Concrete floor polishing device
By introducing overload protection components into the concrete floor grinding device, the motor overload problem caused by hard debris is solved, and the stable operation and protection of the equipment is achieved.
Patent Information
- Application Number
- CN202422143563.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-02
- Publication Date
- 2025-08-08
- Estimated Expiration
- 2034-09-02
AI Technical Summary
Existing concrete floor grinding devices are prone to get stuck when encountering hard debris, resulting in overload of the motor and risk of damage.
A concrete floor grinding device including an overload protection component is designed, which consists of a first transmission shaft, a second transmission shaft, a sliding shaft, a sliding sleeve and an elastic member. Through the fitting of the toothed structure and the coordination of the elastic member, energy overload occurs when the power mechanism is stuck, and overload protection is provided.
It effectively avoids motor overload caused by hard debris, protects the power mechanism, prevents damage to the device, and ensures the stable operation of the equipment.
Smart Images
Figure CN223198700U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of floor grinding equipment, in particular to a concrete floor grinding device. Background Art
[0002] With the increasing prevalence of automated transportation in logistics and warehousing, various automated vehicles are placing increasingly high demands on the flatness of warehouse floors. While concrete laser paving machine technology is advancing, it's still difficult to fully meet the required floor flatness, necessitating the use of a concrete floor grinding device for fine floor polishing. A concrete floor grinding device can polish the floor to a smooth and even finish, improving the overall performance and aesthetic appeal of the concrete floor. However, existing floor grinding devices have the following drawbacks: The floor often contains debris, such as hard metal scraps. Accidentally getting such debris caught in the device can cause the device to jam. If not promptly addressed, it can also cause motor overload and even damage. Utility Model Content
[0003] The purpose of the utility model is to provide a concrete floor grinding device which can provide overload protection.
[0004] The utility model provides a concrete floor grinding device, comprising a protective shell, a power mechanism installed on the top of the protective shell, a push rod installed on one side of the protective shell, a walking assembly and a grinding assembly installed on the bottom of the protective shell, and an overload protection assembly and a transmission mechanism installed inside the protective shell;
[0005] The overload protection assembly includes a first transmission shaft, a second transmission shaft, a sliding shaft, a sliding sleeve, and an elastic member; wherein the outer edge of the bottom end of the first transmission shaft and the outer edge of the top end of the second transmission shaft are both provided with tooth structures, and the bottom end of the first transmission shaft and the top end of the second transmission shaft are engaged through the tooth structures; the bottom end of the second transmission shaft is connected to the sliding shaft, and the sliding sleeve is provided on the outer surface of the sliding shaft; the elastic member is provided on the outer surface of the sliding shaft, and its two ends are respectively connected to the bottom end of the second transmission shaft and the top end of the sliding sleeve;
[0006] The output end of the power mechanism is connected to the top end of the first transmission shaft, the bottom end of the sliding sleeve is connected to the input end of the transmission mechanism, and the output end of the transmission mechanism is connected to the grinding assembly.
[0007] In some embodiments, the tooth-like structures are triangular teeth or saw-shaped teeth.
[0008] In some embodiments, the outer wall of the sliding shaft is provided with one or more limit keys along the axial direction, and the inner wall of the sliding sleeve is provided with one or more limit grooves matching the limit keys. The sliding sleeve is arranged on the outside of the sliding shaft by snapping the limit keys into the corresponding limit grooves.
[0009] In some embodiments, a plurality of limit keys are evenly distributed along the circumference of the sliding shaft, and a plurality of limit grooves are evenly distributed along the circumference of the inner wall of the sliding sleeve.
[0010] In some embodiments, the elastic member is a pressure spring.
[0011] In some embodiments, the grinding assembly includes a dust cover fixedly connected to the bottom end of the protective shell, a turntable provided below the dust cover, and grinding discs distributed at the bottom of the turntable; the turntable is connected to the output end of the transmission mechanism.
