Numerically controlled lathe tool for turning engineering machinery pin shaft

Abstract

The utility model relates to the technical field of pin shaft machining equipment, and provides a numerical control lathe tool for turning a pin shaft of engineering machinery, which comprises a lathe body and a three-jaw chuck arranged in the lathe body and used for clamping the pin shaft, the lathe body is rotatably connected with a mounting disc, the mounting disc is provided with a positioning rod extending towards the direction of the three-jaw chuck, and the positioning rod is connected with the three-jaw chuck. A sleeve is arranged at the end, away from the mounting disc, of the positioning rod, and a pin shaft is inserted from the front end of the three-jaw chuck and penetrates into an inner cavity of the sleeve to form interference fit. The positioning device overcomes the defects in the prior art, is reasonable in design and compact in structure, positions and supports one end of the pin shaft through the positioning rod and the sleeve in the machining process, and avoids the situation that in the machining process of the long pin shaft, one end of the long pin shaft exceeds the three-jaw chuck too long, the pin shaft generates axial displacement or vibration under the action of feeding force or cutting force, and consequently machining precision is lowered. And pin shafts with different lengths can be conveniently positioned and supported by replacing the first screw rod or the second screw rod, so that the practicability of the device is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pin shaft processing equipment, in particular to a numerically controlled lathe tool for turning pin shafts of engineering machinery. Background Art

[0002] Pins are key connectors in machinery, used to fix and transmit torque. Turning, as an efficient and precise metal cutting method, is widely used in the manufacturing process of pins. During this process, the three-jaw chuck can firmly and accurately clamp the pin through its three independently adjustable jaws, ensuring that it maintains a stable rotation state during the processing.

[0003] However, the lengths of the pins are different. When processing a long pin, one end of the pin passes through the three-jaw chuck for a long distance. During the rotation process, the pin may produce axial displacement or vibration due to the feed force or cutting force, thereby reducing the processing accuracy. For this reason, we propose a CNC lathe tooling for turning the pins of engineering machinery. Utility Model Content

[0004] (1) Technical problems solved

[0005] In view of the deficiencies in the prior art, the utility model provides a CNC lathe tool for turning a pin shaft of an engineering machinery to solve the above-mentioned problems in the prior art.

[0006] (2) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a CNC lathe tooling for turning a pin shaft of engineering machinery comprises a lathe body and a three-jaw chuck arranged therein for clamping the pin shaft, the lathe body is rotatably connected to a mounting plate, the mounting plate is provided with a positioning rod extending toward the three-jaw chuck, the positioning rod is provided with a sleeve at one end away from the mounting plate, the pin shaft is inserted from the front end of the three-jaw chuck and passes through the inner cavity of the sleeve to form an interference fit, so that the three-jaw chuck, sleeve, positioning rod and mounting plate rotate synchronously.

[0008] Furthermore, the positioning rod includes a first screw rod, a second screw rod and a connecting portion, the connecting portion is arranged between the first screw rod and the second screw rod, and both ends of the connecting portion are respectively threadedly connected to the first screw rod and the second screw rod.

[0009] Furthermore, the connecting portion includes a first connecting block and a second connecting block, the first connecting block is sleeved on the end of the first screw to form a threaded connection, the second connecting block is sleeved on the end of the second screw to form a threaded connection, a slot is circumferentially provided at one end of the first connecting block, and an insert block that matches the slot is circumferentially provided at one end of the second connecting block.

[0010] Furthermore, the outer wall at the connection between the first screw and the first connecting block is threadedly connected to at least one nut for contacting the side wall of the first connecting block, and the outer wall at the connection between the second screw and the second connecting block is threadedly connected to at least one nut for contacting the side wall of the second connecting block.

[0011] Furthermore, one end of the positioning rod is threadedly connected to the mounting plate, and the outer wall of the positioning rod is threadedly connected to at least one nut for contacting the side wall of the mounting plate.

[0012] Furthermore, at least one nut is threadedly connected to the outer wall of the connection between the positioning rod and the sleeve, and the side wall of the nut abuts against the side wall of the sleeve.

[0013] Furthermore, a receiving groove is circumferentially provided in the sleeve, a clamping block is rotatably connected in the receiving groove, the clamping block extends out of the receiving groove on one side close to the positioning rod, and one side of the clamping block is connected to the inner wall of the receiving groove through a spring.

[0014] Furthermore, the outer wall of the mounting plate is connected to a driving plate that rotates synchronously with the three-jaw chuck through a belt drive.

[0015] (3) Beneficial effects

[0016] The embodiment of the utility model provides a CNC lathe tool for turning a pin shaft of an engineering machinery. It has the following beneficial effects:

[0017] 1. During the processing, the positioning rod and sleeve provide positioning support for one end of the pin to prevent one end of the long pin from extending too far beyond the three-jaw chuck during processing. This will cause axial displacement or vibration of the pin under the action of feed force or cutting force, resulting in a decrease in processing accuracy.

