Adjustable oil press

Abstract

The application relates to the technical field of oil processing machinery, in particular to an adjustable oil pressing device. The device comprises a base, a driving motor, a pressing cavity, a pressing rod, a pressing rod transmission shaft and a gap adjusting mechanism. The driving motor is fixedly installed on the base. The pressing cavity is detachably connected to one side of the base through fasteners, and a pressing cavity is formed in the pressing cavity. The pressing rod is detachably accommodated in the pressing cavity. The pressing rod transmission shaft is axially slidably supported in the base, one end of the pressing rod transmission shaft is axially connected to the tail end of the pressing rod through a non-circular cross-section structure matched with each other, and torque can be transmitted. The shaft body of the pressing rod transmission shaft is connected with the output shaft of the driving motor through a spline pair or a key groove structure, so that the pressing rod transmission shaft can be axially displaced while transmitting rotary power. The oil pressing device can effectively overcome the existing defects, improve the flexibility and stability of the oil pressing process, reduce the maintenance cost, and bring higher production value and market potential for small oil pressing applications.

Description

Technical Field

[0001] This application relates to the field of oil processing machinery technology, and in particular to an adjustable oil pressing device. Background Technology

[0002] Currently, small or micro oil presses widely employ adjustable pressing devices. These devices typically consist of a pressing chamber and a pressing rod inserted into it. The gap between these two components is adjusted to accommodate the pressing needs of different oilseeds. Existing technologies do offer gap adjustment functions, such as manual adjustment via threads or shims, aiming to prevent jamming between the pressing rod and the pressing chamber due to excessively small gaps, or reduced oil yield and excessive residue due to excessively large gaps. While this adjustment mechanism improves the adaptability of the oil press to some extent, its design often relies on multiple interconnected components, such as complex locking mechanisms, making the overall structure rather cumbersome.

[0003] While existing adjustment devices can achieve basic gap control, their operation typically requires the oil press to be stopped, and the adjustment structure is complex, involving disassembly or tool assistance, making dynamic implementation during oil pressing impossible. This is mainly because the adjustment points in existing designs are mostly located at the front of the pressing chamber, requiring an interruption of operation and potentially facing high temperatures or oily environments, increasing operational risks and time costs. Furthermore, the complex mechanical parts are prone to wear or blockage due to oil residue, further reducing the accuracy and reliability of the adjustment. These shortcomings not only affect oil pressing efficiency but can also lead to inaccurate gap control, causing common problems such as press rod jamming or incomplete oil extraction. The root cause lies in the fact that existing technology relies too heavily on static adjustment schemes and fails to fully consider the real-time needs of continuous production, thus limiting the practicality and economy of small oil presses.

[0004] Therefore, developing a new type of adjustable oil pressing device is of great practical significance. Utility Model Content

[0005] The purpose of this application is to overcome at least one deficiency of the prior art and provide an adjustable oil pressing device. This oil pressing device can effectively overcome the existing deficiencies by simplifying the adjustment structure and realizing dynamic adjustment at the back end, thereby improving the flexibility and stability of the oil pressing process, reducing maintenance costs, and bringing higher production value and market potential to small-scale oil pressing applications.

[0006] To achieve the above objectives, this application discloses an adjustable oil pressing device, which includes a base, a drive motor, a pressing chamber, a pressing rod, a pressing rod transmission shaft, and a gap adjustment mechanism.

[0007] The drive motor is fixedly mounted on the base. The pressing chamber is detachably connected to one side of the base by fasteners, and a pressing cavity is formed inside it. The pressing rod is detachably housed inside the pressing cavity.

[0008] The press rod drive shaft is axially slidably supported inside the base. One end of the shaft is axially connected to the tail end of the press rod through a mating non-circular cross-section structure, enabling torque transmission. The shaft body of the press rod drive shaft is connected to the output shaft of the drive motor through a spline pair or keyway structure, thus allowing the press rod drive shaft to move axially while transmitting rotational power.

