CN217425073U - Wear test tool for roller chain hinge - Google Patents

Abstract

The utility model provides a roller chain hinge wear test frock includes initiative pendulum rod, installation connecting rod, a plurality of supporting shoe and loading mechanism at least. The driving swing rod can swing left and right. And the mounting connecting rod is connected with the driving swing rod. The installation connecting rod is provided with a plurality of connecting rods which are parallel to the driving swing rod, and the lower end of each connecting rod is provided with a connecting part which can be connected with a hinge. The supporting shoe is fixedly arranged below the connecting rod. The supporting block is provided with a mounting groove, and the shape of the mounting groove is matched with the hinge. The loading mechanism comprises a chain plate which can be connected with the hinge and a loading mechanism which is detachably and fixedly connected with the chain plate, and the chain plate is provided with an insertion hole through which a pin shaft of the hinge can pass. The utility model discloses can test the wear resistance of roller chain very conveniently.

Description

Wear test tool for roller chain hinge

Technical Field

The utility model relates to a chain testing arrangement field, concretely relates to roller chain hinge wear test frock.

Background

Roller chain transmission is an engagement transmission with intermediate flexible members, which has developed into a fundamental element of great importance in the modern mechanical industry. Wear is the most common failure mode of roller chains, and elements of roller chains are subject to wear damage during operation. One form of wear of the roller chain is wear caused by sliding friction between the pin and the bearing surface of the bushing as the roller chain oscillates and pulls between adjacent links as they engage and disengage the sprocket. Another form of wear is that tension between adjacent hinges increases the overall length of the roller chain, making the edges of the roller chain prone to jumping and increasing shock during start-up or reversing. The wear of the hinge pitch is extended to such an extent that the engagement of the roller chain hinge with the gear teeth is deteriorated, thereby causing a phenomenon of climbing and jumping, an increase in dynamic load, vibration, noise and other damages, etc.

Thus, wear resistance is an important performance indicator for chain products. The existing chain wear resistance test method at home and abroad is a whole chain wear test, and during the test, a roller chain is required to be integrally installed on chain wear test equipment, a certain load is applied, the roller chain runs at a specified speed, and the roller chain is periodically measured to determine the wear degree. For example, patent publication No. CN112254959A provides a chain wear resistance testing device and a method of using the same. The defect of the scheme is that the whole chain is long, so that the volume of the test equipment is relatively large for matching the chain, and the occupied area is large; moreover, the test energy consumption and noise are high, the labor intensity of test detection personnel is high, and the abrasion conditions of the bearing surfaces of the pin shaft and the sleeve in the hinge forming the chain cannot be intuitively observed due to the fact that the chain is tested, and if the abrasion conditions of the pin shaft are observed and measured, the pin shaft is disassembled to observe.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the existing equipment structure for testing the wear resistance of the chain and the use method are very complicated, the chain is generally required to be integrally installed on the equipment for testing, the size of the tested equipment is very large, the energy consumption and the noise are also large, and further the test method is also complicated.

In order to solve the technical problem, the utility model provides a technical scheme as follows:

the utility model provides a roller chain hinge wear test frock includes at least:

the driving swing rod is connected with a driving mechanism for driving the driving swing rod to swing left and right;

the mounting connecting rod is connected with the driving swing rod; the mounting connecting rod is provided with a plurality of connecting rods, the connecting rods are parallel to the driving swing rod, and the lower ends of the connecting rods are provided with connecting parts of hinges capable of connecting roller chains to be tested;

the loading mechanism comprises a chain plate which can be detachably and fixedly connected with a hinge, a loading mechanism which is detachably and fixedly connected with the chain plate and a plurality of supporting blocks, and the chain plate is provided with an insertion hole; the supporting block is fixedly arranged, an installation groove is formed in the supporting block, and the shape of the installation groove is matched with that of the hinge; the number of the supporting blocks is the same as that of the connecting rods, and the supporting blocks correspond to the positions of the connecting rods one to one.

Preferably, the driving mechanism comprises a driving rotating wheel, the driving rotating wheel is connected with a driving motor, and an eccentric connecting sliding block is arranged at a position deviating from the center of a circle on the driving rotating wheel; the driving swing rod is provided with a sliding groove, and the eccentric connecting sliding block is in sliding connection with the sliding groove.

