Reamer with adjustable outer diameter

Abstract

The reamer comprises a sleeve and a fixing rod, a positioning cavity is formed in the sleeve, a reamer head is fixedly connected to the front end of the fixing rod, guide blocks are fixedly connected to the two sides of the outer wall of the fixing rod, guide grooves matched with the guide blocks are formed in the two sides of the inner wall of the sleeve, and the guide blocks are fixedly connected to the guide grooves. The rear end of the fixing rod is inserted into the positioning cavity, two positioning pins moving oppositely are further arranged in the sleeve, positioning holes are formed in the two sides of the outer wall of the fixing rod and located at the rear end of the guide block, and the positioning pins are matched with the positioning holes. By means of the structure, the rotary knob is rotated to drive the bidirectional threaded rod to rotate, then the two threaded blocks and the two connecting rods are driven to move in the opposite directions, the two positioning pins can be driven to move in the opposite directions and are inserted into the positioning pins of the fixing rods, positioning is completed, falling is avoided, the guide blocks are inserted along the guide grooves, and the positioning effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of reamer, in particular to a reamer with adjustable outer diameter. Background Art

[0002] Reaming is one of the finishing methods for holes. It is widely used in production. For smaller holes or for parts with particularly high requirements, such as when the tolerance is only 2-3um, compared with internal grinding and fine boring, reaming is a more economical and practical processing method, and it can meet the precision requirements. In the finishing process of the hole system, a twist drill is generally used for drilling first, and then a reamer is used to control the machining allowance of the hole within the machining allowance range of the reamer, which is generally 0.2-0.3mm. Finally, a reamer is used for the final micro-cutting to achieve the required design size. Reamers have been widely used as finishing tools for hole systems. The size of the reamer is a fixed size, but as the reamer continues to work, the degree of wear on its surface also increases. After wear, the accuracy of the reamer decreases, resulting in errors.

[0003] The existing reamer sizes are all set by the tool manufacturers and are standard values. The reamer sizes cannot be adjusted during use. Once the tool is worn, it cannot be adjusted and the tool can only be scrapped and cannot be reused. At this time, a new reamer must be replaced, and the entire reamer must be replaced, which will inevitably increase the cost of use. Secondly, the integrated reamer has a greater disadvantage and the outer diameter of the reamer head cannot be replaced or adjusted. Utility Model Content

[0004] The utility model aims to provide a reamer with adjustable outer diameter, which can replace and adjust the outer diameter of the reamer head without replacing the entire reamer head.

[0005] To achieve the above object, a reamer with adjustable outer diameter is provided, comprising a sleeve and a fixing rod, wherein a positioning cavity is provided inside the sleeve, a reamer head is fixedly connected to the front end of the fixing rod, guide blocks are fixedly connected to both sides of the outer wall of the fixing rod, guide grooves adapted to the guide blocks are provided on both sides of the inner wall of the sleeve, and the rear end of the fixing rod is inserted into the positioning cavity;

[0006] Two positioning pins that move toward each other are also arranged inside the sleeve, and positioning holes are opened on both sides of the outer wall of the fixing rod and at the rear end of the guide block, and the positioning pins are adapted to the positioning holes.

[0007] According to the described reamer with adjustable outer diameter, a cavity is opened on the left side inside the sleeve, a knob is rotatably connected to one side of the upper surface of the sleeve, the bottom of the knob penetrates into the interior of the cavity through a rotating shaft, and is fixedly connected to a bidirectional threaded rod, the outer walls at both ends of the bidirectional threaded rod are threadedly connected to thread blocks, one side of the two thread blocks are fixedly connected to a connecting rod, and the two locating pins are respectively fixed to the outer ends of the two connecting rods.

[0008] According to the outer diameter adjustable reamer, the outer surface of the knob is provided with anti-slip grooves.

[0009] According to the outer diameter adjustable reamer, the positioning pin and the guide groove are on the same linear diameter.

[0010] According to the outer diameter adjustable reamer, the positioning pin and the guide groove are on different linear diameters.

