A swing transmission structure and a spraying machine adopting the same

Abstract

The utility model discloses a kind of swing transmission structures, including shell, power rotary table, outer gear frame, inner gear, drive rod;Power rotary table is rotatably installed in shell, outer gear frame is fixedly connected with shell, inner gear is installed in power rotary table, inner gear can be rotated relative to power rotary table, the central axis of inner gear and power rotary table is not in same straight line, eccentric installation is set;Inner gear and outer gear frame are driven by being set gear meshing between, inner gear is provided with connecting rod, connecting rod is fixed on inner gear, its end portion is rotatably hinged with drive rod, drive rod passes through from shell, is limited only can slide along self central axis L direction.The utility model also discloses a kind of spraying machine.The utility model uses swing transmission structure, solve the existing structure and the eccentric shaft stress of plunger pump association is cantilever, the problem of bad stress, guarantee precision, with the advantages of high output pressure, large flow, long service life, manufacturing and maintenance are convenient.

Description

Technical Field

[0001] This utility model relates to the field of spraying machine transmission technology, and in particular to a rotary transmission structure and a spraying machine using the structure. Background Technology

[0002] A spray painting machine is a specialized coating equipment that utilizes spray painting technology. The transmission structure is a crucial part of a spray painting machine. Traditional axial piston pumps typically use an electric motor that drives an eccentric wheel via a gear transmission mechanism. The eccentric shaft on the eccentric wheel is connected to the piston of the axial piston pump via a connecting rod. The rotation of the electric motor is converted into the reciprocating motion of the piston, achieving the liquid pressure delivery of the pump. However, the traditional axial piston pump structure suffers from an unreasonable design, where the eccentric shaft connected to the pump experiences cantilevered stress. When conveying high-viscosity liquids, the stress on the eccentric shaft increases, making it prone to deformation, jamming, and in severe cases, rendering the axial piston pump unusable. Therefore, a new structure is needed to address the shortcomings of the existing design. Summary of the Invention

[0003] The purpose of this invention is to solve the problems mentioned in the background art and to provide a rotary transmission structure and a spraying machine using the structure.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: A rotary transmission structure includes a housing, a power turntable, an external gear carrier, an internal gear, and a drive rod. The power turntable is rotatably mounted in the housing, the external gear carrier is fixedly connected to the housing, and the internal gear is mounted on the power turntable and can rotate relative to the power turntable. The central axes of the internal gear and the power turntable are not on the same straight line and are eccentrically mounted. The internal gear and the external gear carrier are driven by meshing gear teeth. A connecting rod is provided on the internal gear, and the connecting rod is fixed to the internal gear. Its end is rotatably hinged to the drive rod. The drive rod passes through the housing and is restricted to sliding only along its own central axis L. The power turntable drives the internal gear to move around the inner circumference of the external gear carrier. The internal gear rotates, and the end of the connecting rod on it reciprocates in the direction of the central axis L of the drive rod, thereby driving the drive rod to reciprocate in the direction of its central axis L.

[0005] In the aforementioned rotary transmission structure, a positioning frame is provided on the housing, and a positioning hole is provided on the positioning frame for the drive rod to pass through. The positioning hole and the drive rod are on the same central axis, and the drive rod reciprocates along its own central axis L through the positioning effect of the positioning hole.

[0006] In the aforementioned rotary transmission structure, a positioning sleeve is provided at the positioning hole, and the positioning sleeve and the positioning hole are arranged on the same central axis, with the drive rod passing through the positioning sleeve.

[0007] In the aforementioned rotary transmission structure, a rotary bearing is provided between the power turntable and the housing, and the power turntable and the housing are respectively installed and connected to the inner and outer rings of the rotary bearing.

[0008] In the aforementioned rotary transmission structure, the power turntable has multiple supports, and the internal gear is rotatably mounted on the supports.

[0009] In the aforementioned rotary transmission structure, the power turntable is rotatably connected to the housing via a rotating shaft, and the rotating shaft is connected to an external power source for transmission.

[0010] In the aforementioned rotary transmission structure, a crank handle is connected to the rotating shaft.

[0011] In one of the above-mentioned rotary transmission structures, the external gear carrier is disposed on the side of the power turntable.