[0012] Furthermore, a support plate is provided at the center of the bottom end of the turntable, the output end of the transmission mechanism passes through the turntable, and the end of the output end is connected to the support plate.
[0013] In some embodiments, a support frame is installed in the protective shell, and the overload protection component and the transmission mechanism are installed on the support frame.
[0014] Furthermore, the support frame includes a horizontal plate and several vertical plates connected to the bottom end of the horizontal plate; the overload protection component is installed on the top of the horizontal plate, the transmission mechanism is located below the horizontal plate and installed on the vertical plates, and the sliding sleeve in the overload protection component passes through the horizontal plate and is connected to the transmission mechanism below.
[0015] Compared with the prior art, the present invention has the following characteristics:
[0016] The utility model provides overload protection for the power mechanism by arranging an overload protection component between the power mechanism and the transmission mechanism; when the grinding component is accidentally caught in hard debris and becomes stuck, the output shaft of the power mechanism can still keep rotating, thereby avoiding energy overload of the power mechanism. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0018] Figure 1 This is a schematic diagram of the overall structure of the floor grinding device in an embodiment of the present utility model;
[0019] Figure 2 This is a bottom view of the floor grinding device in the embodiment of the present utility model;
[0020] Figures 3-4 This is a structural diagram of an overload protection component in an embodiment of the present utility model;
[0021] Figure 5It is a schematic diagram of the structure of the interior of the protective shell in an embodiment of the present utility model.
[0022] Figure numerals: protective shell 100, support frame 110, horizontal plate 111, vertical plate 112; power mechanism 200; push rod 300; walking assembly 400, wheel shaft 410, wheel 420, fixed plate 430; grinding assembly 500, dust cover 510, turntable 520, grinding sheet 530, support plate 540; overload protection assembly 600, first transmission shaft 610, first tooth structure 611, second transmission shaft 620, second tooth structure 621, sliding shaft 630, limit key 631, sliding sleeve 640, limit groove 641, elastic member 650; transmission mechanism 700, third transmission shaft 710, first bevel gear 720, second bevel gear 730, fourth transmission shaft 740, third bevel gear 750, fourth bevel gear 760. DETAILED DESCRIPTION
[0023] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0024] The following will refer to Figures 1 to 5 , the specific structure of the floor grinding device in the embodiment of the present invention is described in detail. The floor grinding device in the embodiment of the present invention includes a protective housing 100, a power mechanism 200 mounted on the top of the protective housing 100, a push rod 300 mounted on one side of the protective housing 100, a walking assembly 400 and a grinding assembly 500 mounted on the bottom of the protective housing 100, and an overload protection assembly 600 and a transmission mechanism 700 mounted inside the protective housing 100. The power mechanism 200, the overload protection assembly 600, and the transmission mechanism 700 are connected in sequence. The overload protection assembly 600 is used to provide overload protection for the power mechanism 200. In this embodiment, the power mechanism 200 is a motor.
[0025] Specifically, the overload protection assembly 600 includes a first transmission shaft 610, a second transmission shaft 620, a sliding shaft 630, a sliding sleeve 640, and an elastic member 650. A first toothed structure 611 is provided on the outer edge of the bottom end of the first transmission shaft 610, and a second toothed structure 621 is provided on the outer edge of the top end of the second transmission shaft 620. The toothed structures engage the bottom end of the first transmission shaft 610 and the top end of the second transmission shaft 620. The bottom end of the second transmission shaft 620 is connected to the sliding shaft 630, which is then covered with a sliding sleeve 640. The elastic member 650 is sleeved on the outside of the sliding sleeve 640, with its ends respectively connected to the bottom end of the second transmission shaft 620 and the top end of the sliding sleeve 640. The output end of the power mechanism 200 is connected to the top end of the first transmission shaft 610, the bottom end of the sliding shaft 630 is connected to the input end of the transmission mechanism 700, and the output end of the transmission mechanism 700 is connected to the grinding assembly 500. In this embodiment, the elastic member 650 is a pressure spring, and the first tooth structure 611 and the second tooth structure 621 are triangular teeth or saw-shaped teeth.
