Heavy-load driving balance protection device

Abstract

The utility model discloses a heavy-load driving balance protection device, and belongs to the technical field of high-load driving devices. Comprising a speed reducer, motors and limiting induction switches, the motors and the limiting induction switches are arranged on the two sides of the speed reducer respectively, ports of the motors are connected with ports of the speed reducer through transmission pairs, the speed reducer and the motors arranged on the two sides of the speed reducer are all fixed to the top of a rotating frame, and the bottom of the rotating frame is installed on an arc-shaped rail in a sliding mode through supporting rollers. The circle center of the sliding track of the supporting roller intersects with the axis of the speed reducer. The rotating frame is fixedly installed at the upper end of the fixed base, a spring limiting mechanism used for keeping the device balanced is further arranged at the top of the fixed base, and the top of the spring limiting mechanism is fixedly connected with one end of the bottom of the rotating frame. The utility model provides a heavy-load driving balance protection device which solves the problems that a traditional heavy-load driving balance protection device is high in design cost and large in occupied area and cannot be powered off in time for overload protection.

Description

Technical Field

[0001] The utility model relates to the technical field of high-load driving devices, and more specifically, to a heavy-load driving balance protection device. Background Art

[0002] In the automated production of painting workshops, a conveying system that operates continuously under high loads is one of the more common equipment forms. During the working process, overloading may occur due to problems such as unbalanced operation of the equipment, unconventional production operations, and jamming external forces, which can damage the driving mechanism of the conveying system. Therefore, an overload limit protection device needs to be added. When an overload fault occurs, the protection device can act promptly and reliably to achieve the purpose of protecting the conveyor; when working normally, the protection device will not act even if a pre-tightening force is set.

[0003] Currently, most of the commonly used protection mechanisms for the above problems adopt forms such as torque-limiting couplings, driving main sprockets plus overload limit pins, and driving seats with a central rotating shaft plus support springs. There are still some problems:

[0004] 1) Two sets of motor speed reducers (in a one-use-one-backup mode) are required. Although it can meet the usage requirements, the structural design is complex, the cost is high, and the occupied space is large;

[0005] 2) When the driving mechanism is overloaded, the response time is limited by the mechanical structure, and it is difficult to cut off the circuit in time for overload protection.

[0006] In view of the above problems, we propose a heavy-load driving balance protection device that only requires one set of speed reducers to meet daily needs, and can quickly cut off the circuit when the driving equipment is overloaded to protect the device. Summary of the Utility Model

[0007] The utility model provides a heavy-load driving balance protection device to overcome the problems raised in the above background art.

[0008] To solve the above technical problems, the technical solution of the utility model is as follows:

[0009] A heavy-load driving balance protection device includes a speed reducer, motors and limit induction switches respectively arranged on both sides of the speed reducer. The ports of the motors are connected to the ports of the speed reducer through transmission pairs. The speed reducer and the motors arranged on both sides thereof are fixed on the top of a rotating frame. A roller shaft extending towards the axis of the speed reducer is connected to the bottom of the rotating frame, and support rollers are installed on the roller shaft. The bottom of the rotating frame is slidably installed on an arc track through the support rollers, and the center of the sliding track of the support rollers intersects with the axis of the speed reducer. The rotating frame is fixedly installed on the upper end of a fixed base, and a spring limiting mechanism for maintaining the balance of the device is further arranged on the top of the fixed base. The top of the spring limiting mechanism is fixedly connected to one end of the bottom of the rotating frame.

[0010] The limit induction switch is electrically connected to a controller and is used for cutting off the circuit when detecting the overload state of the device.

[0011] Preferably, the speed reducer and the motors are both electrically connected to the controller, and the controller is a PLC.

[0012] Preferably, the transmission pair connecting the port of the motor and the port of the speed reducer is one of a pulley transmission pair, a chain transmission pair or a gear transmission pair.

[0013] Preferably, at least two support rollers are provided. When the number of support rollers is an even number greater than or equal to, they are symmetrically arranged about the axis of the speed reducer; or,

[0014] When the number of support rollers is an odd number greater than 2, with the vertical midline of the middlemost support roller as the axis of symmetry, the support rollers on both sides thereof are symmetrically arranged.

