Horizontal press-fitting device

Abstract

The utility model discloses a horizontal type press-fitting device which comprises a left fixing plate, a guide column, a right fixing plate and a bottom plate, the left fixing plate, the guide column, the right fixing plate and the bottom plate form a double-shaft horizontal type rigid structure, the guide column is connected with a left jig assembly, a right jig assembly and a servo sliding table, and the right side of the right jig assembly is connected with a servo electric cylinder. The left jig assembly, the right jig assembly and the servo sliding table are coaxially matched to form a workpiece press-fitting area, and the left fixing plate is provided with a pressure sensor. According to the press-fitting device, horizontal press-fitting and relative vertical press-fitting are achieved, jig design is simplified, jig universality and adjustability are improved, the situation that a large number of jigs used for being matched with various workpieces need to be designed like vertical press-fitting is avoided, the number of parts needed by the press-fitting device is reduced, and press-fitting reliability and stability are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of assembly equipment, in particular to a horizontal press-fitting device. Background Art

[0002] Most of the existing motor press-fitting in the industry, such as rotor shaft pressing, commutator pressing, bearing pressing, etc., adopt vertical press-fitting. It is mainly composed of a stand, an upper die, and a lower die. The upper die or the lower die contains a workpiece guide structure, and some also contain a mechanical self-reset structure. Different motors will have a large number of similar jigs according to the corresponding processes, resulting in complex structures and high manufacturing costs. A large number of jigs take up a lot of space and are difficult to manage.

[0003] During press-fitting, the workpiece is ensured to be coaxial by the guide structure. The workpiece and the guide structure are in constant contact and have relative motion. The workpiece or the guide structure is very easy to be scratched, which will affect the press-fitting accuracy. The longer the workpiece, the longer the guide structure needs to be. When the workpiece exceeds a certain length, the guide structure is very difficult to process.

[0004] Conventional presses place the sensor in front of the pressure head and install it vertically. Due to the weight of the sensor, the sensor often drifts to zero, resulting in inaccurate accuracy. Since the sensor is located at the pressure head, the sensor cable will move up and down with the pressure head every time it is pressed, which makes the sensor cable easily damaged and causes sensor failure.

[0005] Therefore, it is necessary to improve the press-fitting type, workpiece movement method, and sensor installation method. Summary of the invention

[0006] The utility model provides a new horizontal press-fitting device to solve the defects in the prior art, such as too many vertical press-fitting jigs, easy scratches on workpieces, and easy damage to sensor cables.

[0007] In order to solve the above technical problems, the utility model is implemented through the following technical solutions:

[0008] A horizontal press-fitting device comprises a left fixed plate, a guide column, a right fixed plate, and a bottom plate, wherein the left fixed plate and the right fixed plate are fixed on the bottom plate, the guide column is fixed between the left fixed plate and the right fixed plate, the left fixed plate, the guide column, the right fixed plate, and the bottom plate form a double-axis horizontal rigid structure, the guide column is connected to a left jig assembly, a right jig assembly, and a servo slide, the right side of the right jig assembly is connected to a servo electric cylinder, the servo electric cylinder is fixedly connected to the right fixed plate and the bottom plate respectively, the left jig assembly, the right jig assembly, and the servo slide are coaxially matched to form a workpiece press-fitting area, the left fixed plate is provided with a pressure sensor, and the pressure sensor is connected to the left jig assembly.

[0009] The left fixed plate, guide column, right fixed plate and bottom plate constitute the main frame, forming a double-axis horizontal rigid structure. Double axis refers to the two movement direction axes formed by the motor part of the servo electric cylinder and the servo slide. Horizontal refers to lateral press-fitting, which is opposite to vertical press-fitting. The guide column plays a guiding and fixing role, and is used for the sliding connection of the left fixture assembly, the right fixture assembly and the servo slide to ensure the coaxiality of the press-fitting. The left fixture assembly, the right fixture assembly and the servo slide are used to cooperate to achieve horizontal press-fitting. The workpiece press-fitting area is used to place the workpiece for press-fitting. The left fixture assembly and the right fixture assembly are both used to place the workpiece for double-end press-fitting. The servo slide is used to assist in supporting the workpiece and ensure the coaxiality during press-fitting. The pressure sensor is fixed on the left fixed plate to avoid repeated movement of the pressure sensor.

