Flexible clamp for machining steering rack

Abstract

The utility model relates to the technical field of steering systems, in particular to a flexible clamp for machining a steering rack. A flexible clamp for steering rack machining comprises a bottom plate, movable jaws, angle limiting mechanisms and end face positioning mechanisms, and is characterized in that a plurality of movable jaw mechanisms and the end face positioning mechanisms are evenly distributed on the bottom plate, and the angle limiting mechanisms are connected to the front end and the rear end of the bottom plate respectively; compared with the prior art, according to the flexible clamp for machining the steering rack, the angle can be adjusted through the angle limiting mechanism; the movable jaw mechanism and the end face positioning mechanism can be matched for production of various workpieces with different lengths, multiple products can be produced at a time, and the production cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of steering systems, in particular to a flexible clamp used for machining steering racks. Background Art

[0002] The rack in the steering system is a core component, and the rack grinding process is the core process. The grinding process requires a fixture to fix the workpiece. The design of the fixture must not only have a clamping function, but also take into account the rack tooth helix angle and length. According to past experience, a set of fixtures is required for each helix angle, and a set of fixtures is required for each 50mm change in rack length. As the types of workpiece tooth helix angles increase and the range of rack length changes, multiple sets of fixtures are required, which greatly increases manufacturing costs. Summary of the invention

[0003] The utility model overcomes the deficiencies of the prior art and provides a flexible clamp for steering rack processing, wherein the angle can be adjusted through an angle limiting mechanism; a variety of workpieces of different lengths can be produced through a movable jaw mechanism and an end face positioning mechanism, and multiple products can be produced at one time, thereby greatly reducing the production cost.

[0004] In order to achieve the above purpose, a flexible fixture for steering rack processing is designed, which includes a base plate, a movable jaw, an angle limiting mechanism, and an end surface positioning mechanism. The characteristics are as follows: a plurality of movable jaw mechanisms and end surface positioning mechanisms are evenly arranged on the base plate, and the front and rear ends of the base plate are respectively connected to the angle limiting mechanisms;

[0005] The movable jaw mechanism comprises a base, a horizontal positioning block, a front end stop block, a distance sensor, a clamping claw, a pull bar, and a positioning block. The bottom of the base is connected to the bottom plate, and the left and right sides of the upper part of the base are respectively provided with a horizontal positioning block and a pull bar, and the pull bar is connected to the clamping claw; the front end of the base is connected to the front end stop block, and the front end stop block is provided with a distance sensor; the rear end of the base is connected to the positioning block;

[0006] The end face positioning mechanism includes a rear end face rotating clamping block, a clamping block driving cylinder, an intermediate support seat, a tail support seat, and a length adjustment block. The bottom of the length adjustment block is connected to the base plate, the front end of the length adjustment block is connected to the intermediate support seat, the rear end of the length adjustment block is connected to the cylinder connecting plate, the upper part of the cylinder connecting plate is connected to the tail support seat, the bottom of the cylinder connecting plate is connected to the clamping block driving cylinder, and the driving shaft of the clamping block driving cylinder is connected to the rear end face rotating clamping block.

[0007] The angle limiting mechanism includes a moving block, an angle block, a pressing block, a front end angle reference block, a rear end angle reference block, and a jaw stop block. The front end of the base plate is connected to the moving block, the top of the moving block is connected to a plurality of jaw stop blocks, the bottom of the moving block is connected to the front end angle reference block, and one side of the front end angle reference block is provided with an angle block for calibrating different spiral angles; the rear end of the base plate is connected to the pressing block, and the rear end angle reference block is connected to the pressing block.

[0008] The bottom plate is laterally provided with a T-shaped slideway connecting the movable jaw and the end surface positioning mechanism, and a plurality of special-shaped hydraulic oil interfaces are arranged on the upper part of the bottom plate, which are connected to the oil circuit outlet on one side of the bottom plate through the oil circuit inside the bottom plate.

[0009] A pin hole for positioning and installing the movable jaw mechanism is arranged on the upper side of the special-shaped hydraulic oil interface.

[0010] The oil circuit outlet is connected to a plug.

[0011] The top of the rear end face rotating clamping block passes through the tail support seat and is located at the upper side of the tail support seat.

[0012] Compared with the prior art, the utility model provides a flexible clamp for steering rack processing, the angle of which can be adjusted through an angle limiting mechanism; through a movable jaw mechanism and an end face positioning mechanism, it can cooperate with the production of workpieces of various lengths, and can produce multiple products at one time, thereby greatly reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model.

[0014] Figure 2 It is a side view of the structure of the utility model.

[0015] Figure 3 This is a schematic diagram of the bottom plate structure of the utility model.

[0016] Figure 4 It is a schematic diagram of the movable jaw structure in the utility model.

[0017] Figure 5 It is a schematic diagram of the structure of the angle limiting mechanism in the utility model.

