A multi-start variable pitch cam roller reduction mechanism

Abstract

The utility model relates to cam roller reduction mechanism field especially relates to a multi -head variable -pitch cam roller reduction mechanism, and the outer wall of turret is fixedly installed with a plurality of rollers, and the multi -head variable -pitch cam and turret are connected through the roller transmission between, the roller includes roller axle core, and the roller axle core is fixedly installed on the turret, and all through the roller roller needle sleeve setting installation of rotating roller shaft sleeve is equipped on the roller axle core, in the utility model, through adopting multi -head variable -pitch cam and by the roller axle core, roller needle and roller shaft sleeve constitute the meshing of roller, and utilize the multi -curved surface variable -pitch design and make the roller be ridge surface envelope, to realize the no -gap meshing transmission between multi -head variable -pitch cam and turret, eliminates the reverse clearance and improves transmission accuracy, and through multi -head cam design can improve the rotational speed of output to turret to improve transmission efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of cam roller reduction mechanisms, and in particular to a multi-head variable pitch cam roller reduction mechanism. Background Technology

[0002] In high-precision transmission fields such as CNC machining, industrial robots, and automated assembly, the reduction mechanism, as a core functional component, directly determines the accuracy, efficiency, rigidity, and stability of the equipment. Traditional reduction schemes often have certain drawbacks in use, such as: Existing worm gear structures have large reduction ratios, low transmission efficiency, and backlash. Ordinary cam-roller structures have large transmission ratios but low output speeds within limited space. Increasing the speed would require reducing the number of rollers and the corresponding cam ridges, which would severely reduce the rigidity and stability of the cam-roller transmission structure.

[0003] This makes it impossible for existing technologies to simultaneously guarantee high speed and high stability. They either exhibit low efficiency, like worm gears, or high speed but poor stability, like ordinary cam rollers. Therefore, there is an urgent need for a multi-head variable-pitch cam roller reduction mechanism that can simultaneously achieve both high speed and high stability. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a multi-head variable pitch cam roller reduction mechanism.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A multi-start variable pitch cam roller reduction mechanism includes a multi-start variable pitch cam and a turret, wherein multiple rollers are fixedly installed on the outer wall of the turret, and the multi-start variable pitch cam and the turret are connected by roller transmission. The roller includes a roller shaft core, which is mounted on a turret, and each roller shaft core is fitted with a rotating roller sleeve through a roller needle sleeve. The ends of the multi-head variable pitch cams are all equipped with drive shafts, and their convex ridge surfaces all adopt a multi-curved variable pitch design. The roller bushing is adapted to mesh with the convex ridge surface of the multi-start variable pitch cam.

[0006] In addition, in a preferred configuration, the roller shaft is fixedly mounted on the turret by a side set screw.

[0007] In addition, in a preferred configuration, a roller needle is fitted onto the roller shaft core, and a roller bushing is fitted onto the roller needle.

[0008] The beneficial effects of this utility model are as follows: by using a multi-head variable pitch cam to mesh with a roller consisting of a roller shaft core, roller needles and roller bushings, and by using a multi-curved variable pitch design to make the rollers covered by convex ridges, the backlash-free meshing transmission between the multi-head variable pitch cam and the turret is realized, eliminating backlash and improving transmission accuracy. Furthermore, the multi-head cam design can increase the speed output to the turret, thereby improving transmission efficiency. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of a multi-head variable pitch cam roller reduction mechanism proposed in this utility model; Figure 2 for Figure 1 A schematic diagram of the planar structure in the diagram; Figure 3 for Figure 1 Internal cross-sectional view; Figure 4 This is a schematic diagram of the structure of the multi-head variable pitch cam proposed in this utility model.

[0010] In the diagram: 1. Multi-head variable pitch cam, 2. Roller, 21. Roller shaft, 22. Roller needle roller, 23. Roller bushing, 3. Turret. Detailed Implementation

[0011] 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.

