A hollow direct-drive torque motor with a detachable structure

Abstract

The present invention discloses a hollow direct-drive torque motor with a detachable structure, comprising: a motor body (1), a motor shaft (2), an adapter assembly (3) and a motor driver; a stop nut (5) is provided between the motor shaft (2) and the motor body (1), and the adapter assembly (3) and the motor shaft (2) are connected and fixed by a connecting bolt (4). The hollow direct-drive torque motor with a detachable structure of the present invention can directly remove the adapter assembly (3) and the connecting unit of the adapter connected thereto from the motor shaft (2) without disassembling the original mechanical structure and the heating and cooling equipment, or only remove the connecting unit of the adapter from the adapter assembly (3). This makes the disassembly, maintenance and replacement of the adapter more flexible and convenient, which not only saves a lot of product production line operation and maintenance time and costs, improves production efficiency, but also effectively reduces operation and management costs.

Description

Technical Field

[0001] The patent of this invention belongs to the field of motor design, and specifically relates to a hollow direct-drive torque motor with a detachable structure. Background Art

[0002] Direct-drive torque motors mainly refer to motors that directly drive loads without going through transmission devices (such as transmission belts, etc.), saving connection mechanisms such as reduction gearboxes, making the overall mechanism small in size, reliable in operation, and low in noise. In addition, direct-drive torque motors also have the advantages of high precision, high response, and accurate positioning, and are widely used in detection, machine tool and other industries.

[0003] However, the direct-drive torque motor of the prior art can only be connected to an external adapter device, which is driven to work by the motor shaft. The connection method between the motor body and the adapter device is single, and the adapter device can only be connected in sequence at the front end of the motor. This results in the replacement of parts of the adapter device or maintenance. The disassembly process is very troublesome. Taking the extrusion device as an example, the traditional extrusion device production line mainly adopts the traditional servo motor, high-density compact reducer, and extruder connection method. Every time the product line is changed and the extrusion screw is replaced, the head of the extrusion device needs to be removed first, and then the head of the extrusion device is moved forward as a whole, and space for the screw to be pulled out is reserved, and then the extrusion screw is pulled out from the front end of the reducer as a whole. It is not only time-consuming and labor-intensive, but also requires a large amount of plant space. Every time the screw is replaced due to product replacement, it is like a major overhaul of the production line, and a large amount of waste oil, waste liquid, waste gas and other byproducts that pollute the environment are generated. In addition, it is more troublesome that the production line needs to be re-debugged and calibrated after the replacement, and the production process parameters need to be re-debugged and set to meet the needs. That is to say, the existing extrusion production line has certain advantages in meeting the production needs of large quantities of products made from a single raw material. However, in adapting to the new development trend of relying on product innovation and research and development to seize the market, it has gradually exposed disadvantages such as long product line conversion cycle, high operating and maintenance costs, slow research and development and verification of new products, and high costs.

[0004] The root cause of the above problems is that the motor does not have a detachable structure, and the adapter equipment can only be connected in sequence from the front end of the motor, which means that in order to replace a certain mechanical structure, the entire device needs to be disassembled.

[0005] In order to solve the above problems, the present invention is proposed. Summary of the invention

[0006] The hollow direct-drive torque motor of the present invention has a detachable structure. Without disassembling the original mechanical structure and heating and cooling equipment, the adapter assembly 3 and the connecting unit of the adapter connected therein can be directly disassembled from the motor shaft 2 of the motor body 1, or only the connecting unit of the adapter can be disassembled from the adapter assembly 3. This makes the disassembly, maintenance and replacement of the adapter more flexible and convenient, which not only saves a lot of product production line operation and maintenance time and cost expenditure, improves production efficiency, but also effectively reduces operation and management costs.

[0007] The present invention is achieved through the following technical solutions:

[0008] A first aspect of the present invention provides a hollow direct-drive torque motor with a detachable structure, comprising:

[0009] Motor body 1;

[0010] The motor shaft 2 is located inside the motor body 1 and is a hollow structure. A stop nut 5 is provided between the motor shaft 2 and the motor body 1 to prevent the motor shaft 2 from moving axially.

