Machining device for nut ball return pipe of electric steering gear

Abstract

The utility model discloses a machining device for a nut ball return pipe of an electric steering gear, relates to the field of machining of nut ball return pipes, aims to solve the problems of lack of special clamps, complexity in assembly and disassembly during machining and low machining efficiency in the prior art, and adopts the technical scheme that the machining device comprises a bent plate, a positioning sleeve is detachably connected to the bent plate, and a positioning cavity is formed in the positioning sleeve; a locking rod is arranged in the positioning cavity in a penetrating mode, a pressing plate is in sliding contact with the locking rod, a locking piece is connected to the locking rod, the locking piece is in sliding contact or connection with the pressing plate, a first orientation mechanism is further arranged on the positioning cavity, and a second orientation mechanism is further arranged between the bent plate and the positioning sleeve. According to the technical scheme, the structure is simple, operation is convenient, rapid loading and unloading of workpieces can be achieved, and therefore machining efficiency is improved; and the second orientation mechanism can ensure that the assembling direction of the positioning sleeve is not changed, so that the machining precision of the workpiece is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of nut ball return tube processing, in particular to a nut ball return tube processing device for an electric steering gear. Background Art

[0002] The nut return ball tube is an important part of the screw system. During the processing of the nut return ball tube, it is necessary to Fig. 9 The workpiece blank shown in the figure is processed by drilling, milling, tapping, etc. to make it as shown in the figure. Fig.10 , Fig.11 The finished product shown in the figure lacks a special fixture for the nut return ball tube in the existing processing device. During processing, the nut return ball tube embryo is first positioned using the wire shaft, and the loading and unloading process is cumbersome and the processing efficiency is low. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a device for processing a nut and ball return tube of an electric steering gear, which can effectively solve the problems in the background technology.

[0004] In order to achieve the above-mentioned purpose, the utility model discloses a processing device for a nut ball return tube of an electric steering gear, the technical scheme adopted is that it includes a bent plate, a positioning sleeve is detachably connected to the bent plate, a positioning sleeve has a positioning cavity, a locking rod is penetrated in the positioning cavity, a pressure plate is slidably contacted on the locking rod, a locking piece is connected to the locking rod, the locking piece is in sliding contact with or connected to the pressure plate, and a first orientation mechanism is also provided on the positioning cavity, the first orientation mechanism is connected with both the inside and outside of the positioning cavity, and the nut ball return tube to be processed is loaded into the positioning cavity of the positioning sleeve, and primary positioning can be performed by the pressure plate and the locking piece, and then secondary positioning can be performed by the first orientation mechanism; a second orientation mechanism is also provided between the bent plate and the positioning sleeve, and the second orientation mechanism can perform secondary positioning on the positioning sleeve and the bent plate after the positioning sleeve is connected to the bent plate, so as to prevent the positioning sleeve from deflecting after long-term use, resulting in a decrease in processing accuracy.

[0005] As a preferred technical solution of the utility model, the bent plate has a vertical plate, a positioning hole is provided on the vertical plate, and bolt holes are arranged around the positioning hole; the positioning sleeve has a positioning part, the positioning part is connected to a fastening plate, a second threaded hole is provided on the fastening plate, the second threaded hole and the bolt hole are corresponding in position and size, the second threaded hole is a blind hole, and also includes a screw, the screw passes through the bolt hole and engages in the second threaded hole. The screw can fasten the positioning sleeve to the bent plate.

[0006] As a preferred technical solution of the utility model, the fastening plate is connected to a sleeve body, the sleeve body contains the positioning cavity, and the positioning cavity is a C-shaped cavity corresponding to the size and structure of the nut ball return tube; the fastening plate is provided with a third threaded hole, the locking rod is a screw rod, the screw rod is engaged in the third threaded hole, a locking piece is in sliding contact with the screw rod, the pressure plate is an open pressure plate, the locking piece is a nut, the nut is engaged with the screw rod, and the nut and the open pressure plate are in sliding contact. After the nut ball return tube is sleeved on the screw rod, the open pressure plate can be pressed against the nut ball return tube by screwing the nut to position the end face.

