Bicycle hub production grinding device capable of achieving fixed-axis rotary grinding

Abstract

The invention relates to the technical field of bicycle accessory machining, in particular to a bicycle hub production grinding device capable of performing fixed-axis rotary grinding, which comprises a grinding shaft, a grinding tool bit, a clamping mechanism and a coaxial positioning mechanism, the clamping mechanism comprises two clamping assemblies, and each clamping assembly comprises two clamping plates which are symmetrically arranged up and down; the coaxial positioning mechanism comprises a vertically-arranged second guide structure, a movable block, two fixed shaft abutting structures and a feeding structure, the movable block is arranged on the second guide structure in a sliding mode, the grinding shaft is installed in the middle of the movable block, and the two fixed shaft abutting structures are arranged on the upper side and the lower side of the movable block correspondingly; after the movable block is fixed to the second guide structure through the two fixed shaft abutting structures, the two fixed shaft abutting structures abut against the middle of the hub. The clamping mechanism and the coaxial positioning mechanism are arranged, so that the uniformity of the thickness of the hub wall is realized, and the quality and the consistency of products are improved.

Description

Technical Field

[0001] The invention relates to the technical field of bicycle accessory processing, in particular to a bicycle hub production grinding device capable of fixed-axis rotation grinding. Background Art

[0002] In the bicycle manufacturing industry, the hub is a key component that connects the wheel hub and the axle. The processing accuracy and molding quality of the hub directly affect the driving performance and service life of the bicycle. With the continuous development of the bicycle market and consumers' pursuit of high-quality products, the processing requirements for hubs are getting higher and higher.

[0003] Patent application number CN119282874A discloses a bicycle hub accessory production device, which arranges a slidable slide rod and a detection rod at the end of the grinding shaft, and uses the centrifugal force of the rotation of the grinding shaft to adjust the position of the grinding mechanism, so that the grinding block at the end of the slide rod can adapt to inner walls of different diameters, thereby achieving one-time grinding of the inside of the hub and reducing the number of grinding times for a single hub.

[0004] Although the above scheme achieves one-time grinding of the inner wall with varying diameters, the position of the hub on the push rod is affected by the manufacturing accuracy of the push rod, which may cause the axis of the cylinder where the outer wall of the hub is located to deviate from the axis of the grinding shaft. At this time, the rotation of the grinding roller will cause the side of the inner wall of the hub close to the axis of the grinding shaft to be grinded thicker, while the other side of the inner wall of the hub is grinded thinner, ultimately resulting in the axis of the hollow cylinder machined from the inner wall of the hub being non-collinear with the axis of the cylinder where the outer wall of the hub is located, affecting the quality of the finished hub. Summary of the invention

[0005] In view of the above problems, a bicycle hub production grinding device capable of fixed-axis rotation grinding is provided. By setting a clamping mechanism and a coaxial positioning mechanism, the uniformity of the hub wall thickness is achieved, thereby improving the quality and consistency of the product.

[0006] In order to solve the problems of the prior art, the present invention provides a bicycle hub production grinding device capable of fixed-axis rotation grinding, comprising a grinding shaft capable of rotating around its own axis and a grinding cutter head arranged at the end of the grinding shaft, and also comprising a clamping mechanism and a coaxial positioning mechanism; the clamping mechanism comprises two clamping assemblies, the two clamping assemblies are respectively used to clamp the two ends of the hub, and the clamping assembly comprises two clamping plates symmetrically arranged up and down; the coaxial positioning mechanism comprises a second guide structure vertically arranged at one end of the clamped hub, a movable block, two fixed-axis abutment structures and a feed structure arranged at the lower end of the second guide structure and capable of pushing the grinding cutter head to move toward the inside of the hub, the movable block is slidably arranged on the second guide structure, the grinding shaft is installed in the middle of the movable block, the two fixed-axis abutment structures are respectively arranged on the upper and lower sides of the movable block, and when the two fixed-axis abutment structures fix the movable block on the second guide structure, the two fixed-axis abutment structures both abut against the middle of the hub.

[0007] Preferably, the fixed-axis abutment structure includes a horizontally arranged positioning plate, an arc-shaped positioning block and a third control structure capable of controlling the positioning plate to move along the second guide structure; one end of the positioning plate is movably connected to the second guide structure; and the arc-shaped positioning block is arranged at the other end of the positioning plate.

