Round tube metal grinding device for fitness equipment production

Abstract

The present invention discloses a circular tube metal grinding device for use in the production of fitness equipment, relates to the technical field of metal parts production of fitness equipment, and solves the problem that the existing circular tube metal parts are manually ground with high labor intensity, low work efficiency, and poor grinding effect on metal parts. The circular tube metal grinding device for use in the production of fitness equipment includes a mounting assembly; the mounting column is fixedly mounted on the top of a support base. After the device fixes the circular tube metal tube on the top of a rotating control wheel through the inner wall through an inner tube clamp, the grinding transmission assembly and the grinding positioning assembly can automatically grind the surface of the circular tube metal part, which is easy to operate, liberates labor, and improves the work efficiency of grinding the circular tube metal part by 50%, and the grinding pressure can be adjusted through a pressure avoidance assembly, thereby ensuring that the grinding pressure on the surface of the metal part is constant, the grinding effect is good, and the yield rate is greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of fitness equipment metal parts production, and more specifically, particularly relates to a round tube metal grinding device used in fitness equipment production. Background Art

[0002] With the improvement of people's health awareness, more and more people will strengthen their bodies through fitness in their spare time. Fitness requires the use of fitness equipment. Common fitness equipment includes treadmills, dumbbells, etc. Different fitness equipment can exercise muscles in different parts, thereby enhancing various indicators of people's bodies.

[0003] In the production process of fitness equipment, round tube metal parts are needed. Qualified round tube metal parts can be used as parts such as armrests and brackets in fitness equipment. Before installation, round tube metal parts need to be ground to meet the use standards and smoothness indicators before they can be used in the production and assembly of fitness equipment.

[0004] In the existing round tube metal parts, the surface of the round tube metal parts is ground by manually holding a grinding device, and the metal parts or the grinding device need to be continuously rotated to completely grind the annular outer surface of the metal parts. The labor intensity is high, the steps are extremely complicated, and the work efficiency is low. In addition, the grinding device is manually controlled to grind the metal parts, and the balance of the grinding pressure cannot be guaranteed. The grinding effect of the metal parts is poor, the yield rate is low, and the flexibility and practicality are not high.

[0005] Therefore, in view of this, the existing structure and defects are studied and improved, and a round tube metal grinding device for the production of fitness equipment is provided, in order to achieve a more practical purpose. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a circular tube metal grinding device for the production of fitness equipment to solve the problems that the existing circular tube metal parts are ground by manually holding the grinding device during grinding, and the metal parts or the grinding device need to be continuously rotated to completely grind the annular outer surface of the metal parts, which has high labor intensity, complicated steps, low work efficiency, and the grinding pressure cannot be balanced when the grinding device is manually controlled to grind the metal parts, resulting in poor grinding effect on the metal parts, low yield rate, and low flexibility and practicality.

[0007] The purpose and effect of the round tube metal grinding device for fitness equipment production of the present invention are achieved by the following specific technical means:

[0008] A tube-type metal grinding device for the production of fitness equipment, including a mounting assembly;

[0009] The mounting assembly includes a support base and a mounting column, a grinding positioning assembly is mounted on the top of the mounting column, and the mounting column is fixedly mounted on the top of the support base, and a grinding transmission assembly is mounted on the outside of the support base;

[0010] The grinding transmission assembly includes a driving motor, a lifting control wheel, a connecting rod and a rotating control wheel. The driving motor is fixedly mounted on the bottom of the supporting base, and the lifting control wheel and the bottom of the connecting rod are rotated from left to right in sequence and connected to the top of the supporting base.

[0011] The grinding positioning assembly includes a positioning mechanism and a grinding mechanism, wherein the positioning mechanism is composed of a bottom positioning disk and a top control disk, wherein the bottom positioning disk is fixedly mounted on the side surface of the top of the mounting column, and the top control disk is rotatably connected to the top of the bottom positioning disk;

[0012] The grinding mechanism comprises a follower and a grinding device. The follower is inserted into the interior of the bottom positioning plate, and the grinding device is fixedly installed on the top of the follower.

[0013] Furthermore, the follower is composed of an active follower block and three driven follower blocks, and the four followers are arranged around the inside of the bottom positioning plate, and the angle between adjacent followers is ninety degrees.

