Motor tooth press-fitting mechanism of sweeping robot

Abstract

The utility model discloses a floor sweeping robot motor tooth press-fitting mechanism which comprises a press-fitting table, a press-fitting box, a sliding positioning mechanism, an upper jig, a lower jig and a press-fitting air cylinder, the sliding positioning mechanism is arranged on the press-fitting table, the lower jig is fixedly placed on the sliding positioning mechanism, a motor tooth workpiece is borne on the lower jig, and the press-fitting air cylinder is arranged on the press-fitting box. The sliding positioning mechanism drives the lower jig to slide on the press-fitting table in the front-back direction. The press-fitting box is fixedly connected to the press-fitting table, and the sliding positioning mechanism is covered with the press-fitting box. A press-fit air cylinder is arranged on the top face of the press-fit box, the front end of the press-fit air cylinder vertically and downwards extends into the box to be connected with an upper jig, a plurality of annular pressing heads are arranged on the bottom face of the upper jig, a plurality of lower pressing grooves are correspondingly formed in the lower jig, one motor tooth workpiece is contained in each lower pressing groove, and the press-fit air cylinder drives the upper jig to press downwards. The annular pressing head and the lower pressing groove are used for positioning and pressing the upper end and the lower end of the motor tooth workpiece; the mechanism is uniform in pressure, accurate in positioning and high in press-fitting efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of bearing press-fitting equipment, and in particular relates to a motor gear press-fitting mechanism for a sweeping robot. Background Art

[0002] The popularity of smart sweeping robots has brought a lot of convenience to families and freed up a lot of time. The purpose of buying a sweeping robot is to solve problems, not to create trouble. Therefore, the quality of the sweeping robot is very important. In order to ensure this quality, the assembly process of the wheels, roller brushes and side brushes that serve as the hands and feet of the sweeping robot is very particular. A very important step in the assembly process is to press-fit the motor teeth. The motor teeth and the motor output shaft adopt an interference fit. If they are too tight, the motor teeth may expand, and if they are too loose, they may fall off. Among them, the motor teeth that drive the side brush and roller brush to rotate are characterized by a small size. One of the difficulties in press-fitting this type of motor teeth is that it is difficult to ensure the uniformity of pressure during the press-fitting process, as well as the complete alignment between the motor teeth and the shaft. Once the alignment is inaccurate or the pressure is uneven, it is easy to cause damage to both the product and the fixture, resulting in a high scrap rate and large economic losses. Utility Model Content

[0003] In view of the above problems and technical requirements, the utility model provides a motor gear press-fitting mechanism for a sweeping robot. The mechanism adopts two upper and lower press-fitting fixtures to simultaneously position and press-fit the product. The pressure is uniform and the positioning is accurate, which effectively improves the efficiency of motor gear press-fitting.

[0004] The technical scheme of the utility model is as follows: a motor gear pressing mechanism of a sweeping robot comprises a pressing platform, a pressing box, a sliding positioning mechanism, an upper jig, a lower jig and a pressing cylinder, the sliding positioning mechanism is arranged on the pressing platform, one or more lower jigs are fixedly placed on the sliding positioning mechanism, each lower jig carries a plurality of motor gear workpieces, and the sliding positioning mechanism drives the lower jig to slide in the front-to-back direction on the pressing platform; the pressing box is a rectangular box body with an open front side, the pressing box is fixedly connected to the pressing platform, the sliding positioning mechanism cover is arranged inside, and the lower jig in the box is taken and placed through the front side opening; a pressing cylinder is arranged on the top surface of the pressing box, the front end of the pressing cylinder extends vertically downward into the box to connect the upper jig, and a plurality of annular pressing heads are arranged on the bottom surface of the upper jig, and correspondingly, a plurality of lower pressing grooves are arranged on the lower jig, each of which accommodates a motor gear workpiece, the pressing cylinder drives the upper jig to press downward, and the annular pressing head and the lower pressing groove respectively position and press the upper and lower ends of the motor gear workpiece. In the above scheme, an annular pressing head and a lower pressing groove are respectively arranged on the top and bottom of the motor tooth workpiece. The annular pressing head positions the top surface of the motor tooth workpiece, and the lower pressing groove positions the bottom surface of the motor tooth workpiece. The annular pressing head and the lower pressing groove correspond to each other one by one, and the motor tooth workpiece is fixed inside before pressing. During pressing, no skewing or misalignment will occur between the motor tooth workpiece and the shaft, thereby ensuring the accuracy of pressing.

