A clamping device for turning a double yoke on an external circle

Abstract

This utility model discloses a clamping device for turning the outer diameter of a double-fork, including a clamping seat, a flange, and a tailstock connecting rod. The clamping seat includes a mounting sleeve, a sliding shaft, side positioning blocks, and an inner cavity positioning plate. The sliding shaft is slidably connected inside the mounting sleeve and its front end protrudes beyond the front end of the mounting sleeve. This utility model connects two clamping seats to the lathe spindle and the lathe tailstock respectively via the flange and the tailstock connecting rod. The two clamping seats fix and clamp the double fork at both ends. The inner cavity positioning plates of the two clamping seats, along with springs and a telescopic shaft, form a flexible positioning clamping of the double fork from the front and rear inner cavities. The side positioning blocks of the two clamping seats form a rigid positioning clamping of the double fork at the four corners of the double fork's side, thereby restricting the six degrees of freedom of the double fork and fixing it to the lathe spindle. Furthermore, the clamping parts do not obstruct the upper and lower surfaces of the double fork forging blank, facilitating the machining of the upper and lower outer cylindrical surfaces of the double fork forging blank.

Description

Technical Field

[0001] This utility model belongs to the field of machining technology, and in particular relates to a clamping device for double-fork external turning. Background Technology

[0002] When machining the upper and lower outer cylindrical surfaces of a double fork forging blank, the double fork forging blank needs to be fixed on a lathe. However, the current common lathe fixture, which is a three-jaw chuck at the lathe spindle and a rotating center at the tailstock, cannot achieve the external positioning and clamping of the double fork forging blank. Utility Model Content

[0003] In view of the problems existing in the prior art, the purpose of this utility model is to provide a clamping device for double-fork external turning.

[0004] To solve the above problems, the present invention adopts the following technical solution: A clamping device for external cylindrical turning of a double fork includes a clamping seat, a flange, and a tailstock connecting rod. The clamping seat includes a mounting sleeve, a sliding shaft, a side positioning block, and an inner cavity positioning plate. The sliding shaft is slidably connected inside the mounting sleeve and its front end protrudes beyond the front end of the mounting sleeve. A spring is provided inside the mounting sleeve to push the sliding shaft out of the front end of the mounting sleeve. The inner cavity positioning plate is vertically connected to the front end of the sliding shaft. The upper and lower surfaces of the inner cavity positioning plate are inclined surfaces that match the upper and lower inclined surfaces of the inner cavity of the double fork. The side positioning block includes a connecting plate and two positioning plates. The connecting plate is vertically connected to the front end of the mounting sleeve, and the two positioning plates are symmetrically connected to the left and right sides of the connecting plate. The facing surfaces of the two positioning plates are inclined surfaces that match the inclined surfaces of the left and right side walls of the double fork. There are two clamping seats, and the two clamping seats are arranged facing each other with the sliding shaft as the front end. The end of the mounting sleeve of one clamping seat is connected to the flange, and the end of the mounting sleeve of the other clamping seat is connected to the tailstock connecting rod.

[0005] Preferably, the mounting sleeve has a sliding hole at its rear end, and an internal thread at the end of the sliding hole. The mounting sleeve has a through hole at its front end, which connects the sliding hole to the front end of the mounting sleeve. The sliding shaft is slidably connected within the sliding hole, and its front end extends from the through hole to the front end of the mounting sleeve. The inner cavity positioning plate is threaded to the front end of the sliding shaft, and the connecting plate is threaded to the front end of the mounting sleeve. The flange is threaded to the outside of the end of the mounting sleeve of one of the clamping seats. An end cap is threaded to the internal thread of the sliding hole of the mounting sleeve, and a spring inside the mounting sleeve abuts against the end cap and the sliding shaft. The tailstock connecting rod is threaded to the internal thread of the end of the mounting sleeve of the other clamping seat, and a spring inside the mounting sleeve abuts against the tailstock connecting rod and the sliding shaft.

[0006] Preferably, the diameter of the through hole is smaller than the diameter of the sliding hole, and the sliding shaft is a stepped shaft, with the thinner end of the stepped shaft extending out of the through hole from the front end of the mounting sleeve, and the thicker end slidably connected inside the sliding hole.

[0007] The beneficial effects of this utility model are: Compared with existing technologies, the advantages of this utility model are: This invention connects two clamping seats to the lathe spindle and tailstock respectively via a flange and a tailstock connecting rod. The two clamping seats fix and clamp the double fork at both ends. The inner cavity positioning plates, springs, and telescopic shafts of the two clamping seats form a flexible positioning clamp for the double fork from the front and rear inner cavities. The side positioning blocks of the two clamping seats form a rigid positioning clamp for the double fork at the four corners of the side of the double fork, thereby restricting the six degrees of freedom of the double fork and fixing the double fork to the lathe spindle. The clamping parts do not obstruct the upper and lower surfaces of the double fork forging blank, which is convenient for machining the upper and lower outer cylindrical surfaces of the double fork forging blank. This invention adopts a combination of flexible positioning in the inner cavity and rigid positioning on the outer side to ensure that the double fork is clamped in place in both the inner and outer cavities. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a sectional view of the present invention with the vertical plane as the cross section; Figure 3 This is a sectional view of the present invention with the horizontal plane as the cross-section; Figure 4 This is a cross-sectional view of the mounting sleeve of this utility model.