[0014] Furthermore, the side shape of the follower is an "I" shape, and the middle vertical rod of the follower is a synchronization rod. An arc-shaped synchronization groove is provided inside the disk body of the top control disk, and the synchronization rod is inserted into the synchronization groove. The grinding device is fixedly mounted on the top horizontal plate of the follower.

[0015] Furthermore, the bottom transverse plate of the follower is a "T"-shaped track block, and a track groove is provided inside the plate body of the bottom positioning plate, and the track block is inserted into the track groove.

[0016] Furthermore, a pressure avoidance component is installed at the bottom of the track block of the active follower block, and the pressure avoidance component is composed of an adjusting rod, an adjusting pressure plate and a pressure top spring. One end of the rod body of the adjusting rod is rotatably connected to the inside of the bottom positioning plate, and the rod body of the adjusting rod passes through the bottom of the track block of the active follower block. The sheet shape of the adjusting pressure plate is a regular polygon design, and the adjusting pressure plate is inserted into the bottom of the track block of the active follower block. The pressure top spring is sleeved on the outside of the adjusting rod, and the two ends of the pressure top spring are respectively fixedly connected to the bottom of the track block of the active follower block and the side of the adjusting pressure plate.

[0017] Furthermore, an adjusting threaded hole is provided inside the adjusting pressing plate, and a thread is provided outside the rod body of the adjusting rod, and the adjusting rod is screwed into the adjusting threaded hole through the rod body thread.

[0018] Furthermore, a lifting control plate is provided inside the installation column, a "T"-shaped lifting block is provided on one side of the lifting control plate, and the lifting block is inserted into the interior of the installation column, and the bottom of the rotating control wheel is rotatably connected to the side of the plate body of the lifting control plate.

[0019] Furthermore, a reciprocating screw is provided on the top of the lifting control wheel, and the reciprocating screw is transmission connected to the lifting block, the lifting control wheel, the connecting rod and the rotating control wheel are all gear designs, and the lifting control wheel, the connecting rod and the rotating control wheel are connected by gear transmission, and the driving motor is transmission connected to the lifting control wheel.

[0020] Furthermore, a avoidance hole is provided inside the plate body of the lifting control plate, and the inner diameter of the avoidance hole is larger than the outer diameter of the connecting rod. The rod body of the connecting rod passes through the inside of the avoidance hole, and the top of the connecting rod is rotatably connected to the inside of the bottom positioning plate.

[0021] Furthermore, an inner tube clamp is fixedly installed on the top of the rotating control wheel.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. When the device is in use, after the round tube metal tube is fixed on the top of the rotating control wheel through the inner wall by the inner tube clamp, the grinding transmission component and the grinding positioning component can automatically grind the surface of the round tube metal part, which is easy to operate, liberates labor, and improves the work efficiency of the grinding processing of the round tube metal part by 50%. The grinding pressure can be adjusted by the pressure avoidance component to ensure that the grinding pressure on the surface of the metal part is constant, the grinding effect is good, and the yield rate is greatly improved. The pressure avoidance component can also avoid large external convex obstacles on the surface of the metal part, avoiding the phenomenon of the protrusion outside the metal part jamming the device. It is stable to use, and the flexibility and practicality of the device are improved.

[0024] 2. The grinding positioning assembly can be fitted on the surface of metal parts to perform grinding processing on the metal parts, and the grinding positioning assembly can adapt to the processing of round tube-like metal parts with different outer diameters. According to the size of the outer diameter of the round tube-like metal parts, the adjusting rod can drive the adjusting pressure plate to move inward through the adjusting threaded hole when it rotates, and the adjusting pressure plate can drive the active follower block to move inward and fit the surface of the metal part through the pressure top spring, and when the active follower block moves, under the cooperation of the four synchronization rods and the synchronization groove, the top control disk rotates to make the four followers move synchronously to fit the grinding disks of the four grinding devices on the surface of the round tube-like metal, so that the surface of the round tube-like metal parts can be ground, which can adapt to the grinding processing of metal parts with different specifications of outer diameters and has strong adaptability.