[0005] Furthermore, the sliding positioning mechanism includes a slide rail, a slide plate, a mounting plate and a guide rail cylinder. A pair of slide rails are arranged on a press-fitting table. The slide plate is slidably connected to the slide rails. The mounting plate is fixedly arranged on the slide plate. The mounting plate carries one or more lower jigs. The lower jigs are placed side by side in the longitudinal direction. The guide rail cylinder is arranged in parallel with the slide plate. The guide rail cylinder is fixedly connected to the press-fitting table. The front end of the guide rail cylinder is fixedly connected to the slide plate through a connecting rod. The guide rail cylinder drives the slide plate to slide longitudinally to adjust the position. Multiple jigs are arranged on the mounting plate. Since the mounting plate can slide longitudinally, the upper jig can be docked and pressed with multiple lower jigs one by one. The workpieces on multiple lower jigs can be pressed at one time, so as to achieve the purpose of batch processing and high processing efficiency.

[0006] Furthermore, the press box is also provided with a downward pressure buffer assembly, which includes an intermediate pressure plate, a guide rod and a sliding bearing. A guide rod is provided near each of the four corners of the press box. The guide rod is perpendicular to the press table. The top of the guide rod is connected to the top plate of the press box, and the bottom is connected to the press table. The four corners of the intermediate pressure plate are connected to the guide rod through sliding bearings. The intermediate pressure plate is parallel to the press table. The upper surface of the intermediate pressure plate is connected to the pressing cylinder, and the lower surface is connected to the upper fixture. The intermediate pressure plate can disperse the pressure of the pressing cylinder to the entire intermediate pressure plate. When the intermediate pressure plate transfers the balanced pressure to the lower fixture again, the pressure is more balanced and stable. The sliding connection between the intermediate pressure plate and the guide rod has an anti-vibration effect on the pressing cylinder and the upper fixture, and the positioning is more accurate.

[0007] Furthermore, the intermediate pressure plate and the pressing cylinder are detachably connected, and a clamping seat is provided on the top surface of the intermediate pressure plate, and a clamping slot is provided in the middle of the clamping seat. A flat circular clamping block is provided at the telescopic end of the pressing cylinder, and the flat circular clamping block is inserted into the clamping slot to clamp the two together; a top mounting plate is provided on the bottom surface of the intermediate pressure plate, and the upper fixture is fixedly connected to the top mounting plate by screws, and the clamping seat and the top mounting plate are correspondingly arranged in the middle of the intermediate pressure plate.

[0008] Furthermore, two buffer components are provided on the mounting plate. The buffer components are installed at the inner end of the slide rail, facing the end surface of the slide plate. When the slide plate slides to the innermost side, it contacts the buffer components, and the buffer components limit the slide plate.

[0009] Furthermore, the buffer assembly includes a fixed block, a buffer damper and a buffer spring. The fixed block is connected to the press table by screws. The buffer damper and the buffer spring are installed on the fixed block. The ends of the buffer damper and the buffer spring are aligned with the slide plate. When the slide plate slides to the end, it presses on the buffer damper and the buffer spring at the same time. The buffer damper and the buffer spring have a buffering effect on the slide plate, which can prevent the slide plate from stopping suddenly or coming into hard contact with other components when it slides to the innermost side, and prevent the slide plate from vibrating and affecting the positioning of the workpiece.

[0010] Furthermore, a safety grating is provided on both sides of the opening of the press box, and the safety grating is fixedly arranged perpendicular to the press table. The safety grating can sense the movement of objects on the opening of the press box in real time. The safety grating can prevent people from accidentally entering the equipment when it is in operation, resulting in crushing injuries, and provide safety protection for people.

[0011] Furthermore, the press table is also provided with a start button and an emergency stop button.