[0010] The utility model realizes horizontal press-fitting, which is relatively vertical press-fitting, simplifies the fixture design, improves the versatility and adjustability of the fixture, avoids the need to design a large number of fixtures for matching various workpieces like vertical press-fitting, and also reduces the number of parts required for the press-fitting device, thereby improving the reliability and stability of the press-fitting. The utility model ensures coaxiality through a servo slide, and the servo slide moves with the workpiece, and relatively vertical press-fitting avoids scratches caused by the relative movement of the workpiece and the guide structure. The utility model fixes the pressure sensor on the left fixed plate, and relatively vertical press-fitting avoids damage to the sensor cable caused by the up and down movement of the pressure head. At the same time, due to the fixed structure of the utility model, the pressure sensor has no relative force in the static state, and zero drift is avoided. Through the above-mentioned design, the utility model reduces the defective rate and labor intensity of press-fitting, reduces costs and increases efficiency. The utility model is not only used for press-fitting bearings, but also can be used for pressing rotor shafts, commutators, fan blades, etc., and is not limited to the motor industry.

[0011] Preferably, in the above-mentioned horizontal press-fitting device, the number of the guide pillars is 4, and the guide pillars are distributed in parallel at the four corner areas of the left fixed plate and the right fixed plate.

[0012] There are 4 guide pillars, which takes into account both cost and structural strength. The parallel distribution ensures the guiding effect. The four corner areas refer to the four corner edge areas of the rectangular four corners of the left and right fixed plates. The guide pillars are distributed in the four corner areas, freeing up a larger internal space, which is more conducive to the setting of the left fixture assembly, the right fixture assembly, and the servo slide.

[0013] Preferably, in the above-mentioned horizontal press-fitting device, the left fixture assembly comprises a floating plate and a left fixture part, the left fixture part is fixed to the floating plate, and the floating plate is slidably connected to the guide column.

[0014] The floating plate is used to slide along the guide column. During press-fitting, the left fixture part is subjected to pressure, and the floating plate follows the left fixture part to produce corresponding displacement, thereby avoiding affecting the detection accuracy of the press-fitting pressure.

[0015] Preferably, in the above-mentioned horizontal press-fitting device, a connecting plate is provided on the pressure sensor, the connecting plate is fixed to the floating plate, and the left fixture part is fixed to the connecting plate.

[0016] The pressure sensor is fixed on the left fixed plate. During press-fitting, the left fixture part drives the connecting plate, and the connecting plate drives the pressure sensor, thereby realizing accurate pressure detection of the fixed pressure sensor.

[0017] Preferably, in the above-described horizontal press-fitting device, the right fixture assembly comprises a push plate and a right fixture part, the right fixture part is fixed to the push plate, the push plate is slidably connected to the guide column, and the right fixture part is transmission-connected to the servo electric cylinder.

[0018] The push plate is used to slide along the guide column, the servo electric cylinder pushes the right fixture part, and the push plate slides along the guide column to ensure the coaxiality of the right fixture part.

[0019] Preferably, in the above-described horizontal press-fitting device, the servo slide comprises a slide part and a motor part, the slide part is transmission-connected with the motor part, the motor part is fixed to the right fixed plate, and the slide part is slidably connected with the guide column.

[0020] The slide is used to assist in supporting the workpiece and ensure the coaxiality during press-fitting. The motor is used to drive the slide to move. The guide column ensures the coaxiality of the slide. During press-fitting, the slide moves with the workpiece to avoid scratches caused by relative movement with the workpiece.

[0021] Preferably, in the above-mentioned horizontal press-fitting device, a workpiece support is provided on the slide portion, and the workpiece support is movably connected to the slide portion.

[0022] The workpiece support plays an auxiliary supporting role, holding up the workpiece and ensuring the coaxiality during press-fitting. The workpiece support is movably connected and can be freely adjusted on the slide to accommodate more workpieces.

