A linear guide pair running-in test machine

Abstract

The present invention discloses a linear guide pair running-in test machine, comprising a frame, wherein guide rail mounting plates are respectively arranged on the left and right sides of the top of the frame, a base and a movable bracket are arranged in the middle of the top of the frame, an auxiliary guide pair connected to the base is arranged at the bottom of the movable bracket, and connecting components capable of fixing a slider are respectively arranged on the left and right sides of the movable bracket, and a driving component capable of driving the movable bracket to move back and forth on the auxiliary guide pair is arranged between the movable bracket and the base, and the linear guide pair running-in test machine also comprises a loading component capable of applying pressure to the slider, and the loading component is in a tiger's mouth shape to press two sliders respectively installed on the upper and lower sides of the guide rail mounting plate against the guide rail. The present invention can not only reliably and at low cost test the actual friction and wear of the linear guide pair under different loads and the life under various speed conditions within a speed range of 5 m / s, but also can realize the simultaneous running-in of multiple sets of guide pairs to be tested.

Description

Technical Field

[0001] The invention relates to a linear guide pair running-in test machine, in particular to a test device for testing the friction and wear and high-speed durability of a high-speed rolling linear guide pair. Background Art

[0002] As a precision linear guide component, the rolling linear guide pair realizes rolling friction with the help of the rolling elements between the slider and the guide rail. Due to the small friction resistance of the guide pair, the small difference between dynamic and static friction assistance, it is not easy to creep at low speed, and it has excellent characteristics such as large load capacity, high precision, reliability and standardization. It has been widely used in CNC machine tools, precision instruments and other fields.

[0003] At present, the general rolling linear guide pair loading test equipment refers to Figure 5 , the guide rail pair 11 to be tested is installed on the machine tool base 12, the slider on the guide rail pair 11 to be tested is vertically loaded through the gantry 13, and two sets of auxiliary guide rail pairs 14 are installed under the gantry 13 for reciprocating running-in. In this way, the auxiliary guide rail pair 14 has to bear half of the loading force, and the auxiliary guide rail pair 14 often needs to be replaced after one or two tests, which is troublesome and wastes resources; in addition, if this structure is to achieve the simultaneous running-in of multiple sets of guide rail pairs to be tested, the span of the gantry must be increased, and the base must be made wider, and the overall structure appears to be huge, which is not conducive to implementation; at the same time, there is no high-speed test equipment in China that can meet the speed of 5 meters per second. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a linear guide pair running-in test machine which can reliably and cost-effectively test the actual friction and wear conditions of a linear guide pair under different loads and its life under various speed conditions within a speed range of 5 m / s, and can realize the simultaneous running-in of multiple sets of guide pairs to be tested.

[0005] In order to solve the above technical problems, the present invention provides a linear guide pair running-in test machine, with a rolling linear guide pair as the guide pair to be tested, the guide pair to be tested includes a guide rail and a slider, the linear guide pair running-in test machine includes a frame, guide rail mounting plates are respectively provided on the left and right sides of the top of the frame, and guide rail mounting holes for back-to-back fixed connection of the guide rails are respectively opened on the upper and lower sides of the guide rail mounting plate, a base is provided in the middle of the top of the frame, a movable bracket is provided on the base, an auxiliary guide pair is provided at the bottom of the movable bracket, the auxiliary guide pair is connected to the base, connecting components for fixed connection of the slider are respectively provided on the left and right sides of the movable bracket, a driving component that can drive the movable bracket to move back and forth on the auxiliary guide pair is provided between the movable bracket and the base, and the linear guide pair running-in test machine also includes a loading component that can apply pressure to the slider, the loading component is separated from the movable bracket, and the loading component is in a tiger's mouth shape to press two sliders respectively installed on the upper and lower sides of the guide rail mounting plate against the corresponding guide rails.

[0006] As a preferred solution of the present invention, the loading assembly includes a C-shaped arm, a threaded hole is provided at the upper end of the C-shaped arm, a screw is connected to the threaded hole, a pressure plate is provided at the lower end of the screw, and an upwardly protruding support portion is provided at the lower end of the C-shaped arm. The pressure plate and the support portion are arranged opposite to each other in upper and lower directions. Under the adjustment action of the screw, the pressure plate abuts against a slider installed on the upper side of the guide rail mounting plate, and the support portion abuts against a slider installed on the lower side of the guide rail mounting plate.