[0025] 3. The grinding transmission assembly can drive the metal parts fixed by the inner tube clamp to rotate reciprocatingly and move up and down, thereby completing the complete grinding process of the outer surface of the metal parts. When the driving motor rotates, it can drive the lifting control wheel to rotate. The lifting control wheel, the connecting rod and the rotating control wheel rotate synchronously through the gear teeth. When the lifting control wheel rotates, the reciprocating screw rod can drive the lifting control plate to move up and down reciprocatingly through the lifting block. The rotating control wheel is rotatably connected to the top of the lifting control plate, so that the rotating control wheel can move up and down synchronously with the lifting control plate. The connecting rod can always connect the lifting control wheel and the rotating control wheel when the lifting control plate is lifted or lowered, so that the rotating control wheel can always rotate when it moves up and down, so that the inner tube clamp can also drive the fixed round tube metal parts to rotate for grinding. It is easy to use, has a high degree of automation, and liberates labor.

[0026] 4. The grinding pressure can be adjusted through the pressure avoidance component. When the grinding disc of the grinding device is attached to the surface of the metal part, continue to rotate the adjusting rod to compress the pressure spring by adjusting the pressure plate, thereby changing the pressure of the pressure spring on the follower. The grinding pressure of the grinding device on the surface of the metal part at the top of the follower is flexible to use and can adapt to the grinding operation under different circumstances. At the same time, when there is a large protrusion on the surface of the metal part, the pressure spring can also be compressed to drive the grinding device to avoid the obstacle, thus avoiding the phenomenon of the device being stuck and failing. It is stable to use and has strong durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the present invention.

[0028] Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0029] Figure 3 It is a schematic diagram of the structure of the positioning mechanism of the present invention after being disassembled.

[0030] Figure 4 The present invention Figure 3 Schematic diagram of the structure at the bottom.

[0031] Figure 5 It is a schematic diagram of the structure of the grinding mechanism of the present invention after disassembly.

[0032] Figure 6 It is a schematic diagram of the structure of the grinding transmission assembly and the mounting assembly after being disassembled.

[0033] Figure 7 It is a schematic diagram of the internal structure of a circular tube-like metal part when the present invention performs grinding processing.

[0034] Figure 8 The present invention Figure 2 Schematic diagram of the enlarged structure of part A in the middle.

[0035] Fig. 9 The present invention Figure 7 Schematic diagram of the enlarged structure of part B in the middle.

[0036] In the figure, the corresponding relationship between the component names and the figure numbers is as follows:

[0037] 1. Installation assembly; 101. Support base; 102. Installation column; 1021. Lifting control board; 1022. Lifting block; 1023. Avoidance hole; 2. Grinding transmission assembly; 201. Driving motor; 202. Lifting control wheel; 2021. Reciprocating screw rod; 203. Connecting rod; 204. Rotating control wheel; 2041. Inner tube clamp; 3. Positioning mechanism; 301. Bottom positioning plate; 3011. Track groove; 302. Top control plate; 3021. Synchronous groove; 4. Grinding mechanism; 41. Follower; 411. Active follower block; 4111. Synchronous rod; 4112. Track block; 412. Driven follower block; 402. Grinding device; 5. Pressure avoidance assembly; 501. Adjustment rod; 502. Adjustment pressure plate; 5021. Adjustment threaded hole; 503. Pressure top spring. DETAILED DESCRIPTION

[0038] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0039] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Example:

[0042] As attached Figure 1To Attachment Fig. 9 As shown:

[0043] The present invention provides a round tube metal grinding device for producing fitness equipment, comprising a mounting assembly 1;

[0044] The mounting assembly 1 includes a support base 101 and a mounting column 102. A grinding positioning assembly is mounted on the top of the mounting column 102. The grinding positioning assembly can be attached to the surface of a metal part to grind the metal part. The mounting column 102 is fixedly mounted on the top of the support base 101. A grinding transmission assembly 2 is mounted on the outside of the support base 101.

[0045] The grinding transmission assembly 2 includes a driving motor 201, a lifting control wheel 202, a connecting rod 203 and a rotating control wheel 204. The driving motor 201 is fixedly mounted on the bottom of the supporting base 101, and the bottoms of the lifting control wheel 202 and the connecting rod 203 are rotated from left to right in sequence and connected to the top of the supporting base 101.

[0046] An inner tube clamp 2041 is fixedly installed on the top of the rotating control wheel 204, and the round tube metal piece can be fixed on the top of the rotating control wheel 204 through the inner tube clamp 2041;

[0047] The grinding positioning assembly includes a positioning mechanism 3 and a grinding mechanism 4. The positioning mechanism 3 is composed of a bottom positioning disk 301 and a top control disk 302. The bottom positioning disk 301 is fixedly mounted on the side of the top of the mounting column 102, and the top control disk 302 is rotatably connected to the top of the bottom positioning disk 301.

