Electric push rod with protective structure

Abstract

The utility model discloses an electric push rod with a protection structure, comprising a fixed bottom plate, four corners of the fixed bottom plate are provided with mounting holes, the top end of the fixed bottom plate is fixedly connected with a motor box, one side of the motor box is fixedly connected with a storage box, the motor box is communicated with the bottom end of the storage box, and the storage box is fixedly connected with the motor box. One side of the storage box is fixedly connected with an unlocking box; the driving assembly is arranged on the inner sides of the motor box and the storage box; the telescopic assembly is arranged on the inner side of the storage box; and the self-locking assembly is arranged on the inner side of the unlocking box. Compared with the prior art, the supporting and pushing device has the advantages that the pressure borne by the supporting and pushing device can be monitored, and when the motor stops working, the push rod can be locked to prevent a heavy object from being pushed back.

Description

Technical Field

[0001] This utility model relates to the field of electric linear actuator technology, and in particular to an electric linear actuator with a protective structure. Background Technology

[0002] During operation, the lead screw of an electric linear actuator rotates circumferentially along its axis, causing the jacking tube within the actuator to reciprocate. Driven by the motor, the lead screw continuously rotates, causing the jacking tube to extend outward or retract inward. However, if the motor is not stopped promptly when the jacking tube is subjected to excessive support pressure, the threads between the jacking tube and the lead screw will be stripped, potentially leading to accelerated wear and high temperatures that could cause the actuator to spontaneously combust, posing a significant danger. Manual control, on the other hand, has a certain time delay, making it impossible to precisely control the motor's shutdown.

[0003] However, existing patents have the following drawbacks:

[0004] (1) Existing utility model electric actuators lack protective structures. When the electric actuator supports or pushes a mass under overload, the lead screw and motor will suffer huge damage. The motor will stop working due to damage, and the push of the heavy object may cause an accident, which is unsafe. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the above-mentioned technical defects and provide an electric push rod with a protective structure that can monitor the pressure on the support push and lock the push rod to prevent the heavy object from being pushed back when the motor stops working.

[0006] To solve the above problems, the technical solution of this utility model is: an electric push rod with a protective structure, comprising:

[0007] A fixed base plate is provided, with mounting holes at its four corners. A motor box is fixedly connected to the top of the fixed base plate, and a storage box is fixedly connected to one side of the motor box. The bottom ends of the motor box and the storage box are connected, and an unlocking box is fixedly connected to one side of the storage box.

[0008] A drive assembly is disposed inside a motor box and a storage box. The drive assembly includes a motor, a first synchronous pulley, a second synchronous pulley, and a synchronous belt. The motor is fixedly connected to the top of the inner side of the motor box. The first synchronous pulley is fixedly connected to the end of the drive shaft at the bottom of the motor. A first limiting shaft is fixedly connected to the top of a fixed base plate. The first synchronous pulley is rotatably connected to the first limiting shaft. A second limiting shaft is fixedly connected to the top of the fixed base plate. The second synchronous pulley is rotatably connected to the top of the second limiting shaft. The synchronous belt is sleeved on the outside of the first and second synchronous pulleys.

[0009] A telescopic component, wherein the telescopic component is disposed inside the storage box;

[0010] The self-locking component is located inside the unlocking box.

[0011] Furthermore, the telescopic component includes:

[0012] A rotating column is fixedly connected to the top of the second synchronous pulley, and a slide rail is provided on the outer side of the rotating column;

[0013] A limiting ring is fixedly connected to the inside of the storage box, and a slide rail is provided on the inside of the limiting ring;

[0014] Ball bearings are rotatably connected to the inner sides of slide rail one and slide rail two.

