Diameter-variable clamp with adjustable spacing

Abstract

The utility model discloses a distance-adjustable reducing clamp which comprises a fixing seat, two clamp rod assemblies arranged in pairs are arranged on the fixing seat, one clamp rod assembly is fixedly connected with the fixing seat, and the other clamp rod assembly is connected with the fixing seat in a sliding mode. A driving device for driving the clamp rod assembly to move is arranged on the fixed seat; the clamp rod assembly comprises a mounting frame, sliding pieces arranged in pairs and driving air cylinders arranged in pairs are arranged in the mounting frame, and the driving air cylinders drive the sliding pieces to move relative to the mounting frame. The sliding piece is provided with clamping assemblies arranged in pairs, and the moving direction of the sliding piece is perpendicular to the moving direction of the clamp rod assemblies. The two clamp rod assemblies can move relatively, so that the center-to-center distance between two hubs can be adjusted conveniently; the clamping assembly can move relative to the fixing base so as to clamp hubs of different sizes in a matched mode, the universality is good, and the clamping efficiency is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of clamping devices, and in particular relates to a diameter-variable clamp with adjustable spacing. Background Art

[0002] Wheel hubs typically require clamping and positioning during machining, and wheel hub clamping devices are commonly used. Patent document CN209364460U discloses a wheel hub fixture that uses a cylinder to control the relative movement of two clamping frames equipped with rollers. The wheel hub of existing wheel hub fixtures remains fixed relative to the clamping frames, which can only clamp wheels within a specific size range and has poor versatility. Furthermore, only one set of clamps is provided on the frame, which can only clamp a single wheel hub at a time, resulting in low clamping and transfer efficiency. Therefore, it is necessary to design a variable diameter fixture with adjustable spacing to overcome the above difficulties. Summary of the Invention

[0003] In response to the problems existing in the prior art, the utility model designs a spacing-adjustable diameter-changing clamp. The two clamp rod assemblies of the utility model can move relative to each other, which can conveniently adjust the center distance between the two wheel hubs; the clamping assembly can move relative to the fixed seat, thereby adapting to clamping wheel hubs of different sizes, with good versatility and high clamping efficiency.

[0004] The invention object of the utility model is achieved through the following technical solutions: a spacing adjustable diameter clamp, including a fixed seat, on which are provided two clamp rod assemblies arranged in pairs, one of the clamp rod assembly is fixedly connected to the fixed seat, and the other of the clamp rod assembly is slidably connected to the fixed seat; the fixed seat is provided with a driving device for driving the clamp rod assembly to move; the clamp rod assembly includes a mounting frame, in which are provided paired sliding members and paired driving cylinders, which drive the sliding members to move relative to the mounting frame; the sliding members are provided with paired clamping assemblies, and the moving direction of the sliding members and the moving direction of the clamp rod assembly are arranged perpendicular to each other.

[0005] Preferably, the driving device includes a driving motor, a screw rod and a slider; a first track arranged in pairs is provided in the fixed seat, and the slider is slidably installed on the first track; the driving motor is fixedly installed in the fixed seat, the screw rod is rotatably connected to the fixed seat, and the end of the screw rod is connected to the driving motor; the slider is provided with a ball screw fixedly connected to it, the ball screw is sleeved on the screw rod, and the ball screw and the screw rod are engaged with each other; when the driving motor drives the screw rod to rotate, the slider moves relative to the fixed seat.

[0006] Preferably, the end of the slider facing away from the driving motor is provided with a clamp rod assembly fixedly connected thereto; and a dust cover is provided between the clamp rod assembly and the fixing seat.

[0007] The driving motor drives the screw rod to rotate when working, and the sliding block can move along the first track relative to the fixed seat when the screw rod rotates. The sliding block is fixedly connected with the clamp rod assembly, so that the two clamp rod assemblies can move relative to each other. Then the center distance of the two wheel hubs can be adjusted to adapt to wheel hubs of different sizes. In the actual blanking process, the center distance of the two wheel hubs usually needs to be kept consistent. Therefore, the driving device is used to adjust the center distance of the two wheel hubs, which facilitates the placement of the wheel hubs in the next process. The dust cover is arranged to prevent impurities from entering the fixed seat.