[0011] According to the outer diameter adjustable reamer, the length of the positioning pin is consistent with the depth of the positioning hole.

[0012] According to the outer diameter adjustable reamer, the length of the positioning pin is three quarters of the depth of the positioning hole.

[0013] According to the outer diameter adjustable reamer, the length of the guide block is consistent with the length of the guide groove.

[0014] According to the outer diameter adjustable reamer, the length of the guide block is three quarters of the length of the guide groove.

[0015] The utility model has the following beneficial effects:

[0016] 1. Compared with the prior art, this outer diameter adjustable reamer is provided with a sleeve, a guide groove, and is adapted to a fixed rod and a guide block. The fixed rod is inserted into the sleeve, and the guide block is inserted along the guide groove to play a positioning role.

[0017] 2. Compared with the prior art, this outer diameter adjustable reamer is provided with a knob, a bidirectional threaded rod, a threaded block, a connecting rod, a locating pin, and is adapted to a fixed rod and a locating pin. By turning the knob, the bidirectional threaded rod is driven to rotate, thereby driving the two threaded blocks and the two connecting rods to move toward each other, and then driving the two locating pins to move toward each other, and inserting them into the locating pin of the fixed rod to complete the positioning and prevent them from falling off.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 1 This is a schematic diagram of the overall structure of a reamer with adjustable outer diameter according to the utility model;

[0021] Figure 2 This is a schematic diagram of the sleeve structure of a reamer with adjustable outer diameter according to the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of a fixed rod of a reamer with adjustable outer diameter according to the utility model;

[0023] Figure 4 This is a schematic cross-sectional view of a sleeve of a reamer with adjustable outer diameter according to the utility model;

[0024] Figure 5 The utility model is a cross-sectional schematic diagram of a fixing rod of a reamer with adjustable outer diameter.

[0025] Legend:

[0026] 1. Sleeve; 2. Fixed rod; 3. Reamer head; 4. Guide block; 5. Positioning cavity; 6. Cavity; 7. Knob; 8. Bidirectional threaded rod; 9. Threaded block; 10. Connecting rod; 11. Positioning pin; 12. Guide groove; 13. Positioning hole. DETAILED DESCRIPTION

[0027] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0028] Reference Figure 1-5 The utility model embodiment is a reamer with adjustable outer diameter, which includes a sleeve 1 and a fixed rod 2. A positioning cavity 5 is opened inside the sleeve 1. A reamer head 3 is fixedly connected to the front end of the fixed rod 2. The reamer head 3 is integrally connected to the fixed rod 2. The size of the fixed rod 2 is certain and can adapt to reamer heads 3 with different outer diameters. Guide blocks 4 are fixedly connected on both sides of the outer wall of the fixed rod 2. Guide grooves 12 adapted to the guide blocks 4 are opened on both sides of the inner wall of the sleeve 1. The length of the guide block 4 is consistent with the length of the guide groove 12. The rear end of the fixed rod 2 is inserted into the positioning cavity 5.

[0029] In the above structure, the fixing rod 2 is inserted into the positioning cavity 5 of the sleeve 1, and the guide block 4 is inserted along the guide groove 12 to play a positioning role.

[0030] Two locating pins 11 that move toward each other are also provided inside the sleeve 1. The locating pins 11 and the guide groove 12 are on the same linear diameter. Specifically, a cavity 6 is opened on the left side inside the sleeve 1, and a knob 7 is rotatably connected to one side of the upper surface of the sleeve 1. The outer surface of the knob 7 is provided with anti-slip grooves to play an anti-slip role. The bottom of the knob 7 passes through the interior of the cavity 6 through a rotating shaft and is fixedly connected with a bidirectional threaded rod 8. The outer walls of both ends of the bidirectional threaded rod 8 are threadedly connected with thread blocks 9, and one side of the two thread blocks 9 is fixedly connected with a connecting rod 10. The two locating pins 11 are respectively fixed to the outer ends of the two connecting rods 10, and locating holes 13 are opened on both sides of the outer wall of the fixed rod 2 and at the rear end of the guide block 4. The length of the locating pin 11 is consistent with the depth of the locating hole 13, and the locating pin 11 is adapted to the locating hole 13.

