Motor mounting and positioning tool

Abstract

A motor installing and positioning tool comprises a top plate and a bottom plate which are separated from each other and fixed relatively, and a pressing rod and a supporting seat which are coaxially installed on the top plate and the bottom plate respectively, the pressing rod is fixed to the top plate through a linear bearing in a sliding mode in the linear bearing, and a conical surface is formed on the end side, facing the supporting seat, of the pressing rod. The supporting seat is used for placing a mechanical assembly with an unfixed motor. The pressing rod is used for being matched with a positioning hole in the tail portion of the lead screw in the mode that the pressing rod and the lead screw of the motor are coaxial through the conical surface. The distance between the supporting base and the linear bearing is larger than the distance between the cylinder end face of the motor and the tail end of the motor shell. And the coaxiality of the piston and the cylinder body after assembly is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technology field, concretely relates to a motor installation positioning frock. BACKGROUND

[0002] Under the background of automobile intelligence and electrification, the traditional internal combustion engine is replaced by the motor and the battery, the vacuum source of the whole vehicle is missing, and the hydraulic pipeline pressure cannot be built through the vacuum booster, the vacuum booster pump is not widely promoted because of the characteristics of large noise and short service life. The brake hydraulic pipeline pressure is built by the motor instead of the vacuum booster in the brake-by-wire, so as to effectively solve the problem of the lack of vacuum source. According to the different implementation forms of the passenger car brake-by-wire system, the brake-by-wire system can be divided into EHB (electronic hydraulic brake system) and EMB (electronic mechanical brake system) two types.

[0003] EHB is based on the traditional hydraulic brake system, uses electronic devices to replace the function of part of mechanical components, uses brake fluid as power transmission medium, and has a hydraulic backup brake system, which is the current mainstream technical scheme. According to the integration degree, EHB is divided into two technical schemes of split type and integral type.

[0004] Among them, the integral type uses the motor to provide torque, and uses the ball screw to convert the rotary motion into linear motion, and then drives the piston to move, and compresses the brake fluid in the cylinder to generate hydraulic pressure. As shown in Figure 4 The integral type transmission booster mechanism is composed of nut 1, motor assembly 2, spring washer 3, ball screw 4, piston 5, screw 6, valve block 7, auxiliary leather bowl 8, main leather bowl 9, cylinder 10 and anti-rotation sleeve 11. The motor assembly 2 is composed of motor shell 2-1, bearing 2-2, rotor 2-3, stator and other parts, the ball screw 4 is composed of screw rod 4-1, nut 4-2, steel ball, commutator and limit key. The assembly relationship is as follows: the spring washer 3 is gap fitted with the screw rod 4-1, which is sleeved on the screw rod shaft, the screw rod 4-1 is pressed together with the rotor 2-3 in interference fit, the piston 5 is pressed together with the nut 4-2 in interference fit, and the ball screw 4 and the motor assembly 2 are fixed by locking washer and nut to form the motor transmission assembly. The main leather bowl 9 and the auxiliary leather bowl 8 are installed in the cylinder leather bowl groove, the anti-rotation sleeve 11 and the cylinder 10 are fixed on the valve block 7 by riveting to form the valve block assembly, and the center shaft of the motor assembly 2 is aligned with the center shaft of the cylinder 10, and the key on the nut 4-2 is installed in the limit groove on the anti-rotation sleeve 11, and the motor assembly 2 is fixed on the valve block 7 by the screw 6 to form the transmission booster mechanism.

[0005] When the rotor 2-3 in the motor assembly 2 rotates, the rotor 2-3 drives the lead screw 4-1 in the ball screw 4 to rotate. When the lead screw 4-1 rotates, the nut 4-2 also moves. However, due to the limiting effect of the anti-rotation sleeve 11, the nut 4-2 cannot rotate with it and can only move in a straight line, pushing the piston 5 to move and generating brake fluid pressure in the cylinder 10.

[0006] The existing solution is to first press the cylinder 10 into the valve block 7, then install the motor drive assembly into the anti-rotation sleeve 11 and the cylinder 10, and tighten it with screws 6.

[0007] like Figure 5 As shown, there is a gap 13 between screw 6 and the screw mounting hole on the motor flange. During the tightening of screw 6, if the motor is subjected to external forces or other factors, the motor transmission assembly and the cylinder 10 will not be axed, which will affect the lead screw 4-1, lead nut 4-2 and piston 5 in the motor transmission assembly and the cylinder 10. Since the piston 5 and the cylinder 10 are not axed, the force on each diaphragm cup and piston 5 will be uneven. During operation, uneven wear will occur, which will accelerate the wear of each diaphragm cup and reduce the service life of each diaphragm cup.