[0026] Furthermore, one or more limit keys 631 are axially disposed on the outer wall of the sliding shaft 630, and one or more limit grooves 641 are disposed on the inner wall of the sliding sleeve 640 to match the limit keys 631. The sliding sleeve 640 is sleeved over the sliding shaft 630, and the limit keys 631 on the outer wall of the sliding shaft 630 engage with the corresponding limit grooves 641. Preferably, the multiple limit keys 631 are evenly distributed along the circumference of the sliding shaft 630, and the limit grooves 641 are also evenly distributed along the circumference of the sliding sleeve 640. The limit keys 631 and limit grooves 641 act as limiters to prevent relative rotation between the sliding shaft 630 and the sliding sleeve 640.
[0027] In this embodiment, the walking assembly 400 is a walking wheel, which includes a wheel axle 410 installed at the rear bottom end of the protective shell 100, and wheels 420 installed at both ends of the wheel axle 410; specifically, two fixed plates 430 are installed at the rear bottom end of the protective shell 100, and the wheel axle 410 passes through the two fixed plates 430 and is rotatably connected to the two fixed plates 430.
[0028] In this embodiment, the grinding assembly 500 includes a dust cover 510 fixedly connected to the bottom end of the protective shell 100, a turntable 520 arranged below the dust cover 510, and grinding plates 530 distributed at the bottom of the turntable 520; wherein, the dust cover 510 is used to isolate dust and prevent dust from entering the grinding assembly 500.
[0029] In this embodiment, the transmission mechanism 700 includes a third transmission shaft 710, a first bevel gear 720, a second bevel gear 730, a fourth transmission shaft 740, a third bevel gear 750, a fourth bevel gear 760 and an output rotating shaft; the bottom end of the sliding sleeve 640 is fixedly connected to the third transmission shaft 710, and the third transmission shaft 710, the first bevel gear 720, the second bevel gear 730, the fourth transmission shaft 740, the third bevel gear 750, the fourth bevel gear 760 and the output rotating shaft are connected in sequence.
[0030] The output shaft passes through the protective housing 100, through the dust cover 510 located above the turntable 520, and is fixedly connected to the middle of the turntable 520 of the grinding assembly 500. Preferably, a support plate 540 is provided at the center of the bottom end of the turntable 520 to support the turntable 520, and the end of the output shaft is connected to the support plate 540.
[0031] In this embodiment, a support frame 110 is also installed within the protective housing 100 to provide support and position limiting for the overload protection assembly 600 and transmission mechanism 700 within the protective housing 100. Specifically, the support frame 110 includes a horizontal plate 111 and a plurality of vertical plates 112 connected to the bottom end of the horizontal plate 111. The overload protection assembly 600 is mounted on the top end of the horizontal plate 111, and the transmission mechanism 700 is located below the horizontal plate 111 and mounted on the vertical plates 112. The sliding sleeve 640 in the overload protection assembly 600 passes through the horizontal plate 111 and connects to the transmission mechanism 700 below. Furthermore, a fourth transmission shaft 740 in the transmission mechanism 700 is horizontally arranged through the vertical plates 112.
[0032] The working principle of the above concrete floor grinding device is as follows:
[0033] The grinding device is moved by a push rod 300, powered by the power mechanism 200. The overload protection assembly 600 and transmission mechanism 700 transmit this power to the grinding assembly 500. The output shaft in the transmission mechanism 700 rotates the turntable 520 in the grinding assembly 500, and the grinding discs 530 on the turntable 520 grind and level the concrete floor. If the grinding assembly 500 becomes stuck, the overload protection assembly 600 is triggered to provide overload protection for the power mechanism 200.
