A reamer capable of quickly replacing a cutter head

Abstract

The present invention relates to the technical field of mechanical processing tools, and discloses a reamer with a quickly replaceable cutter head, comprising a reamer rod and a reamer head, and also comprising a positioning assembly arranged inside the reamer rod, and a locking mechanism arranged on the positioning assembly to fix and lock the reamer head; a mounting handle is arranged on the top of the reamer head, and a plurality of positioning grooves and locking grooves are symmetrically provided on the mounting handle. The reamer with a quickly replaceable cutter head can, through this arrangement, automatically lock and assemble the reamer head, greatly improving the flexibility and convenience of operation, and can ensure the tightness and stability of the connection between the reamer rod and the reamer head, effectively preventing the cutter head from loosening or falling off due to vibration or impact during the operation of the reamer head, thereby ensuring the processing accuracy and operation safety, and improving the overall work quality and reliability. In addition, the present application can disassemble and replace the reamer head separately, and only replace the worn parts, greatly reducing the maintenance cost.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing tools, and in particular relates to a reamer with a quickly replaceable tool head. Background Art

[0002] A reamer is a rotary tool with one or more teeth used to remove a thin layer of metal from the surface of a machined hole. It is a rotary finishing tool with a straight or spiral edge, mainly used for expanding or repairing holes. Since the reamer finishes the inner surface of the formed hole, the cutting amount is small and the machining accuracy requirements are usually higher than those of a drill.

[0003] At present, traditional reamer designs generally adopt an integrated structure, that is, the arbor and the cutter head are directly solidified into an integrated structure. Although this design ensures the rigidity and stability during the reaming process to a certain extent, it also brings significant limitations and inconveniences. Specifically, due to the lack of a detachable connection mechanism between the arbor and the cutter head, once the cutter head is damaged by wear, breakage, etc. due to long-term use or encountering abnormal working conditions, the user is often faced with the dilemma of having to replace the entire reamer assembly. Due to the limitations of the overall structure, the user cannot replace the damaged cutter head part alone, which not only increases material consumption and cost burden, but also prolongs equipment downtime, and has an adverse effect on production efficiency. Secondly, overall replacement means that recalibration and adjustment are required, which further increases the difficulty and time cost of operation; therefore, there are deficiencies and cannot meet the user's usage needs. Therefore, further improvement is necessary.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a reamer with a quick-replaceable cutter head is provided, in order to achieve a more practical purpose. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a reamer with a quick-change cutter head, which is achieved by the following specific technical means:

[0006] A reamer with a quickly replaceable cutter head comprises a reamer rod and a reamer head, a positioning assembly arranged inside the reamer rod, and a locking mechanism arranged on the positioning assembly for fixing and locking the reamer head;

[0007] A mounting handle is provided on the top of the reamer head, and a plurality of positioning grooves and locking grooves are symmetrically provided on the mounting handle, and the locking grooves are located in the positioning grooves;

[0008] The positioning assembly comprises a positioning sleeve fixedly mounted inside the reamer rod, an elastic pad is fixedly mounted on the inner top wall of the positioning sleeve, a positioning seat matched with the mounting handle is fixedly mounted on the bottom of the elastic pad, and a plurality of fixed oblique blocks are symmetrically mounted on the inner wall of the positioning sleeve;

[0009] The locking mechanism includes a locking block, the upper side of which is slidably mounted with the positioning seat by means of a connecting assembly, a movable inclined block is fixedly mounted on the outer side of the locking block, an inner cavity is provided inside the locking block, and a fixed block is fixedly assembled in the inner cavity, locking assemblies are movably arranged on the upper and lower sides of the fixed block, and the locking assembly is at least partially located on the outer side of the locking block, and when the positioning seat is pushed upward by the mounting handle, the movable inclined block contacts and slides with the fixed inclined block, driving the locking block to be inserted into the positioning groove and the locking assembly to be inserted into the locking groove to complete the double locking assembly of the reamer head.