[0008] As mentioned above, modern automobiles and other products have high requirements for the noise level and service life of the entire vehicle. Therefore, it is necessary to ensure that the piston 5 and cylinder 10 of the product have a high degree of coaxiality. This can not only avoid noise caused by uneven wear between the piston and cylinder, but also prevent the wear of the piston cup from reducing its service life. Utility Model Content

[0009] To address the aforementioned problems, the purpose of this utility model is to provide a motor mounting and positioning fixture.

[0010] According to this utility model, a motor mounting and positioning fixture is provided, comprising: a top plate and a bottom plate that are spaced apart and fixed to each other, and a pressure rod and a support seat that are coaxially mounted on the top plate and the bottom plate respectively. The pressure rod is fixed to the top plate via a linear bearing in a slidable manner within a linear bearing. A conical surface is formed on one end of the pressure rod facing the support seat. The support seat is used to place a mechanical assembly with an unfixed motor.

[0011] Preferably, the top plate and the bottom plate are fixed in a manner that separates them from each other via a plurality of support rods.

[0012] Preferably, the ends of each support rod are fixedly connected to corresponding holes in the top or bottom plate using washers and screws.

[0013] Preferably, a positioning sleeve is fixedly provided at the connection point around the corresponding position hole by screws.

[0014] Preferably, the support base is provided with a sleeve portion for accommodating the cylinder body of the motor in a manner that aligns the cylinder body and the pressure rod coaxially.

[0015] Preferably, on the top plate, the linear bearing is limited by the positioning pin.

[0016] Preferably, the linear bearing is fixed on the top plate via the screw.

[0017] Preferably, the pressing rod is used to cooperate with the tail hole of the screw rod by the conical surface to ensure the coaxiality of the pressing rod and the screw rod of the motor.

[0018] Preferably, the distance between the support seat and the linear bearing is greater than the distance from the cylinder end face of the motor to the tail end of the motor shell.

[0019] The utility model provides a motor installation positioning frock, through above -mentioned structure and corresponding operation, improved coaxiality of piston and cylinder after assembly. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 Schematically show the front view of the motor installation positioning frock according to the exemplary embodiment of the utility model.

[0021] Figure 2 Schematically show the motor assembly working condition diagram of the motor installation positioning frock.

[0022] Figure 3 Schematically show the partial sectional view of the pressing rod and screw rod assembly of the motor installation positioning frock.

[0023] Figure 4 Schematically show the sectional view of the existing integral transmission power assisting mechanism.

[0024] Figure 5 Schematically show the sectional view of the motor and valve block installation position in Figure 4

[0025] Reference signs: 21 - screw; 22 - screw; 23 - gasket; 24 - top plate; 25 - positioning pin; 26 - pressing rod; 27 - linear bearing; 28 - support rod; 29 - support seat 29; 30 - bottom plate; 31 - positioning sleeve; 32 - motor. DETAILED DESCRIPTION

[0026] ​Exemplary embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the purpose of the exemplary embodiments described below and illustrated in the drawing figures is to teach their principles so that those skilled in the pertinent arts can realize and apply the present application in a variety of different environments and usages. Therefore, the description of exemplary embodiments is not intended to limit the scope of the present application, as claimed. Also, the sizes of the various parts shown in the drawings are not intended to be to scale, and the description of orientation, e.g., above, below, left, right, top, bottom, etc., is made merely for the purpose of ease of description and to provide a common reference frame for the description of the exemplary embodiments. Therefore, the present application is not limited to the specific embodiments described and illustrated, but only by the claims. Like reference numerals are intended to represent like parts throughout the various drawings. In the event that the common reference numerals differ in the various drawings, this is due to the fact that the drawings are simplified for the sake of clarity. Unless specifically set forth herein, the order and combination of steps, as set forth in the embodiments, and the numerical values are not limitations on the scope of the present application.

[0027] For simplicity of description, in the following description, the motor and other related components of the integrated transmission assist mechanism still use the above-mentioned reference numerals.

[0028] As shown in Figures 1 to 3 According to the exemplary embodiments of the present application, a motor mounting and positioning tool (hereinafter also referred to as tool) is proposed to improve the coaxiality of the piston 5 and the cylinder body 10 after the motor 32 is assembled, and the positioning tool itself also has excellent coaxiality.

[0029] The tool includes: a screw 21, a screw 22, a gasket 23, a top plate 24, a positioning pin 25, a pressing rod 26, a linear bearing 27, a support rod 28, a support seat 29, a bottom plate 30, and a positioning sleeve 31.

[0030] The top plate 24 and the bottom plate 30 are fixed in a manner that they are spaced apart from each other via a plurality of support rods 28, and the end of each support rod 28 is fixedly connected to a corresponding position hole of the top plate 24 or the bottom plate 30 by using the gasket 23 and the screw 22. The positioning sleeve 31 is fixedly arranged at the connection around the corresponding position hole by the screw 21, for example, the positioning sleeve 31 is fixed on the top plate 24 by the screw 21.