[0007] As a preferred technical solution of the utility model, a first pin hole is provided on the sleeve body, one end of the first pin hole is connected to the positioning cavity, and the other end is connected to the outside of the sleeve body, and the first pin hole is also connected to a first threaded hole, one end of the first threaded hole is meshed with the first pin hole, and the other end is connected to the end face of the sleeve body; the first orientation mechanism includes a positioning pin and a top screw, the positioning pin is slidably connected in the first pin hole, the top screw is meshed in the first threaded hole, and the end face of the top screw is in sliding contact with the positioning pin. The positioning cavity is entered from below through the positioning pin, and when the nut ball return tube is installed, the orientation groove of the nut ball return tube is aligned with the positioning pin, thereby ensuring the orientation accuracy of each processing and preventing the nut ball return tube from circumferential rotation during the processing.

[0008] As a preferred technical solution of the utility model, the fastening plate is further provided with a second pin hole, the bent plate is provided with a third pin hole, the second pin hole and the third pin hole are in corresponding positions and matched in size, and the second orientation mechanism comprises a cylindrical pin, and the cylindrical pin is in sliding contact in the second pin hole and the third pin hole. After the cylindrical pin is inserted into the second pin hole and the third pin hole, relative rotation between the positioning sleeve and the bent plate can be prevented.

[0009] Compared with the prior art, the utility model has the following beneficial effects: the utility model connects a locking rod to the positioning sleeve, and a pressure plate and a locking piece are connected to the locking rod. The locking piece enables the pressure plate to press the end face of the nut ball return tube to perform primary axial positioning, and a first orienting mechanism is provided on the positioning sleeve to achieve secondary circumferential positioning, thereby clamping the nut ball return tube. The technical solution has a simple structure and is easy to operate, and can achieve rapid loading and unloading of workpieces, thereby improving processing efficiency; and the second orienting mechanism can ensure that the assembly direction of the positioning sleeve remains unchanged, thereby ensuring the processing accuracy of the workpiece and keeping the processing positioning datum and design datum of the workpiece consistent. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of the utility model;

[0011] Figure 2 This is a left-side structural schematic diagram of the utility model;

[0012] Figure 3 This is a schematic diagram of the AA section structure of the utility model;

[0013] Figure 4 This is a schematic diagram of the cross-sectional structure of the bent plate of the utility model;

[0014] Figure 5 This is a schematic diagram of the cross-sectional structure of the positioning sleeve of the utility model;

[0015] Figure 6 This is a left-side structural schematic diagram of the positioning sleeve of the utility model;

[0016] Figure 7 This is a schematic diagram of the positioning pin structure of the utility model;

[0017] Figure 8 This is a schematic diagram of the structure of the opening pressure plate of the utility model;

[0018] Fig. 9 The workpiece embryo clamped by the utility model;

[0019] Fig.10 The finished product of the workpiece clamped by the utility model is shown in FIG. Figure 1 ;

[0020] Fig.11 The finished product of the workpiece clamped by the utility model is shown in FIG. Figure 2 .

[0021] In the figure: 1, bent plate; 101, positioning hole; 2, positioning sleeve; 201, positioning part; 202, fastening plate; 2021, third threaded hole; 203, sleeve body; 204, first pin hole; 205, first threaded hole; 206, second threaded hole; 207, second pin hole; 208, avoidance groove; 3, open pressure plate; 4, nut; 5, screw rod; 6, cylindrical pin; 7, screw; 8, positioning pin; 9, top screw; 10, workpiece; 1001, wheel body; 1002, tube body; 1003, gear ring; 1004, perforation; 1005, directional groove; 1006, processing surface; 1007, fourth threaded hole; 1008, processing hole; 1009, raceway. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example 1

[0023] like Fig. 9 As shown, the workpiece 10 to be processed includes a wheel body 1001, a tube body 1002 is provided on the end face of the wheel body 1001, a toothed ring 1003 is provided on the end face of the tube body 1002 away from the wheel body 1001, a through hole 1004 is provided at the axis of the wheel body 1001 and the tube body 1002, and an orientation groove 1005 is provided on the outer wall of the tube body 1002 along the direction of the tube body 1002, and the end of the orientation groove 1005 close to the toothed ring 1003 is connected to the end face of the tube body 1002.