Furthermore, an eccentric mounting groove extending along the radial direction is formed in the driving rotating wheel, the eccentric connecting sliding block is connected into the eccentric mounting groove, and the eccentric connecting sliding block can be fixed at any position in the eccentric mounting groove.

Preferably, the load mechanism includes: the load mounting plate is detachably connected with the chain plate; the load connecting block is fixedly connected with the load mounting plate; the load piece is detachably connected with the load connecting block in a specified manner.

Further, the link joint includes first link joint and second link joint, first link joint with the second link joint respectively with the both ends fixed connection of round pin axle, the load mounting panel is detachable fixed connection simultaneously first link joint with the second link joint.

Further, still include the locking piece, the locking piece can be with the link joint is fixed with the round pin axle locking.

Preferably, the connecting portion includes a clip which can grip an upper roller of the hinge.

Further, the chuck is in clearance fit connection with the upper roller.

Preferably, the device further comprises an auxiliary swing rod, the auxiliary swing rod is connected with the installation connecting rod and can swing left and right, the auxiliary swing rod is parallel to the driving swing rod, and the driving swing rod, the installation connecting rod and the auxiliary swing rod form a parallel four-bar mechanism.

Preferably, the swing mechanism further comprises a counting sensor and an angle encoder, wherein the counting sensor is used for measuring the swinging times of the driving swing rod, and the angle encoder is used for measuring the swinging amplitude of the driving swing rod.

The scheme can simulate the relative sliding friction of the surfaces of the pin shaft and other parts inside the hinge when the adjacent hinges swing at a specific angle with each other when the chain is meshed in and out of the chain wheel under the appointed load, record the wear state and determine the wear resistance by presetting the swing angle and the swing times of the bearing surface of the pin shaft.

The scheme has the advantages that:

1. this scheme is not whole to test the chain, but tests every hinge of constituteing the chain, because the volume of hinge is generally less, the whole size of roller chain hinge abrasion test frock can effectively be controlled, only carries out the abrasion test to the hinge in addition among the process of the test, and test equipment occupies the place for a short time.

2. The energy that this frock of drive needs to consume is lower, and produced vibration and noise are all less in the swing course of operation moreover.

3. The use method is very simple, the labor intensity of detection personnel is effectively reduced, and the safety of the test can be improved.

4. Because the hinge is tested, the hinge only needs to be detached when the abrasion condition is observed, the existing testing device tests the whole roller chain, the chain needs to be detached firstly when the abrasion condition is observed, and then the chain is detached to be the hinge, so that the abrasion condition can be confirmed more conveniently. Moreover, each hinge is independently loaded, and the chain abrasion test tool can test the hinges with different loading weights in one-time operation process.

Drawings

FIG. 1 is a schematic diagram of a preferred embodiment of a roller chain hinge wear test fixture;

FIG. 2 is a schematic view of the roller chain mounted on the supporting seat;

FIG. 3 is a front view of the loading assembly;

FIG. 4 shows a side view of the loading assembly;

description of reference numerals: 10-mounting connecting rod, 11-connecting rod, 111-chuck, 12-auxiliary swing rod, 13-driving swing rod, 20-hinge, 21-chain plate, 210-sleeve, 211-first chain plate, 212-second chain plate, 213-lower roller, 214-locking piece, 215-jack, 22-pin shaft, 23-hinge plate, 24-upper roller, 3-supporting table top, 31-supporting block, 310-mounting groove, 4-driving rotating wheel, 41-eccentric mounting groove, 42-eccentric connecting slide block, 43-sliding groove, 5-loading mechanism, 50-loading mounting plate, 51-loading connecting block and 52-loading piece.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may include, for example, a fixed connection, an integral connection, or a detachable connection; may be communication within two elements; they may be directly connected or indirectly connected through an intermediate, and those skilled in the art can understand the specific meaning of the above terms in the present invention in specific situations.

A preferred embodiment of the wear test tool for the roller chain hinge is shown in fig. 1, and includes a driving swing link 13, a mounting link 10, a supporting block 31 and a loading mechanism.