[0031] The above structure drives the bidirectional threaded rod 8 to rotate by rotating the knob 7, thereby driving the two threaded blocks 9 and the two connecting rods 10 to move toward each other, and then drives the two positioning pins 11 to move toward each other, and inserts them into the positioning pins 11 of the fixing rod 2 to complete the positioning and avoid falling off.

[0032] Embodiment 2:

[0033] The difference between this embodiment and the first embodiment is that the positioning pin 11 and the guide groove 12 are on different linear diameters to form different insertion directions, and the functions are the same as those of the first embodiment;

[0034] Secondly, the length of the positioning pin 11 is three quarters of the depth of the positioning hole 13, and the length of the guide block 4 is three quarters of the length of the guide groove 12, leaving a margin, and the function is the same as that of the first embodiment.

[0035] Working principle: When using the reamer with adjustable outer diameter, the fixing rod 2 and the reamer head 3 are replaced according to the actual usage to adjust the outer diameter size; specifically, the fixing rod 2 is inserted into the positioning cavity 5 of the sleeve 1, and the guide block 4 is inserted along the guide groove 12 to play a positioning role. Secondly, by turning the knob 7, the bidirectional threaded rod 8 is driven to rotate, and then the two threaded blocks 9 and the two connecting rods 10 are driven to move toward each other, which can drive the two positioning pins 11 to move toward each other and insert them into the positioning pins 11 of the fixing rod 2 to complete the positioning and avoid falling off.

[0036] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A reamer with adjustable outer diameter, characterized in that: The invention comprises a sleeve (1) and a fixing rod (2), wherein a positioning cavity (5) is provided inside the sleeve (1), a reamer head (3) is fixedly connected to the front end of the fixing rod (2), guide blocks (4) are fixedly connected to both sides of the outer wall of the fixing rod (2), guide grooves (12) adapted to the guide blocks (4) are provided on both sides of the inner wall of the sleeve (1), and the rear end of the fixing rod (2) is inserted into the positioning cavity (5); Two positioning pins (11) that move toward each other are also arranged inside the sleeve (1), and positioning holes (13) are provided on both sides of the outer wall of the fixing rod (2) and at the rear end of the guide block (4), and the positioning pins (11) are adapted to fit the positioning holes (13).

2. The outer diameter adjustable reamer according to claim 1, characterized in that: A cavity (6) is provided on the left side of the interior of the sleeve (1); a knob (7) is rotatably connected to one side of the upper surface of the sleeve (1); the bottom of the knob (7) penetrates into the interior of the cavity (6) via a rotating shaft and is fixedly connected to a bidirectional threaded rod (8); both ends of the bidirectional threaded rod (8) are threadedly connected to thread blocks (9); one side of the two thread blocks (9) is fixedly connected to a connecting rod (10); and the two positioning pins (11) are respectively fixed to the outer ends of the two connecting rods (10).

3. The outer diameter adjustable reamer according to claim 2, characterized in that: The outer surface of the knob (7) is provided with anti-slip grooves.

4. The outer diameter adjustable reamer according to claim 1, characterized in that: The positioning pin (11) and the guide groove (12) are on the same linear diameter.

5. The outer diameter adjustable reamer according to claim 1, characterized in that: The positioning pin (11) and the guide groove (12) are on different line diameters.

6. The outer diameter adjustable reamer according to claim 1, characterized in that: The length of the positioning pin (11) is consistent with the depth of the positioning hole (13).

7. The outer diameter adjustable reamer according to claim 1, characterized in that: The length of the positioning pin (11) is three quarters of the depth of the positioning hole (13).

8. The outer diameter adjustable reamer according to claim 1, characterized in that: The length of the guide block (4) is consistent with the length of the guide groove (12).

9. The outer diameter adjustable reamer according to claim 1, characterized in that: The length of the guide block (4) is three quarters of the length of the guide groove (12).

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