Polishing device for metal product elbows

Abstract

The utility model relates to the technical field of polishing devices, in particular to a polishing device for metal product elbows, which comprises a shell, a handle is fixedly connected to the rear end of the shell, a reducing wheel is rotatably connected to the front end of the inner side of the shell, and a driving wheel is rotatably connected to the rear end of the inner side of the shell. An abrasive belt is wound between the variable-diameter wheel and the driving wheel, the variable-diameter wheel comprises an adjusting seat rotationally connected with the shell, the outer end of the adjusting seat is fixedly connected with a fixing disc, the outer side of the fixing disc is rotationally connected with an adjusting disc, a plurality of sliding grooves are formed in the inner side of the fixing disc, and connecting rods are slidably connected into the sliding grooves; the outer end of the connecting rod extends out of the sliding groove and is fixedly connected with an adjustable arc-shaped plate. According to the elbow polishing device, the variable-diameter wheel is arranged, the external expansion degree of the adjustable arc-shaped plate can be adjusted through a tool, so that the diameter of the variable-diameter wheel is adjusted, elbows with different bending degrees can be polished conveniently, and the applicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding devices, in particular to a grinding device for metal product elbows. Background Art

[0002] There are many kinds of metal products, covering all areas of our lives and production. Common metal products include metal structural parts and metal doors and windows for construction; mechanical parts, molds, tools in industrial production, as well as decorative metal ornaments and metal decorations, etc.

[0003] Metal products need to be polished during production. Polishing can eliminate scratches, pits, protrusions and other defects on the surface of metal products, making the surface smoother and more aesthetically pleasing. Handheld grinders and sanding machines are commonly used to polish metal products. When grinding the elbows of metal products, due to the different bending degrees of different elbows, using the same size of grinding wheel or sanding belt is not easy to meet the use requirements. If the size is large, it is difficult to fully contact the bend of the elbow, resulting in insufficient polishing. If the size is small, the efficiency of polishing will be reduced. Therefore, those skilled in the art provide a grinding device for metal product elbows to solve the problems raised in the above background technology. Utility Model Content

[0004] The purpose of the utility model is to provide a grinding device for metal elbows to solve the following technical problems:

[0005] How to improve the applicability of metal product elbow grinding devices to facilitate grinding of different types of elbows.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A grinding device for metal product elbows, comprising a housing, a handle fixedly connected to the rear end of the housing, a transmission housing fixedly connected between the handle and the housing, a diameter-changing wheel rotatably connected to the inner front end of the housing, a driving wheel rotatably connected to the inner rear end of the housing, and a sanding belt wound between the diameter-changing wheel and the driving wheel;

[0008] The variable diameter wheel comprises an adjustment seat rotatably connected to the housing, the outer end of the adjustment seat is fixedly connected to a fixed disk, the outer side of the fixed disk is rotatably connected to an adjustment disk, a plurality of slide grooves are provided on the inner side of the fixed disk, a connecting rod is slidably connected to the inner side of the slide groove, and the outer end of the connecting rod extends out of the slide groove and is fixedly connected to an adjustable arc plate;

[0009] A plurality of arc grooves are formed around the center of the inner side of the adjusting disk, and an adjusting rod is fixedly connected to the outer side of the lower end of the connecting rod, and the adjusting rod extends into the arc groove and is slidably connected thereto.

[0010] Furthermore, a motor is fixedly arranged inside the handle, and two synchronous pulleys are rotatably connected inside the transmission housing, a synchronous belt is connected between the two synchronous pulleys, one synchronous pulley is fixedly connected to the output end of the motor, and the other synchronous pulley is fixedly connected to the driving wheel;

[0011] Furthermore, a worm wheel and a worm are rotatably connected inside the adjustment seat, the worm is meshedly connected with the worm wheel, the worm wheel is fixedly connected with the adjustment disk, and the outer end of the worm extends out of the adjustment seat and is fixedly connected with the adjustment head;

[0012] Furthermore, the outer ends of the plurality of adjustable arc-shaped plates are sleeved with elastic sleeves;

[0013] Furthermore, a handle is fixedly connected to the upper end of the shell;

[0014] Further, a tensioning assembly is provided on the inner side of the housing;

[0015] Further, the tensioning assembly comprises a rotating frame whose middle part is rotatably connected to the shell, and a tensioning wheel is rotatably connected to the upper end of the rotating frame, and the tensioning wheel contacts the inner surface of the abrasive belt;

[0016] Furthermore, a tension spring is hung between the lower end of the rotating frame and the housing;

[0017] Beneficial effects of the utility model:

[0018] The utility model provides a grinding device for metal product elbows. The grinding device is small in size and convenient for handheld use. A variable diameter wheel is provided. When in use, the degree of expansion of the adjustable arc plate can be adjusted by a tool, thereby adjusting the diameter of the variable diameter wheel, which is convenient for grinding elbows with different bending degrees of metal products. By increasing the diameter of the variable diameter wheel, the contact surface between the sand belt and the elbow is increased, which is convenient for grinding elbows with smaller bending angles and can also ensure the grinding efficiency. By decreasing the diameter of the variable diameter wheel, the contact surface between the sand belt and the elbow is reduced, which is convenient for fully grinding elbows with larger bending angles. The utility model has strong applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings.