[0031] The support seat 29 is fixedly installed on the bottom plate 30 via a threaded member, and the support seat 29 is provided with a sleeve portion for accommodating the cylinder body 10, so that the gap at the matching part with the cylinder body 10 should be small, and the coaxiality of the cylinder body 10 and the pressing rod 26 is ensured.

[0032] On the top plate 24, the linear bearing 27 is limited by the locating pin 25 to ensure the position of the linear bearing 27; and is fixed by screws.

[0033] The pressure rod 26 and the linear bearing 27 are fitted with a small clearance, and the pressure rod 26 can slide freely in the linear bearing 27.

[0034] The pressure rod 26 is used to mate with the positioning hole at the tail of the lead screw 4-1. The coaxiality of the pressure rod 26 and the lead screw 4-1 is ensured by the tapered surface located on the side facing the support seat 29.

[0035] The pressure rod 26 (and the linear bearing 27) and the support 29 have good coaxiality. This coaxiality can be guaranteed by the workpiece accuracy and subsequent assembly adjustment, and can be determined by detection methods such as coordinate measuring machines. Moreover, the distance between the support 29 and the linear bearing 27 should be greater than the distance from the end face of the cylinder 10 to the tail end of the motor housing 2-1 to ensure that the product can be placed in the tooling.

[0036] like Figure 2 As shown, during assembly, first install the motor drive assembly into the anti-rotation sleeve 11 and cylinder 10, then install the product into the fixture as shown in the figure, that is, place the cylinder 10 into the support base 29, ensuring that the bottom surface of the valve block 7 is tightly fitted with the top surface of the support base 29. After placing it into the fixture, place the pressure rod 26 into the linear bearing 27, and apply a certain force to the other end of the pressure rod 26, such as... Figure 2 The force F at the upper end is illustrated because the support seat 29 and the linear bearing 27 have a high degree of coaxiality. Therefore, after a certain force is applied to the pressure rod 26, the lead screw 4-1 will automatically adjust its position to ensure that the lead screw 4-1 and the cylinder 10 are coaxial. Under this state, the screw 6 is tightened.

[0037] The force applied to the pressure bar 26 should be less than the riveting force of the bearing 2-2 in the motor 32 (corresponding to the motor assembly 2) to prevent the bearing 2-2 from shifting.

[0038] Force can be applied to the pressure bar 26 through various means such as quick clamps and presses.

[0039] The pressure bar 26 can move on the linear bearing 27 (sliding bearing) to use products of different specifications.

[0040] In the description of the application, the meaning of "a plurality of" is two or more than three, unless otherwise expressly specifically limited. Unless otherwise expressly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the application can be understood according to the specific circumstances. Although the utility model has been described with reference to various specific embodiments, it should be understood that modifications can be made within the spirit and scope of the described utility model concept. Therefore, it is intended that the utility model is not limited to the described embodiments, but will have the full scope defined by the language of the appended claims.

Claims

1. An electric machine mounting positioning fixture, characterized by, Comprise: The fixed top plate (24) and the bottom plate (30) are separated from each other, the press rod (26) and the support seat (29) are coaxially installed on the top plate (24) and the bottom plate (30) respectively, wherein the press rod (26) is fixed to the top plate (24) through the linear bearing (27) in a slidable manner, the end of the press rod (26) towards the support seat (29) is formed with a tapered surface, and the support seat (29) is used for placing a mechanical assembly with an un-fixed motor.

2. The motor mounting positioning tool of claim 1, wherein The top plate (24) and the bottom plate (30) are fixed in a way that they are separated from each other by a plurality of support rods (28).

3. The motor mounting positioning tool of claim 2, wherein, The end of each support rod (28) is fixed and connected to the corresponding position hole of the top plate (24) or the bottom plate (30) by a gasket (23) and a screw (22).

4. The motor mounting positioning tool of claim 3, wherein, A positioning sleeve (31) is fixedly arranged around the connecting part of the corresponding position hole by a screw (21).

5. The motor mounting positioning fixture of claim 1, wherein The support seat (29) is provided with a sleeve part for accommodating the cylinder (10) of the motor in a coaxial alignment manner of the cylinder (10) and the press rod (26).

6. The motor mounting positioning fixture of claim 1, wherein, The linear bearing (27) is limited by a positioning pin (25) on the top plate (24).

7. The motor mounting positioning fixture of claim 6, wherein, The linear bearing (27) is fixed on the top plate (24) by a screw part.

8. The motor mounting positioning fixture of claim 1, wherein, The press rod (26) is used to cooperate with the tail positioning hole of the lead screw (4-1) in a way that the tapered surface ensures the coaxial alignment of the press rod (26) and the lead screw (4-1) of the motor.

9. The motor mounting positioning fixture of claim 1, wherein, The distance between the support seat (29) and the linear bearing (27) is greater than the distance from the end face of the cylinder (10) of the motor to the tail end of the motor shell (2-1).

Images