Grinding machine

Abstract

The grinding machine comprises a machine frame, a transmission mechanism and a driving mechanism, the transmission mechanism comprises a driving wheel and two driven wheels, the driving wheel is connected with an output shaft of the driving mechanism, and the driving wheel is connected with the two driven wheels through a grinding belt. The rack comprises a fixed plate and a movable plate rotationally installed on the fixed plate through a rotating shaft, one driven wheel is rotationally installed on the side face of the fixed plate, the other driven wheel is rotationally installed on the side face of the movable plate, and an elastic structure is arranged between the fixed plate and the movable plate. The fixed plate and the movable plate are movably arranged, the angle between the fixed plate and the movable plate is limited through the rotating shaft and the elastic structure, the outer circles of tubular workpieces with different outer diameters can be polished and ground, the envelope angle can be close to 180 degrees, hard contact between the abrasive belt and the surfaces of the workpieces is avoided, and the abrasive belt is convenient to replace.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding equipment, in particular to a grinding machine. Background Art

[0002] The grinding consumables of the grinder include grinding wheels, grinding belts, sandpaper, etc., which are often used in many fields such as electrical engineering, fittering, machining, etc. to achieve finishing and surface grinding of workpieces.

[0003] The functions of grinders on the market are relatively simple, generally including a driving mechanism and a transmission mechanism. The transmission mechanism includes a fixed driving wheel and a driven wheel. The driving wheel is connected to the output shaft of the driving mechanism, and the driving wheel and the driven wheel are connected by an abrasive belt. When the driving mechanism is working, it drives the abrasive belt to rotate. The abrasive belt can only grind a single processing surface. If it is necessary to grind the curved surface of the workpiece, the operation is extremely inconvenient, and it is not convenient to replace the abrasive belt. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the above-mentioned technology and to design a grinding machine, and its specific structure is as follows.

[0005] The utility model is designed to provide a grinding machine, comprising a frame, a transmission mechanism and a driving mechanism, wherein the transmission mechanism is mounted on the frame, the transmission mechanism comprises a driving wheel and two driven wheels, the driving wheel is connected to the output shaft of the driving mechanism, and the driving wheel and the two driven wheels are connected via a grinding belt;

[0006] The frame includes a fixed plate and a movable plate rotatably mounted on the fixed plate via a rotating shaft, one of the driven wheels is rotatably mounted on the side of the fixed plate via an axis, and the other driven wheel is rotatably mounted on the side of the movable plate via an axis, and an elastic structure is provided between the fixed plate and the movable plate.

[0007] Preferably, the elastic structure is a torsion spring which is sleeved on the rotating shaft and connected to the fixed plate and the movable plate respectively.

[0008] Preferably, the elastic structure is a tension spring.

[0009] Preferably, the fixed plate comprises a connecting portion and a fixed portion which are arranged at an acute angle and connected to each other, a slot is provided at one end of the movable plate, an outer end of the connecting portion is placed in the slot and connected via the rotating shaft, and one end of the torsion spring is clamped on the connecting portion;

[0010] The driving wheel is installed at the connection between the connecting part and the fixing part, and the two driven wheels are arranged opposite to each other, wherein one of the driven wheels is installed at the outer end of the movable plate, and the other driven wheel is installed at the outer end of the fixing part.

[0011] Preferably, a notch is provided at the connection between the connecting part and the fixing part, and an elastic strip is provided on the fixing part. The elastic strip extends from the outside of the notch to the outside of the connecting part and cooperates with the notch to form a through hole for clamping the circumferential side wall of the driving mechanism, and an adjusting piece for adjusting the size of the through hole is provided between the outer end of the elastic strip and the connecting part.

[0012] Preferably, a protective plate is installed on the side of the fixed plate, and the protective plate is located outside the part of the frosting belt between the driving wheel and one of the driven wheels.

[0013] Preferably, an extension plate is provided on the fixing portion, and a handle located outside the protective plate is provided on the extension plate.

[0014] Preferably, the protective plate is L-shaped.

[0015] The utility model describes a grinder in which a fixed frame and a movable plate are movably arranged, and the angle between the fixed plate and the movable plate is limited by a rotating shaft and an elastic structure, so as to realize polishing and grinding of the outer circle of a tubular workpiece, and the envelope angle can be close to 180 degrees. A driven wheel is set to be movable so as to automatically adapt to the outer diameter of the tubular workpiece, and the tension between the driven wheel and the driving wheel is maintained by the elastic structure.

