Flat square structure of synchronous belt wheel shaft

Abstract

The utility model relates to the technical field of testing of motor assemblies, in particular to a flat square structure of a synchronous belt wheel shaft, which comprises a motor shell, a lower cover is fixedly connected to one side of the motor shell, an upper cover is fixedly connected to the other side of the motor shell, wiring pins are fixedly connected to the surface of the lower cover, and the upper cover is fixedly connected to the surface of the upper cover. A motor rotating shaft is arranged in the motor shell, and a gear and a flat square block are installed on the surface of the motor rotating shaft. According to the utility model, the front end of the motor rotating shaft is additionally provided with the flat square structure, so that the testing efficiency can be greatly improved, the testing accuracy is ensured, a synchronous pulley is prevented from being touched, and the testing can be carried out only by inserting a matched tool into the flat square block at the front end of the motor rotating shaft and locking the tool in the testing process. The problems that the testing efficiency is low, and the belt wheel is prone to slipping and bumping are better solved, the time consumed by testing can be shortened, and the problem that in the prior art, the synchronous belt wheel is prone to being bumped in the testing process is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of testing of motor assemblies, and particularly to a flat square structure of a synchronous pulley shaft. Background Technique

[0002] The existing rack-type electric power steering system has the advantages of higher efficiency, such as faster response time and smaller overshoot in the classification of electric power steering systems. The vibration of the motor is not easily transmitted into the cockpit, thus bringing a more quiet riding environment.

[0003] The output end of the motor of this system is a synchronous pulley, which directly drives the rack for assistance through belt transmission. However, the output ends of the motor assemblies in the existing rack-type electric power steering systems are all synchronous pulley structures. At present, only a coupling can be used to lock the belt and the synchronous pulley to complete the test of the motor assembly. Since it is impossible to ensure that the belt and the pulley are fully engaged, it is easy to slip during the test. This method has low efficiency and is easy to damage the synchronous pulley. Content of the Utility Model

[0004] The purpose of the utility model is to provide a flat square structure of a synchronous pulley shaft to solve the problems in the background technique that the output ends of the motor assemblies in the rack-type electric power steering systems are all synchronous pulley structures. At present, only a coupling can be used to lock the belt and the synchronous pulley to complete the test of the motor assembly. Since it is impossible to ensure that the belt and the pulley are fully engaged, it is easy to slip during the test. This method has low efficiency and is easy to damage the synchronous pulley.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A flat square structure of a synchronous pulley shaft, including a motor housing, one side of the motor housing is fixedly connected with a lower cover, the other side of the motor housing is fixedly connected with an upper cover, the surface of the lower cover is fixedly connected with wiring pins, the inside of the motor housing is provided with a motor rotating shaft, a gear and a flat square block are installed on the surface of the motor rotating shaft, a clamping block is fixedly connected to the surface of the motor rotating shaft, a clamping groove is opened on the surface of the flat square block, a first jack is opened on the surface of the clamping groove, a first storage groove and a second storage groove are opened on the surface of the flat square block, a second jack is opened inside the clamping block, a fastening screw is installed on the surface of the second jack, and a nut is installed on the surface of the second storage groove.

[0006] Preferably, there are three groups of the wiring pins, and the gear is sleeved on the surface of the motor rotating shaft.

[0007] Preferably, the clamping block is inserted and connected to the surface of the clamping groove, and there are two groups of the first jacks.

[0008] Preferably, the two groups of the first jacks are opened on both sides of the engaging groove, one group of the first jacks is arranged on the surface of the first storage groove, and the other group of the first jacks is arranged on the surface of the second storage groove.

[0009] Preferably, the cross-section of the first storage groove is circular, the cross-section of the second storage groove is hexagonal, and the diameter of the second jack is the same as that of the first jack.

[0010] Preferably, the fastening screw passes through and is connected to the surface of the engaging block through the second jack, one end of the fastening screw is abutted and connected to the surface of the first storage groove, and the other end of the fastening screw is threadedly connected to the surface of the nut.