[0009] The gap adjustment mechanism is located on the side of the base opposite to the pressing chamber, and includes a fixed base, an adjusting screw, and an operating handwheel. The fixed base is fixedly installed on the base and has a threaded hole inside. The adjusting screw and the threaded hole of the fixed base form a threaded pair, and the operating handwheel is fixedly installed on the outer end of the adjusting screw. Rotating the operating handwheel can drive the adjusting screw to rotate and generate axial feed, so that its inner end directly or indirectly abuts against the end of the pressing rod drive shaft through a thrust bearing, thereby pushing the pressing rod drive shaft and the pressing rod connected thereto to move axially, realizing the precise adjustment of the working gap between the pressing rod and the inner wall of the pressing chamber.

[0010] Preferably, the threaded pair adopts a trapezoidal thread with self-locking function. By reasonably designing the thread helix angle and friction coefficient, the static friction self-locking torque of the threaded pair is made greater than the maximum axial thrust experienced by the press rod during operation, thereby achieving reliable self-locking in the non-adjustment state and avoiding unexpected changes in the clearance.

[0011] To further improve assembly convenience and alignment accuracy, the feed end of the pressing chamber is machined into a tapered flared structure, facilitating smooth insertion of the pressing rod during installation. The outer surface of the pressing rod and the inner wall of the pressing chamber are respectively provided with matching spiral oil-pressing threads, which, when the pressing rod rotates, can compress and transport the oilseeds, achieving continuous oil extraction.

[0012] Compared with the prior art, this application has at least one of the following beneficial technical effects: 1. It achieves convenient and precise gap adjustment during operation. Through an independent adjustment mechanism located on the rear side of the base, the fit gap between the press rod and the pressing chamber can be dynamically and precisely adjusted without interrupting the pressing process or disassembling parts, effectively improving the adaptability of the equipment and the oil extraction efficiency.

[0013] 2. The structure is simplified and the reliability of adjustment is enhanced. The self-locking trapezoidal thread pair directly drives the press rod transmission shaft, eliminating the need for complex locking and linkage components. The structure is compact and can automatically lock the gap, preventing gap changes caused by axial force impact during operation, thus improving operational stability and safety.

[0014] 3. Effectively reduces the risk of jamming and facilitates maintenance. The conical flare structure at the inlet of the pressing chamber facilitates the installation and alignment of the pressing rod. Combined with the axially sliding transmission connection, it significantly reduces the risk of jamming during assembly and adjustment, while also making the disassembly and cleaning of key components more convenient.

[0015] The beneficial effects listed above are not exhaustive of all advantages. Other potential beneficial effects and detailed technical implementation methods will be further disclosed in the embodiments or other descriptive sections of this application. Attached Figure Description

[0016] A better understanding of various aspects of this disclosure will be achieved by reading the following detailed description in conjunction with the accompanying drawings. The positions, dimensions, and extents of the structures shown in the drawings, etc., do not always represent actual positions, dimensions, and extents. In the drawings: Figure 1 This is a schematic diagram of the overall structure of one embodiment disclosed in this application.

[0017] Figure 2 This is a schematic diagram of the structure of the pressing chamber in one embodiment of this application.

[0018] Figure 3 This is a schematic diagram of the structure of the press rod in one embodiment of this application.

[0019] Figure 4 This is a schematic diagram of the structure of the press rod drive shaft in one embodiment of this application.

[0020] Figure 5 This is a schematic diagram of the gap adjustment mechanism in one embodiment of the present application. Detailed Implementation

[0021] The present disclosure will now be described with reference to the accompanying drawings, which illustrate several embodiments of the present disclosure. However, it should be understood that the present disclosure can be presented in many different ways and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the disclosure more complete and to fully illustrate the scope of protection of the present disclosure to those skilled in the art. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide further additional embodiments.

[0022] It should be understood that the same reference numerals denote the same elements in all the accompanying drawings. For clarity, the dimensions of certain features may be modified in the drawings.

[0023] It should be understood that the terminology used in this specification is for describing specific embodiments only and is not intended to limit this disclosure. All terms used in this specification (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. For the sake of brevity and / or clarity, techniques, methods, and devices known to those skilled in the art may not be discussed in detail; however, where appropriate, such techniques, methods, and devices should be considered part of this specification.

[0024] Unless otherwise specified, the singular forms “a,” “the,” and “the” used in this specification include the plural forms. The terms “comprising,” “including,” and “containing” used in this specification indicate the presence of the claimed feature but do not exclude the presence of one or more other features. The term “and / or” used in this specification includes any and all combinations of one or more of the relevant listed items.