[0008] As preferred, the two clamp rod assemblies are distributed at the left and right ends of the fixed seat, and the clamp rod assembly further comprises a mounting limiting seat, a transmission gear, a rack and a connecting head. The mounting frame is provided with a pair of second tracks, and the sliding member is slidingly installed on the second tracks. The sliding member is provided with a driving cylinder fixedly connected thereto, and the piston shaft of the driving cylinder is provided with a connecting head connected with the inner wall of the mounting frame. The end surface of the sliding member is provided with a pair of clamping assemblies symmetrically arranged above and below.

[0009] As preferred, the bottom of the mounting frame is provided with a mounting limiting seat fixedly connected thereto, and the mounting limiting seat is provided with a transmission gear rotatably connected thereto. The sliding member is provided with a rack fixedly connected thereto, and the two racks on the two clamp rod assemblies are arranged on the two sides of the transmission gear.

[0010] As preferred, each rack is arranged parallel to the second track. The mounting limiting seat is provided with a limiting hole, and the rack is inserted in the limiting hole. The hole diameter of the limiting hole and the outer diameter of the rack are adapted to each other.

[0011] As preferred, the sliding member is provided with a hollow limiting groove, and the two sliding members are arranged adjacent to each other. Each sliding member is provided with a driving cylinder, and the cylinder body of the driving cylinder is inserted in the hollow limiting groove arranged adjacent thereto.

[0012] When the driving cylinder works, the piston shaft of the driving cylinder extends and retracts, and the connecting head is connected with the mounting frame. Thus, the sliding member can move along the second track relative to the mounting frame when the driving cylinder works, so that the clamping assemblies can move close to or away from each other, thereby clamping or releasing the wheel hub. By arranging the transmission gear and the rack, the moving pace of the two sliding members remains consistent, and the synchronization is good, so that the clamping assemblies can accurately clamp the wheel hub. By arranging the mounting limiting seat, the transmission gear is conveniently installed. By limiting the rack with the limiting hole, the meshing process of the rack and the transmission gear is more stable, and the clamping state of the clamping assembly is more stable. By limiting the sliding members with the hollow limiting grooves, the path of the sliding members remains fixed, and the sliding members move more stably, so that the clamping assemblies can reliably clamp the wheel hub.

[0013] Preferably, the clamping assembly includes a mounting rod, a first fixing ring and a second fixing ring; the mounting rod is fixedly mounted on the sliding member; the mounting rod is provided with a first fixing ring and a second fixing ring fixedly connected to it, the first fixing ring is arranged at the end of the mounting rod, and the second fixing ring and the first fixing ring are arranged opposite to each other; a first clamping rubber stick is provided between the first fixing ring and the second fixing ring, and the first clamping rubber stick is sleeved and mounted on the mounting rod; a second clamping rubber stick and an elastic member are also sleeved and mounted on the mounting rod; the end of the second clamping rubber stick rests on the second fixing ring, one end of the elastic member rests on the sliding member, and the other end of the elastic member rests on the second clamping rubber stick.

[0014] The first clamping rubber stick can rotate relative to the mounting rod, and the second clamping rubber stick can rotate and extend relative to the mounting rod, so that the second clamping rubber stick can extend and extend relative to the first clamping rubber stick. The two clamping assemblies are close to each other, and the four first clamping rubber sticks abut against one end face of the wheel hub, and the four second clamping rubber sticks abut against the other end face of the wheel hub. The wheel hub is then clamped between the first clamping rubber stick and the second clamping rubber stick. The first clamping rubber stick and the second clamping rubber stick cooperate with each other to achieve eight-point positioning, which provides good and reliable clamping. Because the spacing between the two clamping assemblies can be arbitrarily adjusted, wheel hubs of different sizes can be clamped.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The two clamp rod assemblies of the present invention can move relative to each other, which makes it convenient to clamp two wheel hubs at the same time; at the same time, it is convenient to adjust the center distance between the two wheel hubs, which facilitates the cutting of the wheel hubs; 2. Each of the clamp rod assemblies is provided with a pair of clamping assemblies, which can slide relatively synchronously to adapt to clamping wheel hubs of different sizes, with good versatility and stable and reliable clamping; 3. The two clamping assemblies cooperate with each other to achieve eight-point positioning clamping of a single wheel hub, and the clamping is more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the utility model;