[0015] A lead screw, which is fixedly connected to the top of the rotating column;

[0016] Slide rail three, which is fixedly connected to both sides inside the storage box;

[0017] The slider is slidably connected to the inner side of the slide rail, the slider is threadedly connected to the lead screw, and a connecting pipe is fixedly connected to the top of the slider;

[0018] A push rod is provided at the top of the slider and has an extrusion groove at its bottom. The extrusion groove is slidably connected to the connecting pipe. A connecting shaft is fixedly connected to the top of the inner side of the extrusion groove. A connecting groove is provided at the top of the wall of the connecting pipe. The connecting shaft is slidably connected to the connecting groove.

[0019] A pressure sensor, which is sleeved on the outside of the connecting shaft and fixedly connected to the top of the inner side of the extrusion groove;

[0020] Spring 1 is fitted onto the outside of connecting shaft 1 and is fixedly connected to the bottom of the pressure sensor and the top of the connecting tube.

[0021] Furthermore, the self-locking component includes:

[0022] The positioning protrusion has a groove inside one side of the slider, and the positioning protrusion is slidably connected to the inside of the groove. The top of one side of the positioning protrusion is beveled. The inside of the storage box has several positioning holes on the side connected to the unlocking box, and the top of the inside of the positioning holes is beveled.

[0023] A spring sheet, which is installed inside the groove to support the positioning protrusion;

[0024] A button is located on one side of the unlocking box. A sliding plate is fixedly connected to one side of the button via a fixed shaft. The sliding plate is slidably connected to the inside of the unlocking box. The inside of the unlocking box is fixedly connected to a second connecting shaft. The sliding plate is slidably connected to the second connecting shaft.

[0025] Spring 2, the spring 2 is sleeved on the outside of connecting shaft 2 and fixedly connected between unlocking box and sliding plate;

[0026] The insertion rod is fixedly connected to one side of the sliding plate, and the insertion rod is slidably connected to the positioning hole.

[0027] The advantages of this invention compared to existing technologies are as follows:

[0028] (1) The telescopic component of the electric push rod with protective structure of this utility model has a pressure monitoring function, which can monitor the support pressure on the push rod at all times. When the support pressure exceeds the working capacity of the electric push rod, the motor can be stopped to prevent damage to the motor and lead screw. The self-locking component can lock the push rod that is pushed back to prevent the heavy object from moving, reduce the occurrence of accidents, and make it safer. Attached Figure Description

[0029] Figure 1 This is a perspective view of an electric push rod with a protective structure according to this utility model.

[0030] Figure 2 This is a cross-sectional view of an electric push rod with a protective structure according to this utility model. Figure 1 .

[0031] Figure 3 This is a cross-sectional view of an electric push rod with a protective structure according to this utility model. Figure 2 .

[0032] Figure 4 This is a cross-sectional view of an electric push rod with a protective structure according to this utility model. Figure 3 .

[0033] Figure 5 This is a cross-sectional view of an electric push rod with a protective structure according to this utility model. Figure 4 .

[0034] Figure 6 This is an enlarged view of A, an electric push rod with a protective structure according to this utility model.

[0035] Figure 7 This is a cross-sectional view of an electric push rod with a protective structure according to this utility model. Figure 5 .

[0036] As shown in the figure: 1. Fixed base plate; 2. Mounting hole; 3. Motor box; 4. Storage box; 5. Unlocking box; 6. Drive assembly; 601. Motor; 602. Synchronous pulley one; 603. Limiting shaft one; 604. Limiting shaft two; 605. Synchronous pulley two; 606. Synchronous belt; 7. Telescopic assembly; 701. Rotating column; 702. Slide rail one; 703. Limiting ring; 704. Slide rail two; 705. Ball bearing; 706. Lead screw; 70 7. Slide rail three; 708. Slider; 709. Connecting pipe; 710. Push rod; 711. Extrusion groove; 712. Connecting shaft one; 713. Connecting groove; 714. Pressure sensor; 715. Spring one; 8. Self-locking assembly; 801. Positioning protrusion; 802. Groove; 803. Spring plate; 804. Positioning hole; 805. Button; 806. Sliding plate; 807. Connecting shaft two; 808. Spring two; 809. Insert rod. Detailed Implementation

[0037] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses consistent with some aspects of this disclosure as detailed in the appended claims.