[0020] Figure 1 The utility model is a three-dimensional grinding device for metal elbows. Figure 1 ;

[0021] Figure 2 The utility model is a three-dimensional grinding device for metal elbows. Figure 2 ;

[0022] Figure 3It is a structural diagram of a variable diameter wheel diagram of a grinding device for metal elbows proposed by the utility model;

[0023] Figure 4 This is a connection structure diagram of an adjustable arc plate of a grinding device for metal elbows proposed by the utility model;

[0024] Figure 5 This is the internal structure diagram of the adjustment seat of a grinding device for metal elbows proposed by the utility model;

[0025] Figure 6 The utility model discloses an internal structure diagram of a transmission housing of a grinding device for metal elbows.

[0026] Reference numerals:

[0027] 1. Housing; 2. Driving wheel; 3. Variable diameter wheel; 31. Fixed plate; 32. Adjusting plate; 33. Adjusting seat; 331. Worm wheel; 332. Worm; 333. Adjusting head; 34. Adjustable arc plate; 35. Connecting rod; 36. Slide; 37. Adjusting rod; 38. Arc groove; 39. Elastic sleeve; 4. Abrasive belt; 5. Tensioning assembly; 51. Rotating frame; 52. Tensioning wheel; 53. Tension spring; 6. Handle; 7. Transmission housing;

[0028] 8. Motor; 9. Synchronous belt; 10. Synchronous pulley; 11. Handle. DETAILED DESCRIPTION

[0029] 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 of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] Please refer to the attached Figures 1 to 6 As shown, a grinding device for metal product elbows in an embodiment of the utility model includes a shell 1, a handle 6 is fixedly connected to the rear end of the shell 1, a transmission shell 7 is fixedly connected between the handle 6 and the shell 1, a reducing wheel 3 is rotatably connected to the inner front end of the shell 1, a driving wheel 2 is rotatably connected to the inner rear end of the shell 1, and a sanding belt 4 is wound between the reducing wheel 3 and the driving wheel 2.

[0031] The variable diameter wheel 3 includes an adjusting seat 33 rotatably connected to the shell 1, the outer end of the adjusting seat 33 is fixedly connected to the fixed disk 31, the outer side of the fixed disk 31 is rotatably connected to the adjusting disk 32, a plurality of slide grooves 36 are provided on the inner side of the fixed disk 31, a connecting rod 35 is slidably connected inside the slide groove 36, the outer end of the connecting rod 35 extends out of the slide groove 36 and is fixedly connected to an adjustable arc plate 34.

[0032] A plurality of arc grooves 38 are provided around the center of the inner side of the adjusting disk 32, and an adjusting rod 37 is fixedly connected to the outer side of the lower end of the connecting rod 35. The adjusting rod 37 extends into the arc groove 38 and is slidably connected thereto. When the adjusting disk 32 rotates, the position of the arc groove 38 changes, and the connecting rod 35 is pushed to move along the slide groove 36 by the adjusting rod 37, thereby causing the adjustable arc plate 34 to expand or contract outward.

[0033] A motor 8 is fixedly arranged inside the handle 6, and two synchronous pulleys 10 are rotatably connected inside the transmission housing 7, and a synchronous belt 9 is connected between the two synchronous pulleys 10. One synchronous pulley 10 is fixedly connected to the output end of the motor 8, and the other synchronous pulley 10 is fixedly connected to the driving wheel 2. The motor 8 is driven, and the synchronous pulley 10 and the synchronous belt 9 are driven, thereby driving the driving wheel 2 to rotate, and the driving wheel 2 drives the sanding belt 4 to move for grinding.

[0034] The internal rotation of the adjustment seat 33 is connected with a worm wheel 331 and a worm 332, the worm 332 is meshed with the worm wheel 331, and the worm wheel 331 is fixedly connected to the adjustment disk 32. The outer end of the worm 332 extends out of the adjustment seat 33 and is fixedly connected with an adjustment head 333, wherein the adjustment head 333 is a hexagonal head. When adjusting, the adjustment head 333 can be rotated by a hexagonal wrench, thereby driving the worm 332 to rotate, thereby driving the worm wheel 331 to rotate, and then driving the adjustment disk 32 to rotate.

[0035] The outer ends of the multiple adjustable arc plates 34 are sleeved with elastic sleeves 39, which are made of elastic bands and have good elasticity. They do not affect the contraction and expansion of the adjustable arc plates 34, and after being sleeved on the outer ends of the adjustable arc plates 34, the sense of frustration caused by the gaps of the adjustable arc plates 34 during rotation can be reduced.