[0010] As a further description of the above technical solution: the locking block is inserted into the positioning groove to firmly clamp and fix it, thereby achieving fixed assembly of the mounting handle and the reamer head, and the locking plug is inserted into the locking groove at the same time, thereby achieving double locking of the mounting handle and the reamer head. This arrangement can, on the one hand, automatically lock and assemble the reamer head, greatly improving the flexibility and convenience of operation, and on the other hand, can ensure the tightness and stability of the connection between the reamer rod and the reamer head, effectively preventing the loosening or falling off of the cutter head due to vibration or impact during the operation of the reamer head, thereby ensuring processing accuracy and operation safety, and improving the overall work quality and reliability.

[0011] Furthermore, the locking assembly includes a locking plug slidably assembled on the locking block, one end of the locking plug facing the cavity in the locking block is fixedly connected to the limit plate, and a support spring is fixedly connected between the limit plate and the fixed block.

[0012] As a further description of the above technical solution: the installation handle and the reamer head can be further locked by setting the locking plug and the support spring. At the same time, the position of the locking plug can be moved and limited by setting the limit plate, thereby further improving its practicality.

[0013] Furthermore, an inclined surface is provided at one end of the locking plug away from the limiting plate, and the inclined surface just protrudes out of the outside of the locking block and faces the installation handle;

[0014] Wherein, the size of the outer portion of the locking plug block protruding from the locking block is consistent with the size of the locking groove.

[0015] As a further description of the above technical solution: through the elastic force of the supporting spring, the locking plug is pushed to be inserted into the locking groove, thereby further realizing double locking of the mounting handle and the reamer head, thereby ensuring the tightness and stability of the connection between the reamer rod and the reamer head, and effectively preventing the loosening or falling off of the cutter head due to vibration or impact during the operation of the reamer head, thereby ensuring processing accuracy and operation safety, and improving the overall work quality and reliability.

[0016] Furthermore, the connecting assembly includes a fixing rod fixedly assembled on the top of the locking block, and a sliding block is fixedly installed on the top of the fixing rod, wherein a sliding groove is provided on the positioning seat, and the sliding block is located in the sliding groove, and a groove is provided in the sliding block, and a connecting spring is provided in the groove, and the end of the connecting spring away from the sliding block is connected to the inner wall of the sliding groove.

[0017] As a further description of the above technical solution: the movement of the locking block can be limited by the setting of the fixed rod, the sliding block and the connecting spring, and the locking block can be automatically reset by the setting of the connecting spring, further improving its applicability.

[0018] Furthermore, an open slot is provided on one side of the locking block, and a movable magnet plate is arranged in the open slot, and a pull rope is fixedly connected between the movable magnet plate and the limiting plate.

[0019] As a further description of the above technical solution: through this arrangement, while the movable magnet plate is moving, the locking plug can be pulled by the pull rope to move synchronously, thereby achieving the purpose of separating the locking plug and the locking groove from each other.

[0020] Furthermore, a limiting groove is provided on the inner wall of the positioning sleeve, and a plurality of limiting components are symmetrically installed on the outer wall of the positioning seat. The limiting component includes a limiting slider slidably installed in the limiting groove, and the limiting slider is fixedly connected to the positioning seat via a limiting rod.

[0021] As a further description of the above technical solution: in the process of driving the positioning seat to move up and down by the installation handle, the limiting rod is used to drive the limiting slider to slide in the limiting slide groove, thereby achieving the purpose of limiting the movement of the positioning seat and further improving its applicability.

[0022] Further, the reamer rod is provided with a disassembly assembly, the disassembly assembly includes a movable sleeve rotatably sleeved on the outer periphery of the reamer rod, a connecting rod is fixedly installed on the inner wall of the movable sleeve, a movable magnet block is fixedly installed on one end of the connecting rod away from the movable sleeve, and the movable magnet block is located inside the reamer rod, and a plurality of anti-slip grooves are opened on the outer periphery of the movable sleeve;

[0023] Wherein, a movable groove is provided on the reamer rod, and the connecting rod is located in the movable groove.