[0008] Preferably, the fixed-axis abutment structure further comprises a sliding connection assembly arranged on one side of the positioning plate, and the guiding direction of the sliding connection assembly is the same as the feeding direction of the feeding structure, and the arc-shaped positioning block is mounted on the sliding connection assembly.

[0009] Preferably, both upper and lower ends of the movable block are provided with mounting grooves, buffer components are arranged in both mounting grooves, and one end of the buffer component protrudes from the mounting groove, and when the fixed axis abutment structure moves toward the movable block, the fixed axis abutment structure contacts the buffer component first.

[0010] Preferably, the second guide structure includes a vertical plate and at least two fourth guide rods; the lower end of the vertical plate is connected to the feed structure; the two fourth guide rods are arranged parallel to each other, and the two fourth guide rods are connected to the vertical plate, and the movable block is slidably connected to the two fourth guide rods.

[0011] Preferably, the clamping mechanism also includes two first control structures and a horizontal adjustment structure; the two first control structures are respectively arranged at the two ends of the clamping assembly, and the first control structures are used to control the two clamping plates in the clamping assembly to approach each other; the horizontal adjustment structure is connected to the two clamping assemblies, and the horizontal adjustment structure is used to adjust the distance between the two clamping assemblies.

[0012] Preferably, the first control structure includes two guide connection components, a drive structure and two first guide structures; the two guide connection components are respectively connected to the same clamping plates in the two clamping components; the two ends of the drive structure are connected to the two guide connection components; and the two first guide structures are respectively connected to the two guide connection components.

[0013] Preferably, the horizontal adjustment structure includes a second control structure and multiple linkage rods; the two ends of the second control structure are respectively connected to the clamping plates at the same position in the two clamping assemblies; the multiple linkage rods are evenly distributed on the two clamping assemblies, and the two ends of the linkage rods are connected to the two clamping plates in the clamping assemblies.

[0014] Preferably, the guide connection assembly includes a first guide rod, a connecting plate, two first moving blocks slidably arranged on the first guide rod and two first springs; the two first moving blocks are connected to the clamping plates at the same position in the two clamping assemblies; the two ends of the first spring are respectively abutted against the end of the first guide rod and the first moving block.

[0015] Preferably, a positioning block is provided on one side of the clamping plate. When the two clamping plates in the clamping assembly clamp the hub, the two positioning blocks abut against each other to form a truncated cone-shaped inner cavity that matches the shape of the end of the hub. A buffer connection assembly is provided on one side of the positioning block, and the buffer connection assembly connects the positioning block and the clamping plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention provides a clamping mechanism and a coaxial positioning mechanism, the clamping mechanism includes two clamping assemblies, the clamping assembly adopts two clamping plates which are symmetrically arranged up and down, which can be in a separated state before the hub is placed, so as to form a sufficient accommodating space, and is convenient for the rapid placement of the hub. After the hub is placed, the upper clamping plate moves downward and closely abuts against the hub, providing a stable support point, ensuring that the hub will not rotate or displace during the grinding process, thereby ensuring the accuracy and safety of the grinding. The coaxial positioning mechanism makes the position of the grinding shaft adjustable through the sliding cooperation between the second guide structure and the movable block. The setting of the two fixed-axis abutment structures first ensures that the axis of the grinding shaft is colinear with the axis of the cylinder where the outer wall of the hub is located, and then fixes the position of the grinding shaft by applying a downward force to the movable block, thereby ensuring the stability of the grinding process and ensuring that the relative position of the grinding shaft and the hub remains unchanged during the grinding process, which is conducive to achieving uniform grinding of the inner wall of the hub, thereby achieving uniform thickness of the hub wall and improving product quality and consistency.

[0017] 2. The present invention is provided with a positioning plate, an arc-shaped positioning block and a third control structure. The arc-shaped positioning block can be embedded between the two clamping components and tightly abutted against the outer wall of the hub, thereby ensuring the colinearity of the grinding shaft axis and the cylindrical axis where the outer wall of the hub is located, thereby improving the accuracy of the grinding process. The movable block is slidably arranged on the second guide structure. When the two positioning plates abut against the movable block under the action of the two third control structures, the position of the movable block is effectively fixed, thereby enhancing the stability of the grinding shaft during rotation and reducing the deviation caused by vibration.

[0018] 3. The present invention is provided with a sliding connection assembly, which slidingly connects the positioning plate and the arc-shaped positioning plate, thereby ensuring that the axes of the grinding shaft and the outer wall of the hub are in line during the grinding process, thereby improving the accuracy and stability of the grinding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The invention discloses a stereoscopic diagram of a bicycle hub production grinding device capable of fixed-axis rotation grinding.