[0011] An adapter assembly 3, which is located in the hollow structure of the motor shaft 2 and is used to be connected to the connecting unit of the adapter. The adapter assembly 3 and the motor shaft 2 are connected and fixed by connecting bolts 4;

[0012] The motor driver drives the motor shaft 2 to rotate and controls the rotation speed of the motor shaft 2; the motor driver is an essential component of the motor in this field, is a standard product, and is installed in the drive control cabinet of the motor.

[0013] By removing the connecting bolt 4, the adapter assembly 3 and the connecting unit of the adapter connected therein can be removed from the motor shaft 2 of the motor body 1 together;

[0014] The connection relationship between the adapter assembly 3 and the connection unit of the adapter inside it can be disassembled, and the connection unit of the adapter can be removed from the adapter assembly 3 separately.

[0015] Among them, the motor body 1 of the hollow direct-drive torque motor with a detachable structure also has a motor stator and rotor assembly 6 inside, wherein the rotor is connected to the motor shaft 2 and rotates simultaneously with the motor shaft. This design is a common design in the field.

[0016] Preferably, the adapter assembly 3 further includes a water-cooling tie rod 7, which is connected to a water-cooling joint 8 outside the motor body 1, so as to supply cooling water to the adapter (extrusion screw N2 of the extruder) connected inside the adapter assembly 3 for cooling;

[0017] The water-cooling rod 7 and the adapter assembly 3 are connected and fixed by a water-cooling rod locking nut 9. During the disassembly process, the water-cooling rod 7 can be directly removed from the adapter assembly 3 after the water-cooling joint 8 and the water-cooling rod locking nut 9 are removed.

[0018] Preferably, the motor body 1 also has a thrust bearing 10 and a deep groove ball bearing 11, the thrust bearing 10 is arranged at the front end of the motor body 1, and the deep groove ball bearing 11 is arranged at the rear end of the motor body 1, both of which are located on the outside of the motor shaft 2 to support the motor shaft 2 in the radial direction so that the motor shaft 2 can rotate.

[0019] Preferably, the outer side of the rear end of the motor body 1 also has a sensor and information feedback component 12, which is used to receive the position and speed information of the motor shaft 2 and feed the above information back to the motor driver, so as to further adjust the position and speed of the motor shaft 2 through the motor driver according to needs.

[0020] Preferably, a sensor protection shell 13 is provided on the outer side of the sensor and information feedback component 12 .

[0021] Preferably, the front outer side of the motor body 1 further has an adapter flange 14 which is connected to the housing of the adapter.

[0022] Preferably, the adapting device includes but is not limited to a single-screw rubber or plastic material extruder; a glue injection machine, an injection molding machine; an open mixer, an internal mixer; a crusher; a winding device with tension, etc. In addition, any device that can be connected to a direct-drive torque motor can be connected to the hollow direct-drive torque motor with a detachable structure of the present invention for use;

[0023] When the adapter device is an extruder, the connecting unit of the adapter device is an extrusion screw, which is located inside the adapter device assembly 3 and connected to the inner wall of the adapter device assembly 3, and the motor shaft 2 drives the adapter device assembly 3 and the extrusion screw to rotate, thereby realizing the extrusion action; at the same time, during the extrusion process, the extruded material reacts on the extrusion screw, and the extrusion screw transmits the force to the motor shaft 2 through the adapter device assembly 3 and the connecting bolt 4 in turn. Due to the presence of the stop nut 5, the motor shaft 2 further transmits the force to the motor body 1, and the motor body 1 transmits the force to the mounting base, and the mounting base is fixed, so the mounting base further applies a reverse force, and transmits the force to the extrusion screw through the motor shaft 2, the connecting bolt 4, and the adapter device assembly 3 in turn. This force is the back pressure generated on the motor body 1.

