CN213714588U

CN213714588U - Motor torque testing device of powder tray assembly

Info

Publication number: CN213714588U
Application number: CN202120005270.7U
Authority: CN
Inventors: 陈锡雁; 梁郁庆
Original assignee: Zhejiang Tianxi Kitchen Appliance Co Ltd
Current assignee: Zhejiang Tianxi Kitchen Appliance Co Ltd
Priority date: 2021-01-04
Filing date: 2021-01-04
Publication date: 2021-07-16
Anticipated expiration: 2031-01-04

Abstract

The utility model provides a motor torque testing arrangement of powder dish subassembly includes: a box body; the product placing block is fixedly arranged at the bottom of the box body and used for placing the powder tray assembly, and a spiral head of a motor to be tested in the powder tray assembly is arranged upwards; the ejector rod is arranged above the screw head of the motor to be tested in a lifting manner and is used for transmitting the rotating lifting force of the screw head; the detection cylinder is arranged above the ejector rod and used for applying a set amount of downward pressure to the ejector rod; and the laser sensor is fixedly arranged at the top of the box body, and the light path is right opposite to the detection cylinder and is used for measuring the position change of the detection cylinder along the height direction. The embodiment of the disclosure can overcome the problem that a motor torque tester is difficult to set in the powder tray assembly, improve the positioning precision in the detection process, reasonably avoid other structures in the powder tray assembly, and improve the accuracy of motor torque test and the timeliness and synchronism of detection data.

Description

Motor torque testing device of powder tray assembly

Technical Field

The utility model relates to a domestic appliance's manufacturing field especially relates to a motor torque testing arrangement of powder dish subassembly.

Background

In the field of manufacturing and processing of household appliances, along with the continuous improvement of intellectualization and automation degree, the application of the motor is more and more extensive, for example, the swinging action of various swinging parts, the rotating action of various rotating parts, the opening and closing action of various cabin doors, the lifting and descending action of various trays and the like in the household appliances can be driven by the motor. In each test of the motor, the torque is an important parameter in motor evaluation, and the test accuracy is related to whether the motor can be normally used.

In the field of kitchen appliances, a powder pan assembly is a device for mixing fixed powder such as flour and rice flour with liquid substances such as oil and water, and is widely used in automatic dough kneading machines and automatic cake baking machines. In the process of fixing the powder and liquid substance to mix with each other at the powder tray assembly, the blanking amount and the mixing and stirring speed of raw and other materials need to be accurately controlled, which respectively depend on the powder tray driving motor and the stirring driving motor to accurately drive the corresponding transmission structures with the respective set torques. Therefore, it is necessary to perform torque detection on the powder tray driving motor and the stirring driving motor in the powder tray assembly before the powder tray is shipped.

However, the related motor torque tester has a single structure and is difficult to match with the motor in the powder tray assembly, so that the torque test requirement of the motor in the distribution assembly cannot be met. If a simple torque tester is used for measurement, no specific measurement data is displayed, so that the detection precision is reduced on one hand, and the test efficiency is influenced due to difficult operation on the other hand.

SUMMERY OF THE UTILITY MODEL

In view of this, the embodiment of the present disclosure provides a motor torque testing apparatus for a powder tray assembly, which can overcome the problem that a motor torque tester is difficult to set in the powder tray assembly, improve the positioning precision in the detection process, reasonably avoid other structures in the powder tray assembly, and improve the accuracy of the motor torque test and the timeliness and synchronization of the detection data.

In one aspect of the present disclosure, there is provided a motor torque testing apparatus of a powder tray assembly, including:

a box body;

the product placing block is fixedly arranged at the bottom of the box body and used for placing the powder tray assembly, and a spiral head of a motor to be tested in the powder tray assembly is arranged upwards;

the ejector rod is arranged above the screw head of the motor to be tested in a lifting manner and is used for transmitting the rotating lifting force of the screw head;

the detection cylinder is arranged above the ejector rod and used for applying a set amount of downward pressure to the ejector rod; and

and the laser sensor is fixedly arranged at the top of the box body, and the light path is right opposite to the detection cylinder and is used for measuring the position change of the detection cylinder along the height direction.