[0020] Figure 2 The utility model is a top view of a bicycle hub production grinding device capable of fixed-axis rotation grinding according to the present invention.

[0021] Figure 3 yes Figure 2 Stereoscopic cross-sectional view at AA in the middle.

[0022] Figure 4 The invention discloses a stereoscopic diagram of a grinding axis and a coaxial positioning mechanism in a bicycle hub production grinding device capable of fixed-axis rotation grinding.

[0023] Figure 5 The invention discloses a stereoscopic diagram of a grinding shaft, a grinding cutter head, a fourth guide rod, a movable block, a fixed-axis abutment structure and a buffer assembly in a bicycle hub production grinding device capable of fixed-axis rotation grinding.

[0024] Figure 6 The invention discloses an exploded view of a movable block, a positioning plate and a buffer assembly in a bicycle hub production grinding device capable of fixed-axis rotation grinding.

[0025] Figure 7 The invention discloses a stereoscopic diagram of a clamping mechanism in a bicycle hub production and grinding device capable of fixed-axis rotation grinding.

[0026] Figure 8 It is a stereoscopic diagram of a clamping assembly and a first control structure in a bicycle hub production grinding device capable of fixed-axis rotation grinding of the present invention.

[0027] Fig. 9 The invention discloses a stereoscopic diagram of a clamping assembly, a guide connection assembly and a horizontal adjustment structure in a bicycle hub production and grinding device capable of fixed-axis rotation grinding.

[0028] Fig.10 It is a stereoscopic diagram of a clamping plate, a positioning block and a buffer connection assembly in a bicycle hub production and grinding device capable of fixed-axis rotation grinding according to the present invention.

[0029] The numbers in the figure are: 1, grinding shaft; 2, grinding cutter head; 3, clamping mechanism; 31, clamping assembly; 311, clamping plate; 312, positioning block; 313, buffer connection assembly; 3131, connecting rod; 3132, second spring; 32, first control structure; 321, guide connection assembly; 3211, first guide rod; 3212, connecting plate; 3213, first moving block; 3214, first spring; 322, driving structure; 3221, second guide rod; 3222, second moving block; 3223, first driving plate; 323, first guiding structure; 3231 , third guide rod; 3232, connecting block; 33, horizontal adjustment structure; 331, second control structure; 332, linkage rod; 4, coaxial positioning mechanism; 41, second guide structure; 411, vertical plate; 412, fourth guide rod; 42, movable block; 43, fixed axis abutment structure; 431, positioning plate; 432, arc positioning block; 433, third control structure; 434, sliding connection assembly; 4341, fifth guide rod; 4342, fixed seat; 4343, third spring; 44, feeding structure; 45, buffer assembly; 451, telescopic rod; 452, fourth spring. DETAILED DESCRIPTION

[0030] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0031] Reference Figures 1 to 10 As shown: a bicycle hub production grinding device capable of fixed-axis rotation grinding, comprising a grinding shaft 1 capable of rotating around its own axis and a grinding cutter head 2 arranged at the end of the grinding shaft 1, and also comprising a clamping mechanism 3 and a coaxial positioning mechanism 4; the clamping mechanism 3 comprises two clamping assemblies 31, the two clamping assemblies 31 are respectively used to clamp the two ends of the hub, and the clamping assembly 31 comprises two clamping plates 311 symmetrically arranged up and down; the coaxial positioning mechanism 4 comprises a second guide structure 41 vertically arranged at one end of the clamped hub, A movable block 42, two fixed-axis abutment structures 43 and a feed structure 44 arranged at the lower end of the second guide structure 41 and capable of pushing the grinding head 2 to move toward the inside of the hub. The movable block 42 is slidably arranged on the second guide structure 41, and the grinding shaft 1 is installed in the middle of the movable block 42. The two fixed-axis abutment structures 43 are respectively arranged on the upper and lower sides of the movable block 42. When the two fixed-axis abutment structures 43 fix the movable block 42 on the second guide structure 41, the two fixed-axis abutment structures 43 both abut against the middle of the hub.

[0032] The clamping assembly 31 can clamp multiple hubs at the same time, and multiple grinding shafts 1 can be provided. Grinding heads 2 are installed at the ends of the multiple grinding shafts 1, and each grinding head 2 corresponds to a hub, so that multiple hubs can be ground at the same time.