[0007] As a preferred solution of the present invention, the screw is provided with a torque meter for detecting the torque of the screw.

[0008] As a preferred solution of the present invention, a rotating handle is provided at the upper end of the screw.

[0009] As a preferred solution of the present invention, two auxiliary guide rail pairs are provided and are arranged symmetrically on the left and right, and the auxiliary guide rail pairs are rolling linear guide rail pairs.

[0010] As a preferred solution of the present invention, two auxiliary guide rail pairs are provided and are symmetrically arranged on the left and right, and the auxiliary guide rail pairs include a wheel rail, a positive guide wheel and a side guide wheel, the wheel rail is fixed on the base, the positive guide wheel and the side guide wheel are respectively installed on the bottom of the movable bracket through a guide wheel frame, the positive guide wheel is in rolling contact with the top surface of the wheel rail, and the side guide wheel is in rolling contact with the side surface of the wheel rail.

[0011] As a preferred solution of the present invention, the driving assembly includes a motor, a driving wheel, a driven wheel and a belt, the motor is fixed on the top of the mobile bracket, the power output end of the motor is connected to the driving wheel, the driven wheel is rotatably connected to the mobile bracket, the belt is parallel to the auxiliary guide rail pair, and both ends of the belt are fixed on the base, the driving wheel is pressed on one side of the belt, and the driven wheel is pressed on the other side of the belt.

[0012] As a preferred solution of the present invention, the connecting assembly includes a cross bar and a vertical bar, one end of the cross bar is connected to the movable bracket, the other end of the cross bar extends toward the side of the guide rail pair to be measured and is connected to the upper end of the vertical bar, and the lower end of the vertical bar is connected to the slider.

[0013] As a preferred solution of the present invention, the cross bar is provided with an elongated hole for the upper end of the vertical bar to pass through, and the upper end of the vertical bar is provided with a threaded portion, which passes through the elongated hole and is fixed to the movable bracket by a locking nut, and the lower end of the vertical bar can be movably inserted into the slider.

[0014] As a preferred solution of the present invention, the length and width of the guide rail mounting plate match the length and width of the guide rail pair to be tested, and the guide rail mounting plate is detachably connected to the frame.

[0015] Compared with the prior art, the linear guide pair running-in test machine provided by the present invention has the following beneficial effects:

[0016] The linear guide pair running-in test machine of the present invention arranges guide rail mounting plates on the left and right sides of the top of the frame, and a guide rail can be installed on the upper and lower sides of the guide rail mounting plates, and multiple slide blocks cooperating with the guide rails can be arranged as needed, that is, 4 guide rails and more than 4 slide blocks can be clamped at one time for running-in, so that multiple sets of guide pairs can be tested simultaneously, thereby improving the running-in test efficiency; at the same time, since the loading component and the movable bracket are separated from each other, the force applied by the loading component to the guide pair to be tested will not be transmitted to the machine driving support component (that is, the auxiliary guide pair at the bottom of the movable bracket), thereby extending the service life of the equipment and solving the problem of external load application of multiple sets of slide blocks at a low cost, reducing the running-in test cost, and can be suitable for testing the actual friction and wear conditions of the linear guide pair under different loads and the life under various speed conditions within a speed range of 5 m / s. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a linear guide pair running-in test machine provided by the present invention;

[0018] Figure 2 It is a front view of a linear guide pair running-in test machine provided by the present invention;

[0019] Figure 3 It is a partial side view of a linear guide pair running-in test machine provided by the present invention;

[0020] Figure 4 It is a structural schematic diagram of another implementation method of the auxiliary guide rail pair;

[0021] Figure 5 It is a structural schematic diagram of an existing rolling linear guide pair loading test equipment;

[0022] In the figure, 100, the frame, 101, the guide rail mounting plate, 102, the base, 103, the movable bracket, 104, the auxiliary guide rail pair, 105, the connecting assembly, 106, the driving assembly, 107, the loading assembly, 108, the C-shaped arm, 109, the screw, 110, the pressure plate, 111, the supporting part, 112, the rotating handle, 113, the wheel rail, 114, the positive guide wheel, 115, the side guide wheel, 116, the motor, 117, the driving wheel, 118, the driven wheel, 119, the belt, 120, the cross bar, 121, the vertical bar, 122, the long hole, 123, the locking nut, 200, the guide rail pair to be tested, 201, the guide rail, 202, the slider. DETAILED DESCRIPTION

