Torque protection device of electric screw press

Abstract

The torque protection device of the electric screw press comprises a screw rod, a hub and a large gear, one end of the screw rod is fixed in a center hole in the hub, and a wheel disc of the large gear is installed in a positioning groove in the peripheral face of the hub through a pressing plate assembly. The pressing plate assembly comprises a pressing plate, a pressing bolt, a first fastening nut matched with the pressing bolt and a spring, the lower end face of a wheel disc of the large gear is positioned at the groove bottom of the positioning groove, the upper end face of the wheel disc of the large gear is positioned through the pressing plate, and the threaded section of the pressing bolt sequentially penetrates through the hub, the pressing plate and the spring and then is in threaded connection with the first fastening nut. The first fastening nut abuts against the spring, the spring is compressed between the first fastening nut and the pressing plate, and friction plates are arranged between the upper end face of the gear disc of the large gear and the pressing plate and between the lower end face of the gear disc of the large gear and the positioning groove. Redundant energy on the large gear can be promoted to be converted and released, safety of equipment is guaranteed, and therefore the service life of the equipment is prolonged.

Description

Technical Field

[0001] The utility model relates to an electric screw press, in particular to a torque protection device for an electric screw press. Background Art

[0002] The working process of the electric screw press is to transfer the torque of the switched reluctance motor to the large gear assembly through the small gear, so that its speed increases within a certain period of time, storing the set energy, and at the same time transferring the rotational motion of the large gear to the screw, and then the screw and the slider nut convert the rotational motion into the linear motion of the slider. When the slider moves downward to contact the workpiece, the large gear assembly releases energy by reducing speed, and consumes the energy in the deformation of the workpiece. When the workpiece is deformed, the upper and lower mold limit contacts produce cold shock. At this time, the remaining rotational kinetic energy of the large gear assembly will be converted into cold shock force, causing the equipment load to increase sharply. If the set energy is too high, the excess energy will be converted into cold shock force, causing serious damage to the equipment, and even destructive damage, thereby causing serious economic losses and safety hazards. Utility Model Content

[0003] According to the technical problem raised above, a torque protection device for an electric screw press is provided. The utility model provides an electric screw press torque protection device with a simple structure, which can promote the conversion and release of excess energy on the large gear, ensure the safety of the equipment, thereby prolonging the life of the equipment and saving costs.

[0004] The technical means adopted by the utility model are as follows:

[0005] The gear wheel assembly is a kind of gear wheel assembly, and the ...

[0006] Furthermore, a copper sleeve is provided between the inner circumferential surface of the wheel disc of the large gear and the bottom of the positioning groove.

[0007] Furthermore, mounting grooves for positioning the friction plate are correspondingly formed on the pressure plate and the positioning groove.

[0008] Furthermore, two retaining rings are arranged between the spring and the clamping bolt, and the two retaining rings are sleeved on the clamping bolt at intervals along the axial direction of the clamping bolt, and each retaining ring is correspondingly provided with an open groove adapted to the spring.

[0009] Furthermore, it also includes a small gear meshing with the large gear.

[0010] Furthermore, it also includes a slider nut connected to the screw rod.

[0011] Furthermore, the screw is fastened to the wheel hub through a second fastening nut, and an anti-loosening bolt is arranged between the second fastening nut and the end face of the wheel hub, and a threaded section of the anti-loosening bolt passes through the second fastening nut and is threadedly screwed into a threaded hole on the end face of the wheel hub.

[0012] Furthermore, a second locking nut is provided on the screw rod at a side of the second fastening nut away from the wheel hub.

[0013] Furthermore, the clamping bolt is also provided with a first locking nut for preventing the first fastening nut from loosening.

[0014] Furthermore, the spring is a butterfly spring.