The lower end of the driving swing rod 13 is rotatably and movably connected to an external mechanism, for example, the driving swing rod 13 is rotatably and movably connected to the supporting tabletop 3, and the driving swing rod 13 is connected to a driving mechanism which can drive the driving swing rod 13 to swing left and right in a reciprocating manner. The adjusting driving mechanism can adjust the swing amplitude and the swing frequency of the driving swing rod 13, and different test working condition requirements are met. The driving mechanism can be a motor or various swing driving mechanisms which are commonly known in the prior art. The embodiment of the driving mechanism provided in this embodiment is preferable, the driving mechanism includes a driving wheel 4, the driving wheel 4 is connected with a driving motor, and the driving wheel 4 can rotate automatically. An eccentric connecting slide block 42 is arranged at a position deviating from the center of a circle on the driving rotating wheel 4, a sliding groove 43 is arranged on the driving swing rod 13, and the eccentric connecting slide block 42 is connected in the sliding groove 43. The sliding slot 43 extends along the length direction of the active swing link 13. When the driving wheel 4 rotates, the eccentric connecting slide block 42 can slide in the sliding groove 43 to drive the driving swing rod 13 to swing, so as to realize the driving function.

Further, the driving wheel 4 is further provided with an eccentric mounting groove 41 extending in the radial direction, and the eccentric link slider 42 can slide in the eccentric mounting groove 41 and can be fixed at any position in the eccentric mounting groove 41. The function of adjusting the swing amplitude of the driving swing rod 13 can be realized by adjusting the installation position of the eccentric connection sliding block 42.

The mounting connecting rod 10 is connected with the driving swing rod 13, and the mounting connecting rod 10 is horizontally arranged and can swing left and right along with the driving swing rod 13. The mounting connecting rod 10 is provided with a plurality of connecting rods 11, and the connecting rods 11 are parallel to the driving swing rod 13. When the installation connecting rod 10 moves left and right, the connecting rod 11 also swings left and right, and the connecting rod 11 can be connected with the hinge 20 of the roller chain to play a role of driving the hinge 20 to swing. Generally, the hinge comprises an upper roller 24, a hinge plate 23 and a lower roller 213, the hinge plate 23 is connected with the upper roller 24 and the lower roller 213 by a pin 24, a sleeve 210 matched with the pin 24 is further arranged in the upper roller 24 and the lower roller 213, and the sleeve 210 and the pin 24 form a group of hinges, so that the lower roller 213 can swing around the pin 24, and the abrasion caused by the relative sliding friction between the pressure bearing surfaces of the pin 24 and the sleeve 210 due to the mutual swing of adjacent hinges when the roller chain is engaged in and engaged out of a sprocket wheel under the specified load condition is simulated. The connecting rod 11 includes a clamping portion including a jaw 111, and the jaw 111 may clamp the upper roller 24 of the hinge. Of course, the connecting rod 11 may also stabilize the hinge 20 using other solutions as long as the upper roller 24 can be mounted on the connecting rod 11 and swing with the connecting rod 11.

Furthermore, an auxiliary swing rod 12 parallel to the driving swing rod 13 is further provided, the lower end of the auxiliary swing rod 12 is rotatably and movably connected to an external mechanism, and the connection position of the auxiliary swing rod 12 and the connection position of the lower end of the driving swing rod 13 are located at the same horizontal height. An auxiliary swing link 12 is also connected to the mounting link 10. The driving swing link 13, the auxiliary swing link 12 and the mounting link 10 form a parallel four-bar mechanism capable of moving stably. The auxiliary swing link 12 may function to enhance the swing stability of the driving swing link 13.

The supporting block 31 is fixedly arranged, for example, referring to the embodiment, the supporting table top 3 is arranged for fixing the supporting block 31. The supporting blocks 31 correspond to the connecting rods 11 one by one, and each connecting rod 11 corresponds to one supporting block 31. The supporting block 31 is provided with an installation groove 310, the installation groove 310 is matched with the shape of the lower roller 213 of the hinge, and the lower roller 213 can be installed in the installation groove 310. Specifically, the shape of the mounting groove 310 is the same as the shape of the tooth space of the sprocket connected when the hinge 20 is used, and the engagement of the hinge 20 with the sprocket can be simulated. The function of the support block 31 is to provide support for the hinge so that it can remain stable during testing.