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0039] Example 1:

[0040] like Figures 1 to 4 As shown, an electric push rod with a protective structure includes: a fixed base plate 1, mounting holes 2 at the four corners of the fixed base plate 1, a motor box 3 fixedly connected to the top of the fixed base plate 1, a storage box 4 fixedly connected to one side of the motor box 3, the bottom ends of the motor box 3 and the storage box 4 being connected, and an unlocking box 5 fixedly connected to one side of the storage box 4; a drive assembly 6, which is disposed inside the motor box 3 and the storage box 4; a telescopic assembly 7, which is disposed inside the storage box 4; and a self-locking assembly 8, which is disposed inside the unlocking box 5.

[0041] The drive assembly 6 includes: a motor 601, a first synchronous pulley 602, a second synchronous pulley 605, and a synchronous belt 606. The motor 601 is fixedly connected to the top of the inner side of the motor box 3. The first synchronous pulley 602 is fixedly connected to the end of the drive shaft at the bottom of the motor 601. The top of the fixed base plate 1 is fixedly connected to a first limiting shaft 603. The first synchronous pulley 602 is rotatably connected to the first limiting shaft 603. The top of the fixed base plate 1 is fixedly connected to a second limiting shaft 604. The second synchronous pulley 605 is rotatably connected to the top of the second limiting shaft 604. The synchronous belt 606 is sleeved on the outside of the first synchronous pulley 602 and the second synchronous pulley 605.

[0042] Start motor 601, which drives synchronous pulley 602 to rotate via its drive shaft. Synchronous pulley 602 drives synchronous pulley 605 to rotate synchronously via synchronous belt 606 sleeved on the outside, driving telescopic component 7 to operate. Limiting shaft 603 and limiting shaft 604 restrict the rotation of synchronous pulley 602 and synchronous pulley 605, making the rotation of synchronous pulley 602 and synchronous pulley 605 more stable.

[0043] The telescopic assembly 7 includes: a rotating column 701, a limiting ring 703, a ball bearing 705, a lead screw 706, a slide rail 707, a slider 708, a push rod 710, a pressure sensor 714, and a spring 715. The rotating column 701 is fixedly connected to the top of the synchronous pulley 605. A slide rail 702 is provided on the outer side of the rotating column 701. The limiting ring 703 is fixedly connected to the inner side of the storage box 4. A slide rail 704 is provided on the inner side of the limiting ring 703. The ball bearing 705 is rotatably connected to the inner side of the slide rail 702 and the slide rail 704. The lead screw 706 is fixedly connected to the top of the rotating column 701. The slide rail 707 is fixedly connected to both sides inside the storage box 4. The slider 708 is slidably connected to the inner side of the slide rail 707. 708 is threadedly connected to the lead screw 706. A connecting tube 709 is fixedly connected to the top of the slider 708. A push rod 710 is set at the top of the slider 708 and a pressing groove 711 is opened at the bottom of the push rod 710. The pressing groove 711 is slidably connected to the connecting tube 709. A connecting shaft 712 is fixedly connected to the top of the inner side of the pressing groove 711. A connecting groove 713 is opened at the top of the tube wall of the connecting tube 709. The connecting shaft 712 is slidably connected to the connecting groove 713. A pressure sensor 714 is sleeved on the outside of the connecting shaft 712 and fixedly connected to the top of the inner side of the pressing groove 711. A spring 715 is sleeved on the outside of the connecting shaft 712 and fixedly connected to the bottom of the pressure sensor 714 and the top of the connecting tube 709.