[0024] As a further description of the above technical solution: when the damaged reamer head needs to be disassembled, the position of the movable magnet block is changed by rotating the movable sleeve, and it is placed in a relative position with the movable magnet plate in the locking block, thereby separating the locking block from the positioning groove and completing the unlocking of the mounting handle.

[0025] Furthermore, a limiting clamping strip is fixedly provided on the inner wall of the movable sleeve, a clamping groove matching the limiting clamping strip is opened on the outer wall of the reamer rod, and the limiting clamping strip is located in the clamping groove on the outer wall of the reamer rod.

[0026] As a further description of the above technical solution: by providing a slot matching the limit strip on the outer wall of the reamer rod, the stable rotation of the movable sleeve can be effectively guaranteed, further improving its practicality.

[0027] Furthermore, the surfaces of the movable magnet block and the movable magnet plate opposite to each other have opposite magnetic properties, and there is an attractive magnetic field force between the movable magnet block and the movable magnet plate.

[0028] As a further description of the above technical solution: since the opposite sides of the movable magnet block and the movable magnet plate have opposite magnetic properties, the magnetic force of attraction between the movable magnet block and the movable magnet plate prompts the movable magnet plate to move toward the movable magnet block, thereby separating the locking block from the positioning groove and completing the unlocking of the mounting handle.

[0029] Furthermore, a groove is provided at the bottom of the reamer rod, and a magnet ring for magnetically attracting the reamer head is arranged in the groove, wherein the reamer head is configured to be made of a metal material that is magnetically attracted to the magnet ring.

[0030] As a further description of the above technical solution: when the reamer head needs to be installed, the mounting handle above the reamer head is inserted into the opening at the bottom of the reamer rod, and based on the suction effect of the magnet ring on the reamer head, it automatically moves upward to achieve the purpose of automatic adsorption and upward movement. At the same time, the magnet ring can be used to firmly adsorb and fix the reamer head, further improving its stability during installation.

[0031] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0032] 1. The reamer with a quickly replaceable cutter head, through the cooperation between the reamer rod, the reamer head, the positioning assembly and the locking mechanism, firmly clamps and fixes the reamer head by inserting the locking block into the positioning groove, thereby realizing fixed assembly of the mounting handle and the reamer head, and at the same time, the locking plug is inserted into the locking groove, thereby realizing double locking of the mounting handle and the reamer head. Through this arrangement, on the one hand, the reamer head can be automatically locked and assembled, which greatly improves the flexibility and convenience of operation, and on the other hand, it can ensure the tightness and stability when the reamer rod is connected to the reamer head, effectively preventing the cutter head from loosening or falling off due to vibration or impact during the operation of the reamer head, thereby ensuring the processing accuracy and operation safety, and improving the overall work quality and reliability. In addition, the present application can disassemble and replace the reamer head separately, and only replaces the worn parts, which greatly reduces the maintenance cost, and at the same time solves the problem that the traditional cutter head cannot be replaced due to damage such as wear and breakage due to abnormal working conditions.

[0033] 2. The reamer with a quickly replaceable cutter head, through the cooperation between the reamer rod, the reamer head, the positioning assembly, the locking mechanism, the limit assembly and the disassembly assembly, based on the magnetic force of the movable magnet block and the movable magnet plate attracted to each other, prompting the movable magnet plate to use a pull rope to pull the locking plug and the locking groove to separate from each other, and at the same time, based on the elastic force of the connecting spring, the locking block is reset, prompting the locking block to separate from the positioning groove, thereby completing the unlocking of the mounting handle, and achieving the purpose of disassembling and replacing the reamer head. Through this setting, the replacement operation can be quickly completed without complex tools or professional skills, which greatly improves the flexibility and convenience of operation, while simplifying the maintenance process and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0035] Figure 1 It shows a schematic diagram of the overall structure provided by an embodiment of the present invention;