[0033] Before placing the hub on the clamping assembly 31, the two clamping plates 311 in the clamping assembly 31 are in a state of separation up and down, forming enough space to accommodate the hub, and the hub is placed on the two clamping plates 311 located at the bottom. The two clamping plates 311 provide two support points for the hub to maintain the stability of the hub. Subsequently, the two clamping plates 311 located at the top move downward at the same time until they are tightly abutted against the hub, ensuring that the hub remains fixed during the grinding process to prevent the hub from rotating. Then the two fixed-axis abutment structures 43 start to operate. First, the fixed-axis abutment structure 43 located at the lower end of the movable block 42 moves toward the hub along the second guide structure 41, and drives the movable block 42 and the grinding shaft 1 to move together. When the fixed-axis abutment structure 43 abuts against the outer wall of the hub, the movement stops. At this time, the grinding shaft 1 The axis is collinear with the axis of the cylinder where the outer wall of the hub is located. Then, the fixed-axis abutment structure 43 located at the upper end of the movable block 42 moves toward the hub along the second guide structure 41 until it abuts against the movable block 42. At this time, the fixed-axis abutment structure 43 applies a downward force to the movable block 42 to ensure that the position of the movable block 42 on the second guide structure 41 is fixed, and the position of the grinding shaft 1 is kept stable. The grinding shaft 1 starts to rotate, and the feed structure 44 drives the grinding shaft 1 to move toward the inside of the hub. Since the axis of the grinding shaft 1 is collinear with the axis of the cylinder where the outer wall of the hub is located, the grinding process can ensure uniform grinding of the inner wall of the hub. After grinding is completed, the axis of the cylinder where the inner wall of the hub is located is collinear with the axis of the cylinder where the outer wall of the hub is located, thereby achieving uniformity in the thickness of the hub wall and improving product quality and consistency.

[0034] Reference Figure 4 and Figure 5 As shown: the fixed axis abutment structure 43 includes a horizontally arranged positioning plate 431, an arc-shaped positioning block 432 and a third control structure 433 capable of controlling the positioning plate 431 to move along the second guide structure 41; one end of the positioning plate 431 is movably connected to the second guide structure 41; the arc-shaped positioning block 432 is arranged at the other end of the positioning plate 431.

[0035] The movable block 42 is slidably arranged on the second guide structure 41. The movable block 42 naturally falls to the top of the positioning plate 431 due to gravity and contacts the positioning plate 431. When the two clamping assemblies 31 complete the clamping of the hub, the fixed-axis abutment structure 43 located below the movable block 42 works first. First, the third control structure 433 in the fixed-axis abutment structure 43 is started to apply a force toward the hub direction to the positioning plate 431. Driven by this force, the positioning plate 431 moves upward along the second guide structure 41, and at the same time drives the movable block 42 and the arc-shaped positioning block 432 to rise synchronously. The arc-shaped positioning block 432 is embedded between the two clamping assemblies 31. Since the distance between the grinding shaft 1 and the positioning plate 431 is fixed, Therefore, when the arc-shaped positioning block 432 gradually rises and abuts against the hub, the axis of the grinding shaft 1 and the axis of the cylinder where the outer wall of the hub is located reach a colinear state, ensuring the accuracy of the grinding process. Then, the third control structure 433 in the fixed-axis abutment structure 43 located above the movable block 42 works to apply a downward force to the positioning plate 431, and this force pushes the positioning plate 431 to move downward along the second guide structure 41. During the movement, the positioning plate 431 drives the arc-shaped positioning block 432 to abut against the outer wall of the hub. At this time, the positioning plate 431 and the movable block 42 are also closely abutted, effectively fixing the position of the movable block 42, thereby enhancing the stability of the grinding shaft 1 during rotation and reducing the deviation caused by vibration.

[0036] Reference Figure 4 and Figure 5 As shown: the fixed axis abutment structure 43 also includes a sliding connection component 434 arranged on one side of the positioning plate 431, and the guiding direction of the sliding connection component 434 is the same as the feeding direction of the feeding structure 44, and the arc-shaped positioning block 432 is installed on the sliding connection component 434.