[0016] The elastic force of the torsion spring can avoid the situation where the sanding belt and the workpiece surface are damaged due to hard contact. And because the consumption of the sanding belt is large, the sanding belt can be easily replaced by adjusting the angle between the fixed plate and the movable plate to improve the replacement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of a grinding machine;

[0018] Figure 2 It is a schematic diagram of the structure of the driving mechanism;

[0019] Figure 3 It is a schematic diagram of the structure of the rack;

[0020] Figure 4 It is a structural schematic diagram of the fixed plate and the movable plate.

[0021] The reference numerals are as follows:

[0022] 1. frame 11, fixed plate 11a, connecting part 11b, fixed part 11c, notch 111, elastic strip 12, movable plate 12a, slot 2, transmission mechanism 21, driving wheel 22, driven wheel 23, frosting belt 3, driving mechanism 31, output shaft 4, rotating shaft 5, torsion spring 6, adjusting member 7, protective plate 8, extension plate 9, handle 10, positioning seat DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0024] Embodiment 1:

[0025] As attached Figure 1-3 As shown, a grinding machine described in this embodiment includes a frame 1, a transmission mechanism 2 and a driving mechanism 3. The transmission mechanism 2 is installed on the frame 1. The transmission mechanism 2 includes a driving wheel 21 and two driven wheels 22 installed on one side of the frame 1. The driving wheel 21 is connected to the output shaft 31 of the driving mechanism 3. The driving wheel 21 and the two driven wheels 22 are connected by a grinding belt 23. Among them, the driving wheel 21 and the output shaft 31 are assembled by threaded connection.

[0026] The frame 1 includes a fixed plate 11 and a movable plate 12 rotatably mounted on the fixed plate 11 through a rotating shaft 4, a driving wheel 21 is movably mounted on the fixed plate 11, a driven wheel 22 is rotatably mounted on the side of the fixed plate 11 through an axis, and another driven wheel 22 is rotatably mounted on the side of the movable plate 12 through an axis, and an elastic structure is provided between the fixed plate 11 and the movable plate 12. Among them, the elastic structure is a torsion spring 5 sleeved on the rotating shaft 4 and connected to the fixed plate 11 and the movable plate 12 respectively.

[0027] In another embodiment, the elastic structure is a tension spring.

[0028] like Figure 4 As shown, preferably, the fixed plate 11 is L-shaped, including a connecting portion 11a and a fixed portion 11b that are arranged at an acute angle and connected to each other, one end of the movable plate 12 is provided with a slot 12a that is a through slot, the outer end of the connecting portion 11a is placed in the slot 12a and is connected through the rotating shaft 4, one end of the torsion spring 5 is clamped on the connecting portion 11a, so that the angle between the fixed plate 11 and the movable plate 12 after the rotating shaft 4 and the torsion spring are assembled is an acute angle.

[0029] The driving wheel 21 is installed at the connection of the connecting portion 11a and the fixed portion 11b, and two driven wheels 22 are arranged opposite to each other, one driven wheel 22 is installed at the outer end of the movable plate 12, and the other driven wheel 22 is installed at the outer end of the fixed portion 11b. The angle between the movable plate 12 and the connecting portion 11a of the fixed plate 11 can be changed to adapt to tubular workpieces with different outer diameters.

[0030] like Figure 2As shown, in this embodiment, one end of the rotating shaft 4 is provided with a limit platform, the torsion spring 5 is against the surface of the movable plate 12 and the limit platform, the rotating shaft 4 is penetrated on the movable plate 12 and the connecting portion 11a and passes through the surface where the card slot 12a is located, and the other end of the rotating shaft 4 is provided with an external thread threadedly connected to the movable plate 12. The outer ends of the fixing portion 11b and the movable plate 12 are bent.

[0031] like Figure 4 As shown, preferably, a notch 11c is provided at the connection of the connecting portion 11a and the fixing portion 11b, the driving wheel 21 is placed in the notch 11c, an elastic strip 111 is provided on the fixing portion 11b, the elastic strip 111 extends from the outside of the notch 11c to the outside of the connecting portion 11a, and is movably matched with the notch 11c to form a through hole for clamping the circumferential side wall of the driving mechanism 3, an adjusting member 6 for adjusting the size of the through hole is provided between the outer end of the elastic strip 111 and the connecting portion 11a, the torsion spring 5 is arranged near the through hole, the end of the elastic strip 111 connected to the fixing portion 11b is arc-shaped and integrally formed therewith, and the end of the elastic strip 111 connected to the connecting portion 11a is long strip-shaped.