[0012] Reference Figure 1-4 A multi-start variable-pitch cam roller reduction mechanism includes a multi-start variable-pitch cam 1 and a turret 3. Multiple rollers 2 are fixedly mounted on the outer wall of the turret 3, and the multi-start variable-pitch cam 1 and the turret 3 are connected by a transmission via the rollers 2. Each roller 2 includes a roller shaft 21, which is fixedly mounted on the turret 3. Rotating roller sleeves 23 are fitted onto each roller shaft 21 via roller needles 22.

[0013] The roller shaft core 21 is fixedly mounted on the turret 3 by side set screws. The side set screws ensure stable mounting of the roller shaft core 21, thereby guaranteeing stable transmission to the turret 3.

[0014] The multi-head variable pitch cam 1 has a drive shaft mounted on each end, and its convex ridge surface adopts a multi-curved variable pitch design. The drive shaft on the multi-head variable pitch cam 1 is connected to an external drive unit to drive the multi-head variable pitch cam 1 to rotate.

[0015] The roller bushing 23 is fitted and engaged with the convex ridge surface of the multi-start variable pitch cam 1. When the multi-start variable pitch cam 1 rotates, it drives the roller 2 to achieve rotational friction.

[0016] Among them, roller needles 22 are sleeved on the roller shaft core 21, and roller bushings 23 are sleeved on the roller needles 22.

[0017] In this embodiment, rollers 2 are installed on the turret 3. Rollers 2 consist of a roller shaft 21, roller needles 22, and roller sleeves 23. The roller sleeves 23 mesh with the convex ridge surface of the multi-pitch cam 1. When the multi-pitch cam 1 rotates, it drives the rollers 2 to achieve rolling friction. At this time, the roller sleeves 23 will be subjected to force and rotate around their own axis. Furthermore, the roller shaft 21 is fixed to the turret by side set screws, which means that when the roller sleeves 23 rotate, they will drive the turret 3 to rotate.

[0018] Furthermore, unlike traditional cam rollers, this solution employs a multi-start variable-pitch cam. The multi-curved variable-pitch design ensures that the roller 2 is completely enveloped by the convex ridges on the multi-start variable-pitch cam 1, forming a backlash-free meshing transmission. This results in smooth transmission, high efficiency, strong rigidity, and output speeds that are one to several times higher than traditional structures.

[0019] In this invention, a multi-head variable pitch cam 1 is used to mesh with a roller 2 consisting of a roller shaft core 21, a roller needle 22, and a roller bushing 23. The multi-curved variable pitch design makes the roller 2 covered by convex ridges, thereby achieving a backlash-free meshing transmission between the multi-head variable pitch cam 1 and the turret 3. This eliminates backlash and improves transmission accuracy. Furthermore, the multi-head cam design can increase the rotational speed output to the turret 3, thereby improving transmission efficiency.

[0020] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A multi-start variable-pitch cam roller reduction mechanism, comprising a multi-start variable-pitch cam (1) and a turret (3), characterized in that, Multiple rollers (2) are fixedly installed on the outer wall of the turret (3), and the multi-head variable pitch cam (1) and the turret (3) are connected by the rollers (2) through transmission. The roller (2) includes a roller core (21), which is mounted on the turret (3), and a rotating roller sleeve (23) is fitted on the roller core (21) through a roller needle (22). The ends of the multi-head variable pitch cam (1) are all equipped with drive shafts, and their convex ridge surfaces are all designed with multi-curved variable pitch. The roller bushing (23) is adapted to mesh with the convex ridge surface of the multi-head variable pitch cam (1).

2. The multi-head variable-pitch cam roller reduction mechanism according to claim 1, characterized in that, The roller shaft core (21) is fixedly installed on the turret (3) by a side set screw.

3. The multi-head variable-pitch cam roller reduction mechanism according to claim 1, characterized in that, The roller shaft core (21) is fitted with a roller needle (22), and the roller needle (22) is fitted with a roller bushing (23).

Images