A push rod motor test rack

Abstract

The utility model provides a kind of push rod motor test rack, it is related to push rod motor test technical field, comprising: main support, lifting frame, guide rail assembly and stroke driving component;Wherein, main support includes underframe and the support frame of being arranged on underframe;Lifting frame includes the pivotal end of being rotatably connected with support frame, the load end for placing counterweight, and the stress end for being rotatably connected with the push rod of push rod motor, make lifting frame pivot around pivotal end under the action of push rod;Guide rail assembly includes the guide rail being set along the length direction of underframe, and the mounting plate for being slidably along guide rail, to install push rod motor;Stroke driving component is installed on underframe, its output end is connected with mounting plate, for driving mounting plate moves along guide rail and is locked in the position required, to adapt the stroke of different push rod motor. Like this, it has the advantages that different push rod motor stroke can be adapted, and adaptability is wide.

Description

Technical Field

[0001] This utility model relates to the field of push rod motor testing technology, and in particular to a push rod motor testing fixture. Background Technology

[0002] Linear actuators are widely used in electric beds to lift the backrest and legrests. Existing technology typically employs a test frame for load testing of linear actuators, consisting of a fixed support, a counterweight mechanism rotatably mounted on the support for placing the load, and a mounting base for the actuator to drive the counterweight mechanism. However, these test frames are usually only compatible with linear actuators of a specific stroke, failing to meet the testing requirements of different models or specifications. In actual production, however, the stroke of linear actuators varies, significantly increasing operating costs for companies to test different models.

[0003] Therefore, a test fixture for push rod motors that can adapt to different push rod motor strokes and has wide adaptability needs to be designed. Utility Model Content

[0004] The purpose of this utility model is to provide a push rod motor test frame that addresses the defects and shortcomings of the existing technology, thereby solving at least one of the aforementioned technical problems. It has the advantages of being able to adapt to different push rod motor strokes and having wide adaptability.

[0005] To achieve the above objectives, this utility model provides a push rod motor test fixture, comprising: The main support frame includes a base frame and a support frame mounted on the base frame; The lifting frame includes a pivot end rotatably connected to the support frame, a bearing end for placing a counterweight, and a force-receiving end rotatably connected to a push rod of a push rod motor, so that the lifting frame pivots around the pivot end under the action of the push rod. The guide rail assembly includes a guide rail disposed along the length of the base frame, and a mounting plate that can slide along the guide rail for mounting a push rod motor; The stroke drive assembly is mounted on the base frame, and its output end is connected to the mounting plate. It is used to drive the mounting plate to move along the guide rail and lock it in the required position to adapt to the stroke of different push rod motors.

[0006] Optionally, the travel drive component includes: The elevator mounting base is installed on the base frame; A handwheel screw jack is installed on the jack mounting base, and its screw is connected to the mounting plate via a flange.

[0007] Optionally, the guide rail includes two optical axis guide rails symmetrically arranged on both sides of the lead screw via optical axis seats. The lower end of the mounting plate is provided with a graphite flange copper sleeve that slides with the optical axis guide rails. The end of the mounting plate away from the handwheel lead screw jack is provided with a mounting ear for rotating and mounting the push rod motor.

[0008] Optionally, the lifting frame includes a first rod, a second rod, and a third rod connected in sequence, the first rod, the second rod, and the third rod forming a triangular structure; wherein, the length of the first rod is greater than the length of the second rod, and the connection between the first rod and the second rod constitutes the pivot end; the end of the first rod away from the pivot end is the bearing end, and the end of the second rod away from the pivot end is the force-bearing end.

[0009] Optionally, the support frame has a bearing mounting seat on the side opposite to the stroke drive assembly, and a bearing is installed in the bearing mounting seat. The pivot end of the lifting frame is connected to the bearing through a perforated pin.

[0010] Optionally, the lifting frame has a support plate at its bearing end that is perpendicular to the first rod and extends along both sides; A counterweight mounting rod is vertically arranged on the support plate, and a limiting member is provided on the counterweight mounting rod; the counterweight block has a through groove with an opening along the side, which can be fitted into the counterweight mounting rod, and can be fixed on the counterweight mounting rod by the limiting member.