[0048] The grinding mechanism 4 includes a follower 41 and a grinding device 402. The follower 41 is inserted into the bottom positioning plate 301, and the grinding device 402 is fixedly installed on the top of the follower 41.

[0049] The grinding device 402 and the driving motor 201 are electrically connected to an external power supply and a control device. The specific structure and working principle thereof are existing mature technologies and will not be described in detail here.

[0050] The grinding positioning assembly can be attached to the surface of metal parts to grind them:

[0051] Among them, the follower 41 is composed of an active follower block 411 and three driven follower blocks 412, and the four followers 41 are arranged in a circle inside the bottom positioning plate 301, and the angle between adjacent followers 41 is ninety degrees. During use, the grinding device 402 on the top of the four followers 41 can evenly surround the surface of the round tube-like metal parts to grind the metal parts, and the processing is comprehensive and the processing effect is good.

[0052] Among them, the bottom horizontal plate of the follower 41 is a "T"-shaped track block 4112, and the bottom positioning plate 301 is provided with a track groove 3011 inside the plate body, and the track block 4112 is inserted into the track groove 3011. During use, the track block 4112 can limit the moving trajectory of the follower 41 through the track groove 3011, so that the follower 41 will not be skewed or twisted during the movement, causing the device to get stuck and fail, and it is stable to use.

[0053] Among them, a pressure avoidance component 5 is installed at the bottom of the track block 4112 of the active follower block 411, and the pressure avoidance component 5 is composed of an adjusting rod 501, an adjusting pressure plate 502 and a pressure top spring 503. One end of the rod body of the adjusting rod 501 is rotatably connected to the inside of the bottom positioning plate 301, and the rod body of the adjusting rod 501 passes through the bottom of the track block 4112 of the active follower block 411. The sheet shape of the adjusting pressure plate 502 is a regular polygon design, and the adjusting pressure plate 502 is plugged into the bottom of the track block 4112 of the active follower block 411. The pressure top spring 503 is sleeved on the outside of the adjusting rod 501, and the two ends of the pressure top spring 503 are respectively fixedly connected to the bottom of the track block 4112 of the active follower block 411 and the side of the adjusting pressure plate 502. In use, the pressure avoidance component 5 The inner diameter of the grinding positioning assembly can be adjusted, so that the grinding positioning assembly can adapt to the processing of round tube-like metal parts with different outer diameters, and the grinding pressure can be adjusted through the pressure avoidance assembly 5. When the grinding disk of the grinding device 402 is attached to the surface of the metal part, the adjusting rod 501 can continue to be rotated to compress the pressure top spring 503 by adjusting the pressing plate 502, thereby changing the pressure of the pressure top spring 503 on the follower 41. The grinding pressure of the grinding device 402 on the surface of the metal part at the top of the follower 41 is flexible to use and can adapt to the operation of grinding processing under different situations. At the same time, when there is a large protrusion on the surface of the metal part, the pressure top spring 503 can also be compressed to drive the grinding device 402 to avoid the obstacle, thereby avoiding the phenomenon of the device being stuck and failing. It is stable to use and has strong durability.

[0054] The side shape of the follower 41 is an "I" shape, and the middle vertical rod of the follower 41 is a synchronization rod 4111. The top control plate 302 is provided with an arc-shaped synchronization groove 3021 inside the plate body, and the synchronization rod 4111 is inserted into the synchronization groove 3021. The grinding device 402 is fixedly mounted on the top horizontal plate of the follower 41. In use, according to the size of the outer diameter of the round tube metal part, the adjustment rod 501 can adjust the grinding inner diameter of the grinding positioning assembly when it rotates. The adjusting pressing plate 502 is provided with an adjustment threaded hole 5021 inside the plate body, and the rod body of the adjustment rod 501 is provided with a thread outside. The adjustment rod 501 is screwed on the adjustment threaded hole 501 through the rod body thread. 21, when the adjusting rod 501 rotates, it can drive the adjusting pressure plate 502 to move inward through the adjusting threaded hole 5021, and the adjusting pressure plate 502 can drive the active follower block 411 to move inward and fit the surface of the metal part through the pressure top spring 503. When the active follower block 411 moves, under the cooperation of the four synchronization rods 4111 and the synchronization groove 3021, the top control disk 302 rotates to make the four followers 41 move synchronously and fit the grinding disks of the four grinding devices 402 to the surface of the round tube metal, so that the surface of the round tube metal part can be ground, which can adapt to the grinding of metal parts with different specifications of outer diameters and has strong adaptability.