[0023] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used in the present invention to indicate the orientation or position relationship is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be understood that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" used in the present invention should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] See also Figures 1 to 3 As shown, a preferred embodiment of the present invention is a linear guide pair running-in test machine, with a rolling linear guide pair as the guide pair 200 to be tested, the guide pair 200 to be tested includes a guide rail 201 and a slider 202, the linear guide pair running-in test machine includes a frame 100, the left and right sides of the top of the frame 100 are respectively provided with guide rail mounting plates 101, the upper and lower sides of the guide rail mounting plates 101 are respectively provided with guide rail mounting holes for back-to-back fixed connection of the guide rails 201, a base 102 is provided in the middle of the top of the frame 100, a movable bracket 103 is provided on the base 102, an auxiliary guide pair 104 is provided at the bottom of the movable bracket 103, and the auxiliary guide pair 104 is provided 04 is connected to the base 102, and the left and right sides of the movable bracket 103 are respectively provided with connecting components 105 for fixing the slider 202, and a driving component 106 is provided between the movable bracket 103 and the base 102, and can drive the movable bracket 103 to move back and forth on the auxiliary guide rail pair 104. The linear guide rail pair running-in testing machine also includes a loading component 107 that can apply pressure to the slider 202, and the loading component 107 is separated from the movable bracket 103. The loading component 107 is in a tiger's mouth shape and presses two sliders 202 respectively installed on the upper and lower sides of the guide rail mounting plate 101 against the corresponding guide rail 201.

[0027] It can be seen that the linear guide pair running-in test machine of the present invention arranges guide rail mounting plates 101 on the left and right sides of the top of the frame 100, and a guide rail 201 can be installed on the upper and lower sides of the guide rail mounting plate 101, and multiple sliders 202 cooperating with the guide rail 201 can be arranged as needed, that is, 4 guide rails 201 and more than 4 sliders 202 can be clamped at one time for running-in, so that multiple sets of guide pairs can be tested simultaneously, thereby improving the running-in test efficiency; at the same time, since the loading component 107 is separated from the movable bracket 103, the force applied by the loading component 107 to the guide pair 200 to be tested will not be transmitted to the machine driving support component (that is, the auxiliary guide pair 104 at the bottom of the movable bracket 103), thereby extending the service life of the equipment and solving the problem of external load application of multiple sets of sliders at a low cost, thereby reducing the running-in test cost, and can be suitable for testing the actual friction and wear of linear guide pairs under different loads and the life under various speed conditions within a speed range of 5 m / s.

[0028] It should also be noted that since the two guide rail pairs to be tested are mounted back to back on the guide rail mounting plate 101, the loads cancel each other out and are not transmitted to the guide rail mounting plate 101, thereby preventing the frame or the guide rail mounting plate from being deformed due to insufficient strength, which ultimately causes the guide rail pairs to be tested to tilt and affects the accuracy of the running-in test.

[0029] Exemplarily, the loading assembly 107 includes a C-shaped arm 108, the upper end of the C-shaped arm 108 is provided with a threaded hole, the threaded hole is connected to a screw 109, the lower end of the screw 109 is provided with a pressing plate 110, the lower end of the C-shaped arm 108 is provided with an upwardly protruding support portion 111, the pressing plate 110 and the support portion 111 are arranged opposite to each other up and down, under the adjustment of the screw 109, the pressing plate 110 abuts against a slider 202 installed on the upper side of the guide rail mounting plate 101, and the support portion 111 abuts against a slider 202 installed on the lower side of the guide rail mounting plate 101. Such a design can realize self-balancing loading of the upper and lower guide rail pairs 200 to be tested, and the loads acting on the upper and lower guide rail pairs 200 to be tested are the same, thereby ensuring the accuracy of the running-in test of each guide rail pair 200 to be tested.

[0030] Exemplarily, in order to facilitate the acquisition of loading data, a torque meter for detecting the torque of the screw 109 is provided on the screw 109 .

[0031] Exemplarily, a rotating handle 112 is provided at the upper end of the screw rod 109 to facilitate screwing the screw rod 109 in and out.