[0011] Optionally, the counterweight mounting rod extends along the upper and lower sides of the support plate to install the counterweight blocks on the upper and lower sides of the support plate respectively.

[0012] Optionally, the support plate has a through hole, and the counterweight mounting rod passes through the through hole; The limiting component includes: A limiting ring fixed at the bottom end of the counterweight mounting rod; A first open fixing ring is sleeved on the counterweight mounting rod and clamped between the counterweight block and the bottom of the support plate; A second open fixing ring is fitted onto the upper end of the counterweight mounting rod and is used for fixing the counterweight block at the upper end of the fixed support plate.

[0013] Optionally, anti-vibration pads are provided at the corners of the bottom surface of the base frame and in the corresponding mounting area of ​​the support frame.

[0014] Optionally, the base frame is provided with two support frames, two lifting frames, two sets of guide rail assemblies and two sets of stroke drive assemblies along the width direction, for simultaneously performing load tests on two push rod motors.

[0015] Compared with the prior art, the advantages of this application are: Because this push rod motor test fixture has a guide rail along the length of the base frame, a mounting plate for sliding push rod motors, and a stroke drive assembly that drives and locks the position of the mounting plate, the initial stroke of the push rod motor can be flexibly adjusted and fixed, thereby adapting to the testing needs of push rod motors of different specifications and improving the adaptability and versatility of the test fixture. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the push rod motor test frame according to an embodiment of the present invention; Figure 2 This is a structural schematic diagram of the push rod motor test frame from another perspective, according to an embodiment of this utility model. Figure 3 This is a schematic diagram of the handwheel screw jack according to an embodiment of the present invention; Figure 4 This is a partial exploded view of the push rod motor test frame according to an embodiment of the present utility model; Figure 5 This is an exploded view of another part of the push rod motor test frame according to an embodiment of the present utility model; Explanation of reference numerals in the attached figures 100-Push Rod Motor Test Stand; 1-Main frame; 11-Base frame; 12-Support frame; 121-Bearing mounting seat; 122-Bearing; 2-Lifting frame; a-Pivot end; b-Bearing end; c-Force-bearing end; 21-First rod; 22-Second rod; 23-Third rod; 24-Pin with hole; 25-Support plate; 26-Counterweight mounting rod; 27-Limiting ring; 28-First open fixing ring; 29-Second open fixing ring; 3-Guide rail assembly; 31-Optical axis guide rail; 32-Mounting plate; 33-Graphite flange copper sleeve; 34-Mounting ear; 4-Stroke drive assembly; 41-Lifting platform mounting base; 42-Handwheel screw jack; 421-Lifting platform housing; 422-Drive shaft; 433-Handwheel; 434-Screw; 45-Flange; 5- Shock-absorbing foot pads; 6-Short shaft pin; 7-Counterweight; d-Through groove; 200-Push Rod Motor. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] It should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," "back," "side," and "circumferential" used in this utility model to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used to distinguish multiple parts or structures with the same or similar structures, and do not indicate any special limitation on the arrangement order or connection relationship.

[0020] Please refer to Figures 1 to 5 This utility model embodiment provides a push rod motor test frame 100 for load testing of a push rod motor 200. It includes: a main support 1, a lifting frame 2, a guide rail assembly 3, and a stroke drive assembly 4.

[0021] The main support frame 1 includes a base frame 11 and a support frame 12. Specifically, the base frame 11 is composed of several horizontal and vertical bars, and is rectangular in shape, used to support the various components on it. The support frame 12 is mounted on the base frame 11 and is arranged along the length of the base frame 11, and is roughly in the shape of a door frame. Specifically, in this embodiment, both the base frame 11 and the support frame 12 are made of materials with sufficient strength, such as metal frames.

[0022] The lifting frame 2 consists of several rods, including a pivot end a, a load-bearing end b, and a force-bearing end c. The pivot end a is rotatably connected to the support frame 12, the load-bearing end b is used to place the counterweight 7, and the force-bearing end c is rotatably connected to the push rod of the push rod motor 200. Thus, when the push rod extends or retracts, the lifting frame 2 can pivot around the pivot end a under the action of the push rod, thereby enabling load testing of the push rod motor 200.