[0023] Preferably, in the above-mentioned horizontal press-fitting device, the number of the workpiece supports is 2, and the workpiece supports are planar thin plate support structures.

[0024] The number of workpiece supports is 2, taking into account both cost and support effect. The flat thin plate support structure is a sheet structure, which is more conducive to processing while ensuring the support effect. It can be quickly manufactured by laser cutting, water cutting or wire cutting, thereby reducing costs.

[0025] Preferably, in the above-described horizontal press-fitting device, the left fixture assembly and the right fixture assembly are both hole-shaft clearance fit connection structures.

[0026] The left and right jig parts are connected to the floating plate and the push plate through the hole-shaft clearance matching connection structure. The hole-shaft clearance has a holding force for the fixation of the left and right jig parts, which can offset the deadweight of the jig and the workpiece, thereby avoiding the use of vertical press-fit magnets or other fastening devices, making the jig simpler and more reliable.

[0027] Preferably, in the above-mentioned horizontal press-fitting device, the stop size of the left fixture component is the same as the stop size of the right fixture component.

[0028] The stop sizes of the left and right fixture parts are the same, which improves versatility and makes model change more convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the structure of the utility model;

[0030] Figure 2 It is a cross-sectional schematic diagram of the utility model;

[0031] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0032] Figure 4 It is a reference diagram of the existing vertical press-fit structure;

[0033] Figure 5 A partial explosion diagram of the slide portion in the utility model;

[0034] Figure 6 A partial cross-sectional schematic diagram of the slide portion of the utility model;

[0035] Figure 7 This is a reference diagram of the sensor structure of the existing vertical press-fit structure. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-7 The present invention is further described in detail with the following specific embodiments, but they are not intended to limit the present invention:

[0037] Example 1

[0038] A horizontal press-fitting device comprises a left fixed plate 1, a guide column 2, a right fixed plate 3, and a bottom plate 4, wherein the left fixed plate 1 and the right fixed plate 3 are fixed on the bottom plate 4, the guide column 2 is fixed between the left fixed plate 1 and the right fixed plate 3, the left fixed plate 1, the guide column 2, the right fixed plate 3, and the bottom plate 4 form a double-axis horizontal rigid structure, the guide column 2 is connected to a left fixture assembly 5, a right fixture assembly 6, and a servo slide 7, the right side of the right fixture assembly 6 is connected to a servo electric cylinder 61, the servo electric cylinder 61 is fixedly connected to the right fixed plate 3 and the bottom plate 4 respectively, the left fixture assembly 5, the right fixture assembly 6, and the servo slide 7 are coaxially matched to form a workpiece press-fitting area, the left fixed plate 1 is provided with a pressure sensor 51, and the pressure sensor 51 is connected to the left fixture assembly 5.

[0039] Preferably, the number of the guide pillars 2 is four, and the guide pillars 2 are distributed in parallel at the four corners of the left fixing plate 1 and the right fixing plate 3 .

[0040] Preferably, the left fixture assembly 5 includes a floating plate 52 and a left fixture portion 53 , wherein the left fixture portion 53 is fixed to the floating plate 52 , and the floating plate 52 is slidably connected to the guide column 2 .

[0041] Preferably, a connecting plate 54 is provided on the pressure sensor 51 , the connecting plate 54 is fixed to the floating plate 52 , and the left fixture part 53 is fixed to the connecting plate 54 .

[0042] Preferably, the right jig assembly 6 includes a push plate 62 and a right jig part 63 , wherein the right jig part 63 is fixed to the push plate 62 , the push plate 62 is slidably connected to the guide column 2 , and the right jig part 63 is transmission-connected to the servo electric cylinder 61 .

[0043] Preferably, the servo slide 7 includes a slide portion 71 and a motor portion 72 , the slide portion 71 is transmission-connected to the motor portion 72 , the motor portion 72 is fixed to the right fixed plate 3 , and the slide portion 71 is slidably connected to the guide column 2 .