[0032] Exemplarily, the auxiliary guide rail pair 104 is provided with two and is arranged symmetrically on both sides, and the auxiliary guide rail pair 104 is a rolling linear guide rail pair. Of course, in another optional embodiment, such as Figure 4As shown, the auxiliary guide rail pair 104 includes a wheel rail 113, a positive guide wheel 114 and a side guide wheel 115. The wheel rail 113 is fixed on the base 102. The positive guide wheel 114 and the side guide wheel 115 are respectively installed on the bottom of the movable bracket 103 through guide wheel frames. The positive guide wheel 114 is in rolling contact with the top surface of the wheel rail 113, and the side guide wheel 115 is in rolling contact with the side surface of the wheel rail 113. It should be noted that even if the force exerted by the loading assembly 107 on the guide pair 200 to be tested will not be transmitted to the auxiliary guide pair 104, the auxiliary guide pair 104 itself bears the load of the upper components such as the mobile bracket 103 and the motor. If the auxiliary guide pair 104 adopts a rolling linear guide pair, while the running-in test is performed on the guide pair 200 to be tested, the running-in test is actually also performed on the auxiliary guide pair 104. Therefore, the quality requirements for using a rolling linear guide pair as the auxiliary guide pair 104 are relatively high, that is, the quality level of the auxiliary guide pair 104 should be higher than that of the guide pair 200 to be tested. The quality level is high, and the test cost is high; if a floating guide mechanism composed of a wheel rail 113, a positive guide wheel 114 and a side guide wheel 115 is used as the auxiliary guide pair 104, a certain degree of left and right swing of the movable bracket 103 can be allowed, and because the size of the positive guide wheel 114 and the side guide wheel 115 as rolling elements is much larger than the ball in the rolling linear guide pair, the allowable wear amount of the positive guide wheel 114 and the side guide wheel 115 is also relatively large, and the service life is longer. It also has the advantages of simple structure and low cost, which is more advantageous than using a rolling linear guide pair as the auxiliary guide pair 104.

[0033] In one embodiment, the driving assembly 106 includes a motor 116, a driving wheel 117, a driven wheel 118 and a belt 119. The motor 116 is fixed on the top of the mobile bracket 103, and the power output end of the motor 116 is connected to the driving wheel 117. The driven wheel 118 is rotatably connected to the mobile bracket 103. The belt 119 is parallel to the auxiliary guide rail pair 104, and both ends of the belt 119 are fixed on the base 102. The driving wheel 117 is pressed on one side of the belt 119, and the driven wheel 118 is pressed on the other side of the belt 119, so that the belt 119 is tensioned by the driving wheel 117 and the driven wheel 118. When the motor 116 drives the driving wheel 117 to rotate, since the belt 119 is fixed, the driving wheel 117 and the driven wheel 118 can roll on the belt 119, thereby driving the mobile bracket 103 to reciprocate on the auxiliary guide rail pair 104. It should be noted that, since the belt 119 is a flexible belt, it can adapt to the left and right swing of the movable bracket 103 to a certain extent, and the noise is low.

[0034] Exemplarily, the connection assembly 105 includes a crossbar 120 and a vertical bar 121, one end of the crossbar 120 is connected to the mobile bracket 103, the other end of the crossbar 120 extends toward one side of the guide rail pair 200 to be tested and is connected to the upper end of the vertical bar 121, and the lower end of the vertical bar 121 is connected to the slider 202. Specifically, the crossbar 120 is provided with an elongated hole 122 through which the upper end of the vertical bar 121 can pass, so as to facilitate the adjustment of the left and right positions of the vertical bar 121, the upper end of the vertical bar 121 is provided with a threaded portion, the threaded portion passes through the elongated hole 122 and is fixed to the mobile bracket 103 by a locking nut 123, and the lower end of the vertical bar 121 can be movably plugged into the slider 202, thereby realizing the connection between the mobile bracket 103 and the slider 202 of the guide rail pair 200 to be tested. It should be noted that since the lower end of the vertical rod 121 and the mounting hole of the slider 202 are movably connected, there is no vertical constraint between the movable bracket 103 and the guide rail pair 200 to be tested, and the forces in the vertical direction will not be transmitted to each other, which improves the accuracy of the running-in test of the guide rail pair 200 to be tested and extends the service life of the running-in test machine.