[0024] like Figures 1 to 8 As shown, the utility model discloses an electric steering gear nut return ball tube processing device, which is used to clamp a workpiece 10 to process it into Fig.10 , Fig.11 In the structure shown, the finished workpiece 10 has a processing surface 1006 on the other side of the tube body 1002 opposite to the directional groove 1005, and a fourth threaded hole 1007 is provided on the processing surface 1006. There are processing holes 1008 on both sides of the processing surface 1006, and the two processing holes 1008 are connected through a raceway 1009. The adopted technical solution is to include a bent plate 1, which is an L-shaped structure, including a horizontal plate and a vertical plate, and the horizontal plate and the vertical plate are vertically connected, and there are reinforcing ribs between the outer side of the vertical plate and the horizontal plate. A positioning hole 101 is provided on the vertical plate, and a positioning sleeve 2 is inserted into the positioning hole 101. In order to connect the bent plate 1 and the positioning sleeve 2, bolt holes are also provided around the positioning hole 101, such as Figure 5 , Figure 6 As shown, the positioning sleeve 2 includes a fastening plate 202, a positioning portion 201 at one end of the fastening plate 202, and a sleeve body 203 at the other end. The positioning portion 201 is inserted into the positioning hole 101, and a second threaded hole 206 is opened on the fastening plate 202. The second threaded hole 206 corresponds to the bolt hole on the bent plate 1 in position and has a matching size. The second threaded hole 206 is a countersunk hole, and a screw 7 is then passed through the bolt hole to engage in the second threaded hole 206 to complete the connection between the bent plate 1 and the positioning sleeve 2. Considering the gap in the threaded connection, in order to prevent the positioning sleeve 2 from slightly offsetting relative to the bent plate 1 after long-term use, resulting in a decrease in machining accuracy, a third pin hole is opened on the vertical plate of the bent plate 1, and a second pin hole 207 is opened on the positioning sleeve 2. The second pin hole 207 corresponds to the third pin hole in position, and a cylindrical pin 6 is passed through the third pin hole and inserted into the second pin hole 207. The cylindrical pin 6 can prevent the positioning sleeve 2 from offsetting, thereby ensuring the machining accuracy. In order to facilitate the processing of the processing hole 1008 , an avoidance groove 208 is opened on the sleeve body 203 at a position corresponding to the processing hole 1008 .

[0025] There is a C-shaped positioning cavity on the positioning sleeve 2, and the top surface of the positioning cavity is a plane. The nut ball return tube to be processed can be inserted into the positioning cavity. Under the constraint of the positioning cavity, the nut ball return tube will move axially and rotate circumferentially. In order to complete the positioning of the nut ball return tube, a third threaded hole 2021 is opened on the fastening plate 202, and the third threaded hole 2021 is engaged with the screw rod 5, and the screw rod 5 slides and contacts the open pressure plate 3. The structure of the open pressure plate 3 is as shown in FIG. Figure 8 As shown, the main body of the open pressure plate 3 is a circular plate with a strip-shaped notch connected to the outside. A nut 4 is meshed on the screw rod 5. The nut 4 and the open pressure plate 3 are in sliding contact. The nut 4 is located on the side of the open pressure plate 3 away from the fastening plate 202. Screwing the nut 4 causes the open pressure plate 3 to press the end face of the nut return tube, which can axially position the nut return tube. The open pressure plate 3 uses a strip-shaped notch connected to the outside, so that the outer diameter of the nut 4 is smaller than the inner diameter of the through hole 1004 of the workpiece 10, so that the open pressure plate 3 and the workpiece 10 can be loaded and unloaded without completely disassembling the nut 4, thereby improving the processing efficiency.

[0026] In order to prevent the nut return tube from rotating circumferentially, Figure 3 , Figure 5 As shown, a longitudinal first pin hole 204 and a transverse first threaded hole 205 are provided at the bottom of the sleeve 203. One end of the first threaded hole 205 is connected to the first pin hole 204, and the other end is connected to the end surface of the sleeve 203. A positioning pin 8 is slidably connected in the first pin hole 204. The structure of the positioning pin 8 is as shown in FIG. Figure 7 As shown, a top screw 9 is engaged in the first threaded hole 205 , and the end surface of the top screw 9 is in sliding contact with the positioning pin 8 .

[0027] In order to further ensure the processing accuracy, the top surface of the vertical plate of the bent plate 1 is a horizontal alignment tape surface, and the top of the positioning sleeve 2 is a alignment plane flush with the vertical plate of the bent plate 1. After the positioning sleeve 2 is installed on the bent plate 1, the alignment tape surface of the bent plate 1 is coplanar with the alignment plane of the positioning sleeve 2.

[0028] The horizontal plate of the bent plate 1 is provided with fixing holes for installing the bent plate 1 .