[0015] Preferably, a strip-shaped opening is formed on the fixed base, and the strip-shaped opening is directly below one end of the rotating frame. A spring limiting mechanism installation groove is arranged below the strip-shaped opening on the fixed base. The spring limiting mechanism includes a screw rod, a spring sleeved on the screw rod, and a bottom limiting member fixedly arranged at the lower part of the screw rod. The top of the screw rod penetrates through one end of the rotating frame, and the top of the screw rod is fixed on the rotating frame through a top limiting member. The screw rod penetrates into the spring limiting mechanism installation groove through the strip-shaped opening. The spring is located inside the spring limiting mechanism installation groove.

[0016] Preferably, the spring limiting mechanism further includes a middle limiting member. The middle limiting member is movably sleeved on the middle section of the spring limiting mechanism. The middle limiting member is located at the upper end of the strip-shaped opening, and a positioning nut is further arranged on the screw rod at the top of the middle limiting member.

[0017] Preferably, both the bottom limiting member and the top limiting member are detachable nuts.

[0018] Preferably, the limit induction switch includes a mounting base, a light-sensing limit switch transmitting end, a bracket, and a light-sensing limit switch receiving end. The light-sensing limit switch receiving end is fixed on the screw rod. A bracket is provided at one end of the fixed base corresponding to the spring limit mechanism at the top. The bracket is sleeved with a mounting base. The mounting base is fixed on the bracket by a nut. And a light-sensing limit switch transmitting end is provided on the side of the mounting base facing the light-sensing limit switch receiving end. Both the light-sensing limit switch receiving end and the light-sensing limit switch transmitting end are connected to the PLC.

[0019] Preferably, two groups of spring limit mechanisms are provided in the front-back direction at one end of the rotating frame. The light-sensing limit switch receiving end is arranged on the screw rod of one group of spring limit mechanisms.

[0020] Compared with the prior art, the beneficial effects of the technical solution of the present utility model are as follows:

[0021] The present utility model provides a heavy-load driving balance protection device, which solves the problems of large floor space, high cost and inability to cut off power in time for protection of the existing heavy-load driving balance protection device. Specifically:

[0022] 1) By designing the support rollers and the arc track, the reducer and the motors arranged on both sides of the reducer can move in a circular motion along the arc track as a whole. Since the center of the arc track corresponds to the axis of the middle reducer, when the device is overloaded, it will swing along the axis of the reducer. Generally, the spring limit mechanism arranged at one end of the above mechanism can achieve the balance of the device. When overloaded, due to the increased swing amplitude, when reaching the critical value, the screw rod on the spring limit mechanism is lifted, so that the light-sensing limit switch receiving end reaches the preset height. When the light path is realized between the light-sensing limit switch receiving end and the light-sensing limit switch transmitting end, the power is cut off through the PLC to achieve overload protection. In this solution, only one reducer is needed, which can reduce costs and floor space. At the same time, the limit induction switch is used to quickly cut off the circuit to achieve overload protection and reduce the corresponding time;

[0023] 2) The design of the mounting base and the bracket can adjust the height of the light-sensing limit switch transmitting end to achieve the effect of the preset height. The designer can adjust the preset height for cutting off the circuit according to the required degree of device overload;

[0024] 3) The design of the middle limiting member can adjust the buffer hardness of the spring in the spring limit mechanism, and the time required for the spring limit mechanism to restore balance can be adjusted according to actual needs. For example, by lowering the nut, the spring inside the installation groove of the spring limit mechanism is squeezed, the stroke becomes shorter, and the buffer recovery time becomes shorter; on the contrary, the buffer recovery time becomes longer. Description of the Drawings

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 Front view structural schematic diagram of the present invention;

[0027] Figure 2 Side view structural schematic diagram of the present invention;

[0028] Figure 3 For the present invention Figure 1 Structural schematic diagram when the device is overloaded;

[0029] Figure 4 For the present invention Figure 2 Partial enlarged structural schematic diagram of the position of the spring limiting mechanism in the present invention;

[0030] Figure 5 For the present invention Figure 1 Partial enlarged structural schematic diagram of the position of the spring limiting mechanism in the present invention.

[0031] Marking description in the figure: 1. Fixed base; 2. Rotating frame; 3. Arc track; 4. Support roller; 5. Spring limiting mechanism; 51. Screw; 52. Bottom limiting part; 53. Spring; 54. Middle limiting part; 55. Top limiting part; 6. Limit induction switch; 61. Mounting seat; 62. Light sensing limit switch transmitting end; 63. Bracket; 7. Roller shaft; 8. Reducer; 9. Motor; 10. Strip-shaped opening; 11. Spring limiting mechanism installation groove; 12. Light sensing limit switch receiving end. Specific embodiments

[0032] To better understand the purpose, structure and function of the present invention, the following will further describe the technical solutions of the present invention in detail with reference to the drawings and specific preferred embodiments.