[0024] This application only takes the extrusion device as an example to illustrate the connection method of the motor. In addition, the motor can also be applied to injection molding machines, open mixers, internal mixers, crushers, tension winding equipment, etc. The manufacturing process involved is mainly the stable transmission and winding of film products. The applicable industries are also wide, mainly involving packaging, construction, automobiles, medical and many other industries.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The hollow direct-drive torque motor of the present invention has a detachable structure. Without disassembling the original mechanical structure and heating and cooling equipment, the adapter assembly 3 and the connecting unit of the adapter connected inside can be directly removed from the motor shaft 2 of the motor body 1, or only the connecting unit of the adapter can be removed from the adapter assembly 3 alone. That is to say, the motor independently developed by the present invention can realize the function of front disassembly or rear disassembly alone. Specifically, the hollow direct-drive torque motor of the present invention has a hollow motor shaft 2, and the adapter assembly 3 is detachably connected in the cavity of the motor shaft 2. The two are connected and fixed by connecting bolts 4. In this way, when replacing the adapter, only the connecting bolts 4 need to be removed, and the adapter assembly 3 and the connecting unit of the adapter connected inside can be removed from the motor shaft 2 of the motor body 1 together. The replacement process will not involve other parts of the motor, and there is no need to perform secondary debugging and calibration on the original mechanical structure and heating and cooling equipment. In addition, according to actual needs, the connecting unit of the adapter inside the adapter assembly 3 can also be removed separately during the disassembly process. The disassembly method can also be selected from the front end or rear end of the motor according to the actual situation of the factory. This makes the disassembly, maintenance and replacement of the adapter device more flexible and convenient, which not only saves a lot of product production line operation and maintenance time and cost expenditure, improves production efficiency, but also effectively reduces operation and management costs.

[0027] 2. The hollow direct-drive torque motor with a detachable structure of the present invention can be applied to single-screw rubber or plastic material extruders; glue injection and injection molding machines; open mixers, internal mixers; crushers; winding equipment with tension, etc., and has the advantages of low speed, large torque and a wide range of applications.

[0028] Taking the motor directly used in the extrusion device as an example, the extrusion screw is directly installed inside the adapter assembly 3, eliminating the reduction box. When the extrusion screw needs to be replaced, the motor can realize the disassembly of the extrusion screw from the front and rear ends, which can be well applied to the factory environment, without carrying the extrusion equipment, improving efficiency and reducing safety hazards. However, when using the existing traditional motor, the extrusion screw cannot be removed from the rear end of the motor. The extrusion device head, heating equipment, and cooling equipment at the front end of the extrusion screw must be completely removed, and the extrusion screw must continue to move forward to reserve space for pulling out the extrusion screw. It is not only time-consuming and labor-intensive, but also requires a large amount of factory space. Every time the screw is replaced due to product replacement, it is like overhauling the production line, and a large amount of waste oil, waste liquid, waste gas and other byproducts that pollute the environment are also produced. The hollow direct-drive torque motor with a detachable structure independently developed by the present invention can make the extrusion screw directly disassembled from the rear end of the hollow motor shaft 2 of the motor, without disassembling the components at the front end of the extruder, especially when multiple materials share the head for composite extrusion, which can greatly provide work efficiency and equipment safety, personal safety.

[0029] 3. In a preferred embodiment, the hollow direct-drive torque motor with a detachable structure of the present invention also includes a sensor and information feedback component 12, which is used to receive the position and speed information of the motor shaft 2, and feed the above information back to the motor driver, so as to further adjust the position and speed of the motor shaft 2 through the motor driver according to demand, and the motor can be accurately controlled according to demand.

[0030] 4. The water cooling component provides cooling water to the adapter device (extrusion screw N2 in the extruder), reduces the heat generated by the motor shaft 2 during rotation through heat exchange, and improves the dynamic performance and heat load capacity of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of the hollow direct-drive torque motor with a detachable structure of the present invention;

[0032] Figure 2 A hollow direct-drive torque motor with a detachable structure is used in an extrusion device in an embodiment of the present invention, and a schematic diagram of the overall structure of the extrusion device;

[0033] Figure 3 This is a schematic structural diagram of a hollow direct-drive torque motor with a detachable structure used in an extrusion device in an embodiment of the present invention, in which an extrusion screw N2 of the extrusion device is detached from the rear end of the motor body 1;

[0034] Figure 4 It is a partial schematic diagram of the rear end of the motor body 1 when the hollow direct-drive torque motor with a detachable structure in the embodiment of the present invention is used in the extrusion device and the extrusion screw N2 of the extrusion device is disassembled from the rear end of the motor body 1;

[0035] Names of the accompanying drawings: 1-motor body, 2-motor shaft, 3-adapter assembly, 4-connecting bolt, 5-stop nut, 6-motor stator and rotor assembly, 7-water-cooled tie rod, 8-water-cooled joint, 9-water-cooled tie rod locking nut, 10-thrust bearing, 11-deep groove ball bearing, 12-sensor and information feedback assembly, 13-sensor protective shell, 14-adapter adapter flange, N1-extrusion device head, N2-extrusion screw, N3-barrel, N4 feeding component, N5-hollow direct-drive torque motor with detachable structure. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below in conjunction with embodiments.