[0036] Figure 2 A schematic diagram of the unfolded structure of a reamer rod and a reamer head provided in an embodiment of the present invention is shown;

[0037] Figure 3 A schematic diagram of the internal structure of a reamer rod according to an embodiment of the present invention is shown;

[0038] Figure 4 A schematic diagram of a local structure of a positioning component provided according to an embodiment of the present invention is shown;

[0039] Figure 5 The schematic diagram of the locking mechanism and the mounting handle installation structure provided by the embodiment of the present invention is shown. Figure 1 ;

[0040] Figure 6 The schematic diagram of the locking mechanism and the mounting handle installation structure provided by the embodiment of the present invention is shown. Figure 2 ;

[0041] Figure 7 It shows a schematic diagram of the overall structure of a locking mechanism provided according to an embodiment of the present invention;

[0042] Figure 8 A partial structural schematic diagram of a locking mechanism provided according to an embodiment of the present invention is shown;

[0043] Fig. 9 The embodiment of the present invention provides Figure 5 The enlarged schematic diagram of part A in the middle;

[0044] Fig.10 The embodiment of the present invention provides Figure 5 The enlarged schematic diagram of part B in the middle;

[0045] Fig.11 A schematic diagram of the installation structure of a reamer rod and a disassembly assembly according to an embodiment of the present invention is shown;

[0046] Fig.12 A schematic diagram of the overall structure of a disassembly assembly provided according to an embodiment of the present invention is shown.

[0047] Legend:

[0048] 10. reamer rod; 101. movable slot; 11. magnet ring;

[0049] 20. Reamer head; 21. Mounting handle; 22. Positioning groove; 23. Locking groove;

[0050] 30. Positioning assembly; 31. Positioning sleeve; 311. Limiting slide groove; 32. Elastic pad; 33. Positioning seat; 331. Sliding groove; 34. Fixed inclined block;

[0051] 40. Locking mechanism; 41. Locking block; 411. Opening slot; 42. Active inclined block; 43. Connecting assembly; 431. Fixed rod; 432. Sliding block; 433. Connecting spring; 44. Fixed block; 45. Locking assembly; 451. Locking plug; 452. Limiting plate; 453. Support spring; 46. Active magnet plate; 461. Pull rope;

[0052] 50. Limiting assembly; 51. Limiting slider; 52. Limiting rod;

[0053] 60. Disassembly assembly; 61. Movable sleeve; 62. Connecting rod; 63. Movable magnet block; 64. Limiting strip; 65. Anti-slip groove. DETAILED DESCRIPTION