[0044] Preferably, a workpiece support 73 is provided on the slide portion 71 , and the workpiece support 73 is movably connected to the slide portion 71 .

[0045] Preferably, the number of the workpiece supports 73 is 2, and the workpiece supports 73 are planar thin plate support structures.

[0046] Preferably, the left fixture assembly 5 and the right fixture assembly 6 are both hole-shaft clearance fit connection structures.

[0047] Preferably, the stop size of the left jig assembly 5 is the same as the stop size of the right jig assembly 6 .

[0048] like Figure 1-2 As shown, in the double-axis horizontal rigid structure, the two moving direction axes formed by the servo electric cylinder 61 and the motor part 72 of the servo slide 7 are arranged in parallel to ensure coaxiality. The guide column 2 passes through the floating plate 52 and the push plate 62. The push rod of the servo electric cylinder 61 is fixedly connected to the push plate 62. The floating plate 52 and the push plate 62 are both provided with concentric circles that maintain relative positions with the guide column 2, and the two concentric circles are used to fix the left fixture part 53 and the right fixture part 63 respectively. The guide column 2 passes through the front and rear sides of the slide part 71, and the slide part 71 is driven by the screw of the motor part 72. Two workpiece supports 73 are located on the left and right sides of the slide part 71, and the up, down, left and right positions of the workpiece supports 73 can be adjusted. The workpiece support 73 holds up the workpiece to ensure that the center of the workpiece is concentric with the concentric circles of the floating plate 52 and the push plate 62. The left fixture part 53 and the right fixture part 63 both adopt a hole-shaft clearance matching connection structure, and only one auxiliary positioning screw is required for auxiliary fixing.

[0049] The servo cylinder 61 sets the external maximum torque through 485, DA, bus or other communication methods, thereby limiting the maximum output thrust. The control system compares the set thrust value with the actual thrust value detected by the pressure sensor 51, and corrects it by reading the table, interpolation, etc., so that the actual thrust value ≤ the set thrust value, and the error is <5%, ensuring that the workpiece will not be damaged due to the pressure exceeding the setting during the entire press-fitting process.

[0050] The vertical press-fitting device usually adopts the positioning mode to achieve the purpose of precise positioning. When the press-fitting speed is relatively fast, the sensor just detects that the pressure exceeds the set value, and then the actual pressure may be several times or even dozens of times higher than the set value, resulting in excessive pressure and damage to the workpiece.

[0051] The servo slide 7 and the servo electric cylinder 61 are independent of each other. The servo slide 7 can be set to multiple positions and operation modes according to the pressing requirements. It can run synchronously, asynchronously or independently with the servo electric cylinder 61. The slide 71 stops at any suitable position within the working range, which is convenient for quick removal of workpieces. Figure 3 As shown, the connecting plate 54 is fastened to the detection end of the pressure sensor 51 by bolts, and the left fixture part 53 is fixed to the connecting plate 54 by a hole-shaft clearance fitting connection structure and an auxiliary positioning screw.

[0052] During double-end press-fitting, the slide 71 first moves to a suitable position close to the left fixture 53 and stops. The left fixture 53, the slide 71, and the right fixture 63 place the workpiece and the assembly parts, and then wait for the push plate 62 and the right fixture 63 to move toward the left fixture 53. When the workpiece and the assembly parts are about to contact for press-fitting, the slide 71 and the servo cylinder 61 operate synchronously until the press-fitting is completed. There is no relative movement between the slide 71 and the workpiece. After the press-fitting is completed, the slide 71 and the servo cylinder 61 are reset.

[0053] During single-end press-fitting, only the left fixture part 53 and the slide part 71 are needed to place the workpiece and the assembled parts, and the right fixture part 63 on the other side can be used with a universal press head for press-fitting.

[0054] like Figure 4 As shown, in the existing vertical press-fitting structure, the stand 100 is the main structure, a magnet 102 is provided on the lower side of the upper die 101 to attract the bearing to prevent it from falling, and a workpiece guide structure 103 in the lower die 105 is used to guide the vertical workpiece 104 when it is press-fitted.