In some embodiments, the cylinder rod of the detection cylinder is in threaded fastening connection with the ejector rod, and the motor torque testing device further includes:

and the positioning assembly is telescopically connected with the ejector rod, is fixedly connected with the cylinder barrel of the detection cylinder and is movably arranged in the box body, so that the lower end of the ejector rod is positioned above the spiral head along the height direction and the front-back direction.

In some embodiments, the positioning assembly comprises:

a base plate;

the sliding plate is arranged above the bottom plate in a sliding mode along the front-back direction and is provided with a first through hole used for penetrating the ejector rod; and

and the first fixing frame is fixedly arranged above the sliding plate and used for fixedly arranging the cylinder barrel of the detection cylinder and enabling the vertical projection of the cylinder rod of the detection cylinder on the sliding plate to be superposed on the first through hole.

In some embodiments, the positioning assembly further comprises:

the track plate is fixedly arranged above the bottom plate, and the upper surface of the track plate is provided with a first sliding rail which is arranged along the front-back direction and is used for being connected with the sliding plate in a sliding manner;

the second fixing frame is vertically arranged at the rear part of the track plate upwards and is provided with a second through hole; and

and the cylinder barrel is fixedly arranged on the second fixing frame, and the cylinder rod penetrates through the second through hole and is connected to the first fixing frame and used for driving the sliding plate to slide back and forth relative to the track plate.

In some embodiments, the front side of the bottom plate is provided with a recess for receiving the ejector pin when the sliding plate slides along the first slide rail to the rearmost end.

In some embodiments, the positioning assembly further comprises:

the top plate is fixedly arranged above the bottom plate and the detection cylinder through an upright post; and

and the cylinder barrel is fixedly arranged at the top of the box body, and the cylinder rod penetrates through the top of the box body and is connected to the top plate and used for driving the top plate to slide up and down relative to the top of the box body.

In some embodiments, the positioning assembly further comprises:

the second sliding rails are fixedly arranged on the left side and the right side of the interior of the box body along the height direction; and

and the sliding blocks are fixedly arranged on the left side and the right side of the bottom plate and are in sliding fit with the second sliding rails.

In some embodiments, the motor torque testing apparatus further comprises:

the gas circuit of the first gas pressure regulating valve is communicated with the detection cylinder, the propulsion cylinder and the lower pressure cylinder and is used for regulating the gas supply pressure from the pressure gas source; and

and the second air pressure regulating valve is arranged between the first air pressure regulating valve and the detection cylinder and is configured to control the air supply time and the air supply pressure of the detection cylinder.

In some embodiments, the motor torque testing apparatus further comprises:

an electrical control box communicatively connected to the laser sensor, the first air pressure regulating valve, and the second air pressure regulating valve, and configured to: after the powder disc assembly is placed on the product placing block, responding to a starting signal, controlling the first air pressure regulating valve to be opened, enabling the positioning assembly to position the ejector rod above the screw head of the motor to be tested along the front-back direction and the height direction under the driving of the propelling cylinder and the pressing cylinder, then controlling the second air pressure regulating valve to be opened, enabling the detection cylinder to apply a set downward pressure to the ejector rod, and finally detecting the position change of the detection cylinder along the height direction through the laser sensor, so as to test the torque of the motor to be tested; and

and the human-computer interface is in communication connection with the electrical control box and is used for displaying a torque test result of the motor to be tested.

In some embodiments, the powder tray assembly comprises two motors to be tested, and the number of the ejector rods, the number of the detection air cylinders and the number of the laser sensors are two, so that torque test is performed on the two motors to be tested respectively.