[0037] Specifically, the sliding connection assembly 434 includes a plurality of fifth guide rods 4341 parallel to the positioning plate 431, both ends of the fifth guide rods 4341 are provided with fixed seats 4342 fixedly connected to the positioning plate 431, the arc-shaped positioning block 432 is slidingly connected to the plurality of fifth guide rods 4341, and the plurality of fifth guide rods 4341 are each sleeved with a third spring 4343, and both ends of the third spring 4343 are respectively in contact with one end of the fifth guide rod 4341 close to the second guide structure 41 and the arc-shaped positioning block 432.

[0038] During operation, when the feeding structure 44 drives the second guide structure 41 to move toward the hub, in order to ensure the stable position of the movable block 42, the arc-shaped positioning block 432 must always maintain close contact with the outer wall of the hub. Since the movement of the second guide structure 41 will drive the positioning plate 431 to translate in the horizontal direction, a sliding connection assembly 434 is provided to connect the arc-shaped positioning block 432 and the positioning plate 431. In the initial state, the third spring 4343 applies a force to the arc-shaped positioning block 432 toward the end of the positioning plate 431, so that the arc-shaped positioning block 432 is stably maintained at the end position of the positioning plate 431. When the second guide structure 41 drives the positioning plate 431 to move, the arc-shaped positioning block 432 is restricted by the clamping assembly 31 and cannot move with the positioning plate 431. Therefore, relative sliding will occur between the fifth guide rod 4341 and the arc-shaped positioning block 432. During this process, the third spring 4343 is further compressed and stores elastic potential energy. After the grinding is completed, the arc-shaped positioning block 432 is separated from the hub. At this time, the third spring 4343 releases the elastic potential energy stored before, and pushes the arc-shaped positioning block 432 to return to the initial position along the fifth guide rod 4341, thereby ensuring that the axis of the grinding shaft 1 and the outer wall of the hub are in line during the grinding process.

[0039] Reference Figure 5 and Figure 6 As shown: both upper and lower ends of the movable block 42 are provided with mounting grooves, and buffer components 45 are arranged in the two mounting grooves, and one end of the buffer component 45 protrudes from the mounting groove. When the fixed axis abutment structure 43 moves toward the movable block 42, the fixed axis abutment structure 43 contacts the buffer component 45.

[0040] Specifically, the buffer assembly 45 includes a telescopic rod 451 and a fourth spring 452 sleeved on the telescopic rod 451 , two ends of the fourth spring 452 are respectively connected to two ends of the telescopic rod 451 , and one end of the telescopic rod 451 extends out of the installation slot under the action of the fourth spring 452 .

[0041] The two positioning plates 431 are in contact with the upper and lower ends of the movable block 42 at the same time, and the moving speed of the positioning plates 431 is effectively slowed down by the buffer assembly 45, thereby avoiding the impact and vibration caused by the rapid contact between the positioning plates 431 and the hub.

[0042] Reference Figure 4 and Figure 5 As shown: the second guide structure 41 includes a vertical plate 411 and at least two fourth guide rods 412; the lower end of the vertical plate 411 is connected to the feeding structure 44; the two fourth guide rods 412 are arranged parallel to each other, and the two fourth guide rods 412 are connected to the vertical plate 411, and the movable block 42 is slidably connected to the two fourth guide rods 412.

[0043] The movable block 42 is slidably connected to at least two fourth guide rods 412, so that the movable block 42 can only generate movement along the axial direction of the fourth guide rods 412, and the positioning plate 431 is also slidably connected to at least two fourth guide rods 412 at the same time, so the positioning plate 431 can maintain vertical translation, and through the guiding effect of the fourth guide rods 412, the movement of the movable block 42 and the positioning plate 431 is effectively restricted, so that the movable block 42 and the positioning plate 431 can only move along the predetermined direction, thereby realizing the accurate docking of the two fixed-axis abutment structures 43 with the hub.

[0044] Reference Figure 3 and Figure 7 As shown: the clamping mechanism 3 also includes two first control structures 32 and a horizontal adjustment structure 33; the two first control structures 32 are respectively arranged at the two ends of the clamping assembly 31, and the first control structure 32 is used to control the two clamping plates 311 in the clamping assembly 31 to approach each other; the horizontal adjustment structure 33 is connected to the two clamping assemblies 31, and the horizontal adjustment structure is used to adjust the distance between the two clamping assemblies 31.