[0018] 2. By replacing the first screw or the second screw, it is convenient to position and support pins of different lengths. By rotating the first connecting block or the second connecting block, the overall length of the positioning rod can be fine-tuned, which is convenient for quickly positioning and supporting pins with small length differences, greatly improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a main perspective schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a left-side perspective diagram of the overall structure of the utility model;

[0021] Figure 3 This is a three-dimensional schematic diagram of the positioning rod structure of the utility model;

[0022] Figure 4 This is a schematic cross-sectional view of the positioning rod structure of the utility model;

[0023] Figure 5 This is a three-dimensional schematic diagram of the first connecting block structure of the utility model;

[0024] Figure 6 This is a three-dimensional schematic diagram of the second connecting block structure of the utility model;

[0025] Figure 7 For this utility model Figure 4 A magnified schematic diagram of the structure in the middle.

[0026] In the figure: 1. Lathe body; 2. Three-jaw chuck; 3. Mounting plate; 4. Positioning rod; 41. First screw; 42. Second screw; 431. First connecting block; 432. Second connecting block; 433. Slot; 434. Insert block; 5. Sleeve; 51. Receiving groove; 52. Block; 53. Spring; 6. Belt; 7. Drive plate. DETAILED DESCRIPTION

[0027] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, 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 embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0028] Refer to the attached Figure 1-3 The tooling of a CNC lathe for turning a pin shaft of engineering machinery comprises a lathe body 1 and a three-jaw chuck 2 arranged therein for clamping the pin shaft. A mounting plate 3 is rotatably connected to the lathe body 1, and a positioning rod 4 extending toward the three-jaw chuck 2 is provided on the mounting plate 3. A sleeve 5 is provided at the end of the positioning rod 4 facing away from the mounting plate 3. The pin shaft is inserted from the front end of the three-jaw chuck 2 and passes through the inner cavity of the sleeve 5 to form an interference fit. Then the three-jaw chuck 2 clamps the pin shaft. During the rotation of the three-jaw chuck 2, the sleeve 5, the positioning rod 4 and the mounting plate 3 rotate synchronously. During the processing, the sleeve 5 forms a positioning support for one end of the pin shaft to avoid the long pin shaft from exceeding the three-jaw chuck 2 too long during processing. The pin shaft produces axial displacement or vibration under the action of feed force or cutting force, resulting in a decrease in processing accuracy.

[0029] Refer to the attached Figure 4-6 The positioning rod 4 includes a first screw 41, a second screw 42 and a connecting portion. The connecting portion is arranged between the first screw 41 and the second screw 42. The two ends of the connecting portion are threadedly connected to the first screw 41 and the second screw 42 respectively. The positioning rod 4 is set to three sections. The length of the first screw 41 and the second screw 42 can be replaced, which is convenient for use with pins of different lengths, greatly improving the practicality of the device.

[0030] The first and second connecting blocks 431 and 432 are connected to each other to form a screw thread connection, so that the first and second connecting blocks 431 and 432 can be connected to each other to form a screw thread connection.

[0031] In this embodiment, the outer wall of the connection between the first screw 41 and the first connecting block 431 is threadedly connected to at least one nut, which is used to abut against the side wall of the first connecting block 431. The nut is used to abut against the first connecting block 431 to prevent the first screw 41 from rotating relative to the first connecting block 431 during the rotation of the positioning rod 4, thereby affecting the use of the positioning rod 4. The outer wall of the connection between the second screw 42 and the second connecting block 432 is threadedly connected to at least one nut, which is used to abut against the side wall of the second connecting block 432. The nut is used to abut against the second connecting block 432 to prevent the second screw 42 from rotating relative to the second connecting block 432 during the rotation of the positioning rod 4, thereby affecting the use of the positioning rod 4.

[0032] In this embodiment, one end of the positioning rod 4 is threadedly connected to the mounting plate 3, and the outer wall of the positioning rod 4 is threaded with at least one nut for abutting against the side wall of the mounting plate 3. The mounting plate 3 is abutted by the nut to prevent the positioning rod 4 from rotating relative to the mounting plate 3 during operation, thereby improving the stability of the device.

[0033] In this embodiment, at least one nut is threadedly connected to the outer wall of the connection between the positioning rod 4 and the sleeve 5, and the side wall of the nut abuts against the side wall of the sleeve 5. The abutment of the nut against the side wall of the sleeve 5 prevents the positioning rod 4 from rotating relative to the sleeve 5 during the project, thereby improving the stability of the device.