The loading mechanism comprises a chain plate 21 and a loading mechanism, the loading mechanism is detachably and fixedly connected with the chain plate 21, and the chain plate 21 can be connected with the hinge 20. The link plate 21 and the hinge 20 are connected as shown in fig. 2, the link plate 21 is provided with an insertion hole 215, and the pin 22 is inserted into the lower roller 213 after passing through the insertion hole 215, thereby connecting the link plate 21 and the hinge 20 to each other. The loading mechanism may provide a pulling force to the pin 22 of the hinge to simulate the pulling force generated between adjacent hinges during actual use of the roller chain. When the connecting rod 11 swings to drive the hinges to swing, friction is generated between the chain plate 21 and the hinge plate 23 of the hinge 20, and the friction generated between adjacent hinges in the actual use process of the roller chain is simulated. During the swinging process of the hinge, the lower roller 213 rolls in the mounting groove 310, and the friction of the roller in the actual use process is simulated. The general roller is provided with a sleeve 210 matched with the pin 22, and the wear resistance of the sleeve 210 can be tested when the pin 22 rotates relative to the lower roller 213. Therefore, the roller chain hinge abrasion test tool can simulate various external force influences on the hinge in the using process. By replacing the load mechanism, the pulling force applied to the hinge can be adjusted, thereby facilitating the simulation of different working conditions.

As shown in fig. 2, the link plate 21 includes a first link plate 211 and a second link plate 212, the first link plate 211 and the second link plate 212 are respectively fixedly connected to two ends of the pin 22, and a locking member 214 may be disposed to press the link plate 21 and the hinge 20. The specific structure of the load mechanism is shown in fig. 3 and 4, and comprises a load mounting plate 50, a load connecting block 51 and a load member 52. The load mounting plate 50 is connected with the first chain plate 211 and the second chain plate 212, so that the load mechanism is stably connected with the chain plates, and the two sides of the chain plates 21 are stressed uniformly. The load connecting block 51 is fixedly connected with the load mounting plate 50, and a mounting position of a load member 52 is arranged on the load connecting block 51. The load member 52 can be removed, and by replacing the load member 52, the load applied to the load mechanism can be changed, so that the test can be performed easily, and the replacement method is very simple.

Further, the chuck 111 clamps the upper roller 24 in a clearance fit manner, and a certain clearance is formed between the upper roller 24 and the chuck 111, so that the upper roller 24 can be effectively prevented from being worn too much when the chuck 111 clamps the upper roller 24, and the wear test on the upper roller 24 can be performed after the hinge 20 is turned. This is because the connecting rod 11 only needs to play the role of pulling the hinge 20 to swing, and does not need to strictly clamp the hinge 20, and still can play the role of pulling the hinge 20 to swing on the premise of having a gap.

The use method of the roller chain hinge abrasion test tool comprises the following steps:

before testing, the amount of tension required to be applied to the hinge 20 is determined, and a load mechanism of appropriate weight is selected to be hung on the link plate 212.

The specific test steps include:

s1: the drive mechanism is adjusted such that the active rocker 13 can be swung within a predetermined amplitude range and at a predetermined frequency. Specifically, for the embodiment, first, the position of the eccentric link block 42 in the eccentric mounting groove 41 is adjusted, and the closer the eccentric link block 42 is to the edge of the driving wheel 4, the larger the swing amplitude of the driving swing link 13 is. The adjustment of the swing frequency of the driving swing rod 13 can be realized by adjusting the rotation speed of the driving rotating wheel 4. If necessary, a counting sensor and an angle encoder can be arranged to automatically record the swing frequency and swing amplitude of the active swing link 13.

S2: the hinge 20 is installed. The upper roller 24 is coupled to the connecting rod 11, the lower roller 213 is fitted into the mounting groove 310, and the link plate 21 is coupled to the lower roller 213. The link plate 21 is provided with an insertion hole 215, and the pin 22 is inserted into the lower roller 213 after passing through the insertion hole 215, so as to realize the connection between the link plate 21 and the hinge 20.

S3: and starting the driving mechanism to enable the driving swing rod 13 to swing, and driving the mounting connecting rod 10 and the connecting rod 11 to swing. The driving swing rod 13, the mounting connecting rod 10 and the connecting rod 11 form a parallel four-bar mechanism to swing left and right, so that the hinge 20 is driven to swing. Friction is generated between the hinge 20 and the chain plate 21, and meanwhile, the chain plate 21 can apply tension to the pin shaft 22, so that the stress mode of the hinge 20 in actual use is simulated, and a wear test is carried out.

S4: after a predetermined test time, the drive mechanism is stopped, the hinge 20 is removed and the wear is observed and recorded.