[0045] In the initial state, that is, when the hub is not clamped, the two clamping assemblies 31 abut against each other, and the two clamping plates 311 in each clamping assembly 31 are also in an abutting state. When the hub is ready to be clamped, the two first control structures 32 are started at the same time to drive the two clamping plates 311 in the clamping assembly 31 to separate from each other, forming enough space to accommodate the hub. Subsequently, the hub is placed on the two clamping plates 311 at the lower ends. After placement, the two first control structures 32 are started again at the same time to drive the clamping plates 311 to approach the hub until the hub is tightly clamped. At this time, the clamping plates 311 apply a force toward the middle of the hub to ensure the stability of the hub during the clamping process. Then, the water The horizontal adjustment structure 33 is started to drive the two clamping assemblies 31 to separate from each other, so that enough space is left between the two clamping assemblies 31 to accommodate the arc-shaped positioning block 432. When the two clamping assemblies 31 are completely in contact with the two ends of the hub, the horizontal adjustment structure 33 stops driving to maintain the current position of the clamping assembly 31. At this time, the clamping assembly 31 not only applies a force to the hub toward the plane where its axis is located, but also applies a force to the hub toward its end. The combined force of the two forces constrains the hub in the directions perpendicular to and parallel to its own axis, so that the hub needs to overcome greater friction when rotating, thereby effectively preventing the hub from rotating during the grinding process.

[0046] Reference Figure 7 and Figure 8 As shown: the first control structure 32 includes two guide connection components 321, a driving structure 322 and two first guide structures 323; the two guide connection components 321 are respectively connected to the same clamping plates 311 in the two clamping components 31; the two ends of the driving structure 322 are connected to the two guide connection components 321; the two first guide structures 323 are respectively connected to the two guide connection components 321.

[0047] Specifically, the driving structure 322 includes a second guide rod 3221, on which two second moving blocks 3222 are slidably arranged, and both sides of the second moving block 3222 are axially connected with a first driving plate 3223, and the two first driving plates 3223 are respectively axially connected to two connecting components; the first guide structure 323 includes a third guide rod 3231 and a connecting block 3232, the third guide rod 3231 is perpendicular to the second guide rod 3221, and one end of the third guide rod 3231 is fixedly connected to the middle part of the second guide rod 3221, one end of the connecting block 3232 is slidably connected to the third guide rod 3231, and the other end of the connecting block 3232 is connected to the connecting component.

[0048] When it is necessary to drive the two clamping plates 311 in the clamping assembly 31 to separate, the two second moving blocks 3222 move closer to each other along the second guide rod 3221. During this process, the first driving plates 3223 on both sides of the second moving block 3222 transmit the movement force of the second moving block 3222 to the guide connection assembly 321. Since both ends of the guide connection assembly 321 receive the forces from the two second moving blocks 3222 at the same time, the guide connection assembly 321 moves under the action of the combined force. At the same time, the guide connection assembly 321 drives the connecting block 3232 to move along the third guide rod 3231 during the movement. The cooperation between the connecting block 3232 and the third guide rod 3231 ensures the translation of the guide connection assembly 321 The second movable block 3222 moves away from each other along the second guide rod 3221, and the first driving plate 3223 applies a force in the opposite direction toward the second guide rod 3221 to the connecting assembly. With the cooperation of the third guide rod 3231 and the connecting block 3232, the guiding connecting assembly 321 drives the clamping plate 311 to perform translational movement, so that the two clamping plates 311 can maintain synchronous translation and abut against each other, thereby realizing the smooth and accurate clamping of the hub by the two clamping plates 311.

[0049] Reference Figure 7 and Fig. 9 As shown: the horizontal adjustment structure 33 includes a second control structure 331 and a plurality of linkage rods 332; the two ends of the second control structure 331 are respectively connected to the clamping plates 311 at the same position in the two clamping assemblies 31; the plurality of linkage rods 332 are evenly distributed on the two clamping assemblies 31, and the two ends of the linkage rods 332 are connected to the two clamping plates 311 in the clamping assemblies 31.

[0050] When the linkage rod 332 is fixed, the linkage rod 332 limits the moving direction of the two clamping plates 311, so that the two clamping plates 311 can only move along the axial direction of the linkage rod 332, ensuring that the clamping plates 311 can maintain a high degree of accuracy and stability when clamping the hub, and effectively preventing deviation and shaking during the clamping process. After the clamping assembly 31 clamps the hub, the second control structure 331 starts to work, and the second control structure 331 applies a force to the two clamping assemblies 31, so that the two clamping assemblies 31 move away from each other. In this process, the linkage rod 332 keeps the two clamping plates 311 in the same clamping assembly 31 moving synchronously, ensuring the uniform distribution of the clamping force and the stability of the clamping effect, thereby achieving the application of a force to the hub along its axial direction.