Therefore, according to the embodiment of the disclosure, the torque test is performed by using the rotation lifting force of the screw head of the motor to be tested and the displacement of the detection cylinder along the height direction as an intermediate parameter, so that the problem that a motor torque tester is difficult to arrange in the powder disc assembly is solved; the lower end of the ejector rod is positioned between the spiral head and the lower end of the ejector rod in the height direction and the front-back direction through the positioning assembly, so that the positioning precision in the detection process is improved, and other structures in the powder disc assembly are reasonably avoided; the position of the detection cylinder is accurately measured through the laser sensor, the motor torque testing accuracy is improved, and the timeliness and the synchronism of detection data are improved.

Drawings

The accompanying drawings are included to provide a further understanding of the claimed subject matter and are incorporated in and constitute a part of this specification, illustrate embodiments of the subject matter and together with the description serve to explain the principles of the subject matter and not to limit the subject matter.

FIG. 1 is a schematic structural diagram of a motor torque testing device of a powder pan assembly according to some embodiments of the present disclosure;

fig. 2 is a schematic structural view illustrating a part where a motor to be tested and a push rod are combined in a motor torque testing device of a powder pan assembly in some embodiments of the present disclosure;

fig. 3 is a schematic structural diagram of a positioning assembly in a motor torque testing device of a powder tray assembly according to some embodiments of the present disclosure.

Description of reference numerals:

1-box 2-product placing block 3-powder tray assembly

31-to-be-tested motor 32-spiral head 4-ejector rod

5-detection cylinder 6-laser sensor 7-positioning assembly

71-bottom plate 711-recessed portion 72-sliding plate

721-first through hole 73-first fixing frame 74-track plate

741-first slide rail 75-second fixing frame 751-second through hole

76-propulsion cylinder 77-top plate 78-hold-down cylinder

79-second slide rail 710-slide block 81-first air pressure regulating valve

82-second air pressure regulating valve 91-electric control box 92-man-machine interface

921-mounting bracket 93-first indicator light 94-second indicator light

95-third indicator light 96-fourth indicator light 97-scram button

98-foot pad 99-power line interface 910-handle

911-electromagnetic valve

Detailed Description

Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments are to be construed as merely illustrative, and not as limitative, unless specifically stated otherwise.

The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element preceding the word covers the element listed after the word, and does not exclude the possibility that other elements are also covered. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

In the present disclosure, when a specific device is described as being located between a first device and a second device, there may or may not be intervening devices between the specific device and the first device or the second device. When a particular device is described as being coupled to other devices, that particular device may be directly coupled to the other devices without intervening devices or may be directly coupled to the other devices with intervening devices.

All terms (including technical or scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

As shown in FIGS. 1 to 3:

in one aspect of the present disclosure, a motor torque testing device of a powder tray assembly is provided, which includes a box body 1, a product placing block 2, a top rod 4, a detection cylinder 5 and a laser sensor 6. The product placing block 2 is fixedly arranged at the bottom of the box body 1 and is used for placing the powder tray assembly 3, and the spiral head of the motor 31 to be tested in the powder tray assembly 3 is arranged upwards; the mandril 4 is arranged above the screw head 32 of the motor to be measured in a lifting way and is used for transmitting the rotating lifting force of the screw head; the detection cylinder 5 is arranged above the ejector rod 4 and is used for applying a set amount of downward pressure to the ejector rod 4; and the laser sensor 6 is fixedly arranged at the top of the box body 1, and the light path is opposite to the detection cylinder 5 and is used for measuring the position change of the detection cylinder 5 along the height direction.

This disclosed embodiment utilizes the rotatory lift of the motor 31 spiral head that awaits measuring, turns into the measurement of motor spiral head rising distance with the measurement of motor moment of torsion to measure as the intermediate parameter with the displacement that detects cylinder 5 along the direction of height, thereby guaranteeing under the prerequisite that motor moment of torsion test accuracy satisfies the requirement, rationally dodge other structures in the powder dish subassembly 3, measure through ejector pin 4 from the top of the motor 31 that awaits measuring.