[0012] In the aforementioned rotary transmission structure, a mounting rod is provided on the connecting rod, and a mounting hole is provided at the end of the drive rod. This utility model also provides a spraying machine, including a plunger device, which includes the above-mentioned rotary transmission structure. The piston rod in the plunger device is connected to the drive rod in the rotary transmission structure via a coupling.

[0013] The advantages of this utility model: This utility model adopts a swing-type transmission structure, which solves the problem that the eccentric shaft connected to the plunger pump in the existing structure is cantilevered and has poor force distribution, ensuring accuracy and having the advantages of high output pressure, large flow rate, long service life, and convenient manufacturing and maintenance. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the conventional technology, the drawings used in the description of the embodiments or the conventional technology 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.

[0015] Figure 1 This is a schematic diagram of the connection between the spraying machine and the swing-type transmission structure in this utility model; Figure 2 This is an exploded view of the rocking transmission structure (including the crank handle) in this utility model; Figure 3 This is an exploded view of the swing-type transmission structure (excluding the crank handle) in this utility model; Figure 4 This is a three-dimensional schematic diagram of the swing-type transmission structure (including the crank handle) in this utility model; Figure 5 This is a three-dimensional schematic diagram of the swing-type transmission structure (excluding the crank handle) in this utility model. Detailed Implementation

[0016] To make the above-mentioned objects, 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. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0017] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this specification are for illustrative purposes only and do not represent the only possible implementation.

[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0019] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0020] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this specification belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0021] Please see Figure 1 The present invention provides a spraying machine, which includes a plunger device 19 and a rotary transmission structure 21. The piston rod 20 in the plunger device 19 is connected to the drive rod in the rotary transmission structure via a coupling 17. Please see Figures 2 to 5 A rotary transmission structure includes a housing 1, a power turntable 2, an external gear carrier 3, an internal gear 4, and a drive rod 5. The power turntable 2 is rotatably mounted in the housing 1, the external gear carrier 3 is fixedly connected to the housing 1, and the internal gear 4 is mounted on the power turntable 2 and can rotate relative to the power turntable 2. The central axes of the internal gear 4 and the power turntable 2 are not on the same straight line and are eccentrically mounted. The internal gear 4 and the external gear carrier 3 are driven by meshing gear teeth. A connecting rod 6 is provided on the internal gear 4, and the connecting rod 6 is fixed on the internal gear 4. Its end is rotatably hinged to the drive rod 5. The drive rod 5 passes through the housing 1 and is restricted to sliding only along its own central axis L. The power turntable 2 drives the internal gear 4 to move around the inner circumference of the external gear carrier 3. The internal gear 4 rotates, and the end of the connecting rod 6 on it moves back and forth in the direction of the central axis L of the drive rod 5. The connecting rod 6 drives the drive rod 5 to move back and forth in the direction of its central axis L.

[0022] Furthermore, the housing 1 is provided with a positioning frame 7, and the positioning frame 7 is provided with a positioning hole 8 for the drive rod 5 to pass through. The positioning hole 8 is coaxial with the drive rod 5, and the drive rod 5 reciprocates along its own central axis L through the positioning effect of the positioning hole 8.

[0023] Furthermore, a positioning sleeve 9 is provided at the positioning hole 8. The positioning sleeve 9 is arranged on the same central axis as the positioning hole 8, and the drive rod 5 passes through the positioning sleeve 9. This can better reduce the friction of the drive rod 5 and improve its service life.

[0024] Furthermore, in order to better ensure the rotation of the power turntable 2, a rotating bearing 10 is provided between the power turntable 2 and the housing 1, and the power turntable 2 and the housing 1 are respectively installed and connected to the inner and outer rings of the rotating bearing 10.

[0025] Furthermore, the power turntable 2 has multiple brackets 11, and the internal gear 4 is rotatably mounted on the brackets 11. The power turntable 2 is designed to be lightweight, which reduces the loss of driving power.

[0026] Specifically, the power turntable 2 is rotatably connected to the housing 1 via a rotating shaft 15, and the rotating shaft 15 is connected to an external power source for transmission. For example... Figure 2 In one embodiment, a crank handle 12 is connected to the rotating shaft 15, which can be manually driven in different situations and used in various working environments.