[0055] like Figure 5-6 As shown, the workpiece support 73 includes a left support plate 731 and a right support plate 732 , and the left support plate 731 and the right support plate 732 are movably connected to the left and right sides of the slide base plate 712 of the slide portion 71 , and the guide column 2 is slidably connected to the front and rear sides of the slide base plate 712 .

[0056] The slide portion 71 further includes a left slide plate 700 and a right slide plate 701, which are slidably connected to the left and right sides of the slide base plate 712, a left support plate 731 connected to the left slide plate 700, and a right support plate 732 connected to the right slide plate 701. The slide base plate 712 is provided with a base plate slot 702, in which the left slide plate 700 and the right slide plate 701 are slidably connected. The left slide plate 700 and the right slide plate 701 are provided with a slide plate slot 703, in which the left support plate 731 and the right support plate 732 are slidably connected.

[0057] The left support plate 731 and the right support plate 732 are provided with support plate waist-shaped holes 704, and the sliding plate slot 703 is provided with support plate fixing holes 705, and the support plate waist-shaped holes 704 and the support plate fixing holes 705 are matched. The slide base plate 712 is provided with a base plate waist-shaped hole 706, and a T-shaped nut 707 is provided on the lower side of the base plate waist-shaped hole 706. The left sliding plate 700 and the right sliding plate 701 are provided with a base plate fixing hole 708, and the base plate fixing hole 708, the base plate waist-shaped hole 706, and the T-shaped nut 707 are matched. Linear bearings 709 are provided on the front and rear sides below the slide base plate 712, and the linear bearings 709 are slidably connected with the guide column 2. A screw rod 710 is provided between the guide columns 2, and a screw rod bearing 711 is provided below the slide base plate 712, and the screw rod 710 is transmission-connected with the screw rod bearing 711. The front and rear sides of the left sliding plate 700 and the right sliding plate 701 are both T-shaped structures. The T-shaped structure takes into account both structural strength and cost. The T-shaped structure is also conducive to the installation of the left sliding plate 700 and the right sliding plate 701 on the bottom plate slot 702.

[0058] The waist-shaped hole 704 of the support plate is connected to the fixing hole 705 of the support plate by screws, and the fixing hole 708 of the bottom plate, the waist-shaped hole 706 of the bottom plate, and the T-nut 707 are connected by screws. The waist-shaped direction of the waist-shaped hole 704 of the support plate is up and down, and the waist-shaped direction of the waist-shaped hole 706 of the bottom plate is left and right. A T-slot is provided on the lower side of the waist-shaped hole 706 of the bottom plate, and the T-nut 707 is slidably connected in the T-slot. The left support plate 731 and the right support plate 732 adopt a large and small card slot and an inner and outer card slot structure, and can be arbitrarily installed on the left and right surfaces of the left sliding plate 700 and the right sliding plate 701 through the sliding plate card slot 703. The left support plate 731 and the right support plate 732 are adjusted up and down and left and right through the left sliding plate 700 and the right sliding plate 701, and are synchronized with the workpiece when the workpiece is pressed through the sliding table bottom plate 712, the screw rod 710, and the screw rod bearing 711.

[0059] Through the above design, the left support plate 731 and the right support plate 732 can move up and down, left and right, and are compatible with workpieces of more lengths and shapes, and can ensure coaxiality. The support plate fixing hole 705 can move up and down along the support plate waist-shaped hole 704. The bottom plate fixing hole 708 and the T-nut 707 can move left and right along the bottom plate waist-shaped hole 706.

[0060] When the slide part 71 is changed, it is only necessary to loosen the screws to adjust the position, or directly replace the more suitable left support plate 731 and right support plate 732, or directly replace the entire left sliding plate 700 and right sliding plate 701 assembly.

[0061] The floating plate 52 and the push plate 62 are provided with floating plate linear bearings and push plate linear bearings for sliding connection with the guide column 2. The sensor cable of the pressure sensor 51 is located between the floating plate 52 and the left fixed plate 1, and will not move back and forth or touch other components, thereby avoiding damage and improving the service life of the pressure sensor 51.