[0035] Exemplarily, to facilitate installation of different models of guide rail pairs 200 to be tested, the length and width of the guide rail mounting plate 101 match the length and width of the guide rail pair 200 to be tested, and the guide rail mounting plate 101 is detachably connected to the frame 100 .

[0036] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A linear guide pair running-in test machine, using a rolling linear guide pair as the guide pair to be tested, the guide pair to be tested includes a guide rail and a slider, characterized in that: The linear guide pair running-in test machine comprises a frame, guide rail mounting plates are respectively provided on the left and right sides of the top of the frame, guide rail mounting holes for the guide rails to be fixedly connected back to back are respectively opened on the upper and lower sides of the guide rail mounting plate, a base is provided in the middle of the top of the frame, a movable bracket is provided on the base, an auxiliary guide rail pair is provided at the bottom of the movable bracket, the auxiliary guide rail pair is connected to the base, connecting components for the slider to be fixedly connected are respectively provided on the left and right sides of the movable bracket, a driving component that can drive the movable bracket to move back and forth on the auxiliary guide rail pair is provided between the movable bracket and the base, and the linear guide pair running-in test machine also comprises a loading component that can apply pressure to the slider, and the loading component is in a tiger's mouth shape to press two sliders respectively installed on the upper and lower sides of the guide rail mounting plate against the corresponding guide rails; The loading assembly comprises a C-shaped arm, the upper end of the C-shaped arm is provided with a threaded hole, the threaded hole is connected with a screw rod, the lower end of the screw rod is provided with a pressing plate, the lower end of the C-shaped arm is provided with a supporting portion protruding upward, the pressing plate and the supporting portion are arranged opposite to each other in the upper and lower directions, under the adjustment of the screw rod, the pressing plate abuts against a slider installed on the upper side of the guide rail mounting plate, and the supporting portion abuts against a slider installed on the lower side of the guide rail mounting plate; The connecting assembly includes a cross bar and a vertical bar, one end of the cross bar is connected to the movable bracket, the other end of the cross bar extends toward one side of the guide rail pair to be measured and is connected to the upper end of the vertical bar, and the lower end of the vertical bar is connected to the slider; The cross bar is provided with an elongated hole for the upper end of the vertical bar to pass through, and the upper end of the vertical bar is provided with a threaded portion, which passes through the elongated hole and is fixed to the movable bracket through a locking nut, and the lower end of the vertical bar can be movably inserted into the sliding block.

2. A linear guide pair running-in test machine as claimed in claim 1, characterized in that: The screw is provided with a torque meter for detecting the torque of the screw.

3. A linear guide pair running-in test machine as claimed in claim 1, characterized in that: A rotating handle is provided at the upper end of the screw rod.

4. A linear guide pair running-in test machine as claimed in claim 1, characterized in that: The auxiliary guide rail pairs are provided with two and are arranged symmetrically on the left and right, and the auxiliary guide rail pairs are rolling linear guide rail pairs.

5. A linear guide pair running-in testing machine as claimed in claim 1, characterized in that: The auxiliary guide rail pairs are provided with two and are symmetrically arranged on the left and right. The auxiliary guide rail pairs include a wheel rail, a positive guide wheel and a side guide wheel. The wheel rail is fixed on the base. The positive guide wheel and the side guide wheel are respectively installed on the bottom of the movable bracket through a guide wheel frame. The positive guide wheel is in rolling contact with the top surface of the wheel rail, and the side guide wheel is in rolling contact with the side surface of the wheel rail.

6. A linear guide pair running-in testing machine as claimed in claim 1, characterized in that: The driving assembly includes a motor, a driving wheel, a driven wheel and a belt. The motor is fixed on the top of the mobile bracket, the power output end of the motor is connected to the driving wheel, the driven wheel is rotatably connected to the mobile bracket, the belt is parallel to the auxiliary guide rail pair, and both ends of the belt are fixed on the base, the driving wheel is pressed on one side of the belt, and the driven wheel is pressed on the other side of the belt.

7. A linear guide pair running-in testing machine as claimed in claim 1, characterized in that: The length and width of the guide rail mounting plate match the length and width of the guide rail pair to be tested, and the guide rail mounting plate is detachably connected to the frame.

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