[0054] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0055] See also Figures 1 to 12 A reamer with a quickly replaceable cutter head comprises a reamer rod 10 and a reamer head 20, a positioning assembly 30 arranged inside the reamer rod 10, and a locking mechanism 40 arranged on the positioning assembly 30 for fixing and locking the reamer head 20; a mounting handle 21 is arranged on the top of the reamer head 20, and a plurality of positioning grooves 22 and locking grooves 23 are symmetrically opened on the mounting handle 21, and the locking grooves 23 are located in the positioning grooves 22; the positioning assembly 30 comprises a positioning sleeve 31 fixedly assembled inside the reamer rod 10, and the positioning sleeve 31 The inner top wall of the locking mechanism 40 is fixedly installed with an elastic pad 32, and the bottom of the elastic pad 32 is fixedly installed with a positioning seat 33 that cooperates with the mounting handle 21. A plurality of fixed oblique blocks 34 are symmetrically installed on the inner wall of the positioning sleeve 31; the locking mechanism 40 includes a locking block 41, the upper side of the locking block 41 is slidably installed with the positioning seat 33 by using a connecting component 43, and a movable oblique block 42 is fixedly installed on the outer side of the locking block 41. An inner cavity is opened inside the locking block 41, and a fixed block 44 is fixedly installed in the inner cavity. The upper and lower sides of the fixed block 44 are A locking assembly 45 is movably provided, and the locking assembly 45 is at least partially located on the outside of the locking block 41. When the positioning seat 33 is pushed upward by the mounting handle 21, the movable inclined block 42 contacts and slides with the fixed inclined block 34, driving the locking block 41 to be inserted into the positioning groove 22 and the locking assembly 45 to be inserted into the locking groove 23 to complete the double locking assembly of the reamer head 20; the locking block 41 is inserted into the positioning groove 22 to firmly clamp and fix it, thereby realizing the fixed assembly of the mounting handle 21 and the reamer head 20, and at the same time utilizing the locking The insert block 451 is inserted into the locking groove 23, thereby realizing double locking of the mounting handle 21 and the reamer head 20. This arrangement can, on the one hand, automatically lock and assemble the reamer head 20, greatly improving the flexibility and convenience of operation. On the other hand, it can ensure the tightness and stability of the connection between the reamer rod 10 and the reamer head 20, effectively preventing the loosening or falling off of the cutter head due to vibration or impact during the operation of the reamer head 20, thereby ensuring processing accuracy and operation safety, and improving the overall work quality and reliability.

[0056] See also Figure 3A groove is provided at the bottom of the reamer rod 10, and a magnet ring 11 is provided in the groove for magnetically attracting the reamer head 20, wherein the reamer head 20 is configured to be a metal material that is magnetically attracted to the magnet ring 11; when the reamer head 20 needs to be installed, the mounting handle 21 above the reamer head 20 is aligned with the opening at the bottom of the reamer rod 10 and inserted, and at the same time, based on the suction force of the magnet ring 11 on the reamer head 20, the reamer head 20 is automatically moved upward, thereby achieving the purpose of automatic adsorption and upward movement, and at the same time, the magnet ring 11 can be used to firmly adsorb and fix the reamer head 20, thereby further improving its stability during installation.

[0057] See also Figures 5 to 10 A limiting groove 311 is provided on the inner wall of the positioning sleeve 31, and a plurality of limiting components 50 are symmetrically installed on the outer wall of the positioning seat 33. The limiting component 50 includes a limiting slider 51 slidably installed in the limiting groove 311, and the limiting slider 51 is fixedly connected to the positioning seat 33 through a limiting rod 52; in the process of driving the positioning seat 33 to move up and down by the mounting handle 21, the limiting rod 52 is used to drive the limiting slider 51 to slide in the limiting groove 311, thereby achieving the purpose of limiting the movement of the positioning seat 33.

[0058] See also Figures 7 and 8 The locking assembly 45 includes a locking plug 451 slidably assembled on the locking block 41, and one end of the locking plug 451 facing the cavity in the locking block 41 is fixedly connected to the limit plate 452, and a support spring 453 is fixedly connected between the limit plate 452 and the fixed block 44; the installation handle 21 and the reamer head 20 can be further locked by the setting of the locking plug 451 and the support spring 453, and the position of the locking plug 451 can be moved and limited by the setting of the limit plate 452.

[0059] See also Figures 4 to 8 The locking plug 451 is provided with an inclined surface at one end away from the limit plate 452, and the inclined surface just protrudes out of the outside of the locking block 41 and faces the mounting handle 21; wherein, the size of the outer portion of the locking plug 451 protruding from the locking block 41 is consistent with the size of the locking groove 23; through the elastic force of the supporting spring 453, the locking plug 451 is pushed to be inserted into the locking groove 23, further realizing the double locking of the mounting handle 21 and the reamer head 20, thereby ensuring the tightness and stability of the connection between the reamer rod 10 and the reamer head 20, and effectively preventing the loosening or falling off of the cutter head due to vibration or impact during the operation of the reamer head 20, thereby ensuring the processing accuracy and operation safety, and improving the overall work quality and reliability.