[0062] like Figure 7 As shown, during vertical press-fitting, the electric cylinder push rod 107 pushes the pressure head 109 for press-fitting, and the existing sensor 108 detects the pressure on the pressure head 109. The existing cable 106 moves up and down with the existing sensor 108, which is very easy to cause damage. When not press-fitting, the existing sensor 108 is affected by gravity and is prone to zero drift.

[0063] When the utility model is horizontally pressed, the left fixture part 53 is subjected to force, which is transmitted to the connecting plate 54, and the floating plate 52 follows the connecting plate 54 to be subjected to force and slides, so that the pressure sensor 51 obtains an accurate pressure value. The pressure sensor 51 has no relative force in the lateral direction, and the pressure value is more accurate, and zero drift will not occur.

[0064] In conclusion, the above is only a preferred embodiment of the present invention, and all equivalent changes and modifications made within the scope of the patent application for the present invention should fall within the scope of the present invention.

Claims

1. A horizontal press-fitting device, characterized in that: The invention comprises a left fixed plate (1), a guide column (2), a right fixed plate (3), and a bottom plate (4); the left fixed plate (1) and the right fixed plate (3) are fixed on the bottom plate (4); the guide column (2) is fixed between the left fixed plate (1) and the right fixed plate (3); the left fixed plate (1), the guide column (2), the right fixed plate (3), and the bottom plate (4) form a double-axis horizontal rigid structure; the guide column (2) is connected to a left fixture component (5) and a right fixture component (6), a servo slide (7), the right side of the right fixture assembly (6) is connected to a servo electric cylinder (61), the servo electric cylinder (61) is fixedly connected to the right fixed plate (3) and the bottom plate (4), respectively, the left fixture assembly (5), the right fixture assembly (6), and the servo slide (7) are coaxially matched to form a workpiece pressing area, the left fixed plate (1) is provided with a pressure sensor (51), and the pressure sensor (51) is connected to the left fixture assembly (5).

2. A horizontal press-fitting device according to claim 1, characterized in that: The number of the guide pillars (2) is four, and the guide pillars (2) are distributed in parallel at the four corners of the left fixing plate (1) and the right fixing plate (3).

3. A horizontal press-fitting device according to claim 1, characterized in that: The left fixture assembly (5) comprises a floating plate (52) and a left fixture part (53), wherein the left fixture part (53) is fixed to the floating plate (52), and the floating plate (52) is slidably connected to the guide column (2).

4. A horizontal press-fitting device according to claim 3, characterized in that: The pressure sensor (51) is provided with a connecting plate (54), the connecting plate (54) is fixed to the floating plate (52), and the left fixture part (53) is fixed to the connecting plate (54).

5. A horizontal press-fitting device according to claim 1, characterized in that: The right fixture assembly (6) comprises a push plate (62) and a right fixture part (63), wherein the right fixture part (63) is fixed to the push plate (62), the push plate (62) is slidably connected to the guide column (2), and the right fixture part (63) is transmission-connected to the servo electric cylinder (61).

6. A horizontal press-fitting device according to claim 1, characterized in that: The servo slide (7) comprises a slide part (71) and a motor part (72), wherein the slide part (71) is transmission-connected with the motor part (72), the motor part (72) is fixed to the right fixed plate (3), and the slide part (71) is slidably connected with the guide column (2).

7. A horizontal press-fitting device according to claim 6, characterized in that: A workpiece support (73) is provided on the slide portion (71), and the workpiece support (73) is movably connected to the slide portion (71).

8. A horizontal press-fitting device according to claim 7, characterized in that: The number of the workpiece supports (73) is two, and the workpiece supports (73) are planar thin plate support structures.

9. A horizontal press-fitting device according to claim 1, characterized in that: The left fixture assembly (5) and the right fixture assembly (6) are both hole-shaft clearance fit connection structures.

10. A horizontal press-fitting device according to claim 9, characterized in that: The stop size of the left jig component (5) is the same as the stop size of the right jig component (6).

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