[0033] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "left side", "right side", "upper part", "lower part", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second", etc. do not represent the importance of the components, so it cannot be understood as a limitation to the present utility model. The specific dimensions adopted in the embodiments are only for illustrating the technical solutions by way of example and do not limit the protection scope of the present utility model. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0034] Unless otherwise clearly defined and limited, terms such as "installation", "setting", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] Embodiment 1:

[0036] Please refer to Figures 1-5 , a heavy-load driving balance protection device, including a speed reducer 8, motors 9 on both sides of the speed reducer 8, and a limit induction switch 6. The ports of the motors 9 are connected to the ports of the speed reducer 8 through a transmission pair, and the transmission pair is one of a pulley transmission pair, a chain transmission pair, or a gear transmission pair. The speed reducer 8, the motors 9, and the limit induction switch 6 are all electrically connected to the PLC. When the device is overloaded, the limit induction switch 6 senses a preset position change. After the PLC receives the signal, an open circuit is achieved to avoid overload.

[0037] As Figure 1 , Figure 2 and Figure 4 shown, the speed reducer 8 and the two motors 9 are both fixed on the top of the rotating frame 2. The speed reducer 8, the two motors 9, and the rotating frame 2 below form an integral body. The bottom of the rotating frame 2 is connected with a roller shaft 7 arranged towards the axis of the speed reducer 8, and a support roller 4 is installed on the roller shaft 7; the bottom of the rotating frame 2 is slidably installed on the arc track 3 through the support roller 4, and the center of the sliding track of the support roller 4 intersects with the axis of the speed reducer 8. When a load appears, the integral body formed by the speed reducer 8, the two motors 9, and the rotating frame 2 below makes a circular swing on the arc track 3 through the support roller 4 and the roller shaft 7, and the device achieves balance through the spring limiting mechanism 5.

[0038] Specifically, as Figure 2 andFigure 4 As shown, the rotating frame 2 is fixedly installed at the upper end of the fixed base 1. A spring limiting mechanism 5 for maintaining the balance of the device is also provided at the top of the fixed base 1. The top of the spring limiting mechanism 5 is fixedly connected to one end of the bottom of the rotating frame 2. The upper end of the spring limiting mechanism 5 is fixed below one end of the rotating frame 2. The spring limiting mechanism 5 is limited to the upper end of the fixed base 1. When the rotating frame 2 swings, the elastic member in the spring limiting mechanism 5 helps the device maintain balance when a load occurs through stretching and squeezing.

[0039] In some embodiments, at least two support rollers 4 are provided. When the number of support rollers 4 is an even number greater than or equal to 2, they are symmetrically arranged about the axis of the speed reducer 8; or,

[0040] When the number of support rollers 4 is an odd number greater than 2, with the vertical center line of the middlemost support roller 4 as the axis of symmetry, the support rollers 4 on both sides are symmetrically arranged.

[0041] The number of support rollers 4 is determined according to the size of the device. For example, Figure 1 as shown, the number of support rollers 4 is 2, and the two support rollers 4 are symmetrically arranged about the axis of the speed reducer 8. This setting can ensure that the overall structure composed of the speed reducer 8, the two motors 9, and the rotating frame 2 below is more stable after installation. If the installation position adopts an asymmetric method, it is very difficult for the rotating frame 2 to remain horizontal, affecting the overall operation of the device.

[0042] In some embodiments, as Figure 3 shown, a strip-shaped opening 10 is formed in the fixed base 1, and the strip-shaped opening 10 is directly below one end of the rotating frame 2; a spring limiting mechanism installation groove 11 is provided below the strip-shaped opening 10 in the fixed base 1; the spring limiting mechanism 5 includes a screw 51, a spring 53 sleeved on the screw 51, and a bottom limiting member 52 fixedly arranged at the lower part of the screw 51; the top of the screw 51 penetrates through one end of the rotating frame 2, and the top of the screw 51 is fixed to the rotating frame 2 through a top limiting member 55. The screw 51 penetrates into the spring limiting mechanism installation groove 11 through the strip-shaped opening 10; the spring 53 is located inside the spring limiting mechanism installation groove 11; both the bottom limiting member 52 and the top limiting member 55 are detachable nuts.