[0012] The beneficial effects of the utility model are as follows: 1) The mechanism adopts an upper jig and a lower jig to press-fit the motor gear workpiece at the same time. The motor gear workpiece is clamped and accommodated by the upper jig and the lower jig during the press-fitting process. Therefore, the press-fitting process will not be misaligned, can be fully aligned, and has high positioning accuracy; 2) Multiple lower jigs are placed side by side on the mounting plate, and the upper jig can press-fit the workpiece on each lower jig in turn. The press-fitting process is efficient and more suitable for press-fitting of large quantities of workpieces; 3) An intermediate pressure plate is set to balance the pressure of the pressing cylinder and transmit the pressure downward more stably to prevent damage to the workpiece caused by excessive pressure. The intermediate pressure plate can also stabilize the upper jig and resist the vibration of the pressing cylinder, and the press-fitting stability is better; 4) A safety grating and an emergency stop button are set to protect the operator from injury when an operation error occurs, thereby improving the safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is the overall structural diagram of the press-fitting mechanism of the utility model;

[0014] Figure 2 This is the installation layout of each mechanism on the press table;

[0015] Figure 3 The installation structure diagram of the press cylinder and press box;

[0016] Figure 4 It is the position relationship diagram between the pressing cylinder and the upper fixture;

[0017] Figure 5 It is a structural diagram of the sliding positioning mechanism;

[0018] Figure 6 It is the position relationship diagram of the slide plate, guide rail cylinder and buffer assembly;

[0019] Figure 7 This is the structural diagram of the lower fixture;

[0020] Marked in the figure are: press-fitting table 1, press-fitting box 2, press-fitting cylinder 21, oblate clamping block 211, start button 22, emergency stop button 23, press-down buffer assembly 3, intermediate pressure plate 31, top mounting plate 311, upper fixture 312, annular pressure head 313, clamping seat 314, clamping groove 315, guide rod 32, sliding bearing 33, sliding positioning mechanism 4, slide rail 41, slide plate 42, mounting plate 43, lower fixture 431, lower press groove 432, guide rail cylinder 44, connecting rod 441, buffer assembly 5, fixing block 51, buffer damping 52, buffer spring 53, safety grating 6, motor tooth workpiece 7. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0022] like Figure 1-7 The figure shows the motor gear pressing mechanism of the sweeping robot of the utility model, including a pressing platform 1, a pressing box 2, a sliding positioning mechanism 4, an upper jig 312, a lower jig 431 and a pressing cylinder 21. The sliding positioning mechanism 4 is arranged on the pressing platform 1, and one or more lower jigs are fixedly placed on the sliding positioning mechanism 4. Each lower jig 431 carries a plurality of motor gear workpieces 7. The sliding positioning mechanism 4 drives the lower jig to slide on the pressing platform 1 along the front-rear direction.

[0023] The sliding positioning mechanism 4 includes a slide rail 41, a slide plate 42, a mounting plate 43 and a guide rail cylinder 44. A pair of slide rails 41 are arranged on the press-fitting table 1. The slide plate 42 is slidably connected to the slide rail 41. The mounting plate 43 is fixedly arranged on the slide plate 42. The mounting plate 43 carries one or more lower fixtures 431. The lower fixtures 431 are placed side by side in the longitudinal direction. The guide rail cylinder 44 is arranged in parallel with the slide plate 42. The guide rail cylinder 44 is fixedly connected to the press-fitting table 1. The front end of the guide rail cylinder 44 is fixedly connected to the slide plate 42 through a connecting rod 441. The guide rail cylinder 44 drives the slide plate 42 to slide in the longitudinal direction to adjust the position. Two buffer components 5 are also arranged on the mounting plate 43. The buffer component 5 is installed at the inner end of the slide rail 41, facing the end face of the slide plate 42. When the slide plate 42 slides to the innermost side, it contacts the buffer component 5. The buffer component 5 limits the slide plate 42.

[0024] The buffer assembly 5 includes a fixed block 51, a buffer damper 52 and a buffer spring 53. The fixed block 51 is connected to the press-fitting table 1 by screws. The buffer damper 52 and the buffer spring 53 are installed on the fixed block 51. The ends of the buffer damper 52 and the buffer spring 53 are aligned with the slide plate 42. When the slide plate 42 slides to the end, it presses on the buffer damper 52 and the buffer spring 53 at the same time. The buffer damper 52 and the buffer spring 53 have a buffering effect on the slide plate 42, which can prevent the slide plate 42 from stopping suddenly or coming into hard contact with other components when it slides to the innermost side, and prevent the slide plate from vibrating and affecting the positioning of the workpiece.