Considering that the connection form between the screw head of the motor 31 to be detected and the ejector rod 4 is difficult to be fixedly connected, the embodiment of the present disclosure further compresses the ejector rod 4 to the screw head of the motor 31 to be detected through the detection cylinder 5, and controls the compression force of the detection cylinder 5 to be a set force, so as to improve the connection tightness between the two. Therefore, the screw head of the motor 31 to be measured can jack up the detection cylinder 5 only when the rotational lifting force of the screw head is larger than the set pressing force of the detection cylinder 5 in the height direction. Based on this principle, the tester can set the pressing force of the detection cylinder 5 to be equal to the rotating lifting force of the screw head under the condition that the torque of the motor 31 to be tested is qualified, so as to judge whether the torque of the motor 31 to be tested is qualified or not by measuring the position change in the height direction caused by whether the detection cylinder 5 is jacked up or not.

Considering that the position change of the detection cylinder 5 in the height direction may be relatively small, the embodiment of the present disclosure measures the position change of the detection cylinder 5 in the height direction by the laser sensor 6, thereby more accurately and timely capturing any small position change of the detection cylinder 5. In addition, since the larger the torque of the motor 31 to be measured is, the larger the rotational lifting force of the screw head thereof is, and the larger the positional change of the detection cylinder 5 in the height direction is when the detection cylinder 5 is lifted up, the laser sensor 6 can measure the positional change of the detection cylinder 5 in the height direction in real time and represent the torque condition of the motor 31 to be measured by the positional peak value in the height direction.

The principle that the screw head of the motor 31 to be measured can generate the rotating lifting force is explained as follows: in the rotating process of the spiral structure, the spiral surface of the spiral structure serving as an inclined surface can actually continuously push an object in contact with the spiral structure to move along the axial direction of the spiral structure, and the spiral structure is also a reason that the thread can axially drill or drill a threaded hole along with the rotation of the spiral structure and is also a reason that the nut can move along the length direction of the screw rod when rotating on the screw rod; another typical structure is that of a cap portion of a push type ball point pen, which is similar to a screw structure and is also capable of converting a rotational motion to a vertical motion. The cooperation relation between spiral head and the ejector pin in this embodiment of the disclosure is the same, and along with the rotation of spiral head, its spiral lifting force will act on the length direction of ejector pin to will detect motor jack-up through the ejector pin.

However, it should be noted that the rotating lifting force of the spiral structure has an upper dead point and a lower dead point, and when the pushed object exceeds the upper dead point or the lower dead point, the spiral structure no longer contacts with the pushed object, and thus the pushing force cannot be generated continuously, so that the contact position between the push rod 4 and the spiral head 32 of the motor to be tested in the present disclosure needs not to exceed the top dead point position where the spiral head 32 pushes the object to rise.

In some embodiments, considering that the ejector rod 4 is used for transmitting the force between the motor 31 to be detected and the detection cylinder 5, in the relationship of connection between two of the three results, the cylinder rod of the detection cylinder 5 and the ejector rod 4 are connected by screw fastening, and the ejector rod 4 and the screw head of the motor 31 to be detected can only abut against each other, and considering that the motor 31 to be detected is deeply buried inside the powder tray assembly 3, the setting direction of the ejector rod 4 and the positioning process thereof have higher requirements. To this end, the motor torque testing device further comprises a positioning assembly 7, wherein the positioning assembly 7 is telescopically connected with the ejector rod 4, is fixedly connected with the cylinder barrel of the detection cylinder 5, and is movably arranged in the box body 1, so that the lower end of the ejector rod 4 is positioned above the spiral head 32 along the height direction and the front-back direction.

Specifically, in some embodiments, the positioning assembly 7 includes a bottom plate 71, a sliding plate 72, and a first fixing frame 73. The sliding plate 72 is slidably disposed above the bottom plate 71 along the front-back direction, and is provided with a first through hole 721 for penetrating the push rod 4; the first fixing frame 73 is fixedly disposed above the sliding plate 72, and is used for fixedly disposing the cylinder barrel of the detection cylinder 5, and making the vertical projection of the cylinder rod of the detection cylinder 5 on the sliding plate 72 coincide with the first through hole 721. Therefore, the positioning assembly 7 realizes the matching of the relative position between the ejector rod 4 and the detection cylinder 5, and provides a limit structure formed by the first through hole 721 and the first fixing frame 73 for the threaded fastening connection of the two.