[0023] The guide rail assembly 3 includes a guide rail and a mounting plate 32. The guide rail is arranged along the length of the base frame 11. The mounting plate 32 can slide along the guide rail and is used for mounting the push rod motor 200. That is, the housing of the push rod motor 200 is mounted on the mounting plate 32 and can move along the guide rail with the mounting plate 32.

[0024] The stroke drive assembly 4 is mounted on the base frame 11, and its output end is connected to the mounting plate 32. It is used to drive the mounting plate 32 to move along the guide rail and lock it in the required position to adapt to the stroke of different push rod motors 200. In this way, after the push rod motor 200 is mounted on the mounting plate 32 and the push rod of the push rod motor 200 is rotatably mounted to the force-bearing end c of the lifting frame 2, the initial stroke of the push rod motor 200 can be adjusted by the stroke drive assembly 4.

[0025] Because the push rod motor test frame 100 is equipped with a guide rail along the length of the base frame 11, a mounting plate 32 for slidingly mounting the push rod motor 200, and a stroke drive assembly 4 for driving and locking the position of the mounting plate 32, the initial stroke of the push rod motor 200 can be flexibly adjusted and fixed, thereby adapting to the testing requirements of push rod motors 200 of different specifications and improving the adaptability and versatility of the push rod motor test frame 100.

[0026] To smoothly drive the push rod motor 200 for initial stroke adjustment and to stably lock the position of the push rod motor 200, optionally, please refer to... Figure 1 and Figure 3 In this embodiment, the stroke drive assembly 4 includes: a lift base 41 and a handwheel screw lift 42.

[0027] The lifting platform mounting base 41 is mounted on the base frame 11. The handwheel screw jack 42 is mounted on the lifting platform mounting base 41, and its screw 434 is connected to the mounting plate 32 via a flange 45. Specifically, the lifting platform mounting base 41 and the base frame 11, and the handwheel screw jack 42 and the lifting platform mounting base 41 can all be fixed together using threaded fasteners.

[0028] The handwheel screw jack 42 typically includes a jack housing 421, a drive shaft 422 rotatably mounted on and extending out of the jack housing 421, a handwheel 433 connected to the outer end of the drive shaft 422, and a portion of the drive shaft 422 being a worm gear (not shown in the figure). The worm gear meshes with a worm wheel nut (not shown in the figure) located inside the housing, and the worm wheel nut is screwed to the screw jack 434. Since the worm wheel nut is restricted from moving axially, when the handwheel 433 is rotated, the screw jack 434 can extend and retract axially, thereby driving the push rod motor 200 on the mounting plate 32 to move smoothly along the guide rail.

[0029] Due to the self-locking characteristic of the lead screw 434, the push rod motor 200 can be reliably kept in the set position after adjustment, avoiding position deviation, thus achieving both smooth drive and stable locking. Of course, in other embodiments, the stroke drive component 4 can also be driven by an electric lead screw jack, cylinder, electric cylinder, etc., and no specific limitation is made here.

[0030] To address the issues of wobbling and instability of the mounting plate 32 during movement, as well as the easy wear of sliding parts, alternatively, please refer to... Figure 2 and Figure 4 In this embodiment, the guide rail includes two optical axis guide rails 31 symmetrically arranged on both sides of the lead screw 434 via optical axis seats. The lower end of the mounting plate 32 is provided with a graphite flange copper sleeve 33 that slides with the optical axis guide rails 31, and the mounting plate 32 is slidably connected to the optical axis guide rails 31 via the graphite flange copper sleeve 33. The end of the mounting plate 32 away from the handwheel lead screw jack 42 is provided with a mounting ear 34 for rotating and mounting the push rod motor 200. Specifically, the push rod motor 200 can be rotatably mounted on the mounting ear 34 via a short shaft pin 6. The two optical axis guide rails 31 improve the smoothness of the sliding of the mounting plate 32, and the graphite flange copper sleeve 33 has wear resistance and self-lubricating properties, which reduces friction and achieves a smooth and precise guiding effect. Of course, in other embodiments, the guide rail can also be a square linear guide rail, and the graphite flange copper sleeve 33 can be replaced with a slider structure; no specific limitations are made here.