[0025] The press box 2 is a rectangular box with an open front side. The press box 2 is fixedly connected to the press table 1, and the sliding positioning mechanism 4 is covered inside. The lower fixture 431 in the box is picked up and placed through the front open side. A safety grating 6 is provided on both sides of the open side of the press box 2. The safety grating 6 is fixedly arranged perpendicular to the press table 1. The safety grating 6 can sense the movement of objects in the open side of the press box 2 in real time. The safety grating 6 can prevent people from accidentally entering the equipment when it is in operation, resulting in crushing injuries, and provide safety protection for people. The press table is also provided with a start button and an emergency stop button.

[0026] A pressing cylinder 21 is provided on the top surface of the press box 2, and the front end of the pressing cylinder 21 extends vertically downward into the box to connect to the upper fixture 312. A plurality of annular pressing heads 313 are provided on the bottom surface of the upper fixture 312. Correspondingly, a plurality of lower pressing grooves 432 are provided on the lower fixture 431, and each lower pressing groove 432 accommodates a motor gear workpiece 7. The pressing cylinder 21 drives the upper fixture 312 to press downward, and the annular pressing head 313 and the lower pressing groove 432 respectively position and press the upper and lower ends of the motor gear workpiece 7.

[0027] The press box 2 is also provided with a down-pressing buffer assembly 3, which includes an intermediate pressing plate 31, a guide rod 32 and a sliding bearing 33. A guide rod 32 is provided near each of the four corners of the press box 2. The guide rod 32 is perpendicular to the press table 1. The top of the guide rod 32 is connected to the top plate of the press box 2, and the bottom is connected to the table surface of the press table 1. The four corners of the intermediate pressing plate 31 are connected to the guide rod 32 through sliding bearings 33. The intermediate pressing plate 31 is parallel to the press table 1. The upper surface of the intermediate pressing plate 31 is connected to the pressing cylinder 21, and the lower surface is connected to the upper fixture 312. The intermediate pressing plate 31 can disperse the pressure of the pressing cylinder 21 to the entire intermediate pressing plate 31. When the intermediate pressing plate 31 transfers the balanced pressure to the lower fixture 431 again, the pressure is more balanced and stable. In addition, the intermediate pressing plate 31 is slidably connected to the guide rod 32, which has an anti-vibration effect on the pressing cylinder 21 and the upper fixture 312, and the positioning is more accurate. The intermediate pressure plate 31 and the pressing cylinder 21 are detachably connected, and a clamping seat 314 is provided on the top surface of the intermediate pressure plate 31, and a clamping groove 315 is provided in the middle of the clamping seat 314. An oblong clamping block 211 is provided at the telescopic end of the pressing cylinder 21, and the oblong clamping block 211 is correspondingly inserted into the clamping groove 315 to clamp the two together; a top mounting plate 311 is provided on the bottom surface of the intermediate pressure plate 31, and an upper fixture 312 is fixedly connected to the top mounting plate 311 by screws, and the clamping seat 314 and the top mounting plate 311 are correspondingly arranged in the middle of the intermediate pressure plate 31.

[0028] The working principle of the utility model is as follows: a plurality of lower jigs 431 loaded with motor gear workpieces 7 are placed one by one on a fixed position of the mounting plate 43, and a limiting or adsorption relationship is formed between the lower jigs 431 and the mounting plate 43, and the lower jigs are kept in a stable state. After being placed in place, the operation is started by the start button 22; the guide cylinder 44 drives the slide plate 42 to move along the slide rail 41, so that a lower jig 431 corresponds to the position of the upper jig 312, and the pressing cylinder 21 drives the intermediate pressing plate 31 to move downward, and the intermediate pressing plate 31 slowly descends along the guide rod 32 until the annular pressure head 313 of the upper jig 312 is pressed on the motor gear workpiece 7, and the intermediate pressing plate 31 Continue to press down to press the motor gear workpiece 7 and the shaft together to achieve an interference connection. After the press-fitting is completed, the middle pressure plate 31 disengages the motor gear workpiece 7 upward, and the guide cylinder 44 drives the slide plate 42 to move again to align the next group of lower fixtures 431 with the upper fixture 312. The upper fixture 312 repeats the above press-fitting process until the motor gear workpieces 7 on all the lower fixtures 431 are press-fitted; in the above press-fitting process, the slide plate 42 is limited by the buffer assembly 5 when it slides to the innermost side. When the safety grating 6 senses that a human hand has reached in, the press-fitting stops and the pressing cylinder 21 is retracted. If the press-fitting fails, the emergency stop button 23 can also be used to control the press-fitting to stop.