[0034] The principle of the overload protection component 600 providing overload protection for the power mechanism 200 is as follows:
[0035] When the grinding assembly 500 is stuck in rotation, the transmission mechanism 700 and the second transmission shaft 620 cannot rotate, and the power mechanism 200 continues to drive the first transmission shaft 610. Since the first transmission shaft 610 and the second transmission shaft 620 are engaged with each other through triangular teeth or saw-shaped teeth, the force-bearing surfaces of the first transmission shaft 610 and the second transmission shaft 620 are inclined surfaces. The driving force on the second transmission shaft 620 is decomposed into a downward force, which drives the second transmission shaft 620 to compress the elastic member 650 and move downward, and the first transmission shaft 610 and the second transmission shaft 620 are separated. Figure 4 The power mechanism 200 drives the first transmission shaft 610 to rotate to prevent overload.
[0036] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A concrete floor grinding device, characterized by: It includes a protective shell, a power mechanism installed on the top of the protective shell, a hand push rod installed on one side of the protective shell, a walking component and a grinding component installed on the bottom of the protective shell, and an overload protection component and a transmission mechanism installed inside the protective shell; The overload protection assembly includes a first transmission shaft, a second transmission shaft, a sliding shaft, a sliding sleeve, and an elastic member; wherein the outer edge of the bottom end of the first transmission shaft and the outer edge of the top end of the second transmission shaft are both provided with a toothed structure, and the bottom end of the first transmission shaft and the top end of the second transmission shaft are engaged with each other through the toothed structure; the bottom end of the second transmission shaft is connected to the sliding shaft, and the sliding sleeve is provided on the outer surface of the sliding shaft; the elastic member is provided on the outer surface of the sliding shaft, and its two ends are respectively connected to the bottom end of the second transmission shaft and the top end of the sliding sleeve; The output end of the power mechanism is connected to the top end of the first transmission shaft, the bottom end of the sliding sleeve is connected to the input end of the transmission mechanism, and the output end of the transmission mechanism is connected to the grinding assembly.
2. The concrete floor grinding device according to claim 1, characterized in that: The tooth-like structure is a triangular tooth or a saw-shaped tooth.
3. The concrete floor grinding device according to claim 1, characterized in that: The outer wall of the sliding shaft is provided with one or more limit keys along the axial direction, and the inner wall of the sliding sleeve is provided with one or more limit grooves matching the limit keys. The sliding sleeve is mounted on the outside of the sliding shaft by snapping the limit keys into the corresponding limit grooves.
4. The concrete floor grinding device according to claim 3, characterized in that: The plurality of limit keys are evenly distributed along the circumference of the sliding shaft, and the plurality of limit grooves are evenly distributed along the circumference of the inner wall of the sliding sleeve.
5. The concrete floor grinding device according to claim 1, characterized in that: The elastic member is a pressure spring.
6. The concrete floor grinding device according to claim 1, characterized in that: The grinding assembly includes a dust cover fixedly connected to the bottom end of the protective shell, a turntable arranged below the dust cover, and grinding sheets distributed on the bottom of the turntable; the turntable is connected to the output end of the transmission mechanism.
7. The concrete floor grinding device according to claim 6, characterized in that: A support plate is provided at the center of the bottom end of the turntable. The output end of the transmission mechanism passes through the turntable, and the end of the output end is connected to the support plate.
8. The concrete floor grinding device according to claim 1, characterized in that: A support frame is installed in the protective shell, and the overload protection component and the transmission mechanism are installed on the support frame.
9. The concrete floor grinding device according to claim 8, characterized in that: The support frame includes a horizontal plate and several vertical plates connected to the bottom end of the horizontal plate; the overload protection component is installed on the top of the horizontal plate, the transmission mechanism is located below the horizontal plate and installed on the vertical plates, and the sliding sleeve in the overload protection component passes through the horizontal plate and is connected to the transmission mechanism below.