[0031] To increase the stability of the lifting frame 2 and address the issue of excessive motor thrust demand on the lifting frame 2, alternatively, please refer to... Figure 4 and Figure 5 In this embodiment, the lifting frame 2 includes a first rod 21, a second rod 22, and a third rod 23 connected in sequence. The first rod 21, the second rod 22, and the third rod 23 are connected to form a triangular structure. The triangle is a stable geometric shape, which can enhance the overall deformation resistance of the lifting frame 2. The length of the first rod 21 is greater than the length of the second rod 22, and the connection between the first rod 21 and the second rod 22 constitutes a pivot end a. The end of the first rod 21 away from the pivot end a is the bearing end b, and the end of the second rod 22 away from the pivot end a is the force-bearing end c. In this way, the lifting frame 2 forms a lever structure in which the lever arm of the bearing end b is greater than the lever arm of the force-bearing end c, so that the push rod motor 200 can drive the counterweight with a smaller thrust, thereby achieving a force-increasing effect.

[0032] Alternatively, please refer to Figure 4 In this embodiment, the support frame 12 is provided with a bearing fixing seat 121 on the side away from the stroke drive assembly 4. A bearing 122 is installed in the bearing fixing seat 121. The pivot end a of the lifting frame 2 is connected to the bearing 122 through a pin 24 with holes, so that the lifting frame 2 can rotate smoothly around the pivot end a.

[0033] To facilitate the installation and fixing of counterweight 7, optionally, please refer to... Figure 5In this embodiment, the bearing end b of the lifting frame 2 is provided with a support plate 25 that is perpendicular to the first rod 21 and extends along both sides. A counterweight mounting rod 26 is vertically arranged on the support plate 25, and a limiting member is provided on the counterweight mounting rod 26. The counterweight block 7 has a through groove d with an opening along the side, which can be fitted into the counterweight mounting rod 26 and can be fixed to the counterweight mounting rod 26 by the limiting member. In this way, through the cooperation between the counterweight mounting rods 26 on both sides of the first rod 21 and the through groove d of the counterweight block 7, the counterweight block 7 can be quickly and stably loaded on the bearing end b, thereby improving the balance and stability of the lifting frame 2 under force.

[0034] To reduce the risk of tipping over due to an excessively high load center during the lifting process of the lifting frame 2, optionally, please refer to... Figure 5 In this embodiment, the counterweight mounting rod 26 extends along the upper and lower sides of the support plate 25 to install counterweight blocks 7 on the upper and lower sides of the support plate 25 respectively. This lowers the overall center of gravity of the counterweight blocks 7, thereby improving the stability and safety of the push rod motor 200 under load.

[0035] Alternatively, please refer to Figure 5 In this embodiment, the support plate 25 has a through hole (not shown in the figure), through which the counterweight mounting rod 26 passes. The limiting components include: a limiting ring 27, a first open fixing ring 28, and a second open fixing ring 29. The limiting ring 27 is fixed to the bottom end of the counterweight mounting rod 26. Specifically, in this embodiment, the limiting ring 27 is welded to the bottom end of the counterweight mounting rod 26 to form an integral structure. The first open fixing ring 28 is sleeved on the counterweight mounting rod 26 and clamped between the counterweight block 7 and the bottom of the support plate 25. The second open fixing ring 29 is sleeved on the upper end of the counterweight mounting rod 26 and is used to fix the counterweight block 7 at the upper end of the support plate 25.

[0036] The installation process of counterweight 7 is as follows: a portion of counterweight 7 is stacked along the through groove d on the counterweight mounting rod 26 and locked by the first open fixing ring 28; then, the through hole on the support plate 25 on the lifting frame 2 is aligned with the counterweight mounting rod 26 and inserted; then another portion of counterweight 7 is stacked along the through groove d on the counterweight mounting rod 26 above the support plate 25 and locked by the second open fixing ring 29.

[0037] This structure allows for stable installation of the counterweight 7 on both the top and bottom sides.