[0029] The above are only several preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes and substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. The motor gear pressing mechanism of the sweeping robot is characterized by: It includes a press-fitting table, a press-fitting box, a sliding positioning mechanism, an upper jig, a lower jig and a pressing cylinder. The sliding positioning mechanism is arranged on the press-fitting table, and one or more lower jigs are fixedly placed on the sliding positioning mechanism. Each lower jig carries a plurality of motor gear workpieces, and the sliding positioning mechanism drives the lower jig to slide in the front-to-back direction on the press-fitting table. The press-fitting box is a rectangular box with an open front side, which is fixedly connected to the press-fitting table, and the sliding positioning mechanism cover is arranged inside. The lower jig in the box is taken and placed through the front opening. A pressing cylinder is arranged on the top surface of the press-fitting box, and the front end of the pressing cylinder extends vertically downward into the box to connect with the upper jig. The bottom surface of the upper jig is provided with a plurality of annular pressing heads, and correspondingly, a plurality of lower pressing grooves are provided on the lower jig, each of which accommodates a motor gear workpiece. The pressing cylinder drives the upper jig to press downward, and the annular pressing head and the lower pressing groove respectively position and press the upper and lower ends of the motor gear workpiece.

2. The motor gear pressing mechanism of the sweeping robot according to claim 1, characterized in that: The sliding positioning mechanism includes a slide rail, a skateboard, a mounting plate and a guide rail cylinder. A pair of slide rails are arranged on a press table. The skateboard is slidably connected to the slide rails. The mounting plate is fixedly arranged on the skateboard. The mounting plate carries one or more lower fixtures. The lower fixtures are placed side by side in the longitudinal direction. The guide rail cylinder is arranged parallel to the skateboard. The guide rail cylinder is fixedly connected to the press table. The front end of the guide rail cylinder is fixedly connected to the skateboard through a connecting rod. The guide rail cylinder drives the skateboard to slide longitudinally to adjust its position.

3. The motor gear pressing mechanism of the sweeping robot according to claim 2, characterized in that: The press box is also provided with a downward pressure buffer assembly, which includes an intermediate pressure plate, a guide rod and a sliding bearing. A guide rod is provided near each of the four corners of the press box. The guide rod is perpendicular to the press table. The top of the guide rod is connected to the top plate of the press box, and the bottom is connected to the surface of the press table. The four corners of the intermediate pressure plate are connected to the guide rod through sliding bearings. The intermediate pressure plate is parallel to the press table. The upper surface of the intermediate pressure plate is connected to the pressing cylinder, and the lower surface is connected to the upper fixture.

4. The motor gear pressing mechanism of the sweeping robot according to claim 3, characterized in that: The intermediate pressing plate and the pressing cylinder are detachably connected, a clamping seat is provided on the top surface of the intermediate pressing plate, a clamping slot is provided in the middle of the clamping seat, a flat circular clamping block is provided at the telescopic end of the pressing cylinder, the flat circular clamping block is correspondingly inserted into the clamping slot to clamp the two; a top mounting plate is provided on the bottom surface of the intermediate pressing plate, the upper fixture is fixedly connected to the top mounting plate by screws, and the clamping seat and the top mounting plate are correspondingly arranged in the middle of the intermediate pressing plate.

5. The motor gear pressing mechanism of the sweeping robot according to claim 4, characterized in that: The mounting plate is also provided with two buffer components, which are installed at the inner end of the slide rail and facing the end surface of the slide plate. When the slide plate slides to the innermost side, it contacts the buffer components, and the buffer components limit the slide plate.

6. The motor gear pressing mechanism of the sweeping robot according to claim 5, characterized in that: The buffer assembly includes a fixed block, a buffer damper and a buffer spring. The fixed block is connected to the press table by screws. The buffer damper and the buffer spring are installed on the fixed block. The ends of the buffer damper and the buffer spring are aligned with the slide plate. When the slide plate slides to the end, it presses against the buffer damper and the buffer spring at the same time.

7. The motor gear pressing mechanism of the sweeping robot according to claim 6, characterized in that: A safety grating is correspondingly arranged on both sides of the open side of the press box, and the safety grating is fixedly arranged perpendicular to the press table. The safety grating can sense the movement of objects on the open side of the press box in real time.

8. The motor gear pressing mechanism of the sweeping robot according to claim 7, characterized in that: The press table is also provided with a start button and an emergency stop button.

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