[0043] This structure introduces a spring limiting mechanism 5 and its installation method. The spring limiting mechanism 5 includes a screw 51 and a spring 53 sleeved on the bottom of the screw 51. The upper end of the spring 53 is fixed to the rotating frame 2 through a top limiting member 55, ensuring that when the rotating frame 2 swings, the screw 51 can be pulled up. The spring 53 is located inside the spring limiting mechanism installation groove 11. When the screw 51 is pulled up, the spring 53 is squeezed by the bottom limiting member 52 inside the spring limiting mechanism installation groove 11. When it elastically returns, it resets the rotating frame 2 to ensure the balance of the device under load.

[0044] More specifically, the spring limiting mechanism 5 further includes a middle limiting member 54. The middle limiting member 54 is movably sleeved on the middle section of the spring limiting mechanism 5. The middle limiting member 54 is located at the upper end of the strip-shaped opening 10, and a positioning nut is further provided on the top screw 51 of the middle limiting member 54. In this embodiment, the purpose of the middle limiting member 54 is to change the deformation form of the spring 53. For example, when the middle limiting member 54 is lowered by using the nut, in the initial state, the spring 53 is squeezed. At this time, when the device is loaded, the recovery time is shortened. On the contrary, when the middle limiting member 54 is raised, the initial state stroke of the spring 53 becomes longer, and the recovery time of the device becomes longer, but better buffering is obtained. The specific adjustment is made according to actual needs.

[0045] In some embodiments, as Figure 5 shown, the limit induction switch 6 includes a mounting base 61, a light-sensing limit switch transmitting end 62, a bracket 63, and a light-sensing limit switch receiving end 12. The light-sensing limit switch receiving end 12 is fixed on the screw 51. A bracket 63 is provided at one end of the fixed base 1 corresponding to the spring limiting mechanism 5. The bracket 63 is sleeved with a mounting base 61. The mounting base 61 is fixed on the bracket 63 by a nut, and a light-sensing limit switch transmitting end 62 is provided on the side of the mounting base 61 facing the light-sensing limit switch receiving end 12. Both the light-sensing limit switch receiving end 12 and the light-sensing limit switch transmitting end 62 are connected to the PLC. When the device is overloaded, the screw 51 is stretched upward, so that the light-sensing limit switch receiving end 12 is lifted to a certain height until it is flush with the light-sensing limit switch transmitting end 62 and a light path is realized. At this time, the PLC is powered off to achieve overload protection of the device. The light-sensing limit switch can quickly disconnect the circuit when the device is overloaded to protect the device.

[0046] It should be noted that the light-sensing limit switch transmitting end 62 and the light-sensing limit switch receiving end 12 in this application, as well as how the two are connected to the PLC to achieve a path, are all prior arts, and this application will not elaborate.

[0047] As Figure 1 shown, two groups of spring limiting mechanisms 5 are provided in the front-back direction at one end of the rotating frame 2, and the light-sensing limit switch receiving end 12 is provided on the screw 51 of one group of spring limiting mechanisms 5.

[0048] The following will elaborate on the specific working principle of this application:

[0049] 1) Preset the height of the light-sensing limit switch transmitting end 62, which is achieved by adjusting the height of the mounting base 61 on the bracket 63. This operation can preset the sensing height of the limit induction switch 6;

[0050] 2) Preset the height of the middle limiting member 54 to adjust the hardness of the spring 53 inside the installation groove 11 of the spring limiting mechanism and change its buffering stroke;

[0051] 3) When the speed reducer 8, the motors 9 on both sides of the speed reducer 8 and the limit induction switch 6 are working, due to the load, the whole device, including the speed reducer 8, the motors 9 and the rotating frame 2, swings in the arc track 3 through the roller shaft 7 and the supporting rollers 4. The rotating frame 2 will pull up the screw rod 51 until, when overloaded, the receiving end 12 of the light-sensing limit switch receives the light signal from the transmitting end 62 of the light-sensing limit switch, achieving a conducting path, and the PLC disconnects the power supply of the speed reducer 8 and the motors 9 to achieve overload protection.