[0015] The utility model has the following advantages:

[0016] The utility model provides an electric screw press torque protection device, comprising: a screw, a wheel hub and a large gear, the wheel hub is provided with a center hole adapted to the screw, one end of the screw is fixed in the center hole on the wheel hub, the outer peripheral surface of the wheel hub is provided with a positioning groove adapted to the large gear, the wheel disc of the large gear is installed in the positioning groove of the outer peripheral surface of the wheel hub through a pressure plate assembly, the pressure plate assembly comprises a pressure plate, a clamping bolt, a first fastening nut adapted to the clamping bolt and a spring, the lower end surface of the wheel disc of the large gear is positioned at the groove bottom of the positioning groove, the upper end surface of the wheel disc of the large gear is positioned by the pressure plate, the threaded section of the clamping bolt passes through the wheel hub, the pressure plate and the spring in sequence and is threadedly connected with the first fastening nut, the first fastening nut is pressed against the spring, the spring is compressed between the first fastening nut and the pressure plate, and friction plates are arranged between the upper end surface of the wheel disc of the large gear and the pressure plate, and between the lower end surface of the wheel disc of the large gear and the positioning groove. It can convert and release the excess energy on the large gear, ensure the safety of the equipment, and thus increase the life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a half-section view of an embodiment of the utility model.

[0019] In the figure: 1, screw rod, 2, wheel hub, 3, large gear, 4, pressure plate, 5, clamping bolt, 6, first fastening nut, 7, spring, 8, friction plate, 9, retaining ring, 10, copper sleeve, 11, second fastening nut, 12, anti-loosening bolt, 13, second locking nut, 14, positioning groove, 15, first locking nut. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Example 1

[0022] like Figure 1 As shown, a torque protection device for an electric screw press comprises: a screw 1, a wheel hub 2 and a large gear 3, wherein the wheel hub 2 is provided with a center hole adapted to the screw 1, one end of the screw 1 is fixed in the center hole of the wheel hub 2, a positioning groove 14 adapted to the large gear 3 is provided on the outer peripheral surface of the wheel hub 2, and the wheel disc of the large gear 3 is installed in the positioning groove 14 on the outer peripheral surface of the wheel hub 2 through a pressure plate assembly, and the pressure plate assembly comprises a pressure plate 4, a clamping bolt 5, a first fastening nut 6 adapted to the clamping bolt 5, and an elastic Spring 7, the lower end face of the wheel disc of the large gear 3 is positioned at the bottom of the positioning groove 14 on the wheel hub, the upper end face of the wheel disc of the large gear 3 is positioned by the pressure plate 4, the threaded section of the clamping bolt 5 passes through the wheel hub 2, the pressure plate 4 and the spring 7 in sequence and is threadedly connected with the first fastening nut 6, the first fastening nut 6 is pressed against the spring 7, and the spring 7 is compressed between the first fastening nut 6 and the pressure plate 4, and friction plates 8 are arranged between the upper end face of the wheel disc of the large gear 3 and the pressure plate 4, and between the lower end face of the wheel disc of the large gear 3 and the positioning groove 14.

[0023] Specifically, in order to facilitate the installation and positioning of the friction plate 8, mounting grooves for positioning the friction plate 8 are correspondingly provided on the pressure plate 4 and the positioning groove 14. The friction plate 8 is embedded in the corresponding mounting groove.

[0024] In order to ensure the effective expansion and contraction of the spring 7, two retaining rings 9 are arranged between the spring 7 and the clamping bolt 5. The two retaining rings 9 are sleeved on the clamping bolt 5 at intervals along the axial direction of the clamping bolt, and each retaining ring 9 is provided with an opening groove adapted to the spring 7. The first fastening nut 6 applies pressure to the spring 7 by abutting against the retaining ring 9, so that the spring 7 is subjected to a stable force. Preferably, the spring 7 of this embodiment is a butterfly spring 7.

[0025] In order to prevent the first fastening nut from loosening and ensure the stability of the spring under pressure, the clamping bolt 5 of this embodiment is further provided with a first locking nut 15 for preventing the first fastening nut 6 from loosening. The first locking nut 15 presses against the first fastening nut 6.