[0018] Figure 6 It is a schematic diagram of the structure of the end surface positioning mechanism in the utility model. DETAILED DESCRIPTION

[0019] The utility model is further described below with reference to the accompanying drawings.

[0020] The existing gear grinding fixture is non-angle-adjustable and can only produce products with a single helix angle and racks with a length of 700-750mm. In addition, the fixture cost is high. If a set of fixtures is used for each helix angle, it will bring extremely high costs.

[0021] In order to solve the above technical problems, the following technical solutions are adopted:

[0022] like Figures 1 to 6 As shown, a plurality of movable jaw mechanisms 2 and end surface positioning mechanisms 4 are evenly distributed on the bottom plate 1, and the front and rear ends of the bottom plate 1 are respectively connected to angle limiting mechanisms 3;

[0023] The movable jaw mechanism 2 includes a base, a horizontal positioning block, a front end stop block, a distance sensor, a clamping claw, a pull rod, and a positioning block. The bottom of the base 9 is connected to the bottom plate 1. The left and right sides of the upper part of the base 9 are respectively provided with a horizontal positioning block 10 and a pull rod 14, and the pull rod 14 is connected to the clamping claw 12; the front end of the base 9 is connected to the front end stop block 11, and the front end stop block 11 is provided with a distance sensor 13; the rear end of the base 9 is connected to the positioning block 15;

[0024] The end face positioning mechanism 4 includes a rear end face rotating clamping block, a clamping block driving cylinder, an intermediate support seat, a tail support seat, and a length adjustment block. The bottom of the length adjustment block 26 is connected to the base plate 1, the front end of the length adjustment block 26 is connected to the intermediate support seat 24, the rear end of the length adjustment block 26 is connected to the cylinder connecting plate 27, the upper part of the cylinder connecting plate 27 is connected to the tail support seat 25, the bottom of the cylinder connecting plate 27 is connected to the clamping block driving cylinder 23, and the driving shaft of the clamping block driving cylinder 23 is connected to the rear end face rotating clamping block 22.

[0025] The angle limiting mechanism 3 includes a moving block, an angle block, a pressing block, a front end angle reference block, a rear end angle reference block, and a jaw stop block. The front end of the base plate 1 is connected to the moving block 16, the top of the moving block 16 is connected to a plurality of jaw stop blocks 21, the bottom of the moving block 16 is connected to the front end angle reference block 19, and one side of the front end angle reference block 19 is provided with an angle block 17 for calibrating different spiral angles; the rear end of the base plate 1 is connected to the pressing block 18, and the rear end angle reference block 20 is connected to the pressing block 18.

[0026] A T-shaped slide groove 8 connecting the movable jaw 2 and the end surface positioning mechanism 4 is horizontally provided on the base plate 1, and a plurality of special-shaped hydraulic oil interfaces 7 are provided on the upper part of the base plate 1. The special-shaped hydraulic oil interfaces 7 are connected to the oil circuit outlet 6 on one side of the base plate 1 through the oil circuit inside the base plate 1.

[0027] A pin hole 5 for positioning and mounting the movable jaw mechanism 2 is provided on the upper side of the special-shaped hydraulic oil interface 7 .

[0028] The oil outlet 6 is connected to a plug.

[0029] The top of the rear end surface rotation clamping block 22 passes through the tail support seat 25 and is located at the upper side of the tail support seat 25 .

[0030] The bottom plate 1 is the base of the entire clamp, including a pin hole 5 for positioning and installing the movable jaw mechanism 2, an oil outlet 6, a special-shaped hydraulic oil interface 7 connected to the movable jaw mechanism 2, and a T-shaped slide groove 8 for the movable jaw mechanism 2.

[0031] The function of the movable jaw mechanism 2 is to support and clamp the workpiece 28, including a horizontal positioning block 10 for placing the workpiece, a front end stop block 11, a clamping jaw 12 for radially clamping the workpiece, a distance sensor 13 for detecting whether the front end surface of the workpiece is in place, a pull rod 14 used to fully open the clamping jaw 12, and a rear end connection positioning block 15 used to adjust the angle.

[0032] The angle limiting mechanism 3 is used for angle calibration, and includes a movable block 16 installed with the base plate 1, an angle block 17 for calibrating different helix angles, a front end angle reference block 19 and a rear end angle reference block 20, a pressing block 18 for fixing the rear end angle reference block 20, and a jaw stop 21 for limiting the movable jaw mechanism 2.

[0033] The end face limiting mechanism 4 is used for supporting the tail of the workpiece 28, clamping the rear end face and adjusting the length, and includes a rear end face rotating clamping block 22, a clamping block driving cylinder 23, an intermediate support seat 24, a tail support seat 25 and a length adjustment block 26.