[0052] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A heavy-load driving balance protection device, comprising a speed reducer (8), motors (9) and limit induction switches (6) arranged on both sides of the speed reducer (8), wherein the ports of the motors (9) are connected to the ports of the speed reducer (8) through transmission pairs, and it is characterized in that: The speed reducer (8) and the motors (9) arranged on both sides thereof are fixed to the top of the rotating frame (2). The bottom of the rotating frame (2) is connected with a roller shaft (7) arranged towards the axis of the speed reducer (8), and a supporting roller (4) is installed on the roller shaft (7); the bottom of the rotating frame (2) is slidably installed on the arc-shaped track (3) through the supporting roller (4), and the center of the sliding track of the supporting roller (4) intersects with the axis of the speed reducer (8); the rotating frame (2) is fixedly installed at the upper end of the fixed base (1), and a spring limiting mechanism (5) for keeping the device balanced is further arranged on the top of the fixed base (1), and the top of the spring limiting mechanism (5) is fixedly connected with one end of the bottom of the rotating frame (2). The limit induction switch (6) is electrically connected to the controller and is used for cutting off the circuit when detecting the overload state of the device.

2. The heavy-load drive balance protection device according to claim 1, wherein The speed reducer (8) and the motor (9) are both electrically connected to the controller, and the controller is a PLC.

3. The heavy-load driving balance protection device according to claim 2, characterized in that The transmission pair connecting the port of the motor (9) and the port of the speed reducer (8) is one of a pulley transmission pair, a chain transmission pair or a gear transmission pair.

4. The heavy-load driving balance protection device according to claim 2, characterized in that, At least two supporting rollers (4) are provided. When the number of the supporting rollers (4) is an even number greater than or equal to 2, they are symmetrically arranged about the axis of the speed reducer (8); or When the number of the supporting rollers (4) is an odd number greater than 2, taking the vertical center line of the middlemost supporting roller (4) as the axis of symmetry, the supporting rollers (4) on both sides thereof are symmetrically arranged.

5. The heavy-load driving balance protection device according to claim 2, wherein A strip-shaped opening (10) is formed in the fixed base (1), and the strip-shaped opening (10) is located directly below one end of the rotating frame (2); a spring limiting mechanism installation groove (11) is arranged below the strip-shaped opening (10) of the fixed base (1); the spring limiting mechanism (5) includes a screw rod (51), a spring (53) sleeved on the screw rod (51), and a bottom limiting member (52) fixedly arranged at the lower part of the screw rod (51); the top of the screw rod (51) penetrates through one end of the rotating frame (2), and the top of the screw rod (51) is fixed to the rotating frame (2) through a top limiting member (55), and the screw rod (51) penetrates into the spring limiting mechanism installation groove (11) through the strip-shaped opening (10); the spring (53) is located inside the spring limiting mechanism installation groove (11).

6. The heavy-load driving balance protection device according to claim 5, wherein, The spring limiting mechanism (5) further includes a middle limiting member (54), the middle limiting member (54) is movably sleeved on the middle section of the spring limiting mechanism (5), the middle limiting member (54) is located at the upper end of the strip-shaped opening (10), and a positioning nut is further arranged on the screw rod (51) at the top of the middle limiting member (54).

7. The heavy-load driving balance protection device according to claim 6, wherein Both the bottom limiting member (52) and the top limiting member (55) are detachable nuts.

8. The heavy-load driving balance protection device according to claim 7, characterized in that, The limit induction switch (6) includes a mounting base (61), a light-sensing limit switch transmitting end (62), a bracket (63), and a light-sensing limit switch receiving end (12). The light-sensing limit switch receiving end (12) is fixed on the screw rod (51). A bracket (63) is provided at one end of the fixed base (1) corresponding to the spring limit mechanism (5) at the top. The bracket (63) is sleeved with a mounting base (61). The mounting base (61) is fixed on the bracket (63) by a nut, and a light-sensing limit switch transmitting end (62) is provided on one side of the mounting base (61) facing the light-sensing limit switch receiving end (12). Both the light-sensing limit switch receiving end (12) and the light-sensing limit switch transmitting end (62) are connected to the PLC.

9. The heavy-load driving balance protection device according to claim 8, characterized in that Two sets of the spring limit mechanism (5) are provided in the front-back direction at one end of the rotating frame (2). The light-sensing limit switch receiving end (12) is arranged on the screw rod (51) of one of the spring limit mechanisms (5).

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