[0036] A handle 11 is fixedly connected to the upper end of the housing 1 , and the handle 11 is arranged to be convenient for human hand to hold.

[0037] A tensioning assembly 5 is provided on the inner side of the shell 1, and the tensioning assembly 5 includes a rotating frame 51 rotatably connected to the shell 1 in the middle part, and a tensioning wheel 52 is rotatably connected to the upper end of the rotating frame 51, and the tensioning wheel 52 contacts the inner surface of the sanding belt 4, and a tension spring 53 is hung between the lower end of the rotating frame 51 and the shell 1. The tensioning assembly 5 is provided for tensioning the sanding belt 4. Specifically, the tension spring 53 is in a stretched state to provide tension, so that the tensioning wheel 52 at the other end of the rotating frame 51 is tightly fitted with the inner side of the sanding belt 4, thereby tensioning the sanding belt 4.

[0038] Working principle: when in use, the sanding belt 4 is driven to rotate by the driving wheel 2. When grinding, the sanding belt 4 at the outer end of the variable wheel 3 contacts the elbow for grinding. The diameter of the variable wheel 3 is adjustable. When adjusting, the adjusting head 333 is rotated by the tool, thereby driving the worm 332 to rotate, and the worm 332 drives the worm wheel 331 to rotate, and then drives the adjusting disk 32 to rotate. When the adjusting disk 32 rotates, due to the change in the position of the arc groove 38, the connecting rod 35 is pushed along the slide groove 36 by the adjusting rod 37, so that the adjustable arc plate 34 is expanded or contracted, and the diameter of the variable wheel 3 is adjusted. When the diameter of the variable wheel 3 is increased, the contact surface of the sanding belt 4 and the elbow is increased, which is convenient for grinding elbows with smaller bending angles and can also ensure the grinding efficiency. When the diameter of the variable wheel 3 is reduced, the contact surface of the sanding belt 4 and the elbow is reduced, which is convenient for fully grinding elbows with larger bending angles and has strong applicability.

[0039] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A grinding device for a metal elbow, comprising a housing (1), characterized in that: The rear end of the housing (1) is fixedly connected to a handle (6), a transmission housing (7) is fixedly connected between the handle (6) and the housing (1), a diameter-changing wheel (3) is rotatably connected to the inner front end of the housing (1), a driving wheel (2) is rotatably connected to the inner rear end of the housing (1), and a sanding belt (4) is wound between the diameter-changing wheel (3) and the driving wheel (2); The variable diameter wheel (3) comprises an adjustment seat (33) rotatably connected to the housing (1); the outer end of the adjustment seat (33) is fixedly connected to a fixed disk (31); the outer side of the fixed disk (31) is rotatably connected to an adjustment disk (32); a plurality of slide grooves (36) are provided on the inner side of the fixed disk (31); a connecting rod (35) is slidably connected inside the slide groove (36); the outer end of the connecting rod (35) extends out of the slide groove (36) and is fixedly connected to an adjustable arc plate (34); A plurality of arc-shaped grooves (38) are formed on the inner side of the adjusting disk (32) around the center, and an adjusting rod (37) is fixedly connected to the outer side of the lower end of the connecting rod (35), and the adjusting rod (37) extends into the arc-shaped groove (38) and is slidably connected thereto.

2. A grinding device for metal elbows according to claim 1, characterized in that: A motor (8) is fixedly arranged inside the handle (6), and two synchronous pulleys (10) are rotatably connected inside the transmission housing (7), a synchronous belt (9) is connected between the two synchronous pulleys (10), one of the synchronous pulleys (10) is fixedly connected to the output end of the motor (8), and the other synchronous pulley (10) is fixedly connected to the driving wheel (2).

3. A grinding device for metal elbows according to claim 1, characterized in that: The adjusting seat (33) is internally rotatably connected with a worm wheel (331) and a worm (332); the worm (332) is meshingly connected with the worm wheel (331); the worm wheel (331) is fixedly connected with the adjusting disk (32); the outer end of the worm (332) extends out of the adjusting seat (33) and is fixedly connected with an adjusting head (333).

4. A grinding device for metal elbows according to claim 1, characterized in that: The outer ends of the plurality of adjustable arc-shaped plates (34) are sleeved with elastic sleeves (39).

5. A grinding device for metal elbows according to claim 1, characterized in that: A handle (11) is fixedly connected to the upper end of the shell (1).

6. A grinding device for metal elbows according to claim 1, characterized in that: A tensioning assembly (5) is arranged on the inner side of the housing (1).

7. A grinding device for metal elbows according to claim 6, characterized in that: The tensioning assembly (5) comprises a rotating frame (51) whose middle part is rotatably connected to the housing (1); a tensioning wheel (52) is rotatably connected to the upper end of the rotating frame (51); and the tensioning wheel (52) is in contact with the inner surface of the sanding belt (4).

8. A grinding device for metal elbows according to claim 7, characterized in that: A tension spring (53) is hung between the lower end of the rotating frame (51) and the housing (1).

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