[0044] When the second synchronous wheel 605 rotates, the rotating column 701 fixedly connected to it rotates synchronously. The rotating column 701 is restricted by the ball bearing 705, which makes the rotation of the rotating column 701 more stable and reduces friction and noise, and reduces resistance. The rotating column 701 drives the lead screw 706 at the top to rotate synchronously. The lead screw 706 drives the slider 708, which is restricted in sliding direction by the slide rail 707 and is threadedly connected to the lead screw 706, to slide within the slide rail 707. The slider 708 drives the connecting tube 709 and the push rod 710 to rise, completing the extension of the push rod 710. The motor 601 rotates in the opposite direction, and with the cooperation of the unlocking component 8, the push rod 710 will retract into the storage box 4.

[0045] After the push rod 710 extends, if the required pushing force is greater than the pushing force that the push rod 710 can apply, it will damage the lead screw 706 of the push rod 710 and the motor 601. A monitoring structure is needed to monitor the pushing force applied by the push rod 710. When the push rod 710 contacts the object, the slider 708 continues to rise, causing the connecting tube 709 to compress the spring 715 in the compression groove 711. The pressure sensor 714 monitors the pressure applied by the spring 715. The pressure value can be read through an externally connected device. When the pressure value exceeds the preset value of the pressure sensor 714, the pressure sensor 714 will control the motor 601 to stop working to prevent damage to the motor 601 and some parts.

[0046] The self-locking assembly 8 includes: a positioning protrusion 801, a spring plate 803, a button 805, a spring 808, and a plug 809. A groove 802 is formed inside one side of the slider 708. The positioning protrusion 801 is slidably connected to the inside of the groove 802. The top of one side of the positioning protrusion 801 is beveled. Several positioning holes 804 are formed inside the storage box 4 on the side connecting to the unlocking box 5. The top of the inner side of each positioning hole 804 is beveled. The spring plate 803 is installed inside the groove 802 to support the positioning protrusion 801. The button... Button 805 is located on one side of the unlocking box 5. A sliding plate 806 is fixedly connected to one side of button 805 via a fixed shaft. The sliding plate 806 is slidably connected to the inside of unlocking box 5. The inside of unlocking box 5 is fixedly connected to connecting shaft 2 807. The sliding plate 806 and connecting shaft 2 807 are slidably connected. Spring 2 808 is sleeved on the outside of connecting shaft 2 807 and fixedly connected between unlocking box 5 and sliding plate 806. Insert rod 809 is fixedly connected to one side of sliding plate 806. Insert rod 809 is slidably connected to positioning hole 804.

[0047] When the slider 708 rises, the inclined surface at the top of the inner side of the positioning hole 804 matches the inclined surface at the top of one side of the positioning protrusion 801. As the positioning protrusion 801 rises, the positioning hole 804 pushes the positioning protrusion 801 to retract into the groove 802, allowing the positioning protrusion 801 to rise and sequentially insert into the positioning hole 804. When the pressure sensor 714 detects a pressure value exceeding the preset value, the motor 601 stops working, and the push rod 710 is forced back by the enormous pressure. At this time, the positioning protrusion 801 is inserted into the positioning hole 804. The bottom edge of one side of the positioning protrusion 801 and the bottom edge of the inner side of the positioning hole 804 are both horizontal, so that the positioning protrusion 801 is locked and the slider 708 is locked and stops descending, but the pressure sensor 714 is still in the squeezed state. When the object being pushed is removed, the pressure sensor 714 returns to normal, and the motor 601 can continue to work. Pressing the button 805 causes the sliding plate 806 to drive the insertion rod 809 into the positioning hole 804, pushing the positioning protrusion 801 into the groove 802. The motor 601 is started to retract the push rod 710 into the storage box 4.

[0048] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power. The main controller can be a conventional known device such as a computer for control. The detailed description of known functions and components is omitted in the specific implementation of this disclosure. To ensure the compatibility of the device, the operating methods used are consistent with the parameters of commercially available instruments.