[0029] The working principle of the utility model is as follows: the fixing bolt is passed through the fixing hole of the bent plate 1 and installed at the corresponding position of the processing equipment. The nut 4 is loosened, the open pressure plate 3 is removed, and the workpiece 10 to be processed is loaded into the positioning cavity of the sleeve 203. When loading, the gear ring 1003 is directed toward the vertical plate of the bent plate 1, the directional groove 1005 is aligned with the positioning pin 8, the screw rod 5 and the nut 4 pass through the through hole 1004, the top surface of the positioning pin 8 is connected with the bottom of the directional groove 1005, and the workpiece 10 is positioned circumferentially. The notch of the open pressure plate 3 is buckled toward the screw rod 5, so that the screw rod 5 enters the notch, and the nut 4 is screwed to make the open pressure plate 3 press the nut back to the end face of the ball tube for axial positioning, and the clamping of the workpiece 10 is completed.

[0030] The tube body 1002 is milled to form a processing surface 1006, which is flush with the upper plane of the positioning cavity on the sleeve body 203, and a fourth threaded hole 1007 is formed on the processing surface 1006, processing holes 1008 are formed on both sides of the processing surface 1006, and a raceway 1009 is formed between the two processing holes 1008. After the processing is completed, the nut 4 is screwed in the opposite direction, the opening pressure plate 3 is removed, and then the processed workpiece 10 is removed.

[0031] The circuits and mechanical connections involved in the present utility model are conventional means used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments, which belong to common knowledge.

[0032] Components not described in detail herein are prior art.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric steering gear nut return tube processing device, characterized in that: The invention comprises a bent plate (1), a positioning sleeve (2) being detachably connected to the bent plate (1), a positioning sleeve (2) being provided with a positioning cavity, a locking rod being inserted into the positioning cavity, a pressing plate being slidably contacted on the locking rod, a locking piece being connected to the locking rod, the locking piece being in slidable contact with or connected to the pressing plate, and a first orientation mechanism being provided on the positioning cavity; and a second orientation mechanism being provided between the bent plate (1) and the positioning sleeve (2).

2. The electric steering gear nut ball return tube processing device according to claim 1, characterized in that: The bent plate (1) has a vertical plate, a positioning hole (101) is formed on the vertical plate, and bolt holes are arranged around the positioning hole (101); the positioning sleeve (2) has a positioning portion (201), the positioning portion (201) is connected to a fastening plate (202), a second threaded hole (206) is formed on the fastening plate (202), the second threaded hole (206) and the bolt hole have corresponding positions and matching sizes, the second threaded hole (206) is a blind hole, and also includes a screw (7), the screw (7) passes through the bolt hole and is engaged in the second threaded hole (206).

3. The electric steering gear nut ball return tube processing device according to claim 2, characterized in that: The fastening plate (202) is connected to a sleeve (203), the sleeve (203) has a positioning cavity therein, and the positioning cavity is a C-shaped cavity; the fastening plate (202) is provided with a third threaded hole (2021), the locking rod is a screw rod (5), the screw rod (5) is engaged in the third threaded hole (2021), a locking piece is slidably contacted on the screw rod (5), the pressure plate is an open pressure plate (3), the locking piece is a nut (4), the nut (4) is engaged on the screw rod (5), and the nut (4) and the open pressure plate (3) are in slidably contact.

4. The electric steering gear nut ball return tube processing device according to claim 3, characterized in that: The sleeve (203) is provided with a first pin hole (204), one end of the first pin hole (204) is connected to the positioning cavity, and the other end is connected to the outside of the sleeve (203), and the first pin hole (204) is also connected to a first threaded hole (205), one end of the first threaded hole (205) is meshed with the first pin hole (204), and the other end is connected to the end face of the sleeve (203); the first orientation mechanism comprises a positioning pin (8) and a top screw (9), the positioning pin (8) is slidably connected in the first pin hole (204), the top screw (9) is meshed in the first threaded hole (205), and the end face of the top screw (9) is in sliding contact with the positioning pin (8).

5. The electric steering gear nut ball return tube processing device according to claim 2, characterized in that: The fastening plate (202) is also provided with a second pin hole (207), and the bending plate (1) is provided with a third pin hole, the second pin hole (207) and the third pin hole are corresponding in position and matched in size, and the second orientation mechanism comprises a cylindrical pin (6), and the cylindrical pin (6) is in sliding contact in the second pin hole (207) and the third pin hole.

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