[0027] Preferably, the external gear frame 3 is disposed on the side of the power turntable 2, so that the external gear frame 3 provides a certain degree of protection against falling off the power turntable 2 and improves the safety of use.

[0028] Furthermore, the connecting rod 6 is provided with a mounting rod 13, and the end of the driving rod 5 is provided with a mounting hole 14, thereby better realizing the rotational connection of the drive.

[0029] The working principle of this utility model is as follows: When the power turntable 2 is driven to start rotating, the power turntable 2 will drive the internal gear 4 to make a circular motion along the external gear frame 3. At the same time, the internal gear 4 will rotate on its own axis. When the internal gear 4 rotates, its end moves back and forth in the direction of the central axis L of the drive rod 5, thereby driving the drive rod 5 to move back and forth in the direction of its central axis L through the connecting rod 6. Finally, the reciprocating motion of the drive rod 5 drives the piston device 19 to work.

[0030] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0031] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the patent protection scope of this utility model should be determined by the appended claims.

Claims

1. A rotary transmission structure, characterized in that: The system includes a housing (1), a power turntable (2), an external gear carrier (3), an internal gear (4), and a drive rod (5). The power turntable (2) is rotatably mounted in the housing (1), the external gear carrier (3) is fixedly connected to the housing (1), and the internal gear (4) is mounted on the power turntable (2). The internal gear (4) can rotate relative to the power turntable (2), and the central axes of the internal gear (4) and the power turntable (2) are not on the same straight line. The internal gear (4) and the external gear carrier (3) are connected by gear meshing. The internal gear (4) is provided with a connecting rod (6), which is fixed on the internal gear (4) and its end is rotatably hinged to the drive rod (5). The drive rod (5) passes through the housing (1) and is restricted to sliding only along its own central axis L. The power turntable (2) drives the internal gear (4) to move around the inner circle of the external gear carrier (3). The internal gear (4) rotates and the end of the connecting rod (6) on it moves back and forth in the direction of the central axis L of the drive rod (5). The connecting rod (6) drives the drive rod (5) to move back and forth in the direction of its central axis L.

2. The rotary transmission structure according to claim 1, characterized in that: The housing (1) is provided with a positioning frame (7), and the positioning frame (7) is provided with a positioning hole (8) for the drive rod (5) to pass through. The positioning hole (8) and the drive rod (5) are on the same central axis. The drive rod (5) moves back and forth along its own central axis L through the positioning effect of the positioning hole (8).

3. The rotary transmission structure according to claim 2, characterized in that: A positioning sleeve (9) is provided at the positioning hole (8). The positioning sleeve (9) and the positioning hole (8) are arranged on the same central axis. The driving rod (5) passes through the positioning sleeve (9).

4. The rotary transmission structure according to claim 1, characterized in that: A rotating bearing (10) is provided between the power turntable (2) and the housing (1), and the power turntable (2) and the housing (1) are respectively connected to the inner and outer rings of the rotating bearing (10).

5. The rotary transmission structure according to claim 1, characterized in that: The power turntable (2) has multiple brackets (11), and the internal gear (4) is rotatably mounted on the brackets (11).

6. The rotary transmission structure according to claim 4, characterized in that: The power turntable (2) is rotatably connected to the housing (1) via a rotating shaft (15), and the rotating shaft (15) is connected to an external power source for transmission.

7. The rotary transmission structure according to claim 6, characterized in that: A crank handle (12) is connected to the rotating shaft (15).

8. The rotary transmission structure according to claim 1, characterized in that: The external gear carrier (3) is located on the side of the power turntable (2).

9. The rotary transmission structure according to claim 1, characterized in that: The connecting rod (6) is provided with a mounting rod (13), and the end of the driving rod (5) is provided with a mounting hole (14).

10. A spraying machine, comprising a plunger device (19), characterized in that: The rotary transmission structure (21) according to any one of claims 1 to 9 is provided, wherein the piston rod (20) in the plunger device (19) is connected to the drive rod in the rotary transmission structure via a coupling (17).

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