[0060] See also Figures 5 to 9The connecting component 43 includes a fixing rod 431 fixedly assembled on the top of the locking block 41, and a sliding block 432 is fixedly installed on the top of the fixing rod 431, wherein a sliding groove 331 is provided on the positioning seat 33, and the sliding block 432 is located in the sliding groove 331, and a groove is provided in the sliding block 432, and a connecting spring 433 is provided in the groove, and the end of the connecting spring 433 away from the sliding block 432 is connected to the inner wall of the sliding groove 331; the movement of the locking block 41 can be limited by the setting of the fixing rod 431, the sliding block 432 and the connecting spring 433, and the locking block 41 can be automatically reset by the setting of the connecting spring 433.

[0061] See also Figure 8 An open groove 411 is provided on one side of the locking block 41, and an active magnet plate 46 is provided in the open groove 411, and a pull rope 461 is fixedly connected between the active magnet plate 46 and the limiting plate 452; through this arrangement, when the active magnet plate 46 moves, the pull rope 461 can be used to pull the locking plug 451 to move synchronously, thereby achieving the purpose of separating the locking plug 451 and the locking groove 23 from each other.

[0062] See also Figures 1 to 3 , Figure 11 to Figure 12 A disassembly assembly 60 is provided on the reamer rod 10, and the disassembly assembly 60 includes an active sleeve 61 rotatably sleeved on the outer periphery of the reamer rod 10, a connecting rod 62 is fixedly installed on the inner wall of the active sleeve 61, and a movable magnet block 63 is fixedly installed on the end of the connecting rod 62 away from the movable sleeve 61, and the movable magnet block 63 is located inside the reamer rod 10, and a plurality of anti-slip grooves 65 are provided on the outer periphery of the movable sleeve 61; wherein, a movable groove 101 is provided on the reamer rod 10, and the connecting rod 62 is located in the movable groove 101; when the damaged reamer head 20 needs to be disassembled, by rotating the active sleeve 61 on the outer periphery of the reamer rod 10, the movable magnet block 63 is driven to rotate synchronously by the active sleeve 61, so that the position of the movable magnet block 63 is changed, and it is in a relative position with the movable magnet plate 46 in the locking block 41, thereby realizing the separation of the locking block 41 from the positioning groove 22, and completing the unlocking of the mounting handle 21.

[0063] See also Figure 11 to Figure 12 A limit strip 64 is fixedly provided on the inner wall of the movable sleeve 61, and a groove matching the limit strip 64 is opened on the outer wall of the reamer rod 10, and the limit strip 64 is located in the groove on the outer wall of the reamer rod 10; by opening a groove matching the limit strip 64 on the outer wall of the reamer rod 10, the stable rotation of the movable sleeve 61 can be effectively guaranteed.

[0064] See also Figures 8 to 12, the side of the movable magnet block 63 opposite to the movable magnet plate 46 has opposite magnetism, and there is an attractive magnetic field force between the movable magnet block 63 and the movable magnet plate 46; since the side of the movable magnet block 63 opposite to the movable magnet plate 46 has opposite magnetism, at this time, based on the magnetic force of attraction between the movable magnet block 63 and the movable magnet plate 46, the movable magnet plate 46 is prompted to move toward the movable magnet block 63, thereby separating the locking block 41 from the positioning groove 22, and completing the unlocking of the mounting handle 21.