[0011] Preferably, the size of the nut is larger than that of the first jack, and the nut is abutted and connected to the surface of the second storage groove.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. By adding a flat square structure at the front end of the motor shaft, the test efficiency can be greatly improved, the test accuracy can be ensured, and the synchronous belt pulley can be avoided being hit. During the test, only the matching tooling needs to be inserted into the flat square block at the front end of the motor shaft and the tooling is locked to perform the test, which better solves the problems of low test efficiency, easy slipping of the belt pulley and easy bruising of the belt pulley, can greatly reduce the time consumed by the test, and solves the problem of easy bruising of the synchronous belt pulley during the test.

[0014] 2. By arranging a connecting mechanism between the motor shaft and the flat square block, the flat square block can be removed during damage or installation, so as to achieve the effect of replacing the flat square block. Under the connection action of the fastening screw and the nut, the flat square block is fixed on the surface of the engaging block, and then the motor shaft and the flat square block are connected. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a front view three-dimensional schematic diagram of the structure of the present utility model;

[0016] Figure 2 is a rear view three-dimensional schematic diagram of the structure of the present utility model;

[0017] Figure 3 is a right view three-dimensional schematic diagram of the structure of the present utility model;

[0018] Figure 4 is a three-dimensional schematic diagram of the structure of the flat square block of the present utility model;

[0019] Figure 5 is the present utility model Figure 4 in which is a three-dimensional schematic diagram of the structure of the fastening screw.

[0020] In the figure: 1, motor housing; 2, lower cover; 3, upper cover; 4, connection pin; 5, motor shaft; 6, gear; 7, flat block; 8, engaging block; 9, engaging groove; 10, first jack; 11, first storage groove; 12, second storage groove; 13, second jack; 14, fastening screw; 15, nut. Detailed implementation

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figures 1-5 , an embodiment provided by the present invention:

[0023] A flat square structure of a synchronous pulley shaft includes a motor housing 1. One side of the motor housing 1 is fixedly connected to a lower cover 2, and the other side of the motor housing 1 is fixedly connected to an upper cover 3. A connection pin 4 is fixedly connected to the surface of the lower cover 2. A motor shaft 5 is arranged inside the motor housing 1. A gear 6 and a flat block 7 are installed on the surface of the motor shaft 5. An engaging block 8 is fixedly connected to the surface of the motor shaft 5. An engaging groove 9 is formed on the surface of the flat block 7. A first jack 10 is formed on the surface of the engaging groove 9. A first storage groove 11 and a second storage groove 12 are formed on the surface of the flat block 7. A second jack 13 is formed inside the engaging block 8. A fastening screw 14 is installed on the surface of the second jack 13. A nut 15 is installed on the surface of the second storage groove 12. The motor housing 1, the lower cover 2, the upper cover 3, the connection pin 4, the motor shaft 5, and the gear 6 form the body of the motor. The connection pin 4 is connected to an external circuit, and the rotation of the motor shaft 5 can be driven through the internal structure of the motor, so that the gear 6 rotates.

[0024] Further, there are three groups of connection pins 4. The gear 6 is sleeved on the surface of the motor shaft 5. Under the action of the flat block 7, it can be connected to a mating tool during the test.

[0025] Further, the engaging block 8 is inserted and connected to the surface of the engaging groove 9. There are two groups of first jacks 10. Under the connection of the engaging block 8 and the engaging groove 9, the motor shaft 5 and the flat block 7 are connected.

[0026] Further, two groups of first jacks 10 are opened on both sides of the engaging groove 9. One group of first jacks 10 is arranged on the surface of the first storage groove 11, and the other group of first jacks 10 is arranged on the surface of the second storage groove 12. Under the action of the first jacks 10, the first storage groove 11 and the second storage groove 12 communicate with the surface of the engaging groove 9 through the two groups of first jacks 10 respectively.

[0027] Further, the cross-section of the first storage groove 11 is circular, and the cross-section of the second storage groove 12 is hexagonal. The diameter of the second jack 13 is the same as that of the first jack 10. The first storage groove 11 and the second storage groove 12 are respectively opened on both sides of the flat square block 7. The fastening screw 14 can be installed on its surface through the first storage groove 11, and the nut 15 can be installed on its surface through the second storage groove 12. And the fastening screw 14 is connected through the second jack 13 to the surface of the engaging block 8.