[0025] This embodiment provides an adjustable oil pressing device; please refer to [link / reference]. Figure 1 The diagram illustrates the overall structure of an embodiment of this application. The device includes a base 1, a drive motor 2, a pressing chamber 3, a pressing rod 4, a pressing rod drive shaft 5, and a gap adjustment mechanism 6. The base 1 constitutes the main support structure of the device, used to install and support the various functional components.

[0026] The drive motor 2 is fixedly mounted to the rear of the base 1 by bolts.

[0027] Please refer to the following: Figure 2 The pressing chamber 3 is generally cylindrical and is detachably mounted to the front side of the base 1 by means of a detachable fitting structure or a plurality of circumferentially arranged fastening bolts. The interior of the pressing chamber 3 forms a pressing cavity that runs through the center along the axial direction.

[0028] In this embodiment, the pressing chamber 3 is provided with a feed inlet, an oil outlet, and a residue outlet. It is understood that the feed inlet is used to feed in oilseeds, the oil outlet is used to collect the oil produced by pressing, and the residue outlet is used to discharge the residue after pressing. The specific location, shape, and size design of these interfaces are conventional existing designs in the art, and those skilled in the art can make conventional settings according to actual needs, so their specific structures will not be described in detail.

[0029] Please see Figure 3 The pressing rod 4 is a generally cylindrical structure, which is detachably housed inside the pressing chamber, and its outer diameter is slightly smaller than the inner diameter of the pressing chamber, thereby forming an annular gap between the two for pressing oilseeds.

[0030] To achieve power transmission and clearance adjustment functions, please refer to [link / reference]. Figure 4The press rod drive shaft 5 is axially slidably supported in a bearing seat provided inside the base 1. One end of the press rod drive shaft 5 extends toward the press chamber 3 and forms a non-circular cross-section insertion part.

[0031] Accordingly, a non-circular cross-section insertion groove is provided at the tail end of the press rod 4. The insertion part of the press rod drive shaft 5 can be slidably inserted into the insertion groove of the press rod 4, thereby forming a reliable connection that can transmit torque and slide axially relative to each other.

[0032] Furthermore, the shaft body of the press rod drive shaft 5 is machined with external splines, and a coupling with internal splines is correspondingly installed on the output shaft of the drive motor 2. Through the connection of this spline pair, the rotational power of the drive motor 2 can be transmitted to the press rod drive shaft 5, while allowing the press rod drive shaft 5 to move axially.

[0033] Please see Figure 5 The gap adjustment mechanism 6 is located on the rear side of the base 1, specifically between the drive motor 2 and the press rod drive shaft 5. The gap adjustment mechanism 6 includes a fixed base, an adjusting screw, and an operating handwheel. The fixed base is fixed to the rear end face of the base 1 by welding or bolting, and has an internally threaded hole machined at its center. The adjusting screw mates with the internally threaded hole of the fixed base, forming a precision threaded pair. The operating handwheel is fixedly installed at the end of the adjusting screw that extends beyond the fixed base. When the operator rotates the operating handwheel, the adjusting screw rotates. Based on the transmission principle of the threaded pair, the adjusting screw generates axial feed motion while rotating. The end of the adjusting screw facing the press rod drive shaft 5 is its inner end, which can directly abut against the rear end face of the press rod drive shaft 5. In a preferred embodiment, a thrust bearing is also provided between the inner end of the adjusting screw and the end face of the press rod drive shaft 5 to reduce frictional resistance during relative rotation. With the above structure, when the adjusting screw moves axially, its inner end contacts and pushes the press rod drive shaft 5 through the end face, thereby driving the press rod 4 to move axially in the press chamber, thereby realizing precise and continuous adjustment of the pressing working gap.

[0034] To ensure the adjusted gap remains stable during operation, the threaded pair preferably uses a trapezoidal thread with self-locking properties. By rationally designing the helix angle of this trapezoidal thread and its friction coefficient with the mating parts, the self-locking frictional torque generated by the threaded pair under static conditions can be made greater than the maximum reverse axial thrust borne by the press rod 4 during pressing. Accordingly, without manual rotation of the operating handwheel, the position of the adjusting screw can be automatically locked, effectively preventing the press rod 4 from retracting due to working resistance and ensuring the stability of the working gap.