[0034] Refer to the attached Figure 7The sleeve 5 is provided with a receiving groove 51 in the circumferential direction, and a clamping block 52 is rotatably connected in the receiving groove 51. The clamping block 52 extends out of the receiving groove 51 on the side close to the positioning rod 4. One side of the clamping block 52 is connected to the inner wall of the receiving groove 51 through a spring 53. When the pin is inserted into the sleeve 5, it pushes the clamping block 52 beyond one end of the receiving groove 51. At this time, the clamping block 52 rotates, and its other end contacts the side wall of the pin, and then the pin is clamped by the three-jaw chuck 2, making the connection between the pin and the sleeve 5 more stable. During the operation of the device, the sleeve 5 rotates relative to the three-jaw chuck 2, thereby improving the stability of the device.

[0035] Refer to the attached Figure 2 The outer wall of the mounting plate 3 is connected to a driving plate 7 which rotates synchronously with the three-jaw chuck 2 through a belt 6. The driving plate 7 and the three-jaw chuck 2 rotate synchronously, which further enables the mounting plate 3, the positioning rod 4, and the sleeve 5 to rotate synchronously with the three-jaw chuck 2, thereby facilitating the positioning and support of the pin shaft and preventing the pin shaft from vibrating or displacing during the rotation process.

[0036] Furthermore, synchronous rotation can be achieved by adding a motor or directly using a motor to drive the three-jaw chuck 2 to rotate. This synchronous rotation method is a conventional technical means in this field and will not be described in detail in this application.

[0037] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A CNC lathe tool for turning a pin shaft of an engineering machinery, comprising a lathe body (1) and a three-jaw chuck (2) arranged therein for clamping the pin shaft, characterized in that: The lathe body (1) is rotatably connected to a mounting plate (3), and the mounting plate (3) is provided with a positioning rod (4) extending toward the three-jaw chuck (2). The end of the positioning rod (4) facing away from the mounting plate (3) is provided with a sleeve (5). A pin is inserted from the front end of the three-jaw chuck (2) and passes through the inner cavity of the sleeve (5), forming an interference fit, so that the three-jaw chuck (2), the sleeve (5), the positioning rod (4) and the mounting plate (3) rotate synchronously.

2. The CNC lathe tool for turning a pin shaft of an engineering machinery according to claim 1, characterized in that: The positioning rod (4) comprises a first screw rod (41), a second screw rod (42) and a connecting portion, wherein the connecting portion is arranged between the first screw rod (41) and the second screw rod (42), and the two ends of the connecting portion are respectively threadedly connected to the first screw rod (41) and the second screw rod (42).

3. The CNC lathe tool for turning a pin shaft of an engineering machinery according to claim 2, characterized in that: The connecting portion includes a first connecting block (431) and a second connecting block (432), wherein the first connecting block (431) is sleeved on the end of the first screw rod (41) to form a threaded connection, and the second connecting block (432) is sleeved on the end of the second screw rod (42) to form a threaded connection, and a slot (433) is circumferentially provided at one end of the first connecting block (431), and an insert block (434) that matches the slot (433) is circumferentially provided at one end of the second connecting block (432).

4. The CNC lathe tool for turning a pin shaft of an engineering machinery according to claim 3, characterized in that: The outer wall of the connection between the first screw rod (41) and the first connecting block (431) is threadedly connected to at least one nut for contacting the side wall of the first connecting block (431); the outer wall of the connection between the second screw rod (42) and the second connecting block (432) is threadedly connected to at least one nut for contacting the side wall of the second connecting block (432).

5. The CNC lathe tool for turning a pin shaft of an engineering machinery according to claim 1, characterized in that: One end of the positioning rod (4) is threadedly connected to the mounting plate (3), and the outer wall of the positioning rod (4) is threadedly connected to at least one nut for contacting the side wall of the mounting plate (3).

6. The CNC lathe tool for turning a pin shaft of an engineering machinery according to claim 1, characterized in that: The outer wall of the connection between the positioning rod (4) and the sleeve (5) is threadedly connected with at least one nut, and the side wall of the nut abuts against the side wall of the sleeve (5).

7. The CNC lathe tool for turning a pin shaft of an engineering machinery according to claim 6, characterized in that: The sleeve (5) is provided with an accommodating groove (51) on its inner circumference. A clamping block (52) is rotatably connected to the accommodating groove (51). The clamping block (52) extends out of the accommodating groove (51) on one side close to the positioning rod (4). One side of the clamping block (52) is connected to the inner wall of the accommodating groove (51) via a spring (53).

8. The CNC lathe tool for turning a pin shaft of an engineering machinery according to any one of claims 1 to 7, characterized in that: The outer wall of the mounting plate (3) is connected to a driving plate (7) which rotates synchronously with the three-jaw chuck (2) via a belt (6).

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