[0051] Reference Figure 8 and Fig. 9As shown: the guide connection assembly 321 includes a first guide rod 3211, a connecting plate 3212, two first moving blocks 3213 slidably arranged on the first guide rod 3211 and two first springs 3214; the two first moving blocks 3213 are connected to the clamping plates 311 at the same position in the two clamping assemblies 31; the two ends of the first spring 3214 are respectively abutted against the end of the first guide rod 3211 and the first moving block 3213.

[0052] During the working process, the guide connection component 321 plays an important role in connecting and guiding the two clamping components 31. When the hub needs to be clamped, the two clamping plates 311 on the guide connection component 321 move toward their respective corresponding clamping plates 311 under the action of the driving structure 322. This movement process is transmitted by the first guide rod 3211 and the two first moving blocks 3213 to achieve synchronous movement of the two clamping plates 311, ensuring the coordination and consistency of the clamping action. After the two clamping components 31 clamp the hub, the horizontal adjustment The structure 33 starts to work, and the horizontal adjustment structure 33 drives the two clamping assemblies 31 to move away from each other. During this process, the two clamping plates 311 drive the two first moving blocks 3213 to move away from each other along the first guide rod 3211, and the two are respectively squeezed by the two first moving blocks 3213, elastically deformed, and energy is stored to provide power for the reset of the first moving blocks 3213, thereby achieving that the guide connection assembly 321 can not only drive the two clamping assemblies 31 to clamp the hub, but also guide the two clamping assemblies 31 to move away from each other.

[0053] Reference Figure 3 and Fig.10 As shown: a positioning block 312 is provided on one side of the clamping plate 311. When the two clamping plates 311 in the clamping assembly 31 clamp the hub, the two positioning blocks 312 abut against each other to form a truncated cone-shaped inner cavity that matches the shape of the hub end. A buffer connection assembly 313 is provided on one side of the positioning block 312. The buffer connection assembly 313 connects the positioning block 312 and the clamping plate 311.

[0054] Specifically, the buffer connection assembly 313 includes a connecting rod 3131 and a second spring 3132, one end of the connecting rod 3131 passes through the clamping plate 311 and is connected to the positioning block 312, the second spring 3132 is sleeved on the connecting rod 3131, and the two ends of the second spring 3132 are respectively connected to the clamping plate 311 and the positioning block 312.

[0055] When the two clamping assemblies 31 start to move away from each other and clamp the hub under the drive of the horizontal adjustment structure 33, one of the clamping assemblies 31 gradually approaches the end of the hub, and once the positioning block 312 on the clamping plate 311 comes into contact with and tightens with the end of the hub, even if the horizontal adjustment structure 33 continues to drive the clamping assembly 31 to move toward the end of the hub, the further movement of the clamping plate 311 will be restricted due to the obstruction of the end of the hub. At this time, the second spring 3132 in the buffer connection assembly 313 begins to be compressed. As the compression amount of the second spring 3132 increases, the resistance of the second spring 3132 to the movement of the clamping plate 311 also increases, thereby effectively slowing down the moving speed of the clamping plate 311 and avoiding a violent collision between the clamping plate 311 and the end of the hub due to rapid movement, thereby protecting the hub and the clamping assembly 31 from damage.

[0056] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A bicycle hub production grinding device capable of fixed-axis rotation grinding, comprising a grinding shaft (1) capable of rotating around its own axis and a grinding cutter head (2) arranged at the end of the grinding shaft (1), characterized in that: It also includes a clamping mechanism (3) and a coaxial positioning mechanism (4); The clamping mechanism (3) comprises two clamping assemblies (31), the two clamping assemblies (31) are respectively used to clamp two ends of the hub, and the clamping assembly (31) comprises two clamping plates (311) symmetrically arranged in an upper and lower manner; The coaxial positioning mechanism (4) comprises a second guide structure (41) vertically arranged at one end of the clamped hub, a movable block (42), two fixed-axis abutment structures (43), and a feeding structure (44) arranged at the lower end of the second guide structure (41) and capable of pushing the grinding head (2) to move toward the hub. The movable block (42) is slidably arranged on the second guide structure (41), the grinding shaft (1) is mounted in the middle of the movable block (42), and the two fixed-axis abutment structures (43) are respectively arranged on the upper and lower sides of the movable block (42). When the two fixed-axis abutment structures (43) fix the movable block (42) on the second guide structure (41), the two fixed-axis abutment structures (43) both abut against the middle of the hub.

