Electric cantilever type safety door for squeeze casting machine

Abstract

An electric cantilever type safety door for an extrusion casting machine comprises a safety door body, a guide rail, a door frame mechanism, a gear and rack transmission mechanism and a stroke protection mechanism. A round steel guide rail is welded on the safety door, and double pulleys are fixed on the door frame; the rack is fixed on the safety door, and the motor is fixed on the door frame; the motor drives the rack to relatively horizontally move, so that the rack drives the safety door to horizontally open and close; the stop of the safety door is controlled through the limit switch, and a mechanical limit stop block is arranged; the double-pulley bearing capacity is high, self-balancing is achieved, the non-parallelism of the guide rail on the safety door can be compensated, and operation is stable and reliable. The device is simple and compact in structure, can adapt to the severe environment of the extrusion casting machine, is stable and safe, fully protects the safety of an operator, provides an open channel for the installation and replacement of a mold, and is higher in production efficiency.

Description

Technical Field

[0001] The utility model relates to an auxiliary device for an extrusion casting machine, in particular to an electric cantilever safety door for an extrusion casting machine. Background Art

[0002] At present, most of the extrusion casting machines use a hanging rail safety door with a crossbeam track. Although this kind of safety door has stable operation and strong adaptability, its installation and maintenance are relatively complex; moreover, the crossbeam track on the safety door occupies a certain space. When it is necessary to install and replace large molds, the entire safety door with a crossbeam needs to be disassembled to install and replace the molds. Therefore, it is necessary to design an electric cantilever safety door without a crossbeam.

[0003] Chinese Patent CN 206733546U discloses a cantilever safety door, which is characterized in that: the upper guide rail is installed and fixed on the protective door bracket and one side of the die-locking component, the lower guide rail is installed and fixed on both sides of the die-locking component, the length of the upper guide rail is 1 / 2 of the length of the lower guide rail, and the upper guide rail is arranged on the other side close to the opening of the door body; the upper guide rail adopts an upper roller pad tube; a roller is fixedly installed above the rear side of the door body through a roller bracket and is hung on the upper roller pad tube through the roller; the rollers are arranged in parallel in 2; the rollers are wrapped with a plastic layer; a linear slide rail is fixed below the rear side of the door body, and the linear slide rail is installed on the lower guide rail. Compared with the hanging rail safety door with a crossbeam track, although this kind of cantilever safety door has some structural improvements, the opening degree of the safety door is difficult to accurately control, which brings certain troubles to safe production. Summary of the Invention

[0004] The object of the present utility model is to provide an electric cantilever safety door with a simple and stable structure, good self-balancing performance, low installation accuracy, strong maneuverability, easy automation control and low power consumption. The following technical solutions are adopted: It includes a safety door, upper guide rails, lower guide rails, a gantry mechanism, a gear-rack transmission mechanism and a stroke protection mechanism; the upper guide rails and the lower guide rails are respectively fixed at the upper end and the lower end of the safety door, and the lengths of the upper guide rails and the lower guide rails are the same as the length of the gantry; the gantry mechanism is composed of a gantry, an outer gantry cover plate, double pulleys and pulley fixing brackets; the outer gantry cover plate is installed on the outside of the gantry and fixedly connected with the gantry frame; the pulley fixing brackets are respectively installed on two square hollow rods at the upper end and the lower end of the gantry, and the double pulleys are installed on the pulley fixing brackets; the gear-rack transmission mechanism is composed of a motor and a rack, and a gear is provided on the output shaft of the motor; the stroke protection mechanism is composed of a limit switch, a limit switch detection block, a limit stop block and a limit baffle; the four double pulleys are fixedly arranged on the gantry in a rectangular shape distribution. A round steel guide rail is fixedly connected to the upper surface of the upper guide rail and the lower surface of the lower guide rail respectively; the diameter of the round steel guide rail is smaller than the middle width of the double pulley, and the groove part of the double pulley can stably slide on the round steel guide rail; there is a transparent observation window on the safety door; the round steel guide rail is fixed in the middle of the double pulley, so that the safety door can be stably installed on the gantry under the supporting force of the four double pulleys; the rack is fixed on the side of the lower guide rail of the safety door, and the tooth shape faces downward, and the motor is fixed on the side of the square hollow rod at the lower end of the gantry, and the relative horizontal movement of the rack is driven by the motor to drive the horizontal movement of the safety door; the limit switch is fixed on the side of the square hollow rod at the lower end of the gantry, and the limit switch detection block is fixed on the side of the lower guide rail of the safety door; the limit stop block is fixed on the side of the square hollow rod at the upper end of the gantry, located at the end position of the closing path of the safety door; the limit baffle is fixed on the right end face of the safety door and corresponds to the limit switch.