[0009] In the diagram: 1. Flange; 2. Tailstock connecting rod; 3. Mounting sleeve; 31. Spring; 32. Sliding hole; 33. Internal thread; 34. Through hole; 4. Sliding shaft; 5. Side positioning block; 51. Connecting plate; 52. Positioning plate; 6. Inner cavity positioning plate; 7. End cover. Detailed Implementation

[0010] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0011] like Figure 1-4As shown, this utility model provides a technical solution: a clamping device for double-fork external turning, including a clamping seat, a flange 1, and a tailstock connecting rod 2. The clamping seat includes a mounting sleeve 3, a sliding shaft 4, a side positioning block 5, and an inner cavity positioning plate 6. The sliding shaft 4 is slidably connected inside the mounting sleeve 3 and its front end protrudes beyond the front end of the mounting sleeve 3. A spring 31 is provided inside the mounting sleeve 3 to push the sliding shaft 4 toward the front end of the mounting sleeve 3. The inner cavity positioning plate 6 is vertically connected to the front end of the sliding shaft 4, and the upper and lower surfaces of the inner cavity positioning plate 6 are aligned with the double-fork external turning mechanism. The inner cavity of the fork has matching inclined surfaces on the upper and lower slopes. The side positioning block 5 includes a connecting plate 51 and two positioning plates 52. The connecting plate 51 is vertically connected to the front end of the mounting sleeve 3. The two positioning plates 52 are symmetrically connected to the left and right sides of the connecting plate 51. The facing side of the two positioning plates 52 is an inclined surface that matches the inclined surfaces of the left and right side walls of the double fork. There are two clamping seats, and the two clamping seats are arranged facing each other with the sliding shaft 4 as the front end. The end of the mounting sleeve 3 of one clamping seat is connected to the flange 1, and the end of the mounting sleeve 3 of the other clamping seat is connected to the tailstock connecting rod 2.

[0012] In use, flange 1 is bolted to the lathe spindle. A clamping seat is mounted on the lathe spindle via flange 1. Tailstock connecting rod 2 replaces the center in the lathe tailstock rotating center. Another clamping seat is mounted on the lathe tailstock via tailstock connecting rod 2. The lathe tailstock is adjusted to slide towards the lathe. The two clamping seats securely hold the double fork at both ends. When the two clamping seats approach each other, the inner cavity positioning plate 6 first contacts the inner cavity of the double fork. The springs 31 of the two clamping seats compress, providing elastic force to push the sliding shaft 4 forward along the mounting sleeve 3, providing clamping preload to the inner cavity positioning plate 6. This causes the upper and lower inclined surfaces of the inner cavity positioning plate 6 to press against the upper and lower inclined surfaces of the double fork's inner cavity, forming a clamp on the front and rear inner cavities of the double fork. This restricts the two translational degrees of freedom of the double fork in the vertical and horizontal directions and the two rotational degrees of freedom of rotation around the left and right and horizontal directions. As the two clamping seats continue to approach, the mounting sleeve 3 continues to approach, and the mounting sleeve 3 pushes the two side positioning blocks 5 to clamp the double fork. The two positioning plates 52 on the left and right sides of the connecting plate 51 press against the inclined surfaces of the left and right side walls of the double fork respectively. The four positioning plates 52 of the two side positioning blocks 5 are clamped at the four corners of the double fork, restricting the two translational degrees of freedom of the double fork to move in the left and right and forward and backward directions, as well as the two rotational degrees of freedom to rotate with the up and down and forward and backward directions as the center, thereby fixing the double fork on the lathe spindle.

[0013] This invention connects two clamping seats to the lathe spindle and tailstock respectively via flange 1 and tailstock connecting rod 2. The two clamping seats fix and clamp the double fork at both ends. The inner cavity positioning plates 6, springs 31, and sliding shafts 4 of the two clamping seats form flexible positioning clamps for the double fork from the front and rear inner cavities. The side positioning blocks 5 of the two clamping seats form rigid positioning clamps for the double fork at the four corners of the side of the double fork, thereby restricting the six degrees of freedom of the double fork and fixing the double fork to the lathe spindle. The clamping parts do not obstruct the upper and lower surfaces of the double fork forging blank, which is convenient for machining the upper and lower outer cylindrical surfaces of the double fork forging blank. This invention adopts a combination of flexible positioning in the inner cavity and rigid positioning on the outer side to ensure that the double fork is clamped in place in both the inner cavity and the outer side.