[0038] Alternatively, please refer to Figure 2 In this embodiment, anti-vibration pads 5 are provided at the corners of the bottom surface of the base frame 11 and in the corresponding mounting area of ​​the support frame 12. This improves the overall stability of the push rod motor test frame 100 and reduces displacement or tilting caused by vibration. Specifically, the anti-vibration pads 5 are rubber pads.

[0039] Alternatively, please refer to Figure 1 and Figure 2 In this embodiment, the base frame 11 is provided with two support frames 12, two lifting frames 2, two sets of guide rail assemblies 3 and two sets of stroke drive assemblies 4 along the width direction, which are used to simultaneously perform load tests on two push rod motors 200, saving time and labor costs.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the substance of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A push rod motor test fixture, characterized in that, include: The main support frame includes a base frame and a support frame mounted on the base frame; The lifting frame includes a pivot end rotatably connected to the support frame, a bearing end for placing a counterweight, and a force-receiving end rotatably connected to a push rod of a push rod motor, so that the lifting frame pivots around the pivot end under the action of the push rod. The guide rail assembly includes a guide rail disposed along the length of the base frame, and a mounting plate that can slide along the guide rail for mounting a push rod motor; The stroke drive assembly is mounted on the base frame, and its output end is connected to the mounting plate. It is used to drive the mounting plate to move along the guide rail and lock it in the required position to adapt to the stroke of different push rod motors.

2. The push rod motor test fixture as described in claim 1, characterized in that, The stroke drive component includes: The elevator mounting base is installed on the base frame; A handwheel screw jack is installed on the jack mounting base, and its screw is connected to the mounting plate via a flange.

3. The push rod motor test fixture as described in claim 2, characterized in that, The guide rail includes two optical axis guide rails symmetrically arranged on both sides of the lead screw via optical axis seats. The lower end of the mounting plate is provided with a graphite flange copper sleeve that slides with the optical axis guide rails. The end of the mounting plate away from the handwheel lead screw jack is provided with a mounting ear for rotating and mounting the push rod motor.

4. The push rod motor test fixture as described in claim 1, characterized in that, The lifting frame includes a first rod, a second rod, and a third rod connected in sequence, and the first rod, the second rod, and the third rod are connected to form a triangular structure; Wherein, the length of the first rod is greater than the length of the second rod, and the connection between the first rod and the second rod constitutes the pivot end, the end of the first rod away from the pivot end is the bearing end, and the end of the second rod away from the pivot end is the force-bearing end.

5. The push rod motor test fixture as described in claim 4, characterized in that, The support frame has a bearing mounting seat on the side opposite to the stroke drive assembly, and a bearing is installed in the bearing mounting seat. The pivot end of the lifting frame is connected to the bearing through a perforated pin.

6. The push rod motor test fixture as described in claim 4, characterized in that, The lifting frame has a support plate at its bearing end that is perpendicular to the first rod and extends along both sides; A counterweight mounting rod is vertically arranged on the support plate, and a limiting member is provided on the counterweight mounting rod; the counterweight block has a through groove with an opening along the side, which can be fitted into the counterweight mounting rod, and can be fixed on the counterweight mounting rod by the limiting member.

7. The push rod motor test fixture as described in claim 6, characterized in that, The counterweight mounting rod extends along the upper and lower sides of the support plate to install the counterweight blocks on the upper and lower sides of the support plate respectively.

8. The push rod motor test fixture as described in claim 7, characterized in that, The support plate has a through hole, and the counterweight mounting rod passes through the through hole; The limiting component includes: A limiting ring fixed at the bottom end of the counterweight mounting rod; A first open fixing ring is sleeved on the counterweight mounting rod and clamped between the counterweight block and the bottom of the support plate; A second open fixing ring is fitted onto the upper end of the counterweight mounting rod to fix the counterweight block on the upper end of the support plate.

9. The push rod motor test fixture as described in claim 1, characterized in that, The bottom corners of the base frame and the corresponding mounting area of ​​the support frame are provided with anti-vibration pads.

10. The push rod motor test fixture as described in any one of claims 1-9, characterized in that, The base frame is provided with two support frames, two lifting frames, two sets of guide rail assemblies and two sets of stroke drive assemblies along the width direction, which are used to simultaneously perform load tests on two push rod motors.

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