[0055] The grinding transmission assembly 2 can drive the metal piece fixed by the inner tube fixture 2041 to rotate and move up and down cyclically, thereby completing the complete grinding process of the outer surface of the metal piece:

[0056] Among them, a reciprocating screw rod 2021 is provided on the top of the lifting control wheel 202, and the reciprocating screw rod 2021 is transmission-connected with the lifting block 1022. The lifting control wheel 202, the connecting rod 203 and the rotating control wheel 204 are all gear designs, and the lifting control wheel 202, the connecting rod 203 and the rotating control wheel 204 are transmission-connected by gear teeth. The driving motor 201 is transmission-connected with the lifting control wheel 202. In use, when the driving motor 201 rotates, it can drive the lifting control wheel 202 to rotate, and the lifting control wheel 202, the connecting rod 203 and the rotating control wheel 204 rotate synchronously through the gear teeth. A lifting control plate 1021 is provided inside the mounting column 102, and a "T"-shaped lifting block 1022 is provided on one side of the lifting control plate 1021, and the lifting block 1022 is plugged into the mounting column 10 2, the bottom of the rotating control wheel 204 is rotatably connected to the side of the plate body of the lifting control plate 1021. When the lifting control wheel 202 rotates, the reciprocating screw rod 2021 can drive the lifting control plate 1021 to move up and down cyclically through the lifting block 1022. The rotating control wheel 204 is rotatably connected to the top of the lifting control plate 1021, so that the rotating control wheel 204 can move up and down synchronously with the lifting control plate 1021. The connecting rod 203 can always connect the lifting control wheel 202 and the rotating control wheel 204 when the lifting control plate 1021 is lifted or lowered, so that the rotating control wheel 204 can always rotate when moving up and down, so that the inner tube clamp 2041 can also drive the fixed round tube metal parts to rotate for grinding processing, which is easy to use, has a high degree of automation, and liberates labor.

[0057] Among them, an avoidance hole 1023 is provided inside the plate body of the lifting control plate 1021, and the inner diameter of the avoidance hole 1023 is larger than the outer diameter of the connecting rod 203. The rod body of the connecting rod 203 passes through the inside of the avoidance hole 1023, and the top of the connecting rod 203 is rotatably connected to the inside of the bottom positioning plate 301. This design ensures that the connecting rod 203 will not hinder the up and down movement of the lifting control plate 1021 during use, and the use is stable and smooth.

[0058] The specific usage and function of this embodiment are as follows:

[0059] In the present invention, the round tube metal piece is fixed inside the rotating control wheel 204 through the inner tube clamp 2041, and the adjusting rod 501 is rotated to make the grinding disk of the grinding mechanism 4 fit on the surface of the metal piece. When the adjusting rod 501 is rotated, it can drive the adjusting pressing plate 502 to move inward through the adjusting threaded hole 5021, and the adjusting pressing plate 502 can drive the active follower block 411 to move inward and fit on the surface of the metal piece through the pressure top spring 503. When the active follower block 411 moves, under the cooperation of the four synchronization rods 4111 and the synchronization groove 3021, the top control disk 302 rotates to make the four followers 41 move synchronously to make the four grinding devices The grinding disc 402 is attached to the surface of the round tube metal, and the grinding pressure can be adjusted by the pressure avoidance component 5. When the grinding disc of the grinding device 402 is attached to the surface of the metal part, the adjusting rod 501 is continuously rotated to compress the pressure top spring 503 by adjusting the pressing plate 502, thereby changing the pressure of the pressure top spring 503 on the follower 41. The grinding pressure of the grinding device 402 on the surface of the metal part at the top of the follower 41 is flexible to use and can adapt to the grinding operation under different situations. After the power of the grinding device 402 and the driving motor 201 is turned on, the device can automatically perform a grinding operation on the surface of the metal part. The grinding transmission group The inner tube clamp 2041 can drive the metal part fixed by the inner tube clamp 2041 to rotate reciprocatingly and move up and down, thereby completing the complete grinding process on the outer surface of the metal part. When the driving motor 201 rotates, it can drive the lifting control wheel 202 to rotate. The lifting control wheel 202, the connecting rod 203 and the rotating control wheel 204 rotate synchronously through the gear teeth. When the lifting control wheel 202 rotates, the reciprocating screw rod 2021 can drive the lifting control plate 1021 to move up and down reciprocatingly through the lifting block 1022. The rotating control wheel 204 is rotatably connected to the top of the lifting control plate 1021, so that the rotating control wheel 204 can follow the lifting control plate 1021. 21 moves up and down in a synchronous cycle, and the connecting rod 203 can always connect the lifting control wheel 202 and the rotating control wheel 204 when the lifting control plate 1021 is lifted or lowered, so that the rotating control wheel 204 can always rotate when moving up and down, so that the inner tube clamp 2041 can also drive the fixed round tube metal part to rotate for grinding. When there is a large protrusion on the surface of the metal part, the pressure top spring 503 can also be compressed to drive the grinding device 402 to avoid the obstacle, thereby avoiding the phenomenon of the device being stuck and failing. After the grinding process is completed, turn off the power of the drive motor 201 and the grinding device 402 and then remove the metal part.