[0005] The beneficial effects of the present utility model are as follows:

[0006] 1) The crossbeam track structure on the traditional safety door is removed, occupying less space, facilitating the installation of large molds, improving the performance utilization rate of the squeeze casting machine and saving costs;

[0007] 2) The four double pulleys have high load-bearing capacity and good self-balancing performance, can compensate for the non-parallelism of the two guide rails on the safety door, and operate stably and reliably;

[0008] 3) It has a mechanical limit stop block, good maneuverability and high automation degree, can detect whether the safety door is opened or closed to the correct position, and can effectively ensure the safety of the staff during the operation process. Description of the Drawings

[0009] Figure 1 It is a schematic structural diagram of the device of the present utility model;

[0010] Figure 2 is Figure 1 a partial enlarged schematic view of area A in

[0011] Figure 3 is Figure 1 a partial enlarged schematic view of area B in

[0012] Figure 4 is Figure 1 a partial enlarged schematic view of area C in

[0013] Figure 5 the front view of the present utility model;

[0014] Figure 6 the rear view of the present utility model;

[0015] Figure 7 the side view of the present utility model;

[0016] Figure 8 the top view of the present utility model.

[0017] Explanation of reference numerals:

[0018] 1. safety door; 2. gantry; 3. double pulley; 4. rack; 5. motor; 6. limit switch; 7. limit switch detection block; 8. limit stop; 9. limit baffle; 10. outer gantry seal plate; 11. square hollow rod; 13. observation window; 14. pulley fixing bracket; 16. guide rail; 17. round steel guide rail. Specific embodiments

[0019] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0020] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of the present utility model are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances so as to implement the embodiments of the present utility model described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily limit to those clearly listed steps or units, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0021] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should also be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0022] A preferred embodiment is listed below and the present utility model will be more clearly described in conjunction with the drawings.

[0023] As Figure 1-8 An electric cantilever safety door for an extrusion casting machine, which is composed of a safety door 1, a guide rail 16, a gantry mechanism, a gear-rack transmission mechanism, and a stroke protection mechanism;

[0024] The gantry mechanism is composed of a gantry 2, an outer gantry seal plate 10, a double pulley 3, and a pulley fixing bracket 14; the outer gantry seal plate 10 is installed on the outside of the gantry 2 and fixedly connected to the gantry frame;

[0025] The gear-rack transmission mechanism is composed of a motor 5 and a rack 4; a gear is provided on the output shaft of the motor 5;

[0026] The stroke protection mechanism is composed of a limit switch 6, a limit switch detection block 7, a limit stop 8, and a limit baffle 9;

[0027] The guide rail 16 includes an upper guide rail and a lower guide rail. The upper guide rail and the lower guide rail are respectively fixed at the upper end and the lower end of the safety door 1. The upper guide rail and the lower guide rail are parallel to the safety door 1 and have the same length; the guide rail 16 is a hollow rectangular steel structure; compared with the steel plate structure, it has higher specific strength, is easier to install, and has better stability;

[0028] The pulley fixing brackets 14 are respectively installed on two square hollow rods 11 at the upper end and the lower end of the gantry 2, and the double pulley 3 is installed on the pulley fixing bracket 14;

[0029] There are a total of four double pulleys 3, which are symmetrically fixed on the gantry 2 through pulley fixing brackets 14 respectively; the four double pulleys have higher load-bearing capacity and good self-balancing performance, which can avoid the jamming of opening and closing caused by the unevenness of the upper guide rail 16 on the safety door 1;

[0030] The round steel guide rail 17 includes an upper round steel guide rail and a lower round steel guide rail;

[0031] The upper round steel guide rail and the lower round steel guide rail are respectively welded on the upper guide rail and the lower guide rail of the guide rail 16, and the four double pulleys 3 fixed at the upper end and the lower end of the gantry 2 are in contact with the upper round steel guide rail and the lower round steel guide rail;

[0032] The diameter of the round steel guide rail 17 is slightly smaller than the width of the middle part of the double pulley 3, and the double pulley 3 can slide stably on the round steel guide rail 17;

[0033] There is a transparent observation window 13 on the safety door 1, which is convenient for the staff to observe the working conditions;