[0028] Further, the fastening screw 14 is connected through the second jack 13 to the surface of the engaging block 8. One end of the fastening screw 14 is abutted and connected to the surface of the first storage groove 11, and the other end of the fastening screw 14 is threadedly connected to the surface of the nut 15. Under the connection of the fastening screw 14 and the nut 15, the effect of fixing the connection between the flat square block 7 and the engaging block 8 is achieved.

[0029] Further, the size of the nut 15 is larger than that of the first jack 10. The nut 15 is abutted and connected to the surface of the second storage groove 12. Under the action of the nut 15, the installation of the fastening screw 14 is limited. At the same time, the nut 15 is engaged with the second storage groove 12, so that the nut 15 will not be driven to rotate during the rotation of the fastening screw 14.

[0030] Working principle: Before starting the motor, first install the flat square block 7 on the surface of the motor shaft 5, so that the engaging block 8 is inserted into the surface of the engaging groove 9, and then align the hole positions of the two groups of first jacks 10 and the second jack 13. At this time, first install the nut 15 on the surface of the second storage groove 12, then insert the fastening screw 14 into the surfaces of the first jack 10 and the second jack 13 in sequence, and pass through from the other group of first jacks 10. Rotate the fastening screw 14 and connect it to the nut 15 under the action of the thread. Finally, the nut 15 abuts against the surface of the second storage groove 12, and the other end of the fastening screw 14 abuts against the surface of the first storage groove 11, thus completing the installation of the flat square block 7. Finally, insert the matching tooling into the flat square block 7 at the front end of the motor shaft 5 and lock the tooling to perform the test.

[0031] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. A flat square structure of a synchronous pulley shaft, comprising a motor housing (1), characterized in that: A lower cover (2) is fixedly connected to one side of the motor housing (1), an upper cover (3) is fixedly connected to the other side of the motor housing (1), a wiring pin (4) is fixedly connected to the surface of the lower cover (2), a motor shaft (5) is arranged inside the motor housing (1), a gear (6) and a flat square (7) are mounted on the surface of the motor shaft (5), a clamping block (8) is fixedly connected to the surface of the motor shaft (5), a clamping groove (9) is provided on the surface of the flat square (7), a first plug hole (10) is provided on the surface of the clamping groove (9), a first storage groove (11) and a second storage groove (12) are provided on the surface of the flat square (7), a second plug hole (13) is provided inside the clamping block (8), a fastening screw (14) is mounted on the surface of the second plug hole (13), and a nut (15) is mounted on the surface of the second storage groove (12).

2. The flat square structure of a synchronous pulley shaft according to claim 1, characterized in that: The connection pins (4) are provided in three groups, and the gear (6) is sleeved on the surface of the motor shaft (5).

3. The flat square structure of a synchronous pulley shaft according to claim 1, characterized in that: The engaging block (8) is plugged and connected to the surface of the engaging groove (9), and two groups of the first inserting holes (10) are provided.

4. The flat square structure of a synchronous pulley shaft according to claim 3, characterized in that: Two groups of the first plug holes (10) are provided on both sides of the engaging groove (9), one group of the first plug holes (10) is arranged on the surface of the first storage groove (11), and the other group of the first plug holes (10) is arranged on the surface of the second storage groove (12).

5. The flat square structure of a synchronous pulley shaft according to claim 4, characterized in that: The cross section of the first storage groove (11) is in the shape of a circular hole, the cross section of the second storage groove (12) is in the shape of a hexagon, and the diameter of the second insertion hole (13) is the same as the diameter of the first insertion hole (10).

6. The flat square structure of a synchronous pulley shaft according to claim 1, characterized in that: The fastening screw (14) passes through the second insertion hole (13) and is connected to the surface of the locking block (8); one end of the fastening screw (14) is abutted against the surface of the first storage groove (11); and the other end of the fastening screw (14) is connected to the surface of the nut (15) through a thread.

7. The flat square structure of a synchronous pulley shaft according to claim 6, characterized in that: The size of the nut (15) is larger than the size of the first insertion hole (10), and the nut (15) is abutted against and connected to the surface of the second storage groove (12).

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