In the roller chain test method provided by the scheme, the pulling force applied to the pin shaft 22 by the chain plate 21 can simulate the pulling force generated between the mutually connected hinges when the roller chain is used; the friction between the chain plate 21 and the pin shaft 22 can simulate the friction borne by the pin shaft 22 in actual use; the friction generated between the chain plate 21 and the hinge plate 23 can simulate the friction born by the hinge plate 23 in actual use; the link plate 21 is fixedly connected to the pin 22 so that the pin 22 will also roll relative to the sleeve 210 as the hinge 20 swings, simulating wear caused by sliding friction between the bearing surfaces of the pin 24 and the sleeve 210 as adjacent hinges swing relative to each other as the roller chain engages and disengages the sprocket under specified load conditions. Therefore, the roller chain test method provided by the scheme can simulate various stress conditions of the hinge 20 in normal use, so that the tested wear resistance is more accurate. In addition, the hinge 20 is tested in the embodiment, and the abrasion condition of the pin 22 or other parts of the hinge 20 can be very intuitively observed after the hinge 20 is detached, so that the work flow is facilitated to be simplified, and the test efficiency is improved.

In summary, the above description is only a preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention should be included within the scope of the present invention.

Claims (10)

1. The utility model provides a roller chain hinge wear test frock which characterized in that includes at least:

the driving swing rod (13) is connected with a driving mechanism for driving the driving swing rod to swing left and right;

the mounting connecting rod (10) is connected with the driving oscillating bar; the mounting connecting rod is provided with a plurality of connecting rods (11), the connecting rods are parallel to the driving swing rod, and the lower ends of the connecting rods are provided with connecting parts of hinges (20) which can be connected with the roller chain to be tested;

the loading mechanism comprises a chain plate (21) which can be detachably and fixedly connected with a hinge, a loading mechanism which is detachably and fixedly connected with the chain plate and a plurality of supporting blocks (31), and the chain plate is provided with an insertion hole (215); the supporting block is fixedly arranged, an installation groove (310) is formed in the supporting block, and the shape of the installation groove is matched with that of the hinge; the number of the supporting blocks is the same as that of the connecting rods, and the supporting blocks correspond to the positions of the connecting rods one to one.

2. The roller chain hinge abrasion test tool according to claim 1, wherein the driving mechanism comprises a driving rotating wheel (4), the driving rotating wheel is connected with a driving motor, and an eccentric connecting sliding block (42) is arranged at a position deviating from a circle center on the driving rotating wheel; a sliding groove (43) is formed in the driving swing rod, and the eccentric connecting sliding block is in sliding connection with the sliding groove.

3. The roller chain hinge wear test tool of claim 2, wherein the driving runner is provided with an eccentric mounting groove (41) extending in a radial direction, the eccentric link slider is connected in the eccentric mounting groove, and the eccentric link slider can be fixed at any position in the eccentric mounting groove.

4. The roller chain hinge wear test tool of claim 1, wherein the loading mechanism comprises:

the load mounting plate (50) is detachably connected with the chain plate;

the load connecting block (51) is fixedly connected with the load mounting plate;

a load member (52) removably engaged with the load connection block.

5. The roller chain hinge wear test tooling of claim 4, wherein the link plate comprises a first link plate (211) and a second link plate (212), the first link plate and the second link plate are respectively fixedly connected with two ends of a pin shaft, and the load mounting plate is simultaneously detachably and fixedly connected with the first link plate and the second link plate.

6. The roller chain hinge wear test tooling of claim 5, further comprising a locking member (214) that locks and fixes the link plate to the pin.

7. The roller chain hinge wear test fixture of claim 1, characterized in that the connecting portion includes a collet (111) that can grip an upper roller (24) of the hinge.

8. The roller chain hinge wear test tool of claim 7, wherein the chuck is in clearance fit connection with the upper roller.

9. The roller chain hinge abrasion test tool according to claim 1, further comprising an auxiliary swing link (12), wherein the auxiliary swing link is connected with the mounting connecting rod and can swing left and right, the auxiliary swing link is parallel to the driving swing link, and the driving swing link, the mounting connecting rod and the auxiliary swing link form a parallel four-bar mechanism.

10. The roller chain hinge wear test tool according to any one of claims 1 to 9, further comprising a counting sensor and an angle encoder, wherein the counting sensor is used for measuring the number of times the driving swing rod swings, and the angle encoder is used for measuring the swing amplitude of the driving swing rod.

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