[0034] The round steel guide rail 17 is fixed in the middle part of the double pulley 3, so that the safety door 1 can be stably installed on the gantry 2 under the supporting force of the four double pulleys 3;

[0035] The rack 4 is fixed on the side of the lower guide rail of the safety door 1, and the tooth shape faces downward. The motor 5 is fixed on the side of the square hollow rod 11 at the lower end of the gantry. The motor 5 drives the rack 4 to move horizontally relative to drive the horizontal movement of the safety door 1;

[0036] The limit switch 6 is fixed on the side of the square hollow rod 11 at the lower end of the gantry 2, and the limit switch detection block 7 is fixed on the side of the lower guide rail 16 of the safety door;

[0037] The limit stop 8 is fixed on the side of the square hollow rod 11 at the upper end of the gantry 2, located at the end position of the closing path of the safety door 1; the limit baffle 9 is fixed on the right end face of the safety door 1, corresponding to the limit switch 6.

[0038] The specific working principle of the device of the present utility model is as follows:

[0039] When the safety door 1 needs to be opened or closed, the motor 5 will drive the rack 4 to move horizontally relative to it, so that the rack 4 drives the safety door 1 to switch horizontally. During the movement, the limit baffle 9 on the safety door 1 will first contact the limit block 8 to ensure that the safety door 1 can accurately stay in the predetermined position; at the same time, the limit switch detection block 7 under the safety door 1 contacts the limit switch 6, and the contacts on the limit switch 6 are triggered to generate an electrical signal and transmit it to the control system. The control system will determine whether the safety door 1 is opened or closed to the correct position based on the received signal; if the safety door 1 has been opened or closed in place, the control system will release the operating restrictions on the die-casting machine and allow the operator to proceed to the next step; if the safety door 1 has not been opened or closed in place or there are other safety hazards, the control system will take corresponding measures (such as issuing an alarm, stopping the operation of the die-casting machine, etc.) to ensure the safety of the operator.

[0040] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

[0041] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0042] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. can be used here to describe the spatial positional relationship of a device or feature shown in the figure with other devices or features. It should be understood that the spatial relative terms are intended to cover different orientations in use or operation in addition to the orientation depicted in the figure. For example, if the device in the attached drawing is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations are made for the spatial relative descriptions used here.

[0043] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" etc. is usually based on the orientation or positional relationship shown in the attached drawings, and is only for the convenience of describing the present utility model and simplifying the description. Without contrary description, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the protection scope of the present utility model; the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0044] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An electric cantilever safety door for a squeeze casting machine, characterized in that: It comprises a safety door (1), a guide rail (16), a door frame mechanism and a gear rack transmission mechanism; The safety door (1) is provided with a transparent observation window (13); The guide rail (16) comprises an upper guide rail and a lower guide rail, which are respectively fixed to the upper end and the lower end of the safety door (1), and the lengths of the two guide rails are the same as the length of the door frame; the upper guide rail and the lower guide rail are both hollow rectangular steel structures; The upper surface of the upper guide rail and the lower surface of the lower guide rail are respectively fixedly connected with round steel guide rails (17); the two round steel guide rails (17) are in contact with the grooves of the double pulleys (3); The gantry mechanism is composed of a gantry (2), a gantry outer cover plate (10), double pulleys (3), a pulley fixing bracket (14) and a square hollow rod (11); the gantry outer cover plate (10) is fixedly mounted on the outside of the gantry (2); The rack and pinion transmission mechanism is composed of a motor (5) and a rack (4); the motor (5) is fixed to the side of a square hollow rod (11) at the lower end of the door frame, and the rack (4) is fixed to the side of the lower guide rail with the toothed direction facing downward; the output shaft of the motor (5) is provided with a gear; the pulley fixing bracket (14) is mounted on the square hollow rod (11) of the door frame (2), and the double pulley (3) is fixedly mounted on the pulley fixing bracket (14).

2. The electric cantilever safety door for an extrusion casting machine according to claim 1, characterized in that: Also included is a trip protection mechanism; The travel protection mechanism is composed of a limit switch (6), a limit switch detection block (7), a limit stopper (8) and a limit stopper (9); The limit switch detection block (7) is fixed on the side of the lower guide rail; The limit stopper (8) is fixed to the side of the square hollow rod (11) at the upper end of the door frame and is located at the end position of the closing path of the safety door (1); The limit baffle (9) is fixedly mounted on the right side of the safety door (1).

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