[0017] Figure 2 is a diagram of the internal structure of the clamp rod assembly;

[0018] Figure 3 The exploded view of the clamp rod assembly;

[0019] Figure 4 The exploded view of the clamping assembly;

[0020] Figure 5 This is the internal structure diagram of the drive device;

[0021] Markings in the figure: 1. Fixed seat; 2. Clamp rod assembly; 21. Mounting frame; 22. Sliding part; 23. Driving cylinder; 24. Mounting limit seat; 25. Transmission gear; 26. Rack; 27. Connector; 28. Limit hole; 29. ​​Hollow limit groove; 3. Driving device; 31. Driving motor; 32. Screw rod; 33. Sliding block; 34. Ball screw; 4. Clamping assembly; 41. Mounting rod; 42. First fixing ring; 43. Second fixing ring; 44. First clamping rubber stick; 45. Second clamping rubber stick; 46. Elastic part; 5. First track; 6. Dust cover; 7. Second track. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0023] like Figures 1 to 5 As shown, this embodiment discloses a variable diameter clamp with adjustable spacing, including a fixed seat 1, on which are provided two clamp rod assemblies 2 arranged in pairs, one of the clamp rod assembly 2 is fixedly connected to the fixed seat 1, and the other of the clamp rod assembly 2 is slidably connected to the fixed seat 1; the fixed seat 1 is provided with a driving device 3 for driving the clamp rod assembly 2 to move; the clamp rod assembly 2 includes a mounting frame 21, in which are provided paired sliding members 22 and paired driving cylinders 23, and the driving cylinders 23 drive the sliding members 22 to move relative to the mounting frame 21; the sliding members 22 are provided with paired clamping assemblies 4, and the moving direction of the sliding members 22 is arranged perpendicular to the moving direction of the clamp rod assembly 2.

[0024] The drive device 3 includes a drive motor 31, a screw rod 32, and a slider 33. A pair of first rails 5 are provided within the fixed base 1, and the slider 33 is slidably mounted on the first rails 5. The drive motor 31 is fixedly mounted within the fixed base 1, and the screw rod 32 is rotatably connected to the fixed base 1. The distal end of the screw rod 32 is connected to the drive motor 31. The slider 33 is provided with a ball screw 34 fixedly connected thereto. The ball screw 34 is sleeved and mounted on the screw rod 32, and the ball screw 34 and the screw rod 32 are mutually engaged. When the drive motor 31 drives the screw rod 32 to rotate, the slider 33 moves relative to the fixed base 1. The end of the slider 33 facing away from the drive motor 31 is provided with a clamp rod assembly 2 fixedly connected thereto. A dust cover 6 is provided between the clamp rod assembly 2 and the fixed base 1.

[0025] Two said clamp rod assemblies 2 are distributed at the left and right ends of the fixed seat 1, and the clamp rod assembly 2 further comprises a mounting limiting seat 24, a transmission gear 25, a rack 26 and a connecting head 27; a pair of second rails 7 are arranged in the mounting frame 21, and the sliding piece 22 is slidingly installed on the second rail 7; the driving cylinder 23 is fixedly connected to the sliding piece 22, and the connecting head 27 is arranged on the piston shaft of the driving cylinder 23; the connecting head 27 is connected to the inner wall of the mounting frame 21; a pair of clamping assemblies 4 are arranged on the end face of the sliding piece 22, and the two clamping assemblies 4 are symmetrically arranged above and below. The bottom of the mounting frame 21 is provided with a mounting limiting seat 24 fixedly connected thereto, and the mounting limiting seat 24 is provided with a transmission gear 25 rotatably connected thereto; the rack 26 is fixedly connected to the sliding piece 22, and the two racks 26 on the clamp rod assemblies 2 are arranged on the two sides of the transmission gear 25, respectively. Each said rack 26 is arranged in parallel with the second rail 7; the mounting limiting seat 24 is provided with a limiting hole 28, and the rack 26 is inserted into the limiting hole 28; the hole diameter of the limiting hole 28 and the outer diameter of the rack 26 are matched with each other. The sliding piece 22 is provided with a hollow limiting groove 29, and the two sliding pieces 22 are arranged adjacent to each other, and the driving cylinder 23 is arranged on each sliding piece 22, and the cylinder body of the driving cylinder 23 is inserted into the hollow limiting groove 29 arranged adjacent thereto. The clamping assembly 4 comprises a mounting rod 41, a first fixed ring 42 and a second fixed ring 43; the mounting rod 41 is fixedly installed on the sliding piece 22; the first fixed ring 42 and the second fixed ring 43 are fixedly connected to the mounting rod 41, and the first fixed ring 42 is arranged at the end of the mounting rod 41, and the second fixed ring 43 is arranged opposite to the first fixed ring 42; the first clamping rubber rod 44 is arranged between the first fixed ring 42 and the second fixed ring 43, and the first clamping rubber rod 44 is sleeved on the mounting rod 41; the second clamping rubber rod 45 and the elastic member 46 are also sleeved on the mounting rod 41; the end of the second clamping rubber rod 45 abuts against the second fixed ring 43, one end of the elastic member 46 abuts against the sliding piece 22, and the other end of the elastic member 46 abuts against the second clamping rubber rod 45.