[0060] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A round tube metal grinding device for the production of fitness equipment, characterized in that: The invention comprises a mounting assembly (1); The mounting assembly (1) comprises a support base (101) and a mounting column (102), a grinding positioning assembly is mounted on the top of the mounting column (102), and the mounting column (102) is fixedly mounted on the top of the support base (101), and a grinding transmission assembly (2) is mounted on the outside of the support base (101); The grinding transmission assembly (2) comprises a driving motor (201), a lifting control wheel (202), a connecting rod (203) and a rotating control wheel (204); the driving motor (201) is fixedly mounted on the bottom of the supporting base (101); and the bottoms of the lifting control wheel (202) and the connecting rod (203) are rotatably connected to the top of the supporting base (101) in sequence from left to right; The grinding positioning assembly comprises a positioning mechanism (3) and a grinding mechanism (4), wherein the positioning mechanism (3) is composed of a bottom positioning disk (301) and a top control disk (302), wherein the bottom positioning disk (301) is fixedly mounted on the side surface of the top of the mounting column (102), and the top control disk (302) is rotatably connected to the top of the bottom positioning disk (301); The grinding mechanism (4) comprises a follower (41) and a grinding device (402), wherein the follower (41) is inserted into the interior of the bottom positioning plate (301), and the grinding device (402) is fixedly mounted on the top of the follower (41); The follower (41) is composed of an active follower block (411) and three passive follower blocks (412), and the four followers (41) are arranged around the bottom positioning plate (301), and the angle between adjacent followers (41) is ninety degrees; The side shape of the follower (41) is an "I" shape, and the middle vertical rod of the follower (41) is a synchronization rod (4111), the top control plate (302) is provided with an arc-shaped synchronization groove (3021) inside the plate body, and the synchronization rod (4111) is inserted into the synchronization groove (3021), and the grinding device (402) is fixedly mounted on the top horizontal plate of the follower (41); The bottom horizontal plate of the follower (41) is a "T"-shaped track block (4112), and a track groove (3011) is provided inside the plate body of the bottom positioning plate (301), and the track block (4112) is inserted into the track groove (3011); A pressure avoidance component (5) is installed at the bottom of the track block (4112) of the active follower block (411), and the pressure avoidance component (5) is composed of an adjustment rod (501), an adjustment pressure plate (502) and a pressure top spring (503). One end of the rod body of the adjustment rod (501) is rotatably connected to the inside of the bottom positioning plate (301), and the rod body of the adjustment rod (501) passes through the bottom of the track block (4112) of the active follower block (411). The shape of the plate body of the adjustment pressure plate (502) is a regular polygon design, and the adjustment pressure plate (502) is plugged into the bottom of the track block (4112) of the active follower block (411). The pressure top spring (503) is sleeved on the outside of the adjustment rod (501), and the two ends of the pressure top spring (503) are respectively fixedly connected to the bottom of the track block (4112) of the active follower block (411) and the side of the adjustment pressure plate (502); The adjusting pressing sheet (502) is provided with an adjusting threaded hole (5021) inside the sheet body, and the adjusting rod (501) is provided with threads outside the rod body, and the adjusting rod (501) is screwed into the adjusting threaded hole (5021) through the rod body threads; A lifting control panel (1021) is provided inside the installation column (102), a "T"-shaped lifting block (1022) is provided on one side of the lifting control panel (1021), and the lifting block (1022) is plugged into the inside of the installation column (102), and the bottom of the rotating control wheel (204) is rotatably connected to the side of the plate body of the lifting control panel (1021); A reciprocating screw rod (2021) is provided on the top of the lifting control wheel (202), and the reciprocating screw rod (2021) is connected to the lifting block (1022) in a