[0049] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electric linear actuator with a protective structure, characterized in that, include: A fixed base plate (1) is provided with mounting holes (2) at the four corners of the fixed base plate (1). A motor box (3) is fixedly connected to the top of the fixed base plate (1). A storage box (4) is fixedly connected to one side of the motor box (3). The bottom ends of the motor box (3) and the storage box (4) are connected. An unlocking box (5) is fixedly connected to one side of the storage box (4). A drive assembly (6) is disposed inside the motor box (3) and the storage box (4). The drive assembly (6) includes a motor (601), a first synchronous pulley (602), a second synchronous pulley (605), and a synchronous belt (606). The motor (601) is fixedly connected to the top of the inner side of the motor box (3). The first synchronous pulley (602) is fixedly connected to the end of the drive shaft at the bottom of the motor (601). The top of the fixed base plate (1) is fixedly connected to a first limiting shaft (603). The first synchronous pulley (602) is rotatably connected to the first limiting shaft (603). The top of the fixed base plate (1) is fixedly connected to a second limiting shaft (604). The second synchronous pulley (605) is rotatably connected to the top of the second limiting shaft (604). The synchronous belt (606) is sleeved on the outside of the first synchronous pulley (602) and the second synchronous pulley (605). Telescopic component (7), the telescopic component (7) is disposed inside the storage box (4); The self-locking component (8) is disposed inside the unlocking box (5).

2. The electric actuator with a protective structure according to claim 1, characterized in that: The telescopic component (7) includes: A rotating column (701) is fixedly connected to the top of the second synchronous pulley (605), and a slide rail (702) is provided on the outer side of the rotating column (701); A limiting ring (703) is fixedly connected to the inside of the storage box (4), and a slide rail (704) is provided on the inside of the limiting ring (703); Ball bearings (705) are tactilely connected to the inner sides of slide rail one (702) and slide rail two (704); A lead screw (706) is fixedly connected to the top of a rotating column (701); Slide rail three (707) is fixedly connected to both sides inside the storage box (4); A slider (708) is slidably connected to the inner side of the slide rail three (707). The slider (708) is threadedly connected to the lead screw (706). A connecting pipe (709) is fixedly connected to the top of the slider (708). A push rod (710) is provided at the top of the slider (708) and a pressing groove (711) is provided at the bottom end of the push rod (710). The pressing groove (711) is slidably connected to the connecting pipe (709). A connecting shaft (712) is fixedly connected to the top of the inner side of the pressing groove (711). A connecting groove (713) is provided at the top of the pipe wall of the connecting pipe (709). The connecting shaft (712) is slidably connected to the connecting groove (713). Pressure sensor (714), the pressure sensor (714) is sleeved on the outside of the connecting shaft (712) and fixedly connected to the top of the inner side of the extrusion groove (711); Spring 1 (715) is sleeved on the outside of connecting shaft 1 (712) and fixedly connected to the bottom of pressure sensor (714) and the top of connecting tube (709).

3. An electric actuator with a protective structure according to claim 2, characterized in that: The self-locking component (8) includes: The positioning protrusion (801) has a groove (802) inside one side of the slider (708), and the positioning protrusion (801) is slidably connected to the inside of the groove (802). The top of one side of the positioning protrusion (801) is a slope. The storage box (4) has several positioning holes (804) inside the side connected to the unlocking box (5). The top of the inside of the positioning hole (804) is a slope. A spring sheet (803) is installed inside the groove (802) to support the positioning protrusion (801); A button (805) is provided on the outside of the unlocking box (5). A sliding plate (806) is fixedly connected to one side of the button (805) via a fixed shaft. The sliding plate (806) is slidably connected to the inside of the unlocking box (5). The inside of the unlocking box (5) is fixedly connected to a connecting shaft two (807). The sliding plate (806) and the connecting shaft two (807) are slidably connected. Spring 2 (808) is sleeved on the outside of connecting shaft 2 (807) and fixedly connected between unlocking box (5) and sliding plate (806); Insert rod (809), the insert rod (809) is fixedly connected to one side of sliding plate (806), and the insert rod (809) is slidably connected to positioning hole (804).

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