[0026] The specific operation of this embodiment is as follows: the two wheel hubs to be clamped and positioned are simultaneously transported to the vicinity of the clamp rod assembly 2, which activates the drive cylinder 23, thereby causing the clamping assembly 4 to clamp and secure the wheel hubs. When the drive cylinder 23 is activated, the piston shaft of the drive cylinder 23 is extended and retracted, and the connector 27 is connected to the mounting frame 21. When the drive cylinder 23 is activated, the slide 22 moves relative to the mounting frame 21 along the second track 7, thereby moving the clamping assemblies 4 closer to or farther from each other, thereby clamping or releasing the wheel hubs. By providing a transmission gear 25 and a rack 26, the two slides 22 move in sync, achieving good synchronization, allowing the clamping assembly 4 to precisely clamp the wheel hubs. The first clamping rubber rod 44 can rotate relative to the mounting rod, and the second clamping rubber rod 45 can rotate and extend relative to the mounting rod, so that the second clamping rubber rod 45 can extend and extend relative to the first clamping rubber rod 44. The two clamping assemblies 4 are close to each other, and the four first clamping rubber rods 44 abut against one end face of the wheel hub, and the four second clamping rubber rods 45 abut against the other end face of the wheel hub. The wheel hub is then clamped between the first clamping rubber rod 44 and the second clamping rubber rod 45. The first clamping rubber rod 44 and the second clamping rubber rod 45 cooperate with each other to achieve eight-point positioning, which has a good clamping effect and is reliable. Because the spacing between the two clamping assemblies 4 can be arbitrarily adjusted, wheel hubs of different sizes can be clamped.

[0027] In the actual blanking process, it is usually necessary to keep the center distance between the two wheel hubs consistent, so the center distance between the two wheel hubs is adjusted through the driving device 3 to facilitate the grabbing and placement of the wheel hubs on the next process; when the driving motor 31 is working, it drives the screw rod 32 to rotate, and when the screw rod 32 rotates, the slider 33 can move along the first track 5 relative to the fixed seat 1, and the slider 33 is fixedly connected to the clamp rod assembly 2, so that the two clamp rod assemblies 2 can move relative to each other; then the center distance between the two wheel hubs can be adjusted to adapt to wheel hubs of different sizes.

[0028] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A pitch-adjustable diameter-changing fixture, comprising a fixing seat (1), characterized in that: Two clamp rod assemblies (2) arranged in pairs are provided on the fixed seat (1), one of the clamp rod assembly (2) is fixedly connected to the fixed seat (1), and the other of the clamp rod assembly (2) is slidably connected to the fixed seat (1); a driving device (3) for driving the clamp rod assembly (2) to move is provided on the fixed seat (1); the clamp rod assembly (2) includes a mounting frame (21), wherein a pair of sliding members (22) and a pair of driving cylinders (23) are provided in the mounting frame (21), and the driving cylinders (23) drive the sliding members (22) to move relative to the mounting frame (21); a pair of clamping assemblies (4) are provided on the sliding members (22), and the moving direction of the sliding members (22) and the moving direction of the clamp rod assembly (2) are arranged perpendicular to each other.