Further, in order to enable the ejector rod 4 to be matched with the screw head 32 of the motor to be measured in the front-back direction, in some embodiments, the positioning assembly 7 further includes a track plate 74, a second fixing frame 75 and a propulsion cylinder 76. The track plate 74 is fixedly disposed above the bottom plate 71, and the upper surface of the track plate is provided with a first slide rail 741 arranged along the front-back direction and used for slidably connecting with the slide plate 72; the second fixing frame 75 is vertically arranged at the rear of the track plate 74 upwards and is provided with a second through hole 751; the propulsion cylinder 76 is fixed to the second fixing frame 75, and the cylinder rod passes through the second through hole 751 and is connected to the first fixing frame 73, so that the sliding plate 72 can be driven to slide back and forth relative to the rail plate 74.

In the process of position-matching the jack 4 with the screw head 32 of the motor to be measured in the front-rear direction, in consideration of the positional interference between the bottom plate 71 and the jack 4, in some embodiments, the front side of the bottom plate 71 is provided with a recessed portion 711 for accommodating the jack 4 when the sliding plate 72 slides to the rearmost end along the first slide rail 741.

Similarly, in order to match the position of the top rod 4 with the screw head 32 of the motor to be measured in the height direction, in some embodiments, the positioning assembly 7 further includes a top plate 77 and a pressing cylinder 78. Wherein, the top plate 77 is fixedly arranged above the bottom plate 71 and the detection cylinder 5 through a vertical column; the push-down cylinder 78 has its cylinder fixed to the top of the casing 1, and a cylinder rod is connected to the top plate 77 through the top of the casing 1, so that the top plate 77 can be driven to slide up and down with respect to the top of the casing 1.

In order to provide a limit and a guide for the pressing down process of the top rod 4 during the process of the top rod 4 matching the position of the screw head 32 of the motor to be measured along the height direction, in some embodiments, the positioning assembly 7 further includes a second slide rail 79 and a slide block 710. The second slide rails 79 are fixedly arranged at the left side and the right side of the interior of the box body 1 along the height direction; the sliding blocks 710 are fixedly disposed on the left and right sides of the bottom plate 71 and slidably engaged with the second sliding rails 79.

Further, in order to supply air and control pressure to the detection cylinder 5, the propulsion cylinder 76, and the push-down cylinder 78, in some embodiments, the motor torque testing apparatus further includes a first air pressure regulating valve 81 and a second air pressure regulating valve 82. The first air pressure regulating valve 81 is in air path communication with the detection cylinder 5, the propulsion cylinder 76 and the lower pressure cylinder 78 and is used for regulating the air supply pressure from the pressure air source; the second air pressure regulating valve 82 is disposed between the first air pressure regulating valve 81 and the detection cylinder 5, and is configured to control the timing of air supply to the detection cylinder 5 and the air supply pressure.

Further, in order to improve the degree of automation and the degree of intelligence, in some embodiments, the motor torque testing apparatus further includes an electrical control box 91 and a human-machine interface 92. The electrical control box 91 is communicatively connected to the laser sensor 6, the first air pressure regulating valve 81, and the second air pressure regulating valve 82, and is configured to: after the powder tray assembly 3 is placed on the product placing block 2, the first air pressure regulating valve 81 is controlled to be opened in response to a starting signal, the positioning assembly 7 is driven by the propulsion cylinder 76 and the downward pressing cylinder 78 to position the ejector rod 4 above the screw head 32 of the motor to be tested along the front-back direction and the height direction, then the second air pressure regulating valve 82 is controlled to be opened, the detection cylinder 5 applies downward pressure with a set magnitude to the ejector rod 4, and finally the position change of the detection cylinder 5 along the height direction is detected through the laser sensor 6, so that the torque of the motor 31 to be tested is tested; the human-machine interface 92 is communicatively connected to the electrical control box 91, and is fixedly disposed on the electrical control box 91 through the mounting block 921 for displaying a torque test result of the motor 31 to be tested.