2. A bicycle hub production grinding device capable of fixed-axis rotation grinding according to claim 1, characterized in that: The fixed-axis abutment structure (43) comprises a horizontally arranged positioning plate (431), an arc-shaped positioning block (432), and a third control structure (433) capable of controlling the positioning plate (431) to move along the second guide structure (41); One end of the positioning plate (431) is movably connected to the second guide structure (41); The arc-shaped positioning block (432) is arranged at the other end of the positioning plate (431).

3. A bicycle hub production grinding device capable of fixed-axis rotation grinding according to claim 2, characterized in that: The fixed axis abutment structure (43) further comprises a sliding connection assembly (434) arranged on one side of the positioning plate (431), wherein the guiding direction of the sliding connection assembly (434) is the same as the feeding direction of the feeding structure (44), and the arc-shaped positioning block (432) is mounted on the sliding connection assembly (434).

4. A bicycle hub production grinding device capable of fixed-axis rotation grinding according to claim 1, characterized in that: The movable block (42) is provided with mounting grooves at both upper and lower ends, and buffer components (45) are provided in both mounting grooves, and one end of the buffer component (45) protrudes from the mounting groove. When the fixed-axis abutment structure (43) moves toward the movable block (42), the fixed-axis abutment structure (43) and the buffer component (45) first contact.

5. The bicycle hub production grinding device capable of fixed-axis rotation grinding according to claim 1, characterized in that: The second guide structure (41) comprises a vertical plate (411) and at least two fourth guide rods (412); The lower end of the vertical plate (411) is connected to the feeding structure (44); The two fourth guide rods (412) are arranged parallel to each other, and the two fourth guide rods (412) are connected to the vertical plate (411), and the movable block (42) is slidably connected to the two fourth guide rods (412).

6. A bicycle hub production grinding device capable of fixed-axis rotation grinding according to claim 1, characterized in that: The clamping mechanism (3) further comprises two first control structures (32) and a horizontal adjustment structure (33); Two first control structures (32) are respectively arranged at two ends of the clamping assembly (31), and the first control structures (32) are used to control two clamping plates (311) in the clamping assembly (31) to approach each other; The horizontal adjustment structure (33) is connected to the two clamping assemblies (31), and the horizontal adjustment structure is used to adjust the distance between the two clamping assemblies (31).

7. A bicycle hub production grinding device capable of fixed-axis rotation grinding according to claim 6, characterized in that: The first control structure (32) comprises two guide connection components (321), a drive structure (322) and two first guide structures (323); The two guide connection assemblies (321) are respectively connected to the same clamping plates (311) in the two clamping assemblies (31); Two ends of the driving structure (322) are connected to two guide connection components (321); The two first guide structures (323) are respectively connected to the two guide connection components (321).

8. The bicycle hub production grinding device capable of fixed-axis rotation grinding according to claim 6, characterized in that: The horizontal adjustment structure (33) comprises a second control structure (331) and a plurality of linkage rods (332); Two ends of the second control structure (331) are respectively connected to the clamping plates (311) at the same position in the two clamping assemblies (31); A plurality of linkage rods (332) are evenly distributed on the two clamping assemblies (31), and two ends of the linkage rods (332) are connected to two clamping plates (311) in the clamping assemblies (31).

9. The bicycle hub production grinding device capable of fixed-axis rotation grinding according to claim 7, characterized in that: The guide connection assembly (321) comprises a first guide rod (3211), a connection plate (3212), two first moving blocks (3213) slidably arranged on the first guide rod (3211), and two first springs (3214); The two first moving blocks (3213) are connected to the clamping plates (311) at the same position in the two clamping assemblies (31); Both ends of the first spring (3214) are respectively in contact with the end of the first guide rod (3211) and the first moving block (3213).

10. The bicycle hub production grinding device capable of fixed-axis rotation grinding according to claim 1, characterized in that: A positioning block (312) is provided on one side of the clamping plate (311); when the two clamping plates (311) in the clamping assembly (31) clamp the hub, the two positioning blocks (312) abut against each other to form a truncated cone-shaped inner cavity that matches the shape of the hub end; a buffer connection assembly (313) is provided on one side of the positioning block (312); the buffer connection assembly (313) connects the positioning block (312) and the clamping plate (311).

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