[0065] The specific usage and function of this embodiment are as follows:

[0066] Working principle: When in use, the mounting handle 21 above the reamer head 20 is inserted into the opening at the bottom of the reamer rod 10 and combined with the positioning seat 33. At the same time, based on the suction effect of the magnet ring 11 on the reamer head 20, it automatically moves upward. Under the force of the upward movement of the reamer head 20, the mounting handle 21 is used to drive the positioning seat 33 to move upward synchronously, and the elastic pad 32 is squeezed. When the positioning seat 33 moves upward, it drives the locking mechanism 40 to move synchronously, and the upward moving movable bevel block 42 contacts the fixed bevel block 34. Based on the force when the movable bevel block 42 contacts the fixed bevel block 34, the locking block 41 is pushed toward the positioning groove 22 on the mounting handle 21. At the same time, the locking plug 451 contacts the mounting handle 21. Based on the mounting handle The force of contacting the locking plug 451 with the locking plug 451 presses the locking plug 451 downward, and when the reamer rod 10 and the reamer head 20 are close to each other, the locking block 41 is just located in the positioning groove 22 and firmly clamps and fixes it, thereby realizing the fixed assembly of the mounting handle 21 and the reamer head 20. At the same time, based on the elastic force of the supporting spring 453, the locking plug 451 is pushed to be inserted into the locking groove 23, further realizing the double locking of the mounting handle 21 and the reamer head 20, thereby ensuring the tightness and stability of the connection between the reamer rod 10 and the reamer head 20, and effectively preventing the loosening or falling off of the cutter head due to vibration or impact during the operation of the reamer head 20, thereby ensuring the processing accuracy and operation safety, and improving the overall work quality and reliability;

[0067] In addition, when the damaged reamer head 20 needs to be disassembled, the reamer head 20 is pulled downward. Since the mounting handle 21 and the locking mechanism 40 are in a locked state at this time, the positioning seat 33 is driven to move downward synchronously. When the positioning seat 33 moves downward, the limiting rod 52 is used to drive the limiting slide block 51 to slide synchronously in the limiting slide groove 311, and when the limiting slide block 51 moves to the lowest point, the locking mechanism 40 and the disassembly assembly 60 are in parallel positions. At the same time, by rotating the movable sleeve 61 on the outer periphery of the reamer rod 10, the movable sleeve 61 is used to drive the movable magnet block 63 to rotate synchronously, so as to change the position of the movable magnet block 63 and make it relative to the movable magnet plate 46 in the locking block 41. Since the movable magnet block 63 and the movable magnet plate 46 are in a relative position, The opposite side of 46 presents opposite magnetism. At this time, the magnetic force based on the attraction between the movable magnet block 63 and the movable magnet plate 46 causes the movable magnet plate 46 to move toward the movable magnet block 63, and while the movable magnet plate 46 moves, the pull rope 461 is used to pull the locking plug 451 to move synchronously, causing the locking plug 451 and the locking groove 23 to separate from each other. At the same time, based on the elastic force of the connecting spring 433, the fixing rod 431 is used to drive the locking block 41 to reset, causing the locking block 41 to separate from the positioning groove 22, thereby completing the unlocking of the mounting handle 21 and achieving the purpose of disassembling and replacing the reamer head 20. Moreover, through this setting, the replacement operation can be quickly completed without complex tools or professional skills, which greatly improves the flexibility and convenience of operation.