[0037] Those skilled in the art will appreciate that the following examples are only used to illustrate the present invention and should not be considered to limit the scope of the present invention. If no specific techniques or conditions are specified in the examples, the techniques or conditions described in the literature in the art or the product specifications are used. If the manufacturer of the materials or equipment used is not specified, they are all conventional products that can be purchased.

[0038] Those skilled in the art will appreciate that, unless expressly stated otherwise, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" to another element, it may be directly connected to the other element, or there may be intermediate elements. In addition, the "connection" used herein may include wireless connections.

[0039] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two. The terms "inside", "upper", "lower", etc., indicating positions or state relationships, are based on the positions or state relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operate in a specific position, and therefore cannot be understood as limiting the present invention.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "provided with" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention will be understood according to specific circumstances.

[0041] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as those generally understood by those skilled in the art in the art to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless defined as herein.

[0042] Example 1

[0043] like Figure 1 As shown, this embodiment is a hollow direct-drive torque motor with a detachable structure, which includes: a motor body 1; a motor shaft 2, which is located inside the motor body 1 and is a hollow structure, and a stop nut 5 is provided between the motor shaft 2 and the motor body 1 to prevent the motor shaft 2 from moving axially; an adapter assembly 3, which is located in the hollow structure of the motor shaft 2 and is used to be connected to the connecting unit of the adapter, and the adapter assembly 3 and the motor shaft 2 are connected and fixed by a connecting bolt 4; a motor driver, which drives and controls the rotation speed of the motor shaft 2;

[0044] By removing the connecting bolts 4, the adapter device assembly 3 and the connecting unit of the adapter device connected thereto can be removed from the motor shaft 2 of the motor body 1 together; by dismantling the connection relationship between the adapter device assembly 3 and the connecting unit of the adapter device inside it, the connecting unit of the adapter device can be removed from the adapter device assembly 3 alone.

[0045] Among them, the motor body 1 of the hollow direct-drive torque motor with a detachable structure also has a motor stator and rotor assembly 6 inside, wherein the rotor is connected to the motor shaft 2 and rotates simultaneously with the motor shaft. This design is a common design in the field.

[0046] The adapter assembly 3 also has a water-cooling tie rod 7 inside, which is connected to a water-cooling joint 8 outside the motor body 1 to supply cooling water to the extrusion screw N2 inside the adapter assembly 3 for cooling;

[0047] The water-cooling rod 7 and the adapter assembly 3 are connected and fixed by a water-cooling rod locking nut 9. During the disassembly process, the water-cooling rod 7 can be directly removed from the adapter assembly 3 after the water-cooling joint 8 and the water-cooling rod locking nut 9 are removed.

[0048] The motor body 1 also has a thrust bearing 10 and a deep groove ball bearing 11 inside. The thrust bearing 10 is arranged at the front end of the motor body 1, and the deep groove ball bearing 11 is arranged at the rear end of the motor body 1. Both are located on the outside of the motor shaft 2 to support the motor shaft 2 in the radial direction so that the motor shaft 2 can rotate.

[0049] The outer side of the rear end of the motor body 1 also has a sensor and information feedback component 12, which is used to receive the position and speed information of the motor shaft 2 and feed the above information back to the motor driver, so as to further adjust the position and speed of the motor shaft 2 through the motor driver according to needs.

[0050] The sensor and information feedback assembly 12 has a sensor protection shell 13 on its outer side.

[0051] The front outer side of the motor body 1 is also provided with an adapter flange 14 which is connected to the housing of the adapter.