2. The adjustable distance clamp according to claim 1, characterized in that: The driving device (3) comprises a driving motor (31), a screw rod (32) and a slider (33); a first track (5) arranged in pairs is provided in the fixed seat (1), and the slider (33) is slidably mounted on the first track (5); the driving motor (31) is fixedly mounted in the fixed seat (1), the screw rod (32) is rotatably connected to the fixed seat (1), and the end of the screw rod (32) is connected to the driving motor (31); a ball screw (34) fixedly connected to the slider (33) is provided, the ball screw (34) is sleeved and mounted on the screw rod (32), and the ball screw (34) and the screw rod (32) are meshed with each other; when the driving motor (31) drives the screw rod (32) to rotate, the slider (33) moves relative to the fixed seat (1).

3. The distance adjustable diameter clamp according to claim 2, characterized in that: The end of the slider (33) facing away from the drive motor (31) is provided with a clamp rod assembly (2) fixedly connected thereto; a dust cover (6) is provided between the clamp rod assembly (2) and the fixed seat (1).

4. The adjustable distance clamp according to claim 1, characterized in that: The two clamp rod assemblies (2) are distributed at the left and right ends of the fixed seat (1), and the clamp rod assembly (2) further includes a mounting limit seat (24), a transmission gear (25), a rack (26) and a connector (27); a second track (7) arranged in pairs is provided in the mounting frame (21), and the sliding member (22) is slidably mounted on the second track (7); a driving cylinder (23) fixedly connected to the sliding member (22) is provided on the sliding member (22), and a connector (27) is provided on the piston shaft of the driving cylinder (23), and the connector (27) is connected to the inner wall of the mounting frame (21); a clamping assembly (4) arranged in pairs is provided on the end surface of the sliding member (22), and the two clamping assemblies (4) are symmetrically arranged up and down.

5. The distance-adjustable diameter-changing fixture according to claim 4, characterized in that: The bottom of the mounting frame (21) is provided with a mounting limit seat (24) fixedly connected thereto, and a transmission gear (25) rotatably connected thereto is provided inside the mounting limit seat (24); the sliding member (22) is provided with a rack (26) fixedly connected thereto, and the clamp rod assemblies (2) are arranged in pairs, and the racks (26) on the two clamp rod assemblies (2) are respectively arranged on both sides of the transmission gear (25).

6. The distance-adjustable diameter-changing fixture according to claim 5, characterized in that: Each of the racks (26) and the second track (7) is arranged parallel to each other; a limiting hole (28) is provided on the mounting limiting seat (24), and the rack (26) is inserted into the limiting hole (28); the aperture of the limiting hole (28) is adapted to the outer diameter of the rack (26).

7. The distance-adjustable diameter-changing fixture according to claim 4, characterized in that: The sliding member (22) is provided with a hollow limiting groove (29), and the two sliding members (22) are arranged adjacent to each other. Each sliding member (22) is provided with a driving cylinder (23), and the cylinder body of the driving cylinder (23) is inserted into the hollow limiting groove (29) arranged adjacent to the sliding member (22).

8. The distance-adjustable diameter-changing fixture according to claim 1, characterized in that: The clamping assembly (4) comprises a mounting rod (41), a first fixing ring (42) and a second fixing ring (43); the mounting rod (41) is fixedly mounted on the sliding member (22); the mounting rod (41) is provided with a first fixing ring (42) and a second fixing ring (43) fixedly connected thereto, the first fixing ring (42) being arranged at the end of the mounting rod (41), and the second fixing ring (43) and the first fixing ring (42) being arranged opposite to each other; a first clamping rubber stick (44) is provided between the first fixing ring (42) and the second fixing ring (43), and the first clamping rubber stick (44) is sleeved and mounted on the mounting rod (41); a second clamping rubber stick (45) and an elastic member (46) are also sleeved and mounted on the mounting rod (41); the end of the second clamping rubber stick (45) rests on the second fixing ring (43), one end of the elastic member (46) rests on the sliding member (22), and the other end of the elastic member (46) rests on the second clamping rubber stick (45).

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