[0014] Specifically, the mounting sleeve 3 has a sliding hole 32 at its rear end, and an internal thread 33 at the end of the sliding hole 32. The mounting sleeve 3 has a through hole 34 at its front end, which connects the sliding hole 32 to the front end of the mounting sleeve 3. The sliding shaft 4 is slidably connected in the sliding hole 32, and its front end extends out of the through hole 34 from the front end of the mounting sleeve 3. The inner cavity positioning plate 6 is threaded to the front end of the sliding shaft 4. The connecting plate 51 is threaded to the front end of the mounting sleeve 3. The flange 1 is threaded to the outside of the end of the mounting sleeve 3 of one of the clamping seats. An end cap 7 is threaded to the internal thread 33 of the sliding hole 32 of the mounting sleeve 3. A spring 31 inside the mounting sleeve 3 abuts against the end cap 7 and the sliding shaft 4. The tailstock connecting rod 2 is threaded to the internal thread 33 at the end of the mounting sleeve 3 of the other clamping seat. A spring 31 inside the mounting sleeve 3 abuts against the tailstock connecting rod 2 and the sliding shaft 4.

[0015] Furthermore, the diameter of the through hole 34 is smaller than the diameter of the sliding hole 32, and the sliding shaft 4 is a stepped shaft. The thinner end of the stepped shaft extends out of the front end of the mounting sleeve 3 from the through hole 34, and the thicker end is slidably connected in the sliding hole 32. The side wall of the through hole 34 forms a stop for the thicker part of the stepped shaft to prevent the sliding shaft 4 from coming out of the mounting sleeve 3.

[0016] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A clamping device for external cylindrical turning with a double fork, characterized in that, The device includes a clamping seat, a flange (1), and a tailstock connecting rod (2). The clamping seat includes a mounting sleeve (3), a sliding shaft (4), a side positioning block (5), and an inner cavity positioning plate (6). The sliding shaft (4) is slidably connected inside the mounting sleeve (3) and its front end protrudes beyond the front end of the mounting sleeve (3). A spring (31) is provided inside the mounting sleeve (3) to push the sliding shaft (4) toward the front end of the mounting sleeve (3). The inner cavity positioning plate (6) is vertically connected to the front end of the sliding shaft (4). The upper and lower surfaces of the inner cavity positioning plate (6) are inclined surfaces that match the upper and lower inclined surfaces of the double-fork inner cavity. The side positioning block (5) includes a connecting plate (51) and two positioning plates (52). The connecting plate (51) is vertically connected to the front end of the mounting sleeve (3). The two positioning plates (52) are symmetrically connected to the left and right sides of the connecting plate (51). The facing side of the two positioning plates (52) is an inclined surface that matches the inclined surface of the left and right side walls of the double fork. There are two clamping seats, and the two clamping seats are set facing each other with the sliding shaft (4) as the front end. The end of the mounting sleeve (3) of one clamping seat is connected to the flange (1), and the end of the mounting sleeve (3) of the other clamping seat is connected to the tailstock connecting rod (2).

2. A clamping device for turning of a double yoke on an external cylindrical surface according to claim 1, characterized in that The mounting sleeve (3) has a sliding hole (32) at its rear end, and an internal thread (33) at the end of the sliding hole (32). The mounting sleeve (3) has a through hole (34) at its front end, which connects the sliding hole (32) to the front end of the mounting sleeve (3). The sliding shaft (4) is slidably connected in the sliding hole (32) and its front end extends out of the through hole (34) from the front end of the mounting sleeve (3). The inner cavity positioning plate (6) is threaded to the front end of the sliding shaft (4), and the connecting plate (51) is threaded to the front end of the mounting sleeve (3). The flange (1) is threaded to the end of the mounting sleeve (3) of one of the clamping seats. An end cap (7) is threaded to the internal thread (33) of the sliding hole (32) of the mounting sleeve (3). A spring (31) inside the mounting sleeve (3) abuts against the end cap (7) and the sliding shaft (4). The tailstock connecting rod (2) is threaded to the internal thread (33) at the end of the mounting sleeve (3) of the other clamping seat. A spring (31) inside the mounting sleeve (3) abuts against the tailstock connecting rod (2) and the sliding shaft (4).

3. A chucking device for turning of a double yoke on an external circle according to claim 2, characterized in that The diameter of the through hole (34) is smaller than the diameter of the sliding hole (32). The sliding shaft (4) is a stepped shaft. The thin end of the stepped shaft extends out of the through hole (34) from the front end of the mounting sleeve (3), and the thick end is slidably connected in the sliding hole (32).

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