Further, it is considered that two motors are provided in the powder pan assembly 3: powder dish driving motor and stirring driving motor, consequently the quantity of ejector pin 4, detection cylinder 5 and laser sensor 6 in this disclosed embodiment is two to carry out the torque test to two motors 31 that await measuring respectively.

And in order to make the test structure of the motor torque more intuitive, a first indicator light 93, a second indicator light 94, a third indicator light 95 and a fourth indicator light 96 which are in signal connection with the electric control assembly are respectively arranged. The first indicator light 93 and the second indicator light 94 are used for displaying whether the torque of the motor 31 to be tested on the left side is normal, and correspondingly, the third indicator light 95 and the fourth indicator light 96 are used for displaying whether the torque of the motor 31 to be tested on the right side is normal.

Further, the case 1 provided by the embodiment of the present disclosure is further provided with an emergency stop button 97, a power line interface 99 and a solenoid valve assembly 911. The emergency stop button 97 is used for controlling the actions of the detection cylinder 5, the propulsion cylinder 76 and the push-down cylinder 78 to stop through an electric control assembly, so that the detection process is interrupted in case of emergency, and dangerous situations are prevented. The solenoid valve assembly 911 is used to control the operation of each cylinder. The power line interface 99 is used for supplying power to the electric control assembly and each cylinder.

In addition, the box body 1 provided by the embodiment of the disclosure is further provided with the handle 910 and the foot pad 98, the handle 910 can facilitate the grasping and the position adjustment of the box body 1 by an operator, and the foot pad 98 can adjust the connecting lines of the motor 31 to be measured, the ejector rod 4, the detection cylinder 5 and the laser sensor 6 along the vertical direction, so that the measurement error is further reduced.

Therefore, according to the embodiment of the present disclosure, the torque test is performed by using the rotation lifting force of the screw head of the motor 31 to be tested and the displacement of the detection cylinder 5 in the height direction as an intermediate parameter, so as to overcome the problem that the motor torque tester is difficult to be arranged in the powder tray assembly 3; the positioning component 7 is used for positioning the lower end of the ejector rod 4 and the screw head 32 along the height direction and the front-back direction, so that the positioning precision in the detection process is improved, and other structures in the powder disc component 3 are avoided reasonably; the position of the detection cylinder 5 is accurately measured through the laser sensor 6, the motor torque testing accuracy is improved, and the timeliness and the synchronism of detection data are improved.

Thus, various embodiments of the present disclosure have been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.

Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that various changes may be made in the above embodiments or equivalents may be substituted for elements thereof without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. The utility model provides a motor torque testing arrangement of powder dish subassembly which characterized in that includes:

a box body (1);

the product placing block (2) is fixedly arranged at the bottom of the box body (1) and is used for placing the powder tray assembly (3) and enabling the spiral head of a motor (31) to be tested in the powder tray assembly (3) to be arranged upwards;

the ejector rod (4) is arranged above the spiral head (32) of the motor to be tested in a lifting manner and is used for transmitting the rotating lifting force of the spiral head (32);

the detection cylinder (5) is arranged above the ejector rod (4) and is used for applying a set amount of downward pressure to the ejector rod (4); and

and the laser sensor (6) is fixedly arranged at the top of the box body (1), and the light path is right opposite to the detection cylinder (5) and is used for measuring the position change of the detection cylinder (5) along the height direction.

2. The motor torque testing device according to claim 1, wherein a cylinder rod of the detection cylinder is in threaded fastening connection with the ejector rod (4), and the motor torque testing device further comprises:

and the positioning assembly (7) is telescopically connected with the ejector rod (4), is fixedly connected with the cylinder barrel of the detection cylinder (5), and is movably arranged in the box body (1) so that the lower end of the ejector rod (4) is positioned above the spiral head (32) along the height direction and the front-back direction.