[0035] To further optimize the ease of assembly and performance of the device, please refer to [link / reference needed]. Figure 2 The feed end of the pressing chamber 3, that is, the end furthest from the base 1, has a tapered flared structure machined at its inlet. The larger opening of this tapered flared opening faces outward, and its inner diameter gradually and smoothly decreases along the axial direction to match the standard inner diameter of the pressing chamber. This structure can effectively guide the end of the pressing rod 4 smoothly into the pressing chamber and achieve automatic centering when installing the pressing rod 4, significantly reducing the assembly difficulty.

[0036] In addition, please refer to Figure 2 and Figure 3 The outer cylindrical surface of the press rod 4 and the inner wall of the pressing chamber are respectively machined with matching helical oil-pressing threads. When the press rod 4 rotates under the drive of the drive motor 2, these two sets of meshing helical threads will form a pressing space with a volume that gradually decreases along the pushing direction. This allows for continuous and effective squeezing, shearing, and pushing of the oilseeds fed into the pressing chamber 3, thereby gradually squeezing out the oil. The squeezed-out oil finally flows out through the oil discharge gaps provided on the inner wall of the pressing chamber 3, achieving the goal of efficient oil extraction.

[0037] In the detailed description of the embodiments of this application, the technical features that distinguish it from the prior art are highlighted to emphasize the innovative nature of this application. It is understood that the overall structure, installation, and operation of the device also involve other components and conventional steps not detailed herein, such as the specific selection and control circuit of the drive motor, the standard specifications and tightening torque of the fasteners (e.g., bolts), the specific structural form of the bearing housing, and auxiliary systems such as the heating and insulation of the pressing chamber. Such content not disclosed in detail belongs to well-known or existing technologies that can be selected, designed, and implemented by those skilled in the art based on ordinary technical knowledge in the field, according to actual application scenarios and conventional design principles (such as mechanical design manuals, national standards, etc.), and therefore will not be elaborated upon further.

[0038] It should be specifically noted that the specific embodiments described herein are merely preferred embodiments of this application, intended to help those skilled in the art thoroughly understand the technical solutions of this application. Their purpose is to clearly illustrate how this application is implemented, and not to constitute any limitation on the scope of protection of this application. Within the spirit and principles of the technical solutions of this application, any simple modifications, equivalent substitutions, or variations made by those skilled in the art based on the content disclosed in this application and in combination with common knowledge and conventional methods in the field, such as equivalent transformations of the specific mechanical structure of the gap adjustment mechanism, should be included within the scope of protection of the claims of this application.

Claims

1. An adjustable oil pressing device, characterized in that, Includes a base, drive motor, pressing chamber, pressing rod, pressing rod drive shaft, and gap adjustment mechanism; The drive motor is fixedly mounted on the base; The pressing chamber is detachably connected to one side of the base by fasteners, and a pressing cavity is formed inside it; The press rod is detachably housed inside the press chamber; The press rod drive shaft is axially slidably supported inside the base. One end of the shaft is axially connected to the tail end of the press rod through a non-circular cross-section structure that matches each other, and it can transmit torque. The shaft of the press rod drive shaft is connected to the output shaft of the drive motor through a spline pair or keyway structure, thereby allowing the press rod drive shaft to move axially while transmitting rotational power; The gap adjustment mechanism is located on the side of the base away from the pressing chamber, and includes a fixed base, an adjusting screw, and an operating handwheel; The fixing seat is fixedly installed on the base and has a threaded hole inside; The adjusting screw and the threaded hole of the fixed seat form a threaded pair, and the operating handwheel is fixedly installed on the outer end of the adjusting screw; Rotating the handwheel can drive the adjusting screw to rotate and generate axial feed, so that its inner end directly or indirectly abuts against the end of the press rod drive shaft through the thrust bearing, thereby pushing the press rod drive shaft and the press rod connected to it to move axially, so as to achieve precise adjustment of the working gap between the press rod and the inner wall of the press chamber.

2. The adjustable oil pressing device according to claim 1, characterized in that, The threaded pair adopts a trapezoidal thread with self-locking function.

3. The adjustable oil pressing device according to claim 1, characterized in that, The feed end of the pressing chamber is machined into a conical flared structure.

4. The adjustable oil pressing device according to claim 1, characterized in that, The outer surface of the press rod and the inner wall of the press chamber are respectively provided with mutually matching spiral oil pressing threads.

Images