[0026] In order to improve the stability of transmission, a copper sleeve 10 is provided between the inner circumferential surface of the wheel disc of the large gear 3 and the bottom of the positioning groove 14 in this embodiment.

[0027] The screw rod 1 of this embodiment is fastened to the wheel hub 2 by the second fastening nut 11, and a locking bolt 12 is arranged between the end surface of the second fastening nut 11 and the end surface of the wheel hub 2. The threaded section of the locking bolt 12 passes through the second fastening nut and is screwed into the threaded hole on the end surface of the wheel hub 2. In order to ensure the stable connection between the screw rod 1 and the wheel hub 2, a second locking nut 13 is arranged on the screw rod 1 on the side of the second fastening nut 11 away from the wheel hub 2.

[0028] This embodiment also includes a small gear meshing with the large gear 3 and a slider nut connected to the screw rod 1 .

[0029] When the equipment is overloaded, the residual rotational energy on the large gear 3 and the copper sleeve 10 overcomes the pressure on the spring assembly composed of the first locking nut 15, the first fastening nut 6, the retaining ring 9, the disc spring, and the clamping bolt 5, and generates relative motion between the pressure plate 4, the friction plate 8, and the wheel hub 2. The residual rotational energy is completely converted into friction work, and the friction work is then dissipated into the surrounding environment by the flowing air in the form of heat conduction. Thus, the purpose of protecting the equipment and eliminating safety hazards of the equipment is achieved.

[0030] It should be noted that the parts not described in detail in the present invention are prior art.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "install", "set", "connect", "connect", "fix", "screw" and the like 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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0036] In the description of the present utility model, the term "comprises", "includes" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A torque protection device for an electric screw press, characterized in that: include: The gear wheel of the present invention is a gear wheel that is fixed to the center hole of the gear wheel, and the gear wheel has a first end and a second end thereof, and the gear wheel has a first end and a second end thereof, and the gear wheel has a first end and a second end thereof, and the gear wheel has a first end and a second end thereof, and the gear wheel has a first end and a second end thereof, and the gear wheel has a first end and a second end thereof, and the gear wheel has a first end and a second end thereof, and the gear wheel has a first end and a second end thereof, and the gear wheel has a first end and a second end thereof, and the gear wheel has a first end and a second end thereof, 2. The torque protection device for an electric screw press according to claim 1, characterized in that: A copper sleeve is arranged between the inner circumferential surface of the wheel disc of the large gear and the bottom of the positioning groove.

3. The torque protection device for an electric screw press according to claim 1, characterized in that: The pressure plate and the positioning groove are both correspondingly provided with mounting grooves for positioning the friction plate.

4. The torque protection device for an electric screw press according to claim 1, characterized in that: Two retaining rings are arranged between the spring and the clamping bolt. The two retaining rings are sleeved on the clamping bolt at intervals along the axial direction of the clamping bolt. Each retaining ring is correspondingly provided with an open groove adapted to the spring.

5. The torque protection device for an electric screw press according to claim 1, characterized in that: Also included is a pinion gear meshing with the large gear.

6. The torque protection device for an electric screw press according to claim 1, characterized in that: Also included is a slider nut connected to the screw rod.

7. The torque protection device for an electric screw press according to claim 1, characterized in that: The screw is fastened to the wheel hub through a second fastening nut, and an anti-loosening bolt is arranged between the second fastening nut and the end face of the wheel hub. The threaded section of the anti-loosening bolt passes through the second fastening nut and is screwed into the threaded hole on the end face of the wheel hub.

8. The torque protection device for an electric screw press according to claim 7, characterized in that: A second locking nut is arranged on the screw rod at a side of the second fastening nut away from the wheel hub.

9. The torque protection device for an electric screw press according to claim 7, characterized in that: The clamping bolt is also provided with a first locking nut for preventing the first fastening nut from loosening.

10. An electric screw press torque protection device according to any one of claims 1 to 9, characterized in that: The spring is a butterfly spring.

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