3. The motor torque testing device according to claim 2, characterized in that the positioning assembly (7) comprises:

a bottom plate (71);

the sliding plate (72) is arranged above the bottom plate (71) in a sliding manner along the front-back direction and is provided with a first through hole (721) for penetrating the ejector rod (4); and

and the first fixing frame (73) is fixedly arranged above the sliding plate (72) and is used for fixedly arranging the cylinder barrel of the detection cylinder (5) and enabling the vertical projection of the cylinder rod of the detection cylinder (5) on the sliding plate (72) to be superposed on the first through hole (721).

4. Motor torque testing device according to claim 3, characterized in that said positioning assembly (7) further comprises:

a rail plate (74) fixedly arranged above the bottom plate (71), wherein the upper surface of the rail plate is provided with a first slide rail (741) arranged along the front-back direction and used for being slidably connected with the sliding plate (72);

the second fixing frame (75) is vertically arranged at the rear part of the track plate (74) upwards and is provided with a second through hole (751); and

and the pushing cylinder (76) is fixedly arranged on the second fixing frame (75), and a cylinder rod passes through the second through hole (751) and is connected to the first fixing frame (73) and is used for driving the sliding plate (72) to slide back and forth relative to the track plate (74).

5. The motor torque testing device according to claim 4, wherein a front side of the bottom plate (71) is provided with a recessed portion (711) for receiving the jack (4) when the sliding plate (72) slides to a rearmost end along the first slide rail (741).

6. Motor torque testing device according to claim 5, characterized in that said positioning assembly (7) further comprises:

a top plate (77) fixedly arranged above the bottom plate (71) and the detection cylinder (5) through a vertical column; and

and the cylinder barrel is fixedly arranged at the top of the box body (1), and a cylinder rod penetrates through the top of the box body (1) and is connected to the top plate (77) and used for driving the top plate (77) to slide up and down relative to the top of the box body (1).

7. Motor torque testing device according to claim 6, characterized in that said positioning assembly (7) further comprises:

the second sliding rails (79) are fixedly arranged on the left side and the right side of the interior of the box body (1) along the height direction; and

and the sliding blocks (710) are fixedly arranged on the left side and the right side of the bottom plate (71) and are in sliding fit with the second sliding rails (79).

8. The motor torque testing arrangement of claim 6, further comprising:

the first air pressure regulating valve (81) is in air path communication with the detection cylinder (5), the propulsion cylinder (76) and the pressing cylinder (78) and is used for regulating the air supply pressure from the pressure air source; and

and a second air pressure regulating valve (82) which is arranged between the first air pressure regulating valve (81) and the detection cylinder (5) and is configured to control the air supply time and the air supply pressure of the detection cylinder (5).

9. The motor torque testing arrangement of claim 8, further comprising:

an electrical control box (91) communicatively connected to the laser sensor (6), the first air pressure regulating valve (81), and the second air pressure regulating valve (82), and configured to: after the powder disc assembly (3) is placed on the product placing block (2), the first air pressure adjusting valve (81) is controlled to be opened in response to a starting signal, the positioning assembly (7) is driven by the propelling cylinder (76) and the pressing cylinder (78) to position the ejector rod (4) above the screw head (32) of the motor to be tested along the front-back direction and the height direction, then the second air pressure adjusting valve (82) is controlled to be opened, the detection cylinder (5) applies a set downward pressure to the ejector rod (4), and finally the laser sensor (6) is used for detecting the position change of the detection cylinder (5) along the height direction, so that the torque of the motor to be tested (31) is tested; and

and the human-computer interface (92) is in communication connection with the electric control box (91) and is used for displaying a torque test result of the motor (31) to be tested.

10. The motor torque testing device according to claim 1, wherein the powder tray assembly (3) comprises two motors (31) to be tested, and the number of the ejector rods (4), the detection air cylinders (5) and the laser sensors (6) is two, so as to respectively perform torque testing on the two motors (31) to be tested.