[0032] In this embodiment, the adjusting member 6 is an adjusting screw threadably connected to the connecting portion 11 a , which facilitates installation and disassembly of the driving mechanism 3 .

[0033] like Figure 3 As shown, an L-shaped protective plate 7 is installed on the side of the fixed plate 11, and the protective plate 7 is located on the outside of a portion of the frosting belt 23 between the driving wheel 21 and one of the driven wheels 22, so that the frosting belt 23 between the two driven wheels 22 and corresponding to the movable plate 12 is exposed, which is convenient for processing the outer surface of the round tube and prevents the dust generated during the grinding process from splashing onto the user.

[0034] In this embodiment, a plurality of positioning seats 10 are provided at intervals on the outer edge of the fixing plate 11 , and the protection plate 7 is assembled on the positioning seats 10 by screws.

[0035] Specifically, the fixing portion 11b is provided with an extension plate 8, and the extension plate 8 is provided with a handle 9 located outside the protective plate 7. The handle 9 is vertically arranged on the side of the frame 1, so that the workpiece can be polished by grasping the handle 9 while holding the driving mechanism 3, making the polishing operation more stable.

[0036] In this embodiment, the extension plate 8 is arranged on the outer edge of the fixing portion 11 b , the handle 9 is arranged on the same side as the protective plate 7 , and the driving mechanism 3 and the handle 9 are respectively located on both sides of the frame 1 .

[0037] The present utility model is not limited to the above-mentioned optimal implementation mode. Anyone can derive other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in the shape or structure, all those having the same or similar technical solutions as the present application fall within the protection scope of the present utility model.

Claims

1. A grinding machine, characterized in that: The invention comprises a frame (1), a transmission mechanism (2) and a driving mechanism (3), wherein the transmission mechanism (2) is mounted on the frame (1), the transmission mechanism (2) comprises a driving wheel (21) and two driven wheels (22), the driving wheel (21) is connected to an output shaft (31) of the driving mechanism (3), and the driving wheel (21) and the two driven wheels (22) are connected via a grinding belt (23); The frame (1) comprises a fixed plate (11) and a movable plate (12) rotatably mounted on the fixed plate (11) via a rotating shaft (4); one of the driven wheels (22) is rotatably mounted on the side of the fixed plate (11) via the shaft; the other driven wheel (22) is rotatably mounted on the side of the movable plate (12) via the shaft; and an elastic structure is provided between the fixed plate (11) and the movable plate (12).

2. The grinding machine according to claim 1, characterized in that: The elastic structure is a torsion spring (5) sleeved on the rotating shaft (4) and connected to the fixed plate (11) and the movable plate (12) respectively; Alternatively, the elastic structure is a tension spring.

3. The grinding machine according to claim 2, characterized in that: The fixed plate (11) comprises a connecting portion (11a) and a fixed portion (11b) which are arranged at an acute angle and connected to each other; a clamping groove (12a) is provided at one end of the movable plate (12); the outer end of the connecting portion (11a) is placed in the clamping groove (12a) and connected via the rotating shaft (4); one end of the torsion spring (5) is clamped on the connecting portion (11a); The driving wheel (21) is installed at the connection between the connecting part (11a) and the fixing part (11b), and the two driven wheels (22) are arranged opposite to each other, wherein one of the driven wheels (22) is installed at the outer end of the movable plate (12), and the other driven wheel (22) is installed at the outer end of the fixing part (11b).

4. The grinding machine according to claim 3, characterized in that: A notch (11c) is provided at the connection between the connecting portion (11a) and the fixing portion (11b); an elastic strip (111) is provided on the fixing portion (11b); the elastic strip (111) extends from the outside of the notch (11c) to the outside of the connecting portion (11a) and is movably matched with the notch (11c) to form a through hole for clamping the circumferential side wall of the driving mechanism (3); and an adjusting member (6) for adjusting the size of the through hole is provided between the outer end of the elastic strip (111) and the connecting portion (11a).

5. The grinding machine according to claim 3, characterized in that: A protective plate (7) is installed on the side of the fixed plate (11), and the protective plate (7) is located outside a portion of the grinding belt (23) between the driving wheel (21) and one of the driven wheels (22).

6. The grinding machine according to claim 5, characterized in that: An extension plate (8) is provided on the fixing portion (11b), and a handle (9) located outside the protective plate (7) is provided on the extension plate (8).

7. The grinding machine according to claim 5 or 6, characterized in that: The protective plate (7) is L-shaped.

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