transmission manner. The lifting control wheel (202), the connecting rod (203) and the rotating control wheel (204) are all gear-designed, and the lifting control wheel (202), the connecting rod (203) and the rotating control wheel (204) are connected to each other through gear transmission, and the driving motor (201) is connected to the lifting control wheel (202) in a transmission manner. When in use, the round tube metal piece is fixed inside the rotating control wheel (204) through the inner tube clamp (2041), and the adjusting rod (501) is rotated to make the grinding disc of the grinding mechanism (4) fit on the surface of the metal piece. When the adjusting rod (501) is rotated, the adjusting pressing plate (502) can be driven to move inwards through the adjusting threaded hole (5021), and the adjusting pressing plate (502) can be driven to move the active follower block (411) inwards to fit on the surface of the metal piece through the pressure top spring (503). When the active follower block (411) moves, under the cooperation of the four synchronous rods (4111) and the synchronous groove (3021), the top control plate (302) rotates to make the four followers (41) move synchronously to make the grinding discs of the four grinding devices (402) fit on the round tube. The surface of the metal-like part is provided with a grinding pressure that can be adjusted by a pressure avoidance component (5). When the grinding disc of the grinding device (402) is attached to the surface of the metal part, the adjusting rod (501) is continuously rotated to compress the pressure top spring (503) by adjusting the pressing plate (502), thereby changing the pressure of the pressure top spring (503) on the follower (41), and the grinding pressure of the grinding device (402) on the surface of the metal part at the top of the follower (41); after the power of the grinding device (402) and the driving motor (201) is turned on, the device automatically performs a grinding operation on the surface of the metal part, and the grinding transmission component (2) can drive the metal part fixed by the inner tube clamp (2041) to rotate reciprocatingly and move up and down, thereby completing a complete grinding process on the outer surface of the metal part; When the driving motor (201) rotates, it can drive the lifting control wheel (202) to rotate. The lifting control wheel (202), the connecting rod (203) and the rotating control wheel (204) rotate synchronously through the gear teeth. When the lifting control wheel (202) rotates, the reciprocating screw rod (2021) can drive the lifting control plate (1021) to move up and down cyclically through the lifting block (1022). The rotating control wheel (204) is rotatably connected to the top of the lifting control plate (1021), so that the rotating control wheel (204) can move up and down synchronously with the lifting control plate (1021). The connecting rod (203) is moved up and down synchronously during the lifting. When the lowering control plate (1021) is raised or lowered, it can always be connected to the lifting control wheel (202) and the rotating control wheel (204), so that the rotating control wheel (204) can always rotate when moving up and down, so that the inner tube clamp (2041) can also drive the fixed round tube metal part to rotate for grinding. When there is a protrusion on the surface of the metal part, the pressure spring (503) can also be compressed to drive the grinding device (402) to avoid the obstacle, thereby avoiding the phenomenon of the device being stuck and failing. After the grinding process is completed, the power of the drive motor (201) and the grinding device (402) is turned off and the metal part can be removed.

2. The round tube metal grinding device for fitness equipment production according to claim 1, characterized in that: The lifting control plate (1021) is provided with an avoidance hole (1023) inside the plate body, and the inner diameter of the avoidance hole (1023) is larger than the outer diameter of the connecting rod (203). The rod body of the connecting rod (203) passes through the inside of the avoidance hole (1023), and the top of the connecting rod (203) is rotatably connected to the inside of the bottom positioning plate (301).

3. The round tube metal grinding device for fitness equipment production according to claim 1, characterized in that: An inner tube clamp (2041) is fixedly mounted on the top of the rotating control wheel (204).

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