[0052] When the hollow direct-drive torque motor with a detachable structure is applied to an extrusion device, the extrusion device, in addition to the hollow direct-drive torque motor (N5), also includes: an extrusion device head N1, an extrusion screw N2, a barrel N3, and a feeding component N4; one end of the extrusion screw is connected to the extrusion screw adapter 3 inside the motor body 1, and extends into the extrusion screw adapter 3;

[0053] The barrel is located outside the extrusion screw, and the front end of the barrel is connected to the extrusion device head, and the rear end is connected to the feeding component, and the rear end of the feeding component is connected to the front end housing of the motor body 1 of the hollow direct drive torque motor (see Figure 2 );

[0054] When the motor shaft 2 has a water-cooling tie rod 7 inside, it is only necessary to remove the water-cooling joint 8, the water-cooling tie rod locking nut 9 and the connecting bolt 4, and then remove the water-cooling tie rod 7, the extrusion screw adapter 3 and the extrusion screw from the rear end of the motor shaft 2. The method of replacing the screw is simple and efficient, saving time and labor (see Figure 3 ).

Claims

1. A hollow direct-drive torque motor with a detachable structure, characterized in that: It includes: Motor body (1); A motor shaft (2) is located inside the motor body (1) and is a hollow structure. A stop nut (5) is provided between the motor shaft (2) and the motor body (1) to prevent the motor shaft (2) from moving axially. An adapter assembly (3), which is located in the hollow structure of the motor shaft (2) and is used to be connected to the connecting unit of the adapter, and the adapter assembly (3) and the motor shaft (2) are connected and fixed by connecting bolts (4); A motor driver, driving the motor shaft (2) to rotate and controlling the rotation speed of the motor shaft (2); Remove the connecting bolts (4), and remove the adapter assembly (3) and the connecting unit of the adapter connected thereto from the motor shaft (2) of the motor body (1); The connection relationship between the adapter device assembly (3) and the adapter device connection unit inside it is disassembled, and the adapter device connection unit is removed from the adapter device assembly (3) separately.

2. The hollow direct-drive torque motor with a detachable structure according to claim 1, characterized in that: The adapter assembly (3) also has a water-cooling pull rod (7) inside, which is connected to a water-cooling joint (8) outside the motor body (1) to supply cooling water to the adapter connected inside the adapter assembly (3) for cooling; The water-cooling pull rod (7) and the adapter assembly (3) are connected and fixed via a water-cooling pull rod locking nut (9); During the disassembly process, after removing the water-cooling joint (8) and the water-cooling tie rod locking nut (9), the water-cooling tie rod (7) is directly removed from the adapter assembly (3).

3. The hollow direct-drive torque motor with a detachable structure according to claim 1, characterized in that: The motor body (1) also has a thrust bearing (10) and a deep groove ball bearing (11) inside. The thrust bearing (10) is arranged at the front end inside the motor body (1), and the deep groove ball bearing (11) is arranged at the rear end inside the motor body (1). Both are located outside the motor shaft (2) to support and lift the motor shaft (2) in the radial direction so that the motor shaft (2) rotates.

4. The hollow direct-drive torque motor with a detachable structure according to claim 1, characterized in that: The rear end of the motor body (1) is also provided with a sensor and information feedback component (12) for receiving position and speed information of the motor shaft (2) and feeding the above information back to the motor driver, so as to further adjust the position and speed of the motor shaft (2) through the motor driver according to demand.

5. The hollow direct-drive torque motor with a detachable structure according to claim 4, characterized in that: The sensor and information feedback component (12) has a sensor protection shell (13) on the outside.

6. The hollow direct-drive torque motor with a detachable structure according to claim 1, characterized in that: The front section of the motor body (1) also has an adapter flange (14) on the outside, which is connected to the housing of the adapter.

7. The hollow direct-drive torque motor with a detachable structure according to claim 1, characterized in that: The adapting device is a single-screw rubber or plastic material extruder; a glue injection or injection molding machine; an open mixer or internal mixer; a crusher; or a tension winding device; When the adapter device is an extruder, the connecting unit of the adapter device is an extrusion screw, which is located inside the adapter device assembly (3) and contacts the inner wall of the adapter device assembly (3). The motor shaft (2) drives the adapter device assembly (3) and the extrusion screw to rotate, thereby realizing the extrusion action.

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