matched; a driving module (3) comprising a fixing base (30) arranged on an end face of the slide rail (1), a first driving wheel (31) arranged at an end of the screw rod (2), a driving source (33) arranged on the fixing base (30), a second driving wheel (32) arranged on the driving source (33), and a transmission belt (34) being tensioned between the first driving wheel (31) and the second driving wheel (32); the screw grooves (20) comprise a first end (20a), a second end (20b), and a starting end (20c) located at a center position between the first end (20a) and the second end (20b), wherein a first groove track (21) is formed between the starting end (20c) and the first end (20a), and a second groove track (22) is formed between the starting end (20c) and the second end (20b); the first groove track (21) has a length of transverse extension smaller than that of the second groove track (22).

2. A variable pitch module as claimed in claim 1, characterized in that: a tensioning wheel (35) is arranged on the fixing base (30) and abuts against the transmission belt (34).

3. The variable distance module of claim 1, wherein: bearing seats (11) are fixed at both ends of the slide rail (1), bearings are arranged in the bearing seats, and both ends of the screw rod (2) are provided with shaft portions matched with the bearings.

4. The variable distance module of claim 1, wherein: a protective cover (100) is fixedly arranged on the fixing base (30).

5. The variable distance module of claim 1, wherein: linear guides (12) are arranged at both sides of the slide rail (1) located at the strip-shaped opening, and clamping blocks (41) slidably matched with the linear guides are detachably arranged at both sides of the slide blocks (4).

6. A variable pitch module as claimed in claim 5, wherein: a protruding block (42) is protrudingly arranged at a middle position of the slide block (4), and the guide member (40) is arranged on the protruding block (42).

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