[0034] Working principle and process of the utility model clamp:

[0035] The workpiece 28 is placed on the horizontal positioning block 10 on the movable jaw mechanism 2, and the front end face of the workpiece 28 is pushed until it contacts the front end stop block 11. The rear end face rotating clamping block 22 clamps the rear end face of the workpiece 28 under the drive of the clamping block driving cylinder 23. At the same time, the distance sensor 13 detects whether the workpiece 28 is completely in close contact with the front end face.

[0036] The clamping jaws 12 on the movable jaw mechanism 2 are driven by the hydraulic oil circuit in the oil circuit outlet 6 to turn over and clamp the workpiece 28 in the radial direction.

[0037] After the processing is completed, the hydraulic oil circuit is reset, and the reset pull bar 14 pulls the clamping jaws 12 to a fully open state, at which time the workpiece 28 can be taken out.

[0038] Angle adjustment:

[0039] Each helix angle has a Figure 5 The angle block 17 in the figure takes the front angle reference block 19 as the zero point. The position of the moving block 16 is adjusted by the angle block 17. After the moving block 16 is tightened, the angle limit mechanism 3 is locked.

[0040] Move the movable jaw mechanism 2 so that Figure 4 The rear end connection positioning block 15 and Figure 4 The jaw stop block 21 is tightly attached to the movable jaw mechanism 2, and the bolts on the T-shaped slide groove 8 are locked.

[0041] Length adjustment: according to the length of the workpiece, adjust Figure 6 The length adjustment block 26 in the Figure 5 The rear end face of the clamping block 22 can be rotated to contact the rear end face of the workpiece 28, and then the length adjustment block 26 is locked.

Claims

1. A flexible fixture for steering rack machining, comprising a base plate, a movable jaw, an angle limiting mechanism, and an end surface positioning mechanism, characterized in that: A plurality of movable jaw mechanisms (2) and end surface positioning mechanisms (4) are evenly distributed on the bottom plate (1), and the front and rear ends of the bottom plate (1) are respectively connected to angle limiting mechanisms (3); The movable jaw mechanism (2) comprises a base, a horizontal positioning block, a front end stop block, a distance sensor, a clamping claw, a pull bar, and a positioning block. The bottom of the base (9) is connected to the bottom plate (1). The left and right sides of the upper part of the base (9) are respectively provided with a horizontal positioning block (10) and a pull bar (14), and the pull bar (14) is connected to the clamping claw (12); the front end of the base (9) is connected to the front end stop block (11), and the front end stop block (11) is provided with a distance sensor (13); the rear end of the base (9) is connected to the positioning block (15); The end face positioning mechanism (4) comprises a rear end face rotating clamping block, a clamping block driving cylinder, an intermediate support seat, a tail support seat, and a length adjustment block. The bottom of the length adjustment block (26) is connected to the bottom plate (1), the front end of the length adjustment block (26) is connected to the intermediate support seat (24), the rear end of the length adjustment block (26) is connected to the cylinder connecting plate (27), the upper part of the cylinder connecting plate (27) is connected to the tail support seat (25), the bottom of the cylinder connecting plate (27) is connected to the clamping block driving cylinder (23), and the driving shaft of the clamping block driving cylinder (23) is connected to the rear end face rotating clamping block (22).

2. A flexible fixture for steering rack machining according to claim 1, characterized in that: The angle limiting mechanism (3) comprises a moving block, an angle block, a pressing block, a front end angle reference block, a rear end angle reference block, and a jaw stop block. The front end of the base plate (1) is connected to the moving block (16), the top of the moving block (16) is connected to a plurality of jaw stop blocks (21), the bottom of the moving block (16) is connected to the front end angle reference block (19), and one side of the front end angle reference block (19) is provided with an angle block (17) for calibrating different helical angles; the rear end of the base plate (1) is connected to the pressing block (18), and the pressing block (18) is connected to the rear end angle reference block (20).

3. The flexible fixture for steering rack machining according to claim 1, characterized in that: The bottom plate (1) is laterally provided with a T-shaped slide groove (8) for connecting the movable jaw mechanism (2) and the end surface positioning mechanism (4), and a plurality of special-shaped hydraulic oil interfaces (7) are provided on the upper part of the bottom plate (1). The special-shaped hydraulic oil interfaces (7) are connected to the oil circuit outlet (6) on one side of the bottom plate (1) through the oil circuit inside the bottom plate (1).

4. The flexible fixture for steering rack machining according to claim 3, characterized in that: A pin hole (5) for positioning and mounting the movable jaw mechanism (2) is provided on the upper side of the special-shaped hydraulic oil interface (7).

5. The flexible fixture for steering rack machining according to claim 3, characterized in that: The oil circuit outlet (6) is connected to a plug.

6. The flexible fixture for steering rack machining according to claim 1, characterized in that: The top of the rear end face rotating clamping block (22) passes through the tail support seat (25) and is located at the upper side of the tail support seat (25).

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