[0068] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A reamer with a quickly replaceable cutter head, comprising a reamer rod (10) and a reamer head (20), characterized in that: It also includes a positioning assembly (30) disposed inside the reamer rod (10), and a locking mechanism (40) disposed on the positioning assembly (30) for fixing and locking the reamer head (20); A mounting handle (21) is provided at the top of the reamer head (20), and a plurality of positioning grooves (22) and locking grooves (23) are symmetrically provided on the mounting handle (21), and the locking grooves (23) are located inside the positioning grooves (22); The positioning assembly (30) comprises a positioning sleeve (31) fixedly mounted inside the reamer rod (10), an elastic pad (32) fixedly mounted on the inner top wall of the positioning sleeve (31), a positioning seat (33) matched with the mounting handle (21) fixedly mounted on the bottom of the elastic pad (32), and a plurality of fixed inclined blocks (34) symmetrically mounted on the inner wall of the positioning sleeve (31); The locking mechanism (40) comprises a locking block (41), the upper side of which is slidably mounted with the positioning seat (33) by means of a connecting assembly (43), a movable inclined block (42) is fixedly mounted on the outer side of the locking block (41), an inner cavity is provided inside the locking block (41), and a fixed block (44) is fixedly mounted in the inner cavity, locking assemblies (45) are movably mounted on both upper and lower sides of the fixed block (44), and the locking assemblies (45) are at least partially located on the outer side of the locking block (41), and when the positioning seat (33) is pushed upward by the mounting handle (21), the movable inclined block (42) contacts and slides with the fixed inclined block (34), driving the locking block (41) to be inserted into the positioning groove (22) and the locking assembly (45) to be inserted into the locking groove (23), thereby completing the double locking assembly of the reamer head (20); The locking assembly (45) comprises a locking plug block (451) slidably mounted on the locking block (41); one end of the locking plug block (451) facing the inner cavity of the locking block (41) is fixedly connected to a limit plate (452); a support spring (453) is fixedly connected between the limit plate (452) and the fixed block (44); An end of the locking plug block (451) away from the limiting plate (452) is provided with an inclined surface, and the inclined surface just protrudes out of the outside of the locking block (41) and faces the installation handle (21); The size of the outer portion of the locking plug block (451) protruding from the locking block (41) is consistent with the size of the locking groove (23); The connecting assembly (43) comprises a fixing rod (431) fixedly assembled on the top of the locking block (41), and a sliding block (432) is fixedly installed on the top of the fixing rod (431), wherein a sliding groove (331) is provided on the positioning seat (33), and the sliding block (432) is located in the sliding groove (331), and a groove is provided in the sliding block (432), and a connecting spring (433) is provided in the groove, and one end of the connecting spring (433) away from the sliding block (432) is connected to the inner wall of the sliding groove (331); An opening slot (411) is provided on one side of the locking block (41), and a movable magnet plate (46) is arranged in the opening slot (411), and a pull rope (461) is fixedly connected between the movable magnet plate (46) and the limiting plate (452); A limiting slide groove (311) is provided on the inner wall of the positioning sleeve (31), and a plurality of limiting components (50) are symmetrically mounted on the outer wall of the positioning seat (33). The limiting components (50) include a limiting slider (51) slidably mounted in the limiting slide groove (311), and the limiting slider (51) is fixedly connected to the positioning seat (33) via a limiting rod (52); The reamer rod (10) is provided with a disassembly assembly (60), the disassembly assembly (60) comprising a movable sleeve (61) rotatably sleeved on the outer periphery of the reamer rod (10), a connecting rod (62) fixedly mounted on the inner wall of the movable sleeve (61), a movable magnet block (63) fixedly mounted on one end of the connecting rod (62) away from the movable sleeve (61), and the movable magnet block (63) is located inside the reamer rod (10), and a plurality of anti-slip grooves (65) are provided on the outer periphery of the movable sleeve (61); Wherein, a movable groove (101) is provided on the reamer rod (10), and the connecting rod (62) is located in the movable groove (101).

2. A reamer with a quickly replaceable cutter head according to claim 1, characterized in that: A limit clamping strip (64) is fixedly provided on the inner wall of the movable sleeve (61), a clamping groove matching the limit clamping strip (64) is provided on the outer wall of the reamer rod (10), and the limit clamping strip (64) is located in the clamping groove on the outer wall of the reamer rod (10).

3. A reamer with a quickly replaceable cutter head according to claim 1, characterized in that: The surfaces of the movable magnet block (63) and the movable magnet plate (46) opposite to each other have opposite magnetic properties, and there is an attractive magnetic field force between the movable magnet block (63) and the movable magnet plate (46).

4. A reamer with a quickly replaceable cutter head according to claim 1, characterized in that: The bottom of the reamer rod (10) is provided with a groove, and a magnet ring (11) for magnetically attracting the reamer head (20) is arranged in the groove, wherein the reamer head (20) is made of